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/* $OpenBSD: mv.c,v 1.45 2017/06/27 21:43:46 tedu Exp $ */ |
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/* $NetBSD: mv.c,v 1.9 1995/03/21 09:06:52 cgd Exp $ */ |
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/* |
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* Copyright (c) 1989, 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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* Ken Smith of The State University of New York at Buffalo. |
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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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#include <sys/time.h> |
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#include <sys/wait.h> |
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#include <sys/stat.h> |
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#include <sys/mount.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 <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 <pwd.h> |
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#include <grp.h> |
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extern char *__progname; |
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int fflg, iflg, vflg; |
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int stdin_ok; |
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extern int cpmain(int argc, char **argv); |
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extern int rmmain(int argc, char **argv); |
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int mvcopy(char *, char *); |
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int do_move(char *, char *); |
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int fastcopy(char *, char *, struct stat *); |
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void usage(void); |
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int |
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main(int argc, char *argv[]) |
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{ |
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int baselen, len, rval; |
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char *p, *endp; |
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26050 |
struct stat sb; |
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int ch; |
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13025 |
char path[PATH_MAX]; |
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✓✓ |
26080 |
while ((ch = getopt(argc, argv, "ifv")) != -1) |
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✗✓✗✗
|
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switch (ch) { |
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case 'i': |
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fflg = 0; |
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iflg = 1; |
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break; |
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case 'f': |
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iflg = 0; |
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fflg = 1; |
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break; |
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case 'v': |
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vflg = 1; |
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break; |
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default: |
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usage(); |
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} |
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13025 |
argc -= optind; |
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|
13025 |
argv += optind; |
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✗✓ |
13025 |
if (argc < 2) |
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usage(); |
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13025 |
stdin_ok = isatty(STDIN_FILENO); |
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/* |
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* If the stat on the target fails or the target isn't a directory, |
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* try the move. More than 2 arguments is an error in this case. |
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*/ |
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✓✓✓✗
|
21453 |
if (stat(argv[argc - 1], &sb) || !S_ISDIR(sb.st_mode)) { |
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✗✓ |
13025 |
if (argc > 2) |
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usage(); |
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exit(do_move(argv[0], argv[1])); |
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} |
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108 |
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/* It's a directory, move each file into it. */ |
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if (strlcpy(path, argv[argc - 1], sizeof path) >= sizeof path) |
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errx(1, "%s: destination pathname too long", *argv); |
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baselen = strlen(path); |
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endp = &path[baselen]; |
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if (*(endp - 1) != '/') { |
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*endp++ = '/'; |
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++baselen; |
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} |
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for (rval = 0; --argc; ++argv) { |
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char *current_arg = *argv; |
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/* |
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* Get the name of the file to create from |
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* the argument. This is a bit tricky because |
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* in the case of b/ we actually want b and empty |
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* string |
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*/ |
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if ((p = strrchr(current_arg, '/')) == NULL) |
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p = current_arg; |
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else { |
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/* Special case foo/ */ |
130 |
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if (!*(p+1)) { |
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while (p >= current_arg && *p == '/') |
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p--; |
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while (p >= current_arg && *p != '/') |
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p--; |
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} |
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p++; |
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} |
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if ((baselen + (len = strlen(p))) >= PATH_MAX) { |
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warnx("%s: destination pathname too long", *argv); |
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rval = 1; |
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} else { |
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memmove(endp, p, len + 1); |
146 |
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if (do_move(current_arg, path)) |
147 |
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rval = 1; |
148 |
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} |
149 |
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} |
150 |
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exit(rval); |
151 |
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} |
152 |
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153 |
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int |
154 |
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do_move(char *from, char *to) |
155 |
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{ |
156 |
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26050 |
struct stat sb, fsb; |
157 |
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13025 |
char modep[15]; |
158 |
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159 |
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/* Source path must exist (symlink is OK). */ |
160 |
✓✓ |
13025 |
if (lstat(from, &fsb)) { |
161 |
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warn("%s", from); |
162 |
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return (1); |
163 |
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} |
164 |
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165 |
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/* |
166 |
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* (1) If the destination path exists, the -f option is not specified |
167 |
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* and either of the following conditions are true: |
168 |
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* |
169 |
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* (a) The permissions of the destination path do not permit |
170 |
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* writing and the standard input is a terminal. |
171 |
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* (b) The -i option is specified. |
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* |
173 |
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* the mv utility shall write a prompt to standard error and |
174 |
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* read a line from standard input. If the response is not |
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* affirmative, mv shall do nothing more with the current |
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* source file... |
177 |
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*/ |
178 |
✓✓✓✓
|
26029 |
if (!fflg && !access(to, F_OK)) { |
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int ask = 1; |
180 |
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int ch, first; |
181 |
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182 |
✗✓✗✗
|
8427 |
if (iflg && !access(from, F_OK)) { |
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(void)fprintf(stderr, "overwrite %s? ", to); |
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✓✗✗✓ ✗✗ |
16854 |
} else if (stdin_ok && access(to, W_OK) && !stat(to, &sb)) { |
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strmode(sb.st_mode, modep); |
186 |
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(void)fprintf(stderr, "override %s%s%s/%s for %s? ", |
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modep + 1, modep[9] == ' ' ? "" : " ", |
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user_from_uid(sb.st_uid, 0), |
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group_from_gid(sb.st_gid, 0), to); |
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} else |
191 |
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ask = 0; |
192 |
✗✓ |
8427 |
if (ask) { |
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first = ch = getchar(); |
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while (ch != '\n' && ch != EOF) |
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ch = getchar(); |
196 |
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if (first != 'y' && first != 'Y') |
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return (0); |
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} |
199 |
✓✗ |
8427 |
} |
200 |
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201 |
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/* |
202 |
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* (2) If rename() succeeds, mv shall do nothing more with the |
203 |
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* current source file. If it fails for any other reason than |
204 |
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* EXDEV, mv shall write a diagnostic message to the standard |
205 |
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* error and do nothing more with the current source file. |
206 |
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* |
207 |
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* (3) If the destination path exists, and it is a file of type |
208 |
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* directory and source_file is not a file of type directory, |
209 |
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* or it is a file not of type directory, and source file is |
210 |
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* a file of type directory, mv shall write a diagnostic |
211 |
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* message to standard error, and do nothing more with the |
212 |
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* current source file... |
213 |
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*/ |
214 |
✓✗ |
13019 |
if (!rename(from, to)) { |
215 |
✗✓ |
13019 |
if (vflg) |
216 |
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(void)fprintf(stdout, "%s -> %s\n", from, to); |
217 |
|
13019 |
return (0); |
218 |
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} |
219 |
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|
220 |
|
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if (errno != EXDEV) { |
221 |
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warn("rename %s to %s", from, to); |
222 |
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return (1); |
223 |
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} |
224 |
|
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|
225 |
|
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/* Disallow moving a mount point. */ |
226 |
|
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if (S_ISDIR(fsb.st_mode)) { |
227 |
|
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struct statfs sfs; |
228 |
|
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char path[PATH_MAX]; |
229 |
|
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|
230 |
|
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if (realpath(from, path) == NULL) { |
231 |
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warnx("cannot resolve %s", from); |
232 |
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return (1); |
233 |
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} |
234 |
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if (!statfs(path, &sfs) && !strcmp(path, sfs.f_mntonname)) { |
235 |
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warnx("cannot rename a mount point"); |
236 |
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return (1); |
237 |
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} |
238 |
|
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} |
239 |
|
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|
240 |
|
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/* |
241 |
|
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* (4) If the destination path exists, mv shall attempt to remove it. |
242 |
|
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* If this fails for any reason, mv shall write a diagnostic |
243 |
|
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* message to the standard error and do nothing more with the |
244 |
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* current source file... |
245 |
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*/ |
246 |
|
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if (!lstat(to, &sb)) { |
247 |
|
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if ((S_ISDIR(sb.st_mode)) ? rmdir(to) : unlink(to)) { |
248 |
|
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warn("can't remove %s", to); |
249 |
|
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return (1); |
250 |
|
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} |
251 |
|
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} |
252 |
|
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|
253 |
|
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/* |
254 |
|
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* (5) The file hierarchy rooted in source_file shall be duplicated |
255 |
|
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* as a file hierarchy rooted in the destination path... |
256 |
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*/ |
257 |
|
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return (S_ISREG(fsb.st_mode) ? |
258 |
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fastcopy(from, to, &fsb) : mvcopy(from, to)); |
259 |
|
13025 |
} |
260 |
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|
261 |
|
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int |
262 |
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fastcopy(char *from, char *to, struct stat *sbp) |
263 |
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{ |
264 |
|
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struct timespec ts[2]; |
265 |
|
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static u_int32_t blen; |
266 |
|
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static char *bp; |
267 |
|
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int nread, from_fd, to_fd; |
268 |
|
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int badchown = 0, serrno = 0; |
269 |
|
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|
270 |
|
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if (!blen) { |
271 |
|
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blen = sbp->st_blksize; |
272 |
|
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if ((bp = malloc(blen)) == NULL) { |
273 |
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warn(NULL); |
274 |
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blen = 0; |
275 |
|
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return (1); |
276 |
|
|
} |
277 |
|
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} |
278 |
|
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|
279 |
|
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if ((from_fd = open(from, O_RDONLY, 0)) < 0) { |
280 |
|
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warn("%s", from); |
281 |
|
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return (1); |
282 |
|
|
} |
283 |
|
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if ((to_fd = open(to, O_CREAT | O_TRUNC | O_WRONLY, 0600)) < 0) { |
284 |
|
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warn("%s", to); |
285 |
|
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(void)close(from_fd); |
286 |
|
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return (1); |
287 |
|
|
} |
288 |
|
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|
289 |
|
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if (fchown(to_fd, sbp->st_uid, sbp->st_gid)) { |
290 |
|
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serrno = errno; |
291 |
|
|
badchown = 1; |
292 |
|
|
} |
293 |
|
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(void) fchmod(to_fd, sbp->st_mode & ~(S_ISUID|S_ISGID)); |
294 |
|
|
|
295 |
|
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while ((nread = read(from_fd, bp, blen)) > 0) |
296 |
|
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if (write(to_fd, bp, nread) != nread) { |
297 |
|
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warn("%s", to); |
298 |
|
|
goto err; |
299 |
|
|
} |
300 |
|
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if (nread < 0) { |
301 |
|
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warn("%s", from); |
302 |
|
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err: if (unlink(to)) |
303 |
|
|
warn("%s: remove", to); |
304 |
|
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(void)close(from_fd); |
305 |
|
|
(void)close(to_fd); |
306 |
|
|
return (1); |
307 |
|
|
} |
308 |
|
|
(void)close(from_fd); |
309 |
|
|
|
310 |
|
|
if (badchown) { |
311 |
|
|
if ((sbp->st_mode & (S_ISUID|S_ISGID))) { |
312 |
|
|
warnc(serrno, |
313 |
|
|
"%s: set owner/group; not setting setuid/setgid", |
314 |
|
|
to); |
315 |
|
|
sbp->st_mode &= ~(S_ISUID|S_ISGID); |
316 |
|
|
} else if (!fflg) |
317 |
|
|
warnc(serrno, "%s: set owner/group", to); |
318 |
|
|
} |
319 |
|
|
if (fchmod(to_fd, sbp->st_mode)) |
320 |
|
|
warn("%s: set mode", to); |
321 |
|
|
|
322 |
|
|
/* |
323 |
|
|
* XXX |
324 |
|
|
* NFS doesn't support chflags; ignore errors unless there's reason |
325 |
|
|
* to believe we're losing bits. (Note, this still won't be right |
326 |
|
|
* if the server supports flags and we were trying to *remove* flags |
327 |
|
|
* on a file that we copied, i.e., that we didn't create.) |
328 |
|
|
*/ |
329 |
|
|
errno = 0; |
330 |
|
|
if (fchflags(to_fd, sbp->st_flags)) |
331 |
|
|
if (errno != EOPNOTSUPP || sbp->st_flags != 0) |
332 |
|
|
warn("%s: set flags", to); |
333 |
|
|
|
334 |
|
|
ts[0] = sbp->st_atim; |
335 |
|
|
ts[1] = sbp->st_mtim; |
336 |
|
|
if (futimens(to_fd, ts)) |
337 |
|
|
warn("%s: set times", to); |
338 |
|
|
|
339 |
|
|
if (close(to_fd)) { |
340 |
|
|
warn("%s", to); |
341 |
|
|
return (1); |
342 |
|
|
} |
343 |
|
|
|
344 |
|
|
if (unlink(from)) { |
345 |
|
|
warn("%s: remove", from); |
346 |
|
|
return (1); |
347 |
|
|
} |
348 |
|
|
|
349 |
|
|
if (vflg) |
350 |
|
|
(void)fprintf(stdout, "%s -> %s\n", from, to); |
351 |
|
|
|
352 |
|
|
return (0); |
353 |
|
|
} |
354 |
|
|
|
355 |
|
|
int |
356 |
|
|
mvcopy(char *from, char *to) |
357 |
|
|
{ |
358 |
|
|
char *argv[3]; |
359 |
|
|
|
360 |
|
|
argv[0] = from; |
361 |
|
|
argv[1] = to; |
362 |
|
|
argv[2] = NULL; |
363 |
|
|
if (cpmain(2, argv)) { |
364 |
|
|
warn("cp failed"); |
365 |
|
|
_exit(1); |
366 |
|
|
} |
367 |
|
|
|
368 |
|
|
argv[0] = from; |
369 |
|
|
argv[1] = NULL; |
370 |
|
|
if (rmmain(1, argv)) { |
371 |
|
|
warn("rm failed"); |
372 |
|
|
_exit(1); |
373 |
|
|
} |
374 |
|
|
|
375 |
|
|
/* |
376 |
|
|
* XXX |
377 |
|
|
* The external cpmain(), rmmain() approach (to avoid |
378 |
|
|
* fork+exec) hides some of the details on what was moved. |
379 |
|
|
* This can be improved upon during a refactor. |
380 |
|
|
*/ |
381 |
|
|
if (vflg) |
382 |
|
|
(void)fprintf(stdout, "%s -> %s\n", from, to); |
383 |
|
|
|
384 |
|
|
return (0); |
385 |
|
|
} |
386 |
|
|
|
387 |
|
|
void |
388 |
|
|
usage(void) |
389 |
|
|
{ |
390 |
|
|
(void)fprintf(stderr, "usage: %s [-fiv] source target\n", __progname); |
391 |
|
|
(void)fprintf(stderr, " %s [-fiv] source ... directory\n", |
392 |
|
|
__progname); |
393 |
|
|
exit(1); |
394 |
|
|
} |