diff options
Diffstat (limited to 'winsup/cygwin/syslog.cc')
| -rw-r--r-- | winsup/cygwin/syslog.cc | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/winsup/cygwin/syslog.cc b/winsup/cygwin/syslog.cc index b856bb7aa..38c8ecc31 100644 --- a/winsup/cygwin/syslog.cc +++ b/winsup/cygwin/syslog.cc @@ -461,6 +461,38 @@ syslog (int priority, const char *message, ...) va_end (ap); } +static NO_COPY muto klog_guard; +fhandler_mailslot *dev_kmsg; + +extern "C" void +vklog (int priority, const char *message, va_list ap) +{ + /* TODO: kernel messages are under our control entirely and they should + be quick. No playing with /dev/null, but a fixed upper size for now. */ + char buf[2060]; /* 2048 + a prority */ + __small_sprintf (buf, "<%d>", priority); + __small_vsprintf (buf + strlen (buf), message, ap); + klog_guard.init ("klog_guard")->acquire (); + if (!dev_kmsg) + dev_kmsg = (fhandler_mailslot *) build_fh_name ("/dev/kmsg"); + if (dev_kmsg && !dev_kmsg->get_handle ()) + dev_kmsg->open (O_WRONLY, 0); + if (dev_kmsg && dev_kmsg->get_handle ()) + dev_kmsg->write (buf, strlen (buf) + 1); + else + vsyslog (priority, message, ap); + klog_guard.release (); +} + +extern "C" void +klog (int priority, const char *message, ...) +{ + va_list ap; + va_start (ap, message); + vklog (priority, message, ap); + va_end (ap); +} + extern "C" void closelog (void) { |