| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | --- a/lib/sysfs_utils.c |
| 2 | +++ b/lib/sysfs_utils.c |
| 3 | @@ -22,6 +22,7 @@ |
| 4 | */ |
| 5 | #include "libsysfs.h" |
| 6 | #include "sysfs.h" |
| 7 | +#include <mntent.h> |
| 8 | |
| 9 | /** |
| 10 | * sysfs_remove_trailing_slash: Removes any trailing '/' in the given path |
| 11 | @@ -53,6 +54,9 @@ int sysfs_get_mnt_path(char *mnt_path, s |
| 12 | { |
| 13 | static char sysfs_path[SYSFS_PATH_MAX] = ""; |
| 14 | const char *sysfs_path_env; |
| 15 | + FILE *mnt; |
| 16 | + struct mntent *mntent; |
| 17 | + int ret; |
| 18 | |
| 19 | if (len == 0 || mnt_path == NULL) |
| 20 | return -1; |
| 21 | @@ -64,12 +68,31 @@ int sysfs_get_mnt_path(char *mnt_path, s |
| 22 | if (sysfs_path_env != NULL) { |
| 23 | safestrcpymax(mnt_path, sysfs_path_env, len); |
| 24 | sysfs_remove_trailing_slash(mnt_path); |
| 25 | - return 0; |
| 26 | + } else { |
| 27 | + safestrcpymax(mnt_path, SYSFS_MNT_PATH, len); |
| 28 | } |
| 29 | - safestrcpymax(mnt_path, SYSFS_MNT_PATH, len); |
| 30 | } |
| 31 | |
| 32 | - return 0; |
| 33 | + /* check that mount point is indeed mounted */ |
| 34 | + ret = -1; |
| 35 | + if ((mnt = setmntent(SYSFS_PROC_MNTS, "r")) == NULL) { |
| 36 | + dprintf("Error getting mount information\n"); |
| 37 | + return -1; |
| 38 | + } |
| 39 | + while ((mntent = getmntent(mnt)) != NULL) { |
| 40 | + if (strcmp(mntent->mnt_type, SYSFS_FSTYPE_NAME) == 0 && |
| 41 | + strcmp(mntent->mnt_dir, mnt_path) == 0) { |
| 42 | + ret = 0; |
| 43 | + break; |
| 44 | + } |
| 45 | + } |
| 46 | + |
| 47 | + endmntent(mnt); |
| 48 | + |
| 49 | + if (ret < 0) |
| 50 | + errno = ENOENT; |
| 51 | + |
| 52 | + return ret; |
| 53 | } |
| 54 | |
| 55 | /** |