| 1 | /* |
| 2 | * Copyright (c) 1980 Regents of the University of California. |
| 3 | * All rights reserved. The Berkeley software License Agreement |
| 4 | * specifies the terms and conditions for redistribution. |
| 5 | */ |
| 6 | |
| 7 | #ifndef lint |
| 8 | char copyright[] = |
| 9 | "@(#) Copyright (c) 1980 Regents of the University of California.\n\ |
| 10 | All rights reserved.\n"; |
| 11 | #endif not lint |
| 12 | |
| 13 | #ifndef lint |
| 14 | static char sccsid[] = "@(#)mv.c 5.3 (Berkeley) %G%"; |
| 15 | #endif not lint |
| 16 | |
| 17 | /* |
| 18 | * mv file1 file2 |
| 19 | */ |
| 20 | #include <sys/param.h> |
| 21 | #include <sys/stat.h> |
| 22 | #include <sys/time.h> |
| 23 | |
| 24 | #include <stdio.h> |
| 25 | #include <sys/dir.h> |
| 26 | #include <errno.h> |
| 27 | #include <signal.h> |
| 28 | |
| 29 | #define DELIM '/' |
| 30 | #define MODEBITS 07777 |
| 31 | |
| 32 | #define ISDIR(st) (((st).st_mode&S_IFMT) == S_IFDIR) |
| 33 | #define ISLNK(st) (((st).st_mode&S_IFMT) == S_IFLNK) |
| 34 | #define ISREG(st) (((st).st_mode&S_IFMT) == S_IFREG) |
| 35 | #define ISDEV(st) \ |
| 36 | (((st).st_mode&S_IFMT) == S_IFCHR || ((st).st_mode&S_IFMT) == S_IFBLK) |
| 37 | |
| 38 | char *sprintf(); |
| 39 | char *dname(); |
| 40 | struct stat s1, s2; |
| 41 | int iflag = 0; /* interactive mode */ |
| 42 | int fflag = 0; /* force overwriting */ |
| 43 | extern unsigned errno; |
| 44 | |
| 45 | main(argc, argv) |
| 46 | register char *argv[]; |
| 47 | { |
| 48 | register i, r; |
| 49 | register char *arg; |
| 50 | char *dest; |
| 51 | |
| 52 | if (argc < 2) |
| 53 | goto usage; |
| 54 | while (argc > 1 && *argv[1] == '-') { |
| 55 | argc--; |
| 56 | arg = *++argv; |
| 57 | |
| 58 | /* |
| 59 | * all files following a null option |
| 60 | * are considered file names |
| 61 | */ |
| 62 | if (*(arg+1) == '\0') |
| 63 | break; |
| 64 | while (*++arg != '\0') switch (*arg) { |
| 65 | |
| 66 | case 'i': |
| 67 | iflag++; |
| 68 | break; |
| 69 | |
| 70 | case 'f': |
| 71 | fflag++; |
| 72 | break; |
| 73 | |
| 74 | default: |
| 75 | goto usage; |
| 76 | } |
| 77 | } |
| 78 | if (argc < 3) |
| 79 | goto usage; |
| 80 | dest = argv[argc-1]; |
| 81 | if (stat(dest, &s2) >= 0 && ISDIR(s2)) { |
| 82 | r = 0; |
| 83 | for (i = 1; i < argc-1; i++) |
| 84 | r |= movewithshortname(argv[i], dest); |
| 85 | exit(r); |
| 86 | } |
| 87 | if (argc > 3) |
| 88 | goto usage; |
| 89 | r = move(argv[1], argv[2]); |
| 90 | exit(r); |
| 91 | /*NOTREACHED*/ |
| 92 | usage: |
| 93 | fprintf(stderr, |
| 94 | "usage: mv [-if] f1 f2 or mv [-if] f1 ... fn d1 (`fn' is a file or directory)\n"); |
| 95 | return (1); |
| 96 | } |
| 97 | |
| 98 | movewithshortname(src, dest) |
| 99 | char *src, *dest; |
| 100 | { |
| 101 | register char *shortname; |
| 102 | char target[MAXPATHLEN + 1]; |
| 103 | |
| 104 | shortname = dname(src); |
| 105 | if (strlen(dest) + strlen(shortname) > MAXPATHLEN - 1) { |
| 106 | error("%s/%s: pathname too long", dest, |
| 107 | shortname); |
| 108 | return (1); |
| 109 | } |
| 110 | sprintf(target, "%s/%s", dest, shortname); |
| 111 | return (move(src, target)); |
| 112 | } |
| 113 | |
| 114 | move(source, target) |
| 115 | char *source, *target; |
| 116 | { |
| 117 | int targetexists; |
| 118 | |
| 119 | if (lstat(source, &s1) < 0) { |
| 120 | Perror2(source, "Cannot access"); |
| 121 | return (1); |
| 122 | } |
| 123 | /* |
| 124 | * First, try to rename source to destination. |
| 125 | * The only reason we continue on failure is if |
| 126 | * the move is on a nondirectory and not across |
| 127 | * file systems. |
| 128 | */ |
| 129 | targetexists = lstat(target, &s2) >= 0; |
| 130 | if (targetexists) { |
| 131 | if (s1.st_dev == s2.st_dev && s1.st_ino == s2.st_ino) { |
| 132 | error("%s and %s are identical", source, target); |
| 133 | return (1); |
| 134 | } |
| 135 | if (iflag && !fflag && isatty(fileno(stdin)) && |
| 136 | query("remove %s? ", target) == 0) |
| 137 | return (1); |
| 138 | if (access(target, 2) < 0 && !fflag && isatty(fileno(stdin))) { |
| 139 | if (query("override protection %o for %s? ", |
| 140 | s2.st_mode & MODEBITS, target) == 0) |
| 141 | return (1); |
| 142 | } |
| 143 | } |
| 144 | if (rename(source, target) >= 0) |
| 145 | return (0); |
| 146 | if (errno != EXDEV) { |
| 147 | Perror2(errno == ENOENT && targetexists == 0 ? target : source, |
| 148 | "rename"); |
| 149 | return (1); |
| 150 | } |
| 151 | if (ISDIR(s1)) { |
| 152 | error("can't mv directories across file systems"); |
| 153 | return (1); |
| 154 | } |
| 155 | if (targetexists && unlink(target) < 0) { |
| 156 | Perror2(target, "Cannot unlink"); |
| 157 | return (1); |
| 158 | } |
| 159 | /* |
| 160 | * File can't be renamed, try to recreate the symbolic |
| 161 | * link or special device, or copy the file wholesale |
| 162 | * between file systems. |
| 163 | */ |
| 164 | if (ISLNK(s1)) { |
| 165 | register m; |
| 166 | char symln[MAXPATHLEN + 1]; |
| 167 | |
| 168 | m = readlink(source, symln, sizeof (symln) - 1); |
| 169 | if (m < 0) { |
| 170 | Perror(source); |
| 171 | return (1); |
| 172 | } |
| 173 | symln[m] = '\0'; |
| 174 | |
| 175 | m = umask(~(s1.st_mode & MODEBITS)); |
| 176 | if (symlink(symln, target) < 0) { |
| 177 | Perror(target); |
| 178 | return (1); |
| 179 | } |
| 180 | (void) umask(m); |
| 181 | goto cleanup; |
| 182 | } |
| 183 | if (ISDEV(s1)) { |
| 184 | struct timeval tv[2]; |
| 185 | |
| 186 | if (mknod(target, s1.st_mode, s1.st_rdev) < 0) { |
| 187 | Perror(target); |
| 188 | return (1); |
| 189 | } |
| 190 | |
| 191 | tv[0].tv_sec = s1.st_atime; |
| 192 | tv[0].tv_usec = 0; |
| 193 | tv[1].tv_sec = s1.st_mtime; |
| 194 | tv[1].tv_usec = 0; |
| 195 | (void) utimes(target, tv); |
| 196 | goto cleanup; |
| 197 | } |
| 198 | if (ISREG(s1)) { |
| 199 | register int fi, fo, n; |
| 200 | struct timeval tv[2]; |
| 201 | char buf[MAXBSIZE]; |
| 202 | |
| 203 | fi = open(source, 0); |
| 204 | if (fi < 0) { |
| 205 | Perror(source); |
| 206 | return (1); |
| 207 | } |
| 208 | |
| 209 | fo = creat(target, s1.st_mode & MODEBITS); |
| 210 | if (fo < 0) { |
| 211 | Perror(target); |
| 212 | close(fi); |
| 213 | return (1); |
| 214 | } |
| 215 | |
| 216 | for (;;) { |
| 217 | n = read(fi, buf, sizeof buf); |
| 218 | if (n == 0) { |
| 219 | break; |
| 220 | } else if (n < 0) { |
| 221 | Perror2(source, "read"); |
| 222 | close(fi); |
| 223 | close(fo); |
| 224 | return (1); |
| 225 | } else if (write(fo, buf, n) != n) { |
| 226 | Perror2(target, "write"); |
| 227 | close(fi); |
| 228 | close(fo); |
| 229 | return (1); |
| 230 | } |
| 231 | } |
| 232 | |
| 233 | close(fi); |
| 234 | close(fo); |
| 235 | |
| 236 | tv[0].tv_sec = s1.st_atime; |
| 237 | tv[0].tv_usec = 0; |
| 238 | tv[1].tv_sec = s1.st_mtime; |
| 239 | tv[1].tv_usec = 0; |
| 240 | (void) utimes(target, tv); |
| 241 | goto cleanup; |
| 242 | } |
| 243 | error("%s: unknown file type %o", source, s1.st_mode); |
| 244 | return (1); |
| 245 | |
| 246 | cleanup: |
| 247 | if (unlink(source) < 0) { |
| 248 | Perror2(source, "Cannot unlink"); |
| 249 | return (1); |
| 250 | } |
| 251 | return (0); |
| 252 | } |
| 253 | |
| 254 | /*VARARGS*/ |
| 255 | query(prompt, a1, a2) |
| 256 | char *a1; |
| 257 | { |
| 258 | register int i, c; |
| 259 | |
| 260 | fprintf(stderr, prompt, a1, a2); |
| 261 | i = c = getchar(); |
| 262 | while (c != '\n' && c != EOF) |
| 263 | c = getchar(); |
| 264 | return (i == 'y'); |
| 265 | } |
| 266 | |
| 267 | char * |
| 268 | dname(name) |
| 269 | register char *name; |
| 270 | { |
| 271 | register char *p; |
| 272 | |
| 273 | p = name; |
| 274 | while (*p) |
| 275 | if (*p++ == DELIM && *p) |
| 276 | name = p; |
| 277 | return name; |
| 278 | } |
| 279 | |
| 280 | /*VARARGS*/ |
| 281 | error(fmt, a1, a2) |
| 282 | char *fmt; |
| 283 | { |
| 284 | |
| 285 | fprintf(stderr, "mv: "); |
| 286 | fprintf(stderr, fmt, a1, a2); |
| 287 | fprintf(stderr, "\n"); |
| 288 | } |
| 289 | |
| 290 | Perror(s) |
| 291 | char *s; |
| 292 | { |
| 293 | char buf[MAXPATHLEN + 10]; |
| 294 | |
| 295 | sprintf(buf, "mv: %s", s); |
| 296 | perror(buf); |
| 297 | } |
| 298 | |
| 299 | Perror2(s1, s2) |
| 300 | char *s1, *s2; |
| 301 | { |
| 302 | char buf[MAXPATHLEN + 20]; |
| 303 | |
| 304 | sprintf(buf, "mv: %s: %s", s1, s2); |
| 305 | perror(buf); |
| 306 | } |