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NetBSD/usr.bin/xinstall/xinstall.c

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/* $NetBSD: xinstall.c,v 1.20 1997/10/19 14:42:38 mrg Exp $ */
/*
* 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.
*/
#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1987, 1993\n\
The Regents of the University of California. All rights reserved.\n");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)xinstall.c 8.1 (Berkeley) 7/21/93";
#else
__RCSID("$NetBSD: xinstall.c,v 1.20 1997/10/19 14:42:38 mrg Exp $");
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/wait.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <ctype.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 <unistd.h>
#include <err.h>
#include "pathnames.h"
struct passwd *pp;
struct group *gp;
int docopy, dodir, dostrip, dolink;
int mode = S_IRWXU|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH;
char pathbuf[MAXPATHLEN];
uid_t uid;
gid_t gid;
#define LN_ABSOLUTE 0x01
#define LN_RELATIVE 0x02
#define LN_HARD 0x04
#define LN_SYMBOLIC 0x08
#define LN_MIXED 0x10
#define DIRECTORY 0x01 /* Tell install it's a directory. */
#define SETFLAGS 0x02 /* Tell install to set flags. */
void copy __P((int, char *, int, char *, off_t));
void makelink __P((char *, char *));
void install __P((char *, char *, u_long, u_int));
void install_dir __P((char *));
u_long string_to_flags __P((char **, u_long *, u_long *));
void strip __P((char *));
void usage __P((void));
int main __P((int, char *[]));
int
main(argc, argv)
int argc;
char *argv[];
{
struct stat from_sb, to_sb;
mode_t *set;
u_long fset;
u_int iflags;
int ch, no_target;
char *p;
char *flags = NULL, *to_name, *group = NULL, *owner = NULL;
iflags = 0;
while ((ch = getopt(argc, argv, "cf:g:l:m:o:sd")) != EOF)
switch((char)ch) {
case 'c':
docopy = 1;
break;
case 'f':
flags = optarg;
if (string_to_flags(&flags, &fset, NULL))
errx(1, "%s: invalid flag", flags);
iflags |= SETFLAGS;
break;
case 'g':
group = optarg;
break;
case 'm':
if (!(set = setmode(optarg)))
errx(1, "%s: invalid file mode", optarg);
mode = getmode(set, 0);
break;
case 'o':
owner = optarg;
break;
case 's':
dostrip = 1;
break;
case 'd':
dodir = 1;
break;
case 'l':
for (p = optarg; *p; p++)
switch (*p) {
case 's':
dolink &= ~(LN_HARD|LN_MIXED);
dolink |= LN_SYMBOLIC;
break;
case 'h':
dolink &= ~(LN_SYMBOLIC|LN_MIXED);
dolink |= LN_HARD;
break;
case 'm':
dolink &= ~(LN_SYMBOLIC|LN_HARD);
dolink |= LN_MIXED;
break;
case 'a':
dolink &= ~LN_RELATIVE;
dolink |= LN_ABSOLUTE;
break;
case 'r':
dolink &= ~LN_ABSOLUTE;
dolink |= LN_RELATIVE;
break;
default:
errx(1, "%c: invalid link type", *p);
break;
}
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
/* copy and strip options make no sense when creating directories */
if ((docopy || dostrip || dolink) && dodir)
usage();
/* strip and flags make no sense with links */
if ((dostrip || flags) && dolink)
usage();
/* must have at least two arguments, except when creating directories */
if (argc < 2 && !dodir)
usage();
/* get group and owner id's */
if (group && !(gp = getgrnam(group)) && !isdigit(*group))
errx(1, "unknown group %s", group);
gid = (group) ? ((gp) ? gp->gr_gid : atoi(group)) : -1;
if (owner && !(pp = getpwnam(owner)) && !isdigit(*owner))
errx(1, "unknown user %s", owner);
uid = (owner) ? ((pp) ? pp->pw_uid : atoi(owner)) : -1;
if (dodir) {
for (; *argv != NULL; ++argv)
install_dir(*argv);
exit (0);
/* 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)
install(*argv, to_name, fset, iflags | DIRECTORY);
exit(0);
}
/* can't do file1 file2 directory/file */
if (argc != 2)
usage();
if (!no_target) {
if (stat(*argv, &from_sb))
err(1, "%s", *argv);
if (!S_ISREG(to_sb.st_mode))
errx(1, "%s: %s", to_name, strerror(EFTYPE));
if (!dolink && to_sb.st_dev == from_sb.st_dev &&
to_sb.st_ino == from_sb.st_ino)
errx(1, "%s and %s are the same file", *argv, to_name);
/*
* Unlink now... avoid ETXTBSY errors later. Try and turn
* off the append/immutable bits -- if we fail, go ahead,
* it might work.
*/
#define NOCHANGEBITS (UF_IMMUTABLE | UF_APPEND | SF_IMMUTABLE | SF_APPEND)
if (to_sb.st_flags & NOCHANGEBITS)
(void)chflags(to_name,
to_sb.st_flags & ~(NOCHANGEBITS));
(void)unlink(to_name);
}
install(*argv, to_name, fset, iflags);
exit(0);
}
/*
* makelink --
* make a link from source to destination
*/
void
makelink(from_name, to_name)
char *from_name;
char *to_name;
{
char src[MAXPATHLEN], dst[MAXPATHLEN], lnk[MAXPATHLEN];
/* Try hard links first */
if (dolink & (LN_HARD|LN_MIXED)) {
if (link(from_name, to_name) == -1) {
if ((dolink & LN_HARD) || errno != EXDEV)
err(1, "link %s -> %s", from_name, to_name);
}
else
return;
}
/* Symbolic links */
if (dolink & LN_ABSOLUTE) {
/* Convert source path to absolute */
if (realpath(from_name, src) == NULL)
err(1, "%s", src);
if (symlink(src, to_name) == -1)
err(1, "symlink %s -> %s", src, to_name);
return;
}
if (dolink & LN_RELATIVE) {
char *s, *d;
/* Resolve pathnames */
if (realpath(from_name, src) == NULL)
err(1, "%s", src);
if (realpath(to_name, dst) == NULL)
err(1, "%s", dst);
/* trim common path components */
for (s = src, d = dst; *s == *d; s++, d++)
continue;
while (*s != '/')
s--, d--;
/* count the number of directories we need to backtrack */
for (++d, lnk[0] = '\0'; *d; d++)
if (*d == '/')
(void) strcat(lnk, "../");
(void) strcat(lnk, ++s);
if (symlink(lnk, dst) == -1)
err(1, "symlink %s -> %s", lnk, dst);
return;
}
/*
* If absolute or relative was not specified,
* try the names the user provided
*/
if (symlink(from_name, to_name) == -1)
err(1, "symlink %s -> %s", from_name, to_name);
}
/*
* install --
* build a path name and install the file
*/
void
install(from_name, to_name, fset, flags)
char *from_name, *to_name;
u_long fset;
u_int flags;
{
struct stat from_sb, to_sb;
int devnull, from_fd, to_fd, serrno;
char *p;
/* If try to install NULL file to a directory, fails. */
if (flags & DIRECTORY || strcmp(from_name, _PATH_DEVNULL)) {
if (stat(from_name, &from_sb))
err(1, "%s", from_name);
if (!S_ISREG(from_sb.st_mode))
errx(1, "%s: %s", from_name, strerror(EFTYPE));
/* Build the target path. */
if (flags & DIRECTORY) {
(void)snprintf(pathbuf, sizeof(pathbuf), "%s/%s",
to_name,
(p = rindex(from_name, '/')) ? ++p : from_name);
to_name = pathbuf;
}
devnull = 0;
} else {
from_sb.st_flags = 0; /* XXX */
devnull = 1;
}
/*
* Unlink now... avoid ETXTBSY errors later. Try and turn
* off the append/immutable bits -- if we fail, go ahead,
* it might work.
*/
if (stat(to_name, &to_sb) == 0 &&
to_sb.st_flags & (NOCHANGEBITS))
(void)chflags(to_name, to_sb.st_flags & ~(NOCHANGEBITS));
(void)unlink(to_name);
if (dolink) {
makelink(from_name, to_name);
return;
}
/* Create target. */
if ((to_fd = open(to_name,
O_CREAT | O_WRONLY | O_TRUNC, S_IRUSR | S_IWUSR)) < 0)
err(1, "%s", to_name);
if (!devnull) {
if ((from_fd = open(from_name, O_RDONLY, 0)) < 0) {
(void)unlink(to_name);
err(1, "%s", from_name);
}
copy(from_fd, from_name, to_fd, to_name, from_sb.st_size);
(void)close(from_fd);
}
if (dostrip) {
strip(to_name);
/*
* Re-open our fd on the target, in case we used a strip
* that does not work in-place -- like gnu binutils strip.
*/
close(to_fd);
if ((to_fd = open(to_name, O_RDONLY, S_IRUSR | S_IWUSR)) < 0)
err(1, "stripping %s", to_name);
}
/*
* Set owner, group, mode for target; do the chown first,
* chown may lose the setuid bits.
*/
if ((gid != -1 || uid != -1) && fchown(to_fd, uid, gid)) {
serrno = errno;
(void)unlink(to_name);
errx(1, "%s: chown/chgrp: %s", to_name, strerror(serrno));
}
if (fchmod(to_fd, mode)) {
serrno = errno;
(void)unlink(to_name);
errx(1, "%s: chmod: %s", to_name, strerror(serrno));
}
/*
* If provided a set of flags, set them, otherwise, preserve the
* flags, except for the dump flag.
*/
if (fchflags(to_fd,
flags & SETFLAGS ? fset : from_sb.st_flags & ~UF_NODUMP)) {
if (errno != EOPNOTSUPP || (from_sb.st_flags & ~UF_NODUMP) != 0)
warn("%s: chflags", to_name);
}
(void)close(to_fd);
if (!docopy && !devnull && unlink(from_name))
err(1, "%s", from_name);
}
/*
* copy --
* copy from one file to another
*/
void
copy(from_fd, from_name, to_fd, to_name, size)
int from_fd, to_fd;
char *from_name, *to_name;
off_t size;
{
int nr, nw;
int serrno;
char *p;
char buf[MAXBSIZE];
/*
* 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.
*/
if (size <= 8 * 1048576) {
if ((p = mmap(NULL, (size_t)size, PROT_READ,
0, from_fd, (off_t)0)) == (char *)-1)
err(1, "%s", from_name);
if (write(to_fd, p, size) != size)
err(1, "%s", to_name);
} else {
while ((nr = read(from_fd, buf, sizeof(buf))) > 0)
if ((nw = write(to_fd, buf, nr)) != nr) {
serrno = errno;
(void)unlink(to_name);
errx(1, "%s: %s",
to_name, strerror(nw > 0 ? EIO : serrno));
}
if (nr != 0) {
serrno = errno;
(void)unlink(to_name);
errx(1, "%s: %s", from_name, strerror(serrno));
}
}
}
/*
* strip --
* use strip(1) to strip the target file
*/
void
strip(to_name)
char *to_name;
{
int serrno, status;
char *stripprog;
switch (vfork()) {
case -1:
serrno = errno;
(void)unlink(to_name);
errx(1, "forks: %s", strerror(errno));
case 0:
stripprog = getenv("STRIP");
if (stripprog == NULL)
stripprog = _PATH_STRIP;
execl(stripprog, "strip", to_name, NULL);
err(1, "%s", stripprog);
default:
if (wait(&status) == -1 || status)
(void)unlink(to_name);
}
}
/*
* install_dir --
* build directory heirarchy
*/
void
install_dir(path)
char *path;
{
char *p;
struct stat sb;
int ch;
for (p = path;; ++p)
if (!*p || (p != path && *p == '/')) {
ch = *p;
*p = '\0';
if (stat(path, &sb)) {
if (errno != ENOENT || mkdir(path, 0777) < 0) {
err(1, "%s", path);
/* NOTREACHED */
}
}
if (!(*p = ch))
break;
}
if (((gid != -1 || uid != -1) && chown(path, uid, gid)) ||
chmod(path, mode)) {
warn("%s", path);
}
}
/*
* usage --
* print a usage message and die
*/
void
usage()
{
(void)fprintf(stderr, "\
usage: install [-cs] [-f flags] [-g group] [-m mode] [-o owner] file1 file2\n\
install [-cs] [-f flags] [-g group] [-m mode] [-o owner] file1 ... fileN directory\n\
install -d [-g group] [-m mode] [-o owner] directory ...\n");
exit(1);
}
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