/* Copyright (c) 2015 Red Hat, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of version 2 the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* Written by Matus Marhefka <mmarhefk@redhat.com>
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*
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***********************************************************************
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* Creates a child process in the new specified namespace(s), child is then
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* daemonized and is running in the background. PID of the daemonized child
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* process is printed on the stdout. As the new namespace(s) is(are) maintained
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* by the daemonized child process it(they) can be removed by killing this
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* process.
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*
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*/
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#define _GNU_SOURCE
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#include <sched.h>
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#include <sys/syscall.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <string.h>
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#include <strings.h>
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#include <errno.h>
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#include "test.h"
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#include "lapi/namespaces_constants.h"
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#include "ns_common.h"
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char *TCID = "ns_create";
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void print_help(void)
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{
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int i;
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printf("usage: ns_create <%s", params[0].name);
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for (i = 1; params[i].name; i++)
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printf("|,%s", params[i].name);
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printf(">\nThe only argument is a comma separated list "
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"of namespaces to create.\nExample: ns_create net,ipc\n");
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}
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static int child_fn(void *arg LTP_ATTRIBUTE_UNUSED)
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{
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int i;
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if (setsid() == -1) {
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tst_resm(TINFO | TERRNO, "setsid");
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exit(1);
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}
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if (chdir("/") == -1) {
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tst_resm(TINFO | TERRNO, "chdir");
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exit(1);
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}
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/* close all inherrited file descriptors */
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for (i = 0; i < sysconf(_SC_OPEN_MAX); i++)
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close(i);
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pause();
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return 0;
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}
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/*
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* ./ns_create <ipc,mnt,net,pid,user,uts>
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*/
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int main(int argc, char *argv[])
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{
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int pid, flags;
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char *token;
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if (argc < 2) {
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print_help();
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return 1;
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}
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flags = 0;
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while ((token = strsep(&argv[1], ","))) {
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struct param *p = get_param(token);
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if (!p) {
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tst_resm(TINFO, "Unknown namespace: %s", token);
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print_help();
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return 1;
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}
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flags |= p->flag;
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}
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pid = ltp_clone_quick(flags | SIGCHLD, child_fn, NULL);
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if (pid == -1) {
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tst_resm(TINFO | TERRNO, "ltp_clone_quick");
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return 1;
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}
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printf("%d", pid);
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return 0;
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}
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