mirror of
https://github.com/freebsd/freebsd-src
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2e2b09d90d
The real fix requires changes to getpwent(3) and friends and getgrent(3) and friends. Submitted by: Tim Wilkinson
504 lines
13 KiB
C
504 lines
13 KiB
C
/*
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* Copyright (c) 1987, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1987, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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/*static char sccsid[] = "From: @(#)xinstall.c 8.1 (Berkeley) 7/21/93";*/
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static const char rcsid[] =
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"$Id: xinstall.c,v 1.4 1995/10/09 07:21:00 bde Exp $";
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#endif /* not lint */
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/*-
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* Todo:
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* o for -C, compare original files except in -s case.
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* o for -C, don't change anything if nothing needs be changed. In
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* particular, don't toggle the immutable flags just to allow null
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* attribute changes and don't clear the dump flag. (I think inode
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* ctimes are not updated for null attribute changes, but this is a
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* bug.)
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* o independent of -C, if a copy must be made, then copy to a tmpfile,
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* set all attributes except the immutable flags, then rename, then
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* set the immutable flags. It's annoying that the immutable flags
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* defeat the atomicicity of rename - it seems that there must be
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* o a window where the target is not immutable.
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*/
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#include <sys/param.h>
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#include <sys/wait.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <grp.h>
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#include <paths.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sysexits.h>
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#include <unistd.h>
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#include <utime.h>
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#include "pathnames.h"
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struct passwd *pp;
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struct group *gp;
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int debug, docompare, docopy, dopreserve, dostrip;
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int mode = S_IRWXU|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH;
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char *group, *owner, pathbuf[MAXPATHLEN];
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char pathbuf2[MAXPATHLEN];
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#define DIRECTORY 0x01 /* Tell install it's a directory. */
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#define SETFLAGS 0x02 /* Tell install to set flags. */
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#define NOCHANGEBITS (UF_IMMUTABLE | UF_APPEND | SF_IMMUTABLE | SF_APPEND)
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void copy __P((int, char *, int, char *, off_t));
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int compare __P((int, const char *, int, const char *,
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const struct stat *, const struct stat *));
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void install __P((char *, char *, u_long, u_int));
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u_long string_to_flags __P((char **, u_long *, u_long *));
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void strip __P((char *));
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void usage __P((void));
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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struct stat from_sb, to_sb;
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mode_t *set;
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u_long fset;
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u_int iflags;
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int ch, no_target;
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char *flags, *to_name;
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iflags = 0;
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while ((ch = getopt(argc, argv, "Ccdf:g:m:o:ps")) != EOF)
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switch((char)ch) {
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case 'C':
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docompare = docopy = 1;
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break;
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case 'c':
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docopy = 1;
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break;
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case 'd':
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debug++;
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break;
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case 'f':
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flags = optarg;
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if (string_to_flags(&flags, &fset, NULL))
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errx(EX_USAGE, "%s: invalid flag", flags);
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iflags |= SETFLAGS;
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break;
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case 'g':
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group = optarg;
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break;
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case 'm':
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if (!(set = setmode(optarg)))
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errx(EX_USAGE, "invalid file mode: %s",
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optarg);
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mode = getmode(set, 0);
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break;
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case 'o':
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owner = optarg;
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break;
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case 'p':
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docompare = docopy = dopreserve = 1;
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break;
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case 's':
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dostrip = 1;
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (argc < 2)
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usage();
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/* get group and owner id's */
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if (owner && !(pp = getpwnam(owner)))
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errx(EX_NOUSER, "unknown user %s", owner);
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if (group && !(gp = getgrnam(group)))
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errx(EX_NOUSER, "unknown group %s", group);
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no_target = stat(to_name = argv[argc - 1], &to_sb);
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if (!no_target && (to_sb.st_mode & S_IFMT) == S_IFDIR) {
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for (; *argv != to_name; ++argv)
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install(*argv, to_name, fset, iflags | DIRECTORY);
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exit(0);
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}
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/* can't do file1 file2 directory/file */
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if (argc != 2)
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usage();
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if (!no_target) {
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if (stat(*argv, &from_sb))
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err(EX_OSERR, "%s", *argv);
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if (!S_ISREG(to_sb.st_mode)) {
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errno = EFTYPE;
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err(EX_OSERR, "%s", to_name);
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}
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if (to_sb.st_dev == from_sb.st_dev &&
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to_sb.st_ino == from_sb.st_ino)
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errx(EX_USAGE,
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"%s and %s are the same file", *argv, to_name);
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/*
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* XXX - It's not at all clear why this code was here, since it completely
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* duplicates code install(). The version in install() handles the -C flag
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* correctly, so we'll just disable this for now.
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*/
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#if 0
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/*
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* Unlink now... avoid ETXTBSY errors later. Try and turn
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* off the append/immutable bits -- if we fail, go ahead,
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* it might work.
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*/
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if (to_sb.st_flags & NOCHANGEBITS)
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(void)chflags(to_name,
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to_sb.st_flags & ~(NOCHANGEBITS));
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(void)unlink(to_name);
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#endif
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}
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install(*argv, to_name, fset, iflags);
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exit(0);
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}
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/*
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* install --
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* build a path name and install the file
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*/
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void
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install(from_name, to_name, fset, flags)
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char *from_name, *to_name;
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u_long fset;
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u_int flags;
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{
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struct stat from_sb, to_sb;
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int devnull, from_fd, to_fd, serrno;
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char *p, *old_to_name = 0;
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if (debug >= 2 && !docompare)
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fprintf(stderr, "install: invoked without -C for %s to %s\n",
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from_name, to_name);
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/* If try to install NULL file to a directory, fails. */
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if (flags & DIRECTORY || strcmp(from_name, _PATH_DEVNULL)) {
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if (stat(from_name, &from_sb))
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err(EX_OSERR, "%s", from_name);
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if (!S_ISREG(from_sb.st_mode)) {
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errno = EFTYPE;
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err(EX_OSERR, "%s", from_name);
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}
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/* Build the target path. */
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if (flags & DIRECTORY) {
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(void)snprintf(pathbuf, sizeof(pathbuf), "%s/%s",
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to_name,
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(p = strrchr(from_name, '/')) ? ++p : from_name);
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to_name = pathbuf;
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}
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devnull = 0;
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} else {
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from_sb.st_flags = 0; /* XXX */
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devnull = 1;
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}
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if (docompare) {
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old_to_name = to_name;
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/*
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* Make a new temporary file in the same file system
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* (actually, in in the same directory) as the target so
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* that the temporary file can be renamed to the target.
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*/
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snprintf(pathbuf2, sizeof pathbuf2, "%s", to_name);
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p = strrchr(pathbuf2, '/');
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p = (p == NULL ? pathbuf2 : p + 1);
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snprintf(p, &pathbuf2[sizeof pathbuf2] - p, "INS@XXXX");
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to_fd = mkstemp(pathbuf2);
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if (to_fd < 0)
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/* XXX should fall back to not comparing. */
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err(EX_OSERR, "mkstemp: %s for %s", pathbuf2, to_name);
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to_name = pathbuf2;
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} else {
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/*
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* Unlink now... avoid errors later. Try to turn off the
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* append/immutable bits -- if we fail, go ahead, it might
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* work.
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*/
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if (stat(to_name, &to_sb) == 0 && to_sb.st_flags & NOCHANGEBITS)
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(void)chflags(to_name, to_sb.st_flags & ~NOCHANGEBITS);
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unlink(to_name);
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/* Create target. */
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to_fd = open(to_name,
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O_CREAT | O_RDWR | O_TRUNC, S_IRUSR | S_IWUSR);
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if (to_fd < 0)
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err(EX_OSERR, "%s", to_name);
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}
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if (!devnull) {
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if ((from_fd = open(from_name, O_RDONLY, 0)) < 0) {
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serrno = errno;
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(void)unlink(to_name);
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errno = serrno;
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err(EX_OSERR, "%s", from_name);
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}
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copy(from_fd, from_name, to_fd, to_name, from_sb.st_size);
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(void)close(from_fd);
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}
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if (dostrip)
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strip(to_name);
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/*
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* Unfortunately, because we strip the installed file and not the
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* original one, it is impossible to do the comparison without
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* first laboriously copying things over and then comparing.
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* It may be possible to better optimize the !dostrip case, however.
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* For further study.
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*/
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if (docompare) {
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struct stat old_sb, new_sb, timestamp_sb;
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int old_fd;
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struct utimbuf utb;
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old_fd = open(old_to_name, O_RDONLY, 0);
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if (old_fd < 0 && errno == ENOENT)
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goto different;
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if (old_fd < 0)
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err(EX_OSERR, "%s", old_to_name);
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fstat(old_fd, &old_sb);
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if (old_sb.st_flags & NOCHANGEBITS)
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(void)fchflags(old_fd, old_sb.st_flags & ~NOCHANGEBITS);
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fstat(to_fd, &new_sb);
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if (compare(old_fd, old_to_name, to_fd, to_name, &old_sb,
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&new_sb)) {
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different:
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if (debug != 0)
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fprintf(stderr,
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"install: renaming for %s: %s to %s\n",
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from_name, to_name, old_to_name);
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if (dopreserve && stat(from_name, ×tamp_sb) == 0) {
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utb.actime = from_sb.st_atime;
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utb.modtime = from_sb.st_mtime;
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(void)utime(to_name, &utb);
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}
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moveit:
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if (rename(to_name, old_to_name) < 0) {
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serrno = errno;
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unlink(to_name);
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unlink(old_to_name);
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errno = serrno;
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err(EX_OSERR, "rename: %s to %s", to_name,
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old_to_name);
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}
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close(old_fd);
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} else {
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if (old_sb.st_nlink != 1) {
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/*
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* Replace the target, although it hasn't
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* changed, to snap the extra links. But
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* preserve the target file times.
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*/
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if (fstat(old_fd, ×tamp_sb) == 0) {
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utb.actime = timestamp_sb.st_atime;
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utb.modtime = timestamp_sb.st_mtime;
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(void)utime(to_name, &utb);
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}
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goto moveit;
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}
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if (unlink(to_name) < 0)
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err(EX_OSERR, "unlink: %s", to_name);
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close(to_fd);
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to_fd = old_fd;
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}
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to_name = old_to_name;
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}
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/*
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* Set owner, group, mode for target; do the chown first,
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* chown may lose the setuid bits.
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*/
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if ((group || owner) &&
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fchown(to_fd, owner ? pp->pw_uid : -1, group ? gp->gr_gid : -1)) {
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serrno = errno;
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(void)unlink(to_name);
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errno = serrno;
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err(EX_OSERR,"%s: chown/chgrp", to_name);
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}
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if (fchmod(to_fd, mode)) {
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serrno = errno;
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(void)unlink(to_name);
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errno = serrno;
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err(EX_OSERR, "%s: chmod", to_name);
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}
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/*
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* If provided a set of flags, set them, otherwise, preserve the
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* flags, except for the dump flag.
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*/
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if (fchflags(to_fd,
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flags & SETFLAGS ? fset : from_sb.st_flags & ~UF_NODUMP)) {
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serrno = errno;
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(void)unlink(to_name);
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errno = serrno;
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err(EX_OSERR, "%s: chflags", to_name);
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}
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(void)close(to_fd);
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if (!docopy && !devnull && unlink(from_name))
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err(EX_OSERR, "%s", from_name);
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}
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/*
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* compare --
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* compare two files; non-zero means files differ
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*/
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int
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compare(int from_fd, const char *from_name, int to_fd, const char *to_name,
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const struct stat *from_sb, const struct stat *to_sb)
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{
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char *p, *q;
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int rv;
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size_t tsize;
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if (from_sb->st_size != to_sb->st_size)
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return 1;
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tsize = (size_t)from_sb->st_size;
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if (tsize <= 8 * 1024 * 1024) {
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p = mmap(NULL, tsize, PROT_READ, 0, from_fd, (off_t)0);
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if ((long)p == -1)
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err(EX_OSERR, "mmap %s", from_name);
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q = mmap(NULL, tsize, PROT_READ, 0, to_fd, (off_t)0);
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if ((long)q == -1)
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err(EX_OSERR, "mmap %s", to_name);
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rv = memcmp(p, q, tsize);
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munmap(p, tsize);
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munmap(q, tsize);
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} else {
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rv = 1; /* don't bother in this case */
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}
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return rv;
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}
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/*
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* copy --
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* copy from one file to another
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*/
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void
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copy(from_fd, from_name, to_fd, to_name, size)
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register int from_fd, to_fd;
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char *from_name, *to_name;
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off_t size;
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{
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register int nr, nw;
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int serrno;
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char *p, buf[MAXBSIZE];
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/*
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* Mmap and write if less than 8M (the limit is so we don't totally
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* trash memory on big files. This is really a minor hack, but it
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* wins some CPU back.
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*/
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if (size <= 8 * 1048576) {
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if ((p = mmap(NULL, (size_t)size, PROT_READ,
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0, from_fd, (off_t)0)) == (char *)-1)
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err(EX_OSERR, "mmap %s", from_name);
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if (write(to_fd, p, size) != size)
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err(EX_OSERR, "%s", to_name);
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} else {
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while ((nr = read(from_fd, buf, sizeof(buf))) > 0)
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if ((nw = write(to_fd, buf, nr)) != nr) {
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serrno = errno;
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(void)unlink(to_name);
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errno = nw > 0 ? EIO : serrno;
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err(EX_OSERR, "%s", to_name);
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}
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if (nr != 0) {
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serrno = errno;
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(void)unlink(to_name);
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errno = serrno;
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err(EX_OSERR, "%s", from_name);
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}
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}
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}
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/*
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* strip --
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* use strip(1) to strip the target file
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*/
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void
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strip(to_name)
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char *to_name;
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{
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int serrno, status;
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switch (vfork()) {
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case -1:
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serrno = errno;
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(void)unlink(to_name);
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errno = serrno;
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err(EX_TEMPFAIL, "fork");
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case 0:
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execl(_PATH_STRIP, "strip", to_name, NULL);
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err(EX_OSERR, "exec(" _PATH_STRIP ")");
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|
default:
|
|
if (wait(&status) == -1 || status)
|
|
(void)unlink(to_name);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* usage --
|
|
* print a usage message and die
|
|
*/
|
|
void
|
|
usage()
|
|
{
|
|
(void)fprintf(stderr,
|
|
"usage: install [-Ccdps] [-f flags] [-g group] [-m mode] [-o owner] file1 file2;\n\tor file1 ... fileN directory\n");
|
|
exit(1);
|
|
}
|