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file_subs.c
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file_subs.c
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/* $OpenBSD: file_subs.c,v 1.53 2017/01/21 08:17:06 krw Exp $ */
/* $NetBSD: file_subs.c,v 1.4 1995/03/21 09:07:18 cgd Exp $ */
/*-
* Copyright (c) 2007, 2008, 2009, 2012, 2014, 2016, 2018, 2019, 2024
* mirabilos <[email protected]>
* Copyright (c) 2018
* Jonathan de Boyne Pollard <[email protected]>
* mirabilos <[email protected]>
* Copyright (c) 2011
* Svante Signell <[email protected]>
* Copyright (c) 1992 Keith Muller.
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Keith Muller of the University of California, San Diego.
*
* 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.
*/
#include <sys/stat.h>
#if HAVE_BOTH_TIME_H
#include <sys/time.h>
#include <time.h>
#elif HAVE_SYS_TIME_H
#include <sys/time.h>
#elif HAVE_TIME_H
#include <time.h>
#endif
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if HAVE_STRINGS_H
#include <strings.h>
#endif
#include <unistd.h>
#if HAVE_UTIME_H
#include <utime.h>
#endif
#include "pax.h"
#define EXTERN
#include "ftimes.h"
#undef EXTERN
#include "extern.h"
__RCSID("$MirOS: src/bin/pax/file_subs.c,v 1.33 2024/08/17 23:33:51 tg Exp $");
/*
* routines that deal with file operations such as: creating, removing;
* and setting access modes, uid/gid and times of files
*/
#if HAVE_FUTIMENS || HAVE_FUTIMES
#define PAX_FSET_FTIME
#endif
static int mk_link(char *, struct stat *, char *, int);
#ifdef PAX_FSET_FTIME
static void fset_ftime(const char *, int, const struct stat *, int);
#endif
/*
* file_creat()
* Create and open a file.
* Return:
* file descriptor or -1 for failure
*/
int
file_creat(ARCHD *arcn)
{
int fd = -1;
mode_t file_mode;
int oerrno;
/*
* Assume file doesn't exist, so just try to create it, most times this
* works. We have to take special handling when the file does exist. To
* detect this, we use O_EXCL. For example when trying to create a
* file and a character device or FIFO exists with the same name, we
* can accidently open the device by mistake (or block waiting to open).
* If we find that the open has failed, then spend the effort to
* figure out why. This strategy was found to have better average
* performance in common use than checking the file (and the path)
* first with lstat.
*/
file_mode = arcn->sb.st_mode & FILEBITS;
if ((fd = binopen3(0, arcn->name, O_WRONLY | O_CREAT | O_EXCL,
file_mode)) >= 0)
return (fd);
/*
* the file seems to exist. First we try to get rid of it (found to be
* the second most common failure when traced). If this fails, only
* then we go to the expense to check and create the path to the file
*/
if (unlnk_exist(arcn->name, arcn->type) != 0)
return(-1);
for (;;) {
/*
* try to open it again, if this fails, check all the nodes in
* the path and give it a final try. if chk_path() finds that
* it cannot fix anything, we will skip the last attempt
*/
if ((fd = binopen3(0, arcn->name, O_WRONLY | O_CREAT | O_TRUNC,
file_mode)) >= 0)
break;
oerrno = errno;
if (nodirs || chk_path(arcn->name,arcn->sb.st_uid,arcn->sb.st_gid) < 0) {
syswarn(1, oerrno, "Unable to create %s", arcn->name);
return(-1);
}
}
return(fd);
}
/*
* file_close()
* Close file descriptor to a file just created by pax. Sets modes,
* ownership and times as required.
* Return:
* 0 for success, -1 for failure
*/
void
file_close(ARCHD *arcn, int fd)
{
int res = 0;
if (fd < 0)
return;
/*
* set owner/groups first as this may strip off mode bits we want
* then set file permission modes. Then set file access and
* modification times.
*/
if (pids)
res = fset_ids(arcn->name, fd, arcn->sb.st_uid,
arcn->sb.st_gid);
/*
* IMPORTANT SECURITY NOTE:
* if not preserving mode or we cannot set uid/gid, then PROHIBIT
* set uid/gid bits
*/
if (!pmode || res)
arcn->sb.st_mode &= ~(SETBITS);
if (pmode)
fset_pmode(arcn->name, fd, arcn->sb.st_mode);
#ifdef PAX_FSET_FTIME
if (patime || pmtime)
fset_ftime(arcn->name, fd, &arcn->sb, 0);
#endif
if (close(fd) < 0)
syswarn(0, errno, "Unable to close file descriptor on %s",
arcn->name);
}
/*
* lnk_creat()
* Create a hard link to arcn->ln_name from arcn->name. arcn->ln_name
* must exist;
* Return:
* fd+2 if data should be extracted,
* 0 if ok, 1 if we could not make the link, -1 otherwise
*/
int
lnk_creat(ARCHD *arcn, int *fdp)
{
struct stat sb;
int res;
/*
* we may be running as root, so we have to be sure that link target
* is not a directory, so we lstat and check
*/
if (lstat(arcn->ln_name, &sb) < 0) {
syswarn(1, errno, "Unable to link to %s from %s",
arcn->ln_name, arcn->name);
return (-1);
}
if (S_ISDIR(sb.st_mode)) {
paxwarn(1, "A hard link to the directory %s is not allowed",
arcn->ln_name);
return(-1);
}
res = mk_link(arcn->ln_name, &sb, arcn->name, 0);
if (res == 0) {
/* check for a hardlink to a placeholder symlink */
res = sltab_add_link(arcn->name, &sb);
if (res < 0) {
/* arrgh, it failed, clean up */
unlink(arcn->name);
}
}
if (fdp != NULL && res == 0 && sb.st_size == 0 && arcn->skip > 0) {
/* request to write out file data late (broken archive) */
if (pmode)
set_pmode(arcn->name, 0600, /*XXX I think */ 0);
if ((*fdp = binopen2(0, arcn->name, O_WRONLY | O_TRUNC)) == -1) {
res = errno;
syswarn(1, res, "Unable to re-open %s", arcn->name);
if (pmode)
set_pmode(arcn->name, sb.st_mode, 0);
}
res = 0;
} else if (fdp != NULL)
*fdp = -1;
return (res);
}
/*
* cross_lnk()
* Create a hard link to arcn->org_name from arcn->name. Only used in copy
* with the -l flag. No warning or error if this does not succeed (we will
* then just create the file)
* Return:
* 1 if copy() should try to create this file node
* 0 if cross_lnk() ok, -1 for fatal flaw (like linking to self).
*/
int
cross_lnk(ARCHD *arcn)
{
/*
* try to make a link to original file (-l flag in copy mode). make
* sure we do not try to link to directories in case we are running as
* root (and it might succeed).
*/
if (arcn->type == PAX_DIR)
return(1);
return(mk_link(arcn->org_name, &(arcn->sb), arcn->name, 1));
}
/*
* chk_same()
* In copy mode if we are not trying to make hard links between the src
* and destinations, make sure we are not going to overwrite ourselves by
* accident. This slows things down a little, but we have to protect all
* those people who make typing errors.
* Return:
* 1 the target does not exist, go ahead and copy
* 0 skip it file exists (-k) or may be the same as source file
*/
int
chk_same(ARCHD *arcn)
{
struct stat sb;
/*
* if file does not exist, return. if file exists and -k, skip it
* quietly
*/
if (lstat(arcn->name, &sb) < 0)
return(1);
if (kflag)
return(0);
/*
* better make sure the user does not have src == dest by mistake
*/
if ((arcn->sb.st_dev == sb.st_dev) && (arcn->sb.st_ino == sb.st_ino)) {
paxwarn(1, "Unable to copy %s, file would overwrite itself",
arcn->name);
return(0);
}
return(1);
}
/*
* helper function to copy a symbolic link
*/
static int
mk_link_symlink(const char *to, const char *from)
{
int cnt;
char buf[PAXPATHLEN + 1];
if ((cnt = readlink(to, buf, PAXPATHLEN)) < 0)
return (-1);
/* cf. comment in ftree.c:next_file() */
buf[cnt] = '\0';
return (symlink(buf, from));
}
/*
* mk_link()
* try to make a hard link between two files. if ign set, we do not
* complain.
* Return:
* 0 if successful (or we are done with this file but no error, such as
* finding the from file exists and the user has set -k).
* 1 when ign was set to indicates we could not make the link but we
* should try to copy/extract the file as that might work (and is an
* allowed option). -1 an error occurred.
*/
static int
mk_link(char *to, struct stat *to_sb, char *from, int ign)
{
struct stat sb;
int oerrno;
/*
* if from file exists, it has to be unlinked to make the link. If the
* file exists and -k is set, skip it quietly
*/
if (lstat(from, &sb) == 0) {
if (kflag)
return(0);
/*
* make sure it is not the same file, protect the user
*/
if ((to_sb->st_dev==sb.st_dev)&&(to_sb->st_ino == sb.st_ino)) {
paxwarn(1, "Unable to link file %s to itself", to);
return(-1);
}
/*
* try to get rid of the file, based on the type
*/
if (S_ISDIR(sb.st_mode)) {
if (rmdir(from) < 0) {
syswarn(1, errno, "Unable to remove %s", from);
return(-1);
}
delete_dir(sb.st_dev, sb.st_ino);
} else if (unlink(from) < 0) {
if (!ign) {
syswarn(1, errno, "Unable to remove %s", from);
return(-1);
}
return(1);
}
}
/*
* from file is gone (or did not exist), try to make the hard link.
* if it fails, check the path and try it again (if chk_path() says to
* try again)
*/
for (;;) {
#if HAVE_LINKAT
if (linkat(AT_FDCWD, to, AT_FDCWD, from, 0) == 0)
#else
if (link(to, from) == 0)
#endif
break;
oerrno = errno;
if (S_ISLNK(to_sb->st_mode)) {
/* just copy the symlink */
if (mk_link_symlink(to, from) == 0)
break;
}
if (!nodirs && chk_path(from, to_sb->st_uid, to_sb->st_gid) == 0)
continue;
/*-
* non-standard (via -M lncp) cross-device link handling:
* copy if hard link fails (but what if there are several
* links for the same file mixed between several devices?
* this code copies for all non-original devices, instead
* of tracking them and linking between them on their re-
* spective target device)
*/
if (oerrno == EXDEV && (anonarch & ANON_LNCP)) {
int fdsrc, fddest;
ARCHD tarcn;
if ((fdsrc = binopen3(0, to, O_RDONLY, 0)) < 0) {
if (!ign)
syswarn(1, errno,
"Unable to open %s to read", to);
goto lncp_failed;
}
strlcpy(tarcn.name, from, sizeof(tarcn.name));
memcpy(&tarcn.sb, to_sb, sizeof(struct stat));
tarcn.type = PAX_REG; /* XXX */
tarcn.org_name = to;
if ((fddest = file_creat(&tarcn)) < 0) {
rdfile_close(&tarcn, &fdsrc);
goto lncp_failed;
}
cp_file(&tarcn, fdsrc, fddest);
file_close(&tarcn, fddest);
rdfile_close(&tarcn, &fdsrc);
/* file copied successfully, continue on */
break;
}
if (!ign) {
lncp_failed:
syswarn(1, oerrno, "Unable to link to %s from %s",
to, from);
return (-1);
}
return (1);
}
/*
* all right the link was made
*/
return (0);
}
/*
* node_creat()
* create an entry in the filesystem (other than a file or hard link).
* If successful, sets uid/gid modes and times as required.
* Return:
* 0 if ok, -1 otherwise
*/
int
node_creat(ARCHD *arcn)
{
int res;
int ign = 0;
int oerrno;
int pass = 0;
mode_t file_mode;
struct stat sb;
char *allocd = NULL;
char *nm = arcn->name;
int len, defer_pmode = 0;
/*
* create node based on type, if that fails try to unlink the node and
* try again. finally check the path and try again. As noted in the
* file and link creation routines, this method seems to exhibit the
* best performance in general use workloads.
*/
file_mode = arcn->sb.st_mode & FILEBITS;
for (;;) {
switch (arcn->type) {
case PAX_DIR:
/*
* If -h (or -L) was given in tar-mode, follow the
* potential symlink chain before trying to create the
* directory.
*/
if (op_mode == OP_TAR && Lflag) {
while (lstat(nm, &sb) == 0 &&
S_ISLNK(sb.st_mode)) {
char *target = malloc(sb.st_size + 1);
if (target == NULL) {
free(allocd);
oerrno = ENOMEM;
syswarn(1, oerrno,
"Out of memory");
return (-1);
}
len = readlink(nm, target,
sb.st_size + 1);
if (len == -1) {
syswarn(0, errno,
"cannot follow symlink %s in chain for %s",
nm, arcn->name);
res = -1;
goto badlink;
}
target[len] = '\0';
nm = target;
free(allocd);
allocd = target;
}
}
res = mkdir(nm, file_mode);
badlink:
if (ign)
res = 0;
break;
case PAX_CHR:
file_mode |= S_IFCHR;
res = mknod(nm, file_mode, arcn->sb.st_rdev);
break;
case PAX_BLK:
file_mode |= S_IFBLK;
res = mknod(nm, file_mode, arcn->sb.st_rdev);
break;
case PAX_FIF:
res = mkfifo(nm, file_mode);
break;
case PAX_SCK:
/*
* Skip sockets, operation has no meaning under BSD
*/
paxwarn(0,
"%s skipped. Sockets cannot be copied or extracted",
nm);
free(allocd);
return (-1);
case PAX_SLK:
if (arcn->ln_name[0] != '/' &&
!has_dotdot(arcn->ln_name))
res = symlink(arcn->ln_name, nm);
else {
/*
* absolute symlinks and symlinks with ".."
* have to be deferred to prevent the archive
* from bootstrapping itself to outside the
* working directory.
*/
res = sltab_add_sym(nm, arcn->ln_name,
arcn->sb.st_mode);
if (res == 0)
defer_pmode = 1;
}
break;
case PAX_CTG:
case PAX_HLK:
case PAX_HRG:
case PAX_REG:
default:
/*
* we should never get here
*/
paxwarn(0, "%s has an unknown file type, skipping",
nm);
free(allocd);
return (-1);
}
/*
* if we were able to create the node break out of the loop,
* otherwise try to unlink the node and try again. if that
* fails check the full path and try a final time.
*/
if (res == 0)
break;
/*
* we failed to make the node
*/
oerrno = errno;
if ((ign = unlnk_exist(nm, arcn->type)) < 0) {
free(allocd);
return (-1);
}
if (++pass <= 1)
continue;
if (nodirs || chk_path(nm,arcn->sb.st_uid,arcn->sb.st_gid) < 0) {
syswarn(1, oerrno, "Unable to create %s", nm);
free(allocd);
return (-1);
}
}
/*
* we were able to create the node. set uid/gid, modes and times
*/
if (pids)
res = set_ids(nm, arcn->sb.st_uid, arcn->sb.st_gid,
arcn->type == PAX_SLK);
else
res = 0;
/*
* IMPORTANT SECURITY NOTE:
* if not preserving mode or we cannot set uid/gid, then PROHIBIT any
* set uid/gid bits
*/
if (!pmode || res)
arcn->sb.st_mode &= ~(SETBITS);
if (pmode && !defer_pmode)
set_pmode(nm, arcn->sb.st_mode, arcn->type == PAX_SLK);
if (arcn->type == PAX_DIR && op_mode != OP_CPIO) {
/*
* Dirs must be processed again at end of extract to set times
* and modes to agree with those stored in the archive. However
* to allow extract to continue, we may have to also set owner
* rights. This allows nodes in the archive that are children
* of this directory to be extracted without failure. Both time
* and modes will be fixed after the entire archive is read and
* before pax exits. To do that safely, we want the dev+ino
* of the directory we created.
*/
if (lstat(nm, &sb) < 0) {
syswarn(0, errno, "Unable to stat %s", nm);
} else if (access(nm, R_OK | W_OK | X_OK) < 0) {
/*
* We have to add rights to the dir, so we make
* sure to restore the mode. The mode must be
* restored AS CREATED and not as stored if
* pmode is not set.
*/
set_pmode(nm,
((sb.st_mode & FILEBITS) | S_IRWXU), 0);
if (!pmode)
arcn->sb.st_mode = sb.st_mode;
/*
* we have to force the mode to what was set
* here, since we changed it from the default
* as created.
*/
arcn->sb.st_dev = sb.st_dev;
arcn->sb.st_ino = sb.st_ino;
add_dir(nm, &(arcn->sb), 1);
} else if (pmode || patime || pmtime) {
arcn->sb.st_dev = sb.st_dev;
arcn->sb.st_ino = sb.st_ino;
add_dir(nm, &(arcn->sb), 0);
}
} else if (patime || pmtime)
set_ftime(nm, &arcn->sb, 0, arcn->type == PAX_SLK);
free(allocd);
return (0);
}
/*
* unlnk_exist()
* Remove node from filesystem with the specified name. We pass the type
* of the node that is going to replace it. When we try to create a
* directory and find that it already exists, we allow processing to
* continue as proper modes etc will always be set for it later on.
* Return:
* 0 is ok to proceed, no file with the specified name exists
* -1 we were unable to remove the node, or we should not remove it (-k)
* 1 we found a directory and we were going to create a directory.
*/
int
unlnk_exist(char *name, int type)
{
struct stat sb;
/*
* the file does not exist, or -k we are done
*/
if (lstat(name, &sb) < 0)
return(0);
if (kflag)
return(-1);
if (S_ISDIR(sb.st_mode)) {
/*
* try to remove a directory, if it fails and we were going to
* create a directory anyway, tell the caller (return a 1)
*/
if (rmdir(name) < 0) {
if (type == PAX_DIR)
return(1);
syswarn(1,errno,"Unable to remove directory %s", name);
return(-1);
}
delete_dir(sb.st_dev, sb.st_ino);
return(0);
}
/*
* try to get rid of all non-directory type nodes
*/
if (unlink(name) < 0) {
syswarn(1, errno, "Unable to remove %s", name);
return(-1);
}
return(0);
}
/*
* chk_path()
* We were trying to create some kind of node in the filesystem and it
* failed. chk_path() makes sure the path up to the node exists and is
* writeable. When we have to create a directory that is missing along the
* path somewhere, the directory we create will be set to the same
* uid/gid as the file has (when uid and gid are being preserved).
* NOTE: this routine is a real performance loss. It is only used as a
* last resort when trying to create entries in the filesystem.
* Return:
* -1 when it could find nothing it is allowed to fix.
* 0 otherwise
*/
int
chk_path(char *name, uid_t st_uid, gid_t st_gid)
{
char *spt = name;
char *next;
struct stat sb;
int retval = -1;
/*
* watch out for paths with nodes stored directly in / (e.g. /bozo)
*/
while (*spt == '/')
++spt;
for (;;) {
/*
* work forward from the first / and check each part of the path
*/
spt = strchr(spt, '/');
if (spt == NULL)
break;
/*
* skip over duplicate slashes; stop if there're only
* trailing slashes left
*/
next = spt + 1;
while (*next == '/')
next++;
if (*next == '\0')
break;
*spt = '\0';
/*
* if it exists we assume it is a directory, it is not within
* the spec (at least it seems to read that way) to alter the
* filesystem for nodes NOT EXPLICITLY stored on the archive.
* If that assumption is changed, you would test the node here
* and figure out how to get rid of it (probably like some
* recursive unlink()) or fix up the directory permissions if
* required (do an access()).
*/
if (lstat(name, &sb) == 0) {
*spt = '/';
spt = next;
continue;
}
/*
* the path fails at this point, see if we can create the
* needed directory and continue on
*/
if (mkdir(name, S_IRWXU | S_IRWXG | S_IRWXO) < 0) {
*spt = '/';
retval = -1;
break;
}
/*
* we were able to create the directory. We will tell the
* caller that we found something to fix, and it is ok to try
* and create the node again.
*/
retval = 0;
if (pids)
(void)set_ids(name, st_uid, st_gid, 0);
/*
* make sure the user doesn't have some strange umask that
* causes this newly created directory to be unusable. We fix
* the modes and restore them back to the creation default at
* the end of pax
*/
if ((access(name, R_OK | W_OK | X_OK) < 0) &&
(lstat(name, &sb) == 0)) {
set_pmode(name, ((sb.st_mode & FILEBITS) | S_IRWXU), 0);
add_dir(name, &sb, 1);
}
*spt = '/';
spt = next;
continue;
}
return(retval);
}
/*
* set_ftime()
* Set the access time and modification time for a named file. If frc
* is non-zero we force these times to be set even if the user did not
* request access and/or modification time preservation (this is also
* used by -t to reset access times).
* When ign is zero, only those times the user has asked for are set, the
* other ones are left alone. We do not assume the un-documented feature
* of many utimes() implementations that consider a 0 time value as a do
* not set request.
*/
void
set_ftime(const char *fnm, const struct stat *sbp, int frc,
int issymlink MKSH_A_UNUSED)
{
#if HAVE_UTIMENSAT
struct timespec ts[2];
#else
struct {
time_t tv_sec;
long tv_nsec;
} ts[2];
#if HAVE_UTIMES
struct timeval tv[2];
#else
struct utimbuf u;
#endif
struct stat sb;
#endif
int rv;
/* pre-initialise values to set */
st_timexp(a, &ts[0], sbp);
st_timexp(m, &ts[1], sbp);
if (!frc && (!patime || !pmtime)) {
/*
* If we are not forcing, only set those times the user
* wants set. We get the current values of the times if
* we need them (utimensat does not).
*/
#if HAVE_UTIMENSAT
if (!patime)
ts[0].tv_nsec = UTIME_OMIT;
if (!pmtime)
ts[1].tv_nsec = UTIME_OMIT;
#else
if (lstat(fnm, &sb) == 0) {
if (!patime)
st_timexp(a, &ts[0], &sb);
if (!pmtime)
st_timexp(m, &ts[1], &sb);
} else
syswarn(0, errno, "Unable to stat %s", fnm);
#endif
}
/* set the times */
#if HAVE_UTIMENSAT
rv = utimensat(AT_FDCWD, fnm, ts, AT_SYMLINK_NOFOLLOW);
#elif HAVE_UTIMES
tv[0].tv_sec = ts[0].tv_sec;
tv[0].tv_usec = ts[0].tv_nsec / 1000;
tv[1].tv_sec = ts[1].tv_sec;
tv[1].tv_usec = ts[1].tv_nsec / 1000;
#if HAVE_LUTIMES
rv = (issymlink ? lutimes : utimes)(fnm, tv);
#else
if (issymlink)
/* no can do */
return;
rv = utimes(fnm, tv);
#endif
if (rv < 0 && issymlink && (errno == ENOSYS || errno == ENOTSUP))
/* might be glibc */
return;
#else
if (issymlink)
/* no can do */
return;
u.actime = ts[0].tv_sec;
u.modtime = ts[1].tv_sec;
rv = utime(fnm, &u);
#endif
if (rv < 0)
syswarn(1, errno, "Access/modification time set failed on: %s",
fnm);
}
#ifdef PAX_FSET_FTIME
static void
fset_ftime(const char *fnm, int fd, const struct stat *sbp, int frc)
{
#if HAVE_FUTIMENS
struct timespec ts[2];
#else
struct {
time_t tv_sec;
long tv_nsec;
} ts[2];
struct timeval tv[2];
struct stat sb;
#endif
int rv;
/* pre-initialise values to set */
st_timexp(a, &ts[0], sbp);
st_timexp(m, &ts[1], sbp);
if (!frc && (!patime || !pmtime)) {
/*
* If we are not forcing, only set those times the user
* wants set. We get the current values of the times if
* we need them (futimens does not).
*/
#if HAVE_FUTIMENS
if (!patime)
ts[0].tv_nsec = UTIME_OMIT;
if (!pmtime)
ts[1].tv_nsec = UTIME_OMIT;
#else
if (fstat(fd, &sb) == 0) {
if (!patime)
st_timexp(a, &ts[0], &sb);
if (!pmtime)
st_timexp(m, &ts[1], &sb);
} else
syswarn(0, errno, "Unable to stat %s", fnm);
#endif
}
/* set the times */
#if HAVE_FUTIMENS
rv = futimens(fd, ts);
#else
tv[0].tv_sec = ts[0].tv_sec;
tv[0].tv_usec = ts[0].tv_nsec / 1000;
tv[1].tv_sec = ts[1].tv_sec;
tv[1].tv_usec = ts[1].tv_nsec / 1000;
rv = futimes(fd, tv);
#endif
if (rv < 0)
syswarn(1, errno, "Access/modification time set failed on: %s",
fnm);
}
#endif
/*
* set_ids()
* set the uid and gid of a filesystem node
* Return:
* 0 when set, -1 on failure
*/
int
set_ids(char *fnm, uid_t uid, gid_t gid, int issymlink MKSH_A_UNUSED)
{
int rv;
#if HAVE_FCHOWNAT
rv = fchownat(AT_FDCWD, fnm, uid, gid, AT_SYMLINK_NOFOLLOW);
#elif HAVE_LCHOWN
rv = (issymlink ? lchown : chown)(fnm, uid, gid);
if (rv < 0 && issymlink && (errno == ENOSYS || errno == ENOTSUP))
/* might be glibc */
return (0);
#else
if (issymlink)
/* no can do */
return (0);
rv = chown(fnm, uid, gid);
#endif
if (rv < 0) {
/*
* ignore EPERM unless in verbose mode or being run by root.
* if running as pax, POSIX requires a warning.
*/
if (/* portability, imake style though */
#ifndef __INTERIX
errno != EPERM || vflag || geteuid() == 0 ||
#endif
op_mode == OP_PAX)
syswarn(1, errno, "Unable to set file uid/gid of %s",
fnm);
return (-1);
}
return (0);
}
int
fset_ids(char *fnm, int fd, uid_t uid, gid_t gid)
{
if (fchown(fd, uid, gid) < 0) {
/*
* ignore EPERM unless in verbose mode or being run by root.
* if running as pax, POSIX requires a warning.