675 lines
18 KiB
C
675 lines
18 KiB
C
/* $OpenBSD: cp.c,v 1.7 2015/12/27 01:25:57 chl 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 <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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#define fts_dne(_x) (_x->fts_pointer != NULL)
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typedef struct {
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char *p_end; /* pointer to NULL at end of path */
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char *target_end; /* pointer to end of target base */
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char p_path[PATH_MAX]; /* pointer to the start of a path */
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} PATH_T;
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static PATH_T to = { to.p_path, "" };
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static int copy_fifo(struct stat *, int);
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static int copy_file(FTSENT *, int);
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static int copy_link(FTSENT *, int);
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static int copy_special(struct stat *, int);
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static int setfile(struct stat *, int);
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extern char *__progname;
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static uid_t myuid;
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static int fflag, iflag;
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static mode_t myumask;
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enum op { FILE_TO_FILE, FILE_TO_DIR, DIR_TO_DNE };
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static int copy(char *[], enum op, int);
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static char *find_last_component(char *);
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static void __dead
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usage(void)
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{
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(void)fprintf(stderr,
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"usage: %s [-fip] [-R [-H | -L | -P]] source target\n", __progname);
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(void)fprintf(stderr,
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" %s [-fip] [-R [-H | -L | -P]] source ... directory\n",
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__progname);
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exit(1);
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}
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int
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cpmain(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 fts_options, r;
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char *target;
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fts_options = FTS_NOCHDIR | FTS_PHYSICAL;
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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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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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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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if (r == -1 && errno != ENOENT)
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err(1, "%s", to.p_path);
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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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if (argc > 1)
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usage();
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/*
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* Need to detect the case:
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* cp -R dir foo
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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().
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*/
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if (r == -1) {
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lstat(*argv, &tmp_stat);
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if (S_ISDIR(tmp_stat.st_mode))
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type = DIR_TO_DNE;
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else
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type = FILE_TO_FILE;
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} else
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type = FILE_TO_FILE;
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} else {
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/*
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* Case (2). Target is a directory.
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*/
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type = FILE_TO_DIR;
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}
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return (copy(argv, type, fts_options));
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}
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static char *
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find_last_component(char *path)
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{
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char *p;
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if ((p = strrchr(path, '/')) == NULL)
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p = path;
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else {
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/* Special case foo/ */
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if (!*(p+1)) {
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while ((p >= path) && *p == '/')
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p--;
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while ((p >= path) && *p != '/')
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p--;
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}
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p++;
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}
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return (p);
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}
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static int
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copy(char *argv[], enum op type, int fts_options)
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{
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struct stat to_stat;
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FTS *ftsp;
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FTSENT *curr;
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int base, nlen, rval;
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char *p, *target_mid;
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base = 0;
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if ((ftsp = fts_open(argv, fts_options, NULL)) == NULL)
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err(1, NULL);
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for (rval = 0; (curr = fts_read(ftsp)) != NULL;) {
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switch (curr->fts_info) {
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case FTS_NS:
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case FTS_DNR:
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case FTS_ERR:
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warnx("%s: %s",
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curr->fts_path, strerror(curr->fts_errno));
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rval = 1;
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continue;
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case FTS_DC:
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warnx("%s: directory causes a cycle", curr->fts_path);
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rval = 1;
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continue;
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}
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/*
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* If we are in case (2) or (3) above, we need to append the
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* source name to the target name.
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*/
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if (type != FILE_TO_FILE) {
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/*
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* Need to remember the roots of traversals to create
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* correct pathnames. If there's a directory being
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* copied to a non-existent directory, e.g.
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* cp -R a/dir noexist
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* the resulting path name should be noexist/foo, not
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* noexist/dir/foo (where foo is a file in dir), which
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* is the case where the target exists.
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*
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* Also, check for "..". This is for correct path
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* concatenation for paths ending in "..", e.g.
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* cp -R .. /tmp
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* Paths ending in ".." are changed to ".". This is
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* tricky, but seems the easiest way to fix the problem.
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*
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* XXX
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* Since the first level MUST be FTS_ROOTLEVEL, base
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* is always initialized.
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*/
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if (curr->fts_level == FTS_ROOTLEVEL) {
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if (type != DIR_TO_DNE) {
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p = find_last_component(curr->fts_path);
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base = p - curr->fts_path;
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if (!strcmp(&curr->fts_path[base],
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".."))
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base += 1;
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} else
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base = curr->fts_pathlen;
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}
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p = &curr->fts_path[base];
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nlen = curr->fts_pathlen - base;
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target_mid = to.target_end;
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if (*p != '/' && target_mid[-1] != '/')
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*target_mid++ = '/';
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*target_mid = '\0';
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if (target_mid - to.p_path + nlen >= PATH_MAX) {
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warnx("%s%s: name too long (not copied)",
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to.p_path, p);
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rval = 1;
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continue;
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}
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(void)strncat(target_mid, p, nlen);
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to.p_end = target_mid + nlen;
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*to.p_end = '\0';
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}
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/* Not an error but need to remember it happened */
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if (stat(to.p_path, &to_stat) == -1) {
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if (curr->fts_info == FTS_DP)
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continue;
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/*
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* We use fts_pointer as a boolean to indicate that
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* we created this directory ourselves. We'll use
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* this later on via the fts_dne macro to decide
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* whether or not to set the directory mode during
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* the post-order pass.
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*/
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curr->fts_pointer = (void *)1;
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} else {
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/*
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* Set directory mode/user/times on the post-order
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* pass. We can't do this earlier because the mode
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* may not allow us write permission. Furthermore,
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* if we set the times during the pre-order pass,
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* they will get changed later when the directory
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* is populated.
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*/
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if (curr->fts_info == FTS_DP) {
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if (!S_ISDIR(to_stat.st_mode))
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continue;
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/*
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* If not -p and directory didn't exist, set
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* it to be the same as the from directory,
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* unmodified by the umask; arguably wrong,
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* but it's been that way forever.
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*/
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if (setfile(curr->fts_statp, -1))
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rval = 1;
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else if (fts_dne(curr))
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(void)chmod(to.p_path,
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curr->fts_statp->st_mode);
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continue;
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}
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if (to_stat.st_dev == curr->fts_statp->st_dev &&
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to_stat.st_ino == curr->fts_statp->st_ino) {
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warnx("%s and %s are identical (not copied).",
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to.p_path, curr->fts_path);
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rval = 1;
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if (S_ISDIR(curr->fts_statp->st_mode))
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(void)fts_set(ftsp, curr, FTS_SKIP);
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continue;
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}
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if (!S_ISDIR(curr->fts_statp->st_mode) &&
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S_ISDIR(to_stat.st_mode)) {
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warnx("cannot overwrite directory %s with non-directory %s",
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to.p_path, curr->fts_path);
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rval = 1;
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continue;
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}
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}
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switch (curr->fts_statp->st_mode & S_IFMT) {
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case S_IFLNK:
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if (copy_link(curr, !fts_dne(curr)))
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rval = 1;
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break;
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case S_IFDIR:
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/*
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* If the directory doesn't exist, create the new
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* one with the from file mode plus owner RWX bits,
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* modified by the umask. Trade-off between being
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* able to write the directory (if from directory is
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* 555) and not causing a permissions race. If the
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* umask blocks owner writes, we fail..
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*/
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if (fts_dne(curr)) {
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if (mkdir(to.p_path,
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curr->fts_statp->st_mode | S_IRWXU) < 0)
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err(1, "%s", to.p_path);
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} else if (!S_ISDIR(to_stat.st_mode))
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errc(1, ENOTDIR, "%s", to.p_path);
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break;
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case S_IFBLK:
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case S_IFCHR:
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if (copy_special(curr->fts_statp, !fts_dne(curr)))
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rval = 1;
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break;
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case S_IFIFO:
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if (copy_fifo(curr->fts_statp, !fts_dne(curr)))
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rval = 1;
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break;
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case S_IFSOCK:
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warnc(EOPNOTSUPP, "%s", curr->fts_path);
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break;
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default:
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if (copy_file(curr, fts_dne(curr)))
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rval = 1;
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break;
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}
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}
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if (errno)
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err(1, "fts_read");
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(void)fts_close(ftsp);
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return (rval);
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}
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/* $OpenBSD: cp.c,v 1.7 2015/12/27 01:25:57 chl Exp $ */
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/* $NetBSD: utils.c,v 1.6 1997/02/26 14:40:51 cgd Exp $ */
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/*-
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* Copyright (c) 1991, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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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
|
|
* 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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#include <sys/param.h> /* MAXBSIZE */
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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 <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 <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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static int
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copy_file(FTSENT *entp, int dne)
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{
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static char *buf;
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static char *zeroes;
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struct stat *fs;
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int ch, checkch, from_fd, rcount, rval, to_fd, wcount;
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#ifdef VM_AND_BUFFER_CACHE_SYNCHRONIZED
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char *p;
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#endif
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if (!buf) {
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buf = malloc(MAXBSIZE);
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if (!buf)
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err(1, "malloc");
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}
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if (!zeroes) {
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zeroes = calloc(1, MAXBSIZE);
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if (!zeroes)
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err(1, "calloc");
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}
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if ((from_fd = open(entp->fts_path, O_RDONLY, 0)) == -1) {
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warn("%s", entp->fts_path);
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return (1);
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}
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fs = entp->fts_statp;
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/*
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* In -f (force) mode, we always unlink the destination first
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* if it exists. Note that -i and -f are mutually exclusive.
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*/
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if (!dne && fflag)
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(void)unlink(to.p_path);
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/*
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* If the file exists and we're interactive, verify with the user.
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* If the file DNE, set the mode to be the from file, minus setuid
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* bits, modified by the umask; arguably wrong, but it makes copying
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* executables work right and it's been that way forever. (The
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* other choice is 666 or'ed with the execute bits on the from file
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* modified by the umask.)
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*/
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if (!dne && !fflag) {
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if (iflag) {
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(void)fprintf(stderr, "overwrite %s? ", to.p_path);
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checkch = ch = getchar();
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while (ch != '\n' && ch != EOF)
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ch = getchar();
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if (checkch != 'y' && checkch != 'Y') {
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(void)close(from_fd);
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return (0);
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}
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}
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to_fd = open(to.p_path, O_WRONLY | O_TRUNC, 0);
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} else
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to_fd = open(to.p_path, O_WRONLY | O_TRUNC | O_CREAT,
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fs->st_mode & ~(S_ISTXT | S_ISUID | S_ISGID));
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if (to_fd == -1) {
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warn("%s", to.p_path);
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(void)close(from_fd);
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return (1);
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}
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rval = 0;
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/*
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* Mmap and write if less than 8M (the limit is so we don't totally
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|
* trash memory on big files. This is really a minor hack, but it
|
|
* wins some CPU back.
|
|
*/
|
|
#ifdef VM_AND_BUFFER_CACHE_SYNCHRONIZED
|
|
/* XXX broken for 0-size mmap */
|
|
if (fs->st_size <= 8 * 1048576) {
|
|
if ((p = mmap(NULL, (size_t)fs->st_size, PROT_READ,
|
|
MAP_FILE|MAP_SHARED, from_fd, (off_t)0)) == MAP_FAILED) {
|
|
warn("mmap: %s", entp->fts_path);
|
|
rval = 1;
|
|
} else {
|
|
madvise(p, fs->st_size, MADV_SEQUENTIAL);
|
|
if (write(to_fd, p, fs->st_size) != fs->st_size) {
|
|
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
|
|
{
|
|
int skipholes = 0;
|
|
struct stat tosb;
|
|
if (!fstat(to_fd, &tosb) && S_ISREG(tosb.st_mode))
|
|
skipholes = 1;
|
|
while ((rcount = read(from_fd, buf, MAXBSIZE)) > 0) {
|
|
if (skipholes && memcmp(buf, zeroes, rcount) == 0)
|
|
wcount = lseek(to_fd, rcount, SEEK_CUR) == -1 ? -1 : rcount;
|
|
else
|
|
wcount = write(to_fd, buf, rcount);
|
|
if (rcount != wcount || wcount == -1) {
|
|
warn("%s", to.p_path);
|
|
rval = 1;
|
|
break;
|
|
}
|
|
}
|
|
if (skipholes && rcount >= 0)
|
|
rcount = ftruncate(to_fd, lseek(to_fd, 0, SEEK_CUR));
|
|
if (rcount < 0) {
|
|
warn("%s", entp->fts_path);
|
|
rval = 1;
|
|
}
|
|
}
|
|
|
|
if (rval == 1) {
|
|
(void)close(from_fd);
|
|
(void)close(to_fd);
|
|
return (1);
|
|
}
|
|
|
|
if (setfile(fs, to_fd))
|
|
rval = 1;
|
|
(void)close(from_fd);
|
|
if (close(to_fd)) {
|
|
warn("%s", to.p_path);
|
|
rval = 1;
|
|
}
|
|
return (rval);
|
|
}
|
|
|
|
static int
|
|
copy_link(FTSENT *p, int exists)
|
|
{
|
|
int len;
|
|
char linkname[PATH_MAX];
|
|
|
|
if ((len = readlink(p->fts_path, linkname, sizeof(linkname)-1)) == -1) {
|
|
warn("readlink: %s", p->fts_path);
|
|
return (1);
|
|
}
|
|
linkname[len] = '\0';
|
|
if (exists && unlink(to.p_path)) {
|
|
warn("unlink: %s", to.p_path);
|
|
return (1);
|
|
}
|
|
if (symlink(linkname, to.p_path)) {
|
|
warn("symlink: %s", linkname);
|
|
return (1);
|
|
}
|
|
return (setfile(p->fts_statp, -1));
|
|
}
|
|
|
|
static int
|
|
copy_fifo(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 (setfile(from_stat, -1));
|
|
}
|
|
|
|
static int
|
|
copy_special(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 (setfile(from_stat, -1));
|
|
}
|
|
|
|
|
|
static int
|
|
setfile(struct stat *fs, int fd)
|
|
{
|
|
struct timespec ts[2];
|
|
int rval;
|
|
|
|
rval = 0;
|
|
fs->st_mode &= S_ISTXT | S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO;
|
|
|
|
ts[0] = fs->st_atim;
|
|
ts[1] = fs->st_mtim;
|
|
if (fd >= 0 ? futimens(fd, ts) :
|
|
utimensat(AT_FDCWD, to.p_path, ts, AT_SYMLINK_NOFOLLOW)) {
|
|
warn("update times: %s", to.p_path);
|
|
rval = 1;
|
|
}
|
|
/*
|
|
* 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 (fd >= 0 ? fchown(fd, fs->st_uid, fs->st_gid) :
|
|
lchown(to.p_path, fs->st_uid, fs->st_gid)) {
|
|
if (errno != EPERM) {
|
|
warn("chown: %s", to.p_path);
|
|
rval = 1;
|
|
}
|
|
fs->st_mode &= ~(S_ISTXT | S_ISUID | S_ISGID);
|
|
}
|
|
if (fd >= 0 ? fchmod(fd, fs->st_mode) :
|
|
fchmodat(AT_FDCWD, to.p_path, fs->st_mode, AT_SYMLINK_NOFOLLOW)) {
|
|
warn("chmod: %s", to.p_path);
|
|
rval = 1;
|
|
}
|
|
|
|
#if HAVE_CHFLAGS
|
|
/*
|
|
* XXX
|
|
* NFS doesn't support chflags; ignore errors unless there's reason
|
|
* to believe we're losing bits. (Note, this still won't be right
|
|
* if the server supports flags and we were trying to *remove* flags
|
|
* on a file that we copied, i.e., that we didn't create.)
|
|
*/
|
|
errno = 0;
|
|
if (fd >= 0 ? fchflags(fd, fs->st_flags) :
|
|
chflagsat(AT_FDCWD, to.p_path, fs->st_flags, AT_SYMLINK_NOFOLLOW))
|
|
if (errno != EOPNOTSUPP || fs->st_flags != 0) {
|
|
warn("chflags: %s", to.p_path);
|
|
rval = 1;
|
|
}
|
|
#endif
|
|
return (rval);
|
|
}
|