main: switch to primary console vt on crash

[elogind.git] / log.c

diff --git a/log.c b/log.c
index 879cb537336e8461fec1c02ea79bceb79b41eeab..b82018f28b509c15091642665aad038879ea1f05 100644 (file)
--- a/log.c
+++ b/log.c
@@ -58,8 +58,12 @@ int log_open_kmsg(void) {
         if (kmsg_fd >= 0)
                 return 0;
 
-        if ((kmsg_fd = open("/dev/kmsg", O_WRONLY|O_NOCTTY|O_CLOEXEC)) < 0)
+        if ((kmsg_fd = open("/dev/kmsg", O_WRONLY|O_NOCTTY|O_CLOEXEC)) < 0) {
+                log_info("Failed to open syslog for logging: %s", strerror(errno));
                 return -errno;
+        }
+
+        log_info("Succesfully opened /dev/kmsg for logging.");
 
         return 0;
 }
@@ -107,9 +111,13 @@ int log_open_syslog(void) {
         if (connect(syslog_fd, &sa.sa, sizeof(sa)) < 0) {
                 r = -errno;
                 log_close_syslog();
-                return -errno;
+
+                log_info("Failed to open syslog for logging: %s", strerror(-r));
+                return r;
         }
 
+        log_info("Succesfully opened syslog for logging.");
+
         return 0;
 }
 
@@ -272,3 +280,51 @@ void log_meta(
 
         errno = saved_errno;
 }
+
+int log_set_target_from_string(const char *e) {
+        LogTarget t;
+
+        if ((t = log_target_from_string(e)) < 0)
+                return -EINVAL;
+
+        log_set_target(t);
+        return 0;
+}
+
+int log_set_max_level_from_string(const char *e) {
+        int t;
+
+        if ((t = log_level_from_string(e)) < 0)
+                return -EINVAL;
+
+        log_set_max_level(t);
+        return 0;
+}
+
+void log_parse_environment(void) {
+        const char *e;
+
+        if ((e = getenv("SYSTEMD_LOG_TARGET")))
+                if (log_set_target_from_string(e) < 0)
+                        log_warning("Failed to parse log target %s. Ignoring.", e);
+
+        if ((e = getenv("SYSTEMD_LOG_LEVEL")))
+                if (log_set_max_level_from_string(e) < 0)
+                        log_warning("Failed to parse log level %s. Ignoring.", e);
+}
+
+LogTarget log_get_target(void) {
+        return log_target;
+}
+
+int log_get_max_level(void) {
+        return log_max_level;
+}
+
+static const char *const log_target_table[] = {
+        [LOG_TARGET_CONSOLE] = "console",
+        [LOG_TARGET_SYSLOG] = "syslog",
+        [LOG_TARGET_KMSG] = "kmsg",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(log_target, LogTarget);