| /************************************************* |
| * pcregrep program * |
| *************************************************/ |
| |
| /* This is a grep program that uses the PCRE regular expression library to do |
| its pattern matching. On a Unix or Win32 system it can recurse into |
| directories. |
| |
| Copyright (c) 1997-2011 University of Cambridge |
| |
| ----------------------------------------------------------------------------- |
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the following conditions are met: |
| |
| * Redistributions of source code must retain the above copyright notice, |
| this list of conditions and the following disclaimer. |
| |
| * Redistributions in binary form must reproduce the above copyright |
| notice, this list of conditions and the following disclaimer in the |
| documentation and/or other materials provided with the distribution. |
| |
| * Neither the name of the University of Cambridge nor the names of its |
| contributors may be used to endorse or promote products derived from |
| this software without specific prior written permission. |
| |
| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| POSSIBILITY OF SUCH DAMAGE. |
| ----------------------------------------------------------------------------- |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include <ctype.h> |
| #include <locale.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <stdlib.h> |
| #include <errno.h> |
| |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| |
| #ifdef HAVE_UNISTD_H |
| #include <unistd.h> |
| #endif |
| |
| #ifdef SUPPORT_LIBZ |
| #include <zlib.h> |
| #endif |
| |
| #ifdef SUPPORT_LIBBZ2 |
| #include <bzlib.h> |
| #endif |
| |
| #include "pcre.h" |
| |
| #define FALSE 0 |
| #define TRUE 1 |
| |
| typedef int BOOL; |
| |
| #define MAX_PATTERN_COUNT 100 |
| #define OFFSET_SIZE 99 |
| |
| #if BUFSIZ > 8192 |
| #define PATBUFSIZE BUFSIZ |
| #else |
| #define PATBUFSIZE 8192 |
| #endif |
| |
| /* Values for the "filenames" variable, which specifies options for file name |
| output. The order is important; it is assumed that a file name is wanted for |
| all values greater than FN_DEFAULT. */ |
| |
| enum { FN_NONE, FN_DEFAULT, FN_MATCH_ONLY, FN_NOMATCH_ONLY, FN_FORCE }; |
| |
| /* File reading styles */ |
| |
| enum { FR_PLAIN, FR_LIBZ, FR_LIBBZ2 }; |
| |
| /* Actions for the -d and -D options */ |
| |
| enum { dee_READ, dee_SKIP, dee_RECURSE }; |
| enum { DEE_READ, DEE_SKIP }; |
| |
| /* Actions for special processing options (flag bits) */ |
| |
| #define PO_WORD_MATCH 0x0001 |
| #define PO_LINE_MATCH 0x0002 |
| #define PO_FIXED_STRINGS 0x0004 |
| |
| /* Line ending types */ |
| |
| enum { EL_LF, EL_CR, EL_CRLF, EL_ANY, EL_ANYCRLF }; |
| |
| /* In newer versions of gcc, with FORTIFY_SOURCE set (the default in some |
| environments), a warning is issued if the value of fwrite() is ignored. |
| Unfortunately, casting to (void) does not suppress the warning. To get round |
| this, we use a macro that compiles a fudge. Oddly, this does not also seem to |
| apply to fprintf(). */ |
| |
| #define FWRITE(a,b,c,d) if (fwrite(a,b,c,d)) {} |
| |
| |
| |
| /************************************************* |
| * Global variables * |
| *************************************************/ |
| |
| /* Jeffrey Friedl has some debugging requirements that are not part of the |
| regular code. */ |
| |
| #ifdef JFRIEDL_DEBUG |
| static int S_arg = -1; |
| static unsigned int jfriedl_XR = 0; /* repeat regex attempt this many times */ |
| static unsigned int jfriedl_XT = 0; /* replicate text this many times */ |
| static const char *jfriedl_prefix = ""; |
| static const char *jfriedl_postfix = ""; |
| #endif |
| |
| static int endlinetype; |
| |
| static char *colour_string = (char *)"1;31"; |
| static char *colour_option = NULL; |
| static char *dee_option = NULL; |
| static char *DEE_option = NULL; |
| static char *main_buffer = NULL; |
| static char *newline = NULL; |
| static char *pattern_filename = NULL; |
| static char *stdin_name = (char *)"(standard input)"; |
| static char *locale = NULL; |
| |
| static const unsigned char *pcretables = NULL; |
| |
| static int pattern_count = 0; |
| static pcre **pattern_list = NULL; |
| static pcre_extra **hints_list = NULL; |
| |
| static char *include_pattern = NULL; |
| static char *exclude_pattern = NULL; |
| static char *include_dir_pattern = NULL; |
| static char *exclude_dir_pattern = NULL; |
| |
| static pcre *include_compiled = NULL; |
| static pcre *exclude_compiled = NULL; |
| static pcre *include_dir_compiled = NULL; |
| static pcre *exclude_dir_compiled = NULL; |
| |
| static int after_context = 0; |
| static int before_context = 0; |
| static int both_context = 0; |
| static int bufthird = PCREGREP_BUFSIZE; |
| static int bufsize = 3*PCREGREP_BUFSIZE; |
| static int dee_action = dee_READ; |
| static int DEE_action = DEE_READ; |
| static int error_count = 0; |
| static int filenames = FN_DEFAULT; |
| static int only_matching = -1; |
| static int process_options = 0; |
| |
| #ifdef SUPPORT_PCREGREP_JIT |
| static int study_options = PCRE_STUDY_JIT_COMPILE; |
| #else |
| static int study_options = 0; |
| #endif |
| |
| static unsigned long int match_limit = 0; |
| static unsigned long int match_limit_recursion = 0; |
| |
| static BOOL count_only = FALSE; |
| static BOOL do_colour = FALSE; |
| static BOOL file_offsets = FALSE; |
| static BOOL hyphenpending = FALSE; |
| static BOOL invert = FALSE; |
| static BOOL line_buffered = FALSE; |
| static BOOL line_offsets = FALSE; |
| static BOOL multiline = FALSE; |
| static BOOL number = FALSE; |
| static BOOL omit_zero_count = FALSE; |
| static BOOL resource_error = FALSE; |
| static BOOL quiet = FALSE; |
| static BOOL silent = FALSE; |
| static BOOL utf8 = FALSE; |
| |
| /* Structure for options and list of them */ |
| |
| enum { OP_NODATA, OP_STRING, OP_OP_STRING, OP_NUMBER, OP_LONGNUMBER, |
| OP_OP_NUMBER, OP_PATLIST }; |
| |
| typedef struct option_item { |
| int type; |
| int one_char; |
| void *dataptr; |
| const char *long_name; |
| const char *help_text; |
| } option_item; |
| |
| /* Options without a single-letter equivalent get a negative value. This can be |
| used to identify them. */ |
| |
| #define N_COLOUR (-1) |
| #define N_EXCLUDE (-2) |
| #define N_EXCLUDE_DIR (-3) |
| #define N_HELP (-4) |
| #define N_INCLUDE (-5) |
| #define N_INCLUDE_DIR (-6) |
| #define N_LABEL (-7) |
| #define N_LOCALE (-8) |
| #define N_NULL (-9) |
| #define N_LOFFSETS (-10) |
| #define N_FOFFSETS (-11) |
| #define N_LBUFFER (-12) |
| #define N_M_LIMIT (-13) |
| #define N_M_LIMIT_REC (-14) |
| #define N_BUFSIZE (-15) |
| #define N_NOJIT (-16) |
| |
| static option_item optionlist[] = { |
| { OP_NODATA, N_NULL, NULL, "", " terminate options" }, |
| { OP_NODATA, N_HELP, NULL, "help", "display this help and exit" }, |
| { OP_NUMBER, 'A', &after_context, "after-context=number", "set number of following context lines" }, |
| { OP_NUMBER, 'B', &before_context, "before-context=number", "set number of prior context lines" }, |
| { OP_NUMBER, N_BUFSIZE,&bufthird, "buffer-size=number", "set processing buffer size parameter" }, |
| { OP_OP_STRING, N_COLOUR, &colour_option, "color=option", "matched text color option" }, |
| { OP_OP_STRING, N_COLOUR, &colour_option, "colour=option", "matched text colour option" }, |
| { OP_NUMBER, 'C', &both_context, "context=number", "set number of context lines, before & after" }, |
| { OP_NODATA, 'c', NULL, "count", "print only a count of matching lines per FILE" }, |
| { OP_STRING, 'D', &DEE_option, "devices=action","how to handle devices, FIFOs, and sockets" }, |
| { OP_STRING, 'd', &dee_option, "directories=action", "how to handle directories" }, |
| { OP_PATLIST, 'e', NULL, "regex(p)=pattern", "specify pattern (may be used more than once)" }, |
| { OP_NODATA, 'F', NULL, "fixed-strings", "patterns are sets of newline-separated strings" }, |
| { OP_STRING, 'f', &pattern_filename, "file=path", "read patterns from file" }, |
| { OP_NODATA, N_FOFFSETS, NULL, "file-offsets", "output file offsets, not text" }, |
| { OP_NODATA, 'H', NULL, "with-filename", "force the prefixing filename on output" }, |
| { OP_NODATA, 'h', NULL, "no-filename", "suppress the prefixing filename on output" }, |
| { OP_NODATA, 'i', NULL, "ignore-case", "ignore case distinctions" }, |
| #ifdef SUPPORT_PCREGREP_JIT |
| { OP_NODATA, N_NOJIT, NULL, "no-jit", "do not use just-in-time compiler optimization" }, |
| #else |
| { OP_NODATA, N_NOJIT, NULL, "no-jit", "ignored: this pcregrep does not support JIT" }, |
| #endif |
| { OP_NODATA, 'l', NULL, "files-with-matches", "print only FILE names containing matches" }, |
| { OP_NODATA, 'L', NULL, "files-without-match","print only FILE names not containing matches" }, |
| { OP_STRING, N_LABEL, &stdin_name, "label=name", "set name for standard input" }, |
| { OP_NODATA, N_LBUFFER, NULL, "line-buffered", "use line buffering" }, |
| { OP_NODATA, N_LOFFSETS, NULL, "line-offsets", "output line numbers and offsets, not text" }, |
| { OP_STRING, N_LOCALE, &locale, "locale=locale", "use the named locale" }, |
| { OP_LONGNUMBER, N_M_LIMIT, &match_limit, "match-limit=number", "set PCRE match limit option" }, |
| { OP_LONGNUMBER, N_M_LIMIT_REC, &match_limit_recursion, "recursion-limit=number", "set PCRE match recursion limit option" }, |
| { OP_NODATA, 'M', NULL, "multiline", "run in multiline mode" }, |
| { OP_STRING, 'N', &newline, "newline=type", "set newline type (CR, LF, CRLF, ANYCRLF or ANY)" }, |
| { OP_NODATA, 'n', NULL, "line-number", "print line number with output lines" }, |
| { OP_OP_NUMBER, 'o', &only_matching, "only-matching=n", "show only the part of the line that matched" }, |
| { OP_NODATA, 'q', NULL, "quiet", "suppress output, just set return code" }, |
| { OP_NODATA, 'r', NULL, "recursive", "recursively scan sub-directories" }, |
| { OP_STRING, N_EXCLUDE,&exclude_pattern, "exclude=pattern","exclude matching files when recursing" }, |
| { OP_STRING, N_INCLUDE,&include_pattern, "include=pattern","include matching files when recursing" }, |
| { OP_STRING, N_EXCLUDE_DIR,&exclude_dir_pattern, "exclude-dir=pattern","exclude matching directories when recursing" }, |
| { OP_STRING, N_INCLUDE_DIR,&include_dir_pattern, "include-dir=pattern","include matching directories when recursing" }, |
| |
| /* These two were accidentally implemented with underscores instead of |
| hyphens in the option names. As this was not discovered for several releases, |
| the incorrect versions are left in the table for compatibility. However, the |
| --help function misses out any option that has an underscore in its name. */ |
| |
| { OP_STRING, N_EXCLUDE_DIR,&exclude_dir_pattern, "exclude_dir=pattern","exclude matching directories when recursing" }, |
| { OP_STRING, N_INCLUDE_DIR,&include_dir_pattern, "include_dir=pattern","include matching directories when recursing" }, |
| |
| #ifdef JFRIEDL_DEBUG |
| { OP_OP_NUMBER, 'S', &S_arg, "jeffS", "replace matched (sub)string with X" }, |
| #endif |
| { OP_NODATA, 's', NULL, "no-messages", "suppress error messages" }, |
| { OP_NODATA, 'u', NULL, "utf-8", "use UTF-8 mode" }, |
| { OP_NODATA, 'V', NULL, "version", "print version information and exit" }, |
| { OP_NODATA, 'v', NULL, "invert-match", "select non-matching lines" }, |
| { OP_NODATA, 'w', NULL, "word-regex(p)", "force patterns to match only as words" }, |
| { OP_NODATA, 'x', NULL, "line-regex(p)", "force patterns to match only whole lines" }, |
| { OP_NODATA, 0, NULL, NULL, NULL } |
| }; |
| |
| /* Tables for prefixing and suffixing patterns, according to the -w, -x, and -F |
| options. These set the 1, 2, and 4 bits in process_options, respectively. Note |
| that the combination of -w and -x has the same effect as -x on its own, so we |
| can treat them as the same. */ |
| |
| static const char *prefix[] = { |
| "", "\\b", "^(?:", "^(?:", "\\Q", "\\b\\Q", "^(?:\\Q", "^(?:\\Q" }; |
| |
| static const char *suffix[] = { |
| "", "\\b", ")$", ")$", "\\E", "\\E\\b", "\\E)$", "\\E)$" }; |
| |
| /* UTF-8 tables - used only when the newline setting is "any". */ |
| |
| const int utf8_table3[] = { 0xff, 0x1f, 0x0f, 0x07, 0x03, 0x01}; |
| |
| const char utf8_table4[] = { |
| 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, |
| 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, |
| 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, |
| 3,3,3,3,3,3,3,3,4,4,4,4,5,5,5,5 }; |
| |
| |
| |
| /************************************************* |
| * Exit from the program * |
| *************************************************/ |
| |
| /* If there has been a resource error, give a suitable message. |
| |
| Argument: the return code |
| Returns: does not return |
| */ |
| |
| static void |
| pcregrep_exit(int rc) |
| { |
| if (resource_error) |
| { |
| fprintf(stderr, "pcregrep: Error %d, %d or %d means that a resource limit " |
| "was exceeded.\n", PCRE_ERROR_MATCHLIMIT, PCRE_ERROR_RECURSIONLIMIT, |
| PCRE_ERROR_JIT_STACKLIMIT); |
| fprintf(stderr, "pcregrep: Check your regex for nested unlimited loops.\n"); |
| } |
| |
| exit(rc); |
| } |
| |
| |
| /************************************************* |
| * OS-specific functions * |
| *************************************************/ |
| |
| /* These functions are defined so that they can be made system specific, |
| although at present the only ones are for Unix, Win32, and for "no support". */ |
| |
| |
| /************* Directory scanning in Unix ***********/ |
| |
| #if defined HAVE_SYS_STAT_H && defined HAVE_DIRENT_H && defined HAVE_SYS_TYPES_H |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <dirent.h> |
| |
| typedef DIR directory_type; |
| |
| static int |
| isdirectory(char *filename) |
| { |
| struct stat statbuf; |
| if (stat(filename, &statbuf) < 0) |
| return 0; /* In the expectation that opening as a file will fail */ |
| return ((statbuf.st_mode & S_IFMT) == S_IFDIR)? '/' : 0; |
| } |
| |
| static directory_type * |
| opendirectory(char *filename) |
| { |
| return opendir(filename); |
| } |
| |
| static char * |
| readdirectory(directory_type *dir) |
| { |
| for (;;) |
| { |
| struct dirent *dent = readdir(dir); |
| if (dent == NULL) return NULL; |
| if (strcmp(dent->d_name, ".") != 0 && strcmp(dent->d_name, "..") != 0) |
| return dent->d_name; |
| } |
| /* Control never reaches here */ |
| } |
| |
| static void |
| closedirectory(directory_type *dir) |
| { |
| closedir(dir); |
| } |
| |
| |
| /************* Test for regular file in Unix **********/ |
| |
| static int |
| isregfile(char *filename) |
| { |
| struct stat statbuf; |
| if (stat(filename, &statbuf) < 0) |
| return 1; /* In the expectation that opening as a file will fail */ |
| return (statbuf.st_mode & S_IFMT) == S_IFREG; |
| } |
| |
| |
| /************* Test for a terminal in Unix **********/ |
| |
| static BOOL |
| is_stdout_tty(void) |
| { |
| return isatty(fileno(stdout)); |
| } |
| |
| static BOOL |
| is_file_tty(FILE *f) |
| { |
| return isatty(fileno(f)); |
| } |
| |
| |
| /************* Directory scanning in Win32 ***********/ |
| |
| /* I (Philip Hazel) have no means of testing this code. It was contributed by |
| Lionel Fourquaux. David Burgess added a patch to define INVALID_FILE_ATTRIBUTES |
| when it did not exist. David Byron added a patch that moved the #include of |
| <windows.h> to before the INVALID_FILE_ATTRIBUTES definition rather than after. |
| The double test below stops gcc 4.4.4 grumbling that HAVE_WINDOWS_H is |
| undefined when it is indeed undefined. */ |
| |
| #elif defined HAVE_WINDOWS_H && HAVE_WINDOWS_H |
| |
| #ifndef STRICT |
| # define STRICT |
| #endif |
| #ifndef WIN32_LEAN_AND_MEAN |
| # define WIN32_LEAN_AND_MEAN |
| #endif |
| |
| #include <windows.h> |
| |
| #ifndef INVALID_FILE_ATTRIBUTES |
| #define INVALID_FILE_ATTRIBUTES 0xFFFFFFFF |
| #endif |
| |
| typedef struct directory_type |
| { |
| HANDLE handle; |
| BOOL first; |
| WIN32_FIND_DATA data; |
| } directory_type; |
| |
| int |
| isdirectory(char *filename) |
| { |
| DWORD attr = GetFileAttributes(filename); |
| if (attr == INVALID_FILE_ATTRIBUTES) |
| return 0; |
| return ((attr & FILE_ATTRIBUTE_DIRECTORY) != 0) ? '/' : 0; |
| } |
| |
| directory_type * |
| opendirectory(char *filename) |
| { |
| size_t len; |
| char *pattern; |
| directory_type *dir; |
| DWORD err; |
| len = strlen(filename); |
| pattern = (char *) malloc(len + 3); |
| dir = (directory_type *) malloc(sizeof(*dir)); |
| if ((pattern == NULL) || (dir == NULL)) |
| { |
| fprintf(stderr, "pcregrep: malloc failed\n"); |
| pcregrep_exit(2); |
| } |
| memcpy(pattern, filename, len); |
| memcpy(&(pattern[len]), "\\*", 3); |
| dir->handle = FindFirstFile(pattern, &(dir->data)); |
| if (dir->handle != INVALID_HANDLE_VALUE) |
| { |
| free(pattern); |
| dir->first = TRUE; |
| return dir; |
| } |
| err = GetLastError(); |
| free(pattern); |
| free(dir); |
| errno = (err == ERROR_ACCESS_DENIED) ? EACCES : ENOENT; |
| return NULL; |
| } |
| |
| char * |
| readdirectory(directory_type *dir) |
| { |
| for (;;) |
| { |
| if (!dir->first) |
| { |
| if (!FindNextFile(dir->handle, &(dir->data))) |
| return NULL; |
| } |
| else |
| { |
| dir->first = FALSE; |
| } |
| if (strcmp(dir->data.cFileName, ".") != 0 && strcmp(dir->data.cFileName, "..") != 0) |
| return dir->data.cFileName; |
| } |
| #ifndef _MSC_VER |
| return NULL; /* Keep compiler happy; never executed */ |
| #endif |
| } |
| |
| void |
| closedirectory(directory_type *dir) |
| { |
| FindClose(dir->handle); |
| free(dir); |
| } |
| |
| |
| /************* Test for regular file in Win32 **********/ |
| |
| /* I don't know how to do this, or if it can be done; assume all paths are |
| regular if they are not directories. */ |
| |
| int isregfile(char *filename) |
| { |
| return !isdirectory(filename); |
| } |
| |
| |
| /************* Test for a terminal in Win32 **********/ |
| |
| /* I don't know how to do this; assume never */ |
| |
| static BOOL |
| is_stdout_tty(void) |
| { |
| return FALSE; |
| } |
| |
| static BOOL |
| is_file_tty(FILE *f) |
| { |
| return FALSE; |
| } |
| |
| |
| /************* Directory scanning when we can't do it ***********/ |
| |
| /* The type is void, and apart from isdirectory(), the functions do nothing. */ |
| |
| #else |
| |
| typedef void directory_type; |
| |
| int isdirectory(char *filename) { return 0; } |
| directory_type * opendirectory(char *filename) { return (directory_type*)0;} |
| char *readdirectory(directory_type *dir) { return (char*)0;} |
| void closedirectory(directory_type *dir) {} |
| |
| |
| /************* Test for regular when we can't do it **********/ |
| |
| /* Assume all files are regular. */ |
| |
| int isregfile(char *filename) { return 1; } |
| |
| |
| /************* Test for a terminal when we can't do it **********/ |
| |
| static BOOL |
| is_stdout_tty(void) |
| { |
| return FALSE; |
| } |
| |
| static BOOL |
| is_file_tty(FILE *f) |
| { |
| return FALSE; |
| } |
| |
| #endif |
| |
| |
| |
| #ifndef HAVE_STRERROR |
| /************************************************* |
| * Provide strerror() for non-ANSI libraries * |
| *************************************************/ |
| |
| /* Some old-fashioned systems still around (e.g. SunOS4) don't have strerror() |
| in their libraries, but can provide the same facility by this simple |
| alternative function. */ |
| |
| extern int sys_nerr; |
| extern char *sys_errlist[]; |
| |
| char * |
| strerror(int n) |
| { |
| if (n < 0 || n >= sys_nerr) return "unknown error number"; |
| return sys_errlist[n]; |
| } |
| #endif /* HAVE_STRERROR */ |
| |
| |
| |
| /************************************************* |
| * Read one line of input * |
| *************************************************/ |
| |
| /* Normally, input is read using fread() into a large buffer, so many lines may |
| be read at once. However, doing this for tty input means that no output appears |
| until a lot of input has been typed. Instead, tty input is handled line by |
| line. We cannot use fgets() for this, because it does not stop at a binary |
| zero, and therefore there is no way of telling how many characters it has read, |
| because there may be binary zeros embedded in the data. |
| |
| Arguments: |
| buffer the buffer to read into |
| length the maximum number of characters to read |
| f the file |
| |
| Returns: the number of characters read, zero at end of file |
| */ |
| |
| static int |
| read_one_line(char *buffer, int length, FILE *f) |
| { |
| int c; |
| int yield = 0; |
| while ((c = fgetc(f)) != EOF) |
| { |
| buffer[yield++] = c; |
| if (c == '\n' || yield >= length) break; |
| } |
| return yield; |
| } |
| |
| |
| |
| /************************************************* |
| * Find end of line * |
| *************************************************/ |
| |
| /* The length of the endline sequence that is found is set via lenptr. This may |
| be zero at the very end of the file if there is no line-ending sequence there. |
| |
| Arguments: |
| p current position in line |
| endptr end of available data |
| lenptr where to put the length of the eol sequence |
| |
| Returns: pointer after the last byte of the line, |
| including the newline byte(s) |
| */ |
| |
| static char * |
| end_of_line(char *p, char *endptr, int *lenptr) |
| { |
| switch(endlinetype) |
| { |
| default: /* Just in case */ |
| case EL_LF: |
| while (p < endptr && *p != '\n') p++; |
| if (p < endptr) |
| { |
| *lenptr = 1; |
| return p + 1; |
| } |
| *lenptr = 0; |
| return endptr; |
| |
| case EL_CR: |
| while (p < endptr && *p != '\r') p++; |
| if (p < endptr) |
| { |
| *lenptr = 1; |
| return p + 1; |
| } |
| *lenptr = 0; |
| return endptr; |
| |
| case EL_CRLF: |
| for (;;) |
| { |
| while (p < endptr && *p != '\r') p++; |
| if (++p >= endptr) |
| { |
| *lenptr = 0; |
| return endptr; |
| } |
| if (*p == '\n') |
| { |
| *lenptr = 2; |
| return p + 1; |
| } |
| } |
| break; |
| |
| case EL_ANYCRLF: |
| while (p < endptr) |
| { |
| int extra = 0; |
| register int c = *((unsigned char *)p); |
| |
| if (utf8 && c >= 0xc0) |
| { |
| int gcii, gcss; |
| extra = utf8_table4[c & 0x3f]; /* Number of additional bytes */ |
| gcss = 6*extra; |
| c = (c & utf8_table3[extra]) << gcss; |
| for (gcii = 1; gcii <= extra; gcii++) |
| { |
| gcss -= 6; |
| c |= (p[gcii] & 0x3f) << gcss; |
| } |
| } |
| |
| p += 1 + extra; |
| |
| switch (c) |
| { |
| case 0x0a: /* LF */ |
| *lenptr = 1; |
| return p; |
| |
| case 0x0d: /* CR */ |
| if (p < endptr && *p == 0x0a) |
| { |
| *lenptr = 2; |
| p++; |
| } |
| else *lenptr = 1; |
| return p; |
| |
| default: |
| break; |
| } |
| } /* End of loop for ANYCRLF case */ |
| |
| *lenptr = 0; /* Must have hit the end */ |
| return endptr; |
| |
| case EL_ANY: |
| while (p < endptr) |
| { |
| int extra = 0; |
| register int c = *((unsigned char *)p); |
| |
| if (utf8 && c >= 0xc0) |
| { |
| int gcii, gcss; |
| extra = utf8_table4[c & 0x3f]; /* Number of additional bytes */ |
| gcss = 6*extra; |
| c = (c & utf8_table3[extra]) << gcss; |
| for (gcii = 1; gcii <= extra; gcii++) |
| { |
| gcss -= 6; |
| c |= (p[gcii] & 0x3f) << gcss; |
| } |
| } |
| |
| p += 1 + extra; |
| |
| switch (c) |
| { |
| case 0x0a: /* LF */ |
| case 0x0b: /* VT */ |
| case 0x0c: /* FF */ |
| *lenptr = 1; |
| return p; |
| |
| case 0x0d: /* CR */ |
| if (p < endptr && *p == 0x0a) |
| { |
| *lenptr = 2; |
| p++; |
| } |
| else *lenptr = 1; |
| return p; |
| |
| case 0x85: /* NEL */ |
| *lenptr = utf8? 2 : 1; |
| return p; |
| |
| case 0x2028: /* LS */ |
| case 0x2029: /* PS */ |
| *lenptr = 3; |
| return p; |
| |
| default: |
| break; |
| } |
| } /* End of loop for ANY case */ |
| |
| *lenptr = 0; /* Must have hit the end */ |
| return endptr; |
| } /* End of overall switch */ |
| } |
| |
| |
| |
| /************************************************* |
| * Find start of previous line * |
| *************************************************/ |
| |
| /* This is called when looking back for before lines to print. |
| |
| Arguments: |
| p start of the subsequent line |
| startptr start of available data |
| |
| Returns: pointer to the start of the previous line |
| */ |
| |
| static char * |
| previous_line(char *p, char *startptr) |
| { |
| switch(endlinetype) |
| { |
| default: /* Just in case */ |
| case EL_LF: |
| p--; |
| while (p > startptr && p[-1] != '\n') p--; |
| return p; |
| |
| case EL_CR: |
| p--; |
| while (p > startptr && p[-1] != '\n') p--; |
| return p; |
| |
| case EL_CRLF: |
| for (;;) |
| { |
| p -= 2; |
| while (p > startptr && p[-1] != '\n') p--; |
| if (p <= startptr + 1 || p[-2] == '\r') return p; |
| } |
| return p; /* But control should never get here */ |
| |
| case EL_ANY: |
| case EL_ANYCRLF: |
| if (*(--p) == '\n' && p > startptr && p[-1] == '\r') p--; |
| if (utf8) while ((*p & 0xc0) == 0x80) p--; |
| |
| while (p > startptr) |
| { |
| register int c; |
| char *pp = p - 1; |
| |
| if (utf8) |
| { |
| int extra = 0; |
| while ((*pp & 0xc0) == 0x80) pp--; |
| c = *((unsigned char *)pp); |
| if (c >= 0xc0) |
| { |
| int gcii, gcss; |
| extra = utf8_table4[c & 0x3f]; /* Number of additional bytes */ |
| gcss = 6*extra; |
| c = (c & utf8_table3[extra]) << gcss; |
| for (gcii = 1; gcii <= extra; gcii++) |
| { |
| gcss -= 6; |
| c |= (pp[gcii] & 0x3f) << gcss; |
| } |
| } |
| } |
| else c = *((unsigned char *)pp); |
| |
| if (endlinetype == EL_ANYCRLF) switch (c) |
| { |
| case 0x0a: /* LF */ |
| case 0x0d: /* CR */ |
| return p; |
| |
| default: |
| break; |
| } |
| |
| else switch (c) |
| { |
| case 0x0a: /* LF */ |
| case 0x0b: /* VT */ |
| case 0x0c: /* FF */ |
| case 0x0d: /* CR */ |
| case 0x85: /* NEL */ |
| case 0x2028: /* LS */ |
| case 0x2029: /* PS */ |
| return p; |
| |
| default: |
| break; |
| } |
| |
| p = pp; /* Back one character */ |
| } /* End of loop for ANY case */ |
| |
| return startptr; /* Hit start of data */ |
| } /* End of overall switch */ |
| } |
| |
| |
| |
| |
| |
| /************************************************* |
| * Print the previous "after" lines * |
| *************************************************/ |
| |
| /* This is called if we are about to lose said lines because of buffer filling, |
| and at the end of the file. The data in the line is written using fwrite() so |
| that a binary zero does not terminate it. |
| |
| Arguments: |
| lastmatchnumber the number of the last matching line, plus one |
| lastmatchrestart where we restarted after the last match |
| endptr end of available data |
| printname filename for printing |
| |
| Returns: nothing |
| */ |
| |
| static void do_after_lines(int lastmatchnumber, char *lastmatchrestart, |
| char *endptr, char *printname) |
| { |
| if (after_context > 0 && lastmatchnumber > 0) |
| { |
| int count = 0; |
| while (lastmatchrestart < endptr && count++ < after_context) |
| { |
| int ellength; |
| char *pp = lastmatchrestart; |
| if (printname != NULL) fprintf(stdout, "%s-", printname); |
| if (number) fprintf(stdout, "%d-", lastmatchnumber++); |
| pp = end_of_line(pp, endptr, &ellength); |
| FWRITE(lastmatchrestart, 1, pp - lastmatchrestart, stdout); |
| lastmatchrestart = pp; |
| } |
| hyphenpending = TRUE; |
| } |
| } |
| |
| |
| |
| /************************************************* |
| * Apply patterns to subject till one matches * |
| *************************************************/ |
| |
| /* This function is called to run through all patterns, looking for a match. It |
| is used multiple times for the same subject when colouring is enabled, in order |
| to find all possible matches. |
| |
| Arguments: |
| matchptr the start of the subject |
| length the length of the subject to match |
| startoffset where to start matching |
| offsets the offets vector to fill in |
| mrc address of where to put the result of pcre_exec() |
| |
| Returns: TRUE if there was a match |
| FALSE if there was no match |
| invert if there was a non-fatal error |
| */ |
| |
| static BOOL |
| match_patterns(char *matchptr, size_t length, int startoffset, int *offsets, |
| int *mrc) |
| { |
| int i; |
| size_t slen = length; |
| const char *msg = "this text:\n\n"; |
| if (slen > 200) |
| { |
| slen = 200; |
| msg = "text that starts:\n\n"; |
| } |
| for (i = 0; i < pattern_count; i++) |
| { |
| *mrc = pcre_exec(pattern_list[i], hints_list[i], matchptr, (int)length, |
| startoffset, PCRE_NOTEMPTY, offsets, OFFSET_SIZE); |
| if (*mrc >= 0) return TRUE; |
| if (*mrc == PCRE_ERROR_NOMATCH) continue; |
| fprintf(stderr, "pcregrep: pcre_exec() gave error %d while matching ", *mrc); |
| if (pattern_count > 1) fprintf(stderr, "pattern number %d to ", i+1); |
| fprintf(stderr, "%s", msg); |
| FWRITE(matchptr, 1, slen, stderr); /* In case binary zero included */ |
| fprintf(stderr, "\n\n"); |
| if (*mrc == PCRE_ERROR_MATCHLIMIT || *mrc == PCRE_ERROR_RECURSIONLIMIT || |
| *mrc == PCRE_ERROR_JIT_STACKLIMIT) |
| resource_error = TRUE; |
| if (error_count++ > 20) |
| { |
| fprintf(stderr, "pcregrep: Too many errors - abandoned.\n"); |
| pcregrep_exit(2); |
| } |
| return invert; /* No more matching; don't show the line again */ |
| } |
| |
| return FALSE; /* No match, no errors */ |
| } |
| |
| |
| |
| /************************************************* |
| * Grep an individual file * |
| *************************************************/ |
| |
| /* This is called from grep_or_recurse() below. It uses a buffer that is three |
| times the value of bufthird. The matching point is never allowed to stray into |
| the top third of the buffer, thus keeping more of the file available for |
| context printing or for multiline scanning. For large files, the pointer will |
| be in the middle third most of the time, so the bottom third is available for |
| "before" context printing. |
| |
| Arguments: |
| handle the fopened FILE stream for a normal file |
| the gzFile pointer when reading is via libz |
| the BZFILE pointer when reading is via libbz2 |
| frtype FR_PLAIN, FR_LIBZ, or FR_LIBBZ2 |
| filename the file name or NULL (for errors) |
| printname the file name if it is to be printed for each match |
| or NULL if the file name is not to be printed |
| it cannot be NULL if filenames[_nomatch]_only is set |
| |
| Returns: 0 if there was at least one match |
| 1 otherwise (no matches) |
| 2 if an overlong line is encountered |
| 3 if there is a read error on a .bz2 file |
| */ |
| |
| static int |
| pcregrep(void *handle, int frtype, char *filename, char *printname) |
| { |
| int rc = 1; |
| int linenumber = 1; |
| int lastmatchnumber = 0; |
| int count = 0; |
| int filepos = 0; |
| int offsets[OFFSET_SIZE]; |
| char *lastmatchrestart = NULL; |
| char *ptr = main_buffer; |
| char *endptr; |
| size_t bufflength; |
| BOOL endhyphenpending = FALSE; |
| BOOL input_line_buffered = line_buffered; |
| FILE *in = NULL; /* Ensure initialized */ |
| |
| #ifdef SUPPORT_LIBZ |
| gzFile ingz = NULL; |
| #endif |
| |
| #ifdef SUPPORT_LIBBZ2 |
| BZFILE *inbz2 = NULL; |
| #endif |
| |
| |
| /* Do the first read into the start of the buffer and set up the pointer to end |
| of what we have. In the case of libz, a non-zipped .gz file will be read as a |
| plain file. However, if a .bz2 file isn't actually bzipped, the first read will |
| fail. */ |
| |
| #ifdef SUPPORT_LIBZ |
| if (frtype == FR_LIBZ) |
| { |
| ingz = (gzFile)handle; |
| bufflength = gzread (ingz, main_buffer, bufsize); |
| } |
| else |
| #endif |
| |
| #ifdef SUPPORT_LIBBZ2 |
| if (frtype == FR_LIBBZ2) |
| { |
| inbz2 = (BZFILE *)handle; |
| bufflength = BZ2_bzread(inbz2, main_buffer, bufsize); |
| if ((int)bufflength < 0) return 2; /* Gotcha: bufflength is size_t; */ |
| } /* without the cast it is unsigned. */ |
| else |
| #endif |
| |
| { |
| in = (FILE *)handle; |
| if (is_file_tty(in)) input_line_buffered = TRUE; |
| bufflength = input_line_buffered? |
| read_one_line(main_buffer, bufsize, in) : |
| fread(main_buffer, 1, bufsize, in); |
| } |
| |
| endptr = main_buffer + bufflength; |
| |
| /* Loop while the current pointer is not at the end of the file. For large |
| files, endptr will be at the end of the buffer when we are in the middle of the |
| file, but ptr will never get there, because as soon as it gets over 2/3 of the |
| way, the buffer is shifted left and re-filled. */ |
| |
| while (ptr < endptr) |
| { |
| int endlinelength; |
| int mrc = 0; |
| int startoffset = 0; |
| BOOL match; |
| char *matchptr = ptr; |
| char *t = ptr; |
| size_t length, linelength; |
| |
| /* At this point, ptr is at the start of a line. We need to find the length |
| of the subject string to pass to pcre_exec(). In multiline mode, it is the |
| length remainder of the data in the buffer. Otherwise, it is the length of |
| the next line, excluding the terminating newline. After matching, we always |
| advance by the length of the next line. In multiline mode the PCRE_FIRSTLINE |
| option is used for compiling, so that any match is constrained to be in the |
| first line. */ |
| |
| t = end_of_line(t, endptr, &endlinelength); |
| linelength = t - ptr - endlinelength; |
| length = multiline? (size_t)(endptr - ptr) : linelength; |
| |
| /* Check to see if the line we are looking at extends right to the very end |
| of the buffer without a line terminator. This means the line is too long to |
| handle. */ |
| |
| if (endlinelength == 0 && t == main_buffer + bufsize) |
| { |
| fprintf(stderr, "pcregrep: line %d%s%s is too long for the internal buffer\n" |
| "pcregrep: check the --buffer-size option\n", |
| linenumber, |
| (filename == NULL)? "" : " of file ", |
| (filename == NULL)? "" : filename); |
| return 2; |
| } |
| |
| /* Extra processing for Jeffrey Friedl's debugging. */ |
| |
| #ifdef JFRIEDL_DEBUG |
| if (jfriedl_XT || jfriedl_XR) |
| { |
| #include <sys/time.h> |
| #include <time.h> |
| struct timeval start_time, end_time; |
| struct timezone dummy; |
| int i; |
| |
| if (jfriedl_XT) |
| { |
| unsigned long newlen = length * jfriedl_XT + strlen(jfriedl_prefix) + strlen(jfriedl_postfix); |
| const char *orig = ptr; |
| ptr = malloc(newlen + 1); |
| if (!ptr) { |
| printf("out of memory"); |
| pcregrep_exit(2); |
| } |
| endptr = ptr; |
| strcpy(endptr, jfriedl_prefix); endptr += strlen(jfriedl_prefix); |
| for (i = 0; i < jfriedl_XT; i++) { |
| strncpy(endptr, orig, length); |
| endptr += length; |
| } |
| strcpy(endptr, jfriedl_postfix); endptr += strlen(jfriedl_postfix); |
| length = newlen; |
| } |
| |
| if (gettimeofday(&start_time, &dummy) != 0) |
| perror("bad gettimeofday"); |
| |
| |
| for (i = 0; i < jfriedl_XR; i++) |
| match = (pcre_exec(pattern_list[0], hints_list[0], ptr, length, 0, |
| PCRE_NOTEMPTY, offsets, OFFSET_SIZE) >= 0); |
| |
| if (gettimeofday(&end_time, &dummy) != 0) |
| perror("bad gettimeofday"); |
| |
| double delta = ((end_time.tv_sec + (end_time.tv_usec / 1000000.0)) |
| - |
| (start_time.tv_sec + (start_time.tv_usec / 1000000.0))); |
| |
| printf("%s TIMER[%.4f]\n", match ? "MATCH" : "FAIL", delta); |
| return 0; |
| } |
| #endif |
| |
| /* We come back here after a match when the -o option (only_matching) is set, |
| in order to find any further matches in the same line. */ |
| |
| ONLY_MATCHING_RESTART: |
| |
| /* Run through all the patterns until one matches or there is an error other |
| than NOMATCH. This code is in a subroutine so that it can be re-used for |
| finding subsequent matches when colouring matched lines. */ |
| |
| match = match_patterns(matchptr, length, startoffset, offsets, &mrc); |
| |
| /* If it's a match or a not-match (as required), do what's wanted. */ |
| |
| if (match != invert) |
| { |
| BOOL hyphenprinted = FALSE; |
| |
| /* We've failed if we want a file that doesn't have any matches. */ |
| |
| if (filenames == FN_NOMATCH_ONLY) return 1; |
| |
| /* Just count if just counting is wanted. */ |
| |
| if (count_only) count++; |
| |
| /* If all we want is a file name, there is no need to scan any more lines |
| in the file. */ |
| |
| else if (filenames == FN_MATCH_ONLY) |
| { |
| fprintf(stdout, "%s\n", printname); |
| return 0; |
| } |
| |
| /* Likewise, if all we want is a yes/no answer. */ |
| |
| else if (quiet) return 0; |
| |
| /* The --only-matching option prints just the substring that matched, or a |
| captured portion of it, as long as this string is not empty, and the |
| --file-offsets and --line-offsets options output offsets for the matching |
| substring (they both force --only-matching = 0). None of these options |
| prints any context. Afterwards, adjust the start and then jump back to look |
| for further matches in the same line. If we are in invert mode, however, |
| nothing is printed and we do not restart - this could still be useful |
| because the return code is set. */ |
| |
| else if (only_matching >= 0) |
| { |
| if (!invert) |
| { |
| if (printname != NULL) fprintf(stdout, "%s:", printname); |
| if (number) fprintf(stdout, "%d:", linenumber); |
| if (line_offsets) |
| fprintf(stdout, "%d,%d\n", (int)(matchptr + offsets[0] - ptr), |
| offsets[1] - offsets[0]); |
| else if (file_offsets) |
| fprintf(stdout, "%d,%d\n", |
| (int)(filepos + matchptr + offsets[0] - ptr), |
| offsets[1] - offsets[0]); |
| else if (only_matching < mrc) |
| { |
| int plen = offsets[2*only_matching + 1] - offsets[2*only_matching]; |
| if (plen > 0) |
| { |
| if (do_colour) fprintf(stdout, "%c[%sm", 0x1b, colour_string); |
| FWRITE(matchptr + offsets[only_matching*2], 1, plen, stdout); |
| if (do_colour) fprintf(stdout, "%c[00m", 0x1b); |
| fprintf(stdout, "\n"); |
| } |
| } |
| else if (printname != NULL || number) fprintf(stdout, "\n"); |
| match = FALSE; |
| if (line_buffered) fflush(stdout); |
| rc = 0; /* Had some success */ |
| startoffset = offsets[1]; /* Restart after the match */ |
| goto ONLY_MATCHING_RESTART; |
| } |
| } |
| |
| /* This is the default case when none of the above options is set. We print |
| the matching lines(s), possibly preceded and/or followed by other lines of |
| context. */ |
| |
| else |
| { |
| /* See if there is a requirement to print some "after" lines from a |
| previous match. We never print any overlaps. */ |
| |
| if (after_context > 0 && lastmatchnumber > 0) |
| { |
| int ellength; |
| int linecount = 0; |
| char *p = lastmatchrestart; |
| |
| while (p < ptr && linecount < after_context) |
| { |
| p = end_of_line(p, ptr, &ellength); |
| linecount++; |
| } |
| |
| /* It is important to advance lastmatchrestart during this printing so |
| that it interacts correctly with any "before" printing below. Print |
| each line's data using fwrite() in case there are binary zeroes. */ |
| |
| while (lastmatchrestart < p) |
| { |
| char *pp = lastmatchrestart; |
| if (printname != NULL) fprintf(stdout, "%s-", printname); |
| if (number) fprintf(stdout, "%d-", lastmatchnumber++); |
| pp = end_of_line(pp, endptr, &ellength); |
| FWRITE(lastmatchrestart, 1, pp - lastmatchrestart, stdout); |
| lastmatchrestart = pp; |
| } |
| if (lastmatchrestart != ptr) hyphenpending = TRUE; |
| } |
| |
| /* If there were non-contiguous lines printed above, insert hyphens. */ |
| |
| if (hyphenpending) |
| { |
| fprintf(stdout, "--\n"); |
| hyphenpending = FALSE; |
| hyphenprinted = TRUE; |
| } |
| |
| /* See if there is a requirement to print some "before" lines for this |
| match. Again, don't print overlaps. */ |
| |
| if (before_context > 0) |
| { |
| int linecount = 0; |
| char *p = ptr; |
| |
| while (p > main_buffer && (lastmatchnumber == 0 || p > lastmatchrestart) && |
| linecount < before_context) |
| { |
| linecount++; |
| p = previous_line(p, main_buffer); |
| } |
| |
| if (lastmatchnumber > 0 && p > lastmatchrestart && !hyphenprinted) |
| fprintf(stdout, "--\n"); |
| |
| while (p < ptr) |
| { |
| int ellength; |
| char *pp = p; |
| if (printname != NULL) fprintf(stdout, "%s-", printname); |
| if (number) fprintf(stdout, "%d-", linenumber - linecount--); |
| pp = end_of_line(pp, endptr, &ellength); |
| FWRITE(p, 1, pp - p, stdout); |
| p = pp; |
| } |
| } |
| |
| /* Now print the matching line(s); ensure we set hyphenpending at the end |
| of the file if any context lines are being output. */ |
| |
| if (after_context > 0 || before_context > 0) |
| endhyphenpending = TRUE; |
| |
| if (printname != NULL) fprintf(stdout, "%s:", printname); |
| if (number) fprintf(stdout, "%d:", linenumber); |
| |
| /* In multiline mode, we want to print to the end of the line in which |
| the end of the matched string is found, so we adjust linelength and the |
| line number appropriately, but only when there actually was a match |
| (invert not set). Because the PCRE_FIRSTLINE option is set, the start of |
| the match will always be before the first newline sequence. */ |
| |
| if (multiline & !invert) |
| { |
| char *endmatch = ptr + offsets[1]; |
| t = ptr; |
| while (t < endmatch) |
| { |
| t = end_of_line(t, endptr, &endlinelength); |
| if (t < endmatch) linenumber++; else break; |
| } |
| linelength = t - ptr - endlinelength; |
| } |
| |
| /*** NOTE: Use only fwrite() to output the data line, so that binary |
| zeroes are treated as just another data character. */ |
| |
| /* This extra option, for Jeffrey Friedl's debugging requirements, |
| replaces the matched string, or a specific captured string if it exists, |
| with X. When this happens, colouring is ignored. */ |
| |
| #ifdef JFRIEDL_DEBUG |
| if (S_arg >= 0 && S_arg < mrc) |
| { |
| int first = S_arg * 2; |
| int last = first + 1; |
| FWRITE(ptr, 1, offsets[first], stdout); |
| fprintf(stdout, "X"); |
| FWRITE(ptr + offsets[last], 1, linelength - offsets[last], stdout); |
| } |
| else |
| #endif |
| |
| /* We have to split the line(s) up if colouring, and search for further |
| matches, but not of course if the line is a non-match. */ |
| |
| if (do_colour && !invert) |
| { |
| int plength; |
| FWRITE(ptr, 1, offsets[0], stdout); |
| fprintf(stdout, "%c[%sm", 0x1b, colour_string); |
| FWRITE(ptr + offsets[0], 1, offsets[1] - offsets[0], stdout); |
| fprintf(stdout, "%c[00m", 0x1b); |
| for (;;) |
| { |
| startoffset = offsets[1]; |
| if (startoffset >= (int)linelength + endlinelength || |
| !match_patterns(matchptr, length, startoffset, offsets, &mrc)) |
| break; |
| FWRITE(matchptr + startoffset, 1, offsets[0] - startoffset, stdout); |
| fprintf(stdout, "%c[%sm", 0x1b, colour_string); |
| FWRITE(matchptr + offsets[0], 1, offsets[1] - offsets[0], stdout); |
| fprintf(stdout, "%c[00m", 0x1b); |
| } |
| |
| /* In multiline mode, we may have already printed the complete line |
| and its line-ending characters (if they matched the pattern), so there |
| may be no more to print. */ |
| |
| plength = (int)((linelength + endlinelength) - startoffset); |
| if (plength > 0) FWRITE(ptr + startoffset, 1, plength, stdout); |
| } |
| |
| /* Not colouring; no need to search for further matches */ |
| |
| else FWRITE(ptr, 1, linelength + endlinelength, stdout); |
| } |
| |
| /* End of doing what has to be done for a match. If --line-buffered was |
| given, flush the output. */ |
| |
| if (line_buffered) fflush(stdout); |
| rc = 0; /* Had some success */ |
| |
| /* Remember where the last match happened for after_context. We remember |
| where we are about to restart, and that line's number. */ |
| |
| lastmatchrestart = ptr + linelength + endlinelength; |
| lastmatchnumber = linenumber + 1; |
| } |
| |
| /* For a match in multiline inverted mode (which of course did not cause |
| anything to be printed), we have to move on to the end of the match before |
| proceeding. */ |
| |
| if (multiline && invert && match) |
| { |
| int ellength; |
| char *endmatch = ptr + offsets[1]; |
| t = ptr; |
| while (t < endmatch) |
| { |
| t = end_of_line(t, endptr, &ellength); |
| if (t <= endmatch) linenumber++; else break; |
| } |
| endmatch = end_of_line(endmatch, endptr, &ellength); |
| linelength = endmatch - ptr - ellength; |
| } |
| |
| /* Advance to after the newline and increment the line number. The file |
| offset to the current line is maintained in filepos. */ |
| |
| ptr += linelength + endlinelength; |
| filepos += (int)(linelength + endlinelength); |
| linenumber++; |
| |
| /* If input is line buffered, and the buffer is not yet full, read another |
| line and add it into the buffer. */ |
| |
| if (input_line_buffered && bufflength < (size_t)bufsize) |
| { |
| int add = read_one_line(ptr, bufsize - (int)(ptr - main_buffer), in); |
| bufflength += add; |
| endptr += add; |
| } |
| |
| /* If we haven't yet reached the end of the file (the buffer is full), and |
| the current point is in the top 1/3 of the buffer, slide the buffer down by |
| 1/3 and refill it. Before we do this, if some unprinted "after" lines are |
| about to be lost, print them. */ |
| |
| if (bufflength >= (size_t)bufsize && ptr > main_buffer + 2*bufthird) |
| { |
| if (after_context > 0 && |
| lastmatchnumber > 0 && |
| lastmatchrestart < main_buffer + bufthird) |
| { |
| do_after_lines(lastmatchnumber, lastmatchrestart, endptr, printname); |
| lastmatchnumber = 0; |
| } |
| |
| /* Now do the shuffle */ |
| |
| memmove(main_buffer, main_buffer + bufthird, 2*bufthird); |
| ptr -= bufthird; |
| |
| #ifdef SUPPORT_LIBZ |
| if (frtype == FR_LIBZ) |
| bufflength = 2*bufthird + |
| gzread (ingz, main_buffer + 2*bufthird, bufthird); |
| else |
| #endif |
| |
| #ifdef SUPPORT_LIBBZ2 |
| if (frtype == FR_LIBBZ2) |
| bufflength = 2*bufthird + |
| BZ2_bzread(inbz2, main_buffer + 2*bufthird, bufthird); |
| else |
| #endif |
| |
| bufflength = 2*bufthird + |
| (input_line_buffered? |
| read_one_line(main_buffer + 2*bufthird, bufthird, in) : |
| fread(main_buffer + 2*bufthird, 1, bufthird, in)); |
| endptr = main_buffer + bufflength; |
| |
| /* Adjust any last match point */ |
| |
| if (lastmatchnumber > 0) lastmatchrestart -= bufthird; |
| } |
| } /* Loop through the whole file */ |
| |
| /* End of file; print final "after" lines if wanted; do_after_lines sets |
| hyphenpending if it prints something. */ |
| |
| if (only_matching < 0 && !count_only) |
| { |
| do_after_lines(lastmatchnumber, lastmatchrestart, endptr, printname); |
| hyphenpending |= endhyphenpending; |
| } |
| |
| /* Print the file name if we are looking for those without matches and there |
| were none. If we found a match, we won't have got this far. */ |
| |
| if (filenames == FN_NOMATCH_ONLY) |
| { |
| fprintf(stdout, "%s\n", printname); |
| return 0; |
| } |
| |
| /* Print the match count if wanted */ |
| |
| if (count_only) |
| { |
| if (count > 0 || !omit_zero_count) |
| { |
| if (printname != NULL && filenames != FN_NONE) |
| fprintf(stdout, "%s:", printname); |
| fprintf(stdout, "%d\n", count); |
| } |
| } |
| |
| return rc; |
| } |
| |
| |
| |
| /************************************************* |
| * Grep a file or recurse into a directory * |
| *************************************************/ |
| |
| /* Given a path name, if it's a directory, scan all the files if we are |
| recursing; if it's a file, grep it. |
| |
| Arguments: |
| pathname the path to investigate |
| dir_recurse TRUE if recursing is wanted (-r or -drecurse) |
| only_one_at_top TRUE if the path is the only one at toplevel |
| |
| Returns: 0 if there was at least one match |
| 1 if there were no matches |
| 2 there was some kind of error |
| |
| However, file opening failures are suppressed if "silent" is set. |
| */ |
| |
| static int |
| grep_or_recurse(char *pathname, BOOL dir_recurse, BOOL only_one_at_top) |
| { |
| int rc = 1; |
| int sep; |
| int frtype; |
| int pathlen; |
| void *handle; |
| FILE *in = NULL; /* Ensure initialized */ |
| |
| #ifdef SUPPORT_LIBZ |
| gzFile ingz = NULL; |
| #endif |
| |
| #ifdef SUPPORT_LIBBZ2 |
| BZFILE *inbz2 = NULL; |
| #endif |
| |
| /* If the file name is "-" we scan stdin */ |
| |
| if (strcmp(pathname, "-") == 0) |
| { |
| return pcregrep(stdin, FR_PLAIN, stdin_name, |
| (filenames > FN_DEFAULT || (filenames == FN_DEFAULT && !only_one_at_top))? |
| stdin_name : NULL); |
| } |
| |
| /* If the file is a directory, skip if skipping or if we are recursing, scan |
| each file and directory within it, subject to any include or exclude patterns |
| that were set. The scanning code is localized so it can be made |
| system-specific. */ |
| |
| if ((sep = isdirectory(pathname)) != 0) |
| { |
| if (dee_action == dee_SKIP) return 1; |
| if (dee_action == dee_RECURSE) |
| { |
| char buffer[1024]; |
| char *nextfile; |
| directory_type *dir = opendirectory(pathname); |
| |
| if (dir == NULL) |
| { |
| if (!silent) |
| fprintf(stderr, "pcregrep: Failed to open directory %s: %s\n", pathname, |
| strerror(errno)); |
| return 2; |
| } |
| |
| while ((nextfile = readdirectory(dir)) != NULL) |
| { |
| int frc, nflen; |
| sprintf(buffer, "%.512s%c%.128s", pathname, sep, nextfile); |
| nflen = (int)(strlen(nextfile)); |
| |
| if (isdirectory(buffer)) |
| { |
| if (exclude_dir_compiled != NULL && |
| pcre_exec(exclude_dir_compiled, NULL, nextfile, nflen, 0, 0, NULL, 0) >= 0) |
| continue; |
| |
| if (include_dir_compiled != NULL && |
| pcre_exec(include_dir_compiled, NULL, nextfile, nflen, 0, 0, NULL, 0) < 0) |
| continue; |
| } |
| else |
| { |
| if (exclude_compiled != NULL && |
| pcre_exec(exclude_compiled, NULL, nextfile, nflen, 0, 0, NULL, 0) >= 0) |
| continue; |
| |
| if (include_compiled != NULL && |
| pcre_exec(include_compiled, NULL, nextfile, nflen, 0, 0, NULL, 0) < 0) |
| continue; |
| } |
| |
| frc = grep_or_recurse(buffer, dir_recurse, FALSE); |
| if (frc > 1) rc = frc; |
| else if (frc == 0 && rc == 1) rc = 0; |
| } |
| |
| closedirectory(dir); |
| return rc; |
| } |
| } |
| |
| /* If the file is not a directory and not a regular file, skip it if that's |
| been requested. */ |
| |
| else if (!isregfile(pathname) && DEE_action == DEE_SKIP) return 1; |
| |
| /* Control reaches here if we have a regular file, or if we have a directory |
| and recursion or skipping was not requested, or if we have anything else and |
| skipping was not requested. The scan proceeds. If this is the first and only |
| argument at top level, we don't show the file name, unless we are only showing |
| the file name, or the filename was forced (-H). */ |
| |
| pathlen = (int)(strlen(pathname)); |
| |
| /* Open using zlib if it is supported and the file name ends with .gz. */ |
| |
| #ifdef SUPPORT_LIBZ |
| if (pathlen > 3 && strcmp(pathname + pathlen - 3, ".gz") == 0) |
| { |
| ingz = gzopen(pathname, "rb"); |
| if (ingz == NULL) |
| { |
| if (!silent) |
| fprintf(stderr, "pcregrep: Failed to open %s: %s\n", pathname, |
| strerror(errno)); |
| return 2; |
| } |
| handle = (void *)ingz; |
| frtype = FR_LIBZ; |
| } |
| else |
| #endif |
| |
| /* Otherwise open with bz2lib if it is supported and the name ends with .bz2. */ |
| |
| #ifdef SUPPORT_LIBBZ2 |
| if (pathlen > 4 && strcmp(pathname + pathlen - 4, ".bz2") == 0) |
| { |
| inbz2 = BZ2_bzopen(pathname, "rb"); |
| handle = (void *)inbz2; |
| frtype = FR_LIBBZ2; |
| } |
| else |
| #endif |
| |
| /* Otherwise use plain fopen(). The label is so that we can come back here if |
| an attempt to read a .bz2 file indicates that it really is a plain file. */ |
| |
| #ifdef SUPPORT_LIBBZ2 |
| PLAIN_FILE: |
| #endif |
| { |
| in = fopen(pathname, "rb"); |
| handle = (void *)in; |
| frtype = FR_PLAIN; |
| } |
| |
| /* All the opening methods return errno when they fail. */ |
| |
| if (handle == NULL) |
| { |
| if (!silent) |
| fprintf(stderr, "pcregrep: Failed to open %s: %s\n", pathname, |
| strerror(errno)); |
| return 2; |
| } |
| |
| /* Now grep the file */ |
| |
| rc = pcregrep(handle, frtype, pathname, (filenames > FN_DEFAULT || |
| (filenames == FN_DEFAULT && !only_one_at_top))? pathname : NULL); |
| |
| /* Close in an appropriate manner. */ |
| |
| #ifdef SUPPORT_LIBZ |
| if (frtype == FR_LIBZ) |
| gzclose(ingz); |
| else |
| #endif |
| |
| /* If it is a .bz2 file and the result is 3, it means that the first attempt to |
| read failed. If the error indicates that the file isn't in fact bzipped, try |
| again as a normal file. */ |
| |
| #ifdef SUPPORT_LIBBZ2 |
| if (frtype == FR_LIBBZ2) |
| { |
| if (rc == 3) |
| { |
| int errnum; |
| const char *err = BZ2_bzerror(inbz2, &errnum); |
| if (errnum == BZ_DATA_ERROR_MAGIC) |
| { |
| BZ2_bzclose(inbz2); |
| goto PLAIN_FILE; |
| } |
| else if (!silent) |
| fprintf(stderr, "pcregrep: Failed to read %s using bzlib: %s\n", |
| pathname, err); |
| rc = 2; /* The normal "something went wrong" code */ |
| } |
| BZ2_bzclose(inbz2); |
| } |
| else |
| #endif |
| |
| /* Normal file close */ |
| |
| fclose(in); |
| |
| /* Pass back the yield from pcregrep(). */ |
| |
| return rc; |
| } |
| |
| |
| |
| |
| /************************************************* |
| * Usage function * |
| *************************************************/ |
| |
| static int |
| usage(int rc) |
| { |
| option_item *op; |
| fprintf(stderr, "Usage: pcregrep [-"); |
| for (op = optionlist; op->one_char != 0; op++) |
| { |
| if (op->one_char > 0) fprintf(stderr, "%c", op->one_char); |
| } |
| fprintf(stderr, "] [long options] [pattern] [files]\n"); |
| fprintf(stderr, "Type `pcregrep --help' for more information and the long " |
| "options.\n"); |
| return rc; |
| } |
| |
| |
| |
| |
| /************************************************* |
| * Help function * |
| *************************************************/ |
| |
| static void |
| help(void) |
| { |
| option_item *op; |
| |
| printf("Usage: pcregrep [OPTION]... [PATTERN] [FILE1 FILE2 ...]\n"); |
| printf("Search for PATTERN in each FILE or standard input.\n"); |
| printf("PATTERN must be present if neither -e nor -f is used.\n"); |
| printf("\"-\" can be used as a file name to mean STDIN.\n"); |
| |
| #ifdef SUPPORT_LIBZ |
| printf("Files whose names end in .gz are read using zlib.\n"); |
| #endif |
| |
| #ifdef SUPPORT_LIBBZ2 |
| printf("Files whose names end in .bz2 are read using bzlib2.\n"); |
| #endif |
| |
| #if defined SUPPORT_LIBZ || defined SUPPORT_LIBBZ2 |
| printf("Other files and the standard input are read as plain files.\n\n"); |
| #else |
| printf("All files are read as plain files, without any interpretation.\n\n"); |
| #endif |
| |
| printf("Example: pcregrep -i 'hello.*world' menu.h main.c\n\n"); |
| printf("Options:\n"); |
| |
| for (op = optionlist; op->one_char != 0; op++) |
| { |
| int n; |
| char s[4]; |
| |
| /* Two options were accidentally implemented and documented with underscores |
| instead of hyphens in their names, something that was not noticed for quite a |
| few releases. When fixing this, I left the underscored versions in the list |
| in case people were using them. However, we don't want to display them in the |
| help data. There are no other options that contain underscores, and we do not |
| expect ever to implement such options. Therefore, just omit any option that |
| contains an underscore. */ |
| |
| if (strchr(op->long_name, '_') != NULL) continue; |
| |
| if (op->one_char > 0) sprintf(s, "-%c,", op->one_char); else strcpy(s, " "); |
| n = 31 - printf(" %s --%s", s, op->long_name); |
| if (n < 1) n = 1; |
| printf("%.*s%s\n", n, " ", op->help_text); |
| } |
| |
| printf("\nNumbers may be followed by K or M, e.g. --buffer-size=100K.\n"); |
| printf("The default value for --buffer-size is %d.\n", PCREGREP_BUFSIZE); |
| printf("When reading patterns from a file instead of using a command line option,\n"); |
| printf("trailing white space is removed and blank lines are ignored.\n"); |
| printf("There is a maximum of %d patterns, each of maximum size %d bytes.\n", |
| MAX_PATTERN_COUNT, PATBUFSIZE); |
| |
| printf("\nWith no FILEs, read standard input. If fewer than two FILEs given, assume -h.\n"); |
| printf("Exit status is 0 if any matches, 1 if no matches, and 2 if trouble.\n"); |
| } |
| |
| |
| |
| |
| /************************************************* |
| * Handle a single-letter, no data option * |
| *************************************************/ |
| |
| static int |
| handle_option(int letter, int options) |
| { |
| switch(letter) |
| { |
| case N_FOFFSETS: file_offsets = TRUE; break; |
| case N_HELP: help(); pcregrep_exit(0); |
| case N_LBUFFER: line_buffered = TRUE; break; |
| case N_LOFFSETS: line_offsets = number = TRUE; break; |
| case N_NOJIT: study_options &= ~PCRE_STUDY_JIT_COMPILE; break; |
| case 'c': count_only = TRUE; break; |
| case 'F': process_options |= PO_FIXED_STRINGS; break; |
| case 'H': filenames = FN_FORCE; break; |
| case 'h': filenames = FN_NONE; break; |
| case 'i': options |= PCRE_CASELESS; break; |
| case 'l': omit_zero_count = TRUE; filenames = FN_MATCH_ONLY; break; |
| case 'L': filenames = FN_NOMATCH_ONLY; break; |
| case 'M': multiline = TRUE; options |= PCRE_MULTILINE|PCRE_FIRSTLINE; break; |
| case 'n': number = TRUE; break; |
| case 'o': only_matching = 0; break; |
| case 'q': quiet = TRUE; break; |
| case 'r': dee_action = dee_RECURSE; break; |
| case 's': silent = TRUE; break; |
| case 'u': options |= PCRE_UTF8; utf8 = TRUE; break; |
| case 'v': invert = TRUE; break; |
| case 'w': process_options |= PO_WORD_MATCH; break; |
| case 'x': process_options |= PO_LINE_MATCH; break; |
| |
| case 'V': |
| fprintf(stderr, "pcregrep version %s\n", pcre_version()); |
| pcregrep_exit(0); |
| break; |
| |
| default: |
| fprintf(stderr, "pcregrep: Unknown option -%c\n", letter); |
| pcregrep_exit(usage(2)); |
| } |
| |
| return options; |
| } |
| |
| |
| |
| |
| /************************************************* |
| * Construct printed ordinal * |
| *************************************************/ |
| |
| /* This turns a number into "1st", "3rd", etc. */ |
| |
| static char * |
| ordin(int n) |
| { |
| static char buffer[8]; |
| char *p = buffer; |
| sprintf(p, "%d", n); |
| while (*p != 0) p++; |
| switch (n%10) |
| { |
| case 1: strcpy(p, "st"); break; |
| case 2: strcpy(p, "nd"); break; |
| case 3: strcpy(p, "rd"); break; |
| default: strcpy(p, "th"); break; |
| } |
| return buffer; |
| } |
| |
| |
| |
| /************************************************* |
| * Compile a single pattern * |
| *************************************************/ |
| |
| /* When the -F option has been used, this is called for each substring. |
| Otherwise it's called for each supplied pattern. |
| |
| Arguments: |
| pattern the pattern string |
| options the PCRE options |
| filename the file name, or NULL for a command-line pattern |
| count 0 if this is the only command line pattern, or |
| number of the command line pattern, or |
| linenumber for a pattern from a file |
| |
| Returns: TRUE on success, FALSE after an error |
| */ |
| |
| static BOOL |
| compile_single_pattern(char *pattern, int options, char *filename, int count) |
| { |
| char buffer[PATBUFSIZE]; |
| const char *error; |
| int errptr; |
| |
| if (pattern_count >= MAX_PATTERN_COUNT) |
| { |
| fprintf(stderr, "pcregrep: Too many %spatterns (max %d)\n", |
| (filename == NULL)? "command-line " : "", MAX_PATTERN_COUNT); |
| return FALSE; |
| } |
| |
| sprintf(buffer, "%s%.*s%s", prefix[process_options], bufthird, pattern, |
| suffix[process_options]); |
| pattern_list[pattern_count] = |
| pcre_compile(buffer, options, &error, &errptr, pcretables); |
| if (pattern_list[pattern_count] != NULL) |
| { |
| pattern_count++; |
| return TRUE; |
| } |
| |
| /* Handle compile errors */ |
| |
| errptr -= (int)strlen(prefix[process_options]); |
| if (errptr > (int)strlen(pattern)) errptr = (int)strlen(pattern); |
| |
| if (filename == NULL) |
| { |
| if (count == 0) |
| fprintf(stderr, "pcregrep: Error in command-line regex " |
| "at offset %d: %s\n", errptr, error); |
| else |
| fprintf(stderr, "pcregrep: Error in %s command-line regex " |
| "at offset %d: %s\n", ordin(count), errptr, error); |
| } |
| else |
| { |
| fprintf(stderr, "pcregrep: Error in regex in line %d of %s " |
| "at offset %d: %s\n", count, filename, errptr, error); |
| } |
| |
| return FALSE; |
| } |
| |
| |
| |
| /************************************************* |
| * Compile one supplied pattern * |
| *************************************************/ |
| |
| /* When the -F option has been used, each string may be a list of strings, |
| separated by line breaks. They will be matched literally. |
| |
| Arguments: |
| pattern the pattern string |
| options the PCRE options |
| filename the file name, or NULL for a command-line pattern |
| count 0 if this is the only command line pattern, or |
| number of the command line pattern, or |
| linenumber for a pattern from a file |
| |
| Returns: TRUE on success, FALSE after an error |
| */ |
| |
| static BOOL |
| compile_pattern(char *pattern, int options, char *filename, int count) |
| { |
| if ((process_options & PO_FIXED_STRINGS) != 0) |
| { |
| char *eop = pattern + strlen(pattern); |
| char buffer[PATBUFSIZE]; |
| for(;;) |
| { |
| int ellength; |
| char *p = end_of_line(pattern, eop, &ellength); |
| if (ellength == 0) |
| return compile_single_pattern(pattern, options, filename, count); |
| sprintf(buffer, "%.*s", (int)(p - pattern - ellength), pattern); |
| pattern = p; |
| if (!compile_single_pattern(buffer, options, filename, count)) |
| return FALSE; |
| } |
| } |
| else return compile_single_pattern(pattern, options, filename, count); |
| } |
| |
| |
| |
| /************************************************* |
| * Main program * |
| *************************************************/ |
| |
| /* Returns 0 if something matched, 1 if nothing matched, 2 after an error. */ |
| |
| int |
| main(int argc, char **argv) |
| { |
| int i, j; |
| int rc = 1; |
| int pcre_options = 0; |
| int cmd_pattern_count = 0; |
| int hint_count = 0; |
| int errptr; |
| BOOL only_one_at_top; |
| char *patterns[MAX_PATTERN_COUNT]; |
| const char *locale_from = "--locale"; |
| const char *error; |
| |
| #ifdef SUPPORT_PCREGREP_JIT |
| pcre_jit_stack *jit_stack = NULL; |
| #endif |
| |
| /* Set the default line ending value from the default in the PCRE library; |
| "lf", "cr", "crlf", and "any" are supported. Anything else is treated as "lf". |
| Note that the return values from pcre_config(), though derived from the ASCII |
| codes, are the same in EBCDIC environments, so we must use the actual values |
| rather than escapes such as as '\r'. */ |
| |
| (void)pcre_config(PCRE_CONFIG_NEWLINE, &i); |
| switch(i) |
| { |
| default: newline = (char *)"lf"; break; |
| case 13: newline = (char *)"cr"; break; |
| case (13 << 8) | 10: newline = (char *)"crlf"; break; |
| case -1: newline = (char *)"any"; break; |
| case -2: newline = (char *)"anycrlf"; break; |
| } |
| |
| /* Process the options */ |
| |
| for (i = 1; i < argc; i++) |
| { |
| option_item *op = NULL; |
| char *option_data = (char *)""; /* default to keep compiler happy */ |
| BOOL longop; |
| BOOL longopwasequals = FALSE; |
| |
| if (argv[i][0] != '-') break; |
| |
| /* If we hit an argument that is just "-", it may be a reference to STDIN, |
| but only if we have previously had -e or -f to define the patterns. */ |
| |
| if (argv[i][1] == 0) |
| { |
| if (pattern_filename != NULL || pattern_count > 0) break; |
| else pcregrep_exit(usage(2)); |
| } |
| |
| /* Handle a long name option, or -- to terminate the options */ |
| |
| if (argv[i][1] == '-') |
| { |
| char *arg = argv[i] + 2; |
| char *argequals = strchr(arg, '='); |
| |
| if (*arg == 0) /* -- terminates options */ |
| { |
| i++; |
| break; /* out of the options-handling loop */ |
| } |
| |
| longop = TRUE; |
| |
| /* Some long options have data that follows after =, for example file=name. |
| Some options have variations in the long name spelling: specifically, we |
| allow "regexp" because GNU grep allows it, though I personally go along |
| with Jeffrey Friedl and Larry Wall in preferring "regex" without the "p". |
| These options are entered in the table as "regex(p)". Options can be in |
| both these categories. */ |
| |
| for (op = optionlist; op->one_char != 0; op++) |
| { |
| char *opbra = strchr(op->long_name, '('); |
| char *equals = strchr(op->long_name, '='); |
| |
| /* Handle options with only one spelling of the name */ |
| |
| if (opbra == NULL) /* Does not contain '(' */ |
| { |
| if (equals == NULL) /* Not thing=data case */ |
| { |
| if (strcmp(arg, op->long_name) == 0) break; |
| } |
| else /* Special case xxx=data */ |
| { |
| int oplen = (int)(equals - op->long_name); |
| int arglen = (argequals == NULL)? |
| (int)strlen(arg) : (int)(argequals - arg); |
| if (oplen == arglen && strncmp(arg, op->long_name, oplen) == 0) |
| { |
| option_data = arg + arglen; |
| if (*option_data == '=') |
| { |
| option_data++; |
| longopwasequals = TRUE; |
| } |
| break; |
| } |
| } |
| } |
| |
| /* Handle options with an alternate spelling of the name */ |
| |
| else |
| { |
| char buff1[24]; |
| char buff2[24]; |
| |
| int baselen = (int)(opbra - op->long_name); |
| int fulllen = (int)(strchr(op->long_name, ')') - op->long_name + 1); |
| int arglen = (argequals == NULL || equals == NULL)? |
| (int)strlen(arg) : (int)(argequals - arg); |
| |
| sprintf(buff1, "%.*s", baselen, op->long_name); |
| sprintf(buff2, "%s%.*s", buff1, fulllen - baselen - 2, opbra + 1); |
| |
| if (strncmp(arg, buff1, arglen) == 0 || |
| strncmp(arg, buff2, arglen) == 0) |
| { |
| if (equals != NULL && argequals != NULL) |
| { |
| option_data = argequals; |
| if (*option_data == '=') |
| { |
| option_data++; |
| longopwasequals = TRUE; |
| } |
| } |
| break; |
| } |
| } |
| } |
| |
| if (op->one_char == 0) |
| { |
| fprintf(stderr, "pcregrep: Unknown option %s\n", argv[i]); |
| pcregrep_exit(usage(2)); |
| } |
| } |
| |
| /* Jeffrey Friedl's debugging harness uses these additional options which |
| are not in the right form for putting in the option table because they use |
| only one hyphen, yet are more than one character long. By putting them |
| separately here, they will not get displayed as part of the help() output, |
| but I don't think Jeffrey will care about that. */ |
| |
| #ifdef JFRIEDL_DEBUG |
| else if (strcmp(argv[i], "-pre") == 0) { |
| jfriedl_prefix = argv[++i]; |
| continue; |
| } else if (strcmp(argv[i], "-post") == 0) { |
| jfriedl_postfix = argv[++i]; |
| continue; |
| } else if (strcmp(argv[i], "-XT") == 0) { |
| sscanf(argv[++i], "%d", &jfriedl_XT); |
| continue; |
| } else if (strcmp(argv[i], "-XR") == 0) { |
| sscanf(argv[++i], "%d", &jfriedl_XR); |
| continue; |
| } |
| #endif |
| |
| |
| /* One-char options; many that have no data may be in a single argument; we |
| continue till we hit the last one or one that needs data. */ |
| |
| else |
| { |
| char *s = argv[i] + 1; |
| longop = FALSE; |
| while (*s != 0) |
| { |
| for (op = optionlist; op->one_char != 0; op++) |
| { |
| if (*s == op->one_char) break; |
| } |
| if (op->one_char == 0) |
| { |
| fprintf(stderr, "pcregrep: Unknown option letter '%c' in \"%s\"\n", |
| *s, argv[i]); |
| pcregrep_exit(usage(2)); |
| } |
| |
| /* Check for a single-character option that has data: OP_OP_NUMBER |
| is used for one that either has a numerical number or defaults, i.e. the |
| data is optional. If a digit follows, there is data; if not, carry on |
| with other single-character options in the same string. */ |
| |
| option_data = s+1; |
| if (op->type == OP_OP_NUMBER) |
| { |
| if (isdigit((unsigned char)s[1])) break; |
| } |
| else /* Check for end or a dataless option */ |
| { |
| if (op->type != OP_NODATA || s[1] == 0) break; |
| } |
| |
| /* Handle a single-character option with no data, then loop for the |
| next character in the string. */ |
| |
| pcre_options = handle_option(*s++, pcre_options); |
| } |
| } |
| |
| /* At this point we should have op pointing to a matched option. If the type |
| is NO_DATA, it means that there is no data, and the option might set |
| something in the PCRE options. */ |
| |
| if (op->type == OP_NODATA) |
| { |
| pcre_options = handle_option(op->one_char, pcre_options); |
| continue; |
| } |
| |
| /* If the option type is OP_OP_STRING or OP_OP_NUMBER, it's an option that |
| either has a value or defaults to something. It cannot have data in a |
| separate item. At the moment, the only such options are "colo(u)r", |
| "only-matching", and Jeffrey Friedl's special -S debugging option. */ |
| |
| if (*option_data == 0 && |
| (op->type == OP_OP_STRING || op->type == OP_OP_NUMBER)) |
| { |
| switch (op->one_char) |
| { |
| case N_COLOUR: |
| colour_option = (char *)"auto"; |
| break; |
| |
| case 'o': |
| only_matching = 0; |
| break; |
| |
| #ifdef JFRIEDL_DEBUG |
| case 'S': |
| S_arg = 0; |
| break; |
| #endif |
| } |
| continue; |
| } |
| |
| /* Otherwise, find the data string for the option. */ |
| |
| if (*option_data == 0) |
| { |
| if (i >= argc - 1 || longopwasequals) |
| { |
| fprintf(stderr, "pcregrep: Data missing after %s\n", argv[i]); |
| pcregrep_exit(usage(2)); |
| } |
| option_data = argv[++i]; |
| } |
| |
| /* If the option type is OP_PATLIST, it's the -e option, which can be called |
| multiple times to create a list of patterns. */ |
| |
| if (op->type == OP_PATLIST) |
| { |
| if (cmd_pattern_count >= MAX_PATTERN_COUNT) |
| { |
| fprintf(stderr, "pcregrep: Too many command-line patterns (max %d)\n", |
| MAX_PATTERN_COUNT); |
| return 2; |
| } |
| patterns[cmd_pattern_count++] = option_data; |
| } |
| |
| /* Otherwise, deal with single string or numeric data values. */ |
| |
| else if (op->type != OP_NUMBER && op->type != OP_LONGNUMBER && |
| op->type != OP_OP_NUMBER) |
| { |
| *((char **)op->dataptr) = option_data; |
| } |
| |
| /* Avoid the use of strtoul() because SunOS4 doesn't have it. This is used |
| only for unpicking arguments, so just keep it simple. */ |
| |
| else |
| { |
| unsigned long int n = 0; |
| char *endptr = option_data; |
| while (*endptr != 0 && isspace((unsigned char)(*endptr))) endptr++; |
| while (isdigit((unsigned char)(*endptr))) |
| n = n * 10 + (int)(*endptr++ - '0'); |
| if (toupper(*endptr) == 'K') |
| { |
| n *= 1024; |
| endptr++; |
| } |
| else if (toupper(*endptr) == 'M') |
| { |
| n *= 1024*1024; |
| endptr++; |
| } |
| if (*endptr != 0) |
| { |
| if (longop) |
| { |
| char *equals = strchr(op->long_name, '='); |
| int nlen = (equals == NULL)? (int)strlen(op->long_name) : |
| (int)(equals - op->long_name); |
| fprintf(stderr, "pcregrep: Malformed number \"%s\" after --%.*s\n", |
| option_data, nlen, op->long_name); |
| } |
| else |
| fprintf(stderr, "pcregrep: Malformed number \"%s\" after -%c\n", |
| option_data, op->one_char); |
| pcregrep_exit(usage(2)); |
| } |
| if (op->type == OP_LONGNUMBER) |
| *((unsigned long int *)op->dataptr) = n; |
| else |
| *((int *)op->dataptr) = n; |
| } |
| } |
| |
| /* Options have been decoded. If -C was used, its value is used as a default |
| for -A and -B. */ |
| |
| if (both_context > 0) |
| { |
| if (after_context == 0) after_context = both_context; |
| if (before_context == 0) before_context = both_context; |
| } |
| |
| /* Only one of --only-matching, --file-offsets, or --line-offsets is permitted. |
| However, the latter two set only_matching. */ |
| |
| if ((only_matching >= 0 && (file_offsets || line_offsets)) || |
| (file_offsets && line_offsets)) |
| { |
| fprintf(stderr, "pcregrep: Cannot mix --only-matching, --file-offsets " |
| "and/or --line-offsets\n"); |
| pcregrep_exit(usage(2)); |
| } |
| |
| if (file_offsets || line_offsets) only_matching = 0; |
| |
| /* If a locale has not been provided as an option, see if the LC_CTYPE or |
| LC_ALL environment variable is set, and if so, use it. */ |
| |
| if (locale == NULL) |
| { |
| locale = getenv("LC_ALL"); |
| locale_from = "LCC_ALL"; |
| } |
| |
| if (locale == NULL) |
| { |
| locale = getenv("LC_CTYPE"); |
| locale_from = "LC_CTYPE"; |
| } |
| |
| /* If a locale has been provided, set it, and generate the tables the PCRE |
| needs. Otherwise, pcretables==NULL, which causes the use of default tables. */ |
| |
| if (locale != NULL) |
| { |
| if (setlocale(LC_CTYPE, locale) == NULL) |
| { |
| fprintf(stderr, "pcregrep: Failed to set locale %s (obtained from %s)\n", |
| locale, locale_from); |
| return 2; |
| } |
| pcretables = pcre_maketables(); |
| } |
| |
| /* Sort out colouring */ |
| |
| if (colour_option != NULL && strcmp(colour_option, "never") != 0) |
| { |
| if (strcmp(colour_option, "always") == 0) do_colour = TRUE; |
| else if (strcmp(colour_option, "auto") == 0) do_colour = is_stdout_tty(); |
| else |
| { |
| fprintf(stderr, "pcregrep: Unknown colour setting \"%s\"\n", |
| colour_option); |
| return 2; |
| } |
| if (do_colour) |
| { |
| char *cs = getenv("PCREGREP_COLOUR"); |
| if (cs == NULL) cs = getenv("PCREGREP_COLOR"); |
| if (cs != NULL) colour_string = cs; |
| } |
| } |
| |
| /* Interpret the newline type; the default settings are Unix-like. */ |
| |
| if (strcmp(newline, "cr") == 0 || strcmp(newline, "CR") == 0) |
| { |
| pcre_options |= PCRE_NEWLINE_CR; |
| endlinetype = EL_CR; |
| } |
| else if (strcmp(newline, "lf") == 0 || strcmp(newline, "LF") == 0) |
| { |
| pcre_options |= PCRE_NEWLINE_LF; |
| endlinetype = EL_LF; |
| } |
| else if (strcmp(newline, "crlf") == 0 || strcmp(newline, "CRLF") == 0) |
| { |
| pcre_options |= PCRE_NEWLINE_CRLF; |
| endlinetype = EL_CRLF; |
| } |
| else if (strcmp(newline, "any") == 0 || strcmp(newline, "ANY") == 0) |
| { |
| pcre_options |= PCRE_NEWLINE_ANY; |
| endlinetype = EL_ANY; |
| } |
| else if (strcmp(newline, "anycrlf") == 0 || strcmp(newline, "ANYCRLF") == 0) |
| { |
| pcre_options |= PCRE_NEWLINE_ANYCRLF; |
| endlinetype = EL_ANYCRLF; |
| } |
| else |
| { |
| fprintf(stderr, "pcregrep: Invalid newline specifier \"%s\"\n", newline); |
| return 2; |
| } |
| |
| /* Interpret the text values for -d and -D */ |
| |
| if (dee_option != NULL) |
| { |
| if (strcmp(dee_option, "read") == 0) dee_action = dee_READ; |
| else if (strcmp(dee_option, "recurse") == 0) dee_action = dee_RECURSE; |
| else if (strcmp(dee_option, "skip") == 0) dee_action = dee_SKIP; |
| else |
| { |
| fprintf(stderr, "pcregrep: Invalid value \"%s\" for -d\n", dee_option); |
| return 2; |
| } |
| } |
| |
| if (DEE_option != NULL) |
| { |
| if (strcmp(DEE_option, "read") == 0) DEE_action = DEE_READ; |
| else if (strcmp(DEE_option, "skip") == 0) DEE_action = DEE_SKIP; |
| else |
| { |
| fprintf(stderr, "pcregrep: Invalid value \"%s\" for -D\n", DEE_option); |
| return 2; |
| } |
| } |
| |
| /* Check the values for Jeffrey Friedl's debugging options. */ |
| |
| #ifdef JFRIEDL_DEBUG |
| if (S_arg > 9) |
| { |
| fprintf(stderr, "pcregrep: bad value for -S option\n"); |
| return 2; |
| } |
| if (jfriedl_XT != 0 || jfriedl_XR != 0) |
| { |
| if (jfriedl_XT == 0) jfriedl_XT = 1; |
| if (jfriedl_XR == 0) jfriedl_XR = 1; |
| } |
| #endif |
| |
| /* Get memory for the main buffer, and to store the pattern and hints lists. */ |
| |
| bufsize = 3*bufthird; |
| main_buffer = (char *)malloc(bufsize); |
| pattern_list = (pcre **)malloc(MAX_PATTERN_COUNT * sizeof(pcre *)); |
| hints_list = (pcre_extra **)malloc(MAX_PATTERN_COUNT * sizeof(pcre_extra *)); |
| |
| if (main_buffer == NULL || pattern_list == NULL || hints_list == NULL) |
| { |
| fprintf(stderr, "pcregrep: malloc failed\n"); |
| goto EXIT2; |
| } |
| |
| /* If no patterns were provided by -e, and there is no file provided by -f, |
| the first argument is the one and only pattern, and it must exist. */ |
| |
| if (cmd_pattern_count == 0 && pattern_filename == NULL) |
| { |
| if (i >= argc) return usage(2); |
| patterns[cmd_pattern_count++] = argv[i++]; |
| } |
| |
| /* Compile the patterns that were provided on the command line, either by |
| multiple uses of -e or as a single unkeyed pattern. */ |
| |
| for (j = 0; j < cmd_pattern_count; j++) |
| { |
| if (!compile_pattern(patterns[j], pcre_options, NULL, |
| (j == 0 && cmd_pattern_count == 1)? 0 : j + 1)) |
| goto EXIT2; |
| } |
| |
| /* Compile the regular expressions that are provided in a file. */ |
| |
| if (pattern_filename != NULL) |
| { |
| int linenumber = 0; |
| FILE *f; |
| char *filename; |
| char buffer[PATBUFSIZE]; |
| |
| if (strcmp(pattern_filename, "-") == 0) |
| { |
| f = stdin; |
| filename = stdin_name; |
| } |
| else |
| { |
| f = fopen(pattern_filename, "r"); |
| if (f == NULL) |
| { |
| fprintf(stderr, "pcregrep: Failed to open %s: %s\n", pattern_filename, |
| strerror(errno)); |
| goto EXIT2; |
| } |
| filename = pattern_filename; |
| } |
| |
| while (fgets(buffer, PATBUFSIZE, f) != NULL) |
| { |
| char *s = buffer + (int)strlen(buffer); |
| while (s > buffer && isspace((unsigned char)(s[-1]))) s--; |
| *s = 0; |
| linenumber++; |
| if (buffer[0] == 0) continue; /* Skip blank lines */ |
| if (!compile_pattern(buffer, pcre_options, filename, linenumber)) |
| goto EXIT2; |
| } |
| |
| if (f != stdin) fclose(f); |
| } |
| |
| /* Study the regular expressions, as we will be running them many times. Unless |
| JIT has been explicitly disabled, arrange a stack for it to use. */ |
| |
| #ifdef SUPPORT_PCREGREP_JIT |
| if ((study_options & PCRE_STUDY_JIT_COMPILE) != 0) |
| jit_stack = pcre_jit_stack_alloc(32*1024, 1024*1024); |
| #endif |
| |
| for (j = 0; j < pattern_count; j++) |
| { |
| hints_list[j] = pcre_study(pattern_list[j], study_options, &error); |
| if (error != NULL) |
| { |
| char s[16]; |
| if (pattern_count == 1) s[0] = 0; else sprintf(s, " number %d", j); |
| fprintf(stderr, "pcregrep: Error while studying regex%s: %s\n", s, error); |
| goto EXIT2; |
| } |
| hint_count++; |
| #ifdef SUPPORT_PCREGREP_JIT |
| if (jit_stack != NULL && hints_list[j] != NULL) |
| pcre_assign_jit_stack(hints_list[j], NULL, jit_stack); |
| #endif |
| } |
| |
| /* If --match-limit or --recursion-limit was set, put the value(s) into the |
| pcre_extra block for each pattern. */ |
| |
| if (match_limit > 0 || match_limit_recursion > 0) |
| { |
| for (j = 0; j < pattern_count; j++) |
| { |
| if (hints_list[j] == NULL) |
| { |
| hints_list[j] = malloc(sizeof(pcre_extra)); |
| if (hints_list[j] == NULL) |
| { |
| fprintf(stderr, "pcregrep: malloc failed\n"); |
| pcregrep_exit(2); |
| } |
| } |
| if (match_limit > 0) |
| { |
| hints_list[j]->flags |= PCRE_EXTRA_MATCH_LIMIT; |
| hints_list[j]->match_limit = match_limit; |
| } |
| if (match_limit_recursion > 0) |
| { |
| hints_list[j]->flags |= PCRE_EXTRA_MATCH_LIMIT_RECURSION; |
| hints_list[j]->match_limit_recursion = match_limit_recursion; |
| } |
| } |
| } |
| |
| /* If there are include or exclude patterns, compile them. */ |
| |
| if (exclude_pattern != NULL) |
| { |
| exclude_compiled = pcre_compile(exclude_pattern, 0, &error, &errptr, |
| pcretables); |
| if (exclude_compiled == NULL) |
| { |
| fprintf(stderr, "pcregrep: Error in 'exclude' regex at offset %d: %s\n", |
| errptr, error); |
| goto EXIT2; |
| } |
| } |
| |
| if (include_pattern != NULL) |
| { |
| include_compiled = pcre_compile(include_pattern, 0, &error, &errptr, |
| pcretables); |
| if (include_compiled == NULL) |
| { |
| fprintf(stderr, "pcregrep: Error in 'include' regex at offset %d: %s\n", |
| errptr, error); |
| goto EXIT2; |
| } |
| } |
| |
| if (exclude_dir_pattern != NULL) |
| { |
| exclude_dir_compiled = pcre_compile(exclude_dir_pattern, 0, &error, &errptr, |
| pcretables); |
| if (exclude_dir_compiled == NULL) |
| { |
| fprintf(stderr, "pcregrep: Error in 'exclude_dir' regex at offset %d: %s\n", |
| errptr, error); |
| goto EXIT2; |
| } |
| } |
| |
| if (include_dir_pattern != NULL) |
| { |
| include_dir_compiled = pcre_compile(include_dir_pattern, 0, &error, &errptr, |
| pcretables); |
| if (include_dir_compiled == NULL) |
| { |
| fprintf(stderr, "pcregrep: Error in 'include_dir' regex at offset %d: %s\n", |
| errptr, error); |
| goto EXIT2; |
| } |
| } |
| |
| /* If there are no further arguments, do the business on stdin and exit. */ |
| |
| if (i >= argc) |
| { |
| rc = pcregrep(stdin, FR_PLAIN, stdin_name, |
| (filenames > FN_DEFAULT)? stdin_name : NULL); |
| goto EXIT; |
| } |
| |
| /* Otherwise, work through the remaining arguments as files or directories. |
| Pass in the fact that there is only one argument at top level - this suppresses |
| the file name if the argument is not a directory and filenames are not |
| otherwise forced. */ |
| |
| only_one_at_top = i == argc - 1; /* Catch initial value of i */ |
| |
| for (; i < argc; i++) |
| { |
| int frc = grep_or_recurse(argv[i], dee_action == dee_RECURSE, |
| only_one_at_top); |
| if (frc > 1) rc = frc; |
| else if (frc == 0 && rc == 1) rc = 0; |
| } |
| |
| EXIT: |
| #ifdef SUPPORT_PCREGREP_JIT |
| if (jit_stack != NULL) pcre_jit_stack_free(jit_stack); |
| #endif |
| if (main_buffer != NULL) free(main_buffer); |
| if (pattern_list != NULL) |
| { |
| for (i = 0; i < pattern_count; i++) free(pattern_list[i]); |
| free(pattern_list); |
| } |
| if (hints_list != NULL) |
| { |
| for (i = 0; i < hint_count; i++) |
| { |
| if (hints_list[i] != NULL) pcre_free_study(hints_list[i]); |
| } |
| free(hints_list); |
| } |
| pcregrep_exit(rc); |
| |
| EXIT2: |
| rc = 2; |
| goto EXIT; |
| } |
| |
| /* End of pcregrep */ |