[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/app/e2fsprogs/e2fsprogs-1.42.9/misc/ismounted.c b/ap/app/e2fsprogs/e2fsprogs-1.42.9/misc/ismounted.c
new file mode 100644
index 0000000..6aa0e04
--- /dev/null
+++ b/ap/app/e2fsprogs/e2fsprogs-1.42.9/misc/ismounted.c
@@ -0,0 +1,218 @@
+/*
+ * ismounted.c --- Check to see if the filesystem was mounted
+ *
+ * Copyright (C) 1995,1996,1997,1998,1999,2000,2008 Theodore Ts'o.
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Public
+ * License.
+ * %End-Header%
+ */
+
+#include "config.h"
+#include <stdio.h>
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#if HAVE_ERRNO_H
+#include <errno.h>
+#endif
+#include <fcntl.h>
+#ifdef HAVE_LINUX_FD_H
+#include <linux/fd.h>
+#endif
+#ifdef HAVE_MNTENT_H
+#include <mntent.h>
+#endif
+#include <string.h>
+#include <sys/stat.h>
+#include <ctype.h>
+
+#include "fsck.h"
+
+/*
+ * ext2fs_check_if_mounted flags
+ */
+#define MF_MOUNTED 1
+
+#include "et/com_err.h"
+
+#ifdef HAVE_SETMNTENT
+static char *skip_over_blank(char *cp)
+{
+ while (*cp && isspace(*cp))
+ cp++;
+ return cp;
+}
+
+static char *skip_over_word(char *cp)
+{
+ while (*cp && !isspace(*cp))
+ cp++;
+ return cp;
+}
+
+static char *parse_word(char **buf)
+{
+ char *word, *next;
+
+ word = *buf;
+ if (*word == 0)
+ return 0;
+
+ word = skip_over_blank(word);
+ next = skip_over_word(word);
+ if (*next)
+ *next++ = 0;
+ *buf = next;
+ return word;
+}
+#endif
+
+/*
+ * 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 errcode_t check_mntent_file(const char *mtab_file, const char *file,
+ int *mount_flags)
+{
+#ifdef HAVE_SETMNTENT
+ struct stat st_buf;
+ errcode_t retval = 0;
+ dev_t file_dev=0, file_rdev=0;
+ ino_t file_ino=0;
+ FILE *f;
+ char buf[1024], *device = 0, *mnt_dir = 0, *cp;
+
+ *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 (1) {
+ if (!fgets(buf, sizeof(buf), f)) {
+ device = mnt_dir = 0;
+ break;
+ }
+ buf[sizeof(buf)-1] = 0;
+
+ cp = buf;
+ device = parse_word(&cp);
+ if (!device || *device == '#')
+ return 0; /* Ignore blank lines and comments */
+ mnt_dir = parse_word(&cp);
+
+ if (device[0] != '/')
+ continue;
+
+ if (strcmp(file, device) == 0)
+ break;
+ if (stat(device, &st_buf) == 0) {
+ if (S_ISBLK(st_buf.st_mode)) {
+#ifndef __GNU__
+ if (file_rdev && (file_rdev == st_buf.st_rdev))
+ break;
+#endif /* __GNU__ */
+ } else {
+ if (file_dev && ((file_dev == st_buf.st_dev) &&
+ (file_ino == st_buf.st_ino)))
+ break;
+ }
+ }
+ }
+
+ if (mnt_dir == 0) {
+#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;
+#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_dir, &st_buf) < 0) {
+ retval = errno;
+ if (retval == ENOENT) {
+#ifdef DEBUG
+ printf("Bogus entry in %s! (%s does not exist)\n",
+ mtab_file, 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_dir);
+#endif /* DEBUG */
+ goto errout;
+ }
+#endif /* __GNU__ */
+ *mount_flags = MF_MOUNTED;
+
+ retval = 0;
+errout:
+ endmntent (f);
+ return retval;
+#else /* !HAVE_SETMNTENT */
+ return 0;
+#endif /* HAVE_MNTENT_H */
+}
+
+int is_mounted(const char *file)
+{
+ errcode_t retval;
+ int mount_flags = 0;
+
+#ifdef __linux__
+ retval = check_mntent_file("/proc/mounts", file, &mount_flags);
+ if (retval)
+ return 0;
+ if (mount_flags)
+ return 1;
+#endif /* __linux__ */
+ retval = check_mntent_file("/etc/mtab", file, &mount_flags);
+ if (retval)
+ return 0;
+ return (mount_flags);
+}
+
+#ifdef DEBUG
+int main(int argc, char **argv)
+{
+ if (argc < 2) {
+ fprintf(stderr, "Usage: %s device\n", argv[0]);
+ exit(1);
+ }
+
+ if (is_mounted(argv[1]))
+ printf("\t%s is mounted.\n", argv[1]);
+ exit(0);
+}
+#endif /* DEBUG */