1 /*
2 * Copyright (c) Huawei Technologies Co., Ltd., 2015
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License as published by
5 * the Free Software Foundation; either version 2 of the License, or
6 * (at your option) any later version.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
11 * the GNU General Public License for more details.
12 */
13
14 #include "../libclone/libclone.h"
15 #include "test.h"
16 #include "safe_macros.h"
17 #include <stdbool.h>
18
19 #define UID_MAP 0
20 #define GID_MAP 1
21
dummy_child(void * v)22 static int dummy_child(void *v)
23 {
24 (void) v;
25 return 0;
26 }
27
check_newuser(void)28 static int check_newuser(void)
29 {
30 int pid, status;
31
32 if (tst_kvercmp(3, 8, 0) < 0)
33 tst_brkm(TCONF, NULL, "CLONE_NEWUSER not supported");
34
35 pid = do_clone_unshare_test(T_CLONE, CLONE_NEWUSER, dummy_child, NULL);
36 if (pid == -1)
37 tst_brkm(TCONF | TERRNO, NULL, "CLONE_NEWUSER not supported");
38 SAFE_WAIT(NULL, &status);
39
40 return 0;
41 }
42
updatemap(int cpid,bool type,int idnum,int parentmappid,void (* cleanup)(void))43 LTP_ATTRIBUTE_UNUSED static int updatemap(int cpid, bool type, int idnum,
44 int parentmappid, void (*cleanup)(void))
45 {
46 char path[BUFSIZ];
47 char content[BUFSIZ];
48 int fd;
49
50 if (type == UID_MAP)
51 sprintf(path, "/proc/%d/uid_map", cpid);
52 else if (type == GID_MAP)
53 sprintf(path, "/proc/%d/gid_map", cpid);
54 else
55 tst_brkm(TBROK, cleanup, "invalid type parameter");
56
57 sprintf(content, "%d %d 1", idnum, parentmappid);
58 fd = SAFE_OPEN(cleanup, path, O_WRONLY, 0644);
59 SAFE_WRITE(cleanup, 1, fd, content, strlen(content));
60 SAFE_CLOSE(cleanup, fd);
61 return 0;
62 }
63