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grep: Fix -v output and exit status 

Previously, it printed lines that didn't match some pattern. Instead,
it should print lines that don't match *any* pattern.

Test case:

out=$(echo foo | ./grep -v -e foo -e bar)
if [ "$?" = 1 ] && [ -z "$out" ] ; then
	echo pass
else
	echo fail
fi
This commit is contained in:
Michael Forney 2016-05-13 23:34:52 -07:00 committed by sin
parent e6b3af07cf
commit 0ba879cdba
1 changed files with 15 additions and 13 deletions
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28
grep.c
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@ -113,25 +113,28 @@ grep(FILE *fp, const char *str)
/* Remove the trailing newline if one is present. */
if (len && buf[len - 1] == '\n')
buf[len - 1] = '\0';
match = 0;
SLIST_FOREACH(pnode, &phead, entry) {
if (Fflag) {
if (xflag) {
if (!(iflag ? strcasecmp : strcmp)(buf, pnode->pattern))
match = Match;
else
match = NoMatch;
if (!(iflag ? strcasecmp : strcmp)(buf, pnode->pattern)) {
match = 1;
break;
}
} else {
if ((iflag ? strcasestr : strstr)(buf, pnode->pattern))
match = Match;
else
match = NoMatch;
if ((iflag ? strcasestr : strstr)(buf, pnode->pattern)) {
match = 1;
break;
}
}
if (match ^ vflag)
continue;
} else {
if (regexec(&pnode->preg, buf, 0, NULL, 0) ^ vflag)
continue;
if (regexec(&pnode->preg, buf, 0, NULL, 0) == 0) {
match = 1;
break;
}
}
}
if (match != vflag) {
switch (mode) {
case 'c':
c++;
@ -150,7 +153,6 @@ grep(FILE *fp, const char *str)
break;
}
result = Match;
break;
}
}
if (mode == 'c')