diff --git a/usr.bin/grep/grep.1 b/usr.bin/grep/grep.1 index d3b30828c821..338af7e6d454 100644 --- a/usr.bin/grep/grep.1 +++ b/usr.bin/grep/grep.1 @@ -1,579 +1,582 @@ .\" $NetBSD: grep.1,v 1.2 2011/02/16 01:31:33 joerg Exp $ .\" $FreeBSD$ .\" $OpenBSD: grep.1,v 1.38 2010/04/05 06:30:59 jmc Exp $ .\" Copyright (c) 1980, 1990, 1993 .\" The Regents of the University of California. All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. 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. .\" 3. Neither the name of the University 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 REGENTS 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 REGENTS 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. .\" .\" @(#)grep.1 8.3 (Berkeley) 4/18/94 .\" -.Dd November 19, 2020 +.Dd February 4, 2021 .Dt GREP 1 .Os .Sh NAME .Nm grep , .Nm egrep , .Nm fgrep , .Nm rgrep .Nd file pattern searcher .Sh SYNOPSIS .Nm grep .Bk -words .Op Fl abcdDEFGHhIiLlmnOopqRSsUVvwxz .Op Fl A Ar num .Op Fl B Ar num .Op Fl C Ns Op Ar num .Op Fl e Ar pattern .Op Fl f Ar file .Op Fl Fl binary-files= Ns Ar value .Op Fl Fl color Ns Op Cm = Ns Ar when .Op Fl Fl colour Ns Op Cm = Ns Ar when .Op Fl Fl context Ns Op Cm = Ns Ar num .Op Fl Fl label .Op Fl Fl line-buffered .Op Fl Fl null .Op Ar pattern .Op Ar .Ek .Sh DESCRIPTION The .Nm grep utility searches any given input files, selecting lines that match one or more patterns. By default, a pattern matches an input line if the regular expression (RE) in the pattern matches the input line without its trailing newline. An empty expression matches every line. Each input line that matches at least one of the patterns is written to the standard output. .Pp .Nm grep is used for simple patterns and basic regular expressions .Pq BREs ; .Nm egrep can handle extended regular expressions .Pq EREs . See .Xr re_format 7 for more information on regular expressions. .Nm fgrep is quicker than both .Nm grep and .Nm egrep , but can only handle fixed patterns (i.e., it does not interpret regular expressions). Patterns may consist of one or more lines, allowing any of the pattern lines to match a portion of the input. .Pp The following options are available: .Bl -tag -width indent .It Fl A Ar num , Fl Fl after-context= Ns Ar num Print .Ar num lines of trailing context after each match. See also the .Fl B and .Fl C options. .It Fl a , Fl Fl text Treat all files as ASCII text. Normally .Nm will simply print .Dq Binary file ... matches if files contain binary characters. Use of this option forces .Nm to output lines matching the specified pattern. .It Fl B Ar num , Fl Fl before-context= Ns Ar num Print .Ar num lines of leading context before each match. See also the .Fl A and .Fl C options. .It Fl b , Fl Fl byte-offset The offset in bytes of a matched pattern is displayed in front of the respective matched line. .It Fl C Ns Oo Ar num Oc , Fl Fl context Ns Oo = Ns Ar num Oc Print .Ar num lines of leading and trailing context surrounding each match. The default value of .Ar num is .Dq 2 and is equivalent to .Dq Fl A Ar 2 Fl B Ar 2 . Note: no whitespace may be given between the option and its argument. .It Fl c , Fl Fl count Only a count of selected lines is written to standard output. .It Fl Fl colour= Ns Oo Ar when Oc , Fl Fl color= Ns Oo Ar when Oc Mark up the matching text with the expression stored in the .Ev GREP_COLOR environment variable. The possible values of .Ar when are .Dq Cm never , .Dq Cm always and .Dq Cm auto . .It Fl D Ar action , Fl Fl devices= Ns Ar action Specify the demanded .Ar action for devices, FIFOs and sockets. The default .Ar action is .Dq Cm read , which means, that they are read as if they were normal files. If the .Ar action is set to .Dq Cm skip , devices are silently skipped. .It Fl d Ar action , Fl Fl directories= Ns Ar action Specify the demanded .Ar action for directories. It is .Dq Cm read by default, which means that the directories are read in the same manner as normal files. Other possible values are .Dq Cm skip to silently ignore the directories, and .Dq Cm recurse to read them recursively, which has the same effect as the .Fl R and .Fl r option. .It Fl E , Fl Fl extended-regexp Interpret .Ar pattern as an extended regular expression (i.e., force .Nm grep to behave as .Nm egrep ) . .It Fl e Ar pattern , Fl Fl regexp= Ns Ar pattern Specify a .Ar pattern used during the search of the input: an input line is selected if it matches any of the specified patterns. This option is most useful when multiple .Fl e options are used to specify multiple patterns, or when a .Ar pattern begins with a dash .Pq Sq - . .It Fl Fl exclude Ar pattern If specified, it excludes files matching the given filename .Ar pattern from the search. Note that .Fl Fl exclude and .Fl Fl include patterns are processed in the order given. If a name matches multiple patterns, the latest matching rule wins. If no .Fl Fl include pattern is specified, all files are searched that are not excluded. Patterns are matched to the full path specified, not only to the filename component. .It Fl Fl exclude-dir Ar pattern If .Fl R is specified, it excludes directories matching the given filename .Ar pattern from the search. Note that .Fl Fl exclude-dir and .Fl Fl include-dir patterns are processed in the order given. If a name matches multiple patterns, the latest matching rule wins. If no .Fl Fl include-dir pattern is specified, all directories are searched that are not excluded. .It Fl F , Fl Fl fixed-strings Interpret .Ar pattern as a set of fixed strings (i.e., force .Nm grep to behave as .Nm fgrep ) . .It Fl f Ar file , Fl Fl file= Ns Ar file Read one or more newline separated patterns from .Ar file . Empty pattern lines match every input line. Newlines are not considered part of a pattern. If .Ar file is empty, nothing is matched. .It Fl G , Fl Fl basic-regexp Interpret .Ar pattern as a basic regular expression (i.e., force .Nm grep to behave as traditional .Nm grep ) . .It Fl H Always print filename headers with output lines. .It Fl h , Fl Fl no-filename Never print filename headers .Pq i.e., filenames with output lines. .It Fl Fl help Print a brief help message. .It Fl I Ignore binary files. This option is equivalent to the .Dq Fl Fl binary-file= Ns Cm without-match option. .It Fl i , Fl Fl ignore-case Perform case insensitive matching. By default, .Nm grep is case sensitive. .It Fl Fl include Ar pattern If specified, only files matching the given filename .Ar pattern are searched. Note that .Fl Fl include and .Fl Fl exclude patterns are processed in the order given. If a name matches multiple patterns, the latest matching rule wins. Patterns are matched to the full path specified, not only to the filename component. .It Fl Fl include-dir Ar pattern If .Fl R is specified, only directories matching the given filename .Ar pattern are searched. Note that .Fl Fl include-dir and .Fl Fl exclude-dir patterns are processed in the order given. If a name matches multiple patterns, the latest matching rule wins. .It Fl L , Fl Fl files-without-match Only the names of files not containing selected lines are written to standard output. Pathnames are listed once per file searched. If the standard input is searched, the string .Dq (standard input) is written unless a .Fl Fl label is specified. .It Fl l , Fl Fl files-with-matches Only the names of files containing selected lines are written to standard output. .Nm grep will only search a file until a match has been found, making searches potentially less expensive. Pathnames are listed once per file searched. If the standard input is searched, the string .Dq (standard input) is written unless a .Fl Fl label is specified. .It Fl Fl label Label to use in place of .Dq (standard input) for a file name where a file name would normally be printed. This option applies to .Fl H , .Fl L , and .Fl l . .It Fl Fl mmap Use .Xr mmap 2 instead of .Xr read 2 to read input, which can result in better performance under some circumstances but can cause undefined behaviour. .It Fl m Ar num , Fl Fl max-count= Ns Ar num Stop reading the file after .Ar num matches. .It Fl n , Fl Fl line-number Each output line is preceded by its relative line number in the file, starting at line 1. The line number counter is reset for each file processed. This option is ignored if .Fl c , .Fl L , .Fl l , or .Fl q is specified. .It Fl Fl null Prints a zero-byte after the file name. .It Fl O If .Fl R is specified, follow symbolic links only if they were explicitly listed on the command line. The default is not to follow symbolic links. .It Fl o , Fl Fl only-matching Prints only the matching part of the lines. .It Fl p If .Fl R is specified, no symbolic links are followed. This is the default. .It Fl q , Fl Fl quiet , Fl Fl silent Quiet mode: suppress normal output. .Nm grep will only search a file until a match has been found, making searches potentially less expensive. .It Fl R , Fl r , Fl Fl recursive Recursively search subdirectories listed. (i.e., force .Nm grep to behave as .Nm rgrep ) . .It Fl S If .Fl R is specified, all symbolic links are followed. The default is not to follow symbolic links. .It Fl s , Fl Fl no-messages Silent mode. Nonexistent and unreadable files are ignored (i.e., their error messages are suppressed). .It Fl U , Fl Fl binary Search binary files, but do not attempt to print them. .It Fl u This option has no effect and is provided only for compatibility with GNU grep. .It Fl V , Fl Fl version Display version information and exit. .It Fl v , Fl Fl invert-match Selected lines are those .Em not matching any of the specified patterns. .It Fl w , Fl Fl word-regexp The expression is searched for as a word (as if surrounded by .Sq [[:<:]] and .Sq [[:>:]] ; see .Xr re_format 7 ) . +This option has no effect if +.Fl x +is also specified. .It Fl x , Fl Fl line-regexp Only input lines selected against an entire fixed string or regular expression are considered to be matching lines. .It Fl y Equivalent to .Fl i . Obsoleted. .It Fl z , Fl Fl null-data Treat input and output data as sequences of lines terminated by a zero-byte instead of a newline. .It Fl Fl binary-files= Ns Ar value Controls searching and printing of binary files. Options are: .Bl -tag -compact -width "binary (default)" .It Cm binary No (default) Search binary files but do not print them. .It Cm without-match Do not search binary files. .It Cm text Treat all files as text. .El .It Fl Fl line-buffered Force output to be line buffered. By default, output is line buffered when standard output is a terminal and block buffered otherwise. .El .Pp If no file arguments are specified, the standard input is used. Additionally, .Dq Cm - may be used in place of a file name, anywhere that a file name is accepted, to read from standard input. This includes both .Fl f and file arguments. .Sh EXIT STATUS The .Nm grep utility exits with one of the following values: .Pp .Bl -tag -width flag -compact .It Li 0 One or more lines were selected. .It Li 1 No lines were selected. .It Li \*(Gt1 An error occurred. .El .Sh EXAMPLES .Bl -dash .It Find all occurrences of the pattern .Sq patricia in a file: .Pp .Dl $ grep 'patricia' myfile .It Same as above but looking only for complete words: .Pp .Dl $ grep -w 'patricia' myfile .It Count occurrences of the exact pattern .Sq FOO : .Pp .Dl $ grep -c FOO myfile .It Same as above but ignoring case: .Pp .Dl $ grep -c -i FOO myfile .It Find all occurrences of the pattern .Ql .Pp at the beginning of a line: .Pp .Dl $ grep '^\e.Pp' myfile .Pp The apostrophes ensure the entire expression is evaluated by .Nm grep instead of by the user's shell. The caret .Ql ^ matches the null string at the beginning of a line, and the .Ql \e escapes the .Ql \&. , which would otherwise match any character. .It Find all lines in a file which do not contain the words .Sq foo or .Sq bar : .Pp .Dl $ grep -v -e 'foo' -e 'bar' myfile .It Peruse the file .Sq calendar looking for either 19, 20, or 25 using extended regular expressions: .Pp .Dl $ egrep '19|20|25' calendar .It Show matching lines and the name of the .Sq *.h files which contain the pattern .Sq FIXME . Do the search recursively from the .Pa /usr/src/sys/arm directory .Pp .Dl $ grep -H -R FIXME --include=*.h /usr/src/sys/arm/ .It Same as above but show only the name of the matching file: .Pp .Dl $ grep -l -R FIXME --include=*.h /usr/src/sys/arm/ .It Show lines containing the text .Sq foo . The matching part of the output is colored and every line is prefixed with the line number and the offset in the file for those lines that matched. .Pp .Dl $ grep -b --colour -n foo myfile .It Show lines that match the extended regular expression patterns read from the standard input: .Pp .Dl $ echo -e 'Free\enBSD\enAll.*reserved' | grep -E -f - myfile .It Show lines from the output of the .Xr pciconf 8 command matching the specified extended regular expression along with three lines of leading context and one line of trailing context: .Pp .Dl $ pciconf -lv | grep -B3 -A1 -E 'class.*=.*storage' .It Suppress any output and use the exit status to show an appropriate message: .Pp .Dl $ grep -q foo myfile && echo File matches .El .Sh SEE ALSO .Xr ed 1 , .Xr ex 1 , .Xr sed 1 , .Xr zgrep 1 , .Xr re_format 7 .Sh STANDARDS The .Nm utility is compliant with the .St -p1003.1-2008 specification. .Pp The flags .Op Fl AaBbCDdGHhILmoPRSUVw are extensions to that specification, and the behaviour of the .Fl f flag when used with an empty pattern file is left undefined. .Pp All long options are provided for compatibility with GNU versions of this utility. .Pp Historic versions of the .Nm grep utility also supported the flags .Op Fl ruy . This implementation supports those options; however, their use is strongly discouraged. .Sh HISTORY The .Nm grep command first appeared in .At v6 . diff --git a/usr.bin/grep/grep.c b/usr.bin/grep/grep.c index 33541e4fe734..166d3451774a 100644 --- a/usr.bin/grep/grep.c +++ b/usr.bin/grep/grep.c @@ -1,722 +1,726 @@ /* $NetBSD: grep.c,v 1.6 2011/04/18 03:48:23 joerg Exp $ */ /* $FreeBSD$ */ /* $OpenBSD: grep.c,v 1.42 2010/07/02 22:18:03 tedu Exp $ */ /*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 1999 James Howard and Dag-Erling Coïdan Smørgrav * Copyright (C) 2008-2009 Gabor Kovesdan * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. */ #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "grep.h" const char *errstr[] = { "", /* 1*/ "(standard input)", /* 2*/ "unknown %s option", /* 3*/ "usage: %s [-abcDEFGHhIiLlmnOoPqRSsUVvwxz] [-A num] [-B num] [-C[num]]\n", /* 4*/ "\t[-e pattern] [-f file] [--binary-files=value] [--color=when]\n", /* 5*/ "\t[--context[=num]] [--directories=action] [--label] [--line-buffered]\n", /* 6*/ "\t[--null] [pattern] [file ...]\n", /* 7*/ "Binary file %s matches\n", /* 8*/ "%s (BSD grep, GNU compatible) %s\n", }; /* Flags passed to regcomp() and regexec() */ int cflags = REG_NOSUB | REG_NEWLINE; int eflags = REG_STARTEND; bool matchall; /* Searching patterns */ unsigned int patterns; static unsigned int pattern_sz; struct pat *pattern; regex_t *r_pattern; /* Filename exclusion/inclusion patterns */ unsigned int fpatterns, dpatterns; static unsigned int fpattern_sz, dpattern_sz; struct epat *dpattern, *fpattern; /* For regex errors */ char re_error[RE_ERROR_BUF + 1]; /* Command-line flags */ long long Aflag; /* -A x: print x lines trailing each match */ long long Bflag; /* -B x: print x lines leading each match */ bool Hflag; /* -H: always print file name */ bool Lflag; /* -L: only show names of files with no matches */ bool bflag; /* -b: show block numbers for each match */ bool cflag; /* -c: only show a count of matching lines */ bool hflag; /* -h: don't print filename headers */ bool iflag; /* -i: ignore case */ bool lflag; /* -l: only show names of files with matches */ bool mflag; /* -m x: stop reading the files after x matches */ long long mcount; /* count for -m */ long long mlimit; /* requested value for -m */ char fileeol; /* indicator for eol */ bool nflag; /* -n: show line numbers in front of matching lines */ bool oflag; /* -o: print only matching part */ bool qflag; /* -q: quiet mode (don't output anything) */ bool sflag; /* -s: silent mode (ignore errors) */ bool vflag; /* -v: only show non-matching lines */ bool wflag; /* -w: pattern must start and end on word boundaries */ bool xflag; /* -x: pattern must match entire line */ bool lbflag; /* --line-buffered */ bool nullflag; /* --null */ char *label; /* --label */ const char *color; /* --color */ int grepbehave = GREP_BASIC; /* -EFGP: type of the regex */ int binbehave = BINFILE_BIN; /* -aIU: handling of binary files */ int filebehave = FILE_STDIO; int devbehave = DEV_READ; /* -D: handling of devices */ int dirbehave = DIR_READ; /* -dRr: handling of directories */ int linkbehave = LINK_READ; /* -OpS: handling of symlinks */ bool dexclude, dinclude; /* --exclude-dir and --include-dir */ bool fexclude, finclude; /* --exclude and --include */ enum { BIN_OPT = CHAR_MAX + 1, COLOR_OPT, HELP_OPT, MMAP_OPT, LINEBUF_OPT, LABEL_OPT, NULL_OPT, R_EXCLUDE_OPT, R_INCLUDE_OPT, R_DEXCLUDE_OPT, R_DINCLUDE_OPT }; static inline const char *init_color(const char *); /* Housekeeping */ bool file_err; /* file reading error */ /* * Prints usage information and returns 2. */ static void usage(void) { fprintf(stderr, errstr[3], getprogname()); fprintf(stderr, "%s", errstr[4]); fprintf(stderr, "%s", errstr[5]); fprintf(stderr, "%s", errstr[6]); exit(2); } static const char *optstr = "0123456789A:B:C:D:EFGHILOPSRUVabcd:e:f:hilm:nopqrsuvwxyz"; static const struct option long_options[] = { {"binary-files", required_argument, NULL, BIN_OPT}, {"help", no_argument, NULL, HELP_OPT}, {"mmap", no_argument, NULL, MMAP_OPT}, {"line-buffered", no_argument, NULL, LINEBUF_OPT}, {"label", required_argument, NULL, LABEL_OPT}, {"null", no_argument, NULL, NULL_OPT}, {"color", optional_argument, NULL, COLOR_OPT}, {"colour", optional_argument, NULL, COLOR_OPT}, {"exclude", required_argument, NULL, R_EXCLUDE_OPT}, {"include", required_argument, NULL, R_INCLUDE_OPT}, {"exclude-dir", required_argument, NULL, R_DEXCLUDE_OPT}, {"include-dir", required_argument, NULL, R_DINCLUDE_OPT}, {"after-context", required_argument, NULL, 'A'}, {"text", no_argument, NULL, 'a'}, {"before-context", required_argument, NULL, 'B'}, {"byte-offset", no_argument, NULL, 'b'}, {"context", optional_argument, NULL, 'C'}, {"count", no_argument, NULL, 'c'}, {"devices", required_argument, NULL, 'D'}, {"directories", required_argument, NULL, 'd'}, {"extended-regexp", no_argument, NULL, 'E'}, {"regexp", required_argument, NULL, 'e'}, {"fixed-strings", no_argument, NULL, 'F'}, {"file", required_argument, NULL, 'f'}, {"basic-regexp", no_argument, NULL, 'G'}, {"no-filename", no_argument, NULL, 'h'}, {"with-filename", no_argument, NULL, 'H'}, {"ignore-case", no_argument, NULL, 'i'}, {"files-with-matches", no_argument, NULL, 'l'}, {"files-without-match", no_argument, NULL, 'L'}, {"max-count", required_argument, NULL, 'm'}, {"line-number", no_argument, NULL, 'n'}, {"only-matching", no_argument, NULL, 'o'}, {"quiet", no_argument, NULL, 'q'}, {"silent", no_argument, NULL, 'q'}, {"recursive", no_argument, NULL, 'r'}, {"no-messages", no_argument, NULL, 's'}, {"binary", no_argument, NULL, 'U'}, {"unix-byte-offsets", no_argument, NULL, 'u'}, {"invert-match", no_argument, NULL, 'v'}, {"version", no_argument, NULL, 'V'}, {"word-regexp", no_argument, NULL, 'w'}, {"line-regexp", no_argument, NULL, 'x'}, {"null-data", no_argument, NULL, 'z'}, {NULL, no_argument, NULL, 0} }; /* * Adds a searching pattern to the internal array. */ static void add_pattern(char *pat, size_t len) { /* Check if we can do a shortcut */ if (len == 0) { matchall = true; return; } /* Increase size if necessary */ if (patterns == pattern_sz) { pattern_sz *= 2; pattern = grep_realloc(pattern, ++pattern_sz * sizeof(struct pat)); } if (len > 0 && pat[len - 1] == '\n') --len; /* pat may not be NUL-terminated */ pattern[patterns].pat = grep_malloc(len + 1); memcpy(pattern[patterns].pat, pat, len); pattern[patterns].len = len; pattern[patterns].pat[len] = '\0'; ++patterns; } /* * Adds a file include/exclude pattern to the internal array. */ static void add_fpattern(const char *pat, int mode) { /* Increase size if necessary */ if (fpatterns == fpattern_sz) { fpattern_sz *= 2; fpattern = grep_realloc(fpattern, ++fpattern_sz * sizeof(struct epat)); } fpattern[fpatterns].pat = grep_strdup(pat); fpattern[fpatterns].mode = mode; ++fpatterns; } /* * Adds a directory include/exclude pattern to the internal array. */ static void add_dpattern(const char *pat, int mode) { /* Increase size if necessary */ if (dpatterns == dpattern_sz) { dpattern_sz *= 2; dpattern = grep_realloc(dpattern, ++dpattern_sz * sizeof(struct epat)); } dpattern[dpatterns].pat = grep_strdup(pat); dpattern[dpatterns].mode = mode; ++dpatterns; } /* * Reads searching patterns from a file and adds them with add_pattern(). */ static void read_patterns(const char *fn) { struct stat st; FILE *f; char *line; size_t len; ssize_t rlen; if (strcmp(fn, "-") == 0) f = stdin; else if ((f = fopen(fn, "r")) == NULL) err(2, "%s", fn); if ((fstat(fileno(f), &st) == -1) || (S_ISDIR(st.st_mode))) { fclose(f); return; } len = 0; line = NULL; while ((rlen = getline(&line, &len, f)) != -1) { if (line[0] == '\0') continue; add_pattern(line, line[0] == '\n' ? 0 : (size_t)rlen); } free(line); if (ferror(f)) err(2, "%s", fn); if (strcmp(fn, "-") != 0) fclose(f); } static inline const char * init_color(const char *d) { char *c; c = getenv("GREP_COLOR"); return (c != NULL && c[0] != '\0' ? c : d); } int main(int argc, char *argv[]) { char **aargv, **eargv, *eopts; char *ep; const char *pn; long long l; unsigned int aargc, eargc, i; int c, lastc, needpattern, newarg, prevoptind; bool matched; setlocale(LC_ALL, ""); /* * Check how we've bene invoked to determine the behavior we should * exhibit. In this way we can have all the functionalities in one * binary without the need of scripting and using ugly hacks. */ pn = getprogname(); switch (pn[0]) { case 'e': grepbehave = GREP_EXTENDED; break; case 'f': grepbehave = GREP_FIXED; break; case 'r': dirbehave = DIR_RECURSE; Hflag = true; break; } lastc = '\0'; newarg = 1; prevoptind = 1; needpattern = 1; fileeol = '\n'; eopts = getenv("GREP_OPTIONS"); /* support for extra arguments in GREP_OPTIONS */ eargc = 0; if (eopts != NULL && eopts[0] != '\0') { char *str; /* make an estimation of how many extra arguments we have */ for (unsigned int j = 0; j < strlen(eopts); j++) if (eopts[j] == ' ') eargc++; eargv = (char **)grep_malloc(sizeof(char *) * (eargc + 1)); eargc = 0; /* parse extra arguments */ while ((str = strsep(&eopts, " ")) != NULL) if (str[0] != '\0') eargv[eargc++] = grep_strdup(str); aargv = (char **)grep_calloc(eargc + argc + 1, sizeof(char *)); aargv[0] = argv[0]; for (i = 0; i < eargc; i++) aargv[i + 1] = eargv[i]; for (int j = 1; j < argc; j++, i++) aargv[i + 1] = argv[j]; aargc = eargc + argc; } else { aargv = argv; aargc = argc; } while (((c = getopt_long(aargc, aargv, optstr, long_options, NULL)) != -1)) { switch (c) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': if (newarg || !isdigit(lastc)) Aflag = 0; else if (Aflag > LLONG_MAX / 10 - 1) { errno = ERANGE; err(2, NULL); } Aflag = Bflag = (Aflag * 10) + (c - '0'); break; case 'C': if (optarg == NULL) { Aflag = Bflag = 2; break; } /* FALLTHROUGH */ case 'A': /* FALLTHROUGH */ case 'B': errno = 0; l = strtoll(optarg, &ep, 10); if (errno == ERANGE || errno == EINVAL) err(2, NULL); else if (ep[0] != '\0') { errno = EINVAL; err(2, NULL); } else if (l < 0) { errno = EINVAL; err(2, "context argument must be non-negative"); } if (c == 'A') Aflag = l; else if (c == 'B') Bflag = l; else Aflag = Bflag = l; break; case 'a': binbehave = BINFILE_TEXT; break; case 'b': bflag = true; break; case 'c': cflag = true; break; case 'D': if (strcasecmp(optarg, "skip") == 0) devbehave = DEV_SKIP; else if (strcasecmp(optarg, "read") == 0) devbehave = DEV_READ; else errx(2, errstr[2], "--devices"); break; case 'd': if (strcasecmp("recurse", optarg) == 0) { Hflag = true; dirbehave = DIR_RECURSE; } else if (strcasecmp("skip", optarg) == 0) dirbehave = DIR_SKIP; else if (strcasecmp("read", optarg) == 0) dirbehave = DIR_READ; else errx(2, errstr[2], "--directories"); break; case 'E': grepbehave = GREP_EXTENDED; break; case 'e': { char *token; char *string = optarg; while ((token = strsep(&string, "\n")) != NULL) add_pattern(token, strlen(token)); } needpattern = 0; break; case 'F': grepbehave = GREP_FIXED; break; case 'f': read_patterns(optarg); needpattern = 0; break; case 'G': grepbehave = GREP_BASIC; break; case 'H': Hflag = true; break; case 'h': Hflag = false; hflag = true; break; case 'I': binbehave = BINFILE_SKIP; break; case 'i': case 'y': iflag = true; cflags |= REG_ICASE; break; case 'L': lflag = false; Lflag = true; break; case 'l': Lflag = false; lflag = true; break; case 'm': mflag = true; errno = 0; mlimit = mcount = strtoll(optarg, &ep, 10); if (((errno == ERANGE) && (mcount == LLONG_MAX)) || ((errno == EINVAL) && (mcount == 0))) err(2, NULL); else if (ep[0] != '\0') { errno = EINVAL; err(2, NULL); } break; case 'n': nflag = true; break; case 'O': linkbehave = LINK_EXPLICIT; break; case 'o': oflag = true; cflags &= ~REG_NOSUB; break; case 'p': linkbehave = LINK_SKIP; break; case 'q': qflag = true; break; case 'S': linkbehave = LINK_READ; break; case 'R': case 'r': dirbehave = DIR_RECURSE; Hflag = true; break; case 's': sflag = true; break; case 'U': binbehave = BINFILE_BIN; break; case 'u': case MMAP_OPT: filebehave = FILE_MMAP; break; case 'V': printf(errstr[8], getprogname(), VERSION); exit(0); case 'v': vflag = true; break; case 'w': wflag = true; cflags &= ~REG_NOSUB; break; case 'x': xflag = true; cflags &= ~REG_NOSUB; break; case 'z': fileeol = '\0'; break; case BIN_OPT: if (strcasecmp("binary", optarg) == 0) binbehave = BINFILE_BIN; else if (strcasecmp("without-match", optarg) == 0) binbehave = BINFILE_SKIP; else if (strcasecmp("text", optarg) == 0) binbehave = BINFILE_TEXT; else errx(2, errstr[2], "--binary-files"); break; case COLOR_OPT: color = NULL; if (optarg == NULL || strcasecmp("auto", optarg) == 0 || strcasecmp("tty", optarg) == 0 || strcasecmp("if-tty", optarg) == 0) { char *term; term = getenv("TERM"); if (isatty(STDOUT_FILENO) && term != NULL && strcasecmp(term, "dumb") != 0) color = init_color("01;31"); } else if (strcasecmp("always", optarg) == 0 || strcasecmp("yes", optarg) == 0 || strcasecmp("force", optarg) == 0) { color = init_color("01;31"); } else if (strcasecmp("never", optarg) != 0 && strcasecmp("none", optarg) != 0 && strcasecmp("no", optarg) != 0) errx(2, errstr[2], "--color"); cflags &= ~REG_NOSUB; break; case LABEL_OPT: label = optarg; break; case LINEBUF_OPT: lbflag = true; break; case NULL_OPT: nullflag = true; break; case R_INCLUDE_OPT: finclude = true; add_fpattern(optarg, INCL_PAT); break; case R_EXCLUDE_OPT: fexclude = true; add_fpattern(optarg, EXCL_PAT); break; case R_DINCLUDE_OPT: dinclude = true; add_dpattern(optarg, INCL_PAT); break; case R_DEXCLUDE_OPT: dexclude = true; add_dpattern(optarg, EXCL_PAT); break; case HELP_OPT: default: usage(); } lastc = c; newarg = optind != prevoptind; prevoptind = optind; } aargc -= optind; aargv += optind; + /* xflag takes precedence, don't confuse the matching bits. */ + if (wflag && xflag) + wflag = false; + /* Fail if we don't have any pattern */ if (aargc == 0 && needpattern) usage(); /* Process patterns from command line */ if (aargc != 0 && needpattern) { char *token; char *string = *aargv; while ((token = strsep(&string, "\n")) != NULL) add_pattern(token, strlen(token)); --aargc; ++aargv; } switch (grepbehave) { case GREP_BASIC: break; case GREP_FIXED: /* * regex(3) implementations that support fixed-string searches generally * define either REG_NOSPEC or REG_LITERAL. Set the appropriate flag * here. If neither are defined, GREP_FIXED later implies that the * internal literal matcher should be used. Other cflags that have * the same interpretation as REG_NOSPEC and REG_LITERAL should be * similarly added here, and grep.h should be amended to take this into * consideration when defining WITH_INTERNAL_NOSPEC. */ #if defined(REG_NOSPEC) cflags |= REG_NOSPEC; #elif defined(REG_LITERAL) cflags |= REG_LITERAL; #endif break; case GREP_EXTENDED: cflags |= REG_EXTENDED; break; default: /* NOTREACHED */ usage(); } r_pattern = grep_calloc(patterns, sizeof(*r_pattern)); #ifdef WITH_INTERNAL_NOSPEC if (grepbehave != GREP_FIXED) { #else { #endif /* Check if cheating is allowed (always is for fgrep). */ for (i = 0; i < patterns; ++i) { c = regcomp(&r_pattern[i], pattern[i].pat, cflags); if (c != 0) { regerror(c, &r_pattern[i], re_error, RE_ERROR_BUF); errx(2, "%s", re_error); } } } if (lbflag) setlinebuf(stdout); if ((aargc == 0 || aargc == 1) && !Hflag) hflag = true; initqueue(); if (aargc == 0 && dirbehave != DIR_RECURSE) exit(!procfile("-")); if (dirbehave == DIR_RECURSE) matched = grep_tree(aargv); else for (matched = false; aargc--; ++aargv) { if ((finclude || fexclude) && !file_matching(*aargv)) continue; if (procfile(*aargv)) matched = true; } if (Lflag) matched = !matched; /* * Calculate the correct return value according to the * results and the command line option. */ exit(matched ? (file_err ? (qflag ? 0 : 2) : 0) : (file_err ? 2 : 1)); }