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eject.c revision 1.13 
      1 /*	$NetBSD: eject.c,v 1.13 2001/01/21 09:55:40 mycroft 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 1.13 2001/01/21 09:55:40 mycroft 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     { "cdr", "cd", DISK | LOADABLE },
     83     { "cdrw", "cd", DISK | LOADABLE },
     84     { "dvdrom", "cd", DISK | LOADABLE },
     85     { "dvd", "cd", DISK | LOADABLE },
     86     { "dvdr", "cd", DISK | LOADABLE },
     87     { "dvdrw", "cd", DISK | LOADABLE },
     88     { "mcd", "mcd", DISK | LOADABLE }, /* XXX Is this true? */
     89     { "tape", "st", TAPE | NOTLOADABLE },
     90     { "st", "st", TAPE | NOTLOADABLE },
     91     { "dat", "st", TAPE | NOTLOADABLE },
     92     { "exabyte", "st", TAPE | NOTLOADABLE },
     93 };
     94 #define MAXNICKLEN 12		/* at least enough room for the
     95 				   longest nickname */
     96 #define MAXDEVLEN (MAXNICKLEN + 7) /* "/dev/r" ... "a" */
     97 
     98 struct devtypes_s {
     99     char *name;
    100     int type;
    101 } devtypes[] = {
    102     { "diskette", DISK | NOTLOADABLE },
    103     { "floppy", DISK | NOTLOADABLE },
    104     { "cdrom", DISK | LOADABLE },
    105     { "disk", DISK | NOTLOADABLE },
    106     { "tape", TAPE | NOTLOADABLE },
    107 };
    108 
    109 int verbose_f = 0;
    110 int umount_f = 1;
    111 int load_f = 0;
    112 
    113 int main __P((int, char *[]));
    114 void usage __P((void));
    115 char *nick2dev __P((char *));
    116 char *nick2rdev __P((char *));
    117 int guess_devtype __P((char *));
    118 char *guess_nickname __P((char *));
    119 void eject_tape __P((char *));
    120 void eject_disk __P((char *));
    121 void unmount_dev __P((char *));
    122 
    123 int
    124 main(int argc,
    125      char *argv[])
    126 {
    127     int ch;
    128     int devtype = -1;
    129     int n, i;
    130     char *devname = NULL;
    131 
    132     while((ch = getopt(argc, argv, "d:flnt:v")) != -1) {
    133 	switch(ch) {
    134 	case 'd':
    135 	    devname = optarg;
    136 	    break;
    137 	case 'f':
    138 	    umount_f = 0;
    139 	    break;
    140 	case 'l':
    141 	    load_f = 1;
    142 	    break;
    143 	case 'n':
    144 	    for(n = 0; n < sizeof(nicknames) / sizeof(nicknames[0]);
    145 		n++) {
    146 		struct nicknames_s *np = &nicknames[n];
    147 
    148 		printf("%s -> %s\n", np->name, nick2dev(np->name));
    149 	    }
    150 	    return(0);
    151 	case 't':
    152 	    for(i = 0; i < sizeof(devtypes) / sizeof(devtypes[0]);
    153 		i++) {
    154 		if(strcasecmp(devtypes[i].name, optarg) == 0) {
    155 		    devtype = devtypes[i].type;
    156 		    break;
    157 		}
    158 	    }
    159 	    if(devtype == -1) {
    160 		errx(1, "%s: unknown device type\n", optarg);
    161 	    }
    162 	    break;
    163 	case 'v':
    164 	    verbose_f = 1;
    165 	    break;
    166 	default:
    167 	    warnx("-%c: unknown switch", ch);
    168 	    usage();
    169 	    /* NOTREACHED */
    170 	}
    171     }
    172     argc -= optind;
    173     argv += optind;
    174 
    175     if(devname == NULL) {
    176 	if(argc == 0) {
    177 	    usage();
    178 	    /* NOTREACHED */
    179 	} else
    180 	    devname = argv[0];
    181     }
    182 
    183 
    184     if(devtype == -1) {
    185 	devtype = guess_devtype(devname);
    186     }
    187     if(devtype == -1) {
    188 	errx(1, "%s: unable to determine type of device",
    189 	     devname);
    190     }
    191     if(verbose_f) {
    192 	printf("device type == ");
    193 	if((devtype & TYPEMASK) == TAPE)
    194 	    printf("tape\n");
    195 	else
    196 	    printf("disk, floppy, or cdrom\n");
    197     }
    198 
    199     if(umount_f)
    200 	unmount_dev(devname);
    201 
    202     /* XXX Tapes and disks have different ioctl's: */
    203     if((devtype & TYPEMASK) == TAPE)
    204 	eject_tape(devname);
    205     else
    206 	eject_disk(devname);
    207 
    208     if(verbose_f)
    209 	printf("done.\n");
    210 
    211     return(0);
    212 }
    213 
    214 void
    215 usage(void)
    216 {
    217     errx(1, "Usage: eject [-n][-f][-v][-l][-t type][-d] device | nickname");
    218 }
    219 
    220 int
    221 guess_devtype(char *devname)
    222 {
    223     int n;
    224 
    225     /* Nickname match: */
    226     for(n = 0; n < sizeof(nicknames) / sizeof(nicknames[0]);
    227 	n++) {
    228 	if(strncasecmp(nicknames[n].name, devname,
    229 		       strlen(nicknames[n].name)) == 0)
    230 	    return(nicknames[n].type);
    231     }
    232 
    233     /*
    234      * If we still don't know it, then try to compare vs. dev
    235      * and rdev names that we know.
    236      */
    237     /* dev first: */
    238     for(n = 0; n < sizeof(nicknames) / sizeof(nicknames[0]); n++) {
    239 	char *name;
    240 	name = nick2dev(nicknames[n].name);
    241 	/*
    242 	 * Assume that the part of the name that distinguishes the
    243 	 * instance of this device begins with a 0.
    244 	 */
    245 	*(strchr(name, '0')) = '\0';
    246 	if(strncmp(name, devname, strlen(name)) == 0)
    247 	    return(nicknames[n].type);
    248     }
    249 
    250     /* Now rdev: */
    251     for(n = 0; n < sizeof(nicknames) / sizeof(nicknames[0]); n++) {
    252 	char *name = nick2rdev(nicknames[n].name);
    253 	*(strchr(name, '0')) = '\0';
    254 	if(strncmp(name, devname, strlen(name)) == 0)
    255 	    return(nicknames[n].type);
    256     }
    257 
    258     /* Not found. */
    259     return(-1);
    260 }
    261 
    262 /* "floppy5" -> "/dev/fd5a".  Yep, this uses a static buffer. */
    263 char *
    264 nick2dev(char *nn)
    265 {
    266     int n;
    267     static char devname[MAXDEVLEN];
    268     int devnum = 0;
    269 
    270     for(n = 0; n < sizeof(nicknames) / sizeof(nicknames[0]); n++) {
    271 	if(strncasecmp(nicknames[n].name, nn,
    272 		       strlen(nicknames[n].name)) == 0) {
    273 	    sscanf(nn, "%*[^0-9]%d", &devnum);
    274 	    sprintf(devname, "/dev/%s%d", nicknames[n].devname,
    275 		    devnum);
    276 	    if((nicknames[n].type & TYPEMASK) != TAPE)
    277 		strcat(devname, "a");
    278 	    return(devname);
    279 	}
    280     }
    281 
    282     return(NULL);
    283 }
    284 
    285 /* "floppy5" -> "/dev/rfd5c".  Static buffer. */
    286 char *
    287 nick2rdev(char *nn)
    288 {
    289     int n;
    290     static char devname[MAXDEVLEN];
    291     int devnum = 0;
    292 
    293     for(n = 0; n < sizeof(nicknames) / sizeof(nicknames[0]); n++) {
    294 	if(strncasecmp(nicknames[n].name, nn,
    295 		       strlen(nicknames[n].name)) == 0) {
    296 	    sscanf(nn, "%*[^0-9]%d", &devnum);
    297 	    sprintf(devname, "/dev/r%s%d", nicknames[n].devname,
    298 		    devnum);
    299 	    if((nicknames[n].type & TYPEMASK) != TAPE) {
    300 		strcat(devname, "a");
    301 		devname[strlen(devname) - 1] += RAW_PART;
    302 	    }
    303 	    return(devname);
    304 	}
    305     }
    306 
    307     return(NULL);
    308 }
    309 
    310 /* Unmount all filesystems attached to dev. */
    311 void
    312 unmount_dev(char *name)
    313 {
    314     struct statfs *mounts;
    315     int i, nmnts, len;
    316     char *dn;
    317 
    318     nmnts = getmntinfo(&mounts, MNT_NOWAIT);
    319     if(nmnts == 0) {
    320 	err(1, "getmntinfo");
    321     }
    322 
    323     /* Make sure we have a device name: */
    324     dn = nick2dev(name);
    325     if(dn == NULL)
    326 	dn = name;
    327 
    328     /* Set len to strip off the partition name: */
    329     len = strlen(dn);
    330     if(!isdigit(dn[len - 1]))
    331 	len--;
    332     if(!isdigit(dn[len - 1])) {
    333 	errx(1, "Can't figure out base name for dev name %s", dn);
    334     }
    335 
    336     for(i = 0; i < nmnts; i++) {
    337 	if(strncmp(mounts[i].f_mntfromname, dn, len) == 0) {
    338 	    if(verbose_f)
    339 		printf("Unmounting %s from %s...\n",
    340 		       mounts[i].f_mntfromname,
    341 		       mounts[i].f_mntonname);
    342 
    343 	    if(unmount(mounts[i].f_mntonname, 0) == -1) {
    344 		err(1, "unmount: %s", mounts[i].f_mntonname);
    345 	    }
    346 	}
    347     }
    348 
    349     return;
    350 }
    351 
    352 void
    353 eject_tape(char *name)
    354 {
    355     struct mtop m;
    356     int fd;
    357     char *dn;
    358 
    359     dn = nick2rdev(name);
    360     if(dn == NULL) {
    361 	dn = name;		/* Hope for the best. */
    362     }
    363 
    364     fd = open(dn, O_RDONLY);
    365     if(fd == -1) {
    366 	err(1, "open: %s", dn);
    367     }
    368 
    369     if(verbose_f)
    370 	printf("Ejecting %s...\n", dn);
    371 
    372     m.mt_op = MTOFFL;
    373     m.mt_count = 0;
    374     if(ioctl(fd, MTIOCTOP, &m) == -1) {
    375 	err(1, "ioctl: MTIOCTOP: %s", dn);
    376     }
    377 
    378     close(fd);
    379     return;
    380 }
    381 
    382 void
    383 eject_disk(char *name)
    384 {
    385     int fd;
    386     char *dn;
    387     int arg;
    388 
    389     dn = nick2rdev(name);
    390     if(dn == NULL) {
    391 	dn = name;		/* Hope for the best. */
    392     }
    393 
    394     fd = open(dn, O_RDONLY);
    395     if(fd == -1) {
    396 	err(1, "open: %s", dn);
    397     }
    398 
    399     if(load_f) {
    400 	if(verbose_f)
    401 	    printf("Closing %s...\n", dn);
    402 
    403 	if(ioctl(fd, CDIOCCLOSE, NULL) == -1) {
    404 	    err(1, "ioctl: CDIOCCLOSE: %s", dn);
    405 	}
    406     } else {
    407 	if(verbose_f)
    408 	    printf("Ejecting %s...\n", dn);
    409 
    410 	arg = 0;
    411 	if (umount_f == 0) {
    412 	    /* force eject, unlock the device first */
    413 	    if(ioctl(fd, DIOCLOCK, &arg) == -1)
    414 		err(1, "ioctl: DIOCEJECT: %s", dn);
    415 	    arg = 1;
    416 	}
    417 	if(ioctl(fd, DIOCEJECT, &arg) == -1)
    418 	    err(1, "ioctl: DIOCEJECT: %s", dn);
    419     }
    420 
    421     close(fd);
    422     return;
    423 }
    424