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<hr><h1>build/myftw.c</h1><a href="myftw_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001
00006 <span class="comment">/* Copyright (C) 1992, 1994, 1995 Free Software Foundation, Inc.</span>
00007 <span class="comment">This file is part of the GNU C Library.</span>
00008 <span class="comment">Contributed by Ian Lance Taylor (ian@airs.com).</span>
00009 <span class="comment"></span>
00010 <span class="comment">The GNU C Library is free software; you can redistribute it and/or</span>
00011 <span class="comment">modify it under the terms of the GNU Library General Public License as</span>
00012 <span class="comment">published by the Free Software Foundation; either version 2 of the</span>
00013 <span class="comment">License, or (at your option) any later version.</span>
00014 <span class="comment"></span>
00015 <span class="comment">The GNU C Library is distributed in the hope that it will be useful,</span>
00016 <span class="comment">but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
00017 <span class="comment">MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span>
00018 <span class="comment">Library General Public License for more details.</span>
00019 <span class="comment"></span>
00020 <span class="comment">You should have received a copy of the GNU Library General Public</span>
00021 <span class="comment">License along with the GNU C Library; see the file COPYING.LIB. If</span>
00022 <span class="comment">not, write to the Free Software Foundation, Inc., 675 Mass Ave,</span>
00023 <span class="comment">Cambridge, MA 02139, USA. */</span>
00024
00025 <span class="preprocessor">#include "<a class="code" href="system_8h.html">system.h</a>"</span>
00026
00027 <span class="preprocessor">#include <<a class="code" href="rpmio_8h.html">rpmio.h</a>></span>
00028
00029 <span class="preprocessor">#ifndef NAMLEN</span>
<a name="l00030"></a><a class="code" href="myftw_8c.html#a0">00030</a> <span class="preprocessor"></span><span class="preprocessor">#define NAMLEN(a) strlen((a)->d_name)</span>
00031 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
00032 <span class="preprocessor"></span>
00033 <span class="preprocessor">#if !defined(__LCLINT__)</span>
00034 <span class="preprocessor"></span><span class="preprocessor">#ifndef PATH_MAX</span>
00035 <span class="preprocessor"></span><span class="preprocessor">#ifdef _POSIX_VERSION</span>
00036 <span class="preprocessor"></span><span class="preprocessor">#define PATH_MAX _POSIX_PATH_MAX</span>
00037 <span class="preprocessor"></span><span class="preprocessor">#else</span>
00038 <span class="preprocessor"></span><span class="preprocessor">#ifdef MAXPATHLEN</span>
00039 <span class="preprocessor"></span><span class="preprocessor">#define PATH_MAX MAXPATHLEN</span>
00040 <span class="preprocessor"></span><span class="preprocessor">#else</span>
<a name="l00041"></a><a class="code" href="myftw_8c.html#a1">00041</a> <span class="preprocessor"></span><span class="preprocessor">#define PATH_MAX 1024</span>
00042 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
00043 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
00044 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
00045 <span class="preprocessor"></span><span class="preprocessor">#endif </span><span class="comment">/* !__LCLINT */</span>
00046
00047 <span class="preprocessor">#include "<a class="code" href="myftw_8h.html">myftw.h</a>"</span>
00048 <span class="preprocessor">#include "<a class="code" href="debug_8h.html">debug.h</a>"</span>
00049
00050 <span class="comment">/* Traverse one level of a directory tree. */</span>
00051
00054 <span class="comment">/*@-nullstate@*/</span>
00055 <span class="keyword">static</span> <span class="keywordtype">int</span>
<a name="l00056"></a><a class="code" href="myftw_8c.html#a2">00056</a> <a class="code" href="myftw_8c.html#a2">myftw_dir</a> (DIR **dirs, <span class="keywordtype">int</span> level, <span class="keywordtype">int</span> descriptors,
00057 <span class="keywordtype">char</span> *dir, size_t len,
00058 <a class="code" href="myftw_8h.html#a4">myftwFunc</a> func,
00059 <span class="keywordtype">void</span> *fl)
00060 <span class="comment">/*@globals errno, fileSystem @*/</span>
00061 <span class="comment">/*@modifies *dirs, *dir, errno, fileSystem @*/</span>
00062 {
00063 <span class="keywordtype">int</span> got;
00064 <span class="keyword">struct </span><a class="code" href="system_8h.html#a11">dirent</a> *entry;
00065 <span class="keywordtype">int</span> d_namlen;
00066
00067 got = 0;
00068
00069 <a class="code" href="system_8h.html#a29">errno</a> = 0;
00070
00071 <span class="keywordflow">while</span> ((entry = <a class="code" href="rpmrpc_8c.html#a52">Readdir</a> (dirs[level])) != NULL)
00072 {
00073 <span class="keyword">struct </span>stat s;
00074 <span class="keywordtype">int</span> flag, retval, newlev = 0;
00075
00076 ++got;
00077
00078 <span class="keywordflow">if</span> (entry->d_name[0] == <span class="charliteral">'.'</span>
00079 && (entry->d_name [1] == <span class="charliteral">'\0'</span> ||
00080 (entry->d_name [2] == <span class="charliteral">'\0'</span> && entry->d_name[1] == <span class="charliteral">'.'</span>)))
00081 {
00082 <a class="code" href="system_8h.html#a29">errno</a> = 0;
00083 <span class="keywordflow">continue</span>;
00084 }
00085
00086 d_namlen = <a class="code" href="myftw_8c.html#a0">NAMLEN</a>(entry) + 1;
00087 <span class="keywordflow">if</span> (d_namlen + len > <a class="code" href="myftw_8c.html#a1">PATH_MAX</a>)
00088 {
00089 <span class="preprocessor">#ifdef ENAMETOOLONG</span>
00090 <span class="preprocessor"></span> <a class="code" href="system_8h.html#a29">errno</a> = ENAMETOOLONG;
00091 <span class="preprocessor">#else</span>
00092 <span class="preprocessor"></span> <a class="code" href="system_8h.html#a29">errno</a> = ENOMEM;
00093 <span class="preprocessor">#endif</span>
00094 <span class="preprocessor"></span> <span class="keywordflow">return</span> -1;
00095 }
00096
00097 dir[len] = <span class="charliteral">'/'</span>;
00098 memcpy ((<span class="keywordtype">void</span> *) (dir + len + 1), (<span class="keywordtype">void</span> *) entry->d_name, d_namlen);
00099
00100 <span class="keywordflow">if</span> (<a class="code" href="rpmrpc_8c.html#a46">Lstat</a> (dir, &s) < 0)
00101 {
00102 <span class="comment">/* Following POSIX.1 2.4 ENOENT is returned if the file cannot</span>
00103 <span class="comment"> * be stat'ed. This can happen for a file returned by Readdir</span>
00104 <span class="comment"> * if it's an unresolved symbolic link. This should be regarded</span>
00105 <span class="comment"> * as an forgivable error. -- Uli. */</span>
00106 <span class="keywordflow">if</span> (<a class="code" href="system_8h.html#a29">errno</a> != EACCES && <a class="code" href="system_8h.html#a29">errno</a> != ENOENT)
00107 <span class="keywordflow">return</span> -1;
00108 flag = <a class="code" href="myftw_8h.html#a3">MYFTW_NS</a>;
00109 }
00110 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (S_ISDIR (s.st_mode))
00111 {
00112 newlev = (level + 1) % descriptors;
00113
00114 <span class="comment">/*@-unqualifiedtrans@*/</span>
00115 <span class="keywordflow">if</span> (dirs[newlev] != NULL)
00116 (void) <a class="code" href="rpmrpc_8c.html#a53">Closedir</a> (dirs[newlev]);
00117 <span class="comment">/*@=unqualifiedtrans@*/</span>
00118
00119 dirs[newlev] = <a class="code" href="rpmrpc_8c.html#a51">Opendir</a> (dir);
00120 <span class="keywordflow">if</span> (dirs[newlev] != NULL)
00121 flag = <a class="code" href="myftw_8h.html#a1">MYFTW_D</a>;
00122 <span class="keywordflow">else</span>
00123 {
00124 <span class="keywordflow">if</span> (<a class="code" href="system_8h.html#a29">errno</a> != EACCES)
00125 <span class="keywordflow">return</span> -1;
00126 flag = <a class="code" href="myftw_8h.html#a2">MYFTW_DNR</a>;
00127 }
00128 }
00129 <span class="keywordflow">else</span>
00130 flag = <a class="code" href="myftw_8h.html#a0">MYFTW_F</a>;
00131
00132 retval = (*func) (fl, dir, &s);
00133
00134 <span class="keywordflow">if</span> (flag == <a class="code" href="myftw_8h.html#a1">MYFTW_D</a>)
00135 {
00136 <span class="keywordflow">if</span> (retval == 0)
00137 retval = <a class="code" href="myftw_8c.html#a2">myftw_dir</a> (dirs, newlev, descriptors, dir,
00138 d_namlen + len, func, fl);
00139 <span class="keywordflow">if</span> (dirs[newlev] != NULL)
00140 {
00141 <span class="keywordtype">int</span> save;
00142
00143 save = <a class="code" href="system_8h.html#a29">errno</a>;
00144 (void) <a class="code" href="rpmrpc_8c.html#a53">Closedir</a> (dirs[newlev]);
00145 <a class="code" href="system_8h.html#a29">errno</a> = save;
00146 dirs[newlev] = NULL;
00147 }
00148 }
00149
00150 <span class="keywordflow">if</span> (retval != 0)
00151 <span class="keywordflow">return</span> retval;
00152
00153 <span class="keywordflow">if</span> (dirs[level] == NULL)
00154 {
00155 <span class="keywordtype">int</span> skip;
00156
00157 dir[len] = <span class="charliteral">'\0'</span>;
00158 dirs[level] = <a class="code" href="rpmrpc_8c.html#a51">Opendir</a> (dir);
00159 <span class="keywordflow">if</span> (dirs[level] == NULL)
00160 <span class="keywordflow">return</span> -1;
00161 skip = got;
00162 <span class="keywordflow">while</span> (skip-- != 0)
00163 {
00164 <a class="code" href="system_8h.html#a29">errno</a> = 0;
00165 <span class="keywordflow">if</span> (<a class="code" href="rpmrpc_8c.html#a52">Readdir</a> (dirs[level]) == NULL)
00166 <span class="keywordflow">return</span> <a class="code" href="system_8h.html#a29">errno</a> == 0 ? 0 : -1;
00167 }
00168 }
00169
00170 <a class="code" href="system_8h.html#a29">errno</a> = 0;
00171 }
00172
00173 <span class="keywordflow">return</span> <a class="code" href="system_8h.html#a29">errno</a> == 0 ? 0 : -1;
00174 }
00175 <span class="comment">/*@=nullstate@*/</span>
00176
00177 <span class="comment">/* Call a function on every element in a directory tree. */</span>
00178
<a name="l00179"></a><a class="code" href="myftw_8c.html#a3">00179</a> <span class="keywordtype">int</span> <a class="code" href="myftw_8c.html#a3">myftw</a> (<span class="keyword">const</span> <span class="keywordtype">char</span> *dir,
00180 <span class="keywordtype">int</span> descriptors,
00181 <a class="code" href="myftw_8h.html#a4">myftwFunc</a> func,
00182 <span class="keywordtype">void</span> *fl)
00183 {
00184 DIR **dirs;
00185 size_t len;
00186 <span class="keywordtype">char</span> buf[<a class="code" href="myftw_8c.html#a1">PATH_MAX</a> + 1];
00187 <span class="keyword">struct </span>stat s;
00188 <span class="keywordtype">int</span> flag, retval;
00189 <span class="keywordtype">int</span> i;
00190
00191 <span class="keywordflow">if</span> (descriptors <= 0)
00192 descriptors = 1;
00193
00194 <span class="comment">/*@access DIR@*/</span>
00195 dirs = (DIR **) <a class="code" href="system_8h.html#a36">alloca</a> (descriptors * <span class="keyword">sizeof</span> (*dirs));
00196 i = descriptors;
00197 <span class="keywordflow">while</span> (i-- > 0)
00198 dirs[i] = NULL;
00199
00200 <span class="keywordflow">if</span> (<a class="code" href="rpmrpc_8c.html#a46">Lstat</a> (dir, &s) < 0)
00201 {
00202 <span class="comment">/* Following POSIX.1 2.4 ENOENT is returned if the file cannot</span>
00203 <span class="comment"> * be stat'ed. This can happen for a file returned by Readdir</span>
00204 <span class="comment"> * if it's an unresolved symbolic link. This should be regarded</span>
00205 <span class="comment"> * as an forgivable error. -- Uli. */</span>
00206 <span class="keywordflow">if</span> (<a class="code" href="system_8h.html#a29">errno</a> != EACCES && <a class="code" href="system_8h.html#a29">errno</a> != ENOENT)
00207 <span class="keywordflow">return</span> -1;
00208 flag = <a class="code" href="myftw_8h.html#a3">MYFTW_NS</a>;
00209 }
00210 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (S_ISDIR (s.st_mode))
00211 {
00212 dirs[0] = <a class="code" href="rpmrpc_8c.html#a51">Opendir</a> (dir);
00213 <span class="keywordflow">if</span> (dirs[0] != NULL)
00214 flag = <a class="code" href="myftw_8h.html#a1">MYFTW_D</a>;
00215 <span class="keywordflow">else</span>
00216 {
00217 <span class="keywordflow">if</span> (<a class="code" href="system_8h.html#a29">errno</a> != EACCES)
00218 <span class="keywordflow">return</span> -1;
00219 flag = <a class="code" href="myftw_8h.html#a2">MYFTW_DNR</a>;
00220 }
00221 }
00222 <span class="keywordflow">else</span>
00223 flag = <a class="code" href="myftw_8h.html#a0">MYFTW_F</a>;
00224
00225 len = strlen (dir);
00226 memcpy ((<span class="keywordtype">void</span> *) buf, (<span class="keywordtype">void</span> *) dir, len + 1);
00227
00228 retval = (*func) (fl, buf, &s);
00229
00230 <span class="keywordflow">if</span> (flag == <a class="code" href="myftw_8h.html#a1">MYFTW_D</a>)
00231 {
00232 <span class="keywordflow">if</span> (retval == 0)
00233 retval = <a class="code" href="myftw_8c.html#a2">myftw_dir</a> (dirs, 0, descriptors, buf, len, func, fl);
00234 <span class="keywordflow">if</span> (dirs[0] != NULL)
00235 {
00236 <span class="keywordtype">int</span> save;
00237
00238 save = <a class="code" href="system_8h.html#a29">errno</a>;
00239 (void) <a class="code" href="rpmrpc_8c.html#a53">Closedir</a> (dirs[0]);
00240 <span class="comment">/*@-mods@*/</span>
00241 <a class="code" href="system_8h.html#a29">errno</a> = save;
00242 <span class="comment">/*@=mods@*/</span>
00243 }
00244 }
00245
00246 <span class="keywordflow">return</span> retval;
00247 }
</pre></div><hr><address style="align: right;"><small>Generated on Thu Sep 12 22:14:55 2002 for rpm by
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