/*
* Copyright (c) International Business Machines Corp., 2007
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
* the GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
***************************************************************************/
#include "libclone.h"
int do_clone_tests(unsigned long clone_flags,
int (*fn1) (void *arg), void *arg1,
int (*fn2) (void *arg), void *arg2)
{
int ret;
ret = ltp_clone_quick(clone_flags | SIGCHLD, fn1, arg1);
if (ret == -1) {
return -1;
}
if (fn2)
ret = fn2(arg2);
else
ret = 0;
return ret;
}
int do_unshare_tests(unsigned long clone_flags,
int (*fn1) (void *arg), void *arg1,
int (*fn2) (void *arg), void *arg2)
{
int pid, ret = 0;
int retpipe[2];
char buf[2];
if (pipe(retpipe) == -1) {
perror("pipe");
return -1;
}
pid = fork();
if (pid == -1) {
perror("fork");
close(retpipe[0]);
close(retpipe[1]);
return -1;
}
if (pid == 0) {
close(retpipe[0]);
ret = ltp_syscall(SYS_unshare, clone_flags);
if (ret == -1) {
if (write(retpipe[1], "0", 2) < 0) {
perror("unshare:write(retpipe[1], ..)");
}
close(retpipe[1]);
exit(1);
} else {
if (write(retpipe[1], "1", 2) < 0) {
perror("unshare:write(retpipe[1], ..)");
}
}
close(retpipe[1]);
ret = fn1(arg1);
exit(ret);
} else {
close(retpipe[1]);
if (read(retpipe[0], &buf, 2) < 0) {
perror("unshare:read(retpipe[0], ..)");
}
close(retpipe[0]);
if (*buf == '0')
return -1;
if (fn2)
ret = fn2(arg2);
}
return ret;
}
int do_plain_tests(int (*fn1) (void *arg), void *arg1,
int (*fn2) (void *arg), void *arg2)
{
int ret = 0, pid;
pid = fork();
if (pid == -1) {
perror("fork");
return -1;
}
if (pid == 0)
exit(fn1(arg1));
if (fn2)
ret = fn2(arg2);
return ret;
}
int do_clone_unshare_test(int use_clone, unsigned long clone_flags,
int (*fn1) (void *arg), void *arg1)
{
switch (use_clone) {
case T_NONE:
return do_plain_tests(fn1, arg1, NULL, NULL);
case T_CLONE:
return do_clone_tests(clone_flags, fn1, arg1, NULL, NULL);
case T_UNSHARE:
return do_unshare_tests(clone_flags, fn1, arg1, NULL, NULL);
default:
printf("%s: bad use_clone option: %d\n", __FUNCTION__,
use_clone);
return -1;
}
}
/*
* Run fn1 in a unshared environmnent, and fn2 in the original context
*/
int do_clone_unshare_tests(int use_clone, unsigned long clone_flags,
int (*fn1) (void *arg), void *arg1,
int (*fn2) (void *arg), void *arg2)
{
switch (use_clone) {
case T_NONE:
return do_plain_tests(fn1, arg1, fn2, arg2);
case T_CLONE:
return do_clone_tests(clone_flags, fn1, arg1, fn2, arg2);
case T_UNSHARE:
return do_unshare_tests(clone_flags, fn1, arg1, fn2, arg2);
default:
printf("%s: bad use_clone option: %d\n", __FUNCTION__,
use_clone);
return -1;
}
}