options.c

   1 /* usmb - mount SMB shares via FUSE and Samba
   2  * Copyright (C) 2006-2013 Geoff Johnstone
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 3 as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15  */
  16
  17 #include "config.h"
  18 #include <assert.h>
  19 #include <glib.h>
  20 #include <stdbool.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include "options.h"
  24 #include "utils.h"
  25 #include "version.h"
  26
  27
  28 static gboolean version = FALSE;
  29 static gchar *conffile = NULL;
  30 static gboolean debug = FALSE;
  31 static gboolean nofork = FALSE;
  32 static gboolean umount = FALSE;
  33 static gchar **remaining = NULL;
  34
  35
  36 static GOptionEntry entries[] = {
  37   { .long_name = "version",
  38     .short_name = 'v',
  39     .flags = 0,
  40     .arg = G_OPTION_ARG_NONE,
  41     .arg_data = &version,
  42     .description = "Show usmb, FUSE and Samba versions" },
  43
  44   { .long_name = "version",
  45     .short_name = 'V',
  46     .flags = G_OPTION_FLAG_HIDDEN,
  47     .arg = G_OPTION_ARG_NONE,
  48     .arg_data = &version,
  49     .description = NULL },
  50
  51   { .long_name = "config",
  52     .short_name = 'c',
  53     .flags = 0,
  54     .arg = G_OPTION_ARG_FILENAME,
  55     .arg_data = &conffile,
  56     .description = "usmb configuration file" },
  57
  58   { .long_name = "debug",
  59     .short_name = 'd',
  60     .arg = G_OPTION_ARG_NONE,
  61     .arg_data = &debug,
  62     .description = "Debug mode" },
  63
  64   { .long_name = "nofork",
  65     .short_name = 'f',
  66     .arg = G_OPTION_ARG_NONE,
  67     .arg_data = &nofork,
  68     .description = "Foreground operation" },
  69
  70   { .long_name = "unmount",
  71     .short_name = 'u',
  72     .arg = G_OPTION_ARG_NONE,
  73     .arg_data = &umount,
  74     .description = "Unmount the given filesystem" },
  75
  76   { .long_name = G_OPTION_REMAINING,
  77     .short_name = 0,
  78     .arg = G_OPTION_ARG_STRING_ARRAY,
  79     .arg_data = &remaining,
  80     .description = NULL },
  81
  82   { .long_name = NULL }
  83 };
  84
  85
  86 bool parse_args (int *argc, char ***argv,
  87                  const char **mountid, const char **out_conffile,
  88                  bool *out_umount)
  89 {
  90   GError *error = NULL;
  91
  92   GOptionContext *context =
  93     g_option_context_new ("- mount SMB shares via FUSE and Samba");
  94   g_option_context_add_main_entries (context, entries, NULL);
  95   bool ret = g_option_context_parse (context, argc, argv, &error);
  96   g_option_context_free (context);
  97
  98   if (false == ret)
  99   {
 100     fprintf (stderr, "Try `%s --help' for more information\n", (*argv)[0]);
 101     return false;
 102   }
 103
 104   if (version)
 105   {
 106     show_version (stdout);
 107     exit (EXIT_SUCCESS);
 108   }
 109
 110   if ((NULL == remaining) || (NULL == remaining[0]))
 111   {
 112     fputs ("No share ID given.\n", stderr);
 113     return false;
 114   }
 115
 116   if (NULL != remaining[1])
 117   {
 118     fputs ("Too many arguments.\n", stderr);
 119     return false;
 120   }
 121
 122   *out_umount = umount;
 123   *mountid = remaining[0];
 124   g_free (remaining);
 125   DEBUG (fprintf (stderr, "Mount ID: %s\n", *mountid));
 126
 127   if (NULL != conffile)
 128     *out_conffile = conffile;
 129
 130   return ret;
 131 }
 132
 133
 134 /* FUSE args are:
 135  *
 136  * argv[0]
 137  * -s
 138  * -d          -- if debug mode requested
 139  * -f          -- if foreground mode requested
 140  * -o ...      -- if any mount options in the config file
 141  * mount point
 142  */
 143 #define MAXARGS 12
 144 void build_fuse_args (const char *options, const char *mountpoint,
 145                       int *out_argc, char ***out_argv)
 146 {
 147   static char USMB[] = "usmb";
 148   static char MINUS_S[] = "-s";
 149   static char MINUS_D[] = "-d";
 150   static char MINUS_F[] = "-f";
 151   static char MINUS_O[] = "-o";
 152   static char MAX_READ[] = "max_read=32768";
 153
 154   assert (NULL != mountpoint);
 155   static char *argv[MAXARGS];
 156
 157   int argc = 0;
 158
 159   argv[argc++] = USMB;
 160   argv[argc++] = MINUS_S;
 161
 162   if (debug)
 163     argv[argc++] = MINUS_D;
 164
 165   // force -f in debug mode
 166 #ifndef DEBUGON
 167   if (nofork)
 168 #endif
 169     argv[argc++] = MINUS_F;
 170
 171   argv[argc++] = MINUS_O;
 172   argv[argc++] = MAX_READ;
 173
 174   if ((NULL != options) && ('\0' != options[0]))
 175   {
 176     argv[argc++] = MINUS_O;
 177     argv[argc++] = (char *)options;
 178   }
 179
 180   argv[argc++] = (char *)mountpoint;
 181   argv[argc] = NULL;          // for good measure...
 182
 183   assert (argc < MAXARGS);
 184   *out_argc = argc;
 185   *out_argv = argv;
 186
 187   #ifdef DEBUGON
 188     for (int i = 0; i < argc; ++i)
 189       fprintf (stderr, "%d: %s\n", i, argv[i]);
 190   #endif
 191 }
 192