David Drysdale | c9b26b8 | 2014-12-12 16:57:36 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2014 Google, Inc. |
| 3 | * |
| 4 | * Licensed under the terms of the GNU GPL License version 2 |
| 5 | * |
| 6 | * Selftests for execveat(2). |
| 7 | */ |
| 8 | |
| 9 | #define _GNU_SOURCE /* to get O_PATH, AT_EMPTY_PATH */ |
| 10 | #include <sys/sendfile.h> |
| 11 | #include <sys/stat.h> |
| 12 | #include <sys/syscall.h> |
| 13 | #include <sys/types.h> |
| 14 | #include <sys/wait.h> |
| 15 | #include <errno.h> |
| 16 | #include <fcntl.h> |
| 17 | #include <limits.h> |
| 18 | #include <stdio.h> |
| 19 | #include <stdlib.h> |
| 20 | #include <string.h> |
| 21 | #include <unistd.h> |
| 22 | |
Shuah Khan (Samsung OSG) | 964224d | 2018-05-02 18:24:42 -0600 | [diff] [blame] | 23 | #include "../kselftest.h" |
| 24 | |
David Drysdale | c9b26b8 | 2014-12-12 16:57:36 -0800 | [diff] [blame] | 25 | static char longpath[2 * PATH_MAX] = ""; |
| 26 | static char *envp[] = { "IN_TEST=yes", NULL, NULL }; |
| 27 | static char *argv[] = { "execveat", "99", NULL }; |
| 28 | |
| 29 | static int execveat_(int fd, const char *path, char **argv, char **envp, |
| 30 | int flags) |
| 31 | { |
| 32 | #ifdef __NR_execveat |
| 33 | return syscall(__NR_execveat, fd, path, argv, envp, flags); |
| 34 | #else |
Michael Ellerman | 9a0b574 | 2015-02-03 14:53:08 +1100 | [diff] [blame] | 35 | errno = ENOSYS; |
David Drysdale | c9b26b8 | 2014-12-12 16:57:36 -0800 | [diff] [blame] | 36 | return -1; |
| 37 | #endif |
| 38 | } |
| 39 | |
| 40 | #define check_execveat_fail(fd, path, flags, errno) \ |
| 41 | _check_execveat_fail(fd, path, flags, errno, #errno) |
| 42 | static int _check_execveat_fail(int fd, const char *path, int flags, |
| 43 | int expected_errno, const char *errno_str) |
| 44 | { |
| 45 | int rc; |
| 46 | |
| 47 | errno = 0; |
| 48 | printf("Check failure of execveat(%d, '%s', %d) with %s... ", |
| 49 | fd, path?:"(null)", flags, errno_str); |
| 50 | rc = execveat_(fd, path, argv, envp, flags); |
| 51 | |
| 52 | if (rc > 0) { |
| 53 | printf("[FAIL] (unexpected success from execveat(2))\n"); |
| 54 | return 1; |
| 55 | } |
| 56 | if (errno != expected_errno) { |
| 57 | printf("[FAIL] (expected errno %d (%s) not %d (%s)\n", |
| 58 | expected_errno, strerror(expected_errno), |
| 59 | errno, strerror(errno)); |
| 60 | return 1; |
| 61 | } |
| 62 | printf("[OK]\n"); |
| 63 | return 0; |
| 64 | } |
| 65 | |
| 66 | static int check_execveat_invoked_rc(int fd, const char *path, int flags, |
David Drysdale | cd805f3 | 2015-01-06 08:23:56 +0000 | [diff] [blame] | 67 | int expected_rc, int expected_rc2) |
David Drysdale | c9b26b8 | 2014-12-12 16:57:36 -0800 | [diff] [blame] | 68 | { |
| 69 | int status; |
| 70 | int rc; |
| 71 | pid_t child; |
| 72 | int pathlen = path ? strlen(path) : 0; |
| 73 | |
| 74 | if (pathlen > 40) |
| 75 | printf("Check success of execveat(%d, '%.20s...%s', %d)... ", |
| 76 | fd, path, (path + pathlen - 20), flags); |
| 77 | else |
| 78 | printf("Check success of execveat(%d, '%s', %d)... ", |
| 79 | fd, path?:"(null)", flags); |
| 80 | child = fork(); |
| 81 | if (child < 0) { |
| 82 | printf("[FAIL] (fork() failed)\n"); |
| 83 | return 1; |
| 84 | } |
| 85 | if (child == 0) { |
| 86 | /* Child: do execveat(). */ |
| 87 | rc = execveat_(fd, path, argv, envp, flags); |
| 88 | printf("[FAIL]: execveat() failed, rc=%d errno=%d (%s)\n", |
| 89 | rc, errno, strerror(errno)); |
| 90 | exit(1); /* should not reach here */ |
| 91 | } |
| 92 | /* Parent: wait for & check child's exit status. */ |
| 93 | rc = waitpid(child, &status, 0); |
| 94 | if (rc != child) { |
| 95 | printf("[FAIL] (waitpid(%d,...) returned %d)\n", child, rc); |
| 96 | return 1; |
| 97 | } |
| 98 | if (!WIFEXITED(status)) { |
| 99 | printf("[FAIL] (child %d did not exit cleanly, status=%08x)\n", |
| 100 | child, status); |
| 101 | return 1; |
| 102 | } |
David Drysdale | cd805f3 | 2015-01-06 08:23:56 +0000 | [diff] [blame] | 103 | if ((WEXITSTATUS(status) != expected_rc) && |
| 104 | (WEXITSTATUS(status) != expected_rc2)) { |
| 105 | printf("[FAIL] (child %d exited with %d not %d nor %d)\n", |
| 106 | child, WEXITSTATUS(status), expected_rc, expected_rc2); |
David Drysdale | c9b26b8 | 2014-12-12 16:57:36 -0800 | [diff] [blame] | 107 | return 1; |
| 108 | } |
| 109 | printf("[OK]\n"); |
| 110 | return 0; |
| 111 | } |
| 112 | |
| 113 | static int check_execveat(int fd, const char *path, int flags) |
| 114 | { |
David Drysdale | cd805f3 | 2015-01-06 08:23:56 +0000 | [diff] [blame] | 115 | return check_execveat_invoked_rc(fd, path, flags, 99, 99); |
David Drysdale | c9b26b8 | 2014-12-12 16:57:36 -0800 | [diff] [blame] | 116 | } |
| 117 | |
| 118 | static char *concat(const char *left, const char *right) |
| 119 | { |
| 120 | char *result = malloc(strlen(left) + strlen(right) + 1); |
| 121 | |
| 122 | strcpy(result, left); |
| 123 | strcat(result, right); |
| 124 | return result; |
| 125 | } |
| 126 | |
| 127 | static int open_or_die(const char *filename, int flags) |
| 128 | { |
| 129 | int fd = open(filename, flags); |
| 130 | |
| 131 | if (fd < 0) { |
| 132 | printf("Failed to open '%s'; " |
| 133 | "check prerequisites are available\n", filename); |
| 134 | exit(1); |
| 135 | } |
| 136 | return fd; |
| 137 | } |
| 138 | |
| 139 | static void exe_cp(const char *src, const char *dest) |
| 140 | { |
| 141 | int in_fd = open_or_die(src, O_RDONLY); |
| 142 | int out_fd = open(dest, O_RDWR|O_CREAT|O_TRUNC, 0755); |
| 143 | struct stat info; |
| 144 | |
| 145 | fstat(in_fd, &info); |
| 146 | sendfile(out_fd, in_fd, NULL, info.st_size); |
| 147 | close(in_fd); |
| 148 | close(out_fd); |
| 149 | } |
| 150 | |
| 151 | #define XX_DIR_LEN 200 |
Steve Muckle | 2d80c92 | 2017-10-12 21:44:57 -0700 | [diff] [blame] | 152 | static int check_execveat_pathmax(int root_dfd, const char *src, int is_script) |
David Drysdale | c9b26b8 | 2014-12-12 16:57:36 -0800 | [diff] [blame] | 153 | { |
| 154 | int fail = 0; |
| 155 | int ii, count, len; |
| 156 | char longname[XX_DIR_LEN + 1]; |
| 157 | int fd; |
| 158 | |
| 159 | if (*longpath == '\0') { |
| 160 | /* Create a filename close to PATH_MAX in length */ |
Steve Muckle | 2d80c92 | 2017-10-12 21:44:57 -0700 | [diff] [blame] | 161 | char *cwd = getcwd(NULL, 0); |
| 162 | |
| 163 | if (!cwd) { |
| 164 | printf("Failed to getcwd(), errno=%d (%s)\n", |
| 165 | errno, strerror(errno)); |
| 166 | return 2; |
| 167 | } |
| 168 | strcpy(longpath, cwd); |
| 169 | strcat(longpath, "/"); |
David Drysdale | c9b26b8 | 2014-12-12 16:57:36 -0800 | [diff] [blame] | 170 | memset(longname, 'x', XX_DIR_LEN - 1); |
| 171 | longname[XX_DIR_LEN - 1] = '/'; |
| 172 | longname[XX_DIR_LEN] = '\0'; |
Steve Muckle | 2d80c92 | 2017-10-12 21:44:57 -0700 | [diff] [blame] | 173 | count = (PATH_MAX - 3 - strlen(cwd)) / XX_DIR_LEN; |
David Drysdale | c9b26b8 | 2014-12-12 16:57:36 -0800 | [diff] [blame] | 174 | for (ii = 0; ii < count; ii++) { |
| 175 | strcat(longpath, longname); |
| 176 | mkdir(longpath, 0755); |
| 177 | } |
Steve Muckle | 2d80c92 | 2017-10-12 21:44:57 -0700 | [diff] [blame] | 178 | len = (PATH_MAX - 3 - strlen(cwd)) - (count * XX_DIR_LEN); |
David Drysdale | c9b26b8 | 2014-12-12 16:57:36 -0800 | [diff] [blame] | 179 | if (len <= 0) |
| 180 | len = 1; |
| 181 | memset(longname, 'y', len); |
| 182 | longname[len] = '\0'; |
| 183 | strcat(longpath, longname); |
Steve Muckle | 2d80c92 | 2017-10-12 21:44:57 -0700 | [diff] [blame] | 184 | free(cwd); |
David Drysdale | c9b26b8 | 2014-12-12 16:57:36 -0800 | [diff] [blame] | 185 | } |
| 186 | exe_cp(src, longpath); |
| 187 | |
| 188 | /* |
| 189 | * Execute as a pre-opened file descriptor, which works whether this is |
| 190 | * a script or not (because the interpreter sees a filename like |
| 191 | * "/dev/fd/20"). |
| 192 | */ |
| 193 | fd = open(longpath, O_RDONLY); |
| 194 | if (fd > 0) { |
Geert Uytterhoeven | 6898b62 | 2014-12-21 11:58:16 +0100 | [diff] [blame] | 195 | printf("Invoke copy of '%s' via filename of length %zu:\n", |
David Drysdale | c9b26b8 | 2014-12-12 16:57:36 -0800 | [diff] [blame] | 196 | src, strlen(longpath)); |
| 197 | fail += check_execveat(fd, "", AT_EMPTY_PATH); |
| 198 | } else { |
Geert Uytterhoeven | 6898b62 | 2014-12-21 11:58:16 +0100 | [diff] [blame] | 199 | printf("Failed to open length %zu filename, errno=%d (%s)\n", |
David Drysdale | c9b26b8 | 2014-12-12 16:57:36 -0800 | [diff] [blame] | 200 | strlen(longpath), errno, strerror(errno)); |
| 201 | fail++; |
| 202 | } |
| 203 | |
| 204 | /* |
Steve Muckle | 2d80c92 | 2017-10-12 21:44:57 -0700 | [diff] [blame] | 205 | * Execute as a long pathname relative to "/". If this is a script, |
David Drysdale | c9b26b8 | 2014-12-12 16:57:36 -0800 | [diff] [blame] | 206 | * the interpreter will launch but fail to open the script because its |
| 207 | * name ("/dev/fd/5/xxx....") is bigger than PATH_MAX. |
David Drysdale | cd805f3 | 2015-01-06 08:23:56 +0000 | [diff] [blame] | 208 | * |
| 209 | * The failure code is usually 127 (POSIX: "If a command is not found, |
| 210 | * the exit status shall be 127."), but some systems give 126 (POSIX: |
| 211 | * "If the command name is found, but it is not an executable utility, |
| 212 | * the exit status shall be 126."), so allow either. |
David Drysdale | c9b26b8 | 2014-12-12 16:57:36 -0800 | [diff] [blame] | 213 | */ |
| 214 | if (is_script) |
Steve Muckle | 2d80c92 | 2017-10-12 21:44:57 -0700 | [diff] [blame] | 215 | fail += check_execveat_invoked_rc(root_dfd, longpath + 1, 0, |
David Drysdale | cd805f3 | 2015-01-06 08:23:56 +0000 | [diff] [blame] | 216 | 127, 126); |
David Drysdale | c9b26b8 | 2014-12-12 16:57:36 -0800 | [diff] [blame] | 217 | else |
Steve Muckle | 2d80c92 | 2017-10-12 21:44:57 -0700 | [diff] [blame] | 218 | fail += check_execveat(root_dfd, longpath + 1, 0); |
David Drysdale | c9b26b8 | 2014-12-12 16:57:36 -0800 | [diff] [blame] | 219 | |
| 220 | return fail; |
| 221 | } |
| 222 | |
| 223 | static int run_tests(void) |
| 224 | { |
| 225 | int fail = 0; |
| 226 | char *fullname = realpath("execveat", NULL); |
| 227 | char *fullname_script = realpath("script", NULL); |
| 228 | char *fullname_symlink = concat(fullname, ".symlink"); |
| 229 | int subdir_dfd = open_or_die("subdir", O_DIRECTORY|O_RDONLY); |
| 230 | int subdir_dfd_ephemeral = open_or_die("subdir.ephemeral", |
| 231 | O_DIRECTORY|O_RDONLY); |
| 232 | int dot_dfd = open_or_die(".", O_DIRECTORY|O_RDONLY); |
Steve Muckle | 2d80c92 | 2017-10-12 21:44:57 -0700 | [diff] [blame] | 233 | int root_dfd = open_or_die("/", O_DIRECTORY|O_RDONLY); |
David Drysdale | c9b26b8 | 2014-12-12 16:57:36 -0800 | [diff] [blame] | 234 | int dot_dfd_path = open_or_die(".", O_DIRECTORY|O_RDONLY|O_PATH); |
| 235 | int dot_dfd_cloexec = open_or_die(".", O_DIRECTORY|O_RDONLY|O_CLOEXEC); |
| 236 | int fd = open_or_die("execveat", O_RDONLY); |
| 237 | int fd_path = open_or_die("execveat", O_RDONLY|O_PATH); |
| 238 | int fd_symlink = open_or_die("execveat.symlink", O_RDONLY); |
| 239 | int fd_denatured = open_or_die("execveat.denatured", O_RDONLY); |
| 240 | int fd_denatured_path = open_or_die("execveat.denatured", |
| 241 | O_RDONLY|O_PATH); |
| 242 | int fd_script = open_or_die("script", O_RDONLY); |
| 243 | int fd_ephemeral = open_or_die("execveat.ephemeral", O_RDONLY); |
| 244 | int fd_ephemeral_path = open_or_die("execveat.path.ephemeral", |
| 245 | O_RDONLY|O_PATH); |
| 246 | int fd_script_ephemeral = open_or_die("script.ephemeral", O_RDONLY); |
| 247 | int fd_cloexec = open_or_die("execveat", O_RDONLY|O_CLOEXEC); |
| 248 | int fd_script_cloexec = open_or_die("script", O_RDONLY|O_CLOEXEC); |
| 249 | |
Michael Ellerman | 9a0b574 | 2015-02-03 14:53:08 +1100 | [diff] [blame] | 250 | /* Check if we have execveat at all, and bail early if not */ |
| 251 | errno = 0; |
| 252 | execveat_(-1, NULL, NULL, NULL, 0); |
| 253 | if (errno == ENOSYS) { |
Shuah Khan (Samsung OSG) | 964224d | 2018-05-02 18:24:42 -0600 | [diff] [blame] | 254 | ksft_exit_skip( |
| 255 | "ENOSYS calling execveat - no kernel support?\n"); |
Michael Ellerman | 9a0b574 | 2015-02-03 14:53:08 +1100 | [diff] [blame] | 256 | } |
| 257 | |
David Drysdale | c9b26b8 | 2014-12-12 16:57:36 -0800 | [diff] [blame] | 258 | /* Change file position to confirm it doesn't affect anything */ |
| 259 | lseek(fd, 10, SEEK_SET); |
| 260 | |
| 261 | /* Normal executable file: */ |
| 262 | /* dfd + path */ |
| 263 | fail += check_execveat(subdir_dfd, "../execveat", 0); |
| 264 | fail += check_execveat(dot_dfd, "execveat", 0); |
| 265 | fail += check_execveat(dot_dfd_path, "execveat", 0); |
| 266 | /* absolute path */ |
| 267 | fail += check_execveat(AT_FDCWD, fullname, 0); |
| 268 | /* absolute path with nonsense dfd */ |
| 269 | fail += check_execveat(99, fullname, 0); |
| 270 | /* fd + no path */ |
| 271 | fail += check_execveat(fd, "", AT_EMPTY_PATH); |
| 272 | /* O_CLOEXEC fd + no path */ |
| 273 | fail += check_execveat(fd_cloexec, "", AT_EMPTY_PATH); |
| 274 | /* O_PATH fd */ |
| 275 | fail += check_execveat(fd_path, "", AT_EMPTY_PATH); |
| 276 | |
| 277 | /* Mess with executable file that's already open: */ |
| 278 | /* fd + no path to a file that's been renamed */ |
| 279 | rename("execveat.ephemeral", "execveat.moved"); |
| 280 | fail += check_execveat(fd_ephemeral, "", AT_EMPTY_PATH); |
| 281 | /* fd + no path to a file that's been deleted */ |
| 282 | unlink("execveat.moved"); /* remove the file now fd open */ |
| 283 | fail += check_execveat(fd_ephemeral, "", AT_EMPTY_PATH); |
| 284 | |
| 285 | /* Mess with executable file that's already open with O_PATH */ |
| 286 | /* fd + no path to a file that's been deleted */ |
| 287 | unlink("execveat.path.ephemeral"); |
| 288 | fail += check_execveat(fd_ephemeral_path, "", AT_EMPTY_PATH); |
| 289 | |
| 290 | /* Invalid argument failures */ |
| 291 | fail += check_execveat_fail(fd, "", 0, ENOENT); |
| 292 | fail += check_execveat_fail(fd, NULL, AT_EMPTY_PATH, EFAULT); |
| 293 | |
| 294 | /* Symlink to executable file: */ |
| 295 | /* dfd + path */ |
| 296 | fail += check_execveat(dot_dfd, "execveat.symlink", 0); |
| 297 | fail += check_execveat(dot_dfd_path, "execveat.symlink", 0); |
| 298 | /* absolute path */ |
| 299 | fail += check_execveat(AT_FDCWD, fullname_symlink, 0); |
| 300 | /* fd + no path, even with AT_SYMLINK_NOFOLLOW (already followed) */ |
| 301 | fail += check_execveat(fd_symlink, "", AT_EMPTY_PATH); |
| 302 | fail += check_execveat(fd_symlink, "", |
| 303 | AT_EMPTY_PATH|AT_SYMLINK_NOFOLLOW); |
| 304 | |
| 305 | /* Symlink fails when AT_SYMLINK_NOFOLLOW set: */ |
| 306 | /* dfd + path */ |
| 307 | fail += check_execveat_fail(dot_dfd, "execveat.symlink", |
| 308 | AT_SYMLINK_NOFOLLOW, ELOOP); |
| 309 | fail += check_execveat_fail(dot_dfd_path, "execveat.symlink", |
| 310 | AT_SYMLINK_NOFOLLOW, ELOOP); |
| 311 | /* absolute path */ |
| 312 | fail += check_execveat_fail(AT_FDCWD, fullname_symlink, |
| 313 | AT_SYMLINK_NOFOLLOW, ELOOP); |
| 314 | |
| 315 | /* Shell script wrapping executable file: */ |
| 316 | /* dfd + path */ |
| 317 | fail += check_execveat(subdir_dfd, "../script", 0); |
| 318 | fail += check_execveat(dot_dfd, "script", 0); |
| 319 | fail += check_execveat(dot_dfd_path, "script", 0); |
| 320 | /* absolute path */ |
| 321 | fail += check_execveat(AT_FDCWD, fullname_script, 0); |
| 322 | /* fd + no path */ |
| 323 | fail += check_execveat(fd_script, "", AT_EMPTY_PATH); |
| 324 | fail += check_execveat(fd_script, "", |
| 325 | AT_EMPTY_PATH|AT_SYMLINK_NOFOLLOW); |
| 326 | /* O_CLOEXEC fd fails for a script (as script file inaccessible) */ |
| 327 | fail += check_execveat_fail(fd_script_cloexec, "", AT_EMPTY_PATH, |
| 328 | ENOENT); |
| 329 | fail += check_execveat_fail(dot_dfd_cloexec, "script", 0, ENOENT); |
| 330 | |
| 331 | /* Mess with script file that's already open: */ |
| 332 | /* fd + no path to a file that's been renamed */ |
| 333 | rename("script.ephemeral", "script.moved"); |
| 334 | fail += check_execveat(fd_script_ephemeral, "", AT_EMPTY_PATH); |
| 335 | /* fd + no path to a file that's been deleted */ |
| 336 | unlink("script.moved"); /* remove the file while fd open */ |
| 337 | fail += check_execveat(fd_script_ephemeral, "", AT_EMPTY_PATH); |
| 338 | |
| 339 | /* Rename a subdirectory in the path: */ |
| 340 | rename("subdir.ephemeral", "subdir.moved"); |
| 341 | fail += check_execveat(subdir_dfd_ephemeral, "../script", 0); |
| 342 | fail += check_execveat(subdir_dfd_ephemeral, "script", 0); |
| 343 | /* Remove the subdir and its contents */ |
| 344 | unlink("subdir.moved/script"); |
| 345 | unlink("subdir.moved"); |
| 346 | /* Shell loads via deleted subdir OK because name starts with .. */ |
| 347 | fail += check_execveat(subdir_dfd_ephemeral, "../script", 0); |
| 348 | fail += check_execveat_fail(subdir_dfd_ephemeral, "script", 0, ENOENT); |
| 349 | |
| 350 | /* Flag values other than AT_SYMLINK_NOFOLLOW => EINVAL */ |
| 351 | fail += check_execveat_fail(dot_dfd, "execveat", 0xFFFF, EINVAL); |
| 352 | /* Invalid path => ENOENT */ |
| 353 | fail += check_execveat_fail(dot_dfd, "no-such-file", 0, ENOENT); |
| 354 | fail += check_execveat_fail(dot_dfd_path, "no-such-file", 0, ENOENT); |
| 355 | fail += check_execveat_fail(AT_FDCWD, "no-such-file", 0, ENOENT); |
| 356 | /* Attempt to execute directory => EACCES */ |
| 357 | fail += check_execveat_fail(dot_dfd, "", AT_EMPTY_PATH, EACCES); |
| 358 | /* Attempt to execute non-executable => EACCES */ |
| 359 | fail += check_execveat_fail(dot_dfd, "Makefile", 0, EACCES); |
| 360 | fail += check_execveat_fail(fd_denatured, "", AT_EMPTY_PATH, EACCES); |
| 361 | fail += check_execveat_fail(fd_denatured_path, "", AT_EMPTY_PATH, |
| 362 | EACCES); |
| 363 | /* Attempt to execute nonsense FD => EBADF */ |
| 364 | fail += check_execveat_fail(99, "", AT_EMPTY_PATH, EBADF); |
| 365 | fail += check_execveat_fail(99, "execveat", 0, EBADF); |
| 366 | /* Attempt to execute relative to non-directory => ENOTDIR */ |
| 367 | fail += check_execveat_fail(fd, "execveat", 0, ENOTDIR); |
| 368 | |
Steve Muckle | 2d80c92 | 2017-10-12 21:44:57 -0700 | [diff] [blame] | 369 | fail += check_execveat_pathmax(root_dfd, "execveat", 0); |
| 370 | fail += check_execveat_pathmax(root_dfd, "script", 1); |
David Drysdale | c9b26b8 | 2014-12-12 16:57:36 -0800 | [diff] [blame] | 371 | return fail; |
| 372 | } |
| 373 | |
| 374 | static void prerequisites(void) |
| 375 | { |
| 376 | int fd; |
| 377 | const char *script = "#!/bin/sh\nexit $*\n"; |
| 378 | |
| 379 | /* Create ephemeral copies of files */ |
| 380 | exe_cp("execveat", "execveat.ephemeral"); |
| 381 | exe_cp("execveat", "execveat.path.ephemeral"); |
| 382 | exe_cp("script", "script.ephemeral"); |
| 383 | mkdir("subdir.ephemeral", 0755); |
| 384 | |
| 385 | fd = open("subdir.ephemeral/script", O_RDWR|O_CREAT|O_TRUNC, 0755); |
| 386 | write(fd, script, strlen(script)); |
| 387 | close(fd); |
| 388 | } |
| 389 | |
| 390 | int main(int argc, char **argv) |
| 391 | { |
| 392 | int ii; |
| 393 | int rc; |
| 394 | const char *verbose = getenv("VERBOSE"); |
| 395 | |
| 396 | if (argc >= 2) { |
| 397 | /* If we are invoked with an argument, don't run tests. */ |
| 398 | const char *in_test = getenv("IN_TEST"); |
| 399 | |
| 400 | if (verbose) { |
| 401 | printf(" invoked with:"); |
| 402 | for (ii = 0; ii < argc; ii++) |
| 403 | printf(" [%d]='%s'", ii, argv[ii]); |
| 404 | printf("\n"); |
| 405 | } |
| 406 | |
| 407 | /* Check expected environment transferred. */ |
| 408 | if (!in_test || strcmp(in_test, "yes") != 0) { |
| 409 | printf("[FAIL] (no IN_TEST=yes in env)\n"); |
| 410 | return 1; |
| 411 | } |
| 412 | |
| 413 | /* Use the final argument as an exit code. */ |
| 414 | rc = atoi(argv[argc - 1]); |
| 415 | fflush(stdout); |
| 416 | } else { |
| 417 | prerequisites(); |
| 418 | if (verbose) |
| 419 | envp[1] = "VERBOSE=1"; |
| 420 | rc = run_tests(); |
| 421 | if (rc > 0) |
| 422 | printf("%d tests failed\n", rc); |
| 423 | } |
| 424 | return rc; |
| 425 | } |