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annotate lib/savedir.c @ 15727:144db791c6fa

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Ensure EBADF returns for socket functions on mingw. * lib/accept.c (rpl_accept): Fail with error EBADF if the file descriptor is invalid. * lib/bind.c (rpl_bind): Likewise. * lib/connect.c (rpl_connect): Likewise. * lib/getpeername.c (rpl_getpeername): Likewise. * lib/getsockname.c (rpl_getsockname): Likewise. * lib/getsockopt.c (rpl_getsockopt): Likewise. * lib/listen.c (rpl_listen): Likewise. * lib/recv.c (rpl_recv): Likewise. * lib/recvfrom.c (rpl_recvfrom): Likewise. * lib/send.c (rpl_send): Likewise. * lib/sendto.c (rpl_sendto): Likewise. * lib/setsockopt.c (rpl_setsockopt): Likewise. * lib/shutdown.c (rpl_shutdown): Likewise.
author Bruno Haible <bruno@clisp.org>
date Wed, 21 Sep 2011 00:20:59 +0200
parents 97fc9a21a8fb
children 8250f2777afc
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1 /* savedir.c -- save the list of files in a directory in a string
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2
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3 Copyright (C) 1990, 1997-2001, 2003-2006, 2009-2011 Free Software
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4 Foundation, Inc.
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6 This program is free software: you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 3 of the License, or
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9 (at your option) any later version.
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11 This program is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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16 You should have received a copy of the GNU General Public License
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17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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18
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19 /* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */
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20
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21 #include <config.h>
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22
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23 #include "savedir.h"
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24
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25 #include <sys/types.h>
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27 #include <errno.h>
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28
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29 #include "dirent--.h"
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30 #ifndef _D_EXACT_NAMLEN
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31 # define _D_EXACT_NAMLEN(dp) strlen ((dp)->d_name)
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32 #endif
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33
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34 #include <stddef.h>
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35 #include <stdlib.h>
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36 #include <string.h>
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38 #include "xalloc.h"
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39
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40 #ifndef NAME_SIZE_DEFAULT
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41 # define NAME_SIZE_DEFAULT 512
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42 #endif
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43
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44 /* Return a freshly allocated string containing the file names
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45 in directory DIRP, separated by '\0' characters;
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46 the end is marked by two '\0' characters in a row.
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47 Return NULL (setting errno) if DIRP cannot be read.
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48 If DIRP is NULL, return NULL without affecting errno. */
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49
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50 char *
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51 streamsavedir (DIR *dirp)
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52 {
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53 char *name_space;
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54 size_t allocated = NAME_SIZE_DEFAULT;
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55 size_t used = 0;
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56 int save_errno;
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57
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58 if (dirp == NULL)
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59 return NULL;
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60
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61 name_space = xmalloc (allocated);
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62
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63 for (;;)
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64 {
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65 struct dirent const *dp;
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66 char const *entry;
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67
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68 errno = 0;
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69 dp = readdir (dirp);
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70 if (! dp)
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71 break;
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72
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73 /* Skip "", ".", and "..". "" is returned by at least one buggy
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74 implementation: Solaris 2.4 readdir on NFS file systems. */
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75 entry = dp->d_name;
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76 if (entry[entry[0] != '.' ? 0 : entry[1] != '.' ? 1 : 2] != '\0')
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77 {
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78 size_t entry_size = _D_EXACT_NAMLEN (dp) + 1;
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79 if (used + entry_size < used)
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80 xalloc_die ();
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81 if (allocated <= used + entry_size)
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82 {
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83 do
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84 {
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85 if (2 * allocated < allocated)
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86 xalloc_die ();
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87 allocated *= 2;
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88 }
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89 while (allocated <= used + entry_size);
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90
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91 name_space = xrealloc (name_space, allocated);
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92 }
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93 memcpy (name_space + used, entry, entry_size);
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94 used += entry_size;
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95 }
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96 }
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97 name_space[used] = '\0';
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98 save_errno = errno;
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99 if (save_errno != 0)
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100 {
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101 free (name_space);
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102 errno = save_errno;
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103 return NULL;
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104 }
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105 return name_space;
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106 }
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107
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108 /* Like savedirstreamp (DIRP), except also close DIRP. */
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109
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110 static char *
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111 savedirstream (DIR *dirp)
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112 {
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113 char *name_space = streamsavedir (dirp);
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114 if (dirp && closedir (dirp) != 0)
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115 {
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116 int save_errno = errno;
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117 free (name_space);
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118 errno = save_errno;
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119 return NULL;
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120 }
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121 return name_space;
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122 }
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123
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124 /* Return a freshly allocated string containing the file names
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125 in directory DIR, separated by '\0' characters;
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126 the end is marked by two '\0' characters in a row.
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127 Return NULL (setting errno) if DIR cannot be opened, read, or closed. */
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128
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129 char *
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130 savedir (char const *dir)
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131 {
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132 return savedirstream (opendir (dir));
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133 }
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134
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135 /* Return a freshly allocated string containing the file names
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136 in directory FD, separated by '\0' characters;
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137 the end is marked by two '\0' characters in a row.
eaa31dc34937 * modules/savedir (Depends-on): Add openat.
Paul Eggert <eggert@cs.ucla.edu>
parents: 6437
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138 Return NULL (setting errno) if FD cannot be read or closed. */
eaa31dc34937 * modules/savedir (Depends-on): Add openat.
Paul Eggert <eggert@cs.ucla.edu>
parents: 6437
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139
13670
a930c356f503 savedir: add streamsavedir, deprecate fdsavedir
Paul Eggert <eggert@cs.ucla.edu>
parents: 12559
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140 /* deprecated */
6458
eaa31dc34937 * modules/savedir (Depends-on): Add openat.
Paul Eggert <eggert@cs.ucla.edu>
parents: 6437
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141 char *
eaa31dc34937 * modules/savedir (Depends-on): Add openat.
Paul Eggert <eggert@cs.ucla.edu>
parents: 6437
diff changeset
142 fdsavedir (int fd)
eaa31dc34937 * modules/savedir (Depends-on): Add openat.
Paul Eggert <eggert@cs.ucla.edu>
parents: 6437
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143 {
eaa31dc34937 * modules/savedir (Depends-on): Add openat.
Paul Eggert <eggert@cs.ucla.edu>
parents: 6437
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144 return savedirstream (fdopendir (fd));
eaa31dc34937 * modules/savedir (Depends-on): Add openat.
Paul Eggert <eggert@cs.ucla.edu>
parents: 6437
diff changeset
145 }