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Check return code from open()

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This commit is contained in:
Simon Kelley
2016-03-01 16:19:23 +00:00
parent aa300f7167
commit f7cf749943
1 changed files with 7 additions and 4 deletions
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3
src/dnsmasq.c
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@@ -561,11 +561,14 @@ int main (int argc, char **argv)
{ {
/* open stdout etc to /dev/null */ /* open stdout etc to /dev/null */
int nullfd = open("/dev/null", O_RDWR); int nullfd = open("/dev/null", O_RDWR);
if (nullfd != -1)
{
dup2(nullfd, STDOUT_FILENO); dup2(nullfd, STDOUT_FILENO);
dup2(nullfd, STDERR_FILENO); dup2(nullfd, STDERR_FILENO);
dup2(nullfd, STDIN_FILENO); dup2(nullfd, STDIN_FILENO);
close(nullfd); close(nullfd);
} }
}
/* if we are to run scripts, we need to fork a helper before dropping root. */ /* if we are to run scripts, we need to fork a helper before dropping root. */
daemon->helperfd = -1; daemon->helperfd = -1;