aboutsummaryrefslogtreecommitdiff
path: root/toys/pending/grep.c
diff options
context:
space:
mode:
Diffstat (limited to 'toys/pending/grep.c')
-rw-r--r--toys/pending/grep.c286
1 files changed, 0 insertions, 286 deletions
diff --git a/toys/pending/grep.c b/toys/pending/grep.c
deleted file mode 100644
index bc884528..00000000
--- a/toys/pending/grep.c
+++ /dev/null
@@ -1,286 +0,0 @@
-/* grep.c - print lines what match given regular expression
- *
- * Copyright 2013 CE Strake <strake888 at gmail.com>
- *
- * See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/grep.html
-
-USE_GREP(NEWTOY(grep, "EFHabhinorsvwclqe*f*m#x[!wx][!EFw]", TOYFLAG_BIN))
-USE_GREP(OLDTOY(egrep, grep, OPTSTR_grep, TOYFLAG_BIN))
-USE_GREP(OLDTOY(fgrep, grep, OPTSTR_grep, TOYFLAG_BIN))
-
-config GREP
- bool "grep"
- default n
- help
- usage: grep [-EFivwcloqsHbhn] [-m MAX] [-e REGEX]... [-f REGFILE] [FILE]...
-
- Show lines matching regular expressions. If no -e, first argument is
- regular expression to match. With no files (or "-" filename) read stdin.
- Returns 0 if matched, 1 if no match found.
-
- -e Regex to match. (May be repeated.)
- -f File containing regular expressions to match.
-
- match type:
- -E extended regex syntax -F fixed (match literal string)
- -i case insensitive -m stop after this many lines matched
- -r recursive (on dir) -v invert match
- -w whole word (implies -E) -x whole line
-
- display modes: (default: matched line)
- -c count of matching lines -l show matching filenames
- -o only matching part -q quiet (errors only)
- -s silent (no error msg)
-
- prefix modes (default: filename if checking more than 1 file)
- -H force filename -b byte offset of match
- -h hide filename -n line number of match
-*/
-
-#define FOR_grep
-#include "toys.h"
-#include <regex.h>
-
-GLOBALS(
- long m;
- struct arg_list *f;
- struct arg_list *e;
-
- struct arg_list *regex;
-)
-
-static void do_grep(int fd, char *name)
-{
- FILE *file = fdopen(fd, "r");
- long offset = 0;
- int lcount = 0, mcount = 0, which = toys.optflags & FLAG_w ? 2 : 0;
-
- if (!fd) name = "(standard input)";
-
- if (!file) {
- perror_msg("%s", name);
- return;
- }
-
- for (;;) {
- char *line = 0, *start;
- regmatch_t matches[3];
- size_t unused;
- long len;
- int mmatch = 0;
-
- lcount++;
- if (0 > (len = getline(&line, &unused, file))) break;
- if (line[len-1] == '\n') line[len-1] = 0;
-
- start = line;
-
- for (;;)
- {
- int rc = 0, skip = 0;
-
- if (toys.optflags & FLAG_F) {
- struct arg_list *seek, fseek;
- char *s = 0;
-
- for (seek = TT.e; seek; seek = seek->next) {
- if (!*seek->arg) {
- seek = &fseek;
- fseek.arg = s = line;
- break;
- }
- if (toys.optflags & FLAG_i) {
- long ll = strlen(seek->arg);;
-
- // Alas, posix hasn't got strcasestr()
- for (s = line; *s; s++) if (!strncasecmp(s, seek->arg, ll)) break;
- if (!*s) s = 0;
- } else s = strstr(line, seek->arg);
- if (s) break;
- }
-
- if (s) {
- matches[which].rm_so = (s-line);
- skip = matches[which].rm_eo = (s-line)+strlen(seek->arg);
- } else rc = 1;
- } else {
- rc = regexec((regex_t *)toybuf, start, 3, matches,
- start==line ? 0 : REG_NOTBOL);
- skip = matches[which].rm_eo;
- }
-
- if (toys.optflags & FLAG_x)
- if (matches[which].rm_so || line[matches[which].rm_eo]) rc = 1;
-
- if (toys.optflags & FLAG_v) {
- if (toys.optflags & FLAG_o) {
- if (rc) skip = matches[which].rm_eo = strlen(start);
- else if (!matches[which].rm_so) {
- start += skip;
- continue;
- } else matches[which].rm_eo = matches[which].rm_so;
- } else {
- if (!rc) break;
- matches[which].rm_eo = strlen(start);
- }
- matches[which].rm_so = 0;
- } else if (rc) break;
-
- mmatch++;
- if (toys.optflags & FLAG_q) {
- toys.exitval = 0;
- xexit();
- }
- if (toys.optflags & FLAG_l) {
- printf("%s\n", name);
- free(line);
- fclose(file);
- return;
- }
- if (toys.optflags & FLAG_o)
- if (matches[which].rm_eo == matches[which].rm_so)
- break;
-
- if (!(toys.optflags & FLAG_c)) {
- if (toys.optflags & FLAG_H) printf("%s:", name);
- if (toys.optflags & FLAG_n) printf("%d:", lcount);
- if (toys.optflags & FLAG_b)
- printf("%ld:", offset + (start-line) +
- ((toys.optflags & FLAG_o) ? matches[which].rm_so : 0));
- if (!(toys.optflags & FLAG_o)) xputs(line);
- else {
- xprintf("%.*s\n", matches[which].rm_eo - matches[which].rm_so,
- start + matches[which].rm_so);
- }
- }
-
- start += skip;
- if (!(toys.optflags & FLAG_o) || !*start) break;
- }
- offset += len;
-
- free(line);
-
- if (mmatch) mcount++;
- if ((toys.optflags & FLAG_m) && mcount >= TT.m) break;
- }
-
- if (toys.optflags & FLAG_c) {
- if (toys.optflags & FLAG_H) printf("%s:", name);
- xprintf("%d\n", mcount);
- }
-
- // loopfiles will also close the fd, but this frees an (opaque) struct.
- fclose(file);
-}
-
-static void parse_regex(void)
-{
- struct arg_list *al, *new, *list = NULL;
- long len = 0;
- char *s, *ss;
-
- // Add all -f lines to -e list. (Yes, this is leaking allocation context for
- // exit to free. Not supporting nofork for this command any time soon.)
- al = TT.f ? TT.f : TT.e;
- while (al) {
- if (TT.f) s = ss = xreadfile(al->arg);
- else s = ss = al->arg;
-
- do {
- ss = strchr(s, '\n');
- if (ss) *(ss++) = 0;
- new = xmalloc(sizeof(struct arg_list));
- new->next = list;
- new->arg = s;
- list = new;
- s = ss;
- } while (ss && *s);
- al = al->next;
- if (!al && TT.f) {
- TT.f = 0;
- al = TT.e;
- }
- }
- TT.e = list;
-
- if (!(toys.optflags & FLAG_F)) {
- int w = toys.optflags & FLAG_w;
- char *regstr;
-
- // Convert strings to one big regex
- if (w) len = 36;
- for (al = TT.e; al; al = al->next) len += strlen(al->arg)+1;
-
- regstr = s = xmalloc(len);
- if (w) s = stpcpy(s, "(^|[^_[:alnum:]])(");
- for (al = TT.e; al; al = al->next) {
- s = stpcpy(s, al->arg);
- if (!(toys.optflags & FLAG_E)) *(s++) = '\\';
- *(s++) = '|';
- }
- *(s-=(1+!(toys.optflags & FLAG_E))) = 0;
- if (w) strcpy(s, ")($|[^_[:alnum:]])");
-
- w = regcomp((regex_t *)toybuf, regstr,
- ((toys.optflags & FLAG_E) ? REG_EXTENDED : 0) |
- ((toys.optflags & FLAG_i) ? REG_ICASE : 0));
-
- if (w) {
- regerror(w, (regex_t *)toybuf, toybuf+sizeof(regex_t),
- sizeof(toybuf)-sizeof(regex_t));
- error_exit("bad REGEX: %s", toybuf);
- }
- }
-}
-
-static int do_grep_r(struct dirtree *new)
-{
- char *name;
-
- if (new->parent && !dirtree_notdotdot(new)) return 0;
- if (S_ISDIR(new->st.st_mode)) return DIRTREE_RECURSE;
-
- // "grep -r onefile" doesn't show filenames, but "grep -r onedir" should.
- if (new->parent && !(toys.optflags & FLAG_h)) toys.optflags |= FLAG_H;
-
- name = dirtree_path(new, 0);
- do_grep(openat(dirtree_parentfd(new), new->name, 0), name);
- free(name);
-
- return 0;
-}
-
-void grep_main(void)
-{
- char **ss;
-
- // Handle egrep and fgrep
- if (*toys.which->name == 'e' || (toys.optflags & FLAG_w))
- toys.optflags |= FLAG_E;
- if (*toys.which->name == 'f') toys.optflags |= FLAG_F;
-
- if (!TT.e && !TT.f) {
- if (!*toys.optargs) error_exit("no REGEX");
- TT.e = xzalloc(sizeof(struct arg_list));
- TT.e->arg = *(toys.optargs++);
- toys.optc--;
- }
-
- parse_regex();
-
- if (!(toys.optflags & FLAG_h) && toys.optc>1) toys.optflags |= FLAG_H;
-
- toys.exitval = 1;
- if (toys.optflags & FLAG_s) {
- close(2);
- xopen("/dev/null", O_RDWR);
- }
-
- if (toys.optflags & FLAG_r) {
- for (ss=toys.optargs; *ss; ss++) {
- if (!strcmp(*ss, "-")) do_grep(0, *ss);
- else dirtree_read(*ss, do_grep_r);
- }
- } else loopfiles_rw(toys.optargs, O_RDONLY, 0, 1, do_grep);
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 06:29:08 +0000