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-rw-r--r--toys/pending/grep.c141
1 files changed, 78 insertions, 63 deletions
diff --git a/toys/pending/grep.c b/toys/pending/grep.c
index 8810580b..ed13c393 100644
--- a/toys/pending/grep.c
+++ b/toys/pending/grep.c
@@ -11,26 +11,28 @@ config GREP
bool "grep"
default n
help
- usage: grep [-clq] [-EFHbhinosvw] (-e RE | -f REfile | RE) [file...]
-
- modes:
- default: print lines from each file what match regular expression RE.
- -c: print the number of matching lines in each file.
- -l: print all matching file names.
- -q: print nil; quit with code 0 when match found.
-
- flags:
- -E: extended RE syntax
- -F: fixed RE syntax, i.e. all characters literal
- -H: print file name
- -b: print byte offset of match
- -h: not print file name
- -i: case insensitive
- -n: print line numbers
- -o: print only matching part
- -s: keep silent on error
- -v: invert match
- -w: match full word only
+ usage: grep [-EFivw] [-cloqs] [-Hbhn] [-e REGEX]... [-f FILENAME] [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 -v invert match
+ -w whole words (implies -E)
+
+ 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
@@ -45,7 +47,8 @@ GLOBALS(
char mode, *re_xs;
)
-static void do_grep (int fd, char *name) {
+static void do_grep(int fd, char *name)
+{
int n = 0, nMatch = 0, which = toys.optflags & FLAG_w ? 2 : 0;
for (;;) {
@@ -53,112 +56,124 @@ static void do_grep (int fd, char *name) {
regmatch_t matches[3];
int atBOL = 1;
- x = get_rawline (fd, 0, '\n');
+ x = get_rawline(fd, 0, '\n');
if (!x) break;
y = x;
n++; /* start at 1 */
- while (regexec (&re, y, 3, matches, atBOL ? 0 : REG_NOTBOL) == 0) {
+ while (regexec (&re, y, 3, matches, atBOL ? 0 : REG_NOTBOL) == 0)
+ {
if (atBOL) nMatch++;
toys.exitval = 0;
atBOL = 0;
switch (TT.mode) {
case 'q':
- xexit ();
+ xexit();
case 'l':
- if (!(toys.optflags & FLAG_h)) printf ("%s\n", name);
- free (x);
+ if (!(toys.optflags & FLAG_h)) printf("%s\n", name);
+ free(x);
return;
case 'c':
break;
default:
- if (!(toys.optflags & FLAG_h)) printf ("%s:", name);
- if ( (toys.optflags & FLAG_n)) printf ("%d:", n);
- if ( (toys.optflags & FLAG_b)) printf ("%ld:", lseek (0, 0, SEEK_CUR) - strlen (y) +
- (toys.optflags & FLAG_o ? matches[which].rm_so : 0));
- if (!(toys.optflags & FLAG_o)) fputs (x, stdout);
+ if (!(toys.optflags & FLAG_h)) printf("%s:", name);
+ if ((toys.optflags & FLAG_n)) printf("%d:", n);
+ if ((toys.optflags & FLAG_b))
+ printf("%ld:", lseek (0, 0, SEEK_CUR) - strlen (y) +
+ (toys.optflags & FLAG_o ? matches[which].rm_so : 0));
+ if (!(toys.optflags & FLAG_o)) fputs(x, stdout);
else {
y += matches[which].rm_so;
- printf ("%.*s\n", matches[which].rm_eo - matches[which].rm_so, y++);
+ printf("%.*s\n", matches[which].rm_eo - matches[which].rm_so, y++);
}
}
if (!(toys.optflags & FLAG_o)) break;
}
- free (x);
+ free(x);
if ((toys.optflags & FLAG_m) && nMatch >= TT.mArgu) break;
}
- if (TT.mode == 'c') printf ("%s:%d\n", name, nMatch);
+ if (TT.mode == 'c') printf("%s:%d\n", name, nMatch);
}
-char *regfix (char *re_xs) {
+char *regfix(char *re_xs)
+{
char *re_ys;
int ii, jj = 0;
- re_ys = xmalloc (2*strlen (re_xs) + 1);
+
+ re_ys = xmalloc(2*strlen (re_xs) + 1);
for (ii = 0; re_xs[ii]; ii++) {
- if (strchr ("^.[]$()|*+?{}\\", re_xs[ii])) re_ys[jj++] = '\\';
+ if (strchr("^.[]$()|*+?{}\\", re_xs[ii])) re_ys[jj++] = '\\';
re_ys[jj++] = re_xs[ii];
}
re_ys[jj] = 0;
+
return re_ys;
}
-void addRE (char *x) {
- if (toys.optflags & FLAG_F) x = regfix (x);
- if (TT.re_xs) TT.re_xs = xastrcat (TT.re_xs, "|");
- TT.re_xs = xastrcat (TT.re_xs, x);
- if (toys.optflags & FLAG_F) free (x);
+void addRE(char *x)
+{
+ if (toys.optflags & FLAG_F) x = regfix(x);
+ if (TT.re_xs) TT.re_xs = xastrcat(TT.re_xs, "|");
+ TT.re_xs = xastrcat(TT.re_xs, x);
+ if (toys.optflags & FLAG_F) free(x);
}
-void buildRE (void) {
- for (; TT.eArgu; TT.eArgu = TT.eArgu -> next) addRE (TT.eArgu -> arg);
+void buildRE(void)
+{
+ for (; TT.eArgu; TT.eArgu = TT.eArgu -> next) addRE(TT.eArgu -> arg);
for (; TT.fArgu; TT.fArgu = TT.fArgu -> next) {
FILE *f;
char *x, *y;
size_t l;
- f = xfopen (TT.fArgu -> arg, "r");
+ f = xfopen(TT.fArgu -> arg, "r");
x = 0;
for (;;) {
if (getline (&x, &l, f) < 0) {
- if (feof (f)) break;
+ if (feof(f)) break;
toys.exitval = 2;
- perror_exit ("failed to read");
+ perror_exit("failed to read");
}
- y = x + strlen (x) - 1;
+ y = x + strlen(x) - 1;
if (y[0] == '\n') y[0] = 0;
- addRE (x);
+ addRE(x);
}
- free (x);
- fclose (f);
+ free(x);
+ fclose(f);
}
if (!TT.re_xs) {
if (toys.optc < 1) {
toys.exitval = 2;
- error_exit ("no RE");
+ error_exit("no RE");
}
- TT.re_xs = toys.optflags & FLAG_F ? regfix (toys.optargs[0]) : toys.optargs[0];
+ TT.re_xs = (toys.optflags & FLAG_F) ? regfix(toys.optargs[0])
+ : toys.optargs[0];
toys.optc--; toys.optargs++;
}
- TT.re_xs = xmsprintf (toys.optflags & FLAG_w ? "(^|[^_[:alnum:]])(%s)($|[^_[:alnum:]])" : "%s", TT.re_xs);
+ TT.re_xs = xmsprintf((toys.optflags & FLAG_w)
+ ? "(^|[^_[:alnum:]])(%s)($|[^_[:alnum:]])" : "%s", TT.re_xs);
- if (regcomp (&re, TT.re_xs,
- (toys.optflags & (FLAG_E | FLAG_F) ? REG_EXTENDED : 0) |
- (toys.optflags & FLAG_i ? REG_ICASE : 0)) != 0) {
+ if (regcomp(&re, TT.re_xs,
+ ((toys.optflags & (FLAG_E | FLAG_F)) ? REG_EXTENDED : 0) |
+ ((toys.optflags & FLAG_i) ? REG_ICASE : 0)) != 0) {
toys.exitval = 2;
- error_exit ("bad RE");
+ error_exit("bad RE");
}
}
-void grep_main (void) {
- if (toys.optflags & FLAG_w && !(toys.optflags & FLAG_E || toys.optflags & FLAG_F)) error_exit ("must not use -w sans -E");
+void grep_main(void)
+{
+ if ((toys.optflags & FLAG_w)
+ && !(toys.optflags & FLAG_E || toys.optflags & FLAG_F))
+ error_exit ("must not use -w sans -E");
- buildRE ();
+ buildRE();
if (toys.optflags & FLAG_c) TT.mode = 'c';
if (toys.optflags & FLAG_l) TT.mode = 'l';
@@ -167,6 +182,6 @@ void grep_main (void) {
if (!(toys.optflags & FLAG_H) && (toys.optc < 2)) toys.optflags |= FLAG_h;
toys.exitval = 1;
- loopfiles_rw (toys.optargs, O_RDONLY, 0, toys.optflags & FLAG_s, do_grep);
- xexit ();
+ loopfiles_rw(toys.optargs, O_RDONLY, 0, toys.optflags & FLAG_s, do_grep);
+ xexit();
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 15:51:04 +0000