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       1                 :            : /*
       2                 :            :  * Copyright (c) 2015, 2016 Nicira, Inc.
       3                 :            :  *
       4                 :            :  * Licensed under the Apache License, Version 2.0 (the "License");
       5                 :            :  * you may not use this file except in compliance with the License.
       6                 :            :  * You may obtain a copy of the License at:
       7                 :            :  *
       8                 :            :  *     http://www.apache.org/licenses/LICENSE-2.0
       9                 :            :  *
      10                 :            :  * Unless required by applicable law or agreed to in writing, software
      11                 :            :  * distributed under the License is distributed on an "AS IS" BASIS,
      12                 :            :  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      13                 :            :  * See the License for the specific language governing permissions and
      14                 :            :  * limitations under the License.
      15                 :            :  */
      16                 :            : #include "syslog-libc.h"
      17                 :            : 
      18                 :            : #include <config.h>
      19                 :            : 
      20                 :            : #include <string.h>
      21                 :            : #include <syslog.h>
      22                 :            : #include <unistd.h>
      23                 :            : 
      24                 :            : #include "compiler.h"
      25                 :            : #include "openvswitch/dynamic-string.h"
      26                 :            : #include "socket-util.h"
      27                 :            : #include "syslog-provider.h"
      28                 :            : #include "util.h"
      29                 :            : 
      30                 :            : 
      31                 :            : static void syslog_libc_open(struct syslogger *this, int facility);
      32                 :            : static void syslog_libc_log(struct syslogger *this, int pri, const char *msg);
      33                 :            : 
      34                 :            : static struct syslog_class syslog_libc_class = {
      35                 :            :     syslog_libc_open,
      36                 :            :     syslog_libc_log,
      37                 :            : };
      38                 :            : 
      39                 :            : struct syslog_libc {
      40                 :            :     struct syslogger parent;
      41                 :            : };
      42                 :            : 
      43                 :            : 
      44                 :            : /* This function  creates object that delegate all logging to libc's
      45                 :            :  * syslog implementation. */
      46                 :            : struct syslogger *
      47                 :       6684 : syslog_libc_create(void)
      48                 :            : {
      49                 :       6684 :     struct syslog_libc *this = xmalloc(sizeof *this);
      50                 :            : 
      51                 :       6684 :     this->parent.class = &syslog_libc_class;
      52                 :       6684 :     this->parent.prefix = "<%B> %D{%h %e %T} %E %A:";
      53                 :            : 
      54                 :       6684 :     return &this->parent;
      55                 :            : }
      56                 :            : 
      57                 :            : static void
      58                 :       6684 : syslog_libc_open(struct syslogger *this OVS_UNUSED, int facility)
      59                 :            : {
      60                 :            :     static char *ident;
      61                 :            : 
      62                 :            :     /* openlog() is allowed to keep the pointer passed in, without making a
      63                 :            :      * copy.  The daemonize code sometimes frees and replaces
      64                 :            :      * 'program_name', so make a private copy just for openlog().  (We keep
      65                 :            :      * a pointer to the private copy to suppress memory leak warnings in
      66                 :            :      * case openlog() does make its own copy.) */
      67                 :       6684 :     ident = nullable_xstrdup(program_name);
      68                 :            : 
      69                 :       6684 :     openlog(ident, LOG_NDELAY, facility);
      70                 :       6684 : }
      71                 :            : 
      72                 :            : static void
      73                 :     221115 : syslog_libc_log(struct syslogger *this OVS_UNUSED, int pri, const char *msg)
      74                 :            : {
      75                 :     221115 :     syslog(pri, "%s", msg);
      76                 :     221115 : }