1 /* $NetBSD: t_proccwd.c,v 1.2 2019/06/01 22:18:23 kamil Exp $ */ 2 /*- 3 * Copyright (c) 2019 The NetBSD Foundation, Inc. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 16 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 17 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 19 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25 * POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __COPYRIGHT("@(#) Copyright (c) 2019\ 30 The NetBSD Foundation, inc. All rights reserved."); 31 __RCSID("$NetBSD: t_proccwd.c,v 1.2 2019/06/01 22:18:23 kamil Exp $"); 32 33 #include <sys/types.h> 34 #include <sys/stat.h> 35 #include <sys/sysctl.h> 36 #include <sys/wait.h> 37 38 #include <errno.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <err.h> 43 44 #include <atf-c.h> 45 46 static int 47 getproccwd(char *path, size_t *len, pid_t pid) 48 { 49 const int name[] = { 50 CTL_KERN, KERN_PROC_ARGS, pid, KERN_PROC_CWD, 51 }; 52 53 return sysctl(name, __arraycount(name), path, len, NULL, 0); 54 } 55 56 ATF_TC(prompt_pid); 57 ATF_TC_HEAD(prompt_pid, tc) 58 { 59 60 atf_tc_set_md_var(tc, "descr", 61 "Prompt length of the current dir and assert that it is sane"); 62 } 63 64 ATF_TC_BODY(prompt_pid, tc) 65 { 66 char buf[MAXPATHLEN]; 67 char cwdbuf[MAXPATHLEN]; 68 size_t len, prompted_len; 69 size_t i; 70 71 pid_t t[] = { 72 -1, 73 getpid(), 74 1 /* /sbin/init */ 75 }; 76 77 for (i = 0; i < __arraycount(t); i++) { 78 len = 0; 79 ATF_REQUIRE_EQ(getproccwd(NULL, &len, t[i]), 0); 80 81 prompted_len = len; 82 ATF_REQUIRE_EQ(getproccwd(buf, &len, t[i]), 0); 83 84 ATF_REQUIRE_EQ(strlen(buf) + 1, prompted_len); 85 ATF_REQUIRE(strlen(buf) > 0); 86 87 if (t[i] == -1 || t[i] == getpid()) { 88 getcwd(cwdbuf, MAXPATHLEN); 89 ATF_REQUIRE_EQ(strcmp(buf, cwdbuf), 0); 90 ATF_REQUIRE(strlen(buf) > strlen("/")); 91 } else if (t[i] == 1) { 92 ATF_REQUIRE_EQ(strcmp(buf, "/"), 0); 93 } 94 } 95 } 96 97 ATF_TC(chroot); 98 ATF_TC_HEAD(chroot, tc) 99 { 100 101 atf_tc_set_md_var(tc, "descr", 102 "prompt length of the current dir and assert that it is right"); 103 104 atf_tc_set_md_var(tc, "require.user", "root"); 105 } 106 107 #define ASSERT(x) do { if (!(x)) _exit(EXIT_FAILURE); } while (0) 108 109 ATF_TC_BODY(chroot, tc) 110 { 111 char buf[MAXPATHLEN]; 112 struct stat root_dir; 113 struct stat cur_dir; 114 size_t len; 115 pid_t child, wpid; 116 int status; 117 int rv; 118 119 const pid_t pid_one = 1; /* /sbin/init */ 120 121 ATF_REQUIRE(getcwd(buf, sizeof(buf)) != NULL); 122 123 ATF_REQUIRE_EQ(stat(buf, &cur_dir), 0); 124 ATF_REQUIRE_EQ(stat("/", &root_dir), 0); 125 126 if (cur_dir.st_ino == root_dir.st_ino) 127 atf_tc_skip("This test does not work in /"); 128 129 child = atf_utils_fork(); 130 if (child == 0) { 131 len = 0; 132 133 ASSERT(chroot(buf) == 0); 134 135 errno = 0; 136 rv = getproccwd(buf, &len, pid_one); 137 ASSERT(rv == -1); 138 ASSERT(errno == ENOENT); 139 140 _exit(EXIT_SUCCESS); 141 } 142 wpid = waitpid(child, &status, WEXITED); 143 ATF_REQUIRE_EQ(wpid, child); 144 ATF_REQUIRE_EQ(WEXITSTATUS(status), EXIT_SUCCESS); 145 } 146 147 ATF_TP_ADD_TCS(tp) 148 { 149 150 ATF_TP_ADD_TC(tp, prompt_pid); 151 ATF_TP_ADD_TC(tp, chroot); 152 153 return atf_no_error(); 154 } 155