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 22 static int dummy_child(void *v) 23 { 24 (void) v; 25 return 0; 26 } 27 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 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
