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minix/usr.bin/xinstall/xinstall.c
Ben Gras 0b79eac642 mmap: accept non-PROT_WRITE MAP_SHARED mappings 
Currently we don't accept writable file mmap()s, as there is no
system in place to guarantee dirty buffers would make it back to
disk. But we can actually accept MAP_SHARED for PROT_READ mappings,
meaning the ranges aren't writable at all (and no private copy is
made as with MAP_PRIVATE), as it turns out a fairly large class of
usage.

	. fail writable MAP_SHARED mappings at runtime
	. reduces some minix-specific patches
	. lets binutils gold build on minix without further patching

Change-Id: If2896c0a555328ac5b324afa706063fc6d86519e
2014-07-28 17:05:20 +02:00

1279 lines
30 KiB
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/* $NetBSD: xinstall.c,v 1.115 2011/09/06 18:50:32 joerg 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.
*/
#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 1.115 2011/09/06 18:50:32 joerg Exp $");
#endif
#endif /* not lint */
#define __MKTEMP_OK__ /* All uses of mktemp have been checked */
#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>
#include <md5.h>
#include <rmd160.h>
#include <sha1.h>
#include <sha2.h>
#include "pathnames.h"
#include "mtree.h"
#define STRIP_ARGS_MAX 32
#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 strip(char *);
__dead static void usage(void);
static char *xbasename(char *);
static char *xdirname(char *);
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)
errx(1, "%s", strerror(ENOMEM));
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(1, "%c: invalid link type", *p);
/* NOTREACHED */
}
break;
case 'm':
haveopt_m = 1;
if (!(set = setmode(optarg)))
err(1, "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(1,
"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)
errx(1, "%s", strerror(ENOMEM));
/* 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(1, "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(1, "unknown user %s", owner);
uid = id;
}
iflags |= HASUID;
}
#if ! HAVE_NBTOOL_CONFIG_H
if (fflags && !dounpriv) {
if (string_to_flags(&fflags, &fileflags, NULL))
errx(1, "%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(1, "%s: stat", *argv);
if (!S_ISREG(to_sb.st_mode))
errx(1, "%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(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.
*/
#if !defined(__minix)
#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
#endif /* !defined(__minix) */
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(1, "%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(1, "%s: mktemp", tmpl);
if (symlink(from_name, tmpl) == -1)
err(1, "symlink %s -> %s", from_name, tmpl);
if (rename(tmpl, to_name) == -1) {
/* remove temporary link before exiting */
(void)unlink(tmpl);
err(1, "%s: rename", to_name);
}
} else {
if (symlink(from_name, to_name) == -1)
err(1, "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(1, "link %s -> %s", from_name, to_name);
} else {
if (stat(to_name, &to_sb))
err(1, "%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(1, "%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(1, "%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(1, "%s: realpath", cp);
/* .. and add the last component */
if (strcmp(dst, "/") != 0) {
if (strlcat(dst, "/", sizeof(dst)) > sizeof(dst))
errx(1, "resolved pathname too long");
}
cp = xbasename(to_name);
if (strlcat(dst, cp, sizeof(dst)) > sizeof(dst))
errx(1, "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(1, "%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(1, "%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 !defined(__minix)
#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
#endif /* !defined(__minix) */
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(1, "%s: mkstemp", to_name);
} else {
if ((to_fd = open(to_name,
O_CREAT | O_WRONLY | O_TRUNC, S_IRUSR | S_IWUSR)) < 0)
err(1, "%s: open", to_name);
}
digestresult = NULL;
if (!devnull) {
if ((from_fd = open(from_name, O_RDONLY, 0)) < 0) {
(void)unlink(to_name);
err(1, "%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(1, "stripping %s", to_name);
/*
* Recalculate size and digestresult after stripping.
*/
if (fstat(to_fd, &to_sb) != 0)
err(1, "%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(1, "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);
errx(1, "%s: chown/chgrp: %s", to_name, strerror(serrno));
}
tmpmode = mode;
if (dounpriv)
tmpmode &= S_IRWXU|S_IRWXG|S_IRWXO;
if (fchmod(to_fd, tmpmode) == -1) {
serrno = errno;
(void)unlink(to_name);
errx(1, "%s: chmod: %s", to_name, strerror(serrno));
}
/*
* 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(1, "%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 !defined(__minix)
#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
#endif /* !defined(__minix) */
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__) && !defined(__minix)
if (madvise(p, (size_t)size, MADV_SEQUENTIAL) == -1
&& errno != EOPNOTSUPP)
warnx("madvise: %s", strerror(errno));
#endif
if (to_fd >= 0 && write(to_fd, p, size) != size) {
serrno = errno;
(void)unlink(to_name);
errx(1, "%s: write: %s",
to_name, strerror(serrno));
}
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);
errx(1, "%s: write: %s", to_name,
strerror(nw > 0 ? EIO : serrno));
}
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);
errx(1, "%s: read: %s", from_name, strerror(serrno));
}
}
}
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;
}
}
/*
* strip --
* use strip(1) to strip the target file
*/
static void
strip(char *to_name)
{
static const char exec_failure[] = ": exec of strip failed: ";
int serrno, status;
const char * volatile stripprog, *progname;
char *cmd;
if ((stripprog = getenv("STRIP")) == NULL || *stripprog == '\0') {
#ifdef TARGET_STRIP
stripprog = TARGET_STRIP;
#else
stripprog = _PATH_STRIP;
#endif
}
cmd = NULL;
if (stripArgs) {
/*
* Build up a command line and let /bin/sh
* parse the arguments.
*/
int ret = asprintf(&cmd, "%s %s %s", stripprog, stripArgs,
to_name);
if (ret == -1 || cmd == NULL)
err(1, "asprintf failed");
}
switch (vfork()) {
case -1:
serrno = errno;
(void)unlink(to_name);
errx(1, "vfork: %s", strerror(serrno));
/*NOTREACHED*/
case 0:
if (stripArgs)
execl(_PATH_BSHELL, "sh", "-c", cmd, NULL);
else
execlp(stripprog, "strip", to_name, NULL);
progname = getprogname();
write(STDERR_FILENO, progname, strlen(progname));
write(STDERR_FILENO, exec_failure, strlen(exec_failure));
write(STDERR_FILENO, stripprog, strlen(stripprog));
write(STDERR_FILENO, "\n", 1);
_exit(1);
/*NOTREACHED*/
default:
if (wait(&status) == -1 || status)
(void)unlink(to_name);
}
free(cmd);
}
/*
* 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)
{
int serrno, status;
char *cmd;
switch (vfork()) {
case -1:
serrno = errno;
if (errunlink)
(void)unlink(to_name);
errx(1, "vfork: %s", strerror(serrno));
/*NOTREACHED*/
case 0:
/*
* build up a command line and let /bin/sh
* parse the arguments
*/
cmd = (char*)malloc(sizeof(char)*
(2+strlen(command)+
strlen(to_name)));
if (cmd == NULL)
errx(1, "%s", strerror(ENOMEM));
sprintf(cmd, "%s %s", command, to_name);
execl(_PATH_BSHELL, "sh", "-c", cmd, NULL);
warn("%s: exec of after install command", command);
_exit(1);
/*NOTREACHED*/
default:
if ((wait(&status) == -1 || status) && errunlink)
(void)unlink(to_name);
}
}
/*
* 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(1, "%s: mkdir", path);
}
if (!S_ISDIR(sb.st_mode)) {
errx(1,
"%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 = (char *)malloc(4 * strlen(path) + 1); /* buf for strsvis(3) */
if (buf == NULL) {
warnx("%s", strerror(ENOMEM));
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.%ld",
(long long)tv[1].tv_sec, (long)tv[1].tv_usec);
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);
}
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