freebsd-skq/sbin/ifconfig/ifgroup.c
pfg 7551d83c35 various: general adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

No functional change intended.
2017-11-27 15:37:16 +00:00

186 lines
5.0 KiB
C

/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2006 Max Laier. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <net/if.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "ifconfig.h"
/* ARGSUSED */
static void
setifgroup(const char *group_name, int d, int s, const struct afswtch *rafp)
{
struct ifgroupreq ifgr;
memset(&ifgr, 0, sizeof(ifgr));
strlcpy(ifgr.ifgr_name, name, IFNAMSIZ);
if (group_name[0] && isdigit(group_name[strlen(group_name) - 1]))
errx(1, "setifgroup: group names may not end in a digit");
if (strlcpy(ifgr.ifgr_group, group_name, IFNAMSIZ) >= IFNAMSIZ)
errx(1, "setifgroup: group name too long");
if (ioctl(s, SIOCAIFGROUP, (caddr_t)&ifgr) == -1 && errno != EEXIST)
err(1," SIOCAIFGROUP");
}
/* ARGSUSED */
static void
unsetifgroup(const char *group_name, int d, int s, const struct afswtch *rafp)
{
struct ifgroupreq ifgr;
memset(&ifgr, 0, sizeof(ifgr));
strlcpy(ifgr.ifgr_name, name, IFNAMSIZ);
if (group_name[0] && isdigit(group_name[strlen(group_name) - 1]))
errx(1, "unsetifgroup: group names may not end in a digit");
if (strlcpy(ifgr.ifgr_group, group_name, IFNAMSIZ) >= IFNAMSIZ)
errx(1, "unsetifgroup: group name too long");
if (ioctl(s, SIOCDIFGROUP, (caddr_t)&ifgr) == -1 && errno != ENOENT)
err(1, "SIOCDIFGROUP");
}
static void
getifgroups(int s)
{
int len, cnt;
struct ifgroupreq ifgr;
struct ifg_req *ifg;
memset(&ifgr, 0, sizeof(ifgr));
strlcpy(ifgr.ifgr_name, name, IFNAMSIZ);
if (ioctl(s, SIOCGIFGROUP, (caddr_t)&ifgr) == -1) {
if (errno == EINVAL || errno == ENOTTY)
return;
else
err(1, "SIOCGIFGROUP");
}
len = ifgr.ifgr_len;
ifgr.ifgr_groups =
(struct ifg_req *)calloc(len / sizeof(struct ifg_req),
sizeof(struct ifg_req));
if (ifgr.ifgr_groups == NULL)
err(1, "getifgroups");
if (ioctl(s, SIOCGIFGROUP, (caddr_t)&ifgr) == -1)
err(1, "SIOCGIFGROUP");
cnt = 0;
ifg = ifgr.ifgr_groups;
for (; ifg && len >= sizeof(struct ifg_req); ifg++) {
len -= sizeof(struct ifg_req);
if (strcmp(ifg->ifgrq_group, "all")) {
if (cnt == 0)
printf("\tgroups: ");
cnt++;
printf("%s ", ifg->ifgrq_group);
}
}
if (cnt)
printf("\n");
free(ifgr.ifgr_groups);
}
static void
printgroup(const char *groupname)
{
struct ifgroupreq ifgr;
struct ifg_req *ifg;
int len, cnt = 0;
int s;
s = socket(AF_LOCAL, SOCK_DGRAM, 0);
if (s == -1)
err(1, "socket(AF_LOCAL,SOCK_DGRAM)");
bzero(&ifgr, sizeof(ifgr));
strlcpy(ifgr.ifgr_name, groupname, sizeof(ifgr.ifgr_name));
if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1) {
if (errno == EINVAL || errno == ENOTTY ||
errno == ENOENT)
exit(0);
else
err(1, "SIOCGIFGMEMB");
}
len = ifgr.ifgr_len;
if ((ifgr.ifgr_groups = calloc(1, len)) == NULL)
err(1, "printgroup");
if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1)
err(1, "SIOCGIFGMEMB");
for (ifg = ifgr.ifgr_groups; ifg && len >= sizeof(struct ifg_req);
ifg++) {
len -= sizeof(struct ifg_req);
printf("%s\n", ifg->ifgrq_member);
cnt++;
}
free(ifgr.ifgr_groups);
exit(0);
}
static struct cmd group_cmds[] = {
DEF_CMD_ARG("group", setifgroup),
DEF_CMD_ARG("-group", unsetifgroup),
};
static struct afswtch af_group = {
.af_name = "af_group",
.af_af = AF_UNSPEC,
.af_other_status = getifgroups,
};
static struct option group_gopt = { "g:", "[-g groupname]", printgroup };
static __constructor void
group_ctor(void)
{
int i;
for (i = 0; i < nitems(group_cmds); i++)
cmd_register(&group_cmds[i]);
af_register(&af_group);
opt_register(&group_gopt);
}