ltt-sessiond/utils.c

   1 /*
   2  * Copyright (C)  2011 - David Goulet <david.goulet@polymtl.ca>
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version 2
   7  * of the License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  17  */
  18
  19 #define _GNU_SOURCE
  20 #include <errno.h>
  21 #include <limits.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <sys/types.h>
  26 #include <sys/stat.h>
  27 #include <unistd.h>
  28
  29 #include "utils.h"
  30
  31 int mkdir_recursive(const char *path, mode_t mode)
  32 {
  33     int ret;
  34     char *p, tmp[PATH_MAX];
  35     size_t len;
  36     mode_t old_umask;
  37
  38     ret = snprintf(tmp, sizeof(tmp), "%s", path);
  39         if (ret < 0) {
  40                 perror("snprintf mkdir");
  41                 goto error;
  42         }
  43
  44     len = ret;
  45     if (tmp[len - 1] == '/') {
  46         tmp[len - 1] = 0;
  47     }
  48
  49     old_umask = umask(0);
  50     for (p = tmp + 1; *p; p++) {
  51         if (*p == '/') {
  52             *p = 0;
  53             ret = mkdir(tmp, mode);
  54             if (ret < 0) {
  55                 if (!(errno == EEXIST)) {
  56                                         perror("mkdir recursive");
  57                                         ret = errno;
  58                     goto umask_error;
  59                 }
  60             }
  61             *p = '/';
  62         }
  63     }
  64
  65     ret = mkdir(tmp, mode);
  66         if (ret < 0) {
  67                 ret = errno;
  68         }
  69
  70 umask_error:
  71         umask(old_umask);
  72 error:
  73     return ret;
  74 }