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Check return code from open()

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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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11
src/dnsmasq.c
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@@ -561,10 +561,13 @@ int main (int argc, char **argv)
{
/* open stdout etc to /dev/null */
int nullfd = open("/dev/null", O_RDWR);
dup2(nullfd, STDOUT_FILENO);
dup2(nullfd, STDERR_FILENO);
dup2(nullfd, STDIN_FILENO);
close(nullfd);
if (nullfd != -1)
{
dup2(nullfd, STDOUT_FILENO);
dup2(nullfd, STDERR_FILENO);
dup2(nullfd, STDIN_FILENO);
close(nullfd);
}
}
/* if we are to run scripts, we need to fork a helper before dropping root. */