| /* |
| * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| * |
| *************************************************************************** |
| * Copyright 2007 IBM |
| * Author: Serge Hallyn <serue@us.ibm.com> |
| * |
| * test1: |
| P1: A=gethostname |
| P2: B=gethostname |
| Ensure(A==B) |
| |
| * test2: |
| P1: sethostname(A); |
| P2: (wait); B=gethostname |
| Ensure (A==B) |
| |
| * test3: |
| P1: A=gethostname; unshare(utsname); sethostname(newname); C=gethostname |
| P2: B=gethostname; (wait); (wait); D=gethostname |
| Ensure (A==B && A==D && C!=D) |
| |
| * test4: |
| P1: A=gethostname; unshare(utsname); (wait); C=gethostname |
| P2: B=gethostname; (wait); sethostname(newname); D=gethostname |
| Ensure (A==B && A==C && C!=D) |
| |
| * test5: |
| P1: drop_privs(); unshare(utsname); (wait); C=gethostname |
| P2: (wait); sethostname(B); D=gethostname |
| Ensure (B==C==D) and state is ok. |
| * |
| */ |
| |
| #define _GNU_SOURCE 1 |
| #include <sys/wait.h> |
| #include <assert.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <string.h> |
| #include <errno.h> |
| #include "test.h" |
| #include <libclone.h> |
| |
| char *TCID = "uts_namespace"; |
| int TST_TOTAL=1; |
| |
| int drop_root() |
| { |
| int ret; |
| ret = setresuid(1000, 1000, 1000); |
| if (ret) { |
| perror("setresuid"); |
| exit(4); |
| } |
| return 1; |
| } |
| |
| int p1fd[2], p2fd[2]; |
| pid_t cpid; |
| |
| #define HLEN 100 |
| #define NAME1 "serge1" |
| #define NAME2 "serge2" |
| |
| void picknewhostname(char *orig, char *new) |
| { |
| memset(new, 0, HLEN); |
| if (strcmp(orig, NAME1) == 0) |
| strcpy(new, NAME2); |
| else |
| strcpy(new, NAME1); |
| } |
| |
| void zeroize(char *s) |
| { |
| memset(s, 0, HLEN); |
| } |
| |
| char *tsttype; |
| int P1(void *vtest) |
| { |
| char hostname[HLEN], newhostname[HLEN], rhostname[HLEN]; |
| int err; |
| int len; |
| int testnum; |
| |
| testnum = atoi((char *)vtest); |
| |
| close(p1fd[1]); |
| close(p2fd[0]); |
| |
| switch(testnum) { |
| case 1: |
| gethostname(hostname, HLEN); |
| zeroize(rhostname); |
| len = read(p1fd[0], rhostname, HLEN); |
| if (strcmp(hostname, rhostname) == 0) { |
| tst_resm(TPASS, "test 1 (%s): success\n", tsttype); |
| tst_exit(); |
| } |
| tst_resm(TFAIL, "test 1 (%s): hostname 1 %s, hostname 2 %s\n", |
| tsttype, hostname, rhostname); |
| tst_exit(); |
| case 2: |
| gethostname(hostname, HLEN); |
| picknewhostname(hostname, newhostname); |
| err = sethostname(newhostname, strlen(newhostname)); |
| write(p2fd[1], "1", 1); |
| if (err == -1) { |
| tst_resm(TFAIL, "test 2 (%s): failed to sethostname", |
| tsttype); |
| tst_exit(); |
| } |
| zeroize(rhostname); |
| len = read(p1fd[0], rhostname, HLEN); |
| if (strcmp(newhostname, rhostname) == 0) { |
| tst_resm(TPASS, "test 2 (%s): success\n", |
| tsttype); |
| tst_exit(); |
| } |
| tst_resm(TFAIL, "test 2 (%s) hostname 1 %s, hostname 2 %s\n", |
| tsttype, newhostname, rhostname); |
| tst_exit(); |
| case 3: |
| gethostname(hostname, HLEN); |
| picknewhostname(hostname, newhostname); |
| err = sethostname(newhostname, strlen(newhostname)); |
| write(p2fd[1], "1", 1); |
| if (err == -1) { |
| tst_resm(TFAIL, "test 3 (%s): failed to sethostname", |
| tsttype); |
| tst_exit(); |
| } |
| |
| zeroize(rhostname); |
| len = read(p1fd[0], rhostname, HLEN); |
| if (strcmp(newhostname, rhostname) == 0) { |
| tst_resm(TFAIL, "test 3 (%s): hostname 1 %s, hostname 2 %s, these should have been different\n", |
| tsttype, newhostname, rhostname); |
| tst_exit(); |
| } |
| if (strcmp(hostname, rhostname) == 0) { |
| tst_resm(TPASS, "test 3 (%s): success\n", tsttype); |
| tst_exit(); |
| } |
| tst_resm(TFAIL, "test 3 (%s): hostname 1 %s, hostname 2 %s, should have been same\n", |
| tsttype, hostname, rhostname); |
| tst_exit(); |
| |
| case 4: |
| gethostname(hostname, HLEN); |
| write(p2fd[1], "1", 1); /* tell p2 to go ahead and sethostname */ |
| zeroize(rhostname); |
| len = read(p1fd[0], rhostname, HLEN); |
| gethostname(newhostname, HLEN); |
| if (strcmp(hostname, newhostname) != 0) { |
| tst_resm(TFAIL, "test 4 (%s): hostname 1 %s, hostname 2 %s, should be same\n", |
| tsttype, hostname, newhostname); |
| tst_exit(); |
| } |
| if (strcmp(hostname, rhostname) == 0) { |
| tst_resm(TFAIL, "test 4 (%s): hostname 1 %s, hostname 2 %s, should be different", |
| tsttype, hostname, rhostname); |
| tst_exit(); |
| } |
| tst_resm(TPASS, "test 4 (%s): successful\n", tsttype); |
| tst_exit(); |
| case 5: |
| write(p2fd[1], "1", 1); /* tell p2 to go ahead and sethostname */ |
| zeroize(rhostname); |
| len = read(p1fd[0], rhostname, HLEN); |
| gethostname(newhostname, HLEN); |
| if (strcmp(rhostname, newhostname) != 0) { |
| tst_resm(TFAIL, "test 5 (%s): hostnames %s and %s should be same\n", |
| tsttype, rhostname, newhostname); |
| tst_exit(); |
| } |
| tst_resm(TPASS, "test 5 (%s): successful", tsttype); |
| tst_exit(); |
| default: |
| break; |
| } |
| return -1; |
| } |
| |
| int P2(void *vtest) |
| { |
| char hostname[HLEN], newhostname[HLEN]; |
| int len; |
| int testnum; |
| |
| testnum = atoi((char *)vtest); |
| |
| close(p1fd[0]); |
| close(p2fd[1]); |
| |
| switch(testnum) { |
| case 1: |
| gethostname(hostname, HLEN); |
| write(p1fd[1], hostname, strlen(hostname)); |
| break; |
| case 2: |
| case 3: |
| len = 0; |
| while (!len) { |
| len = read(p2fd[0], hostname, 1); |
| } |
| gethostname(hostname, HLEN); |
| write(p1fd[1], hostname, strlen(hostname)); |
| break; |
| case 4: |
| case 5: |
| len = 0; |
| while (!len) { |
| len = read(p2fd[0], hostname, 1); |
| } |
| if (hostname[0] == '0') { |
| tst_resm(TPASS, "P2: P1 claims error\n"); |
| tst_exit(); |
| exit(0); |
| } |
| gethostname(hostname, HLEN); |
| picknewhostname(hostname, newhostname); |
| sethostname(newhostname, strlen(newhostname)); |
| write(p1fd[1], newhostname, strlen(newhostname)); |
| break; |
| default: |
| tst_resm(TFAIL, "undefined test: %d\n", testnum); |
| break; |
| } |
| tst_exit(); |
| return 0; |
| } |
| |
| #define UNSHARESTR "unshare" |
| #define CLONESTR "clone" |
| int main(int argc, char *argv[]) |
| { |
| int r, pid, use_clone = T_UNSHARE; |
| int testnum; |
| void *vtest; |
| |
| if (argc != 3) { |
| tst_resm(TFAIL, "Usage: %s <clone|unshare> <testnum>\n", argv[0]); |
| tst_resm(TFAIL, " where clone or unshare specifies unshare method,"); |
| tst_resm(TFAIL, " and testnum is between 1 and 5 inclusive\n"); |
| exit(2); |
| } |
| if (pipe(p1fd) == -1) { perror("pipe"); exit(EXIT_FAILURE); } |
| if (pipe(p2fd) == -1) { perror("pipe"); exit(EXIT_FAILURE); } |
| |
| tsttype = UNSHARESTR; |
| if (strcmp(argv[1], "clone") == 0) { |
| use_clone = T_CLONE; |
| tsttype = CLONESTR; |
| } |
| |
| testnum = atoi(argv[2]); |
| |
| vtest = (void *)argv[2]; |
| switch(testnum) { |
| case 1: |
| case 2: r = do_clone_unshare_tests(T_NONE, 0, |
| P1, vtest, P2, vtest); |
| break; |
| case 3: |
| case 4: |
| r = do_clone_unshare_tests(use_clone, CLONE_NEWUTS, |
| P1, vtest, P2, vtest); |
| break; |
| case 5: |
| pid = fork(); |
| if (pid == -1) { |
| perror("fork"); |
| exit(2); |
| } |
| if (pid == 0) { |
| if (!drop_root()) { |
| tst_resm(TFAIL, "failed to drop root.\n"); |
| tst_exit(); |
| exit(1); |
| } |
| r = do_clone_unshare_test(use_clone, CLONE_NEWUTS, |
| P1, vtest); |
| write(p2fd[1], "0", 1); /* don't let p2 hang */ |
| exit(0); |
| } else { |
| P2(vtest); |
| } |
| break; |
| default: |
| tst_resm(TFAIL, "testnum should be between 1 and 5 inclusive.\n"); |
| break; |
| } |
| |
| tst_exit(); |
| } |