src/rename_journal.c

   1 /*======================================================================*
   2  * Copyright (C) 2008 Light Weight Event System                         *
   3  * All rights reserved.                                                 *
   4  *                                                                      *
   5  * This program is free software; you can redistribute it and/or modify *
   6  * it under the terms of the GNU General Public License as published by *
   7  * the Free Software Foundation; either version 2 of the License, or    *
   8  * (at your option) any later version.                                  *
   9  *                                                                      *
  10  * This program is distributed in the hope that it will be useful,      *
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of       *
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the        *
  13  * GNU General Public License for more details.                         *
  14  *                                                                      *
  15  * You should have received a copy of the GNU General Public License    *
  16  * along with this program; if not, write to the Free Software          *
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor,                   *
  18  * Boston, MA 02110-1301 USA.                                           *
  19  *======================================================================*/
  20
  21 #include "config.h"
  22
  23 #include "rename_journal.h"
  24
  25 #include "log.h"
  26 #include "sig.h"
  27 #include "perror.h"
  28 #include "opt.h"
  29
  30 #include <limits.h>
  31 #include <stdio.h>
  32 #include <string.h>
  33 #include <strings.h>
  34 #include <time.h>
  35 #include <unistd.h>
  36
  37 int rename_journal(const char* path, time_t* last_rotate)
  38 {
  39   char empty[1] = "";
  40   char* ext;
  41   char base[PATH_MAX];
  42   char newpath[PATH_MAX];
  43   char timebfr[100];        /* Needs to be big enough for strftime below */
  44   time_t now = time(NULL);  /* get current time */
  45   struct tm tm_now;
  46
  47 #ifndef WIN32 //TODO: someday figure out localtime_r() on WIN32, but not needed now
  48   if ( strftime(timebfr, sizeof(timebfr), "%Y%m%d%H%M%S",
  49                 localtime_r(&now, &tm_now)) == 0 )
  50     {
  51       LOG_ER("strftime failed in rename_journal(\"%s\", ...)\n", path);
  52       return -1;
  53     }
  54 #endif
  55
  56   if ( 0 != (ext = strrchr(path, '.')) )
  57     {
  58       strncpy(base, path, ext - path);
  59       base[ext - path] = '\0';
  60     }
  61   else
  62     {
  63       strcpy(base, path);
  64       ext = empty;
  65     }
  66
  67   snprintf(newpath, sizeof(newpath), "%s.%s.%ld.%ld%s",
  68            base, timebfr, *last_rotate, now, ext);
  69   *last_rotate = now;
  70
  71   if ( gbl_rotate )
  72     {
  73       LOG_INF("Naming new journal file \"%s\".\n", newpath);
  74     }
  75
  76   if ( rename(path, newpath) < 0 )
  77     {
  78       char buf[100] ;
  79       LOG_ER("rename: %s: - '%s' -> '%s'\n",
  80              strerror_r(errno,buf,sizeof(buf)), path, newpath);
  81       return -1;
  82     }
  83
  84   if ( chown(newpath, arg_journal_uid, -1) < 0 )
  85     {
  86       char buf[100] ;
  87       LOG_ER("rename: %s: - '%s' could not be granted to uid %d\n",
  88              strerror_r(errno,buf,sizeof(buf)), newpath, arg_journal_uid);
  89       return -1;
  90     }
  91
  92   return 0;
  93 }