519 lines
13 KiB
C
519 lines
13 KiB
C
/* $NetBSD: xinstall.c,v 1.22 1997/10/27 23:16:34 thorpej Exp $ */
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/*
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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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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) 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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#if 0
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static char sccsid[] = "@(#)xinstall.c 8.1 (Berkeley) 7/21/93";
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#else
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__RCSID("$NetBSD: xinstall.c,v 1.22 1997/10/27 23:16:34 thorpej Exp $");
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#endif
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#endif /* not lint */
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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 <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 <unistd.h>
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#include <err.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 docopy, dodir, dostrip, dolink;
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int mode = S_IRWXU|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH;
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char pathbuf[MAXPATHLEN];
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uid_t uid;
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gid_t gid;
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#define LN_ABSOLUTE 0x01
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#define LN_RELATIVE 0x02
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#define LN_HARD 0x04
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#define LN_SYMBOLIC 0x08
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#define LN_MIXED 0x10
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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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void copy __P((int, char *, int, char *, off_t));
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void makelink __P((char *, char *));
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void install __P((char *, char *, u_long, u_int));
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void install_dir __P((char *));
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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 main __P((int, char *[]));
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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 *p;
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char *flags = NULL, *to_name, *group = NULL, *owner = NULL;
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iflags = 0;
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while ((ch = getopt(argc, argv, "cf:g:l:m:o:sd")) != -1)
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switch((char)ch) {
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case 'c':
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docopy = 1;
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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(1, "%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(1, "%s: invalid file mode", 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 's':
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dostrip = 1;
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break;
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case 'd':
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dodir = 1;
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break;
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case 'l':
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for (p = optarg; *p; p++)
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switch (*p) {
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case 's':
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dolink &= ~(LN_HARD|LN_MIXED);
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dolink |= LN_SYMBOLIC;
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break;
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case 'h':
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dolink &= ~(LN_SYMBOLIC|LN_MIXED);
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dolink |= LN_HARD;
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break;
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case 'm':
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dolink &= ~(LN_SYMBOLIC|LN_HARD);
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dolink |= LN_MIXED;
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break;
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case 'a':
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dolink &= ~LN_RELATIVE;
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dolink |= LN_ABSOLUTE;
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break;
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case 'r':
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dolink &= ~LN_ABSOLUTE;
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dolink |= LN_RELATIVE;
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break;
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default:
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errx(1, "%c: invalid link type", *p);
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break;
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}
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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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/* copy and strip options make no sense when creating directories */
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if ((docopy || dostrip || dolink) && dodir)
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usage();
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/* strip and flags make no sense with links */
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if ((dostrip || flags) && dolink)
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usage();
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/* must have at least two arguments, except when creating directories */
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if (argc < 2 && !dodir)
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usage();
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/* get group and owner id's */
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if (group && !(gp = getgrnam(group)) && !isdigit(*group))
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errx(1, "unknown group %s", group);
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gid = (group) ? ((gp) ? gp->gr_gid : atoi(group)) : -1;
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if (owner && !(pp = getpwnam(owner)) && !isdigit(*owner))
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errx(1, "unknown user %s", owner);
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uid = (owner) ? ((pp) ? pp->pw_uid : atoi(owner)) : -1;
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if (dodir) {
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for (; *argv != NULL; ++argv)
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install_dir(*argv);
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exit (0);
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/* NOTREACHED */
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}
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no_target = stat(to_name = argv[argc - 1], &to_sb);
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if (!no_target && S_ISDIR(to_sb.st_mode)) {
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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(1, "%s", *argv);
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if (!S_ISREG(to_sb.st_mode))
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errx(1, "%s: %s", to_name, strerror(EFTYPE));
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if (!dolink && 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(1, "%s and %s are the same file", *argv, to_name);
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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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#define NOCHANGEBITS (UF_IMMUTABLE | UF_APPEND | SF_IMMUTABLE | SF_APPEND)
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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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}
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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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* makelink --
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* make a link from source to destination
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*/
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void
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makelink(from_name, to_name)
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char *from_name;
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char *to_name;
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{
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char src[MAXPATHLEN], dst[MAXPATHLEN], lnk[MAXPATHLEN];
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/* Try hard links first */
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if (dolink & (LN_HARD|LN_MIXED)) {
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if (link(from_name, to_name) == -1) {
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if ((dolink & LN_HARD) || errno != EXDEV)
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err(1, "link %s -> %s", from_name, to_name);
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}
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else
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return;
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}
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/* Symbolic links */
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if (dolink & LN_ABSOLUTE) {
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/* Convert source path to absolute */
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if (realpath(from_name, src) == NULL)
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err(1, "%s", src);
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if (symlink(src, to_name) == -1)
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err(1, "symlink %s -> %s", src, to_name);
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return;
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}
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if (dolink & LN_RELATIVE) {
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char *s, *d;
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/* Resolve pathnames */
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if (realpath(from_name, src) == NULL)
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err(1, "%s", src);
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if (realpath(to_name, dst) == NULL)
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err(1, "%s", dst);
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/* trim common path components */
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for (s = src, d = dst; *s == *d; s++, d++)
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continue;
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while (*s != '/')
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s--, d--;
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/* count the number of directories we need to backtrack */
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for (++d, lnk[0] = '\0'; *d; d++)
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if (*d == '/')
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(void) strcat(lnk, "../");
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(void) strcat(lnk, ++s);
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if (symlink(lnk, dst) == -1)
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err(1, "symlink %s -> %s", lnk, dst);
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return;
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}
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/*
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* If absolute or relative was not specified,
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* try the names the user provided
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*/
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if (symlink(from_name, to_name) == -1)
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err(1, "symlink %s -> %s", from_name, to_name);
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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;
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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(1, "%s", from_name);
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if (!S_ISREG(from_sb.st_mode))
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errx(1, "%s: %s", from_name, strerror(EFTYPE));
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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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/*
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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 (stat(to_name, &to_sb) == 0 &&
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to_sb.st_flags & (NOCHANGEBITS))
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(void)chflags(to_name, to_sb.st_flags & ~(NOCHANGEBITS));
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(void)unlink(to_name);
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if (dolink) {
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makelink(from_name, to_name);
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return;
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}
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/* Create target. */
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if ((to_fd = open(to_name,
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O_CREAT | O_WRONLY | O_TRUNC, S_IRUSR | S_IWUSR)) < 0)
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err(1, "%s", to_name);
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if (!devnull) {
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if ((from_fd = open(from_name, O_RDONLY, 0)) < 0) {
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(void)unlink(to_name);
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err(1, "%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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* Re-open our fd on the target, in case we used a strip
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* that does not work in-place -- like gnu binutils strip.
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*/
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close(to_fd);
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if ((to_fd = open(to_name, O_RDONLY, S_IRUSR | S_IWUSR)) < 0)
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err(1, "stripping %s", 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 ((gid != -1 || uid != -1) && fchown(to_fd, uid, gid)) {
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serrno = errno;
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(void)unlink(to_name);
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errx(1, "%s: chown/chgrp: %s", to_name, strerror(serrno));
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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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errx(1, "%s: chmod: %s", to_name, strerror(serrno));
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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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if (errno != EOPNOTSUPP || (from_sb.st_flags & ~UF_NODUMP) != 0)
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warn("%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(1, "%s", from_name);
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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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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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int nr, nw;
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int serrno;
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char *p;
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char 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(1, "%s", from_name);
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if (write(to_fd, p, size) != size)
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err(1, "%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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errx(1, "%s: %s",
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to_name, strerror(nw > 0 ? EIO : serrno));
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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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errx(1, "%s: %s", from_name, strerror(serrno));
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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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char *stripprog;
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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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errx(1, "vfork: %s", strerror(serrno));
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case 0:
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stripprog = getenv("STRIP");
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if (stripprog == NULL)
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stripprog = _PATH_STRIP;
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execl(stripprog, "strip", to_name, NULL);
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warn("%s", stripprog);
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_exit(1);
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default:
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if (wait(&status) == -1 || status)
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(void)unlink(to_name);
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}
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}
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/*
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* install_dir --
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* build directory heirarchy
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*/
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void
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install_dir(path)
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char *path;
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{
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char *p;
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struct stat sb;
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int ch;
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for (p = path;; ++p)
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if (!*p || (p != path && *p == '/')) {
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ch = *p;
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*p = '\0';
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if (stat(path, &sb)) {
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if (errno != ENOENT || mkdir(path, 0777) < 0) {
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err(1, "%s", path);
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/* NOTREACHED */
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}
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}
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if (!(*p = ch))
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break;
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}
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if (((gid != -1 || uid != -1) && chown(path, uid, gid)) ||
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chmod(path, mode)) {
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warn("%s", path);
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}
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}
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/*
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* usage --
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* print a usage message and die
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*/
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void
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usage()
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{
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(void)fprintf(stderr, "\
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usage: install [-cs] [-f flags] [-g group] [-m mode] [-o owner] file1 file2\n\
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install [-cs] [-f flags] [-g group] [-m mode] [-o owner] file1 ... fileN directory\n\
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install -d [-g group] [-m mode] [-o owner] directory ...\n");
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exit(1);
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}
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