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-rwxr-xr-xtests/grep.test11
-rw-r--r--toys/posix/grep.c83
2 files changed, 58 insertions, 36 deletions
diff --git a/tests/grep.test b/tests/grep.test
index 13b1af78..f3bc9a3b 100755
--- a/tests/grep.test
+++ b/tests/grep.test
@@ -42,8 +42,8 @@ testing "grep -o" "grep -o is input" "is\nis\nis\nis\n" \
testing "grep -s" "grep -hs hello asdf input 2>&1" "hello\n" "hello\n" ""
testing "grep -v" "grep -v abc input" "1234123asdfas123123\n1ABa\n" \
"1234123asdfas123123\n1ABabc\nabc\n1ABa\nabcde" ""
-testing "grep -w" "grep -w abc input" "abc\n" \
- "1234123asdfas123123\n1ABabc\nabc\n1ABa\nabcde" ""
+testing "grep -w" "grep -w abc input" "abc\n123 abc\nabc 123\n123 abc 456\n" \
+ "1234123asdfas123123\n1ABabc\nabc\n1ABa\nabcde\n123 abc\nabc 123\n123 abc 456\n" ""
testing "grep -x" "grep -x abc input" "abc\n" \
"aabcc\nabc\n" ""
@@ -84,15 +84,16 @@ testing "grep -r dir" "grep -r one sub | sort" "sub/one:one\nsub/two:one\n" \
"" ""
rm -rf sub
-# Not sure if -Fx '' should do? Posix is unclear, '' match every line but does
-# it match every _byte_ in that line?
-testing "grep -Fx ''" "grep -Fx '' input" "one one one\n" "one one one\n" ""
+# -x exact match trumps -F's "empty string matches whole line" behavior
+testing "grep -Fx ''" "grep -Fx '' input" "" "one one one\n" ""
testing "grep -F ''" "grep -F '' input" "one one one\n" "one one one\n" ""
testing "grep -F -e blah -e ''" "grep -F -e blah -e '' input" "one one one\n" \
"one one one\n" ""
testing "grep -e blah -e ''" "grep -e blah -e '' input" "one one one\n" \
"one one one\n" ""
testing "grep -w ''" "grep -w '' input" "" "one one one\n" ""
+testing "grep -w '' 2" "grep -w '' input" "one two\n" "one two\n" ""
+testing "grep -w \\1" "grep -wo '\\(x\\)\\1'" "xx\n" "" "xx"
testing "grep -o ''" "grep -o '' input" "" "one one one\n" ""
testing "grep backref" 'grep -e "a\(b\)" -e "b\(c\)\1"' "bcc\nab\n" \
"" "bcc\nbcb\nab\n"
diff --git a/toys/posix/grep.c b/toys/posix/grep.c
index ffc920c1..d44a92d6 100644
--- a/toys/posix/grep.c
+++ b/toys/posix/grep.c
@@ -3,6 +3,8 @@
* Copyright 2013 CE Strake <strake888 at gmail.com>
*
* See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/grep.html
+ *
+ * TODO: -ABC
USE_GREP(NEWTOY(grep, "ZzEFHabhinorsvwclqe*f*m#x[!wx][!EFw]", TOYFLAG_BIN))
USE_EGREP(OLDTOY(egrep, grep, TOYFLAG_BIN))
@@ -56,15 +58,14 @@ GLOBALS(
long m;
struct arg_list *f;
struct arg_list *e;
-
- struct arg_list *regex;
)
+// Show matches in one file
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;
+ int lcount = 0, mcount = 0;
char indelim = '\n' * !(toys.optflags&FLAG_z),
outdelim = '\n' * !(toys.optflags&FLAG_Z);
@@ -75,9 +76,10 @@ static void do_grep(int fd, char *name)
return;
}
+ // Loop through lines of input
for (;;) {
char *line = 0, *start;
- regmatch_t matches[3];
+ regmatch_t matches;
size_t unused;
long len;
int mmatch = 0;
@@ -88,10 +90,11 @@ static void do_grep(int fd, char *name)
start = line;
- for (;;)
- {
+ // Loop through matches in this line
+ do {
int rc = 0, skip = 0;
+ // Handle non-regex matches
if (toys.optflags & FLAG_F) {
struct arg_list *seek, fseek;
char *s = 0;
@@ -117,30 +120,48 @@ static void do_grep(int fd, char *name)
}
if (s) {
- matches[which].rm_so = (s-line);
- skip = matches[which].rm_eo = (s-line)+strlen(seek->arg);
+ matches.rm_so = (s-line);
+ skip = matches.rm_eo = (s-line)+strlen(seek->arg);
} else rc = 1;
} else {
- rc = regexec((regex_t *)toybuf, start, 3, matches,
+ rc = regexec((regex_t *)toybuf, start, 1, &matches,
start==line ? 0 : REG_NOTBOL);
- skip = matches[which].rm_eo;
+ skip = matches.rm_eo;
}
if (toys.optflags & FLAG_x)
- if (matches[which].rm_so || line[matches[which].rm_eo]) rc = 1;
+ if (matches.rm_so || line[matches.rm_eo]) rc = 1;
+
+ if (!rc && (toys.optflags & FLAG_w)) {
+ char c = 0;
+
+ if ((start+matches.rm_so)!=line) {
+ c = start[matches.rm_so-1];
+ if (!isalnum(c) && c != '_') c = 0;
+ }
+ if (!c) {
+ c = start[matches.rm_eo];
+ if (!isalnum(c) && c != '_') c = 0;
+ }
+ if (c) {
+ start += matches.rm_so+1;
+
+ continue;
+ }
+ }
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) {
+ if (rc) skip = matches.rm_eo = strlen(start);
+ else if (!matches.rm_so) {
start += skip;
continue;
- } else matches[which].rm_eo = matches[which].rm_so;
+ } else matches.rm_eo = matches.rm_so;
} else {
if (!rc) break;
- matches[which].rm_eo = strlen(start);
+ matches.rm_eo = strlen(start);
}
- matches[which].rm_so = 0;
+ matches.rm_so = 0;
} else if (rc) break;
mmatch++;
@@ -153,7 +174,7 @@ static void do_grep(int fd, char *name)
return;
}
if (toys.optflags & FLAG_o)
- if (matches[which].rm_eo == matches[which].rm_so)
+ if (matches.rm_eo == matches.rm_so)
break;
if (!(toys.optflags & FLAG_c)) {
@@ -161,17 +182,17 @@ static void do_grep(int fd, char *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));
+ ((toys.optflags & FLAG_o) ? matches.rm_so : 0));
if (!(toys.optflags & FLAG_o)) xprintf("%s%c", line, outdelim);
else {
- xprintf("%.*s%c", matches[which].rm_eo - matches[which].rm_so,
- start + matches[which].rm_so, outdelim);
+ xprintf("%.*s%c", matches.rm_eo - matches.rm_so,
+ start + matches.rm_so, outdelim);
}
}
start += skip;
- if (!(toys.optflags & FLAG_o) || !*start) break;
- }
+ if (!(toys.optflags & FLAG_o)) break;
+ } while (*start);
offset += len;
free(line);
@@ -202,6 +223,7 @@ static void parse_regex(void)
if (TT.f) s = ss = xreadfile(al->arg, 0, 0);
else s = ss = al->arg;
+ // Split lines at \n, add individual lines to new list.
do {
ss = strchr(s, '\n');
if (ss) *(ss++) = 0;
@@ -211,6 +233,8 @@ static void parse_regex(void)
list = new;
s = ss;
} while (ss && *s);
+
+ // Advance, when we run out of -f switch to -e.
al = al->next;
if (!al && TT.f) {
TT.f = 0;
@@ -220,30 +244,27 @@ static void parse_regex(void)
TT.e = list;
if (!(toys.optflags & FLAG_F)) {
- int w = toys.optflags & FLAG_w;
char *regstr;
+ int i;
// Convert strings to one big regex
- if (w) len = 36;
for (al = TT.e; al; al = al->next)
len += strlen(al->arg)+1+!(toys.optflags & FLAG_E);
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,
+ i = 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),
+ if (i) {
+ regerror(i, (regex_t *)toybuf, toybuf+sizeof(regex_t),
sizeof(toybuf)-sizeof(regex_t));
error_exit("bad REGEX: %s", toybuf);
}
@@ -272,8 +293,7 @@ void grep_main(void)
char **ss = toys.optargs;
// Handle egrep and fgrep
- if (*toys.which->name == 'e' || (toys.optflags & FLAG_w))
- toys.optflags |= FLAG_E;
+ if (*toys.which->name == 'e') toys.optflags |= FLAG_E;
if (*toys.which->name == 'f') toys.optflags |= FLAG_F;
if (!TT.e && !TT.f) {
@@ -294,6 +314,7 @@ void grep_main(void)
}
if (toys.optflags & FLAG_r) {
+ // Iterate through -r arguments. Use "." as default if none provided.
for (ss = *ss ? ss : (char *[]){".", 0}; *ss; ss++) {
if (!strcmp(*ss, "-")) do_grep(0, *ss);
else dirtree_read(*ss, do_grep_r);
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-23 19:47:06 +0000