Logo Search packages:      
Sourcecode: kbuild version File versions  Download package

install.c

/*
 * Copyright (c) 1987, 1993
 *    The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    This product includes software developed by the University of
 *    California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1987, 1993\n\
      The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#if 0
#ifndef lint
static char sccsid[] = "@(#)xinstall.c    8.1 (Berkeley) 7/21/93";
#endif /* not lint */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/usr.bin/xinstall/xinstall.c,v 1.66 2005/01/25 14:34:57 ssouhlal Exp $");
#endif

#ifndef _MSC_VER
# include <sys/param.h>
# ifdef USE_MMAP
#  include <sys/mman.h>
# endif
# include <sys/mount.h>
# include <sys/wait.h>
# include <sys/time.h>
#endif /* !_MSC_VER */
#include <sys/stat.h>

#include <ctype.h>
#include "err.h"
#include <errno.h>
#include <fcntl.h>
#include <grp.h>
#include <paths.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>
#if defined(__EMX__) || defined(_MSC_VER)
# include <process.h>
#endif
#include "getopt.h"
#ifdef __sun__
# include "solfakes.h"
#endif
#ifdef _MSC_VER
# include "mscfakes.h"
#endif
#include "kmkbuiltin.h"


extern void * setmode(const char *p);
extern mode_t getmode(const void *bbox, mode_t omode);

#ifndef __unused
# define __unused
#endif

#ifndef MAXBSIZE
# define MAXBSIZE 0x20000
#endif

/* Bootstrap aid - this doesn't exist in most older releases */
#ifndef MAP_FAILED
#define MAP_FAILED ((void *)-1)     /* from <sys/mman.h> */
#endif

#define MAX_CMP_SIZE    (16 * 1024 * 1024)

#define     DIRECTORY   0x01        /* Tell install it's a directory. */
#define     SETFLAGS    0x02        /* Tell install to set flags. */
#define     NOCHANGEBITS      (UF_IMMUTABLE | UF_APPEND | SF_IMMUTABLE | SF_APPEND)
#define     BACKUP_SUFFIX     ".old"

#ifndef O_BINARY
# define O_BINARY 0
#endif

#ifndef EFTYPE
# define EFTYPE EINVAL
#endif

#if defined(__WIN32__) || defined(__WIN64__) || defined(__OS2__)
# define IS_SLASH(ch)   ((ch) == '/' || (ch) == '\\')
#else
# define IS_SLASH(ch)   ((ch) == '/')
#endif

static gid_t gid;
static uid_t uid;
static int dobackup, docompare, dodir, dopreserve, dostrip, nommap, safecopy, verbose;
static mode_t mode = S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH;
static const char *suffix = BACKUP_SUFFIX;

static struct option long_options[] =
{
    { "help",                             no_argument, 0, 261 },
    { "version",                                no_argument, 0, 262 },
    { 0, 0, 0, 0 },
};


static int  copy(int, const char *, int, const char *, off_t);
static int  compare(int, const char *, size_t, int, const char *, size_t);
static int  create_newfile(const char *, int, struct stat *);
static int  create_tempfile(const char *, char *, size_t);
static int  install(const char *, const char *, u_long, u_int);
static int  install_dir(char *);
static u_long     numeric_id(const char *, const char *);
static int  strip(const char *);
#ifdef USE_MMAP
static int  trymmap(int);
#endif
static int  usage(FILE *);
static char    *last_slash(const char *);

int
kmk_builtin_install(int argc, char *argv[], char **envp)
{
      struct stat from_sb, to_sb;
      mode_t *set;
      u_long fset = 0;
      int ch, no_target;
      u_int iflags;
      char *flags;
      const char *group, *owner, *to_name;

        /* reinitialize globals */
        mode = S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH;
        suffix = BACKUP_SUFFIX;
        gid = 0;
        uid = 0;
        dobackup = docompare = dodir = dopreserve = dostrip = nommap = safecopy = verbose = 0;

        /* reset getopt and set progname. */
        g_progname = argv[0];
        opterr = 1;
        optarg = NULL;
        optopt = 0;
        optind = 0; /* init */

      iflags = 0;
      group = owner = NULL;
      while ((ch = getopt_long(argc, argv, "B:bCcdf:g:Mm:o:pSsv", long_options, NULL)) != -1)
            switch(ch) {
            case 'B':
                  suffix = optarg;
                  /* FALLTHROUGH */
            case 'b':
                  dobackup = 1;
                  break;
            case 'C':
                  docompare = 1;
                  break;
            case 'c':
                  /* For backwards compatibility. */
                  break;
            case 'd':
                  dodir = 1;
                  break;
            case 'f':
#ifdef UF_IMMUTABLE
                  flags = optarg;
                  if (strtofflags(&flags, &fset, NULL))
                        return errx(EX_USAGE, "%s: invalid flag", flags);
                  iflags |= SETFLAGS;
#else
                  (void)flags;
#endif
                  break;
            case 'g':
                  group = optarg;
                  break;
            case 'M':
                  nommap = 1;
                  break;
                case 'm':
#ifdef __EMX__
                  if (!(set = bsd_setmode(optarg)))
#else
                  if (!(set = setmode(optarg)))
#endif
                        return errx(EX_USAGE, "invalid file mode: %s",
                                    optarg);
                  mode = getmode(set, 0);
                  free(set);
                  break;
            case 'o':
                  owner = optarg;
                  break;
            case 'p':
                  docompare = dopreserve = 1;
                  break;
            case 'S':
                  safecopy = 1;
                  break;
            case 's':
                  dostrip = 1;
                  break;
            case 'v':
                  verbose = 1;
                  break;
            case 261:
                  usage(stdout);
                  return 0;
            case 262:
                  return kbuild_version(argv[0]);
            case '?':
            default:
                  return usage(stderr);
            }
      argc -= optind;
      argv += optind;

      /* some options make no sense when creating directories */
      if (dostrip && dodir) {
            warnx("-d and -s may not be specified together");
            return usage(stderr);
      }

      /* must have at least two arguments, except when creating directories */
      if (argc == 0 || (argc == 1 && !dodir))
            return usage(stderr);

      /* need to make a temp copy so we can compare stripped version */
      if (docompare && dostrip)
            safecopy = 1;

      /* get group and owner id's */
      if (group != NULL) {
#ifndef _MSC_VER
            struct group *gp;
            if ((gp = getgrnam(group)) != NULL)
                  gid = gp->gr_gid;
            else
#endif
            {
                  gid = (gid_t)numeric_id(group, "group");
                  if (gid == (gid_t)-1)
                        return 1;
            }
      } else
            gid = (gid_t)-1;

      if (owner != NULL) {
#ifndef _MSC_VER
                struct passwd *pp;
            if ((pp = getpwnam(owner)) != NULL)
                  uid = pp->pw_uid;
            else
#endif
            {
                  uid = (uid_t)numeric_id(owner, "user");
                  if (uid == (uid_t)-1)
                        return 1;
            }
      } else
            uid = (uid_t)-1;

      if (dodir) {
            for (; *argv != NULL; ++argv) {
                  int rc = install_dir(*argv);
                  if (rc)
                        return rc;
            }
            return EX_OK;
            /* NOTREACHED */
      }

      no_target = stat(to_name = argv[argc - 1], &to_sb);
      if (!no_target && S_ISDIR(to_sb.st_mode)) {
            for (; *argv != to_name; ++argv) {
                  int rc = install(*argv, to_name, fset, iflags | DIRECTORY);
                  if (rc)
                        return rc;
            }
            return EX_OK;
      }

      /* can't do file1 file2 directory/file */
      if (argc != 2) {
            warnx("wrong number or types of arguments");
            return usage(stderr);
      }

      if (!no_target) {
            if (stat(*argv, &from_sb))
                  return err(EX_OSERR, "%s", *argv);
            if (!S_ISREG(to_sb.st_mode)) {
                  errno = EFTYPE;
                  return err(EX_OSERR, "%s", to_name);
            }
            if (to_sb.st_dev == from_sb.st_dev &&
                    to_sb.st_dev != 0 &&
                to_sb.st_ino == from_sb.st_ino &&
                to_sb.st_ino != 0)
                  return errx(EX_USAGE,
                              "%s and %s are the same file", *argv, to_name);
      }
      return install(*argv, to_name, fset, iflags);
}

static u_long
numeric_id(const char *name, const char *type)
{
      u_long val;
      char *ep;

      /*
       * XXX
       * We know that uid_t's and gid_t's are unsigned longs.
       */
      errno = 0;
      val = strtoul(name, &ep, 10);
      if (errno)
            return err(-1, "%s", name);
      if (*ep != '\0')
            return errx(-1, "unknown %s %s", type, name);
      return (val);
}

/*
 * install --
 *    build a path name and install the file
 */
static int
install(const char *from_name, const char *to_name, u_long fset, u_int flags)
{
      struct stat from_sb, temp_sb, to_sb;
      struct timeval tvb[2];
      int devnull, files_match, from_fd, serrno, target;
      int tempcopy, temp_fd, to_fd;
      char backup[MAXPATHLEN], *p, pathbuf[MAXPATHLEN], tempfile[MAXPATHLEN];
      int rc = EX_OK;

      files_match = 0;
      from_fd = -1;
      to_fd = -1;
      temp_fd = -1;

      /* If try to install NULL file to a directory, fails. */
      if (flags & DIRECTORY
#if defined(__EMX__) || defined(_MSC_VER)
          || (   stricmp(from_name, _PATH_DEVNULL)
            && stricmp(from_name, "nul")
#ifdef __EMX__
            && stricmp(from_name, "/dev/nul")
#endif
             )
#else
          || strcmp(from_name, _PATH_DEVNULL)
#endif
          ) {
            if (stat(from_name, &from_sb))
                  return err(EX_OSERR, "%s", from_name);
            if (!S_ISREG(from_sb.st_mode)) {
                  errno = EFTYPE;
                  return err(EX_OSERR, "%s", from_name);
            }
            /* Build the target path. */
            if (flags & DIRECTORY) {
                  (void)snprintf(pathbuf, sizeof(pathbuf), "%s/%s",
                      to_name,
                      (p = last_slash(from_name)) ? ++p : from_name);
                  to_name = pathbuf;
            }
            devnull = 0;
      } else {
            devnull = 1;
      }

      target = stat(to_name, &to_sb) == 0;

      /* Only install to regular files. */
      if (target && !S_ISREG(to_sb.st_mode)) {
            errno = EFTYPE;
            warn("%s", to_name);
            return EX_OK;
      }

      /* Only copy safe if the target exists. */
      tempcopy = safecopy && target;

      if (!devnull && (from_fd = open(from_name, O_RDONLY | O_BINARY, 0)) < 0)
            return err(EX_OSERR, "%s", from_name);

      /* If we don't strip, we can compare first. */
      if (docompare && !dostrip && target) {
            if ((to_fd = open(to_name, O_RDONLY | O_BINARY, 0)) < 0) {
                  rc = err(EX_OSERR, "%s", to_name);
                  goto l_done;
            }
            if (devnull)
                  files_match = to_sb.st_size == 0;
            else
                  files_match = !(compare(from_fd, from_name,
                      (size_t)from_sb.st_size, to_fd,
                      to_name, (size_t)to_sb.st_size));

            /* Close "to" file unless we match. */
            if (!files_match) {
                  (void)close(to_fd);
                  to_fd = -1;
            }
      }

      if (!files_match) {
            if (tempcopy) {
                  to_fd = create_tempfile(to_name, tempfile,
                      sizeof(tempfile));
                  if (to_fd < 0) {
                        rc = err(EX_OSERR, "%s", tempfile);
                        goto l_done;
                  }
            } else {
                  if ((to_fd = create_newfile(to_name, target,
                      &to_sb)) < 0) {
                        rc = err(EX_OSERR, "%s", to_name);
                        goto l_done;
                  }
                  if (verbose)
                        (void)printf("install: %s -> %s\n",
                            from_name, to_name);
            }
            if (!devnull) {
                  rc = copy(from_fd, from_name, to_fd,
                            tempcopy ? tempfile : to_name, from_sb.st_size);
                  if (rc)
                        goto l_done;
            }
      }

      if (dostrip) {
#if defined(__EMX__) || defined(_MSC_VER)
            /* close before we strip. */
            close(to_fd);
            to_fd = -1;
#endif
            rc = strip(tempcopy ? tempfile : to_name);
            if (rc)
                  goto l_done;

            /*
             * Re-open our fd on the target, in case we used a strip
             * that does not work in-place -- like GNU binutils strip.
             */
#if !defined(__EMX__) && !defined(_MSC_VER)
            close(to_fd);
#endif
            to_fd = open(tempcopy ? tempfile : to_name, O_RDONLY | O_BINARY, 0);
            if (to_fd < 0) {
                  rc = err(EX_OSERR, "stripping %s", to_name);
                  goto l_done;
            }
      }

      /*
       * Compare the stripped temp file with the target.
       */
      if (docompare && dostrip && target) {
            temp_fd = to_fd;

            /* Re-open to_fd using the real target name. */
            if ((to_fd = open(to_name, O_RDONLY | O_BINARY, 0)) < 0) {
                  rc = err(EX_OSERR, "%s", to_name);
                  goto l_done;
            }

            if (fstat(temp_fd, &temp_sb)) {
                  serrno = errno;
                  (void)unlink(tempfile);
                  errno = serrno;
                  rc = err(EX_OSERR, "%s", tempfile);
                  goto l_done;
            }

            if (compare(temp_fd, tempfile, (size_t)temp_sb.st_size, to_fd,
                      to_name, (size_t)to_sb.st_size) == 0) {
                  /*
                   * If target has more than one link we need to
                   * replace it in order to snap the extra links.
                   * Need to preserve target file times, though.
                   */
#if !defined(_MSC_VER) && !defined(__EMX__)
                  if (to_sb.st_nlink != 1) {
                        tvb[0].tv_sec = to_sb.st_atime;
                        tvb[0].tv_usec = 0;
                        tvb[1].tv_sec = to_sb.st_mtime;
                        tvb[1].tv_usec = 0;
                        (void)utimes(tempfile, tvb);
                  } else
#endif
                        {

                        files_match = 1;
                        (void)unlink(tempfile);
                  }
                  (void) close(temp_fd);
                  temp_fd = -1;
            }
      }

      /*
       * Move the new file into place if doing a safe copy
       * and the files are different (or just not compared).
       */
      if (tempcopy && !files_match) {
#ifdef UF_IMMUTABLE
            /* Try to turn off the immutable bits. */
            if (to_sb.st_flags & NOCHANGEBITS)
                  (void)chflags(to_name, to_sb.st_flags & ~NOCHANGEBITS);
#endif
            if (dobackup) {
                  if ((size_t)snprintf(backup, MAXPATHLEN, "%s%s", to_name,
                      suffix) != strlen(to_name) + strlen(suffix)) {
                        unlink(tempfile);
                        rc = errx(EX_OSERR, "%s: backup filename too long",
                                  to_name);
                        goto l_done;
                  }
                  if (verbose)
                        (void)printf("install: %s -> %s\n", to_name, backup);
                  if (rename(to_name, backup) < 0) {
                        serrno = errno;
                        unlink(tempfile);
                        errno = serrno;
                        rc = err(EX_OSERR, "rename: %s to %s", to_name,
                                 backup);
                        goto l_done;
                  }
            }
            if (verbose)
                  (void)printf("install: %s -> %s\n", from_name, to_name);
            if (rename(tempfile, to_name) < 0) {
                  serrno = errno;
                  unlink(tempfile);
                  errno = serrno;
                  rc = err(EX_OSERR, "rename: %s to %s",
                           tempfile, to_name);
                  goto l_done;
            }

            /* Re-open to_fd so we aren't hosed by the rename(2). */
            (void) close(to_fd);
            if ((to_fd = open(to_name, O_RDONLY | O_BINARY, 0)) < 0) {
                  rc = err(EX_OSERR, "%s", to_name);
                  goto l_done;
            }
      }

      /*
       * Preserve the timestamp of the source file if necessary.
       */
      if (dopreserve && !files_match && !devnull) {
            tvb[0].tv_sec = from_sb.st_atime;
            tvb[0].tv_usec = 0;
            tvb[1].tv_sec = from_sb.st_mtime;
            tvb[1].tv_usec = 0;
            (void)utimes(to_name, tvb);
      }

      if (fstat(to_fd, &to_sb) == -1) {
            serrno = errno;
            (void)unlink(to_name);
            errno = serrno;
            rc = err(EX_OSERR, "%s", to_name);
            goto l_done;
      }

      /*
       * Set owner, group, mode for target; do the chown first,
       * chown may lose the setuid bits.
       */
#ifdef UF_IMMUTABLE
      if ((gid != (gid_t)-1 && gid != to_sb.st_gid) ||
          (uid != (uid_t)-1 && uid != to_sb.st_uid) ||
          (mode != (to_sb.st_mode & ALLPERMS))) {
            /* Try to turn off the immutable bits. */
            if (to_sb.st_flags & NOCHANGEBITS)
                  (void)fchflags(to_fd, to_sb.st_flags & ~NOCHANGEBITS);
      }
#endif

      if ((gid != (gid_t)-1 && gid != to_sb.st_gid) ||
          (uid != (uid_t)-1 && uid != to_sb.st_uid))
            if (fchown(to_fd, uid, gid) == -1) {
                  serrno = errno;
                  (void)unlink(to_name);
                  errno = serrno;
                  rc = err(EX_OSERR,"%s: chown/chgrp", to_name);
                  goto l_done;
            }

      if (mode != (to_sb.st_mode & ALLPERMS))
            if (fchmod(to_fd, mode)) {
                  serrno = errno;
                  (void)unlink(to_name);
                  errno = serrno;
                  rc = err(EX_OSERR, "%s: chmod", to_name);
                  goto l_done;
            }

      /*
       * If provided a set of flags, set them, otherwise, preserve the
       * flags, except for the dump flag.
       * NFS does not support flags.  Ignore EOPNOTSUPP flags if we're just
       * trying to turn off UF_NODUMP.  If we're trying to set real flags,
       * then warn if the the fs doesn't support it, otherwise fail.
       */
#ifdef UF_IMMUTABLE
      if (!devnull && (flags & SETFLAGS ||
          (from_sb.st_flags & ~UF_NODUMP) != to_sb.st_flags) &&
          fchflags(to_fd,
          flags & SETFLAGS ? fset : from_sb.st_flags & ~UF_NODUMP)) {
            if (flags & SETFLAGS) {
                  if (errno == EOPNOTSUPP)
                        warn("%s: chflags", to_name);
                  else {
                        serrno = errno;
                        (void)unlink(to_name);
                        errno = serrno;
                        rc = err(EX_OSERR, "%s: chflags", to_name);
                        goto l_done;
                  }
            }
      }
#endif

l_done:
      if (to_fd >= 0)
            (void)close(to_fd);
      if (temp_fd >= 0)
            (void)close(temp_fd);
      if (!devnull)
            (void)close(from_fd);
      return rc;
}

/*
 * compare --
 *    compare two files; non-zero means files differ
 */
static int
compare(int from_fd, const char *from_name __unused, size_t from_len,
      int to_fd, const char *to_name __unused, size_t to_len)
{
      char *p, *q;
      int rv;
      int done_compare;

      rv = 0;
      if (from_len != to_len)
            return 1;

      if (from_len <= MAX_CMP_SIZE) {
#ifdef USE_MMAP
            done_compare = 0;
            if (trymmap(from_fd) && trymmap(to_fd)) {
                  p = mmap(NULL, from_len, PROT_READ, MAP_SHARED, from_fd, (off_t)0);
                  if (p == (char *)MAP_FAILED)
                        goto out;
                  q = mmap(NULL, from_len, PROT_READ, MAP_SHARED, to_fd, (off_t)0);
                  if (q == (char *)MAP_FAILED) {
                        munmap(p, from_len);
                        goto out;
                  }

                  rv = memcmp(p, q, from_len);
                  munmap(p, from_len);
                  munmap(q, from_len);
                  done_compare = 1;
            }
      out:
#else
      (void)p; (void)q;
      done_compare = 0;
#endif
            if (!done_compare) {
                  char buf1[MAXBSIZE];
                  char buf2[MAXBSIZE];
                  int n1, n2;

                  rv = 0;
                  lseek(from_fd, 0, SEEK_SET);
                  lseek(to_fd, 0, SEEK_SET);
                  while (rv == 0) {
                        n1 = read(from_fd, buf1, sizeof(buf1));
                        if (n1 == 0)
                              break;            /* EOF */
                        else if (n1 > 0) {
                              n2 = read(to_fd, buf2, n1);
                              if (n2 == n1)
                                    rv = memcmp(buf1, buf2, n1);
                              else
                                    rv = 1;     /* out of sync */
                        } else
                              rv = 1;           /* read failure */
                  }
                  lseek(from_fd, 0, SEEK_SET);
                  lseek(to_fd, 0, SEEK_SET);
            }
      } else
            rv = 1;     /* don't bother in this case */

      return rv;
}

/*
 * create_tempfile --
 *    create a temporary file based on path and open it
 */
int
create_tempfile(const char *path, char *temp, size_t tsize)
{
      char *p;

      (void)strncpy(temp, path, tsize);
      temp[tsize - 1] = '\0';
      if ((p = last_slash(temp)) != NULL)
            p++;
      else
            p = temp;
      (void)strncpy(p, "INS@XXXX", &temp[tsize - 1] - p);
      temp[tsize - 1] = '\0';
      return (mkstemp(temp));
}

/*
 * create_newfile --
 *    create a new file, overwriting an existing one if necessary
 */
int
create_newfile(const char *path, int target, struct stat *sbp)
{
      char backup[MAXPATHLEN];
      int saved_errno = 0;
      int newfd;

      if (target) {
            /*
             * Unlink now... avoid ETXTBSY errors later.  Try to turn
             * off the append/immutable bits -- if we fail, go ahead,
             * it might work.
             */
#ifdef UF_IMMUTABLE
            if (sbp->st_flags & NOCHANGEBITS)
                  (void)chflags(path, sbp->st_flags & ~NOCHANGEBITS);
#endif

            if (dobackup) {
                  if ((size_t)snprintf(backup, MAXPATHLEN, "%s%s",
                      path, suffix) != strlen(path) + strlen(suffix)) {
                        errx(EX_OSERR, "%s: backup filename too long",
                             path);
                        errno = ENAMETOOLONG;
                        return -1;
                  }
                  (void)snprintf(backup, MAXPATHLEN, "%s%s",
                      path, suffix);
                  if (verbose)
                        (void)printf("install: %s -> %s\n",
                            path, backup);
                  if (rename(path, backup) < 0) {
                        err(EX_OSERR, "rename: %s to %s", path, backup);
                        return -1;
                  }
            } else
                  if (unlink(path) < 0)
                        saved_errno = errno;
      }

      newfd = open(path, O_CREAT | O_RDWR | O_TRUNC | O_BINARY, S_IRUSR | S_IWUSR);
      if (newfd < 0 && saved_errno != 0)
            errno = saved_errno;
      return newfd;
}

/*
 * copy --
 *    copy from one file to another
 */
static int
copy(int from_fd, const char *from_name, int to_fd, const char *to_name,
    off_t size)
{
      int nr, nw;
      int serrno;
      char *p, buf[MAXBSIZE];
      int done_copy;

      /* Rewind file descriptors. */
      if (lseek(from_fd, (off_t)0, SEEK_SET) == (off_t)-1)
            return err(EX_OSERR, "lseek: %s", from_name);
      if (lseek(to_fd, (off_t)0, SEEK_SET) == (off_t)-1)
            return err(EX_OSERR, "lseek: %s", to_name);

      /*
       * Mmap and write if less than 8M (the limit is so we don't totally
       * trash memory on big files.  This is really a minor hack, but it
       * wins some CPU back.
       */
      done_copy = 0;
#ifdef USE_MMAP
      if (size <= 8 * 1048576 && trymmap(from_fd) &&
          (p = mmap(NULL, (size_t)size, PROT_READ, MAP_SHARED,
                from_fd, (off_t)0)) != (char *)MAP_FAILED) {
            if ((nw = write(to_fd, p, size)) != size) {
                  serrno = errno;
                  (void)unlink(to_name);
                  errno = nw > 0 ? EIO : serrno;
                  err(EX_OSERR, "%s", to_name);
            }
            done_copy = 1;
      }
#else
      (void)p;
#endif
      if (!done_copy) {
            while ((nr = read(from_fd, buf, sizeof(buf))) > 0)
                  if ((nw = write(to_fd, buf, nr)) != nr) {
                        serrno = errno;
                        (void)unlink(to_name);
                        errno = nw > 0 ? EIO : serrno;
                        return err(EX_OSERR, "%s", to_name);
                  }
            if (nr != 0) {
                  serrno = errno;
                  (void)unlink(to_name);
                  errno = serrno;
                  return err(EX_OSERR, "%s", from_name);
            }
      }
      return EX_OK;
}

/*
 * strip --
 *    use strip(1) to strip the target file
 */
static int
strip(const char *to_name)
{
#if defined(__EMX__) || defined(_MSC_VER)
      const char *stripbin = getenv("STRIPBIN");
      if (stripbin == NULL)
            stripbin = "strip";
      return spawnlp(P_WAIT, stripbin, stripbin, to_name, NULL);
#else
      const char *stripbin;
      int serrno, status;
        pid_t pid;

        pid = fork();
      switch (pid) {
      case -1:
            serrno = errno;
            (void)unlink(to_name);
            errno = serrno;
            return err(EX_TEMPFAIL, "fork");
      case 0:
            stripbin = getenv("STRIPBIN");
            if (stripbin == NULL)
                  stripbin = "strip";
            execlp(stripbin, stripbin, to_name, (char *)NULL);
            err(EX_OSERR, "exec(%s)", stripbin);
                exit(EX_OSERR);
      default:
            if (waitpid(pid, &status, 0) == -1 || status) {
                  serrno = errno;
                  (void)unlink(to_name);
                        errno = serrno;
                  return err(EX_SOFTWARE, "waitpid");
                  /* NOTREACHED */
            }
      }
        return 0;
#endif
}

/*
 * install_dir --
 *    build directory heirarchy
 */
static int
install_dir(char *path)
{
      char *p;
      struct stat sb;
      int ch;

      for (p = path;; ++p)
            if (!*p || (p != path && IS_SLASH(*p))) {
                  ch = *p;
                  *p = '\0';
                  if (stat(path, &sb)) {
                        if (errno != ENOENT || mkdir(path, 0755) < 0) {
                              return err(EX_OSERR, "mkdir %s", path);
                              /* NOTREACHED */
                        } else if (verbose)
                              (void)printf("install: mkdir %s\n",
                                         path);
                  } else if (!S_ISDIR(sb.st_mode))
                        return errx(EX_OSERR, "%s exists but is not a directory", path);
                  if (!(*p = ch))
                        break;
            }

      if ((gid != (gid_t)-1 || uid != (uid_t)-1) && chown(path, uid, gid))
            warn("chown %u:%u %s", uid, gid, path);
      if (chmod(path, mode))
            warn("chmod %o %s", mode, path);
      return EX_OK;
}

/*
 * usage --
 *    print a usage message and die
 */
static int
usage(FILE *pf)
{
      fprintf(stderr,
"usage: %s [-bCcpSsv] [-B suffix] [-f flags] [-g group] [-m mode]\n"
"           [-o owner] file1 file2\n"
"   or: %s [-bCcpSsv] [-B suffix] [-f flags] [-g group] [-m mode]\n"
"           [-o owner] file1 ... fileN directory\n"
"   or: %s -d [-v] [-g group] [-m mode] [-o owner] directory ...\n"
"   or: %s --help\n"
"   or: %s --version\n",
                  g_progname, g_progname, g_progname, g_progname, g_progname);
      return EX_USAGE;
}

#ifdef USE_MMAP
/*
 * trymmap --
 *    return true (1) if mmap should be tried, false (0) if not.
 */
static int
trymmap(int fd)
{
/*
 * The ifdef is for bootstrapping - f_fstypename doesn't exist in
 * pre-Lite2-merge systems.
 */
#ifdef MFSNAMELEN
      struct statfs stfs;

      if (nommap || fstatfs(fd, &stfs) != 0)
            return (0);
      if (strcmp(stfs.f_fstypename, "ufs") == 0 ||
          strcmp(stfs.f_fstypename, "cd9660") == 0)
            return (1);
#endif
      return (0);
}
#endif

/* figures out where the last slash or colon is. */
static char *
last_slash(const char *path)
{
#if defined(__WIN32__) || defined(__WIN64__) || defined(__OS2__)
    char *p = (char *)strrchr(path, '/');
    if (p)
    {
        char *p2 = strrchr(p, '\\');
        if (p2)
            p = p2;
    }
    else
    {
        p = (char *)strrchr(path, '\\');
        if (!p && isalpha(path[0]) && path[1] == ':')
            p = (char *)&path[1];
    }
    return p;
#else
    return strrchr(path, '/');
#endif
}


Generated by  Doxygen 1.6.0   Back to index