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-rw-r--r--contrib/fuse-util/mount_util.c64
1 files changed, 64 insertions, 0 deletions
diff --git a/contrib/fuse-util/mount_util.c b/contrib/fuse-util/mount_util.c
new file mode 100644
index 00000000000..911b84445e9
--- /dev/null
+++ b/contrib/fuse-util/mount_util.c
@@ -0,0 +1,64 @@
+/*
+ FUSE: Filesystem in Userspace
+ Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu>
+
+ This program can be distributed under the terms of the GNU LGPLv2.
+ See the file COPYING.LIB.
+*/
+
+#include <dirent.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+int fuse_mnt_check_empty(const char *progname, const char *mnt,
+ mode_t rootmode, off_t rootsize)
+{
+ int isempty = 1;
+
+ if (S_ISDIR(rootmode)) {
+ struct dirent *ent;
+ DIR *dp = opendir(mnt);
+ if (dp == NULL) {
+ fprintf(stderr,
+ "%s: failed to open mountpoint for reading: %s\n",
+ progname, strerror(errno));
+ return -1;
+ }
+ while ((ent = readdir(dp)) != NULL) {
+ if (strcmp(ent->d_name, ".") != 0 &&
+ strcmp(ent->d_name, "..") != 0) {
+ isempty = 0;
+ break;
+ }
+ }
+ closedir(dp);
+ } else if (rootsize)
+ isempty = 0;
+
+ if (!isempty) {
+ fprintf(stderr, "%s: mountpoint is not empty\n", progname);
+ fprintf(stderr, "%s: if you are sure this is safe, use the 'nonempty' mount option\n", progname);
+ return -1;
+ }
+ return 0;
+}
+
+int fuse_mnt_check_fuseblk(void)
+{
+ char buf[256];
+ FILE *f = fopen("/proc/filesystems", "r");
+ if (!f)
+ return 1;
+
+ while (fgets(buf, sizeof(buf), f))
+ if (strstr(buf, "fuseblk\n")) {
+ fclose(f);
+ return 1;
+ }
+
+ fclose(f);
+ return 0;
+}