diff options
| -rw-r--r-- | toys/posix/grep.c | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/toys/posix/grep.c b/toys/posix/grep.c index 6fd6bd2f..f2ab2a0d 100644 --- a/toys/posix/grep.c +++ b/toys/posix/grep.c @@ -398,20 +398,15 @@ static void parse_regex(void) TT.e = list; if (!FLAG(F)) { - int i; - // Convert regex list for (al = TT.e; al; al = al->next) { struct reg *shoe; if (FLAG(o) && !*al->arg) continue; dlist_add_nomalloc(&TT.reg, (void *)(shoe = xmalloc(sizeof(struct reg)))); - i = regcomp(&shoe->r, al->arg, - (REG_EXTENDED*!!FLAG(E)) | (REG_ICASE*!!FLAG(i))); - if (i) { - regerror(i, &shoe->r, toybuf, sizeof(toybuf)); - error_exit("bad REGEX '%s': %s", al->arg, toybuf); - } + // BSD regcomp doesn't support empty regex, so we fake that. + xregcomp(&shoe->r, *al->arg ? al->arg : "()", + (REG_EXTENDED*(!!FLAG(E)|!*al->arg))|(REG_ICASE*!!FLAG(i))); } dlist_terminate(TT.reg); } |