From 7b4c7a681cc4c0a53dc8a8baf4853e921cfbf5de Mon Sep 17 00:00:00 2001 From: bigbiff Date: Thu, 1 Jan 2015 19:44:14 -0500 Subject: Update blkid to 2.25.0 Break libblkid into 4 libraries: libblkid, libuuid, libutil-linux and libfdisk. This should help in later patch updates. Change-Id: I680d9a7feb031e5c29a603e9c58aff4b65826262 --- libblkid/ismounted.c | 387 --------------------------------------------------- 1 file changed, 387 deletions(-) delete mode 100644 libblkid/ismounted.c (limited to 'libblkid/ismounted.c') diff --git a/libblkid/ismounted.c b/libblkid/ismounted.c deleted file mode 100644 index d9f1f57d0..000000000 --- a/libblkid/ismounted.c +++ /dev/null @@ -1,387 +0,0 @@ -/* - * ismounted.c --- Check to see if the filesystem was mounted - * - * Copyright (C) 1995,1996,1997,1998,1999,2000,2008 Theodore Ts'o. - * - * This file may be redistributed under the terms of the GNU Public - * License. - */ -#include -#include -#include -#include -#include -#ifdef HAVE_MNTENT_H -#include -#endif -#include -#include -#include -#include -#ifdef __APPLE__ -#include -#include -#endif - -#include "pathnames.h" -#include "ismounted.h" -#include "c.h" -#ifdef __linux__ -# include "loopdev.h" -#endif - - - -#ifdef HAVE_MNTENT_H -/* - * Helper function which checks a file in /etc/mtab format to see if a - * filesystem is mounted. Returns an error if the file doesn't exist - * or can't be opened. - */ -static int check_mntent_file(const char *mtab_file, const char *file, - int *mount_flags, char *mtpt, int mtlen) -{ - struct mntent *mnt; - struct stat st_buf; - int retval = 0; - dev_t file_dev=0, file_rdev=0; - ino_t file_ino=0; - FILE *f; - int fd; - - *mount_flags = 0; - if ((f = setmntent (mtab_file, "r")) == NULL) - return errno; - - if (stat(file, &st_buf) == 0) { - if (S_ISBLK(st_buf.st_mode)) { -#ifndef __GNU__ /* The GNU hurd is broken with respect to stat devices */ - file_rdev = st_buf.st_rdev; -#endif /* __GNU__ */ - } else { - file_dev = st_buf.st_dev; - file_ino = st_buf.st_ino; - } - } - - while ((mnt = getmntent (f)) != NULL) { - if (mnt->mnt_fsname[0] != '/') - continue; - if (strcmp(file, mnt->mnt_fsname) == 0) - break; - if (stat(mnt->mnt_fsname, &st_buf) != 0) - continue; - - if (S_ISBLK(st_buf.st_mode)) { -#ifndef __GNU__ - if (file_rdev && file_rdev == st_buf.st_rdev) - break; -#ifdef __linux__ - /* maybe the file is loopdev backing file */ - if (file_dev - && major(st_buf.st_rdev) == LOOPDEV_MAJOR - && loopdev_is_used(mnt->mnt_fsname, file, 0, 0)) - break; -#endif /* __linux__ */ -#endif /* __GNU__ */ - } else { - if (file_dev && ((file_dev == st_buf.st_dev) && - (file_ino == st_buf.st_ino))) - break; - } - } - - if (mnt == NULL) { -#ifndef __GNU__ /* The GNU hurd is broken with respect to stat devices */ - /* - * Do an extra check to see if this is the root device. We - * can't trust /etc/mtab, and /proc/mounts will only list - * /dev/root for the root filesystem. Argh. Instead we - * check if the given device has the same major/minor number - * as the device that the root directory is on. - */ - if (file_rdev && stat("/", &st_buf) == 0 && - st_buf.st_dev == file_rdev) { - *mount_flags = MF_MOUNTED; - if (mtpt) - strncpy(mtpt, "/", mtlen); - goto is_root; - } -#endif /* __GNU__ */ - goto errout; - } -#ifndef __GNU__ /* The GNU hurd is deficient; what else is new? */ - /* Validate the entry in case /etc/mtab is out of date */ - /* - * We need to be paranoid, because some broken distributions - * (read: Slackware) don't initialize /etc/mtab before checking - * all of the non-root filesystems on the disk. - */ - if (stat(mnt->mnt_dir, &st_buf) < 0) { - retval = errno; - if (retval == ENOENT) { -#ifdef DEBUG - printf("Bogus entry in %s! (%s does not exist)\n", - mtab_file, mnt->mnt_dir); -#endif /* DEBUG */ - retval = 0; - } - goto errout; - } - if (file_rdev && (st_buf.st_dev != file_rdev)) { -#ifdef DEBUG - printf("Bogus entry in %s! (%s not mounted on %s)\n", - mtab_file, file, mnt->mnt_dir); -#endif /* DEBUG */ - goto errout; - } -#endif /* __GNU__ */ - *mount_flags = MF_MOUNTED; - -#ifdef MNTOPT_RO - /* Check to see if the ro option is set */ - if (hasmntopt(mnt, MNTOPT_RO)) - *mount_flags |= MF_READONLY; -#endif - - if (mtpt) - strncpy(mtpt, mnt->mnt_dir, mtlen); - /* - * Check to see if we're referring to the root filesystem. - * If so, do a manual check to see if we can open /etc/mtab - * read/write, since if the root is mounted read/only, the - * contents of /etc/mtab may not be accurate. - */ - if (!strcmp(mnt->mnt_dir, "/")) { -is_root: -#define TEST_FILE "/.ismount-test-file" - *mount_flags |= MF_ISROOT; - fd = open(TEST_FILE, O_RDWR|O_CREAT, 0600); - if (fd < 0) { - if (errno == EROFS) - *mount_flags |= MF_READONLY; - } else - close(fd); - (void) unlink(TEST_FILE); - } - retval = 0; -errout: - endmntent (f); - return retval; -} - -static int check_mntent(const char *file, int *mount_flags, - char *mtpt, int mtlen) -{ - int retval; - -#ifdef DEBUG - retval = check_mntent_file("/tmp/mtab", file, mount_flags, - mtpt, mtlen); - if (retval == 0) - return 0; -#endif /* DEBUG */ -#ifdef __linux__ - retval = check_mntent_file("/proc/mounts", file, mount_flags, - mtpt, mtlen); - if (retval == 0 && (*mount_flags != 0)) - return 0; - if (access("/proc/mounts", R_OK) == 0) { - *mount_flags = 0; - return retval; - } -#endif /* __linux__ */ -#if defined(MOUNTED) || defined(_PATH_MOUNTED) -#ifndef MOUNTED -#define MOUNTED _PATH_MOUNTED -#endif /* MOUNTED */ - retval = check_mntent_file(MOUNTED, file, mount_flags, mtpt, mtlen); - return retval; -#else - *mount_flags = 0; - return 0; -#endif /* defined(MOUNTED) || defined(_PATH_MOUNTED) */ -} - -#else -#if defined(HAVE_GETMNTINFO) - -static int check_getmntinfo(const char *file, int *mount_flags, - char *mtpt, int mtlen) -{ - struct statfs *mp; - int len, n; - const char *s1; - char *s2; - - n = getmntinfo(&mp, MNT_NOWAIT); - if (n == 0) - return errno; - - len = sizeof(_PATH_DEV) - 1; - s1 = file; - if (strncmp(_PATH_DEV, s1, len) == 0) - s1 += len; - - *mount_flags = 0; - while (--n >= 0) { - s2 = mp->f_mntfromname; - if (strncmp(_PATH_DEV, s2, len) == 0) { - s2 += len - 1; - *s2 = 'r'; - } - if (strcmp(s1, s2) == 0 || strcmp(s1, &s2[1]) == 0) { - *mount_flags = MF_MOUNTED; - break; - } - ++mp; - } - if (mtpt) - strncpy(mtpt, mp->f_mntonname, mtlen); - return 0; -} -#endif /* HAVE_GETMNTINFO */ -#endif /* HAVE_MNTENT_H */ - -/* - * Check to see if we're dealing with the swap device. - */ -static int is_swap_device(const char *file) -{ - FILE *f; - char buf[1024], *cp; - dev_t file_dev; - struct stat st_buf; - int ret = 0; - - file_dev = 0; -#ifndef __GNU__ /* The GNU hurd is broken with respect to stat devices */ - if ((stat(file, &st_buf) == 0) && - S_ISBLK(st_buf.st_mode)) - file_dev = st_buf.st_rdev; -#endif /* __GNU__ */ - - if (!(f = fopen("/proc/swaps", "r"))) - return 0; - /* Skip the first line */ - if (!fgets(buf, sizeof(buf), f)) - goto leave; - if (*buf && strncmp(buf, "Filename\t", 9)) - /* Linux <=2.6.19 contained a bug in the /proc/swaps - * code where the header would not be displayed - */ - goto valid_first_line; - - while (fgets(buf, sizeof(buf), f)) { -valid_first_line: - if ((cp = strchr(buf, ' ')) != NULL) - *cp = 0; - if ((cp = strchr(buf, '\t')) != NULL) - *cp = 0; - if (strcmp(buf, file) == 0) { - ret++; - break; - } -#ifndef __GNU__ - if (file_dev && (stat(buf, &st_buf) == 0) && - S_ISBLK(st_buf.st_mode) && - file_dev == st_buf.st_rdev) { - ret++; - break; - } -#endif /* __GNU__ */ - } - -leave: - fclose(f); - return ret; -} - - -/* - * check_mount_point() fills determines if the device is mounted or otherwise - * busy, and fills in mount_flags with one or more of the following flags: - * MF_MOUNTED, MF_ISROOT, MF_READONLY, MF_SWAP, and MF_BUSY. If mtpt is - * non-NULL, the directory where the device is mounted is copied to where mtpt - * is pointing, up to mtlen characters. - */ -#ifdef __TURBOC__ - #pragma argsused -#endif -int check_mount_point(const char *device, int *mount_flags, - char *mtpt, int mtlen) -{ - struct stat st_buf; - int retval = 0; - int fd; - - if (is_swap_device(device)) { - *mount_flags = MF_MOUNTED | MF_SWAP; - strncpy(mtpt, "", mtlen); - } else { -#ifdef HAVE_MNTENT_H - retval = check_mntent(device, mount_flags, mtpt, mtlen); -#else -#ifdef HAVE_GETMNTINFO - retval = check_getmntinfo(device, mount_flags, mtpt, mtlen); -#else -#ifdef __GNUC__ - #warning "Can't use getmntent or getmntinfo to check for mounted filesystems!" -#endif - *mount_flags = 0; -#endif /* HAVE_GETMNTINFO */ -#endif /* HAVE_MNTENT_H */ - } - if (retval) - return retval; - -#ifdef __linux__ /* This only works on Linux 2.6+ systems */ - if ((stat(device, &st_buf) != 0) || - !S_ISBLK(st_buf.st_mode)) - return 0; - fd = open(device, O_RDONLY | O_EXCL); - if (fd < 0) { - if (errno == EBUSY) - *mount_flags |= MF_BUSY; - } else - close(fd); -#endif - - return 0; -} - -int is_mounted(const char *file) -{ - int retval; - int mount_flags = 0; - - retval = check_mount_point(file, &mount_flags, NULL, 0); - if (retval) - return 0; - return mount_flags & MF_MOUNTED; -} - -#ifdef TEST_PROGRAM -int main(int argc, char **argv) -{ - int flags = 0; - char devname[PATH_MAX]; - - if (argc < 2) { - fprintf(stderr, "Usage: %s device\n", argv[0]); - return EXIT_FAILURE; - } - - if (check_mount_point(argv[1], &flags, devname, sizeof(devname)) == 0 && - (flags & MF_MOUNTED)) { - if (flags & MF_SWAP) - printf("used swap device\n"); - else - printf("mounted on %s\n", devname); - return EXIT_SUCCESS; - } - - printf("not mounted\n"); - return EXIT_FAILURE; -} -#endif /* DEBUG */ -- cgit v1.2.3