From 9a9c6e39ba4c8f4f2cecb147c7e6464bec2d8b55 Mon Sep 17 00:00:00 2001 From: Ari Sundholm Date: Tue, 29 Jan 2019 14:42:57 +0100 Subject: grep: fix -x -v with certain pattern orders We found out that busybox -x -v is a bit broken: ari@ari-thinkpad:~/busybox$ echo ' aa bb cc' | ./busybox grep -x -e 'aa.*' -e '.*bb.*' aa bb cc ari@ari-thinkpad:~/busybox$ echo ' aa bb cc' | ./busybox grep -x -v -e 'aa.*' -e '.*bb.*' ari@ari-thinkpad:~/busybox$ echo ' aa bb cc' | ./busybox grep -x -e '.*aa.*' -e 'bb.*' aa bb cc ari@ari-thinkpad:~/busybox$ echo ' aa bb cc' | ./busybox grep -x -v -e '.*aa.*' -e 'bb.*' aa bb cc Last one is wrong. This patch fixes the issue by making sure that the variable 'found' never makes a transition from 1 to 0, as this would mean that grep previously found a match on this input line. Signed-off-by: Ari Sundholm Signed-off-by: Niko Vähäsarja Signed-off-by: Denys Vlasenko --- findutils/grep.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'findutils') diff --git a/findutils/grep.c b/findutils/grep.c index a4033a4..9d9da42 100644 --- a/findutils/grep.c +++ b/findutils/grep.c @@ -404,7 +404,7 @@ static int grep_file(FILE *file) #endif ) { if (option_mask32 & OPT_x) { - found = (gl->matched_range.rm_so == 0 + found |= (gl->matched_range.rm_so == 0 && match_at[gl->matched_range.rm_eo] == '\0'); } else if (!(option_mask32 & OPT_w)) { -- cgit v1.1