161 lines
4.0 KiB
Diff
161 lines
4.0 KiB
Diff
--- util-linux-2.13-pre6/mount/losetup.8.all 2006-10-12 10:34:47.000000000 +0200
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+++ util-linux-2.13-pre6/mount/losetup.8 2006-10-12 10:37:35.000000000 +0200
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@@ -9,6 +9,8 @@
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.B losetup
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.I loop_device
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.sp
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+.B losetup -a
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+.sp
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.in -5
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Delete loop:
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.sp
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@@ -66,6 +68,8 @@
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.B \-e
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option.)
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.SH OPTIONS
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+.IP \fB\-a\fP
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+Show status of all loop devices.
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.IP \fB\-d\fP
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Detach the file or device associated with the specified loop device.
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.IP "\fB\-E \fIencryption_type\fP"
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--- util-linux-2.13-pre6/mount/lomount.c.all 2004-12-20 23:11:04.000000000 +0100
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+++ util-linux-2.13-pre6/mount/lomount.c 2006-10-12 10:29:55.000000000 +0200
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@@ -28,6 +28,8 @@
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extern char *xstrdup (const char *s); /* not: #include "sundries.h" */
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extern void error (const char *fmt, ...); /* idem */
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+#define SIZE(a) (sizeof(a)/sizeof(a[0]))
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+
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#ifdef LOOP_SET_FD
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static int
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@@ -128,6 +130,42 @@
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close (fd);
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return 1;
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}
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+
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+static int
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+show_used_loop_devices (void) {
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+ char dev[20];
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+ char *loop_formats[] = { "/dev/loop%d", "/dev/loop/%d" };
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+ int i, j, fd, permission = 0, somedev = 0;
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+ struct stat statbuf;
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+ struct loop_info loopinfo;
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+
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+ for (j = 0; j < SIZE(loop_formats); j++) {
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+ for(i = 0; i < 256; i++) {
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+ sprintf(dev, loop_formats[j], i);
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+ if (stat (dev, &statbuf) == 0 && S_ISBLK(statbuf.st_mode)) {
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+ somedev++;
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+ fd = open (dev, O_RDONLY);
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+ if (fd >= 0) {
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+ if(ioctl (fd, LOOP_GET_STATUS, &loopinfo) == 0)
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+ show_loop(dev);
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+ close (fd);
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+ somedev++;
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+ } else if (errno == EACCES)
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+ permission++;
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+ continue; /* continue trying as long as devices exist */
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+ }
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+ break;
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+ }
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+ }
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+
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+ if (somedev==0 && permission) {
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+ error(_("%s: no permission to look at /dev/loop#"), progname);
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+ return 1;
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+ }
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+ return 0;
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+}
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+
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+
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#endif
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int
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@@ -139,8 +177,6 @@
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major(statbuf.st_rdev) == LOOPMAJOR);
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}
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-#define SIZE(a) (sizeof(a)/sizeof(a[0]))
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-
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char *
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find_unused_loop_device (void) {
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/* Just creating a device, say in /tmp, is probably a bad idea -
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@@ -403,12 +439,13 @@
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static void
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usage(void) {
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- fprintf(stderr, _("usage:\n\
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- %s loop_device # give info\n\
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- %s -d loop_device # delete\n\
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- %s -f # find unused\n\
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- %s [-e encryption] [-o offset] {-f|loop_device} file # setup\n"),
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- progname, progname, progname, progname);
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+ fprintf(stderr, _("usage:\n"
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+ " %1$s loop_device # give info\n"
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+ " %1$s -d loop_device # delete\n"
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+ " %1$s -f # find unused\n"
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+ " %1$s -a # list all used\n"
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+ " %1$s [-e encryption] [-o offset] {-f|loop_device} file # setup\n"),
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+ progname);
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exit(1);
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}
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@@ -442,7 +479,7 @@
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int
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main(int argc, char **argv) {
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char *p, *offset, *encryption, *passfd, *device, *file;
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- int delete, find, c;
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+ int delete, find, c, all;
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int res = 0;
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int ro = 0;
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int pfd = -1;
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@@ -452,7 +489,7 @@
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bindtextdomain(PACKAGE, LOCALEDIR);
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textdomain(PACKAGE);
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- delete = find = 0;
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+ delete = find = all = 0;
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off = 0;
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offset = encryption = passfd = NULL;
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@@ -460,8 +497,11 @@
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if ((p = strrchr(progname, '/')) != NULL)
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progname = p+1;
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- while ((c = getopt(argc, argv, "de:E:fo:p:v")) != -1) {
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+ while ((c = getopt(argc, argv, "ade:E:fo:p:v")) != -1) {
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switch (c) {
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+ case 'a':
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+ all = 1;
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+ break;
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case 'd':
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delete = 1;
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break;
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@@ -489,17 +529,22 @@
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if (argc == 1) {
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usage();
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} else if (delete) {
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- if (argc != optind+1 || encryption || offset || find)
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+ if (argc != optind+1 || encryption || offset || find || all)
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usage();
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} else if (find) {
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- if (argc < optind || argc > optind+1)
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+ if (all || argc < optind || argc > optind+1)
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+ usage();
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+ } else if (all) {
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+ if (argc > 2)
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usage();
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} else {
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if (argc < optind+1 || argc > optind+2)
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usage();
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}
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- if (find) {
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+ if (all)
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+ return show_used_loop_devices();
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+ else if (find) {
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device = find_unused_loop_device();
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if (device == NULL)
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return -1;
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