mono/eglib/gfile.c

   1 /*
   2  * File utility functions.
   3  *
   4  * Author:
   5  *   Gonzalo Paniagua Javier (gonzalo@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
  31 #include <glib.h>
  32 #include <stdio.h>
  33 #include <string.h>
  34 #ifdef HAVE_UNISTD_H
  35 #include <unistd.h>
  36 #endif
  37 #include <errno.h>
  38
  39 static gpointer error_quark = (gpointer)"FileError";
  40
  41 gpointer
  42 g_file_error_quark (void)
  43 {
  44         return error_quark;
  45 }
  46
  47 GFileError
  48 g_file_error_from_errno (gint err_no)
  49 {
  50         switch (err_no) {
  51         case EEXIST:
  52                 return G_FILE_ERROR_EXIST;
  53         case EISDIR:
  54                 return G_FILE_ERROR_ISDIR;
  55         case EACCES:
  56                 return G_FILE_ERROR_ACCES;
  57         case ENAMETOOLONG:
  58                 return G_FILE_ERROR_NAMETOOLONG;
  59         case ENOENT:
  60                 return G_FILE_ERROR_NOENT;
  61         case ENOTDIR:
  62                 return G_FILE_ERROR_NOTDIR;
  63         case ENXIO:
  64                 return G_FILE_ERROR_NXIO;
  65         case ENODEV:
  66                 return G_FILE_ERROR_NODEV;
  67         case EROFS:
  68                 return G_FILE_ERROR_ROFS;
  69 #ifdef ETXTBSY
  70         case ETXTBSY:
  71                 return G_FILE_ERROR_TXTBSY;
  72 #endif
  73         case EFAULT:
  74                 return G_FILE_ERROR_FAULT;
  75 #ifdef ELOOP
  76         case ELOOP:
  77                 return G_FILE_ERROR_LOOP;
  78 #endif
  79         case ENOSPC:
  80                 return G_FILE_ERROR_NOSPC;
  81         case ENOMEM:
  82                 return G_FILE_ERROR_NOMEM;
  83         case EMFILE:
  84                 return G_FILE_ERROR_MFILE;
  85         case ENFILE:
  86                 return G_FILE_ERROR_NFILE;
  87         case EBADF:
  88                 return G_FILE_ERROR_BADF;
  89         case EINVAL:
  90                 return G_FILE_ERROR_INVAL;
  91         case EPIPE:
  92                 return G_FILE_ERROR_PIPE;
  93         case EAGAIN:
  94                 return G_FILE_ERROR_AGAIN;
  95         case EINTR:
  96                 return G_FILE_ERROR_INTR;
  97         case EIO:
  98                 return G_FILE_ERROR_IO;
  99         case EPERM:
 100                 return G_FILE_ERROR_PERM;
 101         case ENOSYS:
 102                 return G_FILE_ERROR_NOSYS;
 103         default:
 104                 return G_FILE_ERROR_FAILED;
 105         }
 106 }
 107
 108 #ifdef G_OS_WIN32
 109 #define TMP_FILE_FORMAT "%.*s%s.tmp"
 110 #else
 111 #define TMP_FILE_FORMAT "%.*s.%s~"
 112 #endif
 113
 114 gboolean
 115 g_file_set_contents (const gchar *filename, const gchar *contents, gssize length, GError **err)
 116 {
 117         const char *name;
 118         char *path;
 119         FILE *fp;
 120
 121         if (!(name = strrchr (filename, G_DIR_SEPARATOR)))
 122                 name = filename;
 123         else
 124                 name++;
 125
 126         path = g_strdup_printf (TMP_FILE_FORMAT, (int)(name - filename), filename, name);
 127         if (!(fp = fopen (path, "wb"))) {
 128                 g_set_error (err, G_FILE_ERROR, g_file_error_from_errno (errno), "%s", g_strerror (errno));
 129                 g_free (path);
 130                 return FALSE;
 131         }
 132
 133         if (length < 0)
 134                 length = strlen (contents);
 135
 136         if (fwrite (contents, 1, length, fp) < length) {
 137                 g_set_error (err, G_FILE_ERROR, g_file_error_from_errno (ferror (fp)), "%s", g_strerror (ferror (fp)));
 138                 g_unlink (path);
 139                 g_free (path);
 140                 fclose (fp);
 141
 142                 return FALSE;
 143         }
 144
 145         fclose (fp);
 146
 147         if (g_rename (path, filename) != 0) {
 148                 g_set_error (err, G_FILE_ERROR, g_file_error_from_errno (errno), "%s", g_strerror (errno));
 149                 g_unlink (path);
 150                 g_free (path);
 151                 return FALSE;
 152         }
 153
 154         g_free (path);
 155
 156         return TRUE;
 157 }