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dm ioctl: prefer strlcpy over strncpy 

strlcpy() will always null terminate the string.

    The code should already guarantee this as the last bytes are already
    NULs and the string lengths were restricted before being stored in
    hc.  Removing the '-1' becomes necessary so strlcpy() doesn't
    lose the last character of a maximum-length string.
	- agk

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
This commit is contained in:
Roel Kluin 2009-12-10 23:52:07 +00:00 committed by Alasdair G Kergon
parent 5339fc2d47
commit a518b86d0b
1 changed files with 2 additions and 2 deletions
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4
drivers/md/dm-ioctl.c
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@ -645,9 +645,9 @@ static struct mapped_device *find_device(struct dm_ioctl *param)
* Sneakily write in both the name and the uuid
* while we have the cell.
*/
strncpy(param->name, hc->name, sizeof(param->name));
strlcpy(param->name, hc->name, sizeof(param->name));
if (hc->uuid)
strncpy(param->uuid, hc->uuid, sizeof(param->uuid)-1);
strlcpy(param->uuid, hc->uuid, sizeof(param->uuid));
else
param->uuid[0] = '\0';