104 lines
2.3 KiB
C
Executable File
104 lines
2.3 KiB
C
Executable File
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
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/* All Rights Reserved */
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/* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T */
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/* The copyright notice above does not evidence any */
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/* actual or intended publication of such source code. */
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#ident "@(#)groups.c 1.3 95/10/04 SMI" /* from SVr4.0 1.78 */
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/sysmacros.h>
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#include <sys/systm.h>
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#include <sys/cred.h>
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#include <sys/errno.h>
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#include <sys/proc.h>
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#include <sys/debug.h>
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#include <sys/kmem.h>
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/* ARGSUSED */
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int
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setgroups(u_int gidsetsize, gid_t *gidset)
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{
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register proc_t *p;
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register cred_t *cr, *newcr;
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register u_short i;
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register u_short n = gidsetsize;
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gid_t *groups = NULL;
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if (n != 0 && n <= (u_short)ngroups_max) {
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groups = (gid_t *)kmem_alloc(n * sizeof (gid_t), KM_SLEEP);
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if (copyin((caddr_t)gidset, (caddr_t)groups,
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n * sizeof (gid_t)) != 0) {
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kmem_free((void *)groups, n * sizeof (gid_t));
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return (set_errno(EFAULT));
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}
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}
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p = ttoproc(curthread);
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mutex_enter(&p->p_crlock);
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cr = p->p_cred;
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if (!suser(cr)) {
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mutex_exit(&p->p_crlock);
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if (groups != NULL)
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kmem_free((void *)groups, n * sizeof (gid_t));
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return (set_errno(EPERM));
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}
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if (n > (u_short)ngroups_max) {
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if (groups != NULL)
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kmem_free((void *)groups, n * sizeof (gid_t));
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mutex_exit(&p->p_crlock);
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return (set_errno(EINVAL));
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}
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newcr = crdup(cr);
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if (n != 0) {
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bcopy((caddr_t) groups, (caddr_t)newcr->cr_groups,
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n * sizeof (gid_t));
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kmem_free((void *)groups, n * sizeof (gid_t));
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}
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for (i = 0; i < n; i++) {
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if (newcr->cr_groups[i] < 0 || newcr->cr_groups[i] >= MAXUID) {
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mutex_exit(&p->p_crlock);
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crfree(newcr);
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return (set_errno(EINVAL));
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}
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}
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newcr->cr_ngroups = n;
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p->p_cred = newcr;
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crhold(newcr); /* hold for the current thread */
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crfree(cr); /* free the old one */
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mutex_exit(&p->p_crlock);
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/*
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* Broadcast new cred to process threads (including the current one).
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*/
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crset(p, newcr);
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return (0);
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}
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int
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getgroups(int gidsetsize, gid_t *gidset)
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{
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register struct cred *cr;
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register gid_t n;
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cr = curthread->t_cred;
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n = cr->cr_ngroups;
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if (gidsetsize != 0) {
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if ((gid_t)gidsetsize < n)
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return (set_errno(EINVAL));
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if (copyout((caddr_t)cr->cr_groups, (caddr_t)gidset,
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n * sizeof (gid_t)))
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return (set_errno(EFAULT));
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}
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return (n);
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}
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