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-rw-r--r--libblkid/dm.c138
1 files changed, 0 insertions, 138 deletions
diff --git a/libblkid/dm.c b/libblkid/dm.c
deleted file mode 100644
index 72ec9bd8e..000000000
--- a/libblkid/dm.c
+++ /dev/null
@@ -1,138 +0,0 @@
-/*
- * device-mapper (dm) topology
- * -- this is fallback for old systems where the topology information is not
- * exported by sysfs
- *
- * Copyright (C) 2009 Karel Zak <kzak@redhat.com>
- *
- * This file may be redistributed under the terms of the
- * GNU Lesser General Public License.
- *
- */
-#include <errno.h>
-#include <fcntl.h>
-#include <stdint.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include "topology.h"
-
-static int is_dm_device(dev_t devno)
-{
- return blkid_driver_has_major("device-mapper", major(devno));
-}
-
-static int probe_dm_tp(blkid_probe pr,
- const struct blkid_idmag *mag __attribute__((__unused__)))
-{
- const char *paths[] = {
- "/usr/local/sbin/dmsetup",
- "/usr/sbin/dmsetup",
- "/sbin/dmsetup"
- };
- int dmpipe[] = { -1, -1 }, stripes, stripesize;
- char *cmd = NULL;
- FILE *stream = NULL;
- long long offset, size;
- size_t i;
- dev_t devno = blkid_probe_get_devno(pr);
-
- if (!devno)
- goto nothing; /* probably not a block device */
- if (!is_dm_device(devno))
- goto nothing;
-
- for (i = 0; i < ARRAY_SIZE(paths); i++) {
- struct stat sb;
- if (stat(paths[i], &sb) == 0) {
- cmd = (char *) paths[i];
- break;
- }
- }
-
- if (!cmd)
- goto nothing;
- if (pipe(dmpipe) < 0) {
- DBG(DEBUG_LOWPROBE,
- printf("Failed to open pipe: errno=%d", errno));
- goto nothing;
- }
-
- switch (fork()) {
- case 0:
- {
- char *dmargv[7], maj[16], min[16];
-
- /* Plumbing */
- close(dmpipe[0]);
-
- if (dmpipe[1] != STDOUT_FILENO)
- dup2(dmpipe[1], STDOUT_FILENO);
-
- /* The libblkid library could linked with setuid programs */
- if (setgid(getgid()) < 0)
- exit(1);
- if (setuid(getuid()) < 0)
- exit(1);
-
- snprintf(maj, sizeof(maj), "%d", major(devno));
- snprintf(min, sizeof(min), "%d", minor(devno));
-
- dmargv[0] = cmd;
- dmargv[1] = "table";
- dmargv[2] = "-j";
- dmargv[3] = maj;
- dmargv[4] = "-m";
- dmargv[5] = min;
- dmargv[6] = NULL;
-
- execv(dmargv[0], dmargv);
-
- DBG(DEBUG_LOWPROBE,
- printf("Failed to execute %s: errno=%d", cmd, errno));
- exit(1);
- }
- case -1:
- DBG(DEBUG_LOWPROBE,
- printf("Failed to forking: errno=%d", errno));
- goto nothing;
- default:
- break;
- }
-
- stream = fdopen(dmpipe[0], "r");
- if (!stream)
- goto nothing;
-
- if (fscanf(stream, "%lld %lld striped %d %d ",
- &offset, &size, &stripes, &stripesize) != 0)
- goto nothing;
-
- blkid_topology_set_minimum_io_size(pr, stripesize << 9);
- blkid_topology_set_optimal_io_size(pr, (stripes * stripesize) << 9);
-
- fclose(stream);
- close(dmpipe[1]);
- return 0;
-
-nothing:
- if (stream)
- fclose(stream);
- else if (dmpipe[0] != -1)
- close(dmpipe[0]);
- if (dmpipe[1] != -1)
- close(dmpipe[1]);
- return 1;
-}
-
-const struct blkid_idinfo dm_tp_idinfo =
-{
- .name = "dm",
- .probefunc = probe_dm_tp,
- .magics = BLKID_NONE_MAGIC
-};
-