eglib/src/gmisc-unix.c

   1 /*
   2  * gmisc.c: Misc functions with no place to go (right now)
   3  *
   4  * Author:
   5  *   Aaron Bockover (abockover@novell.com)
   6  *
   7  * (C) 2006 Novell, Inc.
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining
  10  * a copy of this software and associated documentation files (the
  11  * "Software"), to deal in the Software without restriction, including
  12  * without limitation the rights to use, copy, modify, merge, publish,
  13  * distribute, sublicense, and/or sell copies of the Software, and to
  14  * permit persons to whom the Software is furnished to do so, subject to
  15  * the following conditions:
  16  *
  17  * The above copyright notice and this permission notice shall be
  18  * included in all copies or substantial portions of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27  */
  28
  29 #include <config.h>
  30 #include <stdlib.h>
  31 #include <glib.h>
  32 #include <pthread.h>
  33
  34 #ifdef HAVE_PWD_H
  35 #include <pwd.h>
  36 #endif
  37
  38 #ifdef HAVE_UNISTD_H
  39 #include <unistd.h>
  40 #endif
  41
  42
  43 const gchar *
  44 g_getenv(const gchar *variable)
  45 {
  46         return getenv(variable);
  47 }
  48
  49 gboolean
  50 g_setenv(const gchar *variable, const gchar *value, gboolean overwrite)
  51 {
  52         return setenv(variable, value, overwrite) == 0;
  53 }
  54
  55 void
  56 g_unsetenv(const gchar *variable)
  57 {
  58         unsetenv(variable);
  59 }
  60
  61 gchar*
  62 g_win32_getlocale(void)
  63 {
  64         return NULL;
  65 }
  66
  67 gboolean
  68 g_path_is_absolute (const char *filename)
  69 {
  70         g_return_val_if_fail (filename != NULL, FALSE);
  71
  72         return (*filename == '/');
  73 }
  74
  75 static pthread_mutex_t pw_lock = PTHREAD_MUTEX_INITIALIZER;
  76 static const gchar *home_dir;
  77 static const gchar *user_name;
  78
  79 static void
  80 get_pw_data (void)
  81 {
  82 #ifdef HAVE_GETPWUID_R
  83         struct passwd pw;
  84         struct passwd *result;
  85         char buf [4096];
  86 #endif
  87
  88         if (user_name != NULL)
  89                 return;
  90
  91         pthread_mutex_lock (&pw_lock);
  92         if (user_name != NULL) {
  93                 pthread_mutex_unlock (&pw_lock);
  94                 return;
  95         }
  96 #ifdef HAVE_GETPWUID_R
  97         if (getpwuid_r (getuid (), &pw, buf, 4096, &result) == 0) {
  98                 home_dir = g_strdup (pw.pw_dir);
  99                 user_name = g_strdup (pw.pw_name);
 100         }
 101 #endif
 102         if (home_dir == NULL)
 103                 home_dir = g_getenv ("HOME");
 104
 105         if (user_name == NULL) {
 106                 user_name = g_getenv ("USER");
 107                 if (user_name == NULL)
 108                         user_name = "somebody";
 109         }
 110         pthread_mutex_unlock (&pw_lock);
 111 }
 112
 113 /* Give preference to /etc/passwd than HOME */
 114 const gchar *
 115 g_get_home_dir (void)
 116 {
 117         get_pw_data ();
 118         return home_dir;
 119 }
 120
 121 const char *
 122 g_get_user_name (void)
 123 {
 124         get_pw_data ();
 125         return user_name;
 126 }
 127
 128 static const char *tmp_dir;
 129
 130 static pthread_mutex_t tmp_lock = PTHREAD_MUTEX_INITIALIZER;
 131
 132 const gchar *
 133 g_get_tmp_dir (void)
 134 {
 135         if (tmp_dir == NULL){
 136                 pthread_mutex_lock (&tmp_lock);
 137                 if (tmp_dir == NULL){
 138                         tmp_dir = g_getenv ("TMPDIR");
 139                         if (tmp_dir == NULL){
 140                                 tmp_dir = g_getenv ("TMP");
 141                                 if (tmp_dir == NULL){
 142                                         tmp_dir = g_getenv ("TEMP");
 143                                         if (tmp_dir == NULL)
 144                                                 tmp_dir = "/tmp";
 145                                 }
 146                         }
 147                 }
 148                 pthread_mutex_unlock (&tmp_lock);
 149         }
 150         return tmp_dir;
 151 }
 152