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NetBSD/usr.bin/xinstall/xinstall.c
rillig 5a14d4c6bd install(1): copy metachar table from usr.bin/make 
It is not worth having a dependency on usr.bin/make just for including
this small table.  The header file usr.bin/make/make.h, which is
included for consistency with the rest of the usr.bin/make code, is
using inline functions a lot and refers to several parts of make that
are completely irrelevant to usr.bin/install.
2020-10-30 20:05:00 +00:00

1373 lines
34 KiB
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/* $NetBSD: xinstall.c,v 1.126 2020/10/30 20:05:00 rillig 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. 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.
*/
/*-
* Copyright (c) 2015 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#define __MKTEMP_OK__ /* All uses of mktemp have been checked */
#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#else
#define HAVE_FUTIMES 1
#define HAVE_STRUCT_STAT_ST_FLAGS 1
#endif
#include <sys/cdefs.h>
#if defined(__COPYRIGHT) && !defined(lint)
__COPYRIGHT("@(#) Copyright (c) 1987, 1993\
The Regents of the University of California. All rights reserved.");
#endif /* not lint */
#if defined(__RCSID) && !defined(lint)
#if 0
static char sccsid[] = "@(#)xinstall.c 8.1 (Berkeley) 7/21/93";
#else
__RCSID("$NetBSD: xinstall.c,v 1.126 2020/10/30 20:05:00 rillig Exp $");
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <sys/time.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <grp.h>
#include <libgen.h>
#include <paths.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <util.h>
#include <vis.h>
#ifdef HAVE_POSIX_SPAWN
#include <spawn.h>
#endif
#include <md5.h>
#include <rmd160.h>
#include <sha1.h>
#include <sha2.h>
#include "pathnames.h"
#include "mtree.h"
#define BACKUP_SUFFIX ".old"
static int dobackup, dodir, dostrip, dolink, dopreserve, dorename, dounpriv;
static int haveopt_f, haveopt_g, haveopt_m, haveopt_o;
static int numberedbackup;
static int mode = S_IRWXU|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH;
static char pathbuf[MAXPATHLEN];
static uid_t uid = -1;
static gid_t gid = -1;
static char *group, *owner, *fflags, *tags;
static FILE *metafp;
static char *metafile;
static u_long fileflags;
static char *stripArgs;
static char *afterinstallcmd;
static const char *suffix = BACKUP_SUFFIX;
static char *destdir;
enum {
DIGEST_NONE = 0,
DIGEST_MD5,
DIGEST_RMD160,
DIGEST_SHA1,
DIGEST_SHA256,
DIGEST_SHA384,
DIGEST_SHA512,
} digesttype = DIGEST_NONE;
static char *digest;
#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. */
#define HASUID 0x04 /* Tell install the uid was given */
#define HASGID 0x08 /* Tell install the gid was given */
static void afterinstall(const char *, const char *, int);
static void backup(const char *);
static char *copy(int, char *, int, char *, off_t);
static int do_link(char *, char *);
static void do_symlink(char *, char *);
static void install(char *, char *, u_int);
static void install_dir(char *, u_int);
static void makelink(char *, char *);
static void metadata_log(const char *, const char *, struct timeval *,
const char *, const char *, off_t);
static int parseid(char *, id_t *);
static void run(const char *, const char *, const char *, int);
static void strip(const char *);
__dead static void usage(void);
static char *xbasename(char *);
static char *xdirname(char *);
static int needshell(const char *, int);
int
main(int argc, char *argv[])
{
struct stat from_sb, to_sb;
void *set;
u_int iflags;
int ch, no_target;
char *p, *to_name;
setprogname(argv[0]);
iflags = 0;
while ((ch = getopt(argc, argv, "a:cbB:dD:f:g:h:l:m:M:N:o:prsS:T:U"))
!= -1)
switch((char)ch) {
case 'a':
afterinstallcmd = strdup(optarg);
if (afterinstallcmd == NULL)
err(EXIT_FAILURE,
"Can't allocate after command");
break;
case 'B':
suffix = optarg;
numberedbackup = 0;
{
/* Check if given suffix really generates
different suffixes - catch e.g. ".%" */
char suffix_expanded0[FILENAME_MAX],
suffix_expanded1[FILENAME_MAX];
(void)snprintf(suffix_expanded0, FILENAME_MAX,
suffix, 0);
(void)snprintf(suffix_expanded1, FILENAME_MAX,
suffix, 1);
if (strcmp(suffix_expanded0, suffix_expanded1)
!= 0)
numberedbackup = 1;
}
/* fall through; -B implies -b */
/*FALLTHROUGH*/
case 'b':
dobackup = 1;
break;
case 'c':
/* ignored; was "docopy" which is now the default. */
break;
case 'd':
dodir = 1;
break;
case 'D':
destdir = optarg;
break;
#if ! HAVE_NBTOOL_CONFIG_H
case 'f':
haveopt_f = 1;
fflags = optarg;
break;
#endif
case 'g':
haveopt_g = 1;
group = optarg;
break;
case 'h':
digest = optarg;
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(EXIT_FAILURE, "%c: invalid link type", *p);
/* NOTREACHED */
}
break;
case 'm':
haveopt_m = 1;
if (!(set = setmode(optarg)))
err(EXIT_FAILURE, "Cannot set file mode `%s'", optarg);
mode = getmode(set, 0);
free(set);
break;
case 'M':
metafile = optarg;
break;
case 'N':
if (! setup_getid(optarg))
errx(EXIT_FAILURE,
"Unable to use user and group databases in `%s'",
optarg);
break;
case 'o':
haveopt_o = 1;
owner = optarg;
break;
case 'p':
dopreserve = 1;
break;
case 'r':
dorename = 1;
break;
case 'S':
stripArgs = strdup(optarg);
if (stripArgs == NULL)
err(EXIT_FAILURE, "Can't allocate options");
/* fall through; -S implies -s */
/*FALLTHROUGH*/
case 's':
dostrip = 1;
break;
case 'T':
tags = optarg;
break;
case 'U':
dounpriv = 1;
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
/* strip and link options make no sense when creating directories */
if ((dostrip || dolink) && dodir)
usage();
/* strip and flags make no sense with links */
if ((dostrip || fflags) && dolink)
usage();
/* must have at least two arguments, except when creating directories */
if (argc < 2 && !dodir)
usage();
if (digest) {
if (0) {
} else if (strcmp(digest, "none") == 0) {
digesttype = DIGEST_NONE;
} else if (strcmp(digest, "md5") == 0) {
digesttype = DIGEST_MD5;
} else if (strcmp(digest, "rmd160") == 0) {
digesttype = DIGEST_RMD160;
} else if (strcmp(digest, "sha1") == 0) {
digesttype = DIGEST_SHA1;
} else if (strcmp(digest, "sha256") == 0) {
digesttype = DIGEST_SHA256;
} else if (strcmp(digest, "sha384") == 0) {
digesttype = DIGEST_SHA384;
} else if (strcmp(digest, "sha512") == 0) {
digesttype = DIGEST_SHA512;
} else {
warnx("unknown digest `%s'", digest);
usage();
}
}
/* get group and owner id's */
if (group && !dounpriv) {
if (gid_from_group(group, &gid) == -1) {
id_t id;
if (!parseid(group, &id))
errx(EXIT_FAILURE, "unknown group %s", group);
gid = id;
}
iflags |= HASGID;
}
if (owner && !dounpriv) {
if (uid_from_user(owner, &uid) == -1) {
id_t id;
if (!parseid(owner, &id))
errx(EXIT_FAILURE, "unknown user %s", owner);
uid = id;
}
iflags |= HASUID;
}
#if ! HAVE_NBTOOL_CONFIG_H
if (fflags && !dounpriv) {
if (string_to_flags(&fflags, &fileflags, NULL))
errx(EXIT_FAILURE, "%s: invalid flag", fflags);
/* restore fflags since string_to_flags() changed it */
fflags = flags_to_string(fileflags, "-");
iflags |= SETFLAGS;
}
#endif
if (metafile) {
if ((metafp = fopen(metafile, "a")) == NULL)
warn("open %s", metafile);
} else
digesttype = DIGEST_NONE;
if (dodir) {
for (; *argv != NULL; ++argv)
install_dir(*argv, iflags);
exit (0);
}
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, iflags | DIRECTORY);
exit(0);
}
/* can't do file1 file2 directory/file */
if (argc != 2) {
errx(EXIT_FAILURE, "the last argument (%s) "
"must name an existing directory", argv[argc - 1]);
/* NOTREACHED */
}
if (!no_target) {
/* makelink() handles checks for links */
if (!dolink) {
if (stat(*argv, &from_sb))
err(EXIT_FAILURE, "%s: stat", *argv);
if (!S_ISREG(to_sb.st_mode))
errx(EXIT_FAILURE, "%s: not a regular file", to_name);
if (to_sb.st_dev == from_sb.st_dev &&
to_sb.st_ino == from_sb.st_ino)
errx(EXIT_FAILURE, "%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.
*/
#if ! HAVE_NBTOOL_CONFIG_H
#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));
#endif
if (dobackup)
backup(to_name);
else if (!dorename)
(void)unlink(to_name);
}
install(*argv, to_name, iflags);
exit(0);
}
/*
* parseid --
* parse uid or gid from arg into id, returning non-zero if successful
*/
static int
parseid(char *name, id_t *id)
{
char *ep;
errno = 0;
*id = (id_t)strtoul(name, &ep, 10);
if (errno || *ep != '\0')
return (0);
return (1);
}
/*
* do_link --
* make a hard link, obeying dorename if set
* return -1 on failure
*/
static int
do_link(char *from_name, char *to_name)
{
char tmpl[MAXPATHLEN];
int ret;
if (dorename) {
(void)snprintf(tmpl, sizeof(tmpl), "%s.inst.XXXXXX", to_name);
/* This usage is safe. */
if (mktemp(tmpl) == NULL)
err(EXIT_FAILURE, "%s: mktemp", tmpl);
ret = link(from_name, tmpl);
if (ret == 0) {
ret = rename(tmpl, to_name);
/* If rename has posix semantics, then the temporary
* file may still exist when from_name and to_name point
* to the same file, so unlink it unconditionally.
*/
(void)unlink(tmpl);
}
return (ret);
} else
return (link(from_name, to_name));
}
/*
* do_symlink --
* make a symbolic link, obeying dorename if set
* exit on failure
*/
static void
do_symlink(char *from_name, char *to_name)
{
char tmpl[MAXPATHLEN];
if (dorename) {
(void)snprintf(tmpl, sizeof(tmpl), "%s.inst.XXXXXX", to_name);
/* This usage is safe. */
if (mktemp(tmpl) == NULL)
err(EXIT_FAILURE, "%s: mktemp", tmpl);
if (symlink(from_name, tmpl) == -1)
err(EXIT_FAILURE, "symlink %s -> %s", from_name, tmpl);
if (rename(tmpl, to_name) == -1) {
/* remove temporary link before exiting */
(void)unlink(tmpl);
err(EXIT_FAILURE, "%s: rename", to_name);
}
} else {
if (symlink(from_name, to_name) == -1)
err(EXIT_FAILURE, "symlink %s -> %s", from_name, to_name);
}
}
/*
* makelink --
* make a link from source to destination
*/
static void
makelink(char *from_name, char *to_name)
{
char src[MAXPATHLEN], dst[MAXPATHLEN], lnk[MAXPATHLEN];
struct stat to_sb;
/* Try hard links first */
if (dolink & (LN_HARD|LN_MIXED)) {
if (do_link(from_name, to_name) == -1) {
if ((dolink & LN_HARD) || errno != EXDEV)
err(EXIT_FAILURE, "link %s -> %s", from_name, to_name);
} else {
if (stat(to_name, &to_sb))
err(EXIT_FAILURE, "%s: stat", to_name);
if (S_ISREG(to_sb.st_mode)) {
/* XXX: hard links to anything
* other than plain files are not
* metalogged
*/
int omode;
char *oowner, *ogroup, *offlags;
char *dres;
/* XXX: use underlying perms,
* unless overridden on command line.
*/
omode = mode;
if (!haveopt_m)
mode = (to_sb.st_mode & 0777);
oowner = owner;
if (!haveopt_o)
owner = NULL;
ogroup = group;
if (!haveopt_g)
group = NULL;
offlags = fflags;
if (!haveopt_f)
fflags = NULL;
switch (digesttype) {
case DIGEST_MD5:
dres = MD5File(from_name, NULL);
break;
case DIGEST_RMD160:
dres = RMD160File(from_name, NULL);
break;
case DIGEST_SHA1:
dres = SHA1File(from_name, NULL);
break;
case DIGEST_SHA256:
dres = SHA256_File(from_name, NULL);
break;
case DIGEST_SHA384:
dres = SHA384_File(from_name, NULL);
break;
case DIGEST_SHA512:
dres = SHA512_File(from_name, NULL);
break;
default:
dres = NULL;
}
metadata_log(to_name, "file", NULL, NULL,
dres, to_sb.st_size);
free(dres);
mode = omode;
owner = oowner;
group = ogroup;
fflags = offlags;
}
return;
}
}
/* Symbolic links */
if (dolink & LN_ABSOLUTE) {
/* Convert source path to absolute */
if (realpath(from_name, src) == NULL)
err(EXIT_FAILURE, "%s: realpath", from_name);
do_symlink(src, to_name);
/* XXX: src may point outside of destdir */
metadata_log(to_name, "link", NULL, src, NULL, 0);
return;
}
if (dolink & LN_RELATIVE) {
char *cp, *d, *s;
/* Resolve pathnames */
if (realpath(from_name, src) == NULL)
err(EXIT_FAILURE, "%s: realpath", from_name);
/*
* The last component of to_name may be a symlink,
* so use realpath to resolve only the directory.
*/
cp = xdirname(to_name);
if (realpath(cp, dst) == NULL)
err(EXIT_FAILURE, "%s: realpath", cp);
/* .. and add the last component */
if (strcmp(dst, "/") != 0) {
if (strlcat(dst, "/", sizeof(dst)) > sizeof(dst))
errx(EXIT_FAILURE, "resolved pathname too long");
}
cp = xbasename(to_name);
if (strlcat(dst, cp, sizeof(dst)) > sizeof(dst))
errx(EXIT_FAILURE, "resolved pathname too long");
/* 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)strlcat(lnk, "../", sizeof(lnk));
(void)strlcat(lnk, ++s, sizeof(lnk));
do_symlink(lnk, to_name);
/* XXX: lnk may point outside of destdir */
metadata_log(to_name, "link", NULL, lnk, NULL, 0);
return;
}
/*
* If absolute or relative was not specified,
* try the names the user provided
*/
do_symlink(from_name, to_name);
/* XXX: from_name may point outside of destdir */
metadata_log(to_name, "link", NULL, from_name, NULL, 0);
}
/*
* install --
* build a path name and install the file
*/
static void
install(char *from_name, char *to_name, u_int flags)
{
struct stat from_sb;
struct stat to_sb;
struct timeval tv[2];
off_t size;
int devnull, from_fd, to_fd, serrno, tmpmode;
char *p, tmpl[MAXPATHLEN], *oto_name, *digestresult;
size = -1;
if (!dolink) {
/* ensure that from_sb & tv are sane if !dolink */
if (stat(from_name, &from_sb))
err(EXIT_FAILURE, "%s: stat", from_name);
size = from_sb.st_size;
#if BSD4_4 && !HAVE_NBTOOL_CONFIG_H
TIMESPEC_TO_TIMEVAL(&tv[0], &from_sb.st_atimespec);
TIMESPEC_TO_TIMEVAL(&tv[1], &from_sb.st_mtimespec);
#else
tv[0].tv_sec = from_sb.st_atime;
tv[0].tv_usec = 0;
tv[1].tv_sec = from_sb.st_mtime;
tv[1].tv_usec = 0;
#endif
}
if (flags & DIRECTORY || strcmp(from_name, _PATH_DEVNULL) != 0) {
devnull = 0;
if (!dolink) {
if (!S_ISREG(from_sb.st_mode))
errx(EXIT_FAILURE, "%s: not a regular file", from_name);
}
/* Build the target path. */
if (flags & DIRECTORY) {
(void)snprintf(pathbuf, sizeof(pathbuf), "%s/%s",
to_name,
(p = strrchr(from_name, '/')) ? ++p : from_name);
to_name = pathbuf;
}
} else {
devnull = 1;
size = 0;
#if HAVE_STRUCT_STAT_ST_FLAGS
from_sb.st_flags = 0; /* XXX */
#endif
}
/*
* Unlink now... avoid ETXTBSY errors later. Try and turn
* off the append/immutable bits -- if we fail, go ahead,
* it might work.
*/
#if ! HAVE_NBTOOL_CONFIG_H
if (stat(to_name, &to_sb) == 0 &&
to_sb.st_flags & (NOCHANGEBITS))
(void)chflags(to_name, to_sb.st_flags & ~(NOCHANGEBITS));
#endif
if (dorename) {
(void)snprintf(tmpl, sizeof(tmpl), "%s.inst.XXXXXX", to_name);
oto_name = to_name;
to_name = tmpl;
} else {
oto_name = NULL; /* pacify gcc */
if (dobackup)
backup(to_name);
else
(void)unlink(to_name);
}
if (dolink) {
makelink(from_name, dorename ? oto_name : to_name);
return;
}
/* Create target. */
if (dorename) {
if ((to_fd = mkstemp(to_name)) == -1)
err(EXIT_FAILURE, "%s: mkstemp", to_name);
} else {
if ((to_fd = open(to_name,
O_CREAT | O_WRONLY | O_TRUNC, S_IRUSR | S_IWUSR)) < 0)
err(EXIT_FAILURE, "%s: open", to_name);
}
digestresult = NULL;
if (!devnull) {
if ((from_fd = open(from_name, O_RDONLY, 0)) < 0) {
(void)unlink(to_name);
err(EXIT_FAILURE, "%s: open", from_name);
}
digestresult =
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(EXIT_FAILURE, "stripping %s", to_name);
/*
* Recalculate size and digestresult after stripping.
*/
if (fstat(to_fd, &to_sb) != 0)
err(EXIT_FAILURE, "%s: fstat", to_name);
size = to_sb.st_size;
digestresult =
copy(to_fd, to_name, -1, NULL, size);
}
if (afterinstallcmd != NULL) {
afterinstall(afterinstallcmd, to_name, 1);
/*
* Re-open our fd on the target, in case we used an
* after-install command that does not work in-place
*/
close(to_fd);
if ((to_fd = open(to_name, O_RDONLY, S_IRUSR | S_IWUSR)) < 0)
err(EXIT_FAILURE, "running after install command on %s", to_name);
}
/*
* Set owner, group, mode for target; do the chown first,
* chown may lose the setuid bits.
*/
if (!dounpriv &&
(flags & (HASUID | HASGID)) && fchown(to_fd, uid, gid) == -1) {
serrno = errno;
(void)unlink(to_name);
errc(EXIT_FAILURE, serrno, "%s: chown/chgrp", to_name);
}
tmpmode = mode;
if (dounpriv)
tmpmode &= S_IRWXU|S_IRWXG|S_IRWXO;
if (fchmod(to_fd, tmpmode) == -1) {
serrno = errno;
(void)unlink(to_name);
errc(EXIT_FAILURE, serrno, "%s: chmod", to_name);
}
/*
* Preserve the date of the source file.
*/
if (dopreserve) {
#if HAVE_FUTIMES
if (futimes(to_fd, tv) == -1)
warn("%s: futimes", to_name);
#else
if (utimes(to_name, tv) == -1)
warn("%s: utimes", to_name);
#endif
}
(void)close(to_fd);
if (dorename) {
if (rename(to_name, oto_name) == -1)
err(EXIT_FAILURE, "%s: rename", to_name);
to_name = oto_name;
}
/*
* If provided a set of flags, set them, otherwise, preserve the
* flags, except for the dump flag.
*/
#if ! HAVE_NBTOOL_CONFIG_H
if (!dounpriv && chflags(to_name,
flags & SETFLAGS ? fileflags : from_sb.st_flags & ~UF_NODUMP) == -1)
{
if (errno != EOPNOTSUPP || (from_sb.st_flags & ~UF_NODUMP) != 0)
warn("%s: chflags", to_name);
}
#endif
metadata_log(to_name, "file", tv, NULL, digestresult, size);
free(digestresult);
}
/*
* copy --
* copy from one file to another, returning a digest.
*
* If to_fd < 0, just calculate a digest, don't copy.
*/
static char *
copy(int from_fd, char *from_name, int to_fd, char *to_name, off_t size)
{
ssize_t nr, nw;
int serrno;
u_char *p;
u_char buf[MAXBSIZE];
MD5_CTX ctxMD5;
RMD160_CTX ctxRMD160;
SHA1_CTX ctxSHA1;
SHA256_CTX ctxSHA256;
SHA384_CTX ctxSHA384;
SHA512_CTX ctxSHA512;
switch (digesttype) {
case DIGEST_MD5:
MD5Init(&ctxMD5);
break;
case DIGEST_RMD160:
RMD160Init(&ctxRMD160);
break;
case DIGEST_SHA1:
SHA1Init(&ctxSHA1);
break;
case DIGEST_SHA256:
SHA256_Init(&ctxSHA256);
break;
case DIGEST_SHA384:
SHA384_Init(&ctxSHA384);
break;
case DIGEST_SHA512:
SHA512_Init(&ctxSHA512);
break;
case DIGEST_NONE:
if (to_fd < 0)
return NULL; /* no need to do anything */
default:
break;
}
/*
* There's no reason to do anything other than close the file
* now if it's empty, so let's not bother.
*/
if (size > 0) {
/*
* 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,
MAP_FILE|MAP_SHARED, from_fd, (off_t)0))
== MAP_FAILED) {
goto mmap_failed;
}
#if defined(MADV_SEQUENTIAL) && !defined(__APPLE__)
if (madvise(p, (size_t)size, MADV_SEQUENTIAL) == -1
&& errno != EOPNOTSUPP)
warn("madvise");
#endif
if (to_fd >= 0 && write(to_fd, p, size) != size) {
serrno = errno;
(void)unlink(to_name);
errc(EXIT_FAILURE, serrno, "%s: write",
to_name);
}
switch (digesttype) {
case DIGEST_MD5:
MD5Update(&ctxMD5, p, size);
break;
case DIGEST_RMD160:
RMD160Update(&ctxRMD160, p, size);
break;
case DIGEST_SHA1:
SHA1Update(&ctxSHA1, p, size);
break;
case DIGEST_SHA256:
SHA256_Update(&ctxSHA256, p, size);
break;
case DIGEST_SHA384:
SHA384_Update(&ctxSHA384, p, size);
break;
case DIGEST_SHA512:
SHA512_Update(&ctxSHA512, p, size);
break;
default:
break;
}
(void)munmap(p, size);
} else {
mmap_failed:
while ((nr = read(from_fd, buf, sizeof(buf))) > 0) {
if (to_fd >= 0 &&
(nw = write(to_fd, buf, nr)) != nr) {
serrno = errno;
(void)unlink(to_name);
errc(EXIT_FAILURE,
nw > 0 ? EIO : serrno,
"%s: write", to_name);
}
switch (digesttype) {
case DIGEST_MD5:
MD5Update(&ctxMD5, buf, nr);
break;
case DIGEST_RMD160:
RMD160Update(&ctxRMD160, buf, nr);
break;
case DIGEST_SHA1:
SHA1Update(&ctxSHA1, buf, nr);
break;
case DIGEST_SHA256:
SHA256_Update(&ctxSHA256, buf, nr);
break;
case DIGEST_SHA384:
SHA384_Update(&ctxSHA384, buf, nr);
break;
case DIGEST_SHA512:
SHA512_Update(&ctxSHA512, buf, nr);
break;
default:
break;
}
}
if (nr != 0) {
serrno = errno;
(void)unlink(to_name);
errc(EXIT_FAILURE, serrno, "%s: read",
from_name);
}
}
}
switch (digesttype) {
case DIGEST_MD5:
return MD5End(&ctxMD5, NULL);
case DIGEST_RMD160:
return RMD160End(&ctxRMD160, NULL);
case DIGEST_SHA1:
return SHA1End(&ctxSHA1, NULL);
case DIGEST_SHA256:
return SHA256_End(&ctxSHA256, NULL);
case DIGEST_SHA384:
return SHA384_End(&ctxSHA384, NULL);
case DIGEST_SHA512:
return SHA512_End(&ctxSHA512, NULL);
default:
return NULL;
}
}
static void
run(const char *command, const char *flags, const char *to_name, int errunlink)
{
char *args[4];
char *cmd;
int status;
int rv;
size_t i;
i = 1;
status = 0;
if (needshell(command, 1)) {
rv = asprintf(&cmd, "%s %s%s%s", command, flags ? flags : "",
flags ? " " : "", to_name);
if (rv < 0) {
warn("Cannot execute %s", command);
goto out;
}
command = _PATH_BSHELL;
flags = "-c";
} else
cmd = __UNCONST(to_name);
args[0] = __UNCONST(command);
if (flags)
args[i++] = __UNCONST(flags);
args[i++] = cmd;
args[i] = NULL;
#ifdef HAVE_POSIX_SPAWN
if (*command == '/')
rv = posix_spawn(NULL, command, NULL, NULL, args, NULL);
else
rv = posix_spawnp(NULL, command, NULL, NULL, args, NULL);
if (rv != 0)
warnc(rv, "Cannot execute %s", command);
/*
* the wait below will fail if we did not create a child it will
* make rv negative.
*/
#else
switch (vfork()) {
case -1:
rv = errno;
if (errunlink)
(void)unlink(to_name);
errc(EXIT_FAILURE, rv, "vfork");
/*NOTREACHED*/
case 0:
if (*command == '/')
execv(command, args);
else
execvp(command, args);
rv = errno;
const char *arr[] = {
getprogname(),
": exec failed for ",
command,
" (",
strerror(rv),
")\n",
};
for (i = 0; i < __arraycount(arr); i++)
write(STDERR_FILENO, arr[i], strlen(arr[i]));
_exit(1);
/*NOTREACHED*/
default:
break;
}
#endif
rv = wait(&status);
if (cmd != to_name)
free(cmd);
out:
if ((rv < 0 || status) && errunlink)
(void)unlink(to_name);
}
/*
* strip --
* use strip(1) to strip the target file
*/
static void
strip(const char *to_name)
{
const char *stripprog;
if ((stripprog = getenv("STRIP")) == NULL || *stripprog == '\0') {
#ifdef TARGET_STRIP
stripprog = TARGET_STRIP;
#else
stripprog = _PATH_STRIP;
#endif
}
run(stripprog, stripArgs, to_name, 1);
}
/*
* afterinstall --
* run provided command on the target file or directory after it's been
* installed and stripped, but before permissions are set or it's renamed
*/
static void
afterinstall(const char *command, const char *to_name, int errunlink)
{
run(command, NULL, to_name, errunlink);
}
/*
* backup --
* backup file "to_name" to to_name.suffix
* if suffix contains a "%", it's taken as a printf(3) pattern
* used for a numbered backup.
*/
static void
backup(const char *to_name)
{
char bname[FILENAME_MAX];
if (numberedbackup) {
/* Do numbered backup */
int cnt;
char suffix_expanded[FILENAME_MAX];
cnt=0;
do {
(void)snprintf(suffix_expanded, FILENAME_MAX, suffix,
cnt);
(void)snprintf(bname, FILENAME_MAX, "%s%s", to_name,
suffix_expanded);
cnt++;
} while (access(bname, F_OK) == 0);
} else {
/* Do simple backup */
(void)snprintf(bname, FILENAME_MAX, "%s%s", to_name, suffix);
}
(void)rename(to_name, bname);
}
/*
* install_dir --
* build directory hierarchy
*/
static void
install_dir(char *path, u_int flags)
{
char *p;
struct stat sb;
int ch;
for (p = path;; ++p)
if (!*p || (p != path && *p == '/')) {
ch = *p;
*p = '\0';
if (mkdir(path, 0777) < 0) {
/*
* Can't create; path exists or no perms.
* stat() path to determine what's there now.
*/
int sverrno;
sverrno = errno;
if (stat(path, &sb) < 0) {
/* Not there; use mkdir()s error */
errno = sverrno;
err(EXIT_FAILURE, "%s: mkdir", path);
}
if (!S_ISDIR(sb.st_mode)) {
errx(EXIT_FAILURE,
"%s exists but is not a directory",
path);
}
}
if (!(*p = ch))
break;
}
if (afterinstallcmd != NULL)
afterinstall(afterinstallcmd, path, 0);
if (!dounpriv && (
((flags & (HASUID | HASGID)) && chown(path, uid, gid) == -1)
|| chmod(path, mode) == -1 )) {
warn("%s: chown/chmod", path);
}
metadata_log(path, "dir", NULL, NULL, NULL, 0);
}
/*
* metadata_log --
* if metafp is not NULL, output mtree(8) full path name and settings to
* metafp, to allow permissions to be set correctly by other tools,
* or to allow integrity checks to be performed.
*/
static void
metadata_log(const char *path, const char *type, struct timeval *tv,
const char *slink, const char *digestresult, off_t size)
{
static const char extra[] = { ' ', '\t', '\n', '\\', '#', '\0' };
const char *p;
char *buf;
size_t destlen;
struct flock metalog_lock;
if (!metafp)
return;
buf = malloc(4 * strlen(path) + 1); /* buf for strsvis(3) */
if (buf == NULL) {
warn("Can't allocate metadata");
return;
}
/* lock log file */
metalog_lock.l_start = 0;
metalog_lock.l_len = 0;
metalog_lock.l_whence = SEEK_SET;
metalog_lock.l_type = F_WRLCK;
if (fcntl(fileno(metafp), F_SETLKW, &metalog_lock) == -1) {
warn("can't lock %s", metafile);
free(buf);
return;
}
p = path; /* remove destdir */
if (destdir) {
destlen = strlen(destdir);
if (strncmp(p, destdir, destlen) == 0 &&
(p[destlen] == '/' || p[destlen] == '\0'))
p += destlen;
}
while (*p && *p == '/') /* remove leading /s */
p++;
strsvis(buf, p, VIS_CSTYLE, extra); /* encode name */
p = buf;
/* print details */
fprintf(metafp, ".%s%s type=%s", *p ? "/" : "", p, type);
if (owner)
fprintf(metafp, " uname=%s", owner);
if (group)
fprintf(metafp, " gname=%s", group);
fprintf(metafp, " mode=%#o", mode);
if (slink) {
strsvis(buf, slink, VIS_CSTYLE, extra); /* encode link */
fprintf(metafp, " link=%s", buf);
}
if (*type == 'f') /* type=file */
fprintf(metafp, " size=%lld", (long long)size);
if (tv != NULL && dopreserve)
fprintf(metafp, " time=%lld.%0*lld",
(long long)tv[1].tv_sec,
(tv[1].tv_usec == 0 ? 1 : 9),
(long long)tv[1].tv_usec * 1000);
if (digestresult && digest)
fprintf(metafp, " %s=%s", digest, digestresult);
if (fflags)
fprintf(metafp, " flags=%s", fflags);
if (tags)
fprintf(metafp, " tags=%s", tags);
fputc('\n', metafp);
fflush(metafp); /* flush output */
/* unlock log file */
metalog_lock.l_type = F_UNLCK;
if (fcntl(fileno(metafp), F_SETLKW, &metalog_lock) == -1) {
warn("can't unlock %s", metafile);
}
free(buf);
}
/*
* xbasename --
* libc basename(3) that returns a pointer to a static buffer
* instead of overwriting that passed-in string.
*/
static char *
xbasename(char *path)
{
static char tmp[MAXPATHLEN];
(void)strlcpy(tmp, path, sizeof(tmp));
return (basename(tmp));
}
/*
* xdirname --
* libc dirname(3) that returns a pointer to a static buffer
* instead of overwriting that passed-in string.
*/
static char *
xdirname(char *path)
{
static char tmp[MAXPATHLEN];
(void)strlcpy(tmp, path, sizeof(tmp));
return (dirname(tmp));
}
/*
* usage --
* print a usage message and die
*/
static void
usage(void)
{
const char *prog;
prog = getprogname();
(void)fprintf(stderr,
"usage: %s [-Ubcprs] [-M log] [-D dest] [-T tags] [-B suffix]\n"
" [-a aftercmd] [-f flags] [-m mode] [-N dbdir] [-o owner] [-g group] \n"
" [-l linkflags] [-h hash] [-S stripflags] file1 file2\n"
" %s [-Ubcprs] [-M log] [-D dest] [-T tags] [-B suffix]\n"
" [-a aftercmd] [-f flags] [-m mode] [-N dbdir] [-o owner] [-g group]\n"
" [-l linkflags] [-h hash] [-S stripflags] file1 ... fileN directory\n"
" %s -d [-Up] [-M log] [-D dest] [-T tags] [-a aftercmd] [-m mode]\n"
" [-N dbdir] [-o owner] [-g group] directory ...\n",
prog, prog, prog);
exit(1);
}
/*
* The following array is used to make a fast determination of which
* characters are interpreted specially by the shell. If a command
* contains any of these characters, it is executed by the shell, not
* directly by us.
*/
static unsigned char _metachar[128] = {
/* nul soh stx etx eot enq ack bel */
1, 0, 0, 0, 0, 0, 0, 0,
/* bs ht nl vt np cr so si */
0, 0, 1, 0, 0, 0, 0, 0,
/* dle dc1 dc2 dc3 dc4 nak syn etb */
0, 0, 0, 0, 0, 0, 0, 0,
/* can em sub esc fs gs rs us */
0, 0, 0, 0, 0, 0, 0, 0,
/* sp ! " # $ % & ' */
0, 1, 1, 1, 1, 0, 1, 1,
/* ( ) * + , - . / */
1, 1, 1, 0, 0, 0, 0, 0,
/* 0 1 2 3 4 5 6 7 */
0, 0, 0, 0, 0, 0, 0, 0,
/* 8 9 : ; < = > ? */
0, 0, 0, 1, 1, 0, 1, 1,
/* @ A B C D E F G */
0, 0, 0, 0, 0, 0, 0, 0,
/* H I J K L M N O */
0, 0, 0, 0, 0, 0, 0, 0,
/* P Q R S T U V W */
0, 0, 0, 0, 0, 0, 0, 0,
/* X Y Z [ \ ] ^ _ */
0, 0, 0, 1, 1, 1, 1, 0,
/* ` a b c d e f g */
1, 0, 0, 0, 0, 0, 0, 0,
/* h i j k l m n o */
0, 0, 0, 0, 0, 0, 0, 0,
/* p q r s t u v w */
0, 0, 0, 0, 0, 0, 0, 0,
/* x y z { | } ~ del */
0, 0, 0, 1, 1, 1, 1, 0,
};
#define ismeta(c) _metachar[(c) & 0x7f]
static int
needshell(const char *cmd, int white)
{
while (!ismeta(*cmd) && *cmd != ':' && *cmd != '=') {
if (white && isspace((unsigned char)*cmd))
break;
cmd++;
}
return *cmd != '\0';
}
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