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sizeof(foo - 1) isn't the same as sizeof(foo) - 1.

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Pointed out by: Theo De Raadt.
This commit is contained in:
Warner Losh 1998-06-09 14:51:05 +00:00
parent 4d40ec2fb9
commit 5dbf068b1e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=36815
1 changed files with 3 additions and 3 deletions
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6
usr.bin/tip/tip/tip.c
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@ -42,7 +42,7 @@ static const char copyright[] =
static char sccsid[] = "@(#)tip.c 8.1 (Berkeley) 6/6/93";
#endif
static const char rcsid[] =
"$Id: tip.c,v 1.7 1997/09/18 14:07:17 phk Exp $";
"$Id: tip.c,v 1.8 1998/06/09 04:28:05 imp Exp $";
#endif /* not lint */
/*
@ -153,9 +153,9 @@ main(argc, argv)
* Copy the number then stomp on the original (in case the number
* is private, we don't want 'ps' or 'w' to find it).
*/
if (strlen(system) > sizeof(PNbuf - 1))
if (strlen(system) > sizeof(PNbuf) - 1)
errx(1, "phone number too long (max = %d bytes)", sizeof PNbuf - 1);
strncpy(PNbuf, system, sizeof(PNbuf - 1));
strncpy(PNbuf, system, sizeof(PNbuf) - 1);
for (p = system; *p; p++)
*p = '\0';
PN = PNbuf;