511 lines
13 KiB
C
511 lines
13 KiB
C
/*
|
|
* Copyright (c) 1988, 1993, 1994
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* David Hitz of Auspex Systems Inc.
|
|
*
|
|
* 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.
|
|
* 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.
|
|
*/
|
|
|
|
#if 0
|
|
#ifndef lint
|
|
static char const copyright[] =
|
|
"@(#) Copyright (c) 1988, 1993, 1994\n\
|
|
The Regents of the University of California. All rights reserved.\n";
|
|
#endif /* not lint */
|
|
|
|
#ifndef lint
|
|
static char sccsid[] = "@(#)cp.c 8.2 (Berkeley) 4/1/94";
|
|
#endif /* not lint */
|
|
#endif
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
/*
|
|
* Cp copies source files to target files.
|
|
*
|
|
* The global PATH_T structure "to" always contains the path to the
|
|
* current target file. Since fts(3) does not change directories,
|
|
* this path can be either absolute or dot-relative.
|
|
*
|
|
* The basic algorithm is to initialize "to" and use fts(3) to traverse
|
|
* the file hierarchy rooted in the argument list. A trivial case is the
|
|
* case of 'cp file1 file2'. The more interesting case is the case of
|
|
* 'cp file1 file2 ... fileN dir' where the hierarchy is traversed and the
|
|
* path (relative to the root of the traversal) is appended to dir (stored
|
|
* in "to") to form the final target path.
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include <err.h>
|
|
#include <errno.h>
|
|
#include <fts.h>
|
|
#include <limits.h>
|
|
#include <signal.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include "extern.h"
|
|
|
|
#define STRIP_TRAILING_SLASH(p) { \
|
|
while ((p).p_end > (p).p_path + 1 && (p).p_end[-1] == '/') \
|
|
*--(p).p_end = 0; \
|
|
}
|
|
|
|
static char emptystring[] = "";
|
|
|
|
PATH_T to = { to.p_path, emptystring, "" };
|
|
|
|
int fflag, iflag, nflag, pflag, vflag;
|
|
static int Rflag, rflag;
|
|
volatile sig_atomic_t info;
|
|
|
|
enum op { FILE_TO_FILE, FILE_TO_DIR, DIR_TO_DNE };
|
|
|
|
static int copy(char *[], enum op, int);
|
|
static int mastercmp(const FTSENT * const *, const FTSENT * const *);
|
|
static void siginfo(int __unused);
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
struct stat to_stat, tmp_stat;
|
|
enum op type;
|
|
int Hflag, Lflag, Pflag, ch, fts_options, r, have_trailing_slash;
|
|
char *target;
|
|
|
|
Hflag = Lflag = Pflag = 0;
|
|
while ((ch = getopt(argc, argv, "HLPRfinprv")) != -1)
|
|
switch (ch) {
|
|
case 'H':
|
|
Hflag = 1;
|
|
Lflag = Pflag = 0;
|
|
break;
|
|
case 'L':
|
|
Lflag = 1;
|
|
Hflag = Pflag = 0;
|
|
break;
|
|
case 'P':
|
|
Pflag = 1;
|
|
Hflag = Lflag = 0;
|
|
break;
|
|
case 'R':
|
|
Rflag = 1;
|
|
break;
|
|
case 'f':
|
|
fflag = 1;
|
|
iflag = nflag = 0;
|
|
break;
|
|
case 'i':
|
|
iflag = 1;
|
|
fflag = nflag = 0;
|
|
break;
|
|
case 'n':
|
|
nflag = 1;
|
|
fflag = iflag = 0;
|
|
break;
|
|
case 'p':
|
|
pflag = 1;
|
|
break;
|
|
case 'r':
|
|
rflag = 1;
|
|
break;
|
|
case 'v':
|
|
vflag = 1;
|
|
break;
|
|
default:
|
|
usage();
|
|
break;
|
|
}
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
if (argc < 2)
|
|
usage();
|
|
|
|
fts_options = FTS_NOCHDIR | FTS_PHYSICAL;
|
|
if (rflag) {
|
|
if (Rflag)
|
|
errx(1,
|
|
"the -R and -r options may not be specified together.");
|
|
if (Hflag || Lflag || Pflag)
|
|
errx(1,
|
|
"the -H, -L, and -P options may not be specified with the -r option.");
|
|
fts_options &= ~FTS_PHYSICAL;
|
|
fts_options |= FTS_LOGICAL;
|
|
}
|
|
if (Rflag) {
|
|
if (Hflag)
|
|
fts_options |= FTS_COMFOLLOW;
|
|
if (Lflag) {
|
|
fts_options &= ~FTS_PHYSICAL;
|
|
fts_options |= FTS_LOGICAL;
|
|
}
|
|
} else {
|
|
fts_options &= ~FTS_PHYSICAL;
|
|
fts_options |= FTS_LOGICAL | FTS_COMFOLLOW;
|
|
}
|
|
(void)signal(SIGINFO, siginfo);
|
|
|
|
/* Save the target base in "to". */
|
|
target = argv[--argc];
|
|
if (strlcpy(to.p_path, target, sizeof(to.p_path)) >= sizeof(to.p_path))
|
|
errx(1, "%s: name too long", target);
|
|
to.p_end = to.p_path + strlen(to.p_path);
|
|
if (to.p_path == to.p_end) {
|
|
*to.p_end++ = '.';
|
|
*to.p_end = 0;
|
|
}
|
|
have_trailing_slash = (to.p_end[-1] == '/');
|
|
if (have_trailing_slash)
|
|
STRIP_TRAILING_SLASH(to);
|
|
to.target_end = to.p_end;
|
|
|
|
/* Set end of argument list for fts(3). */
|
|
argv[argc] = NULL;
|
|
|
|
/*
|
|
* Cp has two distinct cases:
|
|
*
|
|
* cp [-R] source target
|
|
* cp [-R] source1 ... sourceN directory
|
|
*
|
|
* In both cases, source can be either a file or a directory.
|
|
*
|
|
* In (1), the target becomes a copy of the source. That is, if the
|
|
* source is a file, the target will be a file, and likewise for
|
|
* directories.
|
|
*
|
|
* In (2), the real target is not directory, but "directory/source".
|
|
*/
|
|
r = stat(to.p_path, &to_stat);
|
|
if (r == -1 && errno != ENOENT)
|
|
err(1, "%s", to.p_path);
|
|
if (r == -1 || !S_ISDIR(to_stat.st_mode)) {
|
|
/*
|
|
* Case (1). Target is not a directory.
|
|
*/
|
|
if (argc > 1) {
|
|
usage();
|
|
exit(1);
|
|
}
|
|
/*
|
|
* Need to detect the case:
|
|
* cp -R dir foo
|
|
* Where dir is a directory and foo does not exist, where
|
|
* we want pathname concatenations turned on but not for
|
|
* the initial mkdir().
|
|
*/
|
|
if (r == -1) {
|
|
if (rflag || (Rflag && (Lflag || Hflag)))
|
|
stat(*argv, &tmp_stat);
|
|
else
|
|
lstat(*argv, &tmp_stat);
|
|
|
|
if (S_ISDIR(tmp_stat.st_mode) && (Rflag || rflag))
|
|
type = DIR_TO_DNE;
|
|
else
|
|
type = FILE_TO_FILE;
|
|
} else
|
|
type = FILE_TO_FILE;
|
|
|
|
if (have_trailing_slash && type == FILE_TO_FILE) {
|
|
if (r == -1)
|
|
errx(1, "directory %s does not exist",
|
|
to.p_path);
|
|
else
|
|
errx(1, "%s is not a directory", to.p_path);
|
|
}
|
|
} else
|
|
/*
|
|
* Case (2). Target is a directory.
|
|
*/
|
|
type = FILE_TO_DIR;
|
|
|
|
exit (copy(argv, type, fts_options));
|
|
}
|
|
|
|
static int
|
|
copy(char *argv[], enum op type, int fts_options)
|
|
{
|
|
struct stat to_stat;
|
|
FTS *ftsp;
|
|
FTSENT *curr;
|
|
int base = 0, dne, badcp, rval;
|
|
size_t nlen;
|
|
char *p, *target_mid;
|
|
mode_t mask, mode;
|
|
|
|
/*
|
|
* Keep an inverted copy of the umask, for use in correcting
|
|
* permissions on created directories when not using -p.
|
|
*/
|
|
mask = ~umask(0777);
|
|
umask(~mask);
|
|
|
|
if ((ftsp = fts_open(argv, fts_options, mastercmp)) == NULL)
|
|
err(1, "fts_open");
|
|
for (badcp = rval = 0; (curr = fts_read(ftsp)) != NULL; badcp = 0) {
|
|
switch (curr->fts_info) {
|
|
case FTS_NS:
|
|
case FTS_DNR:
|
|
case FTS_ERR:
|
|
warnx("%s: %s",
|
|
curr->fts_path, strerror(curr->fts_errno));
|
|
badcp = rval = 1;
|
|
continue;
|
|
case FTS_DC: /* Warn, continue. */
|
|
warnx("%s: directory causes a cycle", curr->fts_path);
|
|
badcp = rval = 1;
|
|
continue;
|
|
default:
|
|
;
|
|
}
|
|
|
|
/*
|
|
* If we are in case (2) or (3) above, we need to append the
|
|
* source name to the target name.
|
|
*/
|
|
if (type != FILE_TO_FILE) {
|
|
/*
|
|
* Need to remember the roots of traversals to create
|
|
* correct pathnames. If there's a directory being
|
|
* copied to a non-existent directory, e.g.
|
|
* cp -R a/dir noexist
|
|
* the resulting path name should be noexist/foo, not
|
|
* noexist/dir/foo (where foo is a file in dir), which
|
|
* is the case where the target exists.
|
|
*
|
|
* Also, check for "..". This is for correct path
|
|
* concatenation for paths ending in "..", e.g.
|
|
* cp -R .. /tmp
|
|
* Paths ending in ".." are changed to ".". This is
|
|
* tricky, but seems the easiest way to fix the problem.
|
|
*
|
|
* XXX
|
|
* Since the first level MUST be FTS_ROOTLEVEL, base
|
|
* is always initialized.
|
|
*/
|
|
if (curr->fts_level == FTS_ROOTLEVEL) {
|
|
if (type != DIR_TO_DNE) {
|
|
p = strrchr(curr->fts_path, '/');
|
|
base = (p == NULL) ? 0 :
|
|
(int)(p - curr->fts_path + 1);
|
|
|
|
if (!strcmp(&curr->fts_path[base],
|
|
".."))
|
|
base += 1;
|
|
} else
|
|
base = curr->fts_pathlen;
|
|
}
|
|
|
|
p = &curr->fts_path[base];
|
|
nlen = curr->fts_pathlen - base;
|
|
target_mid = to.target_end;
|
|
if (*p != '/' && target_mid[-1] != '/')
|
|
*target_mid++ = '/';
|
|
*target_mid = 0;
|
|
if (target_mid - to.p_path + nlen >= PATH_MAX) {
|
|
warnx("%s%s: name too long (not copied)",
|
|
to.p_path, p);
|
|
badcp = rval = 1;
|
|
continue;
|
|
}
|
|
(void)strncat(target_mid, p, nlen);
|
|
to.p_end = target_mid + nlen;
|
|
*to.p_end = 0;
|
|
STRIP_TRAILING_SLASH(to);
|
|
}
|
|
|
|
if (curr->fts_info == FTS_DP) {
|
|
/*
|
|
* We are nearly finished with this directory. If we
|
|
* didn't actually copy it, or otherwise don't need to
|
|
* change its attributes, then we are done.
|
|
*/
|
|
if (!curr->fts_number)
|
|
continue;
|
|
/*
|
|
* If -p is in effect, set all the attributes.
|
|
* Otherwise, set the correct permissions, limited
|
|
* by the umask. Optimise by avoiding a chmod()
|
|
* if possible (which is usually the case if we
|
|
* made the directory). Note that mkdir() does not
|
|
* honour setuid, setgid and sticky bits, but we
|
|
* normally want to preserve them on directories.
|
|
*/
|
|
if (pflag) {
|
|
if (setfile(curr->fts_statp, -1))
|
|
rval = 1;
|
|
} else {
|
|
mode = curr->fts_statp->st_mode;
|
|
if ((mode & (S_ISUID | S_ISGID | S_ISTXT)) ||
|
|
((mode | S_IRWXU) & mask) != (mode & mask))
|
|
if (chmod(to.p_path, mode & mask) != 0){
|
|
warn("chmod: %s", to.p_path);
|
|
rval = 1;
|
|
}
|
|
}
|
|
continue;
|
|
}
|
|
|
|
/* Not an error but need to remember it happened */
|
|
if (stat(to.p_path, &to_stat) == -1)
|
|
dne = 1;
|
|
else {
|
|
if (to_stat.st_dev == curr->fts_statp->st_dev &&
|
|
to_stat.st_ino == curr->fts_statp->st_ino) {
|
|
warnx("%s and %s are identical (not copied).",
|
|
to.p_path, curr->fts_path);
|
|
badcp = rval = 1;
|
|
if (S_ISDIR(curr->fts_statp->st_mode))
|
|
(void)fts_set(ftsp, curr, FTS_SKIP);
|
|
continue;
|
|
}
|
|
if (!S_ISDIR(curr->fts_statp->st_mode) &&
|
|
S_ISDIR(to_stat.st_mode)) {
|
|
warnx("cannot overwrite directory %s with "
|
|
"non-directory %s",
|
|
to.p_path, curr->fts_path);
|
|
badcp = rval = 1;
|
|
continue;
|
|
}
|
|
dne = 0;
|
|
}
|
|
|
|
switch (curr->fts_statp->st_mode & S_IFMT) {
|
|
case S_IFLNK:
|
|
/* Catch special case of a non-dangling symlink */
|
|
if ((fts_options & FTS_LOGICAL) ||
|
|
((fts_options & FTS_COMFOLLOW) &&
|
|
curr->fts_level == 0)) {
|
|
if (copy_file(curr, dne))
|
|
badcp = rval = 1;
|
|
} else {
|
|
if (copy_link(curr, !dne))
|
|
badcp = rval = 1;
|
|
}
|
|
break;
|
|
case S_IFDIR:
|
|
if (!Rflag && !rflag) {
|
|
warnx("%s is a directory (not copied).",
|
|
curr->fts_path);
|
|
(void)fts_set(ftsp, curr, FTS_SKIP);
|
|
badcp = rval = 1;
|
|
break;
|
|
}
|
|
/*
|
|
* If the directory doesn't exist, create the new
|
|
* one with the from file mode plus owner RWX bits,
|
|
* modified by the umask. Trade-off between being
|
|
* able to write the directory (if from directory is
|
|
* 555) and not causing a permissions race. If the
|
|
* umask blocks owner writes, we fail..
|
|
*/
|
|
if (dne) {
|
|
if (mkdir(to.p_path,
|
|
curr->fts_statp->st_mode | S_IRWXU) < 0)
|
|
err(1, "%s", to.p_path);
|
|
} else if (!S_ISDIR(to_stat.st_mode)) {
|
|
errno = ENOTDIR;
|
|
err(1, "%s", to.p_path);
|
|
}
|
|
/*
|
|
* Arrange to correct directory attributes later
|
|
* (in the post-order phase) if this is a new
|
|
* directory, or if the -p flag is in effect.
|
|
*/
|
|
curr->fts_number = pflag || dne;
|
|
break;
|
|
case S_IFBLK:
|
|
case S_IFCHR:
|
|
if (Rflag) {
|
|
if (copy_special(curr->fts_statp, !dne))
|
|
badcp = rval = 1;
|
|
} else {
|
|
if (copy_file(curr, dne))
|
|
badcp = rval = 1;
|
|
}
|
|
break;
|
|
case S_IFIFO:
|
|
if (Rflag) {
|
|
if (copy_fifo(curr->fts_statp, !dne))
|
|
badcp = rval = 1;
|
|
} else {
|
|
if (copy_file(curr, dne))
|
|
badcp = rval = 1;
|
|
}
|
|
break;
|
|
default:
|
|
if (copy_file(curr, dne))
|
|
badcp = rval = 1;
|
|
break;
|
|
}
|
|
if (vflag && !badcp)
|
|
(void)printf("%s -> %s\n", curr->fts_path, to.p_path);
|
|
}
|
|
if (errno)
|
|
err(1, "fts_read");
|
|
return (rval);
|
|
}
|
|
|
|
/*
|
|
* mastercmp --
|
|
* The comparison function for the copy order. The order is to copy
|
|
* non-directory files before directory files. The reason for this
|
|
* is because files tend to be in the same cylinder group as their
|
|
* parent directory, whereas directories tend not to be. Copying the
|
|
* files first reduces seeking.
|
|
*/
|
|
static int
|
|
mastercmp(const FTSENT * const *a, const FTSENT * const *b)
|
|
{
|
|
int a_info, b_info;
|
|
|
|
a_info = (*a)->fts_info;
|
|
if (a_info == FTS_ERR || a_info == FTS_NS || a_info == FTS_DNR)
|
|
return (0);
|
|
b_info = (*b)->fts_info;
|
|
if (b_info == FTS_ERR || b_info == FTS_NS || b_info == FTS_DNR)
|
|
return (0);
|
|
if (a_info == FTS_D)
|
|
return (-1);
|
|
if (b_info == FTS_D)
|
|
return (1);
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
siginfo(int sig __unused)
|
|
{
|
|
|
|
info = 1;
|
|
}
|