xinstall.c revision 1.9
1 /* $NetBSD: xinstall.c,v 1.9 1995/12/20 10:25:17 jonathan Exp $ */ 2 3 /* 4 * Copyright (c) 1987, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef lint 37 static char copyright[] = 38 "@(#) Copyright (c) 1987, 1993\n\ 39 The Regents of the University of California. All rights reserved.\n"; 40 #endif /* not lint */ 41 42 #ifndef lint 43 #if 0 44 static char sccsid[] = "@(#)xinstall.c 8.1 (Berkeley) 7/21/93"; 45 #endif 46 static char rcsid[] = "$NetBSD: xinstall.c,v 1.9 1995/12/20 10:25:17 jonathan Exp $"; 47 #endif /* not lint */ 48 49 #include <sys/param.h> 50 #include <sys/wait.h> 51 #include <sys/mman.h> 52 #include <sys/stat.h> 53 54 #include <ctype.h> 55 #include <errno.h> 56 #include <fcntl.h> 57 #include <grp.h> 58 #include <paths.h> 59 #include <pwd.h> 60 #include <stdio.h> 61 #include <stdlib.h> 62 #include <string.h> 63 #include <unistd.h> 64 #include <err.h> 65 66 #include "pathnames.h" 67 68 struct passwd *pp; 69 struct group *gp; 70 int docopy, dodir, dostrip; 71 int mode = S_IRWXU|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 72 char pathbuf[MAXPATHLEN]; 73 uid_t uid; 74 gid_t gid; 75 76 #define DIRECTORY 0x01 /* Tell install it's a directory. */ 77 #define SETFLAGS 0x02 /* Tell install to set flags. */ 78 79 void copy __P((int, char *, int, char *, off_t)); 80 void install __P((char *, char *, u_long, u_int)); 81 void install_dir __P((char *)); 82 u_long string_to_flags __P((char **, u_long *, u_long *)); 83 void strip __P((char *)); 84 void usage __P((void)); 85 86 int 87 main(argc, argv) 88 int argc; 89 char *argv[]; 90 { 91 struct stat from_sb, to_sb; 92 mode_t *set; 93 u_long fset; 94 u_int iflags; 95 int ch, no_target; 96 char *flags, *to_name, *group = NULL, *owner = NULL; 97 98 iflags = 0; 99 while ((ch = getopt(argc, argv, "cf:g:m:o:sd")) != EOF) 100 switch((char)ch) { 101 case 'c': 102 docopy = 1; 103 break; 104 case 'f': 105 flags = optarg; 106 if (string_to_flags(&flags, &fset, NULL)) 107 errx(1, "%s: invalid flag", flags); 108 iflags |= SETFLAGS; 109 break; 110 case 'g': 111 group = optarg; 112 break; 113 case 'm': 114 if (!(set = setmode(optarg))) 115 errx(1, "%s: invalid file mode", optarg); 116 mode = getmode(set, 0); 117 break; 118 case 'o': 119 owner = optarg; 120 break; 121 case 's': 122 dostrip = 1; 123 break; 124 case 'd': 125 dodir = 1; 126 break; 127 case '?': 128 default: 129 usage(); 130 } 131 argc -= optind; 132 argv += optind; 133 134 /* copy and strip options make no sense when creating directories */ 135 if ((docopy || dostrip) && dodir) 136 usage(); 137 138 /* must have at least two arguments, except when creating directories */ 139 if (argc < 2 && !dodir) 140 usage(); 141 142 /* get group and owner id's */ 143 if (group && !(gp = getgrnam(group)) && !isdigit(*group)) 144 errx(1, "unknown group %s", group); 145 gid = (group) ? ((gp) ? gp->gr_gid : atoi(group)) : -1; 146 if (owner && !(pp = getpwnam(owner)) && !isdigit(*owner)) 147 errx(1, "unknown user %s", owner); 148 uid = (owner) ? ((pp) ? pp->pw_uid : atoi(owner)) : -1; 149 150 if (dodir) { 151 for (; *argv != NULL; ++argv) 152 install_dir(*argv); 153 exit (0); 154 /* NOTREACHED */ 155 } 156 157 no_target = stat(to_name = argv[argc - 1], &to_sb); 158 if (!no_target && S_ISDIR(to_sb.st_mode)) { 159 for (; *argv != to_name; ++argv) 160 install(*argv, to_name, fset, iflags | DIRECTORY); 161 exit(0); 162 } 163 164 /* can't do file1 file2 directory/file */ 165 if (argc != 2) 166 usage(); 167 168 if (!no_target) { 169 if (stat(*argv, &from_sb)) 170 err(1, "%s", *argv); 171 if (!S_ISREG(to_sb.st_mode)) 172 errx(1, "%s: %s", to_name, strerror(EFTYPE)); 173 if (to_sb.st_dev == from_sb.st_dev && 174 to_sb.st_ino == from_sb.st_ino) 175 errx(1, "%s and %s are the same file", *argv, to_name); 176 /* 177 * Unlink now... avoid ETXTBSY errors later. Try and turn 178 * off the append/immutable bits -- if we fail, go ahead, 179 * it might work. 180 */ 181 #define NOCHANGEBITS (UF_IMMUTABLE | UF_APPEND | SF_IMMUTABLE | SF_APPEND) 182 if (to_sb.st_flags & NOCHANGEBITS) 183 (void)chflags(to_name, 184 to_sb.st_flags & ~(NOCHANGEBITS)); 185 (void)unlink(to_name); 186 } 187 install(*argv, to_name, fset, iflags); 188 exit(0); 189 } 190 191 /* 192 * install -- 193 * build a path name and install the file 194 */ 195 void 196 install(from_name, to_name, fset, flags) 197 char *from_name, *to_name; 198 u_long fset; 199 u_int flags; 200 { 201 struct stat from_sb, to_sb; 202 int devnull, from_fd, to_fd, serrno; 203 char *p; 204 205 /* If try to install NULL file to a directory, fails. */ 206 if (flags & DIRECTORY || strcmp(from_name, _PATH_DEVNULL)) { 207 if (stat(from_name, &from_sb)) 208 err(1, "%s", from_name); 209 if (!S_ISREG(from_sb.st_mode)) 210 errx(1, "%s: %s", from_name, strerror(EFTYPE)); 211 /* Build the target path. */ 212 if (flags & DIRECTORY) { 213 (void)snprintf(pathbuf, sizeof(pathbuf), "%s/%s", 214 to_name, 215 (p = rindex(from_name, '/')) ? ++p : from_name); 216 to_name = pathbuf; 217 } 218 devnull = 0; 219 } else { 220 from_sb.st_flags = 0; /* XXX */ 221 devnull = 1; 222 } 223 224 /* 225 * Unlink now... avoid ETXTBSY errors later. Try and turn 226 * off the append/immutable bits -- if we fail, go ahead, 227 * it might work. 228 */ 229 if (stat(to_name, &to_sb) == 0 && 230 to_sb.st_flags & (NOCHANGEBITS)) 231 (void)chflags(to_name, to_sb.st_flags & ~(NOCHANGEBITS)); 232 (void)unlink(to_name); 233 234 /* Create target. */ 235 if ((to_fd = open(to_name, 236 O_CREAT | O_WRONLY | O_TRUNC, S_IRUSR | S_IWUSR)) < 0) 237 err(1, "%s", to_name); 238 if (!devnull) { 239 if ((from_fd = open(from_name, O_RDONLY, 0)) < 0) { 240 (void)unlink(to_name); 241 err(1, "%s", from_name); 242 } 243 copy(from_fd, from_name, to_fd, to_name, from_sb.st_size); 244 (void)close(from_fd); 245 } 246 247 if (dostrip) { 248 strip(to_name); 249 250 /* 251 * Re-open our fd on the target, in case we used a strip 252 * that does not work in-place -- like gnu binutils strip. 253 */ 254 close(to_fd); 255 if ((to_fd = open(to_name, O_RDONLY, S_IRUSR | S_IWUSR)) < 0) 256 err(1, "stripping %s", to_name); 257 } 258 259 /* 260 * Set owner, group, mode for target; do the chown first, 261 * chown may lose the setuid bits. 262 */ 263 if ((gid != -1 || uid != -1) && fchown(to_fd, uid, gid)) { 264 serrno = errno; 265 (void)unlink(to_name); 266 errx(1, "%s: chown/chgrp: %s", to_name, strerror(serrno)); 267 } 268 if (fchmod(to_fd, mode)) { 269 serrno = errno; 270 (void)unlink(to_name); 271 errx(1, "%s: chmod: %s", to_name, strerror(serrno)); 272 } 273 274 /* 275 * If provided a set of flags, set them, otherwise, preserve the 276 * flags, except for the dump flag. 277 */ 278 if (fchflags(to_fd, 279 flags & SETFLAGS ? fset : from_sb.st_flags & ~UF_NODUMP)) { 280 serrno = errno; 281 (void)unlink(to_name); 282 errx(1, "%s: chflags: %s", to_name, strerror(serrno)); 283 } 284 285 (void)close(to_fd); 286 if (!docopy && !devnull && unlink(from_name)) 287 err(1, "%s", from_name); 288 } 289 290 /* 291 * copy -- 292 * copy from one file to another 293 */ 294 void 295 copy(from_fd, from_name, to_fd, to_name, size) 296 register int from_fd, to_fd; 297 char *from_name, *to_name; 298 off_t size; 299 { 300 register int nr, nw; 301 int serrno; 302 char *p, buf[MAXBSIZE]; 303 304 /* 305 * Mmap and write if less than 8M (the limit is so we don't totally 306 * trash memory on big files. This is really a minor hack, but it 307 * wins some CPU back. 308 */ 309 if (size <= 8 * 1048576) { 310 if ((p = mmap(NULL, (size_t)size, PROT_READ, 311 0, from_fd, (off_t)0)) == (char *)-1) 312 err(1, "%s", from_name); 313 if (write(to_fd, p, size) != size) 314 err(1, "%s", to_name); 315 } else { 316 while ((nr = read(from_fd, buf, sizeof(buf))) > 0) 317 if ((nw = write(to_fd, buf, nr)) != nr) { 318 serrno = errno; 319 (void)unlink(to_name); 320 errx(1, "%s: %s", 321 to_name, strerror(nw > 0 ? EIO : serrno)); 322 } 323 if (nr != 0) { 324 serrno = errno; 325 (void)unlink(to_name); 326 errx(1, "%s: %s", from_name, strerror(serrno)); 327 } 328 } 329 } 330 331 /* 332 * strip -- 333 * use strip(1) to strip the target file 334 */ 335 void 336 strip(to_name) 337 char *to_name; 338 { 339 int serrno, status; 340 341 switch (vfork()) { 342 case -1: 343 serrno = errno; 344 (void)unlink(to_name); 345 errx(1, "forks: %s", strerror(errno)); 346 case 0: 347 execl(_PATH_STRIP, "strip", to_name, NULL); 348 err(1, "%s", _PATH_STRIP); 349 default: 350 if (wait(&status) == -1 || status) 351 (void)unlink(to_name); 352 } 353 } 354 355 /* 356 * install_dir -- 357 * build directory heirarchy 358 */ 359 void 360 install_dir(path) 361 char *path; 362 { 363 register char *p; 364 struct stat sb; 365 int ch; 366 367 for (p = path;; ++p) 368 if (!*p || (p != path && *p == '/')) { 369 ch = *p; 370 *p = '\0'; 371 if (stat(path, &sb)) { 372 if (errno != ENOENT || mkdir(path, 0777) < 0) { 373 err(1, "%s", path); 374 /* NOTREACHED */ 375 } 376 } 377 if (!(*p = ch)) 378 break; 379 } 380 381 if (((gid != -1 || uid != -1) && chown(path, uid, gid)) || 382 chmod(path, mode)) { 383 warn("%s", path); 384 } 385 } 386 387 /* 388 * usage -- 389 * print a usage message and die 390 */ 391 void 392 usage() 393 { 394 (void)fprintf(stderr, "\ 395 usage: install [-cs] [-f flags] [-g group] [-m mode] [-o owner] file1 file2\n\ 396 install [-cs] [-f flags] [-g group] [-m mode] [-o owner] file1 ... fileN directory\n\ 397 install -d [-g group] [-m mode] [-o owner] directory ...\n"); 398 exit(1); 399 } 400
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