1/* $NetBSD: mv.c,v 1.46 2020/06/24 16:58:12 riastradh Exp $ */ 2 3/* 4 * Copyright (c) 1989, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Ken Smith of The State University of New York at Buffalo. 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 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35#include <sys/cdefs.h> 36#ifndef lint 37__COPYRIGHT("@(#) Copyright (c) 1989, 1993, 1994\ 38 The Regents of the University of California. All rights reserved."); 39#endif /* not lint */ 40 41#ifndef lint 42#if 0 43static char sccsid[] = "@(#)mv.c 8.2 (Berkeley) 4/2/94"; 44#else 45__RCSID("$NetBSD: mv.c,v 1.46 2020/06/24 16:58:12 riastradh Exp $"); 46#endif 47#endif /* not lint */ 48 49#include <sys/param.h> 50#include <sys/time.h> 51#include <sys/wait.h> 52#include <sys/stat.h> 53#include <sys/extattr.h> 54 55#include <err.h> 56#include <errno.h> 57#include <fcntl.h> 58#include <grp.h> 59#include <locale.h> 60#include <pwd.h> 61#include <stdio.h> 62#include <stdlib.h> 63#include <string.h> 64#include <unistd.h> 65 66#include "pathnames.h" 67 68static int fflg, hflg, iflg, vflg; 69static int stdin_ok; 70static sig_atomic_t pinfo; 71 72static int copy(char *, char *); 73static int do_move(char *, char *); 74static int fastcopy(char *, char *, struct stat *); 75__dead static void usage(void); 76 77static void 78progress(int sig __unused) 79{ 80 81 pinfo++; 82} 83 84int 85main(int argc, char *argv[]) 86{ 87 int ch, len, rval; 88 char *p, *endp; 89 struct stat sb; 90 char path[MAXPATHLEN + 1]; 91 size_t baselen; 92 93 setprogname(argv[0]); 94 (void)setlocale(LC_ALL, ""); 95 96 while ((ch = getopt(argc, argv, "hifv")) != -1) 97 switch (ch) { 98 case 'h': 99 hflg = 1; 100 break; 101 case 'i': 102 fflg = 0; 103 iflg = 1; 104 break; 105 case 'f': 106 iflg = 0; 107 fflg = 1; 108 break; 109 case 'v': 110 vflg = 1; 111 break; 112 default: 113 usage(); 114 } 115 argc -= optind; 116 argv += optind; 117 118 if (argc < 2) 119 usage(); 120 121 stdin_ok = isatty(STDIN_FILENO); 122 123 (void)signal(SIGINFO, progress); 124 125 /* 126 * If the stat on the target fails or the target isn't a directory, 127 * try the move. More than 2 arguments is an error in this case. 128 */ 129 if (hflg || stat(argv[argc - 1], &sb) || !S_ISDIR(sb.st_mode)) { 130 if (argc > 2) 131 usage(); 132 exit(do_move(argv[0], argv[1])); 133 } 134 135 /* It's a directory, move each file into it. */ 136 baselen = strlcpy(path, argv[argc - 1], sizeof(path)); 137 if (baselen >= sizeof(path)) 138 errx(1, "%s: destination pathname too long", argv[argc - 1]); 139 endp = &path[baselen]; 140 if (!baselen || *(endp - 1) != '/') { 141 *endp++ = '/'; 142 ++baselen; 143 } 144 for (rval = 0; --argc; ++argv) { 145 p = *argv + strlen(*argv) - 1; 146 while (*p == '/' && p != *argv) 147 *p-- = '\0'; 148 if ((p = strrchr(*argv, '/')) == NULL) 149 p = *argv; 150 else 151 ++p; 152 153 if ((baselen + (len = strlen(p))) >= MAXPATHLEN) { 154 warnx("%s: destination pathname too long", *argv); 155 rval = 1; 156 } else { 157 memmove(endp, p, len + 1); 158 if (do_move(*argv, path)) 159 rval = 1; 160 } 161 } 162 exit(rval); 163 /* NOTREACHED */ 164} 165 166static int 167do_move(char *from, char *to) 168{ 169 struct stat sb; 170 char modep[15]; 171 172 /* 173 * (1) If the destination path exists, the -f option is not specified 174 * and either of the following conditions are true: 175 * 176 * (a) The permissions of the destination path do not permit 177 * writing and the standard input is a terminal. 178 * (b) The -i option is specified. 179 * 180 * the mv utility shall write a prompt to standard error and 181 * read a line from standard input. If the response is not 182 * affirmative, mv shall do nothing more with the current 183 * source file... 184 */ 185 if (!fflg && !access(to, F_OK)) { 186 int ask = 1; 187 int ch; 188 189 if (iflg) { 190 if (access(from, F_OK)) { 191 warn("rename %s", from); 192 return (1); 193 } 194 (void)fprintf(stderr, "overwrite %s? ", to); 195 } else if (stdin_ok && access(to, W_OK) && !stat(to, &sb)) { 196 if (access(from, F_OK)) { 197 warn("rename %s", from); 198 return (1); 199 } 200 strmode(sb.st_mode, modep); 201 (void)fprintf(stderr, "override %s%s%s/%s for %s? ", 202 modep + 1, modep[9] == ' ' ? "" : " ", 203 user_from_uid(sb.st_uid, 0), 204 group_from_gid(sb.st_gid, 0), to); 205 } else 206 ask = 0; 207 if (ask) { 208 if ((ch = getchar()) != EOF && ch != '\n') { 209 int ch2; 210 while ((ch2 = getchar()) != EOF && ch2 != '\n') 211 continue; 212 } 213 if (ch != 'y' && ch != 'Y') 214 return (0); 215 } 216 } 217 218 /* 219 * (2) If rename() succeeds, mv shall do nothing more with the 220 * current source file. If it fails for any other reason than 221 * EXDEV, mv shall write a diagnostic message to the standard 222 * error and do nothing more with the current source file. 223 * 224 * (3) If the destination path exists, and it is a file of type 225 * directory and source_file is not a file of type directory, 226 * or it is a file not of type directory, and source file is 227 * a file of type directory, mv shall write a diagnostic 228 * message to standard error, and do nothing more with the 229 * current source file... 230 */ 231 if (!rename(from, to)) { 232 if (vflg) 233 printf("%s -> %s\n", from, to); 234 return (0); 235 } 236 237 if (errno != EXDEV) { 238 warn("rename %s to %s", from, to); 239 return (1); 240 } 241 242 /* 243 * (4) If the destination path exists, mv shall attempt to remove it. 244 * If this fails for any reason, mv shall write a diagnostic 245 * message to the standard error and do nothing more with the 246 * current source file... 247 */ 248 if (!lstat(to, &sb)) { 249 if ((S_ISDIR(sb.st_mode)) ? rmdir(to) : unlink(to)) { 250 warn("can't remove %s", to); 251 return (1); 252 } 253 } 254 255 /* 256 * (5) The file hierarchy rooted in source_file shall be duplicated 257 * as a file hierarchy rooted in the destination path... 258 */ 259 if (lstat(from, &sb)) { 260 warn("%s", from); 261 return (1); 262 } 263 264 return (S_ISREG(sb.st_mode) ? 265 fastcopy(from, to, &sb) : copy(from, to)); 266} 267 268static int 269fastcopy(char *from, char *to, struct stat *sbp) 270{ 271#if defined(__NetBSD__) 272 struct timespec ts[2]; 273#else 274 struct timeval tval[2]; 275#endif 276 static blksize_t blen; 277 static char *bp; 278 int from_fd, to_fd; 279 ssize_t nread; 280 off_t total = 0; 281 282 if ((from_fd = open(from, O_RDONLY, 0)) < 0) { 283 warn("%s", from); 284 return (1); 285 } 286 if ((to_fd = 287 open(to, O_CREAT | O_TRUNC | O_WRONLY, sbp->st_mode)) < 0) { 288 warn("%s", to); 289 (void)close(from_fd); 290 return (1); 291 } 292 if (!blen && !(bp = malloc(blen = sbp->st_blksize))) { 293 warn(NULL); 294 blen = 0; 295 (void)close(from_fd); 296 (void)close(to_fd); 297 return (1); 298 } 299 while ((nread = read(from_fd, bp, blen)) > 0) { 300 if (write(to_fd, bp, nread) != nread) { 301 warn("%s", to); 302 goto err; 303 } 304 total += nread; 305 if (pinfo) { 306 int pcent = (int)((100.0 * total) / sbp->st_size); 307 308 pinfo = 0; 309 (void)fprintf(stderr, "%s => %s %llu/%llu bytes %d%% " 310 "written\n", from, to, (unsigned long long)total, 311 (unsigned long long)sbp->st_size, pcent); 312 } 313 } 314 if (nread < 0) { 315 warn("%s", from); 316err: if (unlink(to)) 317 warn("%s: remove", to); 318 (void)close(from_fd); 319 (void)close(to_fd); 320 return (1); 321 } 322 323 if (fcpxattr(from_fd, to_fd) == -1) 324 warn("%s: error copying extended attributes", to); 325 326 (void)close(from_fd); 327#ifdef BSD4_4 328#if defined(__NetBSD__) 329 ts[0] = sbp->st_atimespec; 330 ts[1] = sbp->st_mtimespec; 331#else 332 TIMESPEC_TO_TIMEVAL(&tval[0], &sbp->st_atimespec); 333 TIMESPEC_TO_TIMEVAL(&tval[1], &sbp->st_mtimespec); 334#endif 335#else 336 tval[0].tv_sec = sbp->st_atime; 337 tval[1].tv_sec = sbp->st_mtime; 338 tval[0].tv_usec = 0; 339 tval[1].tv_usec = 0; 340#endif 341#ifdef __SVR4 342 if (utimes(to, tval)) 343#else 344#if defined(__NetBSD__) 345 if (futimens(to_fd, ts)) 346#else 347 if (futimes(to_fd, tval)) 348#endif 349#endif 350 warn("%s: set times", to); 351 if (fchown(to_fd, sbp->st_uid, sbp->st_gid)) { 352 if (errno != EPERM) 353 warn("%s: set owner/group", to); 354 sbp->st_mode &= ~(S_ISUID | S_ISGID); 355 } 356 if (fchmod(to_fd, sbp->st_mode)) 357 warn("%s: set mode", to); 358 if (fchflags(to_fd, sbp->st_flags) && (errno != EOPNOTSUPP)) 359 warn("%s: set flags (was: 0%07o)", to, sbp->st_flags); 360 361 if (close(to_fd)) { 362 warn("%s", to); 363 return (1); 364 } 365 366 if (unlink(from)) { 367 warn("%s: remove", from); 368 return (1); 369 } 370 371 if (vflg) 372 printf("%s -> %s\n", from, to); 373 374 return (0); 375} 376 377static int 378copy(char *from, char *to) 379{ 380 pid_t pid; 381 int status; 382 383 if ((pid = vfork()) == 0) { 384 execl(_PATH_CP, "mv", vflg ? "-PRpv" : "-PRp", "--", from, to, NULL); 385 warn("%s", _PATH_CP); 386 _exit(1); 387 } 388 if (waitpid(pid, &status, 0) == -1) { 389 warn("%s: waitpid", _PATH_CP); 390 return (1); 391 } 392 if (!WIFEXITED(status)) { 393 warnx("%s: did not terminate normally", _PATH_CP); 394 return (1); 395 } 396 if (WEXITSTATUS(status)) { 397 warnx("%s: terminated with %d (non-zero) status", 398 _PATH_CP, WEXITSTATUS(status)); 399 return (1); 400 } 401 if (!(pid = vfork())) { 402 execl(_PATH_RM, "mv", "-rf", "--", from, NULL); 403 warn("%s", _PATH_RM); 404 _exit(1); 405 } 406 if (waitpid(pid, &status, 0) == -1) { 407 warn("%s: waitpid", _PATH_RM); 408 return (1); 409 } 410 if (!WIFEXITED(status)) { 411 warnx("%s: did not terminate normally", _PATH_RM); 412 return (1); 413 } 414 if (WEXITSTATUS(status)) { 415 warnx("%s: terminated with %d (non-zero) status", 416 _PATH_RM, WEXITSTATUS(status)); 417 return (1); 418 } 419 return (0); 420} 421 422static void 423usage(void) 424{ 425 (void)fprintf(stderr, "usage: %s [-fhiv] source target\n" 426 " %s [-fiv] source ... directory\n", getprogname(), 427 getprogname()); 428 exit(1); 429 /* NOTREACHED */ 430} 431