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the code assumes that getgroups() always returns NGROUPS groups, however

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that is not true.  Instead of looping NGROUPS times, get the return value
from getgroups() and loop over the return that many times.

Noticed by: David A. Holland <dholland@eecs.harvard.edu>
This commit is contained in:
Alfred Perlstein 2000-08-23 23:36:32 +00:00
parent 03f808c55a
commit 00e64813a2
1 changed files with 4 additions and 2 deletions
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6
usr.sbin/lpr/lpc/lpc.c
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@ -334,6 +334,7 @@ ingroup(grname)
char *grname;
{
static struct group *gptr=NULL;
static int ngroups = 0;
static gid_t groups[NGROUPS];
register gid_t gid;
register int i;
@ -343,11 +344,12 @@ ingroup(grname)
warnx("warning: unknown group '%s'", grname);
return(0);
}
if (getgroups(NGROUPS, groups) < 0)
ngroups = getgroups(NGROUPS, groups);
if (ngroups < 0)
err(1, "getgroups");
}
gid = gptr->gr_gid;
for (i = 0; i < NGROUPS; i++)
for (i = 0; i < ngroups; i++)
if (gid == groups[i])
return(1);
return(0);