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eject.c revision 1.12 
      1 /*	$NetBSD: eject.c,v 1.12 1999/03/26 09:14:58 bouyer Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1999 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Chris Jones.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *	This product includes software developed by the NetBSD
     21  *	Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #include <sys/cdefs.h>
     40 #ifndef lint
     41 __COPYRIGHT("@(#) Copyright (c) 1999 The NetBSD Foundation, Inc.\n\
     42 	All rights reserved.\n");
     43 #endif /* not lint */
     44 
     45 #ifndef lint
     46 __RCSID("$NetBSD: eject.c,v 1.12 1999/03/26 09:14:58 bouyer Exp $");
     47 #endif /* not lint */
     48 
     49 #include <ctype.h>
     50 #include <err.h>
     51 #include <fcntl.h>
     52 #include <stdio.h>
     53 #include <stdlib.h>
     54 #include <string.h>
     55 #include <unistd.h>
     56 #include <sys/cdio.h>
     57 #include <sys/disklabel.h>
     58 #include <sys/ioctl.h>
     59 #include <sys/param.h>
     60 #include <sys/ucred.h>
     61 #include <sys/mount.h>
     62 #include <sys/mtio.h>
     63 
     64 struct nicknames_s {
     65     char *name;			/* The name given on the command line. */
     66     char *devname;		/* The base name of the device */
     67     int type;			/* The type of device, for determining
     68 				   what ioctl to use. */
     69 #define TAPE 0x10
     70 #define DISK 0x20
     71     /* OR one of the above with one of the below: */
     72 #define NOTLOADABLE 0x00
     73 #define LOADABLE 0x01
     74 #define TYPEMASK ((int)~0x01)
     75 } nicknames[] = {
     76     { "diskette", "fd", DISK | NOTLOADABLE },
     77     { "floppy", "fd", DISK | NOTLOADABLE },
     78     { "fd", "fd", DISK | NOTLOADABLE },
     79     { "sd", "sd", DISK | NOTLOADABLE },
     80     { "cdrom", "cd", DISK | LOADABLE },
     81     { "cd", "cd", DISK | LOADABLE },
     82     { "mcd", "mcd", DISK | LOADABLE }, /* XXX Is this true? */
     83     { "tape", "st", TAPE | NOTLOADABLE },
     84     { "st", "st", TAPE | NOTLOADABLE },
     85     { "dat", "st", TAPE | NOTLOADABLE },
     86     { "exabyte", "st", TAPE | NOTLOADABLE },
     87 };
     88 #define MAXNICKLEN 12		/* at least enough room for the
     89 				   longest nickname */
     90 #define MAXDEVLEN (MAXNICKLEN + 7) /* "/dev/r" ... "a" */
     91 
     92 struct devtypes_s {
     93     char *name;
     94     int type;
     95 } devtypes[] = {
     96     { "diskette", DISK | NOTLOADABLE },
     97     { "floppy", DISK | NOTLOADABLE },
     98     { "cdrom", DISK | LOADABLE },
     99     { "disk", DISK | NOTLOADABLE },
    100     { "tape", TAPE | NOTLOADABLE },
    101 };
    102 
    103 int verbose_f = 0;
    104 int umount_f = 1;
    105 int load_f = 0;
    106 
    107 int main __P((int, char *[]));
    108 void usage __P((void));
    109 char *nick2dev __P((char *));
    110 char *nick2rdev __P((char *));
    111 int guess_devtype __P((char *));
    112 char *guess_nickname __P((char *));
    113 void eject_tape __P((char *));
    114 void eject_disk __P((char *));
    115 void unmount_dev __P((char *));
    116 
    117 int
    118 main(int argc,
    119      char *argv[])
    120 {
    121     int ch;
    122     int devtype = -1;
    123     int n, i;
    124     char *devname = NULL;
    125 
    126     while((ch = getopt(argc, argv, "d:flnt:v")) != -1) {
    127 	switch(ch) {
    128 	case 'd':
    129 	    devname = optarg;
    130 	    break;
    131 	case 'f':
    132 	    umount_f = 0;
    133 	    break;
    134 	case 'l':
    135 	    load_f = 1;
    136 	    break;
    137 	case 'n':
    138 	    for(n = 0; n < sizeof(nicknames) / sizeof(nicknames[0]);
    139 		n++) {
    140 		struct nicknames_s *np = &nicknames[n];
    141 
    142 		printf("%s -> %s\n", np->name, nick2dev(np->name));
    143 	    }
    144 	    return(0);
    145 	case 't':
    146 	    for(i = 0; i < sizeof(devtypes) / sizeof(devtypes[0]);
    147 		i++) {
    148 		if(strcasecmp(devtypes[i].name, optarg) == 0) {
    149 		    devtype = devtypes[i].type;
    150 		    break;
    151 		}
    152 	    }
    153 	    if(devtype == -1) {
    154 		errx(1, "%s: unknown device type\n", optarg);
    155 	    }
    156 	    break;
    157 	case 'v':
    158 	    verbose_f = 1;
    159 	    break;
    160 	default:
    161 	    warnx("-%c: unknown switch", ch);
    162 	    usage();
    163 	    /* NOTREACHED */
    164 	}
    165     }
    166     argc -= optind;
    167     argv += optind;
    168 
    169     if(devname == NULL) {
    170 	if(argc == 0) {
    171 	    usage();
    172 	    /* NOTREACHED */
    173 	} else
    174 	    devname = argv[0];
    175     }
    176 
    177 
    178     if(devtype == -1) {
    179 	devtype = guess_devtype(devname);
    180     }
    181     if(devtype == -1) {
    182 	errx(1, "%s: unable to determine type of device",
    183 	     devname);
    184     }
    185     if(verbose_f) {
    186 	printf("device type == ");
    187 	if((devtype & TYPEMASK) == TAPE)
    188 	    printf("tape\n");
    189 	else
    190 	    printf("disk, floppy, or cdrom\n");
    191     }
    192 
    193     if(umount_f)
    194 	unmount_dev(devname);
    195 
    196     /* XXX Tapes and disks have different ioctl's: */
    197     if((devtype & TYPEMASK) == TAPE)
    198 	eject_tape(devname);
    199     else
    200 	eject_disk(devname);
    201 
    202     if(verbose_f)
    203 	printf("done.\n");
    204 
    205     return(0);
    206 }
    207 
    208 void
    209 usage(void)
    210 {
    211     errx(1, "Usage: eject [-n][-f][-v][-l][-t type][-d] device | nickname");
    212 }
    213 
    214 int
    215 guess_devtype(char *devname)
    216 {
    217     int n;
    218 
    219     /* Nickname match: */
    220     for(n = 0; n < sizeof(nicknames) / sizeof(nicknames[0]);
    221 	n++) {
    222 	if(strncasecmp(nicknames[n].name, devname,
    223 		       strlen(nicknames[n].name)) == 0)
    224 	    return(nicknames[n].type);
    225     }
    226 
    227     /*
    228      * If we still don't know it, then try to compare vs. dev
    229      * and rdev names that we know.
    230      */
    231     /* dev first: */
    232     for(n = 0; n < sizeof(nicknames) / sizeof(nicknames[0]); n++) {
    233 	char *name;
    234 	name = nick2dev(nicknames[n].name);
    235 	/*
    236 	 * Assume that the part of the name that distinguishes the
    237 	 * instance of this device begins with a 0.
    238 	 */
    239 	*(strchr(name, '0')) = '\0';
    240 	if(strncmp(name, devname, strlen(name)) == 0)
    241 	    return(nicknames[n].type);
    242     }
    243 
    244     /* Now rdev: */
    245     for(n = 0; n < sizeof(nicknames) / sizeof(nicknames[0]); n++) {
    246 	char *name = nick2rdev(nicknames[n].name);
    247 	*(strchr(name, '0')) = '\0';
    248 	if(strncmp(name, devname, strlen(name)) == 0)
    249 	    return(nicknames[n].type);
    250     }
    251 
    252     /* Not found. */
    253     return(-1);
    254 }
    255 
    256 /* "floppy5" -> "/dev/fd5a".  Yep, this uses a static buffer. */
    257 char *
    258 nick2dev(char *nn)
    259 {
    260     int n;
    261     static char devname[MAXDEVLEN];
    262     int devnum = 0;
    263 
    264     for(n = 0; n < sizeof(nicknames) / sizeof(nicknames[0]); n++) {
    265 	if(strncasecmp(nicknames[n].name, nn,
    266 		       strlen(nicknames[n].name)) == 0) {
    267 	    sscanf(nn, "%*[^0-9]%d", &devnum);
    268 	    sprintf(devname, "/dev/%s%d", nicknames[n].devname,
    269 		    devnum);
    270 	    if((nicknames[n].type & TYPEMASK) != TAPE)
    271 		strcat(devname, "a");
    272 	    return(devname);
    273 	}
    274     }
    275 
    276     return(NULL);
    277 }
    278 
    279 /* "floppy5" -> "/dev/rfd5c".  Static buffer. */
    280 char *
    281 nick2rdev(char *nn)
    282 {
    283     int n;
    284     static char devname[MAXDEVLEN];
    285     int devnum = 0;
    286 
    287     for(n = 0; n < sizeof(nicknames) / sizeof(nicknames[0]); n++) {
    288 	if(strncasecmp(nicknames[n].name, nn,
    289 		       strlen(nicknames[n].name)) == 0) {
    290 	    sscanf(nn, "%*[^0-9]%d", &devnum);
    291 	    sprintf(devname, "/dev/r%s%d", nicknames[n].devname,
    292 		    devnum);
    293 	    if((nicknames[n].type & TYPEMASK) != TAPE) {
    294 		strcat(devname, "a");
    295 		devname[strlen(devname) - 1] += RAW_PART;
    296 	    }
    297 	    return(devname);
    298 	}
    299     }
    300 
    301     return(NULL);
    302 }
    303 
    304 /* Unmount all filesystems attached to dev. */
    305 void
    306 unmount_dev(char *name)
    307 {
    308     struct statfs *mounts;
    309     int i, nmnts, len;
    310     char *dn;
    311 
    312     nmnts = getmntinfo(&mounts, MNT_NOWAIT);
    313     if(nmnts == 0) {
    314 	err(1, "getmntinfo");
    315     }
    316 
    317     /* Make sure we have a device name: */
    318     dn = nick2dev(name);
    319     if(dn == NULL)
    320 	dn = name;
    321 
    322     /* Set len to strip off the partition name: */
    323     len = strlen(dn);
    324     if(!isdigit(dn[len - 1]))
    325 	len--;
    326     if(!isdigit(dn[len - 1])) {
    327 	errx(1, "Can't figure out base name for dev name %s", dn);
    328     }
    329 
    330     for(i = 0; i < nmnts; i++) {
    331 	if(strncmp(mounts[i].f_mntfromname, dn, len) == 0) {
    332 	    if(verbose_f)
    333 		printf("Unmounting %s from %s...\n",
    334 		       mounts[i].f_mntfromname,
    335 		       mounts[i].f_mntonname);
    336 
    337 	    if(unmount(mounts[i].f_mntonname, 0) == -1) {
    338 		err(1, "unmount: %s", mounts[i].f_mntonname);
    339 	    }
    340 	}
    341     }
    342 
    343     return;
    344 }
    345 
    346 void
    347 eject_tape(char *name)
    348 {
    349     struct mtop m;
    350     int fd;
    351     char *dn;
    352 
    353     dn = nick2rdev(name);
    354     if(dn == NULL) {
    355 	dn = name;		/* Hope for the best. */
    356     }
    357 
    358     fd = open(dn, O_RDONLY);
    359     if(fd == -1) {
    360 	err(1, "open: %s", dn);
    361     }
    362 
    363     if(verbose_f)
    364 	printf("Ejecting %s...\n", dn);
    365 
    366     m.mt_op = MTOFFL;
    367     m.mt_count = 0;
    368     if(ioctl(fd, MTIOCTOP, &m) == -1) {
    369 	err(1, "ioctl: MTIOCTOP: %s", dn);
    370     }
    371 
    372     close(fd);
    373     return;
    374 }
    375 
    376 void
    377 eject_disk(char *name)
    378 {
    379     int fd;
    380     char *dn;
    381     int arg;
    382 
    383     dn = nick2rdev(name);
    384     if(dn == NULL) {
    385 	dn = name;		/* Hope for the best. */
    386     }
    387 
    388     fd = open(dn, O_RDONLY);
    389     if(fd == -1) {
    390 	err(1, "open: %s", dn);
    391     }
    392 
    393     if(load_f) {
    394 	if(verbose_f)
    395 	    printf("Closing %s...\n", dn);
    396 
    397 	if(ioctl(fd, CDIOCCLOSE, NULL) == -1) {
    398 	    err(1, "ioctl: CDIOCCLOSE: %s", dn);
    399 	}
    400     } else {
    401 	if(verbose_f)
    402 	    printf("Ejecting %s...\n", dn);
    403 
    404 	arg = 0;
    405 	if (umount_f == 0) {
    406 	    /* force eject, unlock the device first */
    407 	    if(ioctl(fd, DIOCLOCK, &arg) == -1)
    408 		err(1, "ioctl: DIOCEJECT: %s", dn);
    409 	    arg = 1;
    410 	}
    411 	if(ioctl(fd, DIOCEJECT, &arg) == -1)
    412 	    err(1, "ioctl: DIOCEJECT: %s", dn);
    413     }
    414 
    415     close(fd);
    416     return;
    417 }
    418