552 lines
14 KiB
C
552 lines
14 KiB
C
/* $NetBSD: cp.c,v 1.58 2012/01/04 15:58:37 christos Exp $ */
|
|
|
|
/*
|
|
* 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.
|
|
* 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/cdefs.h>
|
|
#ifndef lint
|
|
__COPYRIGHT(
|
|
"@(#) Copyright (c) 1988, 1993, 1994\
|
|
The Regents of the University of California. All rights reserved.");
|
|
#endif /* not lint */
|
|
|
|
#ifndef lint
|
|
#if 0
|
|
static char sccsid[] = "@(#)cp.c 8.5 (Berkeley) 4/29/95";
|
|
#else
|
|
__RCSID("$NetBSD: cp.c,v 1.58 2012/01/04 15:58:37 christos Exp $");
|
|
#endif
|
|
#endif /* not lint */
|
|
|
|
/*
|
|
* 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/param.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include <assert.h>
|
|
#include <err.h>
|
|
#include <errno.h>
|
|
#include <fts.h>
|
|
#include <locale.h>
|
|
#include <signal.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.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 empty[] = "";
|
|
PATH_T to = { .p_end = to.p_path, .target_end = empty };
|
|
|
|
uid_t myuid;
|
|
int Hflag, Lflag, Rflag, Pflag, fflag, iflag, lflag, pflag, rflag, vflag, Nflag;
|
|
mode_t myumask;
|
|
sig_atomic_t pinfo;
|
|
|
|
enum op { FILE_TO_FILE, FILE_TO_DIR, DIR_TO_DNE };
|
|
|
|
static int copy(char *[], enum op, int);
|
|
|
|
static void
|
|
progress(int sig __unused)
|
|
{
|
|
|
|
pinfo++;
|
|
}
|
|
|
|
int
|
|
cp_main(int argc, char *argv[])
|
|
{
|
|
struct stat to_stat, tmp_stat;
|
|
enum op type;
|
|
int ch, fts_options, r, have_trailing_slash;
|
|
char *target, **src;
|
|
|
|
#ifndef ANDROID
|
|
setprogname(argv[0]);
|
|
#endif
|
|
(void)setlocale(LC_ALL, "");
|
|
|
|
Hflag = Lflag = Pflag = Rflag = 0;
|
|
while ((ch = getopt(argc, argv, "HLNPRfailprv")) != -1)
|
|
switch (ch) {
|
|
case 'H':
|
|
Hflag = 1;
|
|
Lflag = Pflag = 0;
|
|
break;
|
|
case 'L':
|
|
Lflag = 1;
|
|
Hflag = Pflag = 0;
|
|
break;
|
|
case 'N':
|
|
Nflag = 1;
|
|
break;
|
|
case 'P':
|
|
Pflag = 1;
|
|
Hflag = Lflag = 0;
|
|
break;
|
|
case 'R':
|
|
Rflag = 1;
|
|
break;
|
|
case 'a':
|
|
Pflag = 1;
|
|
pflag = 1;
|
|
Rflag = 1;
|
|
Hflag = Lflag = 0;
|
|
break;
|
|
case 'f':
|
|
fflag = 1;
|
|
iflag = 0;
|
|
break;
|
|
case 'i':
|
|
iflag = isatty(fileno(stdin));
|
|
fflag = 0;
|
|
break;
|
|
case 'l':
|
|
lflag = 1;
|
|
break;
|
|
case 'p':
|
|
pflag = 1;
|
|
break;
|
|
case 'r':
|
|
rflag = 1;
|
|
break;
|
|
case 'v':
|
|
vflag = 1;
|
|
break;
|
|
case '?':
|
|
default:
|
|
cp_usage();
|
|
/* NOTREACHED */
|
|
}
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
if (argc < 2)
|
|
cp_usage();
|
|
|
|
fts_options = FTS_NOCHDIR | FTS_PHYSICAL;
|
|
if (rflag) {
|
|
if (Rflag) {
|
|
errx(EXIT_FAILURE,
|
|
"the -R and -r options may not be specified together.");
|
|
/* NOTREACHED */
|
|
}
|
|
if (Hflag || Lflag || Pflag) {
|
|
errx(EXIT_FAILURE,
|
|
"the -H, -L, and -P options may not be specified with the -r option.");
|
|
/* NOTREACHED */
|
|
}
|
|
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 if (!Pflag) {
|
|
fts_options &= ~FTS_PHYSICAL;
|
|
fts_options |= FTS_LOGICAL | FTS_COMFOLLOW;
|
|
}
|
|
|
|
myuid = getuid();
|
|
|
|
/* Copy the umask for explicit mode setting. */
|
|
myumask = umask(0);
|
|
(void)umask(myumask);
|
|
|
|
/* Save the target base in "to". */
|
|
target = argv[--argc];
|
|
if (strlcpy(to.p_path, target, sizeof(to.p_path)) >= sizeof(to.p_path))
|
|
errx(EXIT_FAILURE, "%s: name too long", target);
|
|
to.p_end = to.p_path + strlen(to.p_path);
|
|
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;
|
|
|
|
#ifndef ANDROID
|
|
(void)signal(SIGINFO, progress);
|
|
#endif
|
|
|
|
/*
|
|
* 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".
|
|
*/
|
|
if (Pflag)
|
|
r = lstat(to.p_path, &to_stat);
|
|
else
|
|
r = stat(to.p_path, &to_stat);
|
|
if (r == -1 && errno != ENOENT) {
|
|
err(EXIT_FAILURE, "%s", to.p_path);
|
|
/* NOTREACHED */
|
|
}
|
|
if (r == -1 || !S_ISDIR(to_stat.st_mode)) {
|
|
/*
|
|
* Case (1). Target is not a directory.
|
|
*/
|
|
if (argc > 1)
|
|
cp_usage();
|
|
/*
|
|
* 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)))
|
|
r = stat(*argv, &tmp_stat);
|
|
else
|
|
r = lstat(*argv, &tmp_stat);
|
|
if (r == -1) {
|
|
err(EXIT_FAILURE, "%s", *argv);
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* make "cp -rp src/ dst" behave like "cp -rp src dst" not
|
|
* like "cp -rp src/. dst"
|
|
*/
|
|
for (src = argv; *src; src++) {
|
|
size_t len = strlen(*src);
|
|
while (len-- > 1 && (*src)[len] == '/')
|
|
(*src)[len] = '\0';
|
|
}
|
|
|
|
exit(copy(argv, type, fts_options));
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
static int dnestack[MAXPATHLEN]; /* unlikely we'll have more nested dirs */
|
|
static ssize_t dnesp;
|
|
static void
|
|
pushdne(int dne)
|
|
{
|
|
|
|
dnestack[dnesp++] = dne;
|
|
assert(dnesp < MAXPATHLEN);
|
|
}
|
|
|
|
static int
|
|
popdne(void)
|
|
{
|
|
int rv;
|
|
|
|
rv = dnestack[--dnesp];
|
|
assert(dnesp >= 0);
|
|
return rv;
|
|
}
|
|
|
|
static int
|
|
copy(char *argv[], enum op type, int fts_options)
|
|
{
|
|
struct stat to_stat;
|
|
FTS *ftsp;
|
|
FTSENT *curr;
|
|
int base, dne, sval;
|
|
int this_failed, any_failed;
|
|
size_t nlen;
|
|
char *p, *target_mid;
|
|
|
|
base = 0; /* XXX gcc -Wuninitialized (see comment below) */
|
|
|
|
if ((ftsp = fts_open(argv, fts_options, NULL)) == NULL)
|
|
err(EXIT_FAILURE, "%s", argv[0]);
|
|
/* NOTREACHED */
|
|
for (any_failed = 0; (curr = fts_read(ftsp)) != NULL;) {
|
|
this_failed = 0;
|
|
switch (curr->fts_info) {
|
|
case FTS_NS:
|
|
case FTS_DNR:
|
|
case FTS_ERR:
|
|
warnx("%s: %s", curr->fts_path,
|
|
strerror(curr->fts_errno));
|
|
this_failed = any_failed = 1;
|
|
continue;
|
|
case FTS_DC: /* Warn, continue. */
|
|
warnx("%s: directory causes a cycle", curr->fts_path);
|
|
this_failed = any_failed = 1;
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* 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) {
|
|
if ((curr->fts_namelen +
|
|
to.target_end - to.p_path + 1) > MAXPATHLEN) {
|
|
warnx("%s/%s: name too long (not copied)",
|
|
to.p_path, curr->fts_name);
|
|
this_failed = any_failed = 1;
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* 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
|
|
* concatentation 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);
|
|
this_failed = any_failed = 1;
|
|
continue;
|
|
}
|
|
(void)strncat(target_mid, p, nlen);
|
|
to.p_end = target_mid + nlen;
|
|
*to.p_end = 0;
|
|
STRIP_TRAILING_SLASH(to);
|
|
}
|
|
|
|
sval = Pflag ? lstat(to.p_path, &to_stat) : stat(to.p_path, &to_stat);
|
|
/* Not an error but need to remember it happened */
|
|
if (sval == -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);
|
|
this_failed = any_failed = 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);
|
|
this_failed = any_failed = 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))
|
|
this_failed = any_failed = 1;
|
|
} else {
|
|
if (copy_link(curr, !dne))
|
|
this_failed = any_failed = 1;
|
|
}
|
|
break;
|
|
case S_IFDIR:
|
|
if (!Rflag && !rflag) {
|
|
if (curr->fts_info == FTS_D)
|
|
warnx("%s is a directory (not copied).",
|
|
curr->fts_path);
|
|
(void)fts_set(ftsp, curr, FTS_SKIP);
|
|
this_failed = any_failed = 1;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Directories get noticed twice:
|
|
* In the first pass, create it if needed.
|
|
* In the second pass, after the children have been copied, set the permissions.
|
|
*/
|
|
if (curr->fts_info == FTS_D) /* First pass */
|
|
{
|
|
/*
|
|
* 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..
|
|
*/
|
|
pushdne(dne);
|
|
if (dne) {
|
|
if (mkdir(to.p_path,
|
|
curr->fts_statp->st_mode | S_IRWXU) < 0)
|
|
err(EXIT_FAILURE, "%s",
|
|
to.p_path);
|
|
/* NOTREACHED */
|
|
} else if (!S_ISDIR(to_stat.st_mode)) {
|
|
errno = ENOTDIR;
|
|
err(EXIT_FAILURE, "%s",
|
|
to.p_path);
|
|
/* NOTREACHED */
|
|
}
|
|
}
|
|
else if (curr->fts_info == FTS_DP) /* Second pass */
|
|
{
|
|
/*
|
|
* If not -p and directory didn't exist, set it to be
|
|
* the same as the from directory, umodified by the
|
|
* umask; arguably wrong, but it's been that way
|
|
* forever.
|
|
*/
|
|
if (pflag && setfile(curr->fts_statp, 0))
|
|
this_failed = any_failed = 1;
|
|
else if ((dne = popdne()))
|
|
(void)chmod(to.p_path,
|
|
curr->fts_statp->st_mode);
|
|
}
|
|
else
|
|
{
|
|
warnx("directory %s encountered when not expected.",
|
|
curr->fts_path);
|
|
this_failed = any_failed = 1;
|
|
break;
|
|
}
|
|
|
|
break;
|
|
case S_IFBLK:
|
|
case S_IFCHR:
|
|
if (Rflag) {
|
|
if (copy_special(curr->fts_statp, !dne))
|
|
this_failed = any_failed = 1;
|
|
} else
|
|
if (copy_file(curr, dne))
|
|
this_failed = any_failed = 1;
|
|
break;
|
|
case S_IFIFO:
|
|
if (Rflag) {
|
|
if (copy_fifo(curr->fts_statp, !dne))
|
|
this_failed = any_failed = 1;
|
|
} else
|
|
if (copy_file(curr, dne))
|
|
this_failed = any_failed = 1;
|
|
break;
|
|
default:
|
|
if (copy_file(curr, dne))
|
|
this_failed = any_failed = 1;
|
|
break;
|
|
}
|
|
if (vflag && !this_failed)
|
|
(void)printf("%s -> %s\n", curr->fts_path, to.p_path);
|
|
}
|
|
if (errno) {
|
|
err(EXIT_FAILURE, "fts_read");
|
|
/* NOTREACHED */
|
|
}
|
|
(void)fts_close(ftsp);
|
|
return (any_failed);
|
|
}
|