qemu-log: Open file for logging when specified

qemu-log defaults to stderr when there is no '-D' option mentioned on command
line. When '-D' option is specified, we also need to specify '-d' option for it
to use the specified logfile. When using monitor to enable logging this is
troublesome since there will be no '-d' option because of which monitor dumps
the logs to stderr.

Fix this by opening the log file when '-D' is specified on the command line.
Also fix an ancient comment which does not hold true since changing location and
log level has now been streamlined.

Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>
CC: Paolo Bonzini <pbonzini@redhat.com>
CC: Luiz Capitulino <lcapitulino@redhat.com>
CC: Markus Armbruster <armbru@redhat.com>
CC: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <1433946024-18439-1-git-send-email-bobby.prani@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Pranith Kumar 2015-06-10 10:20:24 -04:00 committed by Paolo Bonzini
parent 93f6d1c160
commit 67633bb4f7

13
vl.c
View File

@ -3916,17 +3916,14 @@ int main(int argc, char **argv, char **envp)
exit(0);
}
/* Open the logfile at this point, if necessary. We can't open the logfile
* when encountering either of the logging options (-d or -D) because the
* other one may be encountered later on the command line, changing the
* location or level of logging.
/* Open the logfile at this point and set the log mask if necessary.
*/
if (log_file) {
qemu_set_log_filename(log_file);
}
if (log_mask) {
int mask;
if (log_file) {
qemu_set_log_filename(log_file);
}
mask = qemu_str_to_log_mask(log_mask);
if (!mask) {
qemu_print_log_usage(stdout);