X-Git-Url: https://git.saurik.com/redis.git/blobdiff_plain/39bd025c295974986331ca4cd89ce18cfa50204a..06e178708e46181c30a8ff99107d506ab76185f3:/src/redis.c

diff --git a/src/redis.c b/src/redis.c
index 88fb2fd8..866076b1 100644
--- a/src/redis.c
+++ b/src/redis.c
@@ -293,6 +293,34 @@ void redisLog(int level, const char *fmt, ...) {
     redisLogRaw(level,msg);
 }
 
+/* Log a fixed message without printf-alike capabilities, in a way that is
+ * safe to call from a signal handler.
+ *
+ * We actually use this only for signals that are not fatal from the point
+ * of view of Redis. Signals that are going to kill the server anyway and
+ * where we need printf-alike features are served by redisLog(). */
+void redisLogFromHandler(int level, const char *msg) {
+    int fd;
+    char buf[64];
+
+    if ((level&0xff) < server.verbosity ||
+        (server.logfile == NULL && server.daemonize)) return;
+    fd = server.logfile ?
+        open(server.logfile, O_APPEND|O_CREAT|O_WRONLY, 0644) :
+        STDOUT_FILENO;
+    if (fd == -1) return;
+    ll2string(buf,sizeof(buf),getpid());
+    write(fd,"[",1);
+    write(fd,buf,strlen(buf));
+    write(fd," | signal handler] (",20);
+    ll2string(buf,sizeof(buf),time(NULL));
+    write(fd,buf,strlen(buf));
+    write(fd,") ",2);
+    write(fd,msg,strlen(msg));
+    write(fd,"\n",1);
+    if (server.logfile) close(fd);
+}
+
 /* Redis generally does not try to recover from out of memory conditions
  * when allocating objects or strings, it is not clear if it will be possible
  * to report this condition to the client since the networking layer itself
@@ -612,7 +640,7 @@ void activeExpireCycle(void) {
 }
 
 void updateLRUClock(void) {
-    server.lruclock = (time(NULL)/REDIS_LRU_CLOCK_RESOLUTION) &
+    server.lruclock = (server.unixtime/REDIS_LRU_CLOCK_RESOLUTION) &
                                                 REDIS_LRU_CLOCK_MAX;
 }
 
@@ -825,15 +853,13 @@ int serverCron(struct aeEventLoop *eventLoop, long long id, void *clientData) {
             updateDictResizePolicy();
         }
     } else {
-         time_t now = time(NULL);
-
         /* If there is not a background saving/rewrite in progress check if
          * we have to save/rewrite now */
          for (j = 0; j < server.saveparamslen; j++) {
             struct saveparam *sp = server.saveparams+j;
 
             if (server.dirty >= sp->changes &&
-                now-server.lastsave > sp->seconds) {
+                server.unixtime-server.lastsave > sp->seconds) {
                 redisLog(REDIS_NOTICE,"%d changes in %d seconds. Saving...",
                     sp->changes, sp->seconds);
                 rdbSaveBackground(server.rdb_filename);
@@ -951,16 +977,11 @@ void createSharedObjects(void) {
     shared.space = createObject(REDIS_STRING,sdsnew(" "));
     shared.colon = createObject(REDIS_STRING,sdsnew(":"));
     shared.plus = createObject(REDIS_STRING,sdsnew("+"));
-    shared.select0 = createStringObject("select 0\r\n",10);
-    shared.select1 = createStringObject("select 1\r\n",10);
-    shared.select2 = createStringObject("select 2\r\n",10);
-    shared.select3 = createStringObject("select 3\r\n",10);
-    shared.select4 = createStringObject("select 4\r\n",10);
-    shared.select5 = createStringObject("select 5\r\n",10);
-    shared.select6 = createStringObject("select 6\r\n",10);
-    shared.select7 = createStringObject("select 7\r\n",10);
-    shared.select8 = createStringObject("select 8\r\n",10);
-    shared.select9 = createStringObject("select 9\r\n",10);
+
+    for (j = 0; j < REDIS_SHARED_SELECT_CMDS; j++) {
+        shared.select[j] = createObject(REDIS_STRING,
+            sdscatprintf(sdsempty(),"select %d\r\n", j));
+    }
     shared.messagebulk = createStringObject("$7\r\nmessage\r\n",13);
     shared.pmessagebulk = createStringObject("$8\r\npmessage\r\n",14);
     shared.subscribebulk = createStringObject("$9\r\nsubscribe\r\n",15);
@@ -1688,7 +1709,7 @@ void bytesToHuman(char *s, unsigned long long n) {
  * on memory corruption problems. */
 sds genRedisInfoString(char *section) {
     sds info = sdsempty();
-    time_t uptime = time(NULL)-server.stat_starttime;
+    time_t uptime = server.unixtime-server.stat_starttime;
     int j, numcommands;
     struct rusage self_ru, c_ru;
     unsigned long lol, bib;
@@ -1827,7 +1848,7 @@ sds genRedisInfoString(char *section) {
             perc = ((double)server.loading_loaded_bytes /
                    server.loading_total_bytes) * 100;
 
-            elapsed = time(NULL)-server.loading_start_time;
+            elapsed = server.unixtime-server.loading_start_time;
             if (elapsed == 0) {
                 eta = 1; /* A fake 1 second figure if we don't have
                             enough info */
@@ -1898,7 +1919,7 @@ sds genRedisInfoString(char *section) {
                 (server.repl_state == REDIS_REPL_CONNECTED) ?
                     "up" : "down",
                 server.master ?
-                ((int)(time(NULL)-server.master->lastinteraction)) : -1,
+                ((int)(server.unixtime-server.master->lastinteraction)) : -1,
                 server.repl_state == REDIS_REPL_TRANSFER
             );
 
@@ -1907,14 +1928,14 @@ sds genRedisInfoString(char *section) {
                     "master_sync_left_bytes:%ld\r\n"
                     "master_sync_last_io_seconds_ago:%d\r\n"
                     ,(long)server.repl_transfer_left,
-                    (int)(time(NULL)-server.repl_transfer_lastio)
+                    (int)(server.unixtime-server.repl_transfer_lastio)
                 );
             }
 
             if (server.repl_state != REDIS_REPL_CONNECTED) {
                 info = sdscatprintf(info,
                     "master_link_down_since_seconds:%ld\r\n",
-                    (long)time(NULL)-server.repl_down_since);
+                    (long)server.unixtime-server.repl_down_since);
             }
         }
         info = sdscatprintf(info,
@@ -2284,7 +2305,7 @@ void redisAsciiArt(void) {
 static void sigtermHandler(int sig) {
     REDIS_NOTUSED(sig);
 
-    redisLog(REDIS_WARNING,"Received SIGTERM, scheduling shutdown...");
+    redisLogFromHandler(REDIS_WARNING,"Received SIGTERM, scheduling shutdown...");
     server.shutdown_asap = 1;
 }