diff options
Diffstat (limited to 'toys/posix')
| -rw-r--r-- | toys/posix/grep.c | 59 |
1 files changed, 40 insertions, 19 deletions
diff --git a/toys/posix/grep.c b/toys/posix/grep.c index d1452cec..c63c1f87 100644 --- a/toys/posix/grep.c +++ b/toys/posix/grep.c @@ -4,11 +4,11 @@ * * See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/grep.html * - * TODO: --color, "Binary file %s matches" + * TODO: --color * * Posix doesn't even specify -r, documenting deviations from it is silly. -USE_GREP(NEWTOY(grep, "S(exclude)*M(include)*C#B#A#ZzEFHabhinorsvwclqe*f*m#x[!wx][!EFw]", TOYFLAG_BIN)) +USE_GREP(NEWTOY(grep, "S(exclude)*M(include)*C#B#A#ZzEFHIabhinorsvwclqe*f*m#x[!wx][!EFw]", TOYFLAG_BIN)) USE_EGREP(OLDTOY(egrep, grep, TOYFLAG_BIN)) USE_FGREP(OLDTOY(fgrep, grep, TOYFLAG_BIN)) @@ -29,14 +29,15 @@ config GREP -r Recurse into subdirectories (defaults FILE to ".") -M Match filename pattern (--include) -S Skip filename pattern (--exclude) + -I Ignore binary files match type: -A Show NUM lines after -B Show NUM lines before match -C NUM lines context (A+B) -E extended regex syntax - -F fixed (literal match) -i case insensitive - -m match MAX many lines -v invert match - -w whole word (implies -E) -x whole line - -z input NUL terminated + -F fixed (literal match) -a always text (not binary) + -i case insensitive -m match MAX many lines + -v invert match -w whole word (implies -E) + -x whole line -z input NUL terminated display modes: (default: matched line) -c count of matching lines -l show matching filenames @@ -90,41 +91,58 @@ static void outline(char *line, char dash, char *name, long lcount, long bcount, // Show matches in one file static void do_grep(int fd, char *name) { - struct double_list *dlb = 0; - FILE *file = fdopen(fd, "r"); long lcount = 0, mcount = 0, offset = 0, after = 0, before = 0; + struct double_list *dlb = 0; char *bars = 0; + FILE *file; + int bin = 0; if (!fd) name = "(standard input)"; - if (!file) { - perror_msg("%s", name); - - return; + // Only run binary file check on lseekable files. + if (!(toys.optflags&FLAG_a) && !lseek(fd, 0, SEEK_CUR)) { + char buf[256]; + int len, i = 0; + wchar_t wc; + + // If the first 256 bytes don't parse as utf8, call it binary. + if (0<(len = read(fd, buf, 256))) { + lseek(fd, -len, SEEK_CUR); + while (i<len) { + bin = utf8towc(&wc, buf+i, len-i); + if (bin == -2) i = len; + if (bin<1) break; + i += bin; + } + bin = i!=len; + } + if (bin && (toys.optflags&FLAG_I)) return; } + if (!(file = fdopen(fd, "r"))) return perror_msg("%s", name); + // Loop through lines of input for (;;) { char *line = 0, *start; regmatch_t matches; - size_t unused; + size_t ulen; long len; int mmatch = 0; lcount++; errno = 0; - len = getdelim(&line, &unused, TT.indelim, file); + ulen = len = getdelim(&line, &ulen, TT.indelim, file); if (errno) perror_msg("%s", name); if (len<1) break; - if (line[len-1] == TT.indelim) line[len-1] = 0; + if (line[ulen-1] == TT.indelim) line[--ulen] = 0; start = line; - // Loop through matches in this line + // Loop to handle multiple matches in same line do { int rc = 0, skip = 0; - // Handle non-regex matches + // Handle "fixed" (literal) matches if (toys.optflags & FLAG_F) { struct arg_list *seek, fseek; char *s = 0; @@ -148,8 +166,10 @@ static void do_grep(int fd, char *name) matches.rm_so = (s-line); skip = matches.rm_eo = (s-line)+strlen(seek->arg); } else rc = 1; + + // Handle regex matches } else { - rc = regexec((regex_t *)toybuf, start, 1, &matches, + rc = regexec0((void *)toybuf, start, ulen-(start-line), 1, &matches, start==line ? 0 : REG_NOTBOL); skip = matches.rm_eo; } @@ -214,7 +234,8 @@ static void do_grep(int fd, char *name) long bcount = 1 + offset + (start-line) + ((toys.optflags & FLAG_o) ? matches.rm_so : 0); - if (!(toys.optflags & FLAG_o)) { + if (bin) printf("Binary file %s matches\n", name); + else if (!(toys.optflags & FLAG_o)) { while (dlb) { struct double_list *dl = dlist_pop(&dlb); |