annotate lib/copy-file.c @ 18065:fd4663ad7454

time_rz: port to Solaris etc. Works around a tzname problem on platforms like Solaris that have tzname but not tm_zone, by setting tzname at the appropriate time and restoring it later. * lib/time_rz.c (tzname_address, tzname_value) [HAVE_TZNAME]: New static vars. (save_abbr) [HAVE_TZNAME]: Set them. (revert_tz) [HAVE_TZNAME]: Clear or use them. (restore_tzname): New function. (localtime_rz, mktime_z): Use it.
author Paul Eggert <eggert@cs.ucla.edu>
date Sat, 25 Jul 2015 15:20:10 -0700
parents ab58d4870664
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /* Copying of files.
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Paul Eggert <eggert@cs.ucla.edu>
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2 Copyright (C) 2001-2003, 2006-2007, 2009-2015 Free Software Foundation, Inc.
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3 Written by Bruno Haible <haible@clisp.cons.org>, 2001.
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4
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bbbbbf4cd1c5 Change copyright notice from GPLv2+ to GPLv3+.
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5 This program is free software: you can redistribute it and/or modify
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6 it under the terms of the GNU General Public License as published by
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7 the Free Software Foundation; either version 3 of the License, or
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8 (at your option) any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU General Public License for more details.
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14
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15 You should have received a copy of the GNU General Public License
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bbbbbf4cd1c5 Change copyright notice from GPLv2+ to GPLv3+.
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16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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17
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18
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1c4ed7637c24 Include <config.h> unconditionally.
Bruno Haible <bruno@clisp.org>
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19 #include <config.h>
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20
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21 /* Specification. */
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22 #include "copy-file.h"
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23
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24 #include <errno.h>
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25 #include <fcntl.h>
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17ce7ef2789c Include <stddef.h>, for size_t.
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26 #include <stddef.h>
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27 #include <stdlib.h>
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28 #include <sys/stat.h>
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1b0092424a44 Include <unistd.h> unconditionally.
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29 #include <unistd.h>
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30
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31 #if HAVE_UTIME || HAVE_UTIMES
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32 # if HAVE_UTIME_H
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33 # include <utime.h>
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34 # else
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35 # include <sys/utime.h>
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36 # endif
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37 #endif
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38
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39 #include "error.h"
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8c32877a40e6 copy-file, rpmatch: fix problems found by cppcheck
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40 #include "ignore-value.h"
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41 #include "safe-read.h"
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42 #include "full-write.h"
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43 #include "acl.h"
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44 #include "binary-io.h"
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a9b070c205b2 copy-file: Refactor.
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45 #include "quote.h"
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46 #include "gettext.h"
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e8fbc5424b99 digests, copy-file: increase the IO buffer size from 4KiB to 32KiB
Pádraig Brady <P@draigBrady.com>
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47 #include "xalloc.h"
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48
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49 #define _(str) gettext (str)
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50
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e8fbc5424b99 digests, copy-file: increase the IO buffer size from 4KiB to 32KiB
Pádraig Brady <P@draigBrady.com>
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51 enum { IO_SIZE = 32 * 1024 };
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cb2590895141 New module 'fchdir'.
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52
16273
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
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53 int
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
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54 qcopy_file_preserving (const char *src_filename, const char *dest_filename)
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f9ad295c45bb New module copy-file.
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55 {
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d50152d6b5d2 copy-file: add error-code-returning variant.
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56 int err = 0;
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f9ad295c45bb New module copy-file.
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57 int src_fd;
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58 struct stat statbuf;
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59 int mode;
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60 int dest_fd;
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e8fbc5424b99 digests, copy-file: increase the IO buffer size from 4KiB to 32KiB
Pádraig Brady <P@draigBrady.com>
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61 char *buf = xmalloc (IO_SIZE);
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f9ad295c45bb New module copy-file.
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62
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63 src_fd = open (src_filename, O_RDONLY | O_BINARY);
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d50152d6b5d2 copy-file: add error-code-returning variant.
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64 if (src_fd < 0)
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65 {
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66 err = GL_COPY_ERR_OPEN_READ;
d50152d6b5d2 copy-file: add error-code-returning variant.
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67 goto error;
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68 }
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69 if (fstat (src_fd, &statbuf) < 0)
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70 {
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71 err = GL_COPY_ERR_OPEN_READ;
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
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72 goto error_src;
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
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73 }
4266
f9ad295c45bb New module copy-file.
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74
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75 mode = statbuf.st_mode & 07777;
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76
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Bruno Haible <bruno@clisp.org>
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77 dest_fd = open (dest_filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0600);
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78 if (dest_fd < 0)
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d50152d6b5d2 copy-file: add error-code-returning variant.
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79 {
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
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80 err = GL_COPY_ERR_OPEN_BACKUP_WRITE;
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
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81 goto error_src;
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Reuben Thomas <rrt@sc3d.org>
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82 }
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83
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84 /* Copy the file contents. */
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85 for (;;)
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86 {
12198
e8fbc5424b99 digests, copy-file: increase the IO buffer size from 4KiB to 32KiB
Pádraig Brady <P@draigBrady.com>
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diff changeset
87 size_t n_read = safe_read (src_fd, buf, IO_SIZE);
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88 if (n_read == SAFE_READ_ERROR)
16273
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Reuben Thomas <rrt@sc3d.org>
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89 {
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Reuben Thomas <rrt@sc3d.org>
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90 err = GL_COPY_ERR_READ;
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Reuben Thomas <rrt@sc3d.org>
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91 goto error_src_dest;
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
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92 }
4266
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Bruno Haible <bruno@clisp.org>
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93 if (n_read == 0)
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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94 break;
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f9ad295c45bb New module copy-file.
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95
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96 if (full_write (dest_fd, buf, n_read) < n_read)
16273
d50152d6b5d2 copy-file: add error-code-returning variant.
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97 {
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98 err = GL_COPY_ERR_WRITE;
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99 goto error_src_dest;
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100 }
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101 }
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102
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e8fbc5424b99 digests, copy-file: increase the IO buffer size from 4KiB to 32KiB
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103 free (buf);
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104
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4a26effdff28 Preserve ACLs while copying.
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105 #if !USE_ACL
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106 if (close (dest_fd) < 0)
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107 {
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108 err = GL_COPY_ERR_WRITE;
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109 goto error_src;
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Reuben Thomas <rrt@sc3d.org>
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110 }
4266
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111 if (close (src_fd) < 0)
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112 {
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113 err = GL_COPY_ERR_AFTER_READ;
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Reuben Thomas <rrt@sc3d.org>
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114 goto error;
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115 }
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4a26effdff28 Preserve ACLs while copying.
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116 #endif
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117
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118 /* Preserve the access and modification times. */
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119 #if HAVE_UTIME
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120 {
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121 struct utimbuf ut;
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122
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123 ut.actime = statbuf.st_atime;
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124 ut.modtime = statbuf.st_mtime;
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125 utime (dest_filename, &ut);
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126 }
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127 #elif HAVE_UTIMES
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128 {
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129 struct timeval ut[2];
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130
f9ad295c45bb New module copy-file.
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131 ut[0].tv_sec = statbuf.st_atime; ut[0].tv_usec = 0;
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parents:
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132 ut[1].tv_sec = statbuf.st_mtime; ut[1].tv_usec = 0;
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parents:
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133 utimes (dest_filename, &ut);
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134 }
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135 #endif
f9ad295c45bb New module copy-file.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
136
4268
4933582b32c1 Portability to Woe32.
Bruno Haible <bruno@clisp.org>
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137 #if HAVE_CHOWN
4266
f9ad295c45bb New module copy-file.
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parents:
diff changeset
138 /* Preserve the owner and group. */
17372
8c32877a40e6 copy-file, rpmatch: fix problems found by cppcheck
Paul Eggert <eggert@cs.ucla.edu>
parents: 17249
diff changeset
139 ignore_value (chown (dest_filename, statbuf.st_uid, statbuf.st_gid));
4268
4933582b32c1 Portability to Woe32.
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140 #endif
4266
f9ad295c45bb New module copy-file.
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parents:
diff changeset
141
f9ad295c45bb New module copy-file.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
142 /* Preserve the access permissions. */
7742
4a26effdff28 Preserve ACLs while copying.
Bruno Haible <bruno@clisp.org>
parents: 7304
diff changeset
143 #if USE_ACL
16271
a9b070c205b2 copy-file: Refactor.
Bruno Haible <bruno@clisp.org>
parents: 16201
diff changeset
144 switch (qcopy_acl (src_filename, src_fd, dest_filename, dest_fd, mode))
a9b070c205b2 copy-file: Refactor.
Bruno Haible <bruno@clisp.org>
parents: 16201
diff changeset
145 {
a9b070c205b2 copy-file: Refactor.
Bruno Haible <bruno@clisp.org>
parents: 16201
diff changeset
146 case -2:
16273
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
147 err = GL_COPY_ERR_GET_ACL;
d50152d6b5d2 copy-file: add error-code-returning variant.
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parents: 16272
diff changeset
148 goto error_src_dest;
16271
a9b070c205b2 copy-file: Refactor.
Bruno Haible <bruno@clisp.org>
parents: 16201
diff changeset
149 case -1:
16273
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
150 err = GL_COPY_ERR_SET_ACL;
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
151 goto error_src_dest;
16271
a9b070c205b2 copy-file: Refactor.
Bruno Haible <bruno@clisp.org>
parents: 16201
diff changeset
152 }
7742
4a26effdff28 Preserve ACLs while copying.
Bruno Haible <bruno@clisp.org>
parents: 7304
diff changeset
153 #else
4266
f9ad295c45bb New module copy-file.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
154 chmod (dest_filename, mode);
7742
4a26effdff28 Preserve ACLs while copying.
Bruno Haible <bruno@clisp.org>
parents: 7304
diff changeset
155 #endif
4a26effdff28 Preserve ACLs while copying.
Bruno Haible <bruno@clisp.org>
parents: 7304
diff changeset
156
4a26effdff28 Preserve ACLs while copying.
Bruno Haible <bruno@clisp.org>
parents: 7304
diff changeset
157 #if USE_ACL
4a26effdff28 Preserve ACLs while copying.
Bruno Haible <bruno@clisp.org>
parents: 7304
diff changeset
158 if (close (dest_fd) < 0)
16273
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
159 {
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
160 err = GL_COPY_ERR_WRITE;
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
161 goto error_src;
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
162 }
7742
4a26effdff28 Preserve ACLs while copying.
Bruno Haible <bruno@clisp.org>
parents: 7304
diff changeset
163 if (close (src_fd) < 0)
16273
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
164 {
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
165 err = GL_COPY_ERR_AFTER_READ;
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
166 goto error;
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
167 }
7742
4a26effdff28 Preserve ACLs while copying.
Bruno Haible <bruno@clisp.org>
parents: 7304
diff changeset
168 #endif
16273
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
169
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
170 return 0;
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
171
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
172 error_src_dest:
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
173 close (dest_fd);
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
174 error_src:
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
175 close (src_fd);
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
176 error:
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
177 return err;
4266
f9ad295c45bb New module copy-file.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
178 }
16273
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
179
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
180 void
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
181 copy_file_preserving (const char *src_filename, const char *dest_filename)
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
182 {
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
183 switch (qcopy_file_preserving (src_filename, dest_filename))
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
184 {
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
185 case 0:
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
186 return;
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
187
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
188 case GL_COPY_ERR_OPEN_READ:
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
189 error (EXIT_FAILURE, errno, _("error while opening %s for reading"),
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
190 quote (src_filename));
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
191
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
192 case GL_COPY_ERR_OPEN_BACKUP_WRITE:
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
193 error (EXIT_FAILURE, errno, _("cannot open backup file %s for writing"),
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
194 quote (dest_filename));
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
195
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
196 case GL_COPY_ERR_READ:
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
197 error (EXIT_FAILURE, errno, _("error reading %s"),
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
198 quote (src_filename));
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
199
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
200 case GL_COPY_ERR_WRITE:
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
201 error (EXIT_FAILURE, errno, _("error writing %s"),
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
202 quote (dest_filename));
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
203
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
204 case GL_COPY_ERR_AFTER_READ:
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
205 error (EXIT_FAILURE, errno, _("error after reading %s"),
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
206 quote (src_filename));
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
207
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
208 case GL_COPY_ERR_GET_ACL:
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
209 error (EXIT_FAILURE, errno, "%s", quote (src_filename));
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
210
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
211 case GL_COPY_ERR_SET_ACL:
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
212 error (EXIT_FAILURE, errno, _("preserving permissions for %s"),
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
213 quote (dest_filename));
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
214
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
215 default:
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
216 abort ();
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
217 }
d50152d6b5d2 copy-file: add error-code-returning variant.
Reuben Thomas <rrt@sc3d.org>
parents: 16272
diff changeset
218 }