mirror of
https://github.com/openwrt/openwrt.git
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56 lines
1.2 KiB
Diff
56 lines
1.2 KiB
Diff
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--- a/lib/sysfs_utils.c
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+++ b/lib/sysfs_utils.c
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@@ -22,6 +22,7 @@
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*/
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#include "libsysfs.h"
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#include "sysfs.h"
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+#include <mntent.h>
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/**
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* sysfs_remove_trailing_slash: Removes any trailing '/' in the given path
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@@ -53,6 +54,9 @@ int sysfs_get_mnt_path(char *mnt_path, s
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{
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static char sysfs_path[SYSFS_PATH_MAX] = "";
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const char *sysfs_path_env;
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+ FILE *mnt;
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+ struct mntent *mntent;
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+ int ret;
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if (len == 0 || mnt_path == NULL)
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return -1;
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@@ -64,12 +68,31 @@ int sysfs_get_mnt_path(char *mnt_path, s
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if (sysfs_path_env != NULL) {
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safestrcpymax(mnt_path, sysfs_path_env, len);
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sysfs_remove_trailing_slash(mnt_path);
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- return 0;
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+ } else {
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+ safestrcpymax(mnt_path, SYSFS_MNT_PATH, len);
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}
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- safestrcpymax(mnt_path, SYSFS_MNT_PATH, len);
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}
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- return 0;
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+ /* check that mount point is indeed mounted */
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+ ret = -1;
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+ if ((mnt = setmntent(SYSFS_PROC_MNTS, "r")) == NULL) {
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+ dprintf("Error getting mount information\n");
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+ return -1;
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+ }
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+ while ((mntent = getmntent(mnt)) != NULL) {
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+ if (strcmp(mntent->mnt_type, SYSFS_FSTYPE_NAME) == 0 &&
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+ strcmp(mntent->mnt_dir, mnt_path) == 0) {
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+ ret = 0;
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+ break;
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+ }
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+ }
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+
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+ endmntent(mnt);
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+
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+ if (ret < 0)
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+ errno = ENOENT;
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+
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+ return ret;
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}
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/**
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