ahp/busybox
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

mkfs_vfat: do not generate same volume_id when run in rapid succession

Browse source 
function                                             old     new   delta
mkfs_vfat_main                                      1502    1523     +21

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2023-04-10 14:46:09 +02:00
parent 9bc2b6e884
commit 611729eff3
1 changed files with 3 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

5
util-linux/mkfs_vfat.c
View file

@ -267,8 +267,9 @@ int mkfs_vfat_main(int argc UNUSED_PARAM, char **argv)
// cache device name
device_name = argv[0];
// default volume ID = creation time
volume_id = time(NULL);
// default volume ID: somewhat random (not crypto-strong)
// (mix in pid to avoid same IDs when run in rapid succession)
volume_id = time(NULL) ^ getpid();
// truncate to exactly 11 chars, pad with spaces
sprintf(volume_label11, "%-11.11s", arg_volume_label);