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/* $OpenBSD: cp.c,v 1.43 2016/03/07 18:56:33 tb Exp $ */ |
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/* $NetBSD: cp.c,v 1.14 1995/09/07 06:14:51 jtc Exp $ */ |
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/* |
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* Copyright (c) 1988, 1993, 1994 |
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* The Regents of the University of California. All rights reserved. |
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* |
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* This code is derived from software contributed to Berkeley by |
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* David Hitz of Auspex Systems Inc. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of the University nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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/* |
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* Cp copies source files to target files. |
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* |
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* The global PATH_T structure "to" always contains the path to the |
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* current target file. Since fts(3) does not change directories, |
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* this path can be either absolute or dot-relative. |
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* |
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* The basic algorithm is to initialize "to" and use fts(3) to traverse |
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* the file hierarchy rooted in the argument list. A trivial case is the |
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* case of 'cp file1 file2'. The more interesting case is the case of |
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* 'cp file1 file2 ... fileN dir' where the hierarchy is traversed and the |
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* path (relative to the root of the traversal) is appended to dir (stored |
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* in "to") to form the final target path. |
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*/ |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <sys/mman.h> |
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#include <sys/time.h> |
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#include <dirent.h> |
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#include <err.h> |
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#include <errno.h> |
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#include <fcntl.h> |
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#include <fts.h> |
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#include <locale.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <unistd.h> |
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#include <limits.h> |
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#include "extern.h" |
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#define fts_dne(_x) (_x->fts_pointer != NULL) |
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PATH_T to = { to.p_path, "" }; |
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uid_t myuid; |
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int Rflag, fflag, iflag, pflag, rflag; |
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mode_t myumask; |
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enum op { FILE_TO_FILE, FILE_TO_DIR, DIR_TO_DNE }; |
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int copy(char *[], enum op, int); |
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char *find_last_component(char *); |
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int |
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main(int argc, char *argv[]) |
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{ |
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struct stat to_stat, tmp_stat; |
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enum op type; |
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int Hflag, Lflag, Pflag, ch, fts_options, r; |
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char *target; |
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(void)setlocale(LC_ALL, ""); |
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Hflag = Lflag = Pflag = Rflag = 0; |
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✗✓ |
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while ((ch = getopt(argc, argv, "HLPRfipr")) != -1) |
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switch (ch) { |
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case 'H': |
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Hflag = 1; |
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Lflag = Pflag = 0; |
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break; |
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case 'L': |
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Lflag = 1; |
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Hflag = Pflag = 0; |
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break; |
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case 'P': |
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Pflag = 1; |
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Hflag = Lflag = 0; |
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break; |
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case 'R': |
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Rflag = 1; |
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break; |
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case 'f': |
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fflag = 1; |
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iflag = 0; |
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break; |
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case 'i': |
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iflag = 1; |
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fflag = 0; |
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break; |
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case 'p': |
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pflag = 1; |
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break; |
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case 'r': |
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rflag = 1; |
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break; |
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default: |
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usage(); |
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break; |
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} |
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argc -= optind; |
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argv += optind; |
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/* |
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* Unfortunately, -R will use mkfifo & mknod; |
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* -p will use fchown, fchmod, lchown, fchflags.. |
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*/ |
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✓✗✓✗
|
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if (Rflag == 0 && pflag == 0) |
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✗✓ |
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if (pledge("stdio rpath wpath cpath fattr", NULL) == -1) |
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err(1, "pledge"); |
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✗✓ |
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if (argc < 2) |
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usage(); |
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|
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fts_options = FTS_NOCHDIR | FTS_PHYSICAL; |
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✗✓ |
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if (rflag) { |
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if (Rflag) |
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errx(1, |
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"the -R and -r options may not be specified together."); |
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if (Hflag || Lflag || Pflag) |
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errx(1, |
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"the -H, -L, and -P options may not be specified with the -r option."); |
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fts_options &= ~FTS_PHYSICAL; |
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fts_options |= FTS_LOGICAL; |
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} |
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✗✓ |
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if (Rflag) { |
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if (Hflag) |
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fts_options |= FTS_COMFOLLOW; |
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if (Lflag) { |
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fts_options &= ~FTS_PHYSICAL; |
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fts_options |= FTS_LOGICAL; |
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} |
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} else { |
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fts_options &= ~FTS_PHYSICAL; |
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fts_options |= FTS_LOGICAL; |
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} |
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|
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myuid = getuid(); |
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/* Copy the umask for explicit mode setting. */ |
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myumask = umask(0); |
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(void)umask(myumask); |
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/* Save the target base in "to". */ |
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target = argv[--argc]; |
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✗✓ |
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if (strlcpy(to.p_path, target, sizeof to.p_path) >= sizeof(to.p_path)) |
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errx(1, "%s: name too long", target); |
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to.p_end = to.p_path + strlen(to.p_path); |
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✗✓ |
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if (to.p_path == to.p_end) { |
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*to.p_end++ = '.'; |
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*to.p_end = '\0'; |
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} |
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to.target_end = to.p_end; |
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/* Set end of argument list for fts(3). */ |
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argv[argc] = NULL; |
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/* |
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* Cp has two distinct cases: |
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* |
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* cp [-R] source target |
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* cp [-R] source1 ... sourceN directory |
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* |
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* In both cases, source can be either a file or a directory. |
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* |
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* In (1), the target becomes a copy of the source. That is, if the |
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* source is a file, the target will be a file, and likewise for |
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* directories. |
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* |
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* In (2), the real target is not directory, but "directory/source". |
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*/ |
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r = stat(to.p_path, &to_stat); |
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✓✓✗✓
|
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if (r == -1 && errno != ENOENT) |
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err(1, "%s", to.p_path); |
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✓✓✓✓
|
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if (r == -1 || !S_ISDIR(to_stat.st_mode)) { |
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/* |
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* Case (1). Target is not a directory. |
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*/ |
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✗✓ |
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if (argc > 1) |
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usage(); |
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/* |
210 |
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* Need to detect the case: |
211 |
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* cp -R dir foo |
212 |
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* Where dir is a directory and foo does not exist, where |
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* we want pathname concatenations turned on but not for |
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* the initial mkdir(). |
215 |
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*/ |
216 |
✓✓ |
82 |
if (r == -1) { |
217 |
✓✗✗✓ ✗✗ |
62 |
if (rflag || (Rflag && (Lflag || Hflag))) |
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stat(*argv, &tmp_stat); |
219 |
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else |
220 |
|
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lstat(*argv, &tmp_stat); |
221 |
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222 |
✗✓✗✗ ✗✗ |
62 |
if (S_ISDIR(tmp_stat.st_mode) && (Rflag || rflag)) |
223 |
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type = DIR_TO_DNE; |
224 |
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else |
225 |
|
62 |
type = FILE_TO_FILE; |
226 |
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} else |
227 |
|
20 |
type = FILE_TO_FILE; |
228 |
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} else { |
229 |
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/* |
230 |
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* Case (2). Target is a directory. |
231 |
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*/ |
232 |
|
1 |
type = FILE_TO_DIR; |
233 |
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} |
234 |
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235 |
|
83 |
exit(copy(argv, type, fts_options)); |
236 |
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} |
237 |
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238 |
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char * |
239 |
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find_last_component(char *path) |
240 |
|
1 |
{ |
241 |
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char *p; |
242 |
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|
243 |
✗✓ |
1 |
if ((p = strrchr(path, '/')) == NULL) |
244 |
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p = path; |
245 |
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else { |
246 |
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/* Special case foo/ */ |
247 |
✗✓ |
1 |
if (!*(p+1)) { |
248 |
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while ((p >= path) && *p == '/') |
249 |
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p--; |
250 |
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251 |
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while ((p >= path) && *p != '/') |
252 |
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p--; |
253 |
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} |
254 |
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255 |
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1 |
p++; |
256 |
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} |
257 |
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258 |
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1 |
return (p); |
259 |
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} |
260 |
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261 |
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int |
262 |
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copy(char *argv[], enum op type, int fts_options) |
263 |
|
83 |
{ |
264 |
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struct stat to_stat; |
265 |
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FTS *ftsp; |
266 |
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FTSENT *curr; |
267 |
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int base, nlen, rval; |
268 |
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char *p, *target_mid; |
269 |
|
83 |
base = 0; |
270 |
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|
271 |
✗✓ |
83 |
if ((ftsp = fts_open(argv, fts_options, NULL)) == NULL) |
272 |
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err(1, NULL); |
273 |
✓✓ |
249 |
for (rval = 0; (curr = fts_read(ftsp)) != NULL;) { |
274 |
✗✗✓ |
83 |
switch (curr->fts_info) { |
275 |
|
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case FTS_NS: |
276 |
|
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case FTS_DNR: |
277 |
|
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case FTS_ERR: |
278 |
|
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warnx("%s: %s", |
279 |
|
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curr->fts_path, strerror(curr->fts_errno)); |
280 |
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rval = 1; |
281 |
|
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continue; |
282 |
|
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case FTS_DC: |
283 |
|
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warnx("%s: directory causes a cycle", curr->fts_path); |
284 |
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rval = 1; |
285 |
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continue; |
286 |
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} |
287 |
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|
288 |
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/* |
289 |
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* If we are in case (2) or (3) above, we need to append the |
290 |
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* source name to the target name. |
291 |
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*/ |
292 |
✓✓ |
83 |
if (type != FILE_TO_FILE) { |
293 |
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/* |
294 |
|
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* Need to remember the roots of traversals to create |
295 |
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* correct pathnames. If there's a directory being |
296 |
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* copied to a non-existent directory, e.g. |
297 |
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* cp -R a/dir noexist |
298 |
|
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* the resulting path name should be noexist/foo, not |
299 |
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* noexist/dir/foo (where foo is a file in dir), which |
300 |
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* is the case where the target exists. |
301 |
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* |
302 |
|
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* Also, check for "..". This is for correct path |
303 |
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* concatenation for paths ending in "..", e.g. |
304 |
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* cp -R .. /tmp |
305 |
|
|
* Paths ending in ".." are changed to ".". This is |
306 |
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* tricky, but seems the easiest way to fix the problem. |
307 |
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* |
308 |
|
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* XXX |
309 |
|
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* Since the first level MUST be FTS_ROOTLEVEL, base |
310 |
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* is always initialized. |
311 |
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*/ |
312 |
✓✗ |
1 |
if (curr->fts_level == FTS_ROOTLEVEL) { |
313 |
✓✗ |
1 |
if (type != DIR_TO_DNE) { |
314 |
|
1 |
p = find_last_component(curr->fts_path); |
315 |
|
1 |
base = p - curr->fts_path; |
316 |
|
|
|
317 |
✗✓ |
1 |
if (!strcmp(&curr->fts_path[base], |
318 |
|
|
"..")) |
319 |
|
|
base += 1; |
320 |
|
|
} else |
321 |
|
|
base = curr->fts_pathlen; |
322 |
|
|
} |
323 |
|
|
|
324 |
|
1 |
p = &curr->fts_path[base]; |
325 |
|
1 |
nlen = curr->fts_pathlen - base; |
326 |
|
1 |
target_mid = to.target_end; |
327 |
✓✗✓✗
|
1 |
if (*p != '/' && target_mid[-1] != '/') |
328 |
|
1 |
*target_mid++ = '/'; |
329 |
|
1 |
*target_mid = '\0'; |
330 |
✗✓ |
1 |
if (target_mid - to.p_path + nlen >= PATH_MAX) { |
331 |
|
|
warnx("%s%s: name too long (not copied)", |
332 |
|
|
to.p_path, p); |
333 |
|
|
rval = 1; |
334 |
|
|
continue; |
335 |
|
|
} |
336 |
|
1 |
(void)strncat(target_mid, p, nlen); |
337 |
|
1 |
to.p_end = target_mid + nlen; |
338 |
|
1 |
*to.p_end = '\0'; |
339 |
|
|
} |
340 |
|
|
|
341 |
|
|
/* Not an error but need to remember it happened */ |
342 |
✓✓ |
83 |
if (stat(to.p_path, &to_stat) == -1) { |
343 |
✗✓ |
63 |
if (curr->fts_info == FTS_DP) |
344 |
|
|
continue; |
345 |
|
|
/* |
346 |
|
|
* We use fts_pointer as a boolean to indicate that |
347 |
|
|
* we created this directory ourselves. We'll use |
348 |
|
|
* this later on via the fts_dne macro to decide |
349 |
|
|
* whether or not to set the directory mode during |
350 |
|
|
* the post-order pass. |
351 |
|
|
*/ |
352 |
|
63 |
curr->fts_pointer = (void *)1; |
353 |
|
|
} else { |
354 |
|
|
/* |
355 |
|
|
* Set directory mode/user/times on the post-order |
356 |
|
|
* pass. We can't do this earlier because the mode |
357 |
|
|
* may not allow us write permission. Furthermore, |
358 |
|
|
* if we set the times during the pre-order pass, |
359 |
|
|
* they will get changed later when the directory |
360 |
|
|
* is populated. |
361 |
|
|
*/ |
362 |
✗✓ |
20 |
if (curr->fts_info == FTS_DP) { |
363 |
|
|
if (!S_ISDIR(to_stat.st_mode)) |
364 |
|
|
continue; |
365 |
|
|
/* |
366 |
|
|
* If not -p and directory didn't exist, set |
367 |
|
|
* it to be the same as the from directory, |
368 |
|
|
* unmodified by the umask; arguably wrong, |
369 |
|
|
* but it's been that way forever. |
370 |
|
|
*/ |
371 |
|
|
if (pflag && setfile(curr->fts_statp, -1)) |
372 |
|
|
rval = 1; |
373 |
|
|
else if (fts_dne(curr)) |
374 |
|
|
(void)chmod(to.p_path, |
375 |
|
|
curr->fts_statp->st_mode); |
376 |
|
|
continue; |
377 |
|
|
} |
378 |
✓✗✗✓
|
20 |
if (to_stat.st_dev == curr->fts_statp->st_dev && |
379 |
|
|
to_stat.st_ino == curr->fts_statp->st_ino) { |
380 |
|
|
warnx("%s and %s are identical (not copied).", |
381 |
|
|
to.p_path, curr->fts_path); |
382 |
|
|
rval = 1; |
383 |
|
|
if (S_ISDIR(curr->fts_statp->st_mode)) |
384 |
|
|
(void)fts_set(ftsp, curr, FTS_SKIP); |
385 |
|
|
continue; |
386 |
|
|
} |
387 |
✓✗✗✓
|
20 |
if (!S_ISDIR(curr->fts_statp->st_mode) && |
388 |
|
|
S_ISDIR(to_stat.st_mode)) { |
389 |
|
|
warnx("cannot overwrite directory %s with non-directory %s", |
390 |
|
|
to.p_path, curr->fts_path); |
391 |
|
|
rval = 1; |
392 |
|
|
continue; |
393 |
|
|
} |
394 |
|
|
} |
395 |
|
|
|
396 |
✗✗✗✗ ✗✓ |
83 |
switch (curr->fts_statp->st_mode & S_IFMT) { |
397 |
|
|
case S_IFLNK: |
398 |
|
|
if (copy_link(curr, !fts_dne(curr))) |
399 |
|
|
rval = 1; |
400 |
|
|
break; |
401 |
|
|
case S_IFDIR: |
402 |
|
|
if (!Rflag && !rflag) { |
403 |
|
|
warnx("%s is a directory (not copied).", |
404 |
|
|
curr->fts_path); |
405 |
|
|
(void)fts_set(ftsp, curr, FTS_SKIP); |
406 |
|
|
rval = 1; |
407 |
|
|
break; |
408 |
|
|
} |
409 |
|
|
/* |
410 |
|
|
* If the directory doesn't exist, create the new |
411 |
|
|
* one with the from file mode plus owner RWX bits, |
412 |
|
|
* modified by the umask. Trade-off between being |
413 |
|
|
* able to write the directory (if from directory is |
414 |
|
|
* 555) and not causing a permissions race. If the |
415 |
|
|
* umask blocks owner writes, we fail.. |
416 |
|
|
*/ |
417 |
|
|
if (fts_dne(curr)) { |
418 |
|
|
if (mkdir(to.p_path, |
419 |
|
|
curr->fts_statp->st_mode | S_IRWXU) < 0) |
420 |
|
|
err(1, "%s", to.p_path); |
421 |
|
|
} else if (!S_ISDIR(to_stat.st_mode)) |
422 |
|
|
errc(1, ENOTDIR, "%s", to.p_path); |
423 |
|
|
break; |
424 |
|
|
case S_IFBLK: |
425 |
|
|
case S_IFCHR: |
426 |
|
|
if (Rflag) { |
427 |
|
|
if (copy_special(curr->fts_statp, !fts_dne(curr))) |
428 |
|
|
rval = 1; |
429 |
|
|
} else |
430 |
|
|
if (copy_file(curr, fts_dne(curr))) |
431 |
|
|
rval = 1; |
432 |
|
|
break; |
433 |
|
|
case S_IFIFO: |
434 |
|
|
if (Rflag) { |
435 |
|
|
if (copy_fifo(curr->fts_statp, !fts_dne(curr))) |
436 |
|
|
rval = 1; |
437 |
|
|
} else |
438 |
|
|
if (copy_file(curr, fts_dne(curr))) |
439 |
|
|
rval = 1; |
440 |
|
|
break; |
441 |
|
|
case S_IFSOCK: |
442 |
|
|
warnc(EOPNOTSUPP, "%s", curr->fts_path); |
443 |
|
|
break; |
444 |
|
|
default: |
445 |
✗✓ |
83 |
if (copy_file(curr, fts_dne(curr))) |
446 |
|
|
rval = 1; |
447 |
|
|
break; |
448 |
|
|
} |
449 |
|
|
} |
450 |
✗✓ |
83 |
if (errno) |
451 |
|
|
err(1, "fts_read"); |
452 |
|
83 |
(void)fts_close(ftsp); |
453 |
|
83 |
return (rval); |
454 |
|
|
} |