2 #include <sys/socket.h>
14 static volatile int lock[1];
15 static char log_ident[32];
17 static int log_facility = LOG_USER;
18 static int log_mask = 0xff;
19 static int log_fd = -1;
21 int setlogmask(int maskpri)
25 if (maskpri) log_mask = maskpri;
41 pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
46 pthread_setcancelstate(cs, 0);
49 static void __openlog()
51 log_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0);
52 if (log_fd >= 0) connect(log_fd, (void *)&log_addr, sizeof log_addr);
55 void openlog(const char *ident, int opt, int facility)
58 pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
62 size_t n = strnlen(ident, sizeof log_ident - 1);
63 memcpy(log_ident, ident, n);
69 log_facility = facility;
71 if ((opt & LOG_NDELAY) && log_fd<0) __openlog();
74 pthread_setcancelstate(cs, 0);
77 static int is_lost_conn(int e)
79 return e==ECONNREFUSED || e==ECONNRESET || e==ENOTCONN || e==EPIPE;
82 static void _vsyslog(int priority, const char *message, va_list ap)
88 int errno_save = errno;
94 if (log_fd < 0) __openlog();
96 if (!(priority & LOG_FACMASK)) priority |= log_facility;
100 strftime(timebuf, sizeof timebuf, "%b %e %T", &tm);
102 pid = (log_opt & LOG_PID) ? getpid() : 0;
103 l = snprintf(buf, sizeof buf, "<%d>%s %n%s%s%.0d%s: ",
104 priority, timebuf, &hlen, log_ident, "["+!pid, pid, "]"+!pid);
106 l2 = vsnprintf(buf+l, sizeof buf - l, message, ap);
108 if (l2 >= sizeof buf - l) l = sizeof buf - 1;
110 if (buf[l-1] != '\n') buf[l++] = '\n';
111 if (send(log_fd, buf, l, 0) < 0 && (!is_lost_conn(errno)
112 || connect(log_fd, (void *)&log_addr, sizeof log_addr) < 0
113 || send(log_fd, buf, l, 0) < 0)
114 && (log_opt & LOG_CONS)) {
115 fd = open("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
117 dprintf(fd, "%.*s", l-hlen, buf+hlen);
121 if (log_opt & LOG_PERROR) dprintf(2, "%.*s", l-hlen, buf+hlen);
125 static void __vsyslog(int priority, const char *message, va_list ap)
128 if (!(log_mask & LOG_MASK(priority&7)) || (priority&~0x3ff)) return;
129 pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
131 _vsyslog(priority, message, ap);
133 pthread_setcancelstate(cs, 0);
136 void syslog(int priority, const char *message, ...)
139 va_start(ap, message);
140 __vsyslog(priority, message, ap);
144 weak_alias(__vsyslog, vsyslog);