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log: Redirect stderr to logfile if deamonized

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In case of daemonize, use the logfile passed with the -D option in
order to redirect stderr to it instead of /dev/null.

Also remove some unused code in log.h.

Signed-off-by: Dimitris Aragiorgis <dimara@arrikto.com>
Message-Id: <1455795518-19205-1-git-send-email-dimara@arrikto.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Dimitris Aragiorgis 2016-02-18 13:38:38 +02:00 • committed by Paolo Bonzini
parent d42a0d1484
commit 96c33a4523
3 changed files with 14 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

11
util/log.c
View file

@ -56,13 +56,20 @@ void do_qemu_set_log(int log_flags, bool use_own_buffers)
#ifdef CONFIG_TRACE_LOG
qemu_loglevel |= LOG_TRACE;
#endif
if (qemu_loglevel && !qemu_logfile) {
if ((qemu_loglevel || is_daemonized()) && !qemu_logfile) {
if (logfilename) {
qemu_logfile = fopen(logfilename, log_append ? "a" : "w");
if (!qemu_logfile) {
perror(logfilename);
_exit(1);
}
/* In case we are a daemon redirect stderr to logfile */
if (is_daemonized()) {
dup2(fileno(qemu_logfile), STDERR_FILENO);
fclose(qemu_logfile);
/* This will skip closing logfile in qemu_log_close() */
qemu_logfile = stderr;
}
} else {
/* Default to stderr if no log file specified */
qemu_logfile = stderr;
@ -82,7 +89,7 @@ void do_qemu_set_log(int log_flags, bool use_own_buffers)
log_append = 1;
}
}
if (!qemu_loglevel && qemu_logfile) {
if (!qemu_loglevel && !is_daemonized() && qemu_logfile) {
qemu_log_close();
}
}