#include "xalloc.h"
#include "pathnames.h"
#include "sysfs.h"
+#include "monotonic.h"
/*
* sg_io_hdr_t driver_status -- see kernel include/scsi/scsi.h
*/
#define TRAY_WAS_ALREADY_OPEN_USECS 200000 /* about 0.2 seconds */
-/* eject(1) is able to eject only 'removable' devices (attribute in /sys)
- * _or_ devices connected by hotplug subsystem.
- */
-static const char * const hotplug_subsystems[] = {
- "usb",
- "ieee1394",
- "pcmcia",
- "mmc",
- "ccw"
-};
-
struct eject_control {
struct libmnt_table *mtab;
char *device; /* device or mount point to be ejected */
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 */
};
va_end(va);
}
-static void __attribute__ ((__noreturn__)) usage(FILE * out)
+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"
out);
fputs(USAGE_SEPARATOR, out);
- fputs(USAGE_HELP, out);
- fputs(USAGE_VERSION, out);
+ printf(USAGE_HELP_OPTIONS(29));
fputs(_("\nBy default tries -r, -s, -f, and -q in order until success.\n"), out);
- fprintf(out, USAGE_MAN_TAIL("eject(1)"));
+ printf(USAGE_MAN_TAIL("eject(1)"));
- exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS);
+ exit(EXIT_SUCCESS);
}
{"traytoggle", no_argument, NULL, 'T'},
{"verbose", no_argument, NULL, 'v'},
{"version", no_argument, NULL, 'V'},
- {0, 0, 0, 0}
+ {NULL, 0, NULL, 0}
};
int c;
switch (c) {
case 'a':
ctl->a_option = 1;
- if (!strcmp(optarg, "0") || !strcmp(optarg, "off"))
- ctl->a_arg = 0;
- else if (!strcmp(optarg, "1") || !strcmp(optarg, "on"))
- ctl->a_arg = 1;
- else
- errx(EXIT_FAILURE, _("invalid argument to --auto/-a option"));
+ ctl->a_arg = parse_switch(optarg, _("argument error"),
+ "on", "off", "1", "0", NULL);
break;
case 'c':
ctl->c_option = 1;
case 'F':
ctl->F_option = 1;
break;
- case 'h':
- usage(stdout);
- break;
case 'i':
ctl->i_option = 1;
- if (!strcmp(optarg, "0") || !strcmp(optarg, "off"))
- ctl->i_arg = 0;
- else if (!strcmp(optarg, "1") || !strcmp(optarg, "on"))
- ctl->i_arg = 1;
- else
- errx(EXIT_FAILURE, _("invalid argument to --manualeject/-i option"));
+ ctl->i_arg = parse_switch(optarg, _("argument error"),
+ "on", "off", "1", "0", NULL);
break;
case 'm':
ctl->m_option = 1;
case 'v':
ctl->v_option = 1;
break;
+
+ case 'h':
+ usage();
case 'V':
- printf(UTIL_LINUX_VERSION);
- exit(EXIT_SUCCESS);
- break;
+ print_version(EXIT_SUCCESS);
default:
- case '?':
- usage(stderr);
+ errtryhelp(EXIT_FAILURE);
break;
}
}
if ((*name == '.' || *name == '/') && access(name, F_OK) == 0)
return xstrdup(name);
- else {
- char buf[PATH_MAX];
- snprintf(buf, sizeof(buf), "/dev/%s", name);
- if (access(buf, F_OK) == 0)
- return xstrdup(buf);
- }
+ char buf[PATH_MAX];
+
+ snprintf(buf, sizeof(buf), "/dev/%s", name);
+ if (access(buf, F_OK) == 0)
+ return xstrdup(buf);
return NULL;
}
}
/*
- * Stops CDROM from opening on manual eject pressing the button.
+ * 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
- *
- * TODO: Maybe we should check this also:
- * EDRIVE_CANT_DO_THIS Door lock function not supported.
- * EBUSY Attempt to unlock when multiple users
- * have the drive open and not CAP_SYS_ADMIN
+ * Implemented as found in Documentation/userspace-api/ioctl/cdrom.rst
*/
static void manual_eject(const struct eject_control *ctl)
{
- if (ioctl(ctl->fd, CDROM_LOCKDOOR, ctl->i_arg) < 0)
- err(EXIT_FAILURE, _("CD-ROM lock door command failed"));
+ 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"));
*/
static void toggle_tray(int fd)
{
- struct timeval time_start, time_stop;
- int time_elapsed;
-
#ifdef CDROM_DRIVE_STATUS
/* First ask the CDROM for info, otherwise fall back to manual. */
switch (ioctl(fd, CDROM_DRIVE_STATUS)) {
warnx(_("CD-ROM drive is not ready"));
return;
default:
- abort();
+ err(EXIT_FAILURE, _("CD-ROM status command failed"));
}
-#endif
+#else
+ struct timeval time_start, time_stop;
+ int time_elapsed;
- /* Try to open the CDROM tray and measure the time therefor
+ /* 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. */
- gettimeofday(&time_start, NULL);
+ gettime_monotonic(&time_start);
/* Send the CDROMEJECT command to the device. */
if (!eject_cdrom(fd))
/* Get the second timestamp, to measure the time needed to open
* the tray. */
- gettimeofday(&time_stop, NULL);
+ gettime_monotonic(&time_stop);
time_elapsed = (time_stop.tv_sec * 1000000 + time_stop.tv_usec) -
(time_start.tv_sec * 1000000 + time_start.tv_usec);
* closed before. This would mean that we are done. */
if (time_elapsed < TRAY_WAS_ALREADY_OPEN_USECS)
close_tray(fd);
+#endif
}
/*
* Thanks to Roland Krivanek (krivanek@fmph.uniba.sk)
* http://dmpc.dbp.fmph.uniba.sk/~krivanek/cdrom_speed/
*/
-static void select_speed(int fd, int speed)
+static void select_speed(const struct eject_control *ctl)
{
#ifdef CDROM_SELECT_SPEED
- if (ioctl(fd, CDROM_SELECT_SPEED, speed) != 0)
+ 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"));
/*
* List Speed of CD-ROM drive.
*/
-static void list_speeds(const struct eject_control *ctl)
+static void list_speeds(struct eject_control *ctl)
{
-#ifdef CDROM_SELECT_SPEED
- int max_speed, curr_speed = 0, prev_speed;
+ int max_speed, curr_speed = 0;
- select_speed(ctl->fd, 0);
+ select_speed(ctl);
max_speed = read_speed(ctl->device);
while (curr_speed < max_speed) {
- prev_speed = curr_speed;
- select_speed(ctl->fd, prev_speed + 1);
+ ctl->x_arg = curr_speed + 1;
+ select_speed(ctl);
curr_speed = read_speed(ctl->device);
- if (curr_speed > prev_speed)
+ if (ctl->x_arg < curr_speed)
printf("%d ", curr_speed);
else
- curr_speed = prev_speed + 1;
+ curr_speed = ctl->x_arg + 1;
}
printf("\n");
-#else
- warnx(_("CD-ROM select speed command not supported by this kernel"));
-#endif
}
/*
else
execl("/bin/umount", "/bin/umount", name, NULL);
- errx(EXIT_FAILURE, _("unable to exec /bin/umount of `%s'"), name);
+ errexec("/bin/umount");
case -1:
warn( _("unable to fork"));
}
/* Open a device file. */
-static int open_device(const char *name)
+static void open_device(struct eject_control *ctl)
{
- int fd = open(name, O_RDWR|O_NONBLOCK);
-
- if (fd < 0)
- fd = open(name, O_RDONLY|O_NONBLOCK);
- if (fd == -1)
- err(EXIT_FAILURE, _("cannot open %s"), name);
- return fd;
+ 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);
}
/*
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 sysfs_cxt cxt = UL_SYSFSCXT_EMPTY;
+ struct path_cxt *pc = NULL;
dev_t devno;
DIR *dir = NULL;
struct dirent *d;
int count = 0;
- devno = sysfs_devname_to_devno(ctl->device, NULL);
- if (sysfs_init(&cxt, devno, NULL) != 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 = sysfs_opendir(&cxt, NULL)))
+ if (!(dir = ul_path_opendir(pc, NULL)))
goto done;
/* scan for partition subdirs */
if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
continue;
- if (sysfs_is_partition_dirent(dir, d, ctl->device)) {
+ if (sysfs_blkdev_is_partition_dirent(dir, d, ctl->device)) {
char *mnt = NULL;
char *dev = find_device(d->d_name);
done:
if (dir)
closedir(dir);
- sysfs_deinit(&cxt);
+ ul_unref_path(pc);
return count;
}
-static int is_hotpluggable_subsystem(const char *name)
-{
- size_t i;
-
- for (i = 0; i < ARRAY_SIZE(hotplug_subsystems); i++)
- if (strcmp(name, hotplug_subsystems[i]) == 0)
- return 1;
-
- return 0;
-}
-
-#define SUBSYSTEM_LINKNAME "/subsystem"
-
-/*
- * For example:
- *
- * chain: /sys/dev/block/../../devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/ \
- * 1-1.2:1.0/host65/target65:0:0/65:0:0:0/block/sdb
- *
- * The function check if <chain>/subsystem symlink exists, if yes then returns
- * basename of the readlink result, and remove the last subdirectory from the
- * <chain> path.
- */
-static char *get_subsystem(char *chain, char *buf, size_t bufsz)
-{
- size_t len;
- char *p;
-
- if (!chain || !*chain)
- return NULL;
-
- len = strlen(chain);
- if (len + sizeof(SUBSYSTEM_LINKNAME) > PATH_MAX)
- return NULL;
-
- do {
- ssize_t sz;
-
- /* append "/subsystem" to the path */
- memcpy(chain + len, SUBSYSTEM_LINKNAME, sizeof(SUBSYSTEM_LINKNAME));
-
- /* try if subsystem symlink exists */
- sz = readlink(chain, buf, bufsz - 1);
-
- /* remove last subsystem from chain */
- chain[len] = '\0';
- p = strrchr(chain, '/');
- if (p) {
- *p = '\0';
- len = p - chain;
- }
-
- if (sz > 0) {
- /* we found symlink to subsystem, return basename */
- buf[sz] = '\0';
- return basename(buf);
- }
-
- } while (p);
-
- return NULL;
-}
-
static int is_hotpluggable(const struct eject_control *ctl)
{
- struct sysfs_cxt cxt = UL_SYSFSCXT_EMPTY;
- char devchain[PATH_MAX];
- char subbuf[PATH_MAX];
+ struct path_cxt *pc = NULL;
dev_t devno;
int rc = 0;
- ssize_t sz;
- char *sub;
- devno = sysfs_devname_to_devno(ctl->device, NULL);
- if (sysfs_init(&cxt, devno, NULL) != 0)
+ devno = sysfs_devname_to_devno(ctl->device);
+ if (devno)
+ pc = ul_new_sysfs_path(devno, NULL, NULL);
+ if (!pc)
return 0;
- /* check /sys/dev/block/<maj>:<min>/removable attribute */
- if (sysfs_read_int(&cxt, "removable", &rc) == 0 && rc == 1) {
- verbose(ctl, _("%s: is removable device"), ctl->device);
- goto done;
- }
-
- /* read /sys/dev/block/<maj>:<min> symlink */
- sz = sysfs_readlink(&cxt, NULL, devchain, sizeof(devchain));
- if (sz <= 0 || sz + sizeof(_PATH_SYS_DEVBLOCK "/") > sizeof(devchain))
- goto done;
-
- devchain[sz++] = '\0';
-
- /* create absolute patch from the link */
- memmove(devchain + sizeof(_PATH_SYS_DEVBLOCK "/") - 1, devchain, sz);
- memcpy(devchain, _PATH_SYS_DEVBLOCK "/",
- sizeof(_PATH_SYS_DEVBLOCK "/") - 1);
-
- while ((sub = get_subsystem(devchain, subbuf, sizeof(subbuf)))) {
- rc = is_hotpluggable_subsystem(sub);
- if (rc) {
- verbose(ctl, _("%s: connected by hotplug subsystem: %s"),
- ctl->device, sub);
- break;
- }
- }
-
-done:
- sysfs_deinit(&cxt);
+ rc = sysfs_blkdev_is_hotpluggable(pc);
+ ul_unref_path(pc);
return rc;
}
/* handle -x option */
-static void set_device_speed(const struct eject_control *ctl)
+static void set_device_speed(struct eject_control *ctl)
{
- int fd;
-
if (!ctl->x_option)
return;
else
verbose(ctl, _("setting CD-ROM speed to %ldX"), ctl->x_arg);
- fd = open_device(ctl->device);
- select_speed(fd, ctl->x_arg);
+ open_device(ctl);
+ select_speed(ctl);
exit(EXIT_SUCCESS);
}
char *disk = NULL;
char *mountpoint = NULL;
int worked = 0; /* set to 1 when successfully ejected */
- struct eject_control ctl = { 0 };
+ struct eject_control ctl = { NULL };
setlocale(LC_ALL,"");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
- atexit(close_stdout);
+ close_stdout_atexit();
/* parse the command line arguments */
parse_args(&ctl, argc, argv);
}
if (!ctl.device)
- errx(EXIT_FAILURE, _("%s: unable to find device"), ctl.device);
+ errx(EXIT_FAILURE, _("unable to find device"));
verbose(&ctl, _("device name is `%s'"), ctl.device);
/* handle -i option */
if (ctl.i_option) {
- ctl.fd = open_device(ctl.device);
+ open_device(&ctl);
manual_eject(&ctl);
return EXIT_SUCCESS;
}
verbose(&ctl, _("%s: enabling auto-eject mode"), ctl.device);
else
verbose(&ctl, _("%s: disabling auto-eject mode"), ctl.device);
- ctl.fd = open_device(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);
- ctl.fd = open_device(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);
- ctl.fd = open_device(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);
- ctl.fd = open_device(ctl.device);
+ open_device(&ctl);
list_speeds(&ctl);
return EXIT_SUCCESS;
}
* partition is mounted.
*/
if (!ctl.m_option) {
- int ct = umount_partitions(&ctl);
+ int ct = umount_partitions(&ctl); /* umount all, or count mounted on -M */
if (ct == 0 && mountpoint)
umount_one(&ctl, mountpoint); /* probably whole-device */
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);
- ctl.fd = open_device(ctl.device);
+ open_device(&ctl);
changer_select(&ctl);
set_device_speed(&ctl);
return EXIT_SUCCESS;
ctl.r_option = ctl.s_option = ctl.f_option = ctl.q_option = 1;
/* open device */
- ctl.fd = open_device(ctl.device);
+ open_device(&ctl);
/* try various methods of ejecting until it works */
if (ctl.r_option) {
projects / thirdparty / util-linux.git / blobdiff