143 lines
3.3 KiB
C
143 lines
3.3 KiB
C
/*
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* Copyright (c) International Business Machines Corp., 2007
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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 the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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
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* the GNU General Public License for more details.
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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, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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***************************************************************************/
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#include "libclone.h"
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int do_clone_tests(unsigned long clone_flags,
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int (*fn1) (void *arg), void *arg1,
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int (*fn2) (void *arg), void *arg2)
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{
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int ret;
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ret = ltp_clone_quick(clone_flags | SIGCHLD, fn1, arg1);
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if (ret == -1) {
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return -1;
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}
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if (fn2)
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ret = fn2(arg2);
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else
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ret = 0;
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return ret;
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}
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int do_unshare_tests(unsigned long clone_flags,
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int (*fn1) (void *arg), void *arg1,
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int (*fn2) (void *arg), void *arg2)
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{
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int pid, ret = 0;
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int retpipe[2];
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char buf[2];
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if (pipe(retpipe) == -1) {
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perror("pipe");
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return -1;
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}
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pid = fork();
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if (pid == -1) {
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perror("fork");
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close(retpipe[0]);
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close(retpipe[1]);
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return -1;
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}
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if (pid == 0) {
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close(retpipe[0]);
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ret = ltp_syscall(SYS_unshare, clone_flags);
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if (ret == -1) {
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if (write(retpipe[1], "0", 2) < 0) {
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perror("unshare:write(retpipe[1], ..)");
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}
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close(retpipe[1]);
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exit(1);
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} else {
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if (write(retpipe[1], "1", 2) < 0) {
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perror("unshare:write(retpipe[1], ..)");
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}
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}
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close(retpipe[1]);
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ret = fn1(arg1);
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exit(ret);
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} else {
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close(retpipe[1]);
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if (read(retpipe[0], &buf, 2) < 0) {
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perror("unshare:read(retpipe[0], ..)");
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}
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close(retpipe[0]);
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if (*buf == '0')
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return -1;
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if (fn2)
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ret = fn2(arg2);
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}
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return ret;
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}
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int do_plain_tests(int (*fn1) (void *arg), void *arg1,
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int (*fn2) (void *arg), void *arg2)
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{
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int ret = 0, pid;
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pid = fork();
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if (pid == -1) {
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perror("fork");
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return -1;
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}
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if (pid == 0)
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exit(fn1(arg1));
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if (fn2)
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ret = fn2(arg2);
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return ret;
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}
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int do_clone_unshare_test(int use_clone, unsigned long clone_flags,
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int (*fn1) (void *arg), void *arg1)
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{
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switch (use_clone) {
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case T_NONE:
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return do_plain_tests(fn1, arg1, NULL, NULL);
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case T_CLONE:
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return do_clone_tests(clone_flags, fn1, arg1, NULL, NULL);
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case T_UNSHARE:
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return do_unshare_tests(clone_flags, fn1, arg1, NULL, NULL);
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default:
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printf("%s: bad use_clone option: %d\n", __FUNCTION__,
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use_clone);
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return -1;
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}
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}
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/*
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* Run fn1 in a unshared environmnent, and fn2 in the original context
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*/
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int do_clone_unshare_tests(int use_clone, unsigned long clone_flags,
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int (*fn1) (void *arg), void *arg1,
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int (*fn2) (void *arg), void *arg2)
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{
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switch (use_clone) {
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case T_NONE:
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return do_plain_tests(fn1, arg1, fn2, arg2);
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case T_CLONE:
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return do_clone_tests(clone_flags, fn1, arg1, fn2, arg2);
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case T_UNSHARE:
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return do_unshare_tests(clone_flags, fn1, arg1, fn2, arg2);
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default:
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printf("%s: bad use_clone option: %d\n", __FUNCTION__,
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use_clone);
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return -1;
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}
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}
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