author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 02 Feb 2010 02:01:42 +0200 | |
changeset 0 | e4d67989cc36 |
permissions | -rw-r--r-- |
0
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1 |
/* |
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2 |
* Copyright (c) 1983, 1993 |
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3 |
* The Regents of the University of California. All rights reserved. |
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4 |
* |
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5 |
* 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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* 4. 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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* © * Portions Copyright (c) 2006-2008 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. |
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*/ |
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|
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#if defined(LIBC_SCCS) && !defined(lint) |
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static char sccsid[] = "@(#)scandir.c 8.3 (Berkeley) 1/2/94"; |
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#endif /* LIBC_SCCS and not lint */ |
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#include <sys/cdefs.h> |
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__FBSDID("$FreeBSD: src/lib/libc/gen/scandir.c,v 1.7 2002/02/01 01:32:19 obrien Exp $"); |
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36 |
|
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/* |
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* Scan the directory dirname calling select to make a list of selected |
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* directory entries then sort using qsort and compare routine dcomp. |
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* Returns the number of entries and a pointer to a list of pointers to |
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* struct dirent (through namelist). Returns -1 if there were any errors. |
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*/ |
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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 <dirent.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <fcntl.h> |
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|
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/* |
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* The DIRSIZ macro is the minimum record length which will hold the directory |
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* entry. This requires the amount of space in struct dirent without the |
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* d_name field, plus enough space for the name and a terminating nul byte |
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* (dp->d_namlen + 1), rounded up to a 4 byte boundary. |
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*/ |
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#undef DIRSIZ |
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#define DIRSIZ(dp) \ |
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((sizeof(struct dirent) - sizeof(dp)->d_name) + \ |
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(((dp)->d_namlen + 1 + 3) &~ 3)) |
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61 |
|
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62 |
EXPORT_C |
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int |
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64 |
scandir(dirname, namelist, select, dcomp) |
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const char *dirname; |
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struct dirent ***namelist; |
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int (*select)(struct dirent *); |
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int (*dcomp)(const void *, const void *); |
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69 |
{ |
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70 |
struct dirent *d, *p, **names = NULL; |
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71 |
size_t nitems = 0; |
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long arraysz; |
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DIR *dirp; |
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74 |
|
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75 |
if ((dirp = opendir(dirname)) == NULL) |
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return(-1); |
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/* |
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* consider the number of entries in the dir is 10, initially. |
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*/ |
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80 |
arraysz = 10; |
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names = (struct dirent **)malloc(arraysz * sizeof(struct dirent *)); |
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if (names == NULL) |
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83 |
goto fail; |
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84 |
|
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85 |
while ((d = readdir(dirp)) != NULL) { |
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86 |
if (select != NULL && !(*select)(d)) |
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87 |
continue; /* just selected names */ |
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88 |
/* |
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89 |
* Make a minimum size copy of the data |
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90 |
*/ |
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p = (struct dirent *)malloc(DIRSIZ(d)); |
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if (p == NULL) |
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93 |
goto fail; |
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94 |
p->d_fileno = d->d_fileno; |
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95 |
p->d_type = d->d_type; |
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96 |
p->d_reclen = d->d_reclen; |
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97 |
p->d_namlen = d->d_namlen; |
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98 |
bcopy(d->d_name, p->d_name, p->d_namlen + 1); |
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99 |
|
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100 |
/* |
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101 |
* Check to make sure the array has space left and |
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102 |
* realloc the maximum size. |
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103 |
*/ |
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104 |
if (nitems >= arraysz) { |
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105 |
const int inc = 10; /* increase by this much */ |
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106 |
struct dirent **names2; |
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107 |
|
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108 |
names2 = (struct dirent **)realloc((char *)names, |
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109 |
(arraysz + inc) * sizeof(struct dirent *)); |
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110 |
if (names2 == NULL) { |
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111 |
free(p); |
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112 |
goto fail; |
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113 |
} |
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114 |
names = names2; |
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115 |
arraysz += inc; |
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116 |
} |
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117 |
names[nitems++] = p; |
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118 |
} |
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119 |
closedir(dirp); |
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120 |
if (nitems && dcomp != NULL) |
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121 |
qsort(names, nitems, sizeof(struct dirent *), dcomp); |
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122 |
*namelist = names; |
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123 |
return(nitems); |
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124 |
|
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125 |
fail: |
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126 |
while (nitems > 0) |
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127 |
free(names[--nitems]); |
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128 |
free(names); |
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129 |
closedir(dirp); |
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130 |
return -1; |
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131 |
} |
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132 |
|
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133 |
/* |
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134 |
* Alphabetic order comparison routine for those who want it. |
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135 |
*/ |
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136 |
EXPORT_C |
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137 |
int |
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138 |
alphasort(d1, d2) |
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139 |
const void *d1; |
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140 |
const void *d2; |
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141 |
{ |
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142 |
return(strcmp((*(struct dirent **)d1)->d_name, |
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143 |
(*(struct dirent **)d2)->d_name)); |
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144 |
} |