Merge branch 'clang' of https://github.com/neheb/util-linux

[thirdparty/util-linux.git] / sys-utils / eject.c

/*
 * Copyright (C) 1994-2005 Jeff Tranter (tranter@pobox.com)
 * Copyright (C) 2012 Karel Zak <kzak@redhat.com>
 * Copyright (C) Michal Luscon <mluscon@redhat.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <limits.h>
#include <err.h>
#include <stdarg.h>

#include <getopt.h>
#include <errno.h>
#include <regex.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/wait.h>
#include <sys/mtio.h>
#include <linux/cdrom.h>
#include <linux/fd.h>
#include <sys/mount.h>
#include <scsi/scsi.h>
#include <scsi/sg.h>
#include <scsi/scsi_ioctl.h>
#include <sys/time.h>

#include <libmount.h>

#include "c.h"
#include "closestream.h"
#include "nls.h"
#include "strutils.h"
#include "xalloc.h"
#include "pathnames.h"
#include "sysfs.h"
#include "monotonic.h"

/*
 * sg_io_hdr_t driver_status -- see kernel include/scsi/scsi.h
 */
#ifndef DRIVER_SENSE
# define DRIVER_SENSE   0x08
#endif


#define EJECT_DEFAULT_DEVICE "/dev/cdrom"


/* Used by the toggle_tray() function. If ejecting the tray takes this
 * time or less, the tray was probably already ejected, so we close it
 * again.
 */
#define TRAY_WAS_ALREADY_OPEN_USECS  200000     /* about 0.2 seconds */

struct eject_control {
        struct libmnt_table *mtab;
        char *device;                   /* device or mount point to be ejected */
        int fd;                         /* file descriptor for device */
        unsigned int                    /* command flags and arguments */
                a_option:1,
                c_option:1,
                d_option:1,
                F_option:1,
                f_option:1,
                i_option:1,
                M_option:1,
                m_option:1,
                n_option:1,
                p_option:1,
                q_option:1,
                r_option:1,
                s_option:1,
                T_option:1,
                t_option:1,
                v_option:1,
                X_option:1,
                x_option:1,
                a_arg:1,
                i_arg:1;

        unsigned int force_exclusive;   /* use O_EXCL */

        long int c_arg;                 /* changer slot number */
        long int x_arg;                 /* cd speed */
};

static void vinfo(const char *fmt, va_list va)
{
        fprintf(stdout, "%s: ", program_invocation_short_name);
        vprintf(fmt, va);
        fputc('\n', stdout);
}

static inline void verbose(const struct eject_control *ctl, const char *fmt, ...)
{
        va_list va;

        if (!ctl->v_option)
                return;

        va_start(va, fmt);
        vinfo(fmt, va);
        va_end(va);
}

static inline void info(const char *fmt, ...)
{
        va_list va;
        va_start(va, fmt);
        vinfo(fmt, va);
        va_end(va);
}

static void __attribute__((__noreturn__)) usage(void)
{
        FILE *out = stdout;
        fputs(USAGE_HEADER, out);
        fprintf(out,
                _(" %s [options] [<device>|<mountpoint>]\n"), program_invocation_short_name);

        fputs(USAGE_SEPARATOR, out);
        fputs(_("Eject removable media.\n"), out);

        fputs(USAGE_OPTIONS, out);
        fputs(_(" -a, --auto <on|off>         turn auto-eject feature on or off\n"
                " -c, --changerslot <slot>    switch discs on a CD-ROM changer\n"
                " -d, --default               display default device\n"
                " -f, --floppy                eject floppy\n"
                " -F, --force                 don't care about device type\n"
                " -i, --manualeject <on|off>  toggle manual eject protection on/off\n"
                " -m, --no-unmount            do not unmount device even if it is mounted\n"
                " -M, --no-partitions-unmount do not unmount another partitions\n"
                " -n, --noop                  don't eject, just show device found\n"
                " -p, --proc                  use /proc/mounts instead of /etc/mtab\n"
                " -q, --tape                  eject tape\n"
                " -r, --cdrom                 eject CD-ROM\n"
                " -s, --scsi                  eject SCSI device\n"
                " -t, --trayclose             close tray\n"
                " -T, --traytoggle            toggle tray\n"
                " -v, --verbose               enable verbose output\n"
                " -x, --cdspeed <speed>       set CD-ROM max speed\n"
                " -X, --listspeed             list CD-ROM available speeds\n"),
                out);

        fputs(USAGE_SEPARATOR, out);
        printf(USAGE_HELP_OPTIONS(29));

        fputs(_("\nBy default tries -r, -s, -f, and -q in order until success.\n"), out);
        printf(USAGE_MAN_TAIL("eject(1)"));

        exit(EXIT_SUCCESS);
}


/* Handle command line options. */
static void parse_args(struct eject_control *ctl, int argc, char **argv)
{
        static const struct option long_opts[] =
        {
                {"auto",        required_argument, NULL, 'a'},
                {"cdrom",       no_argument,       NULL, 'r'},
                {"cdspeed",     required_argument, NULL, 'x'},
                {"changerslot", required_argument, NULL, 'c'},
                {"default",     no_argument,       NULL, 'd'},
                {"floppy",      no_argument,       NULL, 'f'},
                {"force",       no_argument,       NULL, 'F'},
                {"help",        no_argument,       NULL, 'h'},
                {"listspeed",   no_argument,       NULL, 'X'},
                {"manualeject", required_argument, NULL, 'i'},
                {"noop",        no_argument,       NULL, 'n'},
                {"no-unmount",  no_argument,       NULL, 'm'},
                {"no-partitions-unmount", no_argument, NULL, 'M' },
                {"proc",        no_argument,       NULL, 'p'},
                {"scsi",        no_argument,       NULL, 's'},
                {"tape",        no_argument,       NULL, 'q'},
                {"trayclose",   no_argument,       NULL, 't'},
                {"traytoggle",  no_argument,       NULL, 'T'},
                {"verbose",     no_argument,       NULL, 'v'},
                {"version",     no_argument,       NULL, 'V'},
                {NULL, 0, NULL, 0}
        };
        int c;

        while ((c = getopt_long(argc, argv,
                                "a:c:i:x:dfFhnqrstTXvVpmM", long_opts, NULL)) != -1) {
                switch (c) {
                case 'a':
                        ctl->a_option = 1;
                        ctl->a_arg = parse_switch(optarg, _("argument error"),
                                                "on", "off",  "1", "0",  NULL);
                        break;
                case 'c':
                        ctl->c_option = 1;
                        ctl->c_arg = strtoul_or_err(optarg, _("invalid argument to --changerslot/-c option"));
                        break;
                case 'x':
                        ctl->x_option = 1;
                        ctl->x_arg = strtoul_or_err(optarg, _("invalid argument to --cdspeed/-x option"));
                        break;
                case 'd':
                        ctl->d_option = 1;
                        break;
                case 'f':
                        ctl->f_option = 1;
                        break;
                case 'F':
                        ctl->F_option = 1;
                        break;
                case 'i':
                        ctl->i_option = 1;
                        ctl->i_arg = parse_switch(optarg, _("argument error"),
                                                "on", "off",  "1", "0",  NULL);
                        break;
                case 'm':
                        ctl->m_option = 1;
                        break;
                case 'M':
                        ctl->M_option = 1;
                        break;
                case 'n':
                        ctl->n_option = 1;
                        break;
                case 'p':
                        ctl->p_option = 1;
                        break;
                case 'q':
                        ctl->q_option = 1;
                        break;
                case 'r':
                        ctl->r_option = 1;
                        break;
                case 's':
                        ctl->s_option = 1;
                        break;
                case 't':
                        ctl->t_option = 1;
                        break;
                case 'T':
                        ctl->T_option = 1;
                        break;
                case 'X':
                        ctl->X_option = 1;
                        break;
                case 'v':
                        ctl->v_option = 1;
                        break;

                case 'h':
                        usage();
                case 'V':
                        print_version(EXIT_SUCCESS);
                default:
                        errtryhelp(EXIT_FAILURE);
                        break;
                }
        }

        /* check for a single additional argument */
        if ((argc - optind) > 1)
                errx(EXIT_FAILURE, _("too many arguments"));

        if ((argc - optind) == 1)
                ctl->device = xstrdup(argv[optind]);
}

/*
 * Given name, such as foo, see if any of the following exist:
 *
 * foo (if foo starts with '.' or '/')
 * /dev/foo
 *
 * If found, return the full path. If not found, return 0.
 * Returns pointer to dynamically allocated string.
 */
static char *find_device(const char *name)
{
        if (!name)
                return NULL;

        if ((*name == '.' || *name == '/') && access(name, F_OK) == 0)
                return xstrdup(name);

        char buf[PATH_MAX];

        snprintf(buf, sizeof(buf), "/dev/%s", name);
        if (access(buf, F_OK) == 0)
                return xstrdup(buf);

        return NULL;
}

/* Set or clear auto-eject mode. */
static void auto_eject(const struct eject_control *ctl)
{
        int status = -1;

#if defined(CDROM_SET_OPTIONS) && defined(CDROM_CLEAR_OPTIONS)
        if (ctl->a_arg)
                status = ioctl(ctl->fd, CDROM_SET_OPTIONS, CDO_AUTO_EJECT);
        else
                status = ioctl(ctl->fd, CDROM_CLEAR_OPTIONS, CDO_AUTO_EJECT);
#else
        errno = ENOSYS;
#endif
        if (status < 0)
                err(EXIT_FAILURE,_("CD-ROM auto-eject command failed"));
}

/*
 * Stops CDROM from opening on manual eject button press.
 * This can be useful when you carry your laptop
 * in your bag while it's on and no CD inserted in it's drive.
 * Implemented as found in Documentation/ioctl/cdrom.txt
 */
static void manual_eject(const struct eject_control *ctl)
{
        if (ioctl(ctl->fd, CDROM_LOCKDOOR, ctl->i_arg) < 0) {
                switch (errno) {
                case EDRIVE_CANT_DO_THIS:
                        errx(EXIT_FAILURE, _("CD-ROM door lock is not supported"));
                case EBUSY:
                        errx(EXIT_FAILURE, _("other users have the drive open and not CAP_SYS_ADMIN"));
                default:
                        err(EXIT_FAILURE, _("CD-ROM lock door command failed"));
                }
        }

        if (ctl->i_arg)
                info(_("CD-Drive may NOT be ejected with device button"));
        else
                info(_("CD-Drive may be ejected with device button"));
}

/*
 * Changer select. CDROM_SELECT_DISC is preferred, older kernels used
 * CDROMLOADFROMSLOT.
 */
static void changer_select(const struct eject_control *ctl)
{
#ifdef CDROM_SELECT_DISC
        if (ioctl(ctl->fd, CDROM_SELECT_DISC, ctl->c_arg) < 0)
                err(EXIT_FAILURE, _("CD-ROM select disc command failed"));

#elif defined CDROMLOADFROMSLOT
        if (ioctl(ctl->fd, CDROMLOADFROMSLOT, ctl->c_arg) != 0)
                err(EXIT_FAILURE, _("CD-ROM load from slot command failed"));
#else
        warnx(_("IDE/ATAPI CD-ROM changer not supported by this kernel\n") );
#endif
}

/*
 * Close tray. Not supported by older kernels.
 */
static void close_tray(int fd)
{
        int status;

#if defined(CDROMCLOSETRAY) || defined(CDIOCCLOSE)
#if defined(CDROMCLOSETRAY)
        status = ioctl(fd, CDROMCLOSETRAY);
#elif defined(CDIOCCLOSE)
        status = ioctl(fd, CDIOCCLOSE);
#endif
        if (status != 0)
                err(EXIT_FAILURE, _("CD-ROM tray close command failed"));
#else
        warnx(_("CD-ROM tray close command not supported by this kernel\n"));
#endif
}

/*
 * Eject using CDROMEJECT ioctl.
 */
static int eject_cdrom(int fd)
{
#if defined(CDROMEJECT)
        int ret = ioctl(fd, CDROM_LOCKDOOR, 0);
        if (ret < 0)
                return 0;
        return ioctl(fd, CDROMEJECT) >= 0;
#elif defined(CDIOCEJECT)
        return ioctl(fd, CDIOCEJECT) >= 0;
#else
        warnx(_("CD-ROM eject unsupported"));
        errno = ENOSYS;
        return 0;
#endif
}

/*
 * Toggle tray.
 *
 * Written by Benjamin Schwenk <benjaminschwenk@yahoo.de> and
 * Sybren Stuvel <sybren@thirdtower.com>
 *
 * Not supported by older kernels because it might use
 * CloseTray().
 *
 */
static void toggle_tray(int fd)
{
#ifdef CDROM_DRIVE_STATUS
        /* First ask the CDROM for info, otherwise fall back to manual.  */
        switch (ioctl(fd, CDROM_DRIVE_STATUS)) {
        case CDS_TRAY_OPEN:
                close_tray(fd);
                return;

        case CDS_NO_DISC:
        case CDS_DISC_OK:
                if (!eject_cdrom(fd))
                        err(EXIT_FAILURE, _("CD-ROM eject command failed"));
                return;
        case CDS_NO_INFO:
                warnx(_("no CD-ROM information available"));
                return;
        case CDS_DRIVE_NOT_READY:
                warnx(_("CD-ROM drive is not ready"));
                return;
        default:
                err(EXIT_FAILURE, _("CD-ROM status command failed"));
        }
#else
        struct timeval time_start, time_stop;
        int time_elapsed;

        /* Try to open the CDROM tray and measure the time therefore
         * needed.  In my experience the function needs less than 0.05
         * seconds if the tray was already open, and at least 1.5 seconds
         * if it was closed.  */
        gettime_monotonic(&time_start);

        /* Send the CDROMEJECT command to the device. */
        if (!eject_cdrom(fd))
                err(EXIT_FAILURE, _("CD-ROM eject command failed"));

        /* Get the second timestamp, to measure the time needed to open
         * the tray.  */
        gettime_monotonic(&time_stop);

        time_elapsed = (time_stop.tv_sec * 1000000 + time_stop.tv_usec) -
                (time_start.tv_sec * 1000000 + time_start.tv_usec);

        /* If the tray "opened" too fast, we can be nearly sure, that it
         * was already open. In this case, close it now. Else the tray was
         * closed before. This would mean that we are done.  */
        if (time_elapsed < TRAY_WAS_ALREADY_OPEN_USECS)
                close_tray(fd);
#endif
}

/*
 * Select Speed of CD-ROM drive.
 * Thanks to Roland Krivanek (krivanek@fmph.uniba.sk)
 * http://dmpc.dbp.fmph.uniba.sk/~krivanek/cdrom_speed/
 */
static void select_speed(const struct eject_control *ctl)
{
#ifdef CDROM_SELECT_SPEED
        if (ioctl(ctl->fd, CDROM_SELECT_SPEED, ctl->x_arg) != 0)
                err(EXIT_FAILURE, _("CD-ROM select speed command failed"));
#else
        warnx(_("CD-ROM select speed command not supported by this kernel"));
#endif
}

/*
 * Read Speed of CD-ROM drive. From Linux 2.6.13, the current speed
 * is correctly reported
 */
static int read_speed(const char *devname)
{
        int drive_number = -1;
        char *name;
        FILE *f;

        f = fopen(_PATH_PROC_CDROMINFO, "r");
        if (!f)
                err(EXIT_FAILURE, _("cannot open %s"), _PATH_PROC_CDROMINFO);

        name = strrchr(devname, '/') + 1;

        while (name && !feof(f)) {
                char line[512];
                char *str;

                if (!fgets(line, sizeof(line), f))
                        break;

                /* find drive number in line "drive name" */
                if (drive_number == -1) {
                        if (strncmp(line, "drive name:", 11) == 0) {
                                str = strtok(&line[11], "\t ");
                                drive_number = 0;
                                while (str && strncmp(name, str, strlen(name)) != 0) {
                                        drive_number++;
                                        str = strtok(NULL, "\t ");
                                        if (!str)
                                                errx(EXIT_FAILURE,
                                                     _("%s: failed to finding CD-ROM name"),
                                                     _PATH_PROC_CDROMINFO);
                                }
                        }
                /* find line "drive speed" and read the correct speed */
                } else {
                        if (strncmp(line, "drive speed:", 12) == 0) {
                                int i;

                                str = strtok(&line[12], "\t ");
                                for (i = 1; i < drive_number; i++)
                                        str = strtok(NULL, "\t ");

                                if (!str)
                                        errx(EXIT_FAILURE,
                                                _("%s: failed to read speed"),
                                                _PATH_PROC_CDROMINFO);
                                fclose(f);
                                return atoi(str);
                        }
                }
        }

        errx(EXIT_FAILURE, _("failed to read speed"));
}

/*
 * List Speed of CD-ROM drive.
 */
static void list_speeds(struct eject_control *ctl)
{
        int max_speed, curr_speed = 0;

        select_speed(ctl);
        max_speed = read_speed(ctl->device);

        while (curr_speed < max_speed) {
                ctl->x_arg = curr_speed + 1;
                select_speed(ctl);
                curr_speed = read_speed(ctl->device);
                if (ctl->x_arg < curr_speed)
                        printf("%d ", curr_speed);
                else
                        curr_speed = ctl->x_arg + 1;
        }

        printf("\n");
}

/*
 * Eject using SCSI SG_IO commands. Return 1 if successful, 0 otherwise.
 */
static int eject_scsi(const struct eject_control *ctl)
{
        int status, k;
        sg_io_hdr_t io_hdr;
        unsigned char allowRmBlk[6] = {ALLOW_MEDIUM_REMOVAL, 0, 0, 0, 0, 0};
        unsigned char startStop1Blk[6] = {START_STOP, 0, 0, 0, 1, 0};
        unsigned char startStop2Blk[6] = {START_STOP, 0, 0, 0, 2, 0};
        unsigned char inqBuff[2];
        unsigned char sense_buffer[32];

        if ((ioctl(ctl->fd, SG_GET_VERSION_NUM, &k) < 0) || (k < 30000)) {
                verbose(ctl, _("not an sg device, or old sg driver"));
                return 0;
        }

        memset(&io_hdr, 0, sizeof(sg_io_hdr_t));
        io_hdr.interface_id = 'S';
        io_hdr.cmd_len = 6;
        io_hdr.mx_sb_len = sizeof(sense_buffer);
        io_hdr.dxfer_direction = SG_DXFER_NONE;
        io_hdr.dxfer_len = 0;
        io_hdr.dxferp = inqBuff;
        io_hdr.sbp = sense_buffer;
        io_hdr.timeout = 10000;

        io_hdr.cmdp = allowRmBlk;
        status = ioctl(ctl->fd, SG_IO, (void *)&io_hdr);
        if (status < 0 || io_hdr.host_status || io_hdr.driver_status)
                return 0;

        io_hdr.cmdp = startStop1Blk;
        status = ioctl(ctl->fd, SG_IO, (void *)&io_hdr);
        if (status < 0 || io_hdr.host_status)
                return 0;

        /* Ignore errors when there is not medium -- in this case driver sense
         * buffer sets MEDIUM NOT PRESENT (3a) bit. For more details see:
         * http://www.tldp.org/HOWTO/archived/SCSI-Programming-HOWTO/SCSI-Programming-HOWTO-22.html#sec-sensecodes
         * -- kzak Jun 2013
         */
        if (io_hdr.driver_status != 0 &&
            !(io_hdr.driver_status == DRIVER_SENSE && io_hdr.sbp &&
                                                      io_hdr.sbp[12] == 0x3a))
                return 0;

        io_hdr.cmdp = startStop2Blk;
        status = ioctl(ctl->fd, SG_IO, (void *)&io_hdr);
        if (status < 0 || io_hdr.host_status || io_hdr.driver_status)
                return 0;

        /* force kernel to reread partition table when new disc inserted */
        ioctl(ctl->fd, BLKRRPART);
        return 1;
}

/*
 * Eject using FDEJECT ioctl. Return 1 if successful, 0 otherwise.
 */
static int eject_floppy(int fd)
{
        return ioctl(fd, FDEJECT) >= 0;
}


/*
 * Rewind and eject using tape ioctl. Return 1 if successful, 0 otherwise.
 */
static int eject_tape(int fd)
{
        struct mtop op = { .mt_op = MTOFFL, .mt_count = 0 };

        return ioctl(fd, MTIOCTOP, &op) >= 0;
}


/* umount a device. */
static void umount_one(const struct eject_control *ctl, const char *name)
{
        int status;

        if (!name)
                return;

        verbose(ctl, _("%s: unmounting"), name);

        switch (fork()) {
        case 0: /* child */
                if (setgid(getgid()) < 0)
                        err(EXIT_FAILURE, _("cannot set group id"));

                if (setuid(getuid()) < 0)
                        err(EXIT_FAILURE, _("cannot set user id"));

                if (ctl->p_option)
                        execl("/bin/umount", "/bin/umount", name, "-n", NULL);
                else
                        execl("/bin/umount", "/bin/umount", name, NULL);

                errexec("/bin/umount");

        case -1:
                warn( _("unable to fork"));
                break;

        default: /* parent */
                wait(&status);
                if (WIFEXITED(status) == 0)
                        errx(EXIT_FAILURE,
                             _("unmount of `%s' did not exit normally"), name);

                if (WEXITSTATUS(status) != 0)
                        errx(EXIT_FAILURE, _("unmount of `%s' failed\n"), name);
                break;
        }
}

/* Open a device file. */
static void open_device(struct eject_control *ctl)
{
        int extra = ctl->F_option == 0 &&               /* never use O_EXCL on --force */
                    ctl->force_exclusive ? O_EXCL : 0;

        ctl->fd = open(ctl->device, O_RDWR | O_NONBLOCK | extra);
        if (ctl->fd < 0)
                ctl->fd = open(ctl->device, O_RDONLY | O_NONBLOCK | extra);
        if (ctl->fd == -1)
                err(EXIT_FAILURE, _("cannot open %s"), ctl->device);
}

/*
 * See if device has been mounted by looking in mount table.  If so, set
 * device name and mount point name, and return 1, otherwise return 0.
 */
static int device_get_mountpoint(struct eject_control *ctl, char **devname, char **mnt)
{
        struct libmnt_fs *fs;
        int rc;

        *mnt = NULL;

        if (!ctl->mtab) {
                struct libmnt_cache *cache;

                ctl->mtab = mnt_new_table();
                if (!ctl->mtab)
                        err(EXIT_FAILURE, _("failed to initialize libmount table"));

                cache = mnt_new_cache();
                mnt_table_set_cache(ctl->mtab, cache);
                mnt_unref_cache(cache);

                if (ctl->p_option)
                        rc = mnt_table_parse_file(ctl->mtab, _PATH_PROC_MOUNTINFO);
                else
                        rc = mnt_table_parse_mtab(ctl->mtab, NULL);
                if (rc)
                        err(EXIT_FAILURE, _("failed to parse mount table"));
        }

        fs = mnt_table_find_source(ctl->mtab, *devname, MNT_ITER_BACKWARD);
        if (!fs) {
                /* maybe 'devname' is mountpoint rather than a real device */
                fs = mnt_table_find_target(ctl->mtab, *devname, MNT_ITER_BACKWARD);
                if (fs) {
                        free(*devname);
                        *devname = xstrdup(mnt_fs_get_source(fs));
                }
        }

        if (fs)
                *mnt = xstrdup(mnt_fs_get_target(fs));
        return *mnt ? 0 : -1;
}

static char *get_disk_devname(const char *device)
{
        struct stat st;
        dev_t diskno = 0;
        char diskname[128];

        if (stat(device, &st) != 0)
                return NULL;

        /* get whole-disk devno */
        if (sysfs_devno_to_wholedisk(st.st_rdev, diskname,
                                sizeof(diskname), &diskno) != 0)
                return NULL;

        return st.st_rdev == diskno ? NULL : find_device(diskname);
}

/* umount all partitions if -M not specified, otherwise returns
 * number of the mounted partitions only.
 */
static int umount_partitions(struct eject_control *ctl)
{
        struct path_cxt *pc = NULL;
        dev_t devno;
        DIR *dir = NULL;
        struct dirent *d;
        int count = 0;

        devno = sysfs_devname_to_devno(ctl->device);
        if (devno)
                pc = ul_new_sysfs_path(devno, NULL, NULL);
        if (!pc)
                return 0;

        /* open /sys/block/<wholedisk> */
        if (!(dir = ul_path_opendir(pc, NULL)))
                goto done;

        /* scan for partition subdirs */
        while ((d = readdir(dir))) {
                if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
                        continue;

                if (sysfs_blkdev_is_partition_dirent(dir, d, ctl->device)) {
                        char *mnt = NULL;
                        char *dev = find_device(d->d_name);

                        if (dev && device_get_mountpoint(ctl, &dev, &mnt) == 0) {
                                verbose(ctl, _("%s: mounted on %s"), dev, mnt);
                                if (!ctl->M_option)
                                        umount_one(ctl, mnt);
                                count++;
                        }
                        free(dev);
                        free(mnt);
                }
        }

done:
        if (dir)
                closedir(dir);
        ul_unref_path(pc);

        return count;
}

static int is_hotpluggable(const struct eject_control *ctl)
{
        struct path_cxt *pc = NULL;
        dev_t devno;
        int rc = 0;

        devno = sysfs_devname_to_devno(ctl->device);
        if (devno)
                pc = ul_new_sysfs_path(devno, NULL, NULL);
        if (!pc)
                return 0;

        rc = sysfs_blkdev_is_hotpluggable(pc);
        ul_unref_path(pc);
        return rc;
}


/* handle -x option */
static void set_device_speed(struct eject_control *ctl)
{
        if (!ctl->x_option)
                return;

        if (ctl->x_arg == 0)
                verbose(ctl, _("setting CD-ROM speed to auto"));
        else
                verbose(ctl, _("setting CD-ROM speed to %ldX"), ctl->x_arg);

        open_device(ctl);
        select_speed(ctl);
        exit(EXIT_SUCCESS);
}


/* main program */
int main(int argc, char **argv)
{
        char *disk = NULL;
        char *mountpoint = NULL;
        int worked = 0;    /* set to 1 when successfully ejected */
        struct eject_control ctl = { NULL };

        setlocale(LC_ALL,"");
        bindtextdomain(PACKAGE, LOCALEDIR);
        textdomain(PACKAGE);
        close_stdout_atexit();

        /* parse the command line arguments */
        parse_args(&ctl, argc, argv);

        /* handle -d option */
        if (ctl.d_option) {
                info(_("default device: `%s'"), EJECT_DEFAULT_DEVICE);
                return EXIT_SUCCESS;
        }

        if (!ctl.device) {
                ctl.device = mnt_resolve_path(EJECT_DEFAULT_DEVICE, NULL);
                verbose(&ctl, _("using default device `%s'"), ctl.device);
        } else {
                char *p;

                if (ctl.device[strlen(ctl.device) - 1] == '/')
                        ctl.device[strlen(ctl.device) - 1] = '\0';

                /* figure out full device or mount point name */
                p = find_device(ctl.device);
                if (p)
                        free(ctl.device);
                else
                        p = ctl.device;

                ctl.device = mnt_resolve_spec(p, NULL);
                free(p);
        }

        if (!ctl.device)
                errx(EXIT_FAILURE, _("%s: unable to find device"), ctl.device);

        verbose(&ctl, _("device name is `%s'"), ctl.device);

        device_get_mountpoint(&ctl, &ctl.device, &mountpoint);
        if (mountpoint)
                verbose(&ctl, _("%s: mounted on %s"), ctl.device, mountpoint);
        else
                verbose(&ctl, _("%s: not mounted"), ctl.device);

        disk = get_disk_devname(ctl.device);
        if (disk) {
                verbose(&ctl, _("%s: disc device: %s (disk device will be used for eject)"), ctl.device, disk);
                free(ctl.device);
                ctl.device = disk;
                disk = NULL;
        } else {
                struct stat st;

                if (stat(ctl.device, &st) != 0 || !S_ISBLK(st.st_mode))
                        errx(EXIT_FAILURE, _("%s: not found mountpoint or device "
                                        "with the given name"), ctl.device);

                verbose(&ctl, _("%s: is whole-disk device"), ctl.device);
        }

        if (ctl.F_option == 0 && is_hotpluggable(&ctl) == 0)
                errx(EXIT_FAILURE, _("%s: is not hot-pluggable device"), ctl.device);

        /* handle -n option */
        if (ctl.n_option) {
                info(_("device is `%s'"), ctl.device);
                verbose(&ctl, _("exiting due to -n/--noop option"));
                return EXIT_SUCCESS;
        }

        /* handle -i option */
        if (ctl.i_option) {
                open_device(&ctl);
                manual_eject(&ctl);
                return EXIT_SUCCESS;
        }

        /* handle -a option */
        if (ctl.a_option) {
                if (ctl.a_arg)
                        verbose(&ctl, _("%s: enabling auto-eject mode"), ctl.device);
                else
                        verbose(&ctl, _("%s: disabling auto-eject mode"), ctl.device);
                open_device(&ctl);
                auto_eject(&ctl);
                return EXIT_SUCCESS;
        }

        /* handle -t option */
        if (ctl.t_option) {
                verbose(&ctl, _("%s: closing tray"), ctl.device);
                open_device(&ctl);
                close_tray(ctl.fd);
                set_device_speed(&ctl);
                return EXIT_SUCCESS;
        }

        /* handle -T option */
        if (ctl.T_option) {
                verbose(&ctl, _("%s: toggling tray"), ctl.device);
                open_device(&ctl);
                toggle_tray(ctl.fd);
                set_device_speed(&ctl);
                return EXIT_SUCCESS;
        }

        /* handle -X option */
        if (ctl.X_option) {
                verbose(&ctl, _("%s: listing CD-ROM speed"), ctl.device);
                open_device(&ctl);
                list_speeds(&ctl);
                return EXIT_SUCCESS;
        }

        /* handle -x option only */
        if (!ctl.c_option)
                set_device_speed(&ctl);


        /*
         * Unmount all partitions if -m is not specified; or umount given
         * mountpoint if -M is specified, otherwise print error of another
         * partition is mounted.
         */
        if (!ctl.m_option) {
                int ct = umount_partitions(&ctl); /* umount all, or count mounted on -M */

                if (ct == 0 && mountpoint)
                        umount_one(&ctl, mountpoint); /* probably whole-device */

                if (ctl.M_option) {
                        if (ct == 1 && mountpoint)
                                umount_one(&ctl, mountpoint);
                        else if (ct)
                                errx(EXIT_FAILURE, _("error: %s: device in use"), ctl.device);
                }
                /* Now, we assume the device is no more used, use O_EXCL to be
                 * resistant against our bugs and possible races (someone else
                 * remounted the device).
                 */
                ctl.force_exclusive = 1;
        }

        /* handle -c option */
        if (ctl.c_option) {
                verbose(&ctl, _("%s: selecting CD-ROM disc #%ld"), ctl.device, ctl.c_arg);
                open_device(&ctl);
                changer_select(&ctl);
                set_device_speed(&ctl);
                return EXIT_SUCCESS;
        }

        /* if user did not specify type of eject, try all four methods */
        if (ctl.r_option + ctl.s_option + ctl.f_option + ctl.q_option == 0)
                ctl.r_option = ctl.s_option = ctl.f_option = ctl.q_option = 1;

        /* open device */
        open_device(&ctl);

        /* try various methods of ejecting until it works */
        if (ctl.r_option) {
                verbose(&ctl, _("%s: trying to eject using CD-ROM eject command"), ctl.device);
                worked = eject_cdrom(ctl.fd);
                verbose(&ctl, worked ? _("CD-ROM eject command succeeded") :
                                 _("CD-ROM eject command failed"));
        }

        if (ctl.s_option && !worked) {
                verbose(&ctl, _("%s: trying to eject using SCSI commands"), ctl.device);
                worked = eject_scsi(&ctl);
                verbose(&ctl, worked ? _("SCSI eject succeeded") :
                                 _("SCSI eject failed"));
        }

        if (ctl.f_option && !worked) {
                verbose(&ctl, _("%s: trying to eject using floppy eject command"), ctl.device);
                worked = eject_floppy(ctl.fd);
                verbose(&ctl, worked ? _("floppy eject command succeeded") :
                                 _("floppy eject command failed"));
        }

        if (ctl.q_option && !worked) {
                verbose(&ctl, _("%s: trying to eject using tape offline command"), ctl.device);
                worked = eject_tape(ctl.fd);
                verbose(&ctl, worked ? _("tape offline command succeeded") :
                                 _("tape offline command failed"));
        }

        if (!worked)
                errx(EXIT_FAILURE, _("unable to eject"));

        /* cleanup */
        close(ctl.fd);
        free(ctl.device);
        free(mountpoint);

        mnt_unref_table(ctl.mtab);

        return EXIT_SUCCESS;
}