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qemu-pr-helper: Daemonize before dropping privileges

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After we've dropped privileges it might be not possible to write
pidfile. For instance, if this binary is run as root (because
user wants it to write pidfile to some privileged location)
writing pidfile fails because privileges are dropped before we
even get to that.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Michal Privoznik 2018-04-03 15:12:14 +02:00 • committed by Paolo Bonzini
parent 9f91022f28
commit 8dc0bf2647
1 changed files with 7 additions and 7 deletions
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14
scsi/qemu-pr-helper.c
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@ -1081,13 +1081,6 @@ int main(int argc, char **argv)
accept_client,
NULL, NULL);
#ifdef CONFIG_LIBCAP
if (drop_privileges() < 0) {
error_report("Failed to drop privileges: %s", strerror(errno));
exit(EXIT_FAILURE);
}
#endif
if (daemonize) {
if (daemon(0, 0) < 0) {
error_report("Failed to daemonize: %s", strerror(errno));
@ -1096,6 +1089,13 @@ int main(int argc, char **argv)
write_pidfile();
}
#ifdef CONFIG_LIBCAP
if (drop_privileges() < 0) {
error_report("Failed to drop privileges: %s", strerror(errno));
exit(EXIT_FAILURE);
}
#endif
state = RUNNING;
do {
main_loop_wait(false);