src/udev/src/floppy/create_floppy_devices.c

   1 /*
   2  * Create all possible floppy device based on the CMOS type.
   3  * Based upon code from drivers/block/floppy.c
   4  *
   5  * Copyright(C) 2005, SUSE Linux Products GmbH
   6  *
   7  * Author: Hannes Reinecke <hare@suse.de>
   8  *
   9  * This program is free software: you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation, either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21  */
  22
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <sys/types.h>
  26 #include <sys/stat.h>
  27 #include <fcntl.h>
  28 #include <unistd.h>
  29 #include <string.h>
  30 #include <pwd.h>
  31 #include <grp.h>
  32
  33 #include "libudev.h"
  34 #include "libudev-private.h"
  35
  36 static char *table[] = {
  37         "", "d360", "h1200", "u360", "u720", "h360", "h720",
  38         "u1440", "u2880", "CompaQ", "h1440", "u1680", "h410",
  39         "u820", "h1476", "u1722", "h420", "u830", "h1494", "u1743",
  40         "h880", "u1040", "u1120", "h1600", "u1760", "u1920",
  41         "u3200", "u3520", "u3840", "u1840", "u800", "u1600",
  42         NULL
  43 };
  44
  45 static int t360[] = { 1, 0 };
  46 static int t1200[] = { 2, 5, 6, 10, 12, 14, 16, 18, 20, 23, 0 };
  47 static int t3in[] = { 8, 9, 26, 27, 28, 7, 11, 15, 19, 24, 25, 29, 31, 3, 4, 13, 17, 21, 22, 30, 0 };
  48 static int *table_sup[] = { NULL, t360, t1200, t3in+5+8, t3in+5, t3in, t3in };
  49
  50 static void log_fn(struct udev *udev, int priority,
  51                    const char *file, int line, const char *fn,
  52                    const char *format, va_list args)
  53 {
  54         vsyslog(priority, format, args);
  55 }
  56
  57 int main(int argc, char **argv)
  58 {
  59         struct udev *udev;
  60         char *dev;
  61         char *devname;
  62         char node[64];
  63         int type = 0, i, fdnum, c;
  64         int major = 2, minor;
  65         uid_t uid = 0;
  66         gid_t gid = 0;
  67         mode_t mode = 0660;
  68         int create_nodes = 0;
  69         int print_nodes = 0;
  70         int is_err = 0;
  71
  72         udev = udev_new();
  73         if (udev == NULL)
  74                 goto exit;
  75
  76         udev_log_init("create_floppy_devices");
  77         udev_set_log_fn(udev, log_fn);
  78         udev_selinux_init(udev);
  79
  80         while ((c = getopt(argc, argv, "cudm:U:G:M:t:")) != -1) {
  81                 switch (c) {
  82                 case 'c':
  83                         create_nodes = 1;
  84                         break;
  85                 case 'd':
  86                         print_nodes = 1;
  87                         break;
  88                 case 'U':
  89                         uid = util_lookup_user(udev, optarg);
  90                         break;
  91                 case 'G':
  92                         gid = util_lookup_group(udev, optarg);
  93                         break;
  94                 case 'M':
  95                         mode = strtol(optarg, NULL, 0);
  96                         mode = mode & 0666;
  97                         break;
  98                 case 'm':
  99                         major = strtol(optarg, NULL, 0);
 100                         break;
 101                 case 't':
 102                         type = strtol(optarg, NULL, 0);
 103                         break;
 104                 default:
 105                         is_err++;
 106                         break;
 107                 }
 108         }
 109
 110         if (is_err || optind >= argc) {
 111                 printf("Usage:  %s [OPTION] device\n"
 112                        "  -c   create\n"
 113                        "  -d   debug\n"
 114                        "  -m   Major number\n"
 115                        "  -t   floppy type number\n"
 116                        "  -U   device node user ownership\n"
 117                        "  -G   device node group owner\n"
 118                        "  -M   device node mode\n"
 119                        "\n", argv[0]);
 120                 return 1;
 121         }
 122
 123         dev = argv[optind];
 124         devname = strrchr(dev, '/');
 125         if (devname != NULL)
 126                 devname = &devname[1];
 127         else
 128                 devname = dev;
 129         if (strncmp(devname, "fd", 2) != 0) {
 130                 fprintf(stderr,"Device '%s' is not a floppy device\n", dev);
 131                 return 1;
 132         }
 133
 134         fdnum = strtol(&devname[2], NULL, 10);
 135         if (fdnum < 0 || fdnum > 7) {
 136                 fprintf(stderr,"Floppy device number %d out of range (0-7)\n", fdnum);
 137                 return 1;
 138         }
 139         if (fdnum > 3)
 140                 fdnum += 124;
 141
 142         if (major < 1) {
 143                 fprintf(stderr,"Invalid major number %d\n", major);
 144                 return 1;
 145         }
 146
 147         if (type < 0 || type >= (int) ARRAY_SIZE(table_sup)) {
 148                 fprintf(stderr,"Invalid CMOS type %d\n", type);
 149                 return 1;
 150         }
 151
 152         if (type == 0)
 153                 return 0;
 154
 155         i = 0;
 156         while (table_sup[type][i]) {
 157                 sprintf(node, "%s%s", dev, table[table_sup[type][i]]);
 158                 minor = (table_sup[type][i] << 2) + fdnum;
 159                 if (print_nodes)
 160                         printf("%s b %.4o %d %d\n", node, mode, major, minor);
 161                 if (create_nodes) {
 162                         unlink(node);
 163                         udev_selinux_setfscreatecon(udev, node, S_IFBLK | mode);
 164                         mknod(node, S_IFBLK | mode, makedev(major,minor));
 165                         udev_selinux_resetfscreatecon(udev);
 166                         chown(node, uid, gid);
 167                         chmod(node, S_IFBLK | mode);
 168                 }
 169                 i++;
 170         }
 171
 172         udev_selinux_exit(udev);
 173         udev_unref(udev);
 174         udev_log_close();
 175 exit:
 176         return 0;
 177 }