src/kmk/kmkbuiltin/install.c

   1 /*
   2  * Copyright (c) 1987, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #ifndef lint
  35 static const char copyright[] =
  36 "@(#) Copyright (c) 1987, 1993\n\
  37         The Regents of the University of California.  All rights reserved.\n";
  38 #endif /* not lint */
  39
  40 #if 0
  41 #ifndef lint
  42 static char sccsid[] = "@(#)xinstall.c  8.1 (Berkeley) 7/21/93";
  43 #endif /* not lint */
  44
  45 #include <sys/cdefs.h>
  46 __FBSDID("$FreeBSD: src/usr.bin/xinstall/xinstall.c,v 1.66 2005/01/25 14:34:57 ssouhlal Exp $");
  47 #endif
  48
  49 #ifndef _MSC_VER
  50 # include <sys/param.h>
  51 # ifdef USE_MMAP
  52 #  include <sys/mman.h>
  53 # endif
  54 # include <sys/mount.h>
  55 # include <sys/wait.h>
  56 # include <sys/time.h>
  57 #endif /* !_MSC_VER */
  58 #include <sys/stat.h>
  59
  60 #include <ctype.h>
  61 #include "err.h"
  62 #include <errno.h>
  63 #include <fcntl.h>
  64 #include <grp.h>
  65 #include <paths.h>
  66 #include <pwd.h>
  67 #include <stdio.h>
  68 #include <stdlib.h>
  69 #include <string.h>
  70 #include <sysexits.h>
  71 #include <unistd.h>
  72 #if defined(__EMX__) || defined(_MSC_VER)
  73 # include <process.h>
  74 #endif
  75 #include "getopt.h"
  76 #ifdef __sun__
  77 # include "solfakes.h"
  78 #endif
  79 #ifdef _MSC_VER
  80 # include "mscfakes.h"
  81 #endif
  82 #include "kmkbuiltin.h"
  83
  84
  85 extern void * bsd_setmode(const char *p);
  86 extern mode_t bsd_getmode(const void *bbox, mode_t omode);
  87
  88 #ifndef __unused
  89 # define __unused
  90 #endif
  91
  92 #ifndef MAXBSIZE
  93 # define MAXBSIZE 0x20000
  94 #endif
  95
  96 /* Bootstrap aid - this doesn't exist in most older releases */
  97 #ifndef MAP_FAILED
  98 #define MAP_FAILED ((void *)-1) /* from <sys/mman.h> */
  99 #endif
 100
 101 #define MAX_CMP_SIZE    (16 * 1024 * 1024)
 102
 103 #define DIRECTORY       0x01            /* Tell install it's a directory. */
 104 #define SETFLAGS        0x02            /* Tell install to set flags. */
 105 #define NOCHANGEBITS    (UF_IMMUTABLE | UF_APPEND | SF_IMMUTABLE | SF_APPEND)
 106 #define BACKUP_SUFFIX   ".old"
 107
 108 #ifndef O_BINARY
 109 # define O_BINARY 0
 110 #endif
 111
 112 #ifndef EFTYPE
 113 # define EFTYPE EINVAL
 114 #endif
 115
 116 #if defined(__WIN32__) || defined(__WIN64__) || defined(__OS2__)
 117 # define IS_SLASH(ch)   ((ch) == '/' || (ch) == '\\')
 118 #else
 119 # define IS_SLASH(ch)   ((ch) == '/')
 120 #endif
 121
 122 static gid_t gid;
 123 static uid_t uid;
 124 static int dobackup, docompare, dodir, dopreserve, dostrip, nommap, safecopy, verbose;
 125 static mode_t mode = S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH;
 126 static const char *suffix = BACKUP_SUFFIX;
 127
 128 static struct option long_options[] =
 129 {
 130     { "help",                                           no_argument, 0, 261 },
 131     { "version",                                        no_argument, 0, 262 },
 132     { 0, 0,     0, 0 },
 133 };
 134
 135
 136 static int      copy(int, const char *, int, const char *, off_t);
 137 static int      compare(int, const char *, size_t, int, const char *, size_t);
 138 static int      create_newfile(const char *, int, struct stat *);
 139 static int      create_tempfile(const char *, char *, size_t);
 140 static int      install(const char *, const char *, u_long, u_int);
 141 static int      install_dir(char *);
 142 static u_long   numeric_id(const char *, const char *);
 143 static int      strip(const char *);
 144 #ifdef USE_MMAP
 145 static int      trymmap(int);
 146 #endif
 147 static int      usage(FILE *);
 148 static char    *last_slash(const char *);
 149
 150 int
 151 kmk_builtin_install(int argc, char *argv[], char **envp)
 152 {
 153         struct stat from_sb, to_sb;
 154         mode_t *set;
 155         u_long fset = 0;
 156         int ch, no_target;
 157         u_int iflags;
 158         char *flags;
 159         const char *group, *owner, *to_name;
 160
 161         /* reinitialize globals */
 162         mode = S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH;
 163         suffix = BACKUP_SUFFIX;
 164         gid = 0;
 165         uid = 0;
 166         dobackup = docompare = dodir = dopreserve = dostrip = nommap = safecopy = verbose = 0;
 167
 168         /* reset getopt and set progname. */
 169         g_progname = argv[0];
 170         opterr = 1;
 171         optarg = NULL;
 172         optopt = 0;
 173         optind = 0; /* init */
 174
 175         iflags = 0;
 176         group = owner = NULL;
 177         while ((ch = getopt_long(argc, argv, "B:bCcdf:g:Mm:o:pSsv", long_options, NULL)) != -1)
 178                 switch(ch) {
 179                 case 'B':
 180                         suffix = optarg;
 181                         /* FALLTHROUGH */
 182                 case 'b':
 183                         dobackup = 1;
 184                         break;
 185                 case 'C':
 186                         docompare = 1;
 187                         break;
 188                 case 'c':
 189                         /* For backwards compatibility. */
 190                         break;
 191                 case 'd':
 192                         dodir = 1;
 193                         break;
 194                 case 'f':
 195 #ifdef UF_IMMUTABLE
 196                         flags = optarg;
 197                         if (strtofflags(&flags, &fset, NULL))
 198                                 return errx(EX_USAGE, "%s: invalid flag", flags);
 199                         iflags |= SETFLAGS;
 200 #else
 201                         (void)flags;
 202 #endif
 203                         break;
 204                 case 'g':
 205                         group = optarg;
 206                         break;
 207                 case 'M':
 208                         nommap = 1;
 209                         break;
 210                 case 'm':
 211                         if (!(set = bsd_setmode(optarg)))
 212                                 return errx(EX_USAGE, "invalid file mode: %s",
 213                                             optarg);
 214                         mode = bsd_getmode(set, 0);
 215                         free(set);
 216                         break;
 217                 case 'o':
 218                         owner = optarg;
 219                         break;
 220                 case 'p':
 221                         docompare = dopreserve = 1;
 222                         break;
 223                 case 'S':
 224                         safecopy = 1;
 225                         break;
 226                 case 's':
 227                         dostrip = 1;
 228                         break;
 229                 case 'v':
 230                         verbose = 1;
 231                         break;
 232                 case 261:
 233                         usage(stdout);
 234                         return 0;
 235                 case 262:
 236                         return kbuild_version(argv[0]);
 237                 case '?':
 238                 default:
 239                         return usage(stderr);
 240                 }
 241         argc -= optind;
 242         argv += optind;
 243
 244         /* some options make no sense when creating directories */
 245         if (dostrip && dodir) {
 246                 warnx("-d and -s may not be specified together");
 247                 return usage(stderr);
 248         }
 249
 250         /* must have at least two arguments, except when creating directories */
 251         if (argc == 0 || (argc == 1 && !dodir))
 252                 return usage(stderr);
 253
 254         /* need to make a temp copy so we can compare stripped version */
 255         if (docompare && dostrip)
 256                 safecopy = 1;
 257
 258         /* get group and owner id's */
 259         if (group != NULL) {
 260 #ifndef _MSC_VER
 261                 struct group *gp;
 262                 if ((gp = getgrnam(group)) != NULL)
 263                         gid = gp->gr_gid;
 264                 else
 265 #endif
 266                 {
 267                         gid = (gid_t)numeric_id(group, "group");
 268                         if (gid == (gid_t)-1)
 269                                 return 1;
 270                 }
 271         } else
 272                 gid = (gid_t)-1;
 273
 274         if (owner != NULL) {
 275 #ifndef _MSC_VER
 276                 struct passwd *pp;
 277                 if ((pp = getpwnam(owner)) != NULL)
 278                         uid = pp->pw_uid;
 279                 else
 280 #endif
 281                 {
 282                         uid = (uid_t)numeric_id(owner, "user");
 283                         if (uid == (uid_t)-1)
 284                                 return 1;
 285                 }
 286         } else
 287                 uid = (uid_t)-1;
 288
 289         if (dodir) {
 290                 for (; *argv != NULL; ++argv) {
 291                         int rc = install_dir(*argv);
 292                         if (rc)
 293                                 return rc;
 294                 }
 295                 return EX_OK;
 296                 /* NOTREACHED */
 297         }
 298
 299         no_target = stat(to_name = argv[argc - 1], &to_sb);
 300         if (!no_target && S_ISDIR(to_sb.st_mode)) {
 301                 for (; *argv != to_name; ++argv) {
 302                         int rc = install(*argv, to_name, fset, iflags | DIRECTORY);
 303                         if (rc)
 304                                 return rc;
 305                 }
 306                 return EX_OK;
 307         }
 308
 309         /* can't do file1 file2 directory/file */
 310         if (argc != 2) {
 311                 warnx("wrong number or types of arguments");
 312                 return usage(stderr);
 313         }
 314
 315         if (!no_target) {
 316                 if (stat(*argv, &from_sb))
 317                         return err(EX_OSERR, "%s", *argv);
 318                 if (!S_ISREG(to_sb.st_mode)) {
 319                         errno = EFTYPE;
 320                         return err(EX_OSERR, "%s", to_name);
 321                 }
 322                 if (to_sb.st_dev == from_sb.st_dev &&
 323                     to_sb.st_dev != 0 &&
 324                     to_sb.st_ino == from_sb.st_ino &&
 325                     to_sb.st_ino != 0)
 326                         return errx(EX_USAGE,
 327                                     "%s and %s are the same file", *argv, to_name);
 328         }
 329         return install(*argv, to_name, fset, iflags);
 330 }
 331
 332 static u_long
 333 numeric_id(const char *name, const char *type)
 334 {
 335         u_long val;
 336         char *ep;
 337
 338         /*
 339          * XXX
 340          * We know that uid_t's and gid_t's are unsigned longs.
 341          */
 342         errno = 0;
 343         val = strtoul(name, &ep, 10);
 344         if (errno)
 345                 return err(-1, "%s", name);
 346         if (*ep != '\0')
 347                 return errx(-1, "unknown %s %s", type, name);
 348         return (val);
 349 }
 350
 351 /*
 352  * install --
 353  *      build a path name and install the file
 354  */
 355 static int
 356 install(const char *from_name, const char *to_name, u_long fset, u_int flags)
 357 {
 358         struct stat from_sb, temp_sb, to_sb;
 359         struct timeval tvb[2];
 360         int devnull, files_match, from_fd, serrno, target;
 361         int tempcopy, temp_fd, to_fd;
 362         char backup[MAXPATHLEN], *p, pathbuf[MAXPATHLEN], tempfile[MAXPATHLEN];
 363         int rc = EX_OK;
 364
 365         files_match = 0;
 366         from_fd = -1;
 367         to_fd = -1;
 368         temp_fd = -1;
 369
 370         /* If try to install NULL file to a directory, fails. */
 371         if (flags & DIRECTORY
 372 #if defined(__EMX__) || defined(_MSC_VER)
 373             || (   stricmp(from_name, _PATH_DEVNULL)
 374                 && stricmp(from_name, "nul")
 375 #ifdef __EMX__
 376                 && stricmp(from_name, "/dev/nul")
 377 #endif
 378                )
 379 #else
 380             || strcmp(from_name, _PATH_DEVNULL)
 381 #endif
 382             ) {
 383                 if (stat(from_name, &from_sb))
 384                         return err(EX_OSERR, "%s", from_name);
 385                 if (!S_ISREG(from_sb.st_mode)) {
 386                         errno = EFTYPE;
 387                         return err(EX_OSERR, "%s", from_name);
 388                 }
 389                 /* Build the target path. */
 390                 if (flags & DIRECTORY) {
 391                         (void)snprintf(pathbuf, sizeof(pathbuf), "%s/%s",
 392                             to_name,
 393                             (p = last_slash(from_name)) ? ++p : from_name);
 394                         to_name = pathbuf;
 395                 }
 396                 devnull = 0;
 397         } else {
 398                 devnull = 1;
 399         }
 400
 401         target = stat(to_name, &to_sb) == 0;
 402
 403         /* Only install to regular files. */
 404         if (target && !S_ISREG(to_sb.st_mode)) {
 405                 errno = EFTYPE;
 406                 warn("%s", to_name);
 407                 return EX_OK;
 408         }
 409
 410         /* Only copy safe if the target exists. */
 411         tempcopy = safecopy && target;
 412
 413         if (!devnull && (from_fd = open(from_name, O_RDONLY | O_BINARY, 0)) < 0)
 414                 return err(EX_OSERR, "%s", from_name);
 415
 416         /* If we don't strip, we can compare first. */
 417         if (docompare && !dostrip && target) {
 418                 if ((to_fd = open(to_name, O_RDONLY | O_BINARY, 0)) < 0) {
 419                         rc = err(EX_OSERR, "%s", to_name);
 420                         goto l_done;
 421                 }
 422                 if (devnull)
 423                         files_match = to_sb.st_size == 0;
 424                 else
 425                         files_match = !(compare(from_fd, from_name,
 426                             (size_t)from_sb.st_size, to_fd,
 427                             to_name, (size_t)to_sb.st_size));
 428
 429                 /* Close "to" file unless we match. */
 430                 if (!files_match) {
 431                         (void)close(to_fd);
 432                         to_fd = -1;
 433                 }
 434         }
 435
 436         if (!files_match) {
 437                 if (tempcopy) {
 438                         to_fd = create_tempfile(to_name, tempfile,
 439                             sizeof(tempfile));
 440                         if (to_fd < 0) {
 441                                 rc = err(EX_OSERR, "%s", tempfile);
 442                                 goto l_done;
 443                         }
 444                 } else {
 445                         if ((to_fd = create_newfile(to_name, target,
 446                             &to_sb)) < 0) {
 447                                 rc = err(EX_OSERR, "%s", to_name);
 448                                 goto l_done;
 449                         }
 450                         if (verbose)
 451                                 (void)printf("install: %s -> %s\n",
 452                                     from_name, to_name);
 453                 }
 454                 if (!devnull) {
 455                         rc = copy(from_fd, from_name, to_fd,
 456                                   tempcopy ? tempfile : to_name, from_sb.st_size);
 457                         if (rc)
 458                                 goto l_done;
 459                 }
 460         }
 461
 462         if (dostrip) {
 463 #if defined(__EMX__) || defined(_MSC_VER)
 464                 /* close before we strip. */
 465                 close(to_fd);
 466                 to_fd = -1;
 467 #endif
 468                 rc = strip(tempcopy ? tempfile : to_name);
 469                 if (rc)
 470                         goto l_done;
 471
 472                 /*
 473                  * Re-open our fd on the target, in case we used a strip
 474                  * that does not work in-place -- like GNU binutils strip.
 475                  */
 476 #if !defined(__EMX__) && !defined(_MSC_VER)
 477                 close(to_fd);
 478 #endif
 479                 to_fd = open(tempcopy ? tempfile : to_name, O_RDONLY | O_BINARY, 0);
 480                 if (to_fd < 0) {
 481                         rc = err(EX_OSERR, "stripping %s", to_name);
 482                         goto l_done;
 483                 }
 484         }
 485
 486         /*
 487          * Compare the stripped temp file with the target.
 488          */
 489         if (docompare && dostrip && target) {
 490                 temp_fd = to_fd;
 491
 492                 /* Re-open to_fd using the real target name. */
 493                 if ((to_fd = open(to_name, O_RDONLY | O_BINARY, 0)) < 0) {
 494                         rc = err(EX_OSERR, "%s", to_name);
 495                         goto l_done;
 496                 }
 497
 498                 if (fstat(temp_fd, &temp_sb)) {
 499                         serrno = errno;
 500                         (void)unlink(tempfile);
 501                         errno = serrno;
 502                         rc = err(EX_OSERR, "%s", tempfile);
 503                         goto l_done;
 504                 }
 505
 506                 if (compare(temp_fd, tempfile, (size_t)temp_sb.st_size, to_fd,
 507                             to_name, (size_t)to_sb.st_size) == 0) {
 508                         /*
 509                          * If target has more than one link we need to
 510                          * replace it in order to snap the extra links.
 511                          * Need to preserve target file times, though.
 512                          */
 513 #if !defined(_MSC_VER) && !defined(__EMX__)
 514                         if (to_sb.st_nlink != 1) {
 515                                 tvb[0].tv_sec = to_sb.st_atime;
 516                                 tvb[0].tv_usec = 0;
 517                                 tvb[1].tv_sec = to_sb.st_mtime;
 518                                 tvb[1].tv_usec = 0;
 519                                 (void)utimes(tempfile, tvb);
 520                         } else
 521 #endif
 522                         {
 523
 524                                 files_match = 1;
 525                                 (void)unlink(tempfile);
 526                         }
 527                         (void) close(temp_fd);
 528                         temp_fd = -1;
 529                 }
 530         }
 531
 532         /*
 533          * Move the new file into place if doing a safe copy
 534          * and the files are different (or just not compared).
 535          */
 536         if (tempcopy && !files_match) {
 537 #ifdef UF_IMMUTABLE
 538                 /* Try to turn off the immutable bits. */
 539                 if (to_sb.st_flags & NOCHANGEBITS)
 540                         (void)chflags(to_name, to_sb.st_flags & ~NOCHANGEBITS);
 541 #endif
 542                 if (dobackup) {
 543                         if ((size_t)snprintf(backup, MAXPATHLEN, "%s%s", to_name,
 544                             suffix) != strlen(to_name) + strlen(suffix)) {
 545                                 unlink(tempfile);
 546                                 rc = errx(EX_OSERR, "%s: backup filename too long",
 547                                           to_name);
 548                                 goto l_done;
 549                         }
 550                         if (verbose)
 551                                 (void)printf("install: %s -> %s\n", to_name, backup);
 552                         if (rename(to_name, backup) < 0) {
 553                                 serrno = errno;
 554                                 unlink(tempfile);
 555                                 errno = serrno;
 556                                 rc = err(EX_OSERR, "rename: %s to %s", to_name,
 557                                          backup);
 558                                 goto l_done;
 559                         }
 560                 }
 561                 if (verbose)
 562                         (void)printf("install: %s -> %s\n", from_name, to_name);
 563                 if (rename(tempfile, to_name) < 0) {
 564                         serrno = errno;
 565                         unlink(tempfile);
 566                         errno = serrno;
 567                         rc = err(EX_OSERR, "rename: %s to %s",
 568                                  tempfile, to_name);
 569                         goto l_done;
 570                 }
 571
 572                 /* Re-open to_fd so we aren't hosed by the rename(2). */
 573                 (void) close(to_fd);
 574                 if ((to_fd = open(to_name, O_RDONLY | O_BINARY, 0)) < 0) {
 575                         rc = err(EX_OSERR, "%s", to_name);
 576                         goto l_done;
 577                 }
 578         }
 579
 580         /*
 581          * Preserve the timestamp of the source file if necessary.
 582          */
 583         if (dopreserve && !files_match && !devnull) {
 584                 tvb[0].tv_sec = from_sb.st_atime;
 585                 tvb[0].tv_usec = 0;
 586                 tvb[1].tv_sec = from_sb.st_mtime;
 587                 tvb[1].tv_usec = 0;
 588                 (void)utimes(to_name, tvb);
 589         }
 590
 591         if (fstat(to_fd, &to_sb) == -1) {
 592                 serrno = errno;
 593                 (void)unlink(to_name);
 594                 errno = serrno;
 595                 rc = err(EX_OSERR, "%s", to_name);
 596                 goto l_done;
 597         }
 598
 599         /*
 600          * Set owner, group, mode for target; do the chown first,
 601          * chown may lose the setuid bits.
 602          */
 603 #ifdef UF_IMMUTABLE
 604         if ((gid != (gid_t)-1 && gid != to_sb.st_gid) ||
 605             (uid != (uid_t)-1 && uid != to_sb.st_uid) ||
 606             (mode != (to_sb.st_mode & ALLPERMS))) {
 607                 /* Try to turn off the immutable bits. */
 608                 if (to_sb.st_flags & NOCHANGEBITS)
 609                         (void)fchflags(to_fd, to_sb.st_flags & ~NOCHANGEBITS);
 610         }
 611 #endif
 612
 613         if ((gid != (gid_t)-1 && gid != to_sb.st_gid) ||
 614             (uid != (uid_t)-1 && uid != to_sb.st_uid))
 615                 if (fchown(to_fd, uid, gid) == -1) {
 616                         serrno = errno;
 617                         (void)unlink(to_name);
 618                         errno = serrno;
 619                         rc = err(EX_OSERR,"%s: chown/chgrp", to_name);
 620                         goto l_done;
 621                 }
 622
 623         if (mode != (to_sb.st_mode & ALLPERMS))
 624                 if (fchmod(to_fd, mode)) {
 625                         serrno = errno;
 626                         (void)unlink(to_name);
 627                         errno = serrno;
 628                         rc = err(EX_OSERR, "%s: chmod", to_name);
 629                         goto l_done;
 630                 }
 631
 632         /*
 633          * If provided a set of flags, set them, otherwise, preserve the
 634          * flags, except for the dump flag.
 635          * NFS does not support flags.  Ignore EOPNOTSUPP flags if we're just
 636          * trying to turn off UF_NODUMP.  If we're trying to set real flags,
 637          * then warn if the the fs doesn't support it, otherwise fail.
 638          */
 639 #ifdef UF_IMMUTABLE
 640         if (!devnull && (flags & SETFLAGS ||
 641             (from_sb.st_flags & ~UF_NODUMP) != to_sb.st_flags) &&
 642             fchflags(to_fd,
 643             flags & SETFLAGS ? fset : from_sb.st_flags & ~UF_NODUMP)) {
 644                 if (flags & SETFLAGS) {
 645                         if (errno == EOPNOTSUPP)
 646                                 warn("%s: chflags", to_name);
 647                         else {
 648                                 serrno = errno;
 649                                 (void)unlink(to_name);
 650                                 errno = serrno;
 651                                 rc = err(EX_OSERR, "%s: chflags", to_name);
 652                                 goto l_done;
 653                         }
 654                 }
 655         }
 656 #endif
 657
 658 l_done:
 659         if (to_fd >= 0)
 660                 (void)close(to_fd);
 661         if (temp_fd >= 0)
 662                 (void)close(temp_fd);
 663         if (!devnull)
 664                 (void)close(from_fd);
 665         return rc;
 666 }
 667
 668 /*
 669  * compare --
 670  *      compare two files; non-zero means files differ
 671  */
 672 static int
 673 compare(int from_fd, const char *from_name __unused, size_t from_len,
 674         int to_fd, const char *to_name __unused, size_t to_len)
 675 {
 676         char *p, *q;
 677         int rv;
 678         int done_compare;
 679
 680         rv = 0;
 681         if (from_len != to_len)
 682                 return 1;
 683
 684         if (from_len <= MAX_CMP_SIZE) {
 685 #ifdef USE_MMAP
 686                 done_compare = 0;
 687                 if (trymmap(from_fd) && trymmap(to_fd)) {
 688                         p = mmap(NULL, from_len, PROT_READ, MAP_SHARED, from_fd, (off_t)0);
 689                         if (p == (char *)MAP_FAILED)
 690                                 goto out;
 691                         q = mmap(NULL, from_len, PROT_READ, MAP_SHARED, to_fd, (off_t)0);
 692                         if (q == (char *)MAP_FAILED) {
 693                                 munmap(p, from_len);
 694                                 goto out;
 695                         }
 696
 697                         rv = memcmp(p, q, from_len);
 698                         munmap(p, from_len);
 699                         munmap(q, from_len);
 700                         done_compare = 1;
 701                 }
 702         out:
 703 #else
 704         (void)p; (void)q;
 705         done_compare = 0;
 706 #endif
 707                 if (!done_compare) {
 708                         char buf1[MAXBSIZE];
 709                         char buf2[MAXBSIZE];
 710                         int n1, n2;
 711
 712                         rv = 0;
 713                         lseek(from_fd, 0, SEEK_SET);
 714                         lseek(to_fd, 0, SEEK_SET);
 715                         while (rv == 0) {
 716                                 n1 = read(from_fd, buf1, sizeof(buf1));
 717                                 if (n1 == 0)
 718                                         break;          /* EOF */
 719                                 else if (n1 > 0) {
 720                                         n2 = read(to_fd, buf2, n1);
 721                                         if (n2 == n1)
 722                                                 rv = memcmp(buf1, buf2, n1);
 723                                         else
 724                                                 rv = 1; /* out of sync */
 725                                 } else
 726                                         rv = 1;         /* read failure */
 727                         }
 728                         lseek(from_fd, 0, SEEK_SET);
 729                         lseek(to_fd, 0, SEEK_SET);
 730                 }
 731         } else
 732                 rv = 1; /* don't bother in this case */
 733
 734         return rv;
 735 }
 736
 737 /*
 738  * create_tempfile --
 739  *      create a temporary file based on path and open it
 740  */
 741 int
 742 create_tempfile(const char *path, char *temp, size_t tsize)
 743 {
 744         char *p;
 745
 746         (void)strncpy(temp, path, tsize);
 747         temp[tsize - 1] = '\0';
 748         if ((p = last_slash(temp)) != NULL)
 749                 p++;
 750         else
 751                 p = temp;
 752         (void)strncpy(p, "INS@XXXX", &temp[tsize - 1] - p);
 753         temp[tsize - 1] = '\0';
 754         return (mkstemp(temp));
 755 }
 756
 757 /*
 758  * create_newfile --
 759  *      create a new file, overwriting an existing one if necessary
 760  */
 761 int
 762 create_newfile(const char *path, int target, struct stat *sbp)
 763 {
 764         char backup[MAXPATHLEN];
 765         int saved_errno = 0;
 766         int newfd;
 767
 768         if (target) {
 769                 /*
 770                  * Unlink now... avoid ETXTBSY errors later.  Try to turn
 771                  * off the append/immutable bits -- if we fail, go ahead,
 772                  * it might work.
 773                  */
 774 #ifdef UF_IMMUTABLE
 775                 if (sbp->st_flags & NOCHANGEBITS)
 776                         (void)chflags(path, sbp->st_flags & ~NOCHANGEBITS);
 777 #endif
 778
 779                 if (dobackup) {
 780                         if ((size_t)snprintf(backup, MAXPATHLEN, "%s%s",
 781                             path, suffix) != strlen(path) + strlen(suffix)) {
 782                                 errx(EX_OSERR, "%s: backup filename too long",
 783                                      path);
 784                                 errno = ENAMETOOLONG;
 785                                 return -1;
 786                         }
 787                         (void)snprintf(backup, MAXPATHLEN, "%s%s",
 788                             path, suffix);
 789                         if (verbose)
 790                                 (void)printf("install: %s -> %s\n",
 791                                     path, backup);
 792                         if (rename(path, backup) < 0) {
 793                                 err(EX_OSERR, "rename: %s to %s", path, backup);
 794                                 return -1;
 795                         }
 796                 } else
 797                         if (unlink(path) < 0)
 798                                 saved_errno = errno;
 799         }
 800
 801         newfd = open(path, O_CREAT | O_RDWR | O_TRUNC | O_BINARY, S_IRUSR | S_IWUSR);
 802         if (newfd < 0 && saved_errno != 0)
 803                 errno = saved_errno;
 804         return newfd;
 805 }
 806
 807 /*
 808  * copy --
 809  *      copy from one file to another
 810  */
 811 static int
 812 copy(int from_fd, const char *from_name, int to_fd, const char *to_name,
 813     off_t size)
 814 {
 815         int nr, nw;
 816         int serrno;
 817         char *p, buf[MAXBSIZE];
 818         int done_copy;
 819
 820         /* Rewind file descriptors. */
 821         if (lseek(from_fd, (off_t)0, SEEK_SET) == (off_t)-1)
 822                 return err(EX_OSERR, "lseek: %s", from_name);
 823         if (lseek(to_fd, (off_t)0, SEEK_SET) == (off_t)-1)
 824                 return err(EX_OSERR, "lseek: %s", to_name);
 825
 826         /*
 827          * Mmap and write if less than 8M (the limit is so we don't totally
 828          * trash memory on big files.  This is really a minor hack, but it
 829          * wins some CPU back.
 830          */
 831         done_copy = 0;
 832 #ifdef USE_MMAP
 833         if (size <= 8 * 1048576 && trymmap(from_fd) &&
 834             (p = mmap(NULL, (size_t)size, PROT_READ, MAP_SHARED,
 835                     from_fd, (off_t)0)) != (char *)MAP_FAILED) {
 836                 if ((nw = write(to_fd, p, size)) != size) {
 837                         serrno = errno;
 838                         (void)unlink(to_name);
 839                         errno = nw > 0 ? EIO : serrno;
 840                         err(EX_OSERR, "%s", to_name);
 841                 }
 842                 done_copy = 1;
 843         }
 844 #else
 845         (void)p;
 846 #endif
 847         if (!done_copy) {
 848                 while ((nr = read(from_fd, buf, sizeof(buf))) > 0)
 849                         if ((nw = write(to_fd, buf, nr)) != nr) {
 850                                 serrno = errno;
 851                                 (void)unlink(to_name);
 852                                 errno = nw > 0 ? EIO : serrno;
 853                                 return err(EX_OSERR, "%s", to_name);
 854                         }
 855                 if (nr != 0) {
 856                         serrno = errno;
 857                         (void)unlink(to_name);
 858                         errno = serrno;
 859                         return err(EX_OSERR, "%s", from_name);
 860                 }
 861         }
 862         return EX_OK;
 863 }
 864
 865 /*
 866  * strip --
 867  *      use strip(1) to strip the target file
 868  */
 869 static int
 870 strip(const char *to_name)
 871 {
 872 #if defined(__EMX__) || defined(_MSC_VER)
 873         const char *stripbin = getenv("STRIPBIN");
 874         if (stripbin == NULL)
 875                 stripbin = "strip";
 876         return spawnlp(P_WAIT, stripbin, stripbin, to_name, NULL);
 877 #else
 878         const char *stripbin;
 879         int serrno, status;
 880         pid_t pid;
 881
 882         pid = fork();
 883         switch (pid) {
 884         case -1:
 885                 serrno = errno;
 886                 (void)unlink(to_name);
 887                 errno = serrno;
 888                 return err(EX_TEMPFAIL, "fork");
 889         case 0:
 890                 stripbin = getenv("STRIPBIN");
 891                 if (stripbin == NULL)
 892                         stripbin = "strip";
 893                 execlp(stripbin, stripbin, to_name, (char *)NULL);
 894                 err(EX_OSERR, "exec(%s)", stripbin);
 895                 exit(EX_OSERR);
 896         default:
 897                 if (waitpid(pid, &status, 0) == -1 || status) {
 898                         serrno = errno;
 899                         (void)unlink(to_name);
 900                         errno = serrno;
 901                         return err(EX_SOFTWARE, "waitpid");
 902                         /* NOTREACHED */
 903                 }
 904         }
 905         return 0;
 906 #endif
 907 }
 908
 909 /*
 910  * install_dir --
 911  *      build directory heirarchy
 912  */
 913 static int
 914 install_dir(char *path)
 915 {
 916         char *p;
 917         struct stat sb;
 918         int ch;
 919
 920         for (p = path;; ++p)
 921                 if (!*p || (p != path && IS_SLASH(*p))) {
 922                         ch = *p;
 923                         *p = '\0';
 924                         if (stat(path, &sb)) {
 925                                 if (errno != ENOENT || mkdir(path, 0755) < 0) {
 926                                         return err(EX_OSERR, "mkdir %s", path);
 927                                         /* NOTREACHED */
 928                                 } else if (verbose)
 929                                         (void)printf("install: mkdir %s\n",
 930                                                      path);
 931                         } else if (!S_ISDIR(sb.st_mode))
 932                                 return errx(EX_OSERR, "%s exists but is not a directory", path);
 933                         if (!(*p = ch))
 934                                 break;
 935                 }
 936
 937         if ((gid != (gid_t)-1 || uid != (uid_t)-1) && chown(path, uid, gid))
 938                 warn("chown %u:%u %s", uid, gid, path);
 939         if (chmod(path, mode))
 940                 warn("chmod %o %s", mode, path);
 941         return EX_OK;
 942 }
 943
 944 /*
 945  * usage --
 946  *      print a usage message and die
 947  */
 948 static int
 949 usage(FILE *pf)
 950 {
 951         fprintf(stderr,
 952 "usage: %s [-bCcpSsv] [-B suffix] [-f flags] [-g group] [-m mode]\n"
 953 "           [-o owner] file1 file2\n"
 954 "   or: %s [-bCcpSsv] [-B suffix] [-f flags] [-g group] [-m mode]\n"
 955 "           [-o owner] file1 ... fileN directory\n"
 956 "   or: %s -d [-v] [-g group] [-m mode] [-o owner] directory ...\n"
 957 "   or: %s --help\n"
 958 "   or: %s --version\n",
 959                         g_progname, g_progname, g_progname, g_progname, g_progname);
 960         return EX_USAGE;
 961 }
 962
 963 #ifdef USE_MMAP
 964 /*
 965  * trymmap --
 966  *      return true (1) if mmap should be tried, false (0) if not.
 967  */
 968 static int
 969 trymmap(int fd)
 970 {
 971 /*
 972  * The ifdef is for bootstrapping - f_fstypename doesn't exist in
 973  * pre-Lite2-merge systems.
 974  */
 975 #ifdef MFSNAMELEN
 976         struct statfs stfs;
 977
 978         if (nommap || fstatfs(fd, &stfs) != 0)
 979                 return (0);
 980         if (strcmp(stfs.f_fstypename, "ufs") == 0 ||
 981             strcmp(stfs.f_fstypename, "cd9660") == 0)
 982                 return (1);
 983 #endif
 984         return (0);
 985 }
 986 #endif
 987
 988 /* figures out where the last slash or colon is. */
 989 static char *
 990 last_slash(const char *path)
 991 {
 992 #if defined(__WIN32__) || defined(__WIN64__) || defined(__OS2__)
 993     char *p = (char *)strrchr(path, '/');
 994     if (p)
 995     {
 996         char *p2 = strrchr(p, '\\');
 997         if (p2)
 998             p = p2;
 999     }
1000     else
1001     {
1002         p = (char *)strrchr(path, '\\');
1003         if (!p && isalpha(path[0]) && path[1] == ':')
1004             p = (char *)&path[1];
1005     }
1006     return p;
1007 #else
1008     return strrchr(path, '/');
1009 #endif
1010 }
1011