You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
292 lines
8.5 KiB
292 lines
8.5 KiB
/*************************************************************************/
|
|
/* Copyright (c) Crackerjack Project., 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*/
|
|
/* */
|
|
/*************************************************************************/
|
|
/*************************************************************************/
|
|
/* */
|
|
/* File: unshare01.c */
|
|
/* */
|
|
/* Description: This tests the unshare() syscall. */
|
|
/* unshare() allows a process to disassociate parts of its */
|
|
/* execution context that are currently being shared with other */
|
|
/* processes. Part of the execution context, such as the namespace */
|
|
/* ,is shared implicitly when a new process is created using */
|
|
/* fork(2) or vfork(2), while other parts, such as virtual memory */
|
|
/* , may be shared by explicit request when creating a process */
|
|
/* using clone(2). */
|
|
/* */
|
|
/* The main use of unshare() is to allow a process to control its */
|
|
/* shared execution context without creating a new process. */
|
|
/* */
|
|
/* */
|
|
/* The flags argument is a bit mask that specifies which parts of */
|
|
/* the execution context should be unshared. This argument is */
|
|
/* specified by ORing together zero or more of the following cons- */
|
|
/* tants: */
|
|
/* */
|
|
/* CLONE_FILES: */
|
|
/* Reverse the effect of the clone(2) CLONE_FILES flag. */
|
|
/* Unshare the file descriptor table, so that the calling */
|
|
/* process no longer shares its file descriptors with any */
|
|
/* other process. */
|
|
/* CLONE_FS: */
|
|
/* Reverse the effect of the clone(2) CLONE_FS flag.Unshare*/
|
|
/* file system attributes, so that the calling process no */
|
|
/* longer shares its root directory, current directory, or */
|
|
/* umask attributes with any other process. */
|
|
/* CLONE_NEWNS: */
|
|
/* This flag has the same effect as the clone(2) CLONE_NEWNS*/
|
|
/* flag. Unshare the namespace, so that the calling process*/
|
|
/* has a private copy of its namespacei which is not shared*/
|
|
/* with any other process. Specifying this flag automat- */
|
|
/* ically implies CLONE_FS as well. */
|
|
/* */
|
|
/* If flags is specified as zero, then unshare() is a no-op; no */
|
|
/* changes are made to the calling process's execution context. */
|
|
/* */
|
|
/* Usage: <for command-line> */
|
|
/* unshare01 [-c n] [-e][-i n] [-I x] [-p x] [-t] */
|
|
/* where, -c n : Run n copies concurrently. */
|
|
/* -e : Turn on errno logging. */
|
|
/* -i n : Execute test n times. */
|
|
/* -I x : Execute test for x seconds. */
|
|
/* -P x : Pause for x seconds between iterations. */
|
|
/* -t : Turn on syscall timing. */
|
|
/* */
|
|
/* Total Tests: 1 */
|
|
/* */
|
|
/* Test Name: unshare01 */
|
|
/* History: Porting from Crackerjack to LTP is done by */
|
|
/* Manas Kumar Nayak maknayak@in.ibm.com> */
|
|
/********************************************************************************/
|
|
|
|
#define _GNU_SOURCE
|
|
|
|
#include <stdio.h>
|
|
#include <sys/wait.h>
|
|
#include <sys/types.h>
|
|
#include <sched.h>
|
|
#include <limits.h>
|
|
#include <unistd.h>
|
|
#include <sys/types.h>
|
|
#include <sys/syscall.h>
|
|
#include <errno.h>
|
|
#include <pwd.h>
|
|
#include <grp.h>
|
|
#include <string.h>
|
|
#include <sys/param.h>
|
|
#include <stdio.h>
|
|
|
|
#include "test.h"
|
|
#include "safe_macros.h"
|
|
#include "config.h"
|
|
|
|
char *TCID = "unshare01";
|
|
int testno;
|
|
int TST_TOTAL = 1;
|
|
|
|
#ifdef HAVE_UNSHARE
|
|
|
|
/* Extern Global Functions */
|
|
/******************************************************************************/
|
|
/* */
|
|
/* Function: cleanup */
|
|
/* */
|
|
/* Description: Performs all one time clean up for this test on successful */
|
|
/* completion, premature exit or failure. Closes all temporary */
|
|
/* files, removes all temporary directories exits the test with */
|
|
/* appropriate return code by calling tst_exit() function. */
|
|
/* */
|
|
/* Input: None. */
|
|
/* */
|
|
/* Output: None. */
|
|
/* */
|
|
/* Return: On failure - Exits calling tst_exit(). Non '0' return code. */
|
|
/* On success - Exits calling tst_exit(). With '0' return code. */
|
|
/* */
|
|
/******************************************************************************/
|
|
void cleanup(void)
|
|
{
|
|
|
|
tst_rmdir();
|
|
}
|
|
|
|
/* Local Functions */
|
|
/******************************************************************************/
|
|
/* */
|
|
/* Function: setup */
|
|
/* */
|
|
/* Description: Performs all one time setup for this test. This function is */
|
|
/* typically used to capture signals, create temporary dirs */
|
|
/* and temporary files that may be used in the course of this */
|
|
/* test. */
|
|
/* */
|
|
/* Input: None. */
|
|
/* */
|
|
/* Output: None. */
|
|
/* */
|
|
/* Return: On failure - Exits by calling cleanup(). */
|
|
/* On success - returns 0. */
|
|
/* */
|
|
/******************************************************************************/
|
|
void setup(void)
|
|
{
|
|
tst_require_root();
|
|
|
|
/* Capture signals if any */
|
|
/* Create temporary directories */
|
|
TEST_PAUSE;
|
|
tst_tmpdir();
|
|
}
|
|
|
|
int main(int ac, char **av)
|
|
{
|
|
pid_t pid1;
|
|
int lc;
|
|
int rval;
|
|
|
|
tst_parse_opts(ac, av, NULL, NULL);
|
|
|
|
setup();
|
|
|
|
for (lc = 0; TEST_LOOPING(lc); ++lc) {
|
|
tst_count = 0;
|
|
for (testno = 0; testno < TST_TOTAL; ++testno) {
|
|
|
|
pid1 = fork(); //call to fork()
|
|
if (pid1 == -1) {
|
|
tst_brkm(TFAIL | TERRNO, cleanup,
|
|
"fork failed");
|
|
} else if (pid1 == 0) {
|
|
switch (unshare(CLONE_FILES)) {
|
|
case 0:
|
|
printf("unshare with CLONE_FILES call "
|
|
"succeeded\n");
|
|
rval = 0;
|
|
break;
|
|
case -1:
|
|
if (errno == ENOSYS)
|
|
rval = 1;
|
|
else {
|
|
perror("unshare failed");
|
|
rval = 2;
|
|
}
|
|
}
|
|
exit(rval);
|
|
} else {
|
|
SAFE_WAIT(cleanup, &rval);
|
|
if (rval != 0 && WIFEXITED(rval)) {
|
|
switch (WEXITSTATUS(rval)) {
|
|
case 1:
|
|
tst_brkm(TCONF, cleanup,
|
|
"unshare not supported in "
|
|
"kernel");
|
|
break;
|
|
default:
|
|
tst_brkm(TFAIL, cleanup,
|
|
"unshare failed");
|
|
}
|
|
}
|
|
}
|
|
|
|
pid1 = fork();
|
|
if (pid1 == -1) {
|
|
tst_brkm(TFAIL | TERRNO, cleanup,
|
|
"fork failed");
|
|
} else if (pid1 == 0) {
|
|
switch (unshare(CLONE_FS)) {
|
|
case 0:
|
|
printf("unshare with CLONE_FS call "
|
|
"succeeded\n");
|
|
rval = 0;
|
|
break;
|
|
case -1:
|
|
if (errno == ENOSYS)
|
|
rval = 1;
|
|
else {
|
|
perror("unshare failed");
|
|
rval = 2;
|
|
}
|
|
}
|
|
exit(rval);
|
|
} else {
|
|
SAFE_WAIT(cleanup, &rval);
|
|
if (rval != 0 && WIFEXITED(rval)) {
|
|
switch (WEXITSTATUS(rval)) {
|
|
case 1:
|
|
tst_brkm(TCONF, cleanup,
|
|
"unshare not supported in "
|
|
"kernel");
|
|
break;
|
|
default:
|
|
tst_brkm(TFAIL, cleanup,
|
|
"unshare failed");
|
|
}
|
|
}
|
|
}
|
|
|
|
pid1 = fork();
|
|
if (pid1 == -1) {
|
|
tst_brkm(TFAIL | TERRNO, cleanup,
|
|
"fork() failed.");
|
|
} else if (pid1 == 0) {
|
|
switch (unshare(CLONE_NEWNS)) {
|
|
case 0:
|
|
printf("unshare call with CLONE_NEWNS "
|
|
"succeeded\n");
|
|
rval = 0;
|
|
break;
|
|
case -1:
|
|
if (errno == ENOSYS)
|
|
rval = 1;
|
|
else {
|
|
perror("unshare failed");
|
|
rval = 2;
|
|
}
|
|
}
|
|
exit(rval);
|
|
} else {
|
|
SAFE_WAIT(cleanup, &rval);
|
|
if (rval != 0 && WIFEXITED(rval)) {
|
|
switch (WEXITSTATUS(rval)) {
|
|
case 1:
|
|
tst_brkm(TCONF, cleanup,
|
|
"unshare not supported in "
|
|
"kernel");
|
|
break;
|
|
default:
|
|
tst_brkm(TFAIL, cleanup,
|
|
"unshare failed");
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
cleanup();
|
|
tst_exit();
|
|
}
|
|
#else
|
|
int main(void)
|
|
{
|
|
tst_brkm(TCONF, NULL, "unshare is undefined.");
|
|
}
|
|
#endif
|