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| author | Lauri Kasanen <curaga@operamail.com> | 2011-08-28 12:39:04 +0200 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2011-08-28 12:39:04 +0200 |
| commit | 7b46220d922d7c6267a8442ff8c3a6d1ab106727 (patch) | |
| tree | 599a640d94d61d38350d127c36cb234871e213ba /findutils/grep.c | |
| parent | 2390109dcbc7769c8cc373db32805206522ca9a6 (diff) | |
| download | busybox-7b46220d922d7c6267a8442ff8c3a6d1ab106727.tar.gz | |
grep: be GNU compatible with -f EMPTY_FILE
Signed-off-by: Lauri Kasanen <curaga@operamail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'findutils/grep.c')
| -rw-r--r-- | findutils/grep.c | 22 |
1 files changed, 13 insertions, 9 deletions
diff --git a/findutils/grep.c b/findutils/grep.c index 3acfa9197..5f4224203 100644 --- a/findutils/grep.c +++ b/findutils/grep.c @@ -562,20 +562,20 @@ static char *add_grep_list_data(char *pattern) static void load_regexes_from_file(llist_t *fopt) { - char *line; - FILE *f; - while (fopt) { + char *line; + FILE *fp; llist_t *cur = fopt; char *ffile = cur->data; fopt = cur->link; free(cur); - f = xfopen_stdin(ffile); - while ((line = xmalloc_fgetline(f)) != NULL) { + fp = xfopen_stdin(ffile); + while ((line = xmalloc_fgetline(fp)) != NULL) { llist_add_to(&pattern_head, new_grep_list_data(line, ALLOCATED)); } + fclose_if_not_stdin(fp); } } @@ -659,15 +659,19 @@ int grep_main(int argc UNUSED_PARAM, char **argv) #endif invert_search = ((option_mask32 & OPT_v) != 0); /* 0 | 1 */ - if (pattern_head != NULL) { - /* convert char **argv to grep_list_data_t */ + { /* convert char **argv to grep_list_data_t */ llist_t *cur; - for (cur = pattern_head; cur; cur = cur->link) cur->data = new_grep_list_data(cur->data, 0); } - if (option_mask32 & OPT_f) + if (option_mask32 & OPT_f) { load_regexes_from_file(fopt); + if (!pattern_head) { /* -f EMPTY_FILE? */ + /* GNU grep treats it as "nothing matches" */ + llist_add_to(&pattern_head, new_grep_list_data((char*) "", 0)); + invert_search ^= 1; + } + } if (ENABLE_FEATURE_GREP_FGREP_ALIAS && applet_name[0] == 'f') option_mask32 |= OPT_F; |