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Merge branch 'lw/daemon-log-destination'

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The log from "git daemon" can be redirected with a new option; one
relevant use case is to send the log to standard error (instead of
syslog) when running it from inetd.

* lw/daemon-log-destination:
  daemon: add --log-destination=(stderr|syslog|none)
This commit is contained in:
Junio C Hamano
2018-02-21 12:45:04 -08:00
parent e469e9c5c6 0c591cacba
commit c2bd43d66d
2 changed files with 64 additions and 10 deletions
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46
daemon.c
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@ -9,7 +9,12 @@
#define initgroups(x, y) (0) /* nothing */
#endif
static int log_syslog;
static enum log_destination {
LOG_DESTINATION_UNSET = -1,
LOG_DESTINATION_NONE = 0,
LOG_DESTINATION_STDERR = 1,
LOG_DESTINATION_SYSLOG = 2,
} log_destination = LOG_DESTINATION_UNSET;
static int verbose;
static int reuseaddr;
static int informative_errors;
@ -25,6 +30,7 @@ static const char daemon_usage[] =
" [--access-hook=<path>]\n"
" [--inetd | [--listen=<host_or_ipaddr>] [--port=<n>]\n"
" [--detach] [--user=<user> [--group=<group>]]\n"
" [--log-destination=(stderr|syslog|none)]\n"
" [<directory>...]";
/* List of acceptable pathname prefixes */
@ -74,11 +80,14 @@ static const char *get_ip_address(struct hostinfo *hi)
static void logreport(int priority, const char *err, va_list params)
{
if (log_syslog) {
switch (log_destination) {
case LOG_DESTINATION_SYSLOG: {
char buf[1024];
vsnprintf(buf, sizeof(buf), err, params);
syslog(priority, "%s", buf);
} else {
break;
}
case LOG_DESTINATION_STDERR:
/*
* Since stderr is set to buffered mode, the
* logging of different processes will not overlap
@ -88,6 +97,11 @@ static void logreport(int priority, const char *err, va_list params)
vfprintf(stderr, err, params);
fputc('\n', stderr);
fflush(stderr);
break;
case LOG_DESTINATION_NONE:
break;
case LOG_DESTINATION_UNSET:
BUG("log destination not initialized correctly");
}
}
@ -1286,7 +1300,6 @@ int cmd_main(int argc, const char **argv)
}
if (!strcmp(arg, "--inetd")) {
inetd_mode = 1;
log_syslog = 1;
continue;
}
if (!strcmp(arg, "--verbose")) {
@ -1294,9 +1307,22 @@ int cmd_main(int argc, const char **argv)
continue;
}
if (!strcmp(arg, "--syslog")) {
log_syslog = 1;
log_destination = LOG_DESTINATION_SYSLOG;
continue;
}
if (skip_prefix(arg, "--log-destination=", &v)) {
if (!strcmp(v, "syslog")) {
log_destination = LOG_DESTINATION_SYSLOG;
continue;
} else if (!strcmp(v, "stderr")) {
log_destination = LOG_DESTINATION_STDERR;
continue;
} else if (!strcmp(v, "none")) {
log_destination = LOG_DESTINATION_NONE;
continue;
} else
die("unknown log destination '%s'", v);
}
if (!strcmp(arg, "--export-all")) {
export_all_trees = 1;
continue;
@ -1353,7 +1379,6 @@ int cmd_main(int argc, const char **argv)
}
if (!strcmp(arg, "--detach")) {
detach = 1;
log_syslog = 1;
continue;
}
if (skip_prefix(arg, "--user=", &v)) {
@ -1399,7 +1424,14 @@ int cmd_main(int argc, const char **argv)
usage(daemon_usage);
}
if (log_syslog) {
if (log_destination == LOG_DESTINATION_UNSET) {
if (inetd_mode || detach)
log_destination = LOG_DESTINATION_SYSLOG;
else
log_destination = LOG_DESTINATION_STDERR;
}
if (log_destination == LOG_DESTINATION_SYSLOG) {
openlog("git-daemon", LOG_PID, LOG_DAEMON);
set_die_routine(daemon_die);
} else