@@ -56,7 +56,8 @@ void do_qemu_set_log(int log_flags, bool use_own_buffers)
#ifdef CONFIG_TRACE_LOG
qemu_loglevel |= LOG_TRACE;
#endif
- if ((qemu_loglevel || is_daemonized()) && !qemu_logfile) {
+ if (!qemu_logfile &&
+ (is_daemonized() ? logfilename != NULL : qemu_loglevel)) {
if (logfilename) {
qemu_logfile = fopen(logfilename, log_append ? "a" : "w");
if (!qemu_logfile) {
@@ -72,6 +73,7 @@ void do_qemu_set_log(int log_flags, bool use_own_buffers)
}
} else {
/* Default to stderr if no log file specified */
+ assert(!is_daemonized());
qemu_logfile = stderr;
}
/* must avoid mmap() usage of glibc by setting a buffer "by hand" */
@@ -89,7 +91,8 @@ void do_qemu_set_log(int log_flags, bool use_own_buffers)
log_append = 1;
}
}
- if (!qemu_loglevel && !is_daemonized() && qemu_logfile) {
+ if (qemu_logfile &&
+ (is_daemonized() ? logfilename == NULL : !qemu_loglevel)) {
qemu_log_close();
}
}
Commit 96c33a4 ("log: Redirect stderr to logfile if deamonized", 2016-02-22) wanted to move stderr of a daemonized QEMU to the file specified with -D. However, if -D was not passed, the patch had the side effect of not redirecting stderr to /dev/null. This happened because qemu_logfile was set to stderr rather than the expected value of NULL. The fix is simply in the "if" condition of do_qemu_set_log; the "if" for closing the file is also changed to match. Reported-by: Jan Tomko <jtomko@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> --- util/log.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)