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o confstr(3) returns 0 on error. Check the return value accordingly.

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PR:		misc/106414
MFC after:	1 week
This commit is contained in:
Maxim Konovalov 2006-12-06 12:00:26 +00:00
parent 8b0a738288
commit 37716191a8
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=164945
1 changed files with 10 additions and 6 deletions
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16
usr.bin/getconf/getconf.c
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@ -139,19 +139,23 @@ static void
do_confstr(const char *name, int key)
{
size_t len;
int savederr;
savederr = errno;
errno = 0;
len = confstr(key, 0, 0);
if (len == (size_t)-1)
err(EX_OSERR, "confstr: %s", name);
if (len == 0)
printf("undefined\n");
else {
if (len == 0) {
if (errno)
err(EX_OSERR, "confstr: %s", name);
else
printf("undefined\n");
} else {
char buf[len + 1];
confstr(key, buf, len);
printf("%s\n", buf);
}
errno = savederr;
}
static void