mirror of
https://git.proxmox.com/git/mirror_zfs.git
synced 2024-12-28 11:59:34 +03:00
8adf2e3066
getzoneid() should return GLOBAL_ZONEID instead of 0 when USER_NS is disabled. Reviewed-by: Richard Yao <richard.yao@alumni.stonybrook.edu> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Ilkka Sovanto <github@ilkka.kapsi.fi> Closes #15560
63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
/*
|
|
* CDDL HEADER START
|
|
*
|
|
* The contents of this file are subject to the terms of the
|
|
* Common Development and Distribution License (the "License").
|
|
* You may not use this file except in compliance with the License.
|
|
*
|
|
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
|
|
* or https://opensource.org/licenses/CDDL-1.0.
|
|
* See the License for the specific language governing permissions
|
|
* and limitations under the License.
|
|
*
|
|
* When distributing Covered Code, include this CDDL HEADER in each
|
|
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
|
|
* If applicable, add the following below this CDDL HEADER, with the
|
|
* fields enclosed by brackets "[]" replaced with your own identifying
|
|
* information: Portions Copyright [yyyy] [name of copyright owner]
|
|
*
|
|
* CDDL HEADER END
|
|
*/
|
|
/*
|
|
* Copyright 2006 Ricardo Correia. All rights reserved.
|
|
* Use is subject to license terms.
|
|
*/
|
|
|
|
#include <unistd.h>
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
#include <stdlib.h>
|
|
#include <limits.h>
|
|
#include <string.h>
|
|
|
|
#include <zone.h>
|
|
|
|
zoneid_t
|
|
getzoneid(void)
|
|
{
|
|
char path[PATH_MAX];
|
|
char buf[128] = { '\0' };
|
|
char *cp;
|
|
|
|
int c = snprintf(path, sizeof (path), "/proc/self/ns/user");
|
|
/* This API doesn't have any error checking... */
|
|
if (c < 0 || c >= sizeof (path))
|
|
return (GLOBAL_ZONEID);
|
|
|
|
ssize_t r = readlink(path, buf, sizeof (buf) - 1);
|
|
if (r < 0)
|
|
return (GLOBAL_ZONEID);
|
|
|
|
cp = strchr(buf, '[');
|
|
if (cp == NULL)
|
|
return (GLOBAL_ZONEID);
|
|
cp++;
|
|
|
|
unsigned long n = strtoul(cp, NULL, 10);
|
|
if (n == ULONG_MAX && errno == ERANGE)
|
|
return (GLOBAL_ZONEID);
|
|
zoneid_t z = (zoneid_t)n;
|
|
|
|
return (z);
|
|
}
|