t_fchownat.c revision 313535
1/* $NetBSD: t_fchownat.c,v 1.4 2017/01/10 15:13:56 christos Exp $ */ 2 3/*- 4 * Copyright (c) 2012 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Emmanuel Dreyfus. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31#include <sys/cdefs.h> 32__RCSID("$NetBSD: t_fchownat.c,v 1.4 2017/01/10 15:13:56 christos Exp $"); 33 34#include <sys/param.h> 35#include <sys/stat.h> 36#include <atf-c.h> 37#include <errno.h> 38#include <fcntl.h> 39#include <limits.h> 40#include <paths.h> 41#include <stdio.h> 42#include <string.h> 43#include <unistd.h> 44#include <pwd.h> 45 46#define DIR "dir" 47#define FILE "dir/fchownat" 48#define BASEFILE "fchownat" 49#define LINK "dir/symlink" 50#define BASELINK "symlink" 51#define FILEERR "dir/fchownaterr" 52#define USER "nobody" 53 54static int getuser(uid_t *, gid_t *); 55 56static int getuser(uid_t *uid, gid_t *gid) 57{ 58 struct passwd *pw; 59 60 if ((pw = getpwnam(USER)) == NULL) 61 return -1; 62 63 *uid = pw->pw_uid; 64 *gid = pw->pw_gid; 65 66 return 0; 67} 68 69ATF_TC(fchownat_fd); 70ATF_TC_HEAD(fchownat_fd, tc) 71{ 72 atf_tc_set_md_var(tc, "descr", "See that fchownat works with fd"); 73 atf_tc_set_md_var(tc, "require.user", "root"); 74} 75ATF_TC_BODY(fchownat_fd, tc) 76{ 77 int dfd; 78 int fd; 79 uid_t uid; 80 gid_t gid; 81 struct stat st; 82 83 ATF_REQUIRE(getuser(&uid, &gid) == 0); 84 ATF_REQUIRE(mkdir(DIR, 0755) == 0); 85 ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1); 86 ATF_REQUIRE(close(fd) == 0); 87 88 ATF_REQUIRE((dfd = open(DIR, O_RDONLY, 0)) != -1); 89 ATF_REQUIRE(fchownat(dfd, BASEFILE, uid, gid, 0) == 0); 90 ATF_REQUIRE(close(dfd) == 0); 91 92 ATF_REQUIRE(stat(FILE, &st) == 0); 93 ATF_REQUIRE(st.st_uid == uid); 94 ATF_REQUIRE(st.st_gid == gid); 95} 96 97ATF_TC(fchownat_fdcwd); 98ATF_TC_HEAD(fchownat_fdcwd, tc) 99{ 100 atf_tc_set_md_var(tc, "descr", 101 "See that fchownat works with fd as AT_FDCWD"); 102 atf_tc_set_md_var(tc, "require.user", "root"); 103} 104ATF_TC_BODY(fchownat_fdcwd, tc) 105{ 106 int fd; 107 uid_t uid; 108 gid_t gid; 109 struct stat st; 110 111 ATF_REQUIRE(getuser(&uid, &gid) == 0); 112 ATF_REQUIRE(mkdir(DIR, 0755) == 0); 113 ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1); 114 ATF_REQUIRE(close(fd) == 0); 115 116 ATF_REQUIRE(chdir(DIR) == 0); 117 ATF_REQUIRE(fchownat(AT_FDCWD, BASEFILE, uid, gid, 0) == 0); 118 119 ATF_REQUIRE(stat(BASEFILE, &st) == 0); 120 ATF_REQUIRE(st.st_uid == uid); 121 ATF_REQUIRE(st.st_gid == gid); 122} 123 124ATF_TC(fchownat_fdcwderr); 125ATF_TC_HEAD(fchownat_fdcwderr, tc) 126{ 127 atf_tc_set_md_var(tc, "descr", 128 "See that fchownat fails with fd as AT_FDCWD and bad path"); 129 atf_tc_set_md_var(tc, "require.user", "root"); 130} 131ATF_TC_BODY(fchownat_fdcwderr, tc) 132{ 133 uid_t uid; 134 gid_t gid; 135 136 ATF_REQUIRE(getuser(&uid, &gid) == 0); 137 ATF_REQUIRE(mkdir(DIR, 0755) == 0); 138 ATF_REQUIRE(fchownat(AT_FDCWD, FILEERR, uid, gid, 0) == -1); 139} 140 141ATF_TC(fchownat_fderr1); 142ATF_TC_HEAD(fchownat_fderr1, tc) 143{ 144 atf_tc_set_md_var(tc, "descr", "See that fchownat fail with bad path"); 145 atf_tc_set_md_var(tc, "require.user", "root"); 146} 147ATF_TC_BODY(fchownat_fderr1, tc) 148{ 149 int dfd; 150 uid_t uid; 151 gid_t gid; 152 153 ATF_REQUIRE(getuser(&uid, &gid) == 0); 154 ATF_REQUIRE(mkdir(DIR, 0755) == 0); 155 ATF_REQUIRE((dfd = open(DIR, O_RDONLY, 0)) != -1); 156 ATF_REQUIRE(fchownat(dfd, FILEERR, uid, gid, 0) == -1); 157 ATF_REQUIRE(close(dfd) == 0); 158} 159 160ATF_TC(fchownat_fderr2); 161ATF_TC_HEAD(fchownat_fderr2, tc) 162{ 163 atf_tc_set_md_var(tc, "descr", "See that fchownat fails with bad fdat"); 164 atf_tc_set_md_var(tc, "require.user", "root"); 165} 166ATF_TC_BODY(fchownat_fderr2, tc) 167{ 168 int dfd; 169 int fd; 170 char cwd[MAXPATHLEN]; 171 uid_t uid; 172 gid_t gid; 173 174 ATF_REQUIRE(getuser(&uid, &gid) == 0); 175 ATF_REQUIRE(mkdir(DIR, 0755) == 0); 176 ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1); 177 ATF_REQUIRE(close(fd) == 0); 178 179 ATF_REQUIRE((dfd = open(getcwd(cwd, MAXPATHLEN), O_RDONLY, 0)) != -1); 180 ATF_REQUIRE(fchownat(dfd, BASEFILE, uid, gid, 0) == -1); 181 ATF_REQUIRE(close(dfd) == 0); 182} 183 184ATF_TC(fchownat_fderr3); 185ATF_TC_HEAD(fchownat_fderr3, tc) 186{ 187 atf_tc_set_md_var(tc, "descr", "See that fchownat fails with fd as -1"); 188 atf_tc_set_md_var(tc, "require.user", "root"); 189} 190ATF_TC_BODY(fchownat_fderr3, tc) 191{ 192 int fd; 193 uid_t uid; 194 gid_t gid; 195 196 ATF_REQUIRE(getuser(&uid, &gid) == 0); 197 ATF_REQUIRE(mkdir(DIR, 0755) == 0); 198 ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1); 199 ATF_REQUIRE(close(fd) == 0); 200 201 ATF_REQUIRE(fchownat(-1, FILE, uid, gid, 0) == -1); 202} 203 204ATF_TC(fchownat_fdlink); 205ATF_TC_HEAD(fchownat_fdlink, tc) 206{ 207 atf_tc_set_md_var(tc, "descr", "See that fchownat works on symlink"); 208 atf_tc_set_md_var(tc, "require.user", "root"); 209} 210ATF_TC_BODY(fchownat_fdlink, tc) 211{ 212 int dfd; 213 uid_t uid; 214 gid_t gid; 215 struct stat st; 216 217 ATF_REQUIRE(getuser(&uid, &gid) == 0); 218 ATF_REQUIRE(mkdir(DIR, 0755) == 0); 219 ATF_REQUIRE(symlink(FILE, LINK) == 0); /* Target does not exists */ 220 221 ATF_REQUIRE((dfd = open(DIR, O_RDONLY, 0)) != -1); 222 223 ATF_REQUIRE(fchownat(dfd, BASELINK, uid, gid, 0) == -1); 224 ATF_REQUIRE(errno == ENOENT); 225 226 ATF_REQUIRE(fchownat(dfd, BASELINK, uid, gid, 227 AT_SYMLINK_NOFOLLOW) == 0); 228 229 ATF_REQUIRE(close(dfd) == 0); 230 231 ATF_REQUIRE(lstat(LINK, &st) == 0); 232 ATF_REQUIRE(st.st_uid == uid); 233 ATF_REQUIRE(st.st_gid == gid); 234} 235 236ATF_TP_ADD_TCS(tp) 237{ 238 239 ATF_TP_ADD_TC(tp, fchownat_fd); 240 ATF_TP_ADD_TC(tp, fchownat_fdcwd); 241 ATF_TP_ADD_TC(tp, fchownat_fdcwderr); 242 ATF_TP_ADD_TC(tp, fchownat_fderr1); 243 ATF_TP_ADD_TC(tp, fchownat_fderr2); 244 ATF_TP_ADD_TC(tp, fchownat_fderr3); 245 ATF_TP_ADD_TC(tp, fchownat_fdlink); 246 247 return atf_no_error(); 248} 249