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mountpoint-util: check /proc is mounted on failure

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This commit is contained in:
Yu Watanabe 2023-04-17 23:26:47 +09:00
parent 9a0dcf03fa
commit 4b1e461c49
1 changed files with 4 additions and 2 deletions
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6
src/basic/mountpoint-util.c
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@ -123,7 +123,7 @@ static int fd_fdinfo_mnt_id(int fd, const char *filename, int flags, int *ret_mn
r = read_full_virtual_file(path, &fdinfo, NULL);
if (r == -ENOENT) /* The fdinfo directory is a relatively new addition */
return -EOPNOTSUPP;
return proc_mounted() > 0 ? -EOPNOTSUPP : -ENOSYS;
if (r < 0)
return r;
@ -280,7 +280,7 @@ int fd_is_mount_point(int fd, const char *filename, int flags) {
fallback_fdinfo:
r = fd_fdinfo_mnt_id(fd, filename, flags, &mount_id);
if (IN_SET(r, -EOPNOTSUPP, -EACCES, -EPERM))
if (IN_SET(r, -EOPNOTSUPP, -EACCES, -EPERM, -ENOSYS))
goto fallback_fstat;
if (r < 0)
return r;
@ -549,6 +549,8 @@ int dev_is_devtmpfs(void) {
return r;
r = fopen_unlocked("/proc/self/mountinfo", "re", &proc_self_mountinfo);
if (r == -ENOENT)
return proc_mounted() > 0 ? -ENOENT : -ENOSYS;
if (r < 0)
return r;