329 lines
8.6 KiB
C
329 lines
8.6 KiB
C
/*-
|
|
* Copyright (c) 1991, 1993, 1994
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef lint
|
|
#if 0
|
|
static char sccsid[] = "@(#)utils.c 8.3 (Berkeley) 4/1/94";
|
|
#endif
|
|
static const char rcsid[] =
|
|
"$FreeBSD$";
|
|
#endif /* not lint */
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/stat.h>
|
|
#ifdef VM_AND_BUFFER_CACHE_SYNCHRONIZED
|
|
#include <sys/mman.h>
|
|
#endif
|
|
|
|
#include <err.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <fts.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
|
|
#include "extern.h"
|
|
|
|
int
|
|
copy_file(entp, dne)
|
|
FTSENT *entp;
|
|
int dne;
|
|
{
|
|
static char buf[MAXBSIZE];
|
|
struct stat to_stat, *fs;
|
|
int ch, checkch, from_fd, rcount, rval, to_fd, wcount, wresid;
|
|
char *bufp;
|
|
#ifdef VM_AND_BUFFER_CACHE_SYNCHRONIZED
|
|
char *p;
|
|
#endif
|
|
|
|
if ((from_fd = open(entp->fts_path, O_RDONLY, 0)) == -1) {
|
|
warn("%s", entp->fts_path);
|
|
return (1);
|
|
}
|
|
|
|
fs = entp->fts_statp;
|
|
|
|
/*
|
|
* If the file exists and we're interactive, verify with the user.
|
|
* If the file DNE, set the mode to be the from file, minus setuid
|
|
* bits, modified by the umask; arguably wrong, but it makes copying
|
|
* executables work right and it's been that way forever. (The
|
|
* other choice is 666 or'ed with the execute bits on the from file
|
|
* modified by the umask.)
|
|
*/
|
|
if (!dne) {
|
|
#define YESNO "(y/n [n]) "
|
|
if (iflag) {
|
|
(void)fprintf(stderr, "overwrite %s? %s",
|
|
to.p_path, YESNO);
|
|
checkch = ch = getchar();
|
|
while (ch != '\n' && ch != EOF)
|
|
ch = getchar();
|
|
if (checkch != 'y' && checkch != 'Y') {
|
|
(void)close(from_fd);
|
|
(void)fprintf(stderr, "not overwritten\n");
|
|
return (0);
|
|
}
|
|
}
|
|
|
|
if (fflag) {
|
|
/* remove existing destination file name,
|
|
* create a new file */
|
|
(void)unlink(to.p_path);
|
|
to_fd = open(to.p_path, O_WRONLY | O_TRUNC | O_CREAT,
|
|
fs->st_mode & ~(S_ISUID | S_ISGID));
|
|
} else
|
|
/* overwrite existing destination file name */
|
|
to_fd = open(to.p_path, O_WRONLY | O_TRUNC, 0);
|
|
} else
|
|
to_fd = open(to.p_path, O_WRONLY | O_TRUNC | O_CREAT,
|
|
fs->st_mode & ~(S_ISUID | S_ISGID));
|
|
|
|
if (to_fd == -1) {
|
|
warn("%s", to.p_path);
|
|
(void)close(from_fd);
|
|
return (1);;
|
|
}
|
|
|
|
rval = 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.
|
|
*/
|
|
#ifdef VM_AND_BUFFER_CACHE_SYNCHRONIZED
|
|
if (S_ISREG(fs->st_mode) && fs->st_size <= 8 * 1048576) {
|
|
if ((p = mmap(NULL, (size_t)fs->st_size, PROT_READ,
|
|
MAP_SHARED, from_fd, (off_t)0)) == MAP_FAILED) {
|
|
warn("%s", entp->fts_path);
|
|
rval = 1;
|
|
} else {
|
|
for (bufp = p, wresid = fs->st_size; ;
|
|
bufp += wcount, wresid -= wcount) {
|
|
wcount = write(to_fd, bufp, wresid);
|
|
if (wcount >= wresid || wcount <= 0)
|
|
break;
|
|
}
|
|
if (wcount != wresid) {
|
|
warn("%s", to.p_path);
|
|
rval = 1;
|
|
}
|
|
/* Some systems don't unmap on close(2). */
|
|
if (munmap(p, fs->st_size) < 0) {
|
|
warn("%s", entp->fts_path);
|
|
rval = 1;
|
|
}
|
|
}
|
|
} else
|
|
#endif
|
|
{
|
|
while ((rcount = read(from_fd, buf, MAXBSIZE)) > 0) {
|
|
for (bufp = buf, wresid = rcount; ;
|
|
bufp += wcount, wresid -= wcount) {
|
|
wcount = write(to_fd, bufp, wresid);
|
|
if (wcount >= wresid || wcount <= 0)
|
|
break;
|
|
}
|
|
if (wcount != wresid) {
|
|
warn("%s", to.p_path);
|
|
rval = 1;
|
|
break;
|
|
}
|
|
}
|
|
if (rcount < 0) {
|
|
warn("%s", entp->fts_path);
|
|
rval = 1;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Don't remove the target even after an error. The target might
|
|
* not be a regular file, or its attributes might be important,
|
|
* or its contents might be irreplaceable. It would only be safe
|
|
* to remove it if we created it and its length is 0.
|
|
*/
|
|
|
|
if (pflag && setfile(fs, to_fd))
|
|
rval = 1;
|
|
/*
|
|
* If the source was setuid or setgid, lose the bits unless the
|
|
* copy is owned by the same user and group.
|
|
*/
|
|
#define RETAINBITS \
|
|
(S_ISUID | S_ISGID | S_ISVTX | S_IRWXU | S_IRWXG | S_IRWXO)
|
|
else if (fs->st_mode & (S_ISUID | S_ISGID) && fs->st_uid == myuid) {
|
|
if (fstat(to_fd, &to_stat)) {
|
|
warn("%s", to.p_path);
|
|
rval = 1;
|
|
} else if (fs->st_gid == to_stat.st_gid &&
|
|
fchmod(to_fd, fs->st_mode & RETAINBITS & ~myumask)) {
|
|
warn("%s", to.p_path);
|
|
rval = 1;
|
|
}
|
|
}
|
|
(void)close(from_fd);
|
|
if (close(to_fd)) {
|
|
warn("%s", to.p_path);
|
|
rval = 1;
|
|
}
|
|
return (rval);
|
|
}
|
|
|
|
int
|
|
copy_link(p, exists)
|
|
FTSENT *p;
|
|
int exists;
|
|
{
|
|
int len;
|
|
char link[MAXPATHLEN];
|
|
|
|
if ((len = readlink(p->fts_path, link, sizeof(link) - 1)) == -1) {
|
|
warn("readlink: %s", p->fts_path);
|
|
return (1);
|
|
}
|
|
link[len] = '\0';
|
|
if (exists && unlink(to.p_path)) {
|
|
warn("unlink: %s", to.p_path);
|
|
return (1);
|
|
}
|
|
if (symlink(link, to.p_path)) {
|
|
warn("symlink: %s", link);
|
|
return (1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
copy_fifo(from_stat, exists)
|
|
struct stat *from_stat;
|
|
int exists;
|
|
{
|
|
if (exists && unlink(to.p_path)) {
|
|
warn("unlink: %s", to.p_path);
|
|
return (1);
|
|
}
|
|
if (mkfifo(to.p_path, from_stat->st_mode)) {
|
|
warn("mkfifo: %s", to.p_path);
|
|
return (1);
|
|
}
|
|
return (pflag ? setfile(from_stat, 0) : 0);
|
|
}
|
|
|
|
int
|
|
copy_special(from_stat, exists)
|
|
struct stat *from_stat;
|
|
int exists;
|
|
{
|
|
if (exists && unlink(to.p_path)) {
|
|
warn("unlink: %s", to.p_path);
|
|
return (1);
|
|
}
|
|
if (mknod(to.p_path, from_stat->st_mode, from_stat->st_rdev)) {
|
|
warn("mknod: %s", to.p_path);
|
|
return (1);
|
|
}
|
|
return (pflag ? setfile(from_stat, 0) : 0);
|
|
}
|
|
|
|
|
|
int
|
|
setfile(fs, fd)
|
|
register struct stat *fs;
|
|
int fd;
|
|
{
|
|
static struct timeval tv[2];
|
|
struct stat ts;
|
|
int rval;
|
|
int gotstat;
|
|
|
|
rval = 0;
|
|
fs->st_mode &= S_ISUID | S_ISGID | S_ISVTX |
|
|
S_IRWXU | S_IRWXG | S_IRWXO;
|
|
|
|
TIMESPEC_TO_TIMEVAL(&tv[0], &fs->st_atimespec);
|
|
TIMESPEC_TO_TIMEVAL(&tv[1], &fs->st_mtimespec);
|
|
if (utimes(to.p_path, tv)) {
|
|
warn("utimes: %s", to.p_path);
|
|
rval = 1;
|
|
}
|
|
if (fd ? fstat(fd, &ts) : stat(to.p_path, &ts))
|
|
gotstat = 0;
|
|
else {
|
|
gotstat = 1;
|
|
ts.st_mode &= S_ISUID | S_ISGID | S_ISVTX |
|
|
S_IRWXU | S_IRWXG | S_IRWXO;
|
|
}
|
|
/*
|
|
* Changing the ownership probably won't succeed, unless we're root
|
|
* or POSIX_CHOWN_RESTRICTED is not set. Set uid/gid before setting
|
|
* the mode; current BSD behavior is to remove all setuid bits on
|
|
* chown. If chown fails, lose setuid/setgid bits.
|
|
*/
|
|
if (!gotstat || fs->st_uid != ts.st_uid || fs->st_gid != ts.st_gid)
|
|
if (fd ? fchown(fd, fs->st_uid, fs->st_gid) :
|
|
chown(to.p_path, fs->st_uid, fs->st_gid)) {
|
|
if (errno != EPERM) {
|
|
warn("chown: %s", to.p_path);
|
|
rval = 1;
|
|
}
|
|
fs->st_mode &= ~(S_ISUID | S_ISGID);
|
|
}
|
|
|
|
if (!gotstat || fs->st_mode != ts.st_mode)
|
|
if (fd ? fchmod(fd, fs->st_mode) : chmod(to.p_path, fs->st_mode)) {
|
|
warn("chown: %s", to.p_path);
|
|
rval = 1;
|
|
}
|
|
|
|
if (!gotstat || fs->st_flags != ts.st_flags)
|
|
if (fd ?
|
|
fchflags(fd, fs->st_flags) : chflags(to.p_path, fs->st_flags)) {
|
|
warn("chflags: %s", to.p_path);
|
|
rval = 1;
|
|
}
|
|
|
|
return (rval);
|
|
}
|
|
|
|
void
|
|
usage()
|
|
{
|
|
|
|
(void)fprintf(stderr, "%s\n%s\n",
|
|
"usage: cp [-R [-H | -L | -P]] [-f | -i] [-pv] src target",
|
|
" cp [-R [-H | -L | -P]] [-f | -i] [-pv] src1 ... srcN directory");
|
|
exit(1);
|
|
}
|