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| author | Eric Andersen | 2004-01-13 11:39:22 +0000 |
|---|---|---|
| committer | Eric Andersen | 2004-01-13 11:39:22 +0000 |
| commit | 1cda715bbcaba253ffb81463f6b9260154e7a32d (patch) | |
| tree | 9a0ba9636cfe7c96b86d89fc6b6521ea1408985e /libbb/find_root_device.c | |
| parent | 7c87b67c08b7fe379f203ecdfff6bb7d604719a5 (diff) | |
| download | busybox-1cda715bbcaba253ffb81463f6b9260154e7a32d.zip busybox-1cda715bbcaba253ffb81463f6b9260154e7a32d.tar.gz | |
Fix a bug where mount could check the wrong device. st_rdev is the correct
device ID iff the named file is a character or block special device. Otherwise
it is meaningless junk, in which case st_dev should be used. This was done
incorrectly, which could cause mount to display bogus mount info.
-Erik
Diffstat (limited to 'libbb/find_root_device.c')
| -rw-r--r-- | libbb/find_root_device.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/libbb/find_root_device.c b/libbb/find_root_device.c index c595321..836ce44 100644 --- a/libbb/find_root_device.c +++ b/libbb/find_root_device.c @@ -38,8 +38,11 @@ extern char *find_real_root_device_name(const char* name) if (stat("/", &rootStat) != 0) bb_perror_msg("could not stat '/'"); else { - if ((dev = rootStat.st_rdev)==0) - dev=rootStat.st_dev; + /* This check is here in case they pass in /dev name */ + if ((rootStat.st_mode & S_IFMT) == S_IFBLK) + dev = rootStat.st_rdev; + else + dev = rootStat.st_dev; dir = opendir("/dev"); if (!dir) |