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Diffstat (limited to 'e2fsprogs/blkid/devname.c')
-rw-r--r--e2fsprogs/blkid/devname.c368
1 files changed, 0 insertions, 368 deletions
diff --git a/e2fsprogs/blkid/devname.c b/e2fsprogs/blkid/devname.c
deleted file mode 100644
index 3d11734..0000000
--- a/e2fsprogs/blkid/devname.c
+++ /dev/null
@@ -1,368 +0,0 @@
-/* vi: set sw=4 ts=4: */
-/*
- * devname.c - get a dev by its device inode name
- *
- * Copyright (C) Andries Brouwer
- * Copyright (C) 1999, 2000, 2001, 2002, 2003 Theodore Ts'o
- * Copyright (C) 2001 Andreas Dilger
- *
- * %Begin-Header%
- * This file may be redistributed under the terms of the
- * GNU Lesser General Public License.
- * %End-Header%
- */
-
-#include <stdio.h>
-#include <string.h>
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-#include <stdlib.h>
-#include <string.h>
-#include <ctype.h>
-#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-#include <sys/stat.h>
-#ifdef HAVE_ERRNO_H
-#include <errno.h>
-#endif
-#ifdef HAVE_SYS_MKDEV_H
-#include <sys/mkdev.h>
-#endif
-#include <time.h>
-
-#include "blkidP.h"
-
-/*
- * Find a dev struct in the cache by device name, if available.
- *
- * If there is no entry with the specified device name, and the create
- * flag is set, then create an empty device entry.
- */
-blkid_dev blkid_get_dev(blkid_cache cache, const char *devname, int flags)
-{
- blkid_dev dev = NULL, tmp;
- struct list_head *p;
-
- if (!cache || !devname)
- return NULL;
-
- list_for_each(p, &cache->bic_devs) {
- tmp = list_entry(p, struct blkid_struct_dev, bid_devs);
- if (strcmp(tmp->bid_name, devname))
- continue;
-
- DBG(DEBUG_DEVNAME,
- printf("found devname %s in cache\n", tmp->bid_name));
- dev = tmp;
- break;
- }
-
- if (!dev && (flags & BLKID_DEV_CREATE)) {
- dev = blkid_new_dev();
- if (!dev)
- return NULL;
- dev->bid_name = blkid_strdup(devname);
- dev->bid_cache = cache;
- list_add_tail(&dev->bid_devs, &cache->bic_devs);
- cache->bic_flags |= BLKID_BIC_FL_CHANGED;
- }
-
- if (flags & BLKID_DEV_VERIFY)
- dev = blkid_verify(cache, dev);
- return dev;
-}
-
-/*
- * Probe a single block device to add to the device cache.
- */
-static void probe_one(blkid_cache cache, const char *ptname,
- dev_t devno, int pri)
-{
- blkid_dev dev = NULL;
- struct list_head *p;
- const char **dir;
- char *devname = NULL;
-
- /* See if we already have this device number in the cache. */
- list_for_each(p, &cache->bic_devs) {
- blkid_dev tmp = list_entry(p, struct blkid_struct_dev,
- bid_devs);
- if (tmp->bid_devno == devno) {
- dev = blkid_verify(cache, tmp);
- break;
- }
- }
- if (dev && dev->bid_devno == devno)
- goto set_pri;
-
- /*
- * Take a quick look at /dev/ptname for the device number. We check
- * all of the likely device directories. If we don't find it, or if
- * the stat information doesn't check out, use blkid_devno_to_devname()
- * to find it via an exhaustive search for the device major/minor.
- */
- for (dir = blkid_devdirs; *dir; dir++) {
- struct stat st;
- char device[256];
-
- sprintf(device, "%s/%s", *dir, ptname);
- if ((dev = blkid_get_dev(cache, device, BLKID_DEV_FIND)) &&
- dev->bid_devno == devno)
- goto set_pri;
-
- if (stat(device, &st) == 0 && S_ISBLK(st.st_mode) &&
- st.st_rdev == devno) {
- devname = blkid_strdup(device);
- break;
- }
- }
- if (!devname) {
- devname = blkid_devno_to_devname(devno);
- if (!devname)
- return;
- }
- dev = blkid_get_dev(cache, devname, BLKID_DEV_NORMAL);
- free(devname);
-
-set_pri:
- if (!pri && !strncmp(ptname, "md", 2))
- pri = BLKID_PRI_MD;
- if (dev)
- dev->bid_pri = pri;
- return;
-}
-
-#define PROC_PARTITIONS "/proc/partitions"
-#define VG_DIR "/proc/lvm/VGs"
-
-/*
- * This function initializes the UUID cache with devices from the LVM
- * proc hierarchy. We currently depend on the names of the LVM
- * hierarchy giving us the device structure in /dev. (XXX is this a
- * safe thing to do?)
- */
-#ifdef VG_DIR
-#include <dirent.h>
-static dev_t lvm_get_devno(const char *lvm_device)
-{
- FILE *lvf;
- char buf[1024];
- int ma, mi;
- dev_t ret = 0;
-
- DBG(DEBUG_DEVNAME, printf("opening %s\n", lvm_device));
- if ((lvf = fopen(lvm_device, "r")) == NULL) {
- DBG(DEBUG_DEVNAME, printf("%s: (%d) %s\n", lvm_device, errno,
- strerror(errno)));
- return 0;
- }
-
- while (fgets(buf, sizeof(buf), lvf)) {
- if (sscanf(buf, "device: %d:%d", &ma, &mi) == 2) {
- ret = makedev(ma, mi);
- break;
- }
- }
- fclose(lvf);
-
- return ret;
-}
-
-static void lvm_probe_all(blkid_cache cache)
-{
- DIR *vg_list;
- struct dirent *vg_iter;
- int vg_len = strlen(VG_DIR);
- dev_t dev;
-
- if ((vg_list = opendir(VG_DIR)) == NULL)
- return;
-
- DBG(DEBUG_DEVNAME, printf("probing LVM devices under %s\n", VG_DIR));
-
- while ((vg_iter = readdir(vg_list)) != NULL) {
- DIR *lv_list;
- char *vdirname;
- char *vg_name;
- struct dirent *lv_iter;
-
- vg_name = vg_iter->d_name;
- if (LONE_CHAR(vg_name, '.') || !strcmp(vg_name, ".."))
- continue;
- vdirname = xmalloc(vg_len + strlen(vg_name) + 8);
- sprintf(vdirname, "%s/%s/LVs", VG_DIR, vg_name);
-
- lv_list = opendir(vdirname);
- free(vdirname);
- if (lv_list == NULL)
- continue;
-
- while ((lv_iter = readdir(lv_list)) != NULL) {
- char *lv_name, *lvm_device;
-
- lv_name = lv_iter->d_name;
- if (LONE_CHAR(lv_name, '.') || !strcmp(lv_name, ".."))
- continue;
-
- lvm_device = xmalloc(vg_len + strlen(vg_name) +
- strlen(lv_name) + 8);
- sprintf(lvm_device, "%s/%s/LVs/%s", VG_DIR, vg_name,
- lv_name);
- dev = lvm_get_devno(lvm_device);
- sprintf(lvm_device, "%s/%s", vg_name, lv_name);
- DBG(DEBUG_DEVNAME, printf("LVM dev %s: devno 0x%04X\n",
- lvm_device,
- (unsigned int) dev));
- probe_one(cache, lvm_device, dev, BLKID_PRI_LVM);
- free(lvm_device);
- }
- closedir(lv_list);
- }
- closedir(vg_list);
-}
-#endif
-
-#define PROC_EVMS_VOLUMES "/proc/evms/volumes"
-
-static int
-evms_probe_all(blkid_cache cache)
-{
- char line[100];
- int ma, mi, sz, num = 0;
- FILE *procpt;
- char device[110];
-
- procpt = fopen(PROC_EVMS_VOLUMES, "r");
- if (!procpt)
- return 0;
- while (fgets(line, sizeof(line), procpt)) {
- if (sscanf (line, " %d %d %d %*s %*s %[^\n ]",
- &ma, &mi, &sz, device) != 4)
- continue;
-
- DBG(DEBUG_DEVNAME, printf("Checking partition %s (%d, %d)\n",
- device, ma, mi));
-
- probe_one(cache, device, makedev(ma, mi), BLKID_PRI_EVMS);
- num++;
- }
- fclose(procpt);
- return num;
-}
-
-/*
- * Read the device data for all available block devices in the system.
- */
-int blkid_probe_all(blkid_cache cache)
-{
- FILE *proc;
- char line[1024];
- char ptname0[128], ptname1[128], *ptname = 0;
- char *ptnames[2];
- dev_t devs[2];
- int ma, mi;
- unsigned long long sz;
- int lens[2] = { 0, 0 };
- int which = 0, last = 0;
-
- ptnames[0] = ptname0;
- ptnames[1] = ptname1;
-
- if (!cache)
- return -BLKID_ERR_PARAM;
-
- if (cache->bic_flags & BLKID_BIC_FL_PROBED &&
- time(0) - cache->bic_time < BLKID_PROBE_INTERVAL)
- return 0;
-
- blkid_read_cache(cache);
- evms_probe_all(cache);
-#ifdef VG_DIR
- lvm_probe_all(cache);
-#endif
-
- proc = fopen(PROC_PARTITIONS, "r");
- if (!proc)
- return -BLKID_ERR_PROC;
-
- while (fgets(line, sizeof(line), proc)) {
- last = which;
- which ^= 1;
- ptname = ptnames[which];
-
- if (sscanf(line, " %d %d %llu %128[^\n ]",
- &ma, &mi, &sz, ptname) != 4)
- continue;
- devs[which] = makedev(ma, mi);
-
- DBG(DEBUG_DEVNAME, printf("read partition name %s\n", ptname));
-
- /* Skip whole disk devs unless they have no partitions
- * If we don't have a partition on this dev, also
- * check previous dev to see if it didn't have a partn.
- * heuristic: partition name ends in a digit.
- *
- * Skip extended partitions.
- * heuristic: size is 1
- *
- * FIXME: skip /dev/{ida,cciss,rd} whole-disk devs
- */
-
- lens[which] = strlen(ptname);
- if (isdigit(ptname[lens[which] - 1])) {
- DBG(DEBUG_DEVNAME,
- printf("partition dev %s, devno 0x%04X\n",
- ptname, (unsigned int) devs[which]));
-
- if (sz > 1)
- probe_one(cache, ptname, devs[which], 0);
- lens[which] = 0;
- lens[last] = 0;
- } else if (lens[last] && strncmp(ptnames[last], ptname,
- lens[last])) {
- DBG(DEBUG_DEVNAME,
- printf("whole dev %s, devno 0x%04X\n",
- ptnames[last], (unsigned int) devs[last]));
- probe_one(cache, ptnames[last], devs[last], 0);
- lens[last] = 0;
- }
- }
-
- /* Handle the last device if it wasn't partitioned */
- if (lens[which])
- probe_one(cache, ptname, devs[which], 0);
-
- fclose(proc);
-
- cache->bic_time = time(0);
- cache->bic_flags |= BLKID_BIC_FL_PROBED;
- blkid_flush_cache(cache);
- return 0;
-}
-
-#ifdef TEST_PROGRAM
-int main(int argc, char **argv)
-{
- blkid_cache cache = NULL;
- int ret;
-
- blkid_debug_mask = DEBUG_ALL;
- if (argc != 1) {
- fprintf(stderr, "Usage: %s\n"
- "Probe all devices and exit\n", argv[0]);
- exit(1);
- }
- if ((ret = blkid_get_cache(&cache, bb_dev_null)) != 0) {
- fprintf(stderr, "%s: error creating cache (%d)\n",
- argv[0], ret);
- exit(1);
- }
- if (blkid_probe_all(cache) < 0)
- printf("%s: error probing devices\n", argv[0]);
-
- blkid_put_cache(cache);
- return 0;
-}
-#endif
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