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 <span id="projectnumber">1.8.20</span>
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<div class="title">sd-daemon.c</div> </div>
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<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/</span>
<a name="l00002"></a>00002
<a name="l00003"></a>00003 <span class="comment">/***</span>
<a name="l00004"></a>00004 <span class="comment"> Copyright 2010 Lennart Poettering</span>
<a name="l00005"></a>00005 <span class="comment"></span>
<a name="l00006"></a>00006 <span class="comment"> Permission is hereby granted, free of charge, to any person</span>
<a name="l00007"></a>00007 <span class="comment"> obtaining a copy of this software and associated documentation files</span>
<a name="l00008"></a>00008 <span class="comment"> (the "Software"), to deal in the Software without restriction,</span>
<a name="l00009"></a>00009 <span class="comment"> including without limitation the rights to use, copy, modify, merge,</span>
<a name="l00010"></a>00010 <span class="comment"> publish, distribute, sublicense, and/or sell copies of the Software,</span>
<a name="l00011"></a>00011 <span class="comment"> and to permit persons to whom the Software is furnished to do so,</span>
<a name="l00012"></a>00012 <span class="comment"> subject to the following conditions:</span>
<a name="l00013"></a>00013 <span class="comment"></span>
<a name="l00014"></a>00014 <span class="comment"> The above copyright notice and this permission notice shall be</span>
<a name="l00015"></a>00015 <span class="comment"> included in all copies or substantial portions of the Software.</span>
<a name="l00016"></a>00016 <span class="comment"></span>
<a name="l00017"></a>00017 <span class="comment"> THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,</span>
<a name="l00018"></a>00018 <span class="comment"> EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF</span>
<a name="l00019"></a>00019 <span class="comment"> MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND</span>
<a name="l00020"></a>00020 <span class="comment"> NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS</span>
<a name="l00021"></a>00021 <span class="comment"> BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN</span>
<a name="l00022"></a>00022 <span class="comment"> ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN</span>
<a name="l00023"></a>00023 <span class="comment"> CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE</span>
<a name="l00024"></a>00024 <span class="comment"> SOFTWARE.</span>
<a name="l00025"></a>00025 <span class="comment">***/</span>
<a name="l00026"></a>00026
<a name="l00027"></a>00027 <span class="preprocessor">#define __EXTENSIONS__</span>
<a name="l00028"></a>00028 <span class="preprocessor"></span>
<a name="l00029"></a>00029 <span class="preprocessor">#ifndef _GNU_SOURCE</span>
<a name="l00030"></a>00030 <span class="preprocessor"></span><span class="preprocessor"># define _GNU_SOURCE</span>
<a name="l00031"></a>00031 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00032"></a>00032 <span class="preprocessor"></span>
<a name="l00033"></a>00033 <span class="preprocessor">#include <sys/types.h></span>
<a name="l00034"></a>00034 <span class="preprocessor">#include <sys/stat.h></span>
<a name="l00035"></a>00035 <span class="preprocessor">#include <sys/socket.h></span>
<a name="l00036"></a>00036 <span class="preprocessor">#include <sys/un.h></span>
<a name="l00037"></a>00037 <span class="preprocessor">#include <fcntl.h></span>
<a name="l00038"></a>00038 <span class="preprocessor">#include <netinet/in.h></span>
<a name="l00039"></a>00039 <span class="preprocessor">#include <stdlib.h></span>
<a name="l00040"></a>00040 <span class="preprocessor">#include <errno.h></span>
<a name="l00041"></a>00041 <span class="preprocessor">#include <unistd.h></span>
<a name="l00042"></a>00042 <span class="preprocessor">#include <string.h></span>
<a name="l00043"></a>00043 <span class="preprocessor">#include <stdarg.h></span>
<a name="l00044"></a>00044 <span class="preprocessor">#include <stdio.h></span>
<a name="l00045"></a>00045 <span class="preprocessor">#include <stddef.h></span>
<a name="l00046"></a>00046 <span class="preprocessor">#include <limits.h></span>
<a name="l00047"></a>00047
<a name="l00048"></a>00048 <span class="preprocessor">#if defined(__linux__) && !defined(SD_DAEMON_DISABLE_MQ)</span>
<a name="l00049"></a>00049 <span class="preprocessor"></span><span class="preprocessor"># include <mqueue.h></span>
<a name="l00050"></a>00050 <span class="preprocessor">#endif</span>
<a name="l00051"></a>00051 <span class="preprocessor"></span>
<a name="l00052"></a>00052 <span class="preprocessor">#include "sd-daemon.h"</span>
<a name="l00053"></a>00053
<a name="l00054"></a>00054 <span class="preprocessor">#if (__GNUC__ >= 4)</span>
<a name="l00055"></a>00055 <span class="preprocessor"></span><span class="preprocessor"># ifdef SD_EXPORT_SYMBOLS</span>
<a name="l00056"></a>00056 <span class="preprocessor"></span><span class="comment">/* Export symbols */</span>
<a name="l00057"></a>00057 <span class="preprocessor"># define _sd_export_ __attribute__ ((visibility("default")))</span>
<a name="l00058"></a>00058 <span class="preprocessor"></span><span class="preprocessor"># else</span>
<a name="l00059"></a>00059 <span class="preprocessor"></span><span class="comment">/* Don't export the symbols */</span>
<a name="l00060"></a>00060 <span class="preprocessor"># define _sd_export_ __attribute__ ((visibility("hidden")))</span>
<a name="l00061"></a>00061 <span class="preprocessor"></span><span class="preprocessor"># endif</span>
<a name="l00062"></a>00062 <span class="preprocessor"></span><span class="preprocessor">#else</span>
<a name="l00063"></a>00063 <span class="preprocessor"></span><span class="preprocessor"># define _sd_export_</span>
<a name="l00064"></a>00064 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00065"></a>00065 <span class="preprocessor"></span>
<a name="l00066"></a>00066 _sd_export_ <span class="keywordtype">int</span> sd_listen_fds(<span class="keywordtype">int</span> unset_environment) {
<a name="l00067"></a>00067
<a name="l00068"></a>00068 <span class="preprocessor">#if defined(DISABLE_SYSTEMD) || !defined(__linux__)</span>
<a name="l00069"></a>00069 <span class="preprocessor"></span> <span class="keywordflow">return</span> 0;
<a name="l00070"></a>00070 <span class="preprocessor">#else</span>
<a name="l00071"></a>00071 <span class="preprocessor"></span> <span class="keywordtype">int</span> r, fd;
<a name="l00072"></a>00072 <span class="keyword">const</span> <span class="keywordtype">char</span> *e;
<a name="l00073"></a>00073 <span class="keywordtype">char</span> *p = <a class="code" href="group__DBusMacros.html#ga070d2ce7b6bb7e5c05602aa8c308d0c4" title="A null pointer, defined appropriately for C or C++.">NULL</a>;
<a name="l00074"></a>00074 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> l;
<a name="l00075"></a>00075
<a name="l00076"></a>00076 e = getenv(<span class="stringliteral">"LISTEN_PID"</span>);
<a name="l00077"></a>00077 <span class="keywordflow">if</span> (!e) {
<a name="l00078"></a>00078 r = 0;
<a name="l00079"></a>00079 <span class="keywordflow">goto</span> finish;
<a name="l00080"></a>00080 }
<a name="l00081"></a>00081
<a name="l00082"></a>00082 errno = 0;
<a name="l00083"></a>00083 l = strtoul(e, &p, 10);
<a name="l00084"></a>00084
<a name="l00085"></a>00085 <span class="keywordflow">if</span> (errno > 0) {
<a name="l00086"></a>00086 r = -errno;
<a name="l00087"></a>00087 <span class="keywordflow">goto</span> finish;
<a name="l00088"></a>00088 }
<a name="l00089"></a>00089
<a name="l00090"></a>00090 <span class="keywordflow">if</span> (!p || p == e || *p || l <= 0) {
<a name="l00091"></a>00091 r = -EINVAL;
<a name="l00092"></a>00092 <span class="keywordflow">goto</span> finish;
<a name="l00093"></a>00093 }
<a name="l00094"></a>00094
<a name="l00095"></a>00095 <span class="comment">/* Is this for us? */</span>
<a name="l00096"></a>00096 <span class="keywordflow">if</span> (getpid() != (pid_t) l) {
<a name="l00097"></a>00097 r = 0;
<a name="l00098"></a>00098 <span class="keywordflow">goto</span> finish;
<a name="l00099"></a>00099 }
<a name="l00100"></a>00100
<a name="l00101"></a>00101 e = getenv(<span class="stringliteral">"LISTEN_FDS"</span>);
<a name="l00102"></a>00102 <span class="keywordflow">if</span> (!e) {
<a name="l00103"></a>00103 r = 0;
<a name="l00104"></a>00104 <span class="keywordflow">goto</span> finish;
<a name="l00105"></a>00105 }
<a name="l00106"></a>00106
<a name="l00107"></a>00107 errno = 0;
<a name="l00108"></a>00108 l = strtoul(e, &p, 10);
<a name="l00109"></a>00109
<a name="l00110"></a>00110 <span class="keywordflow">if</span> (errno > 0) {
<a name="l00111"></a>00111 r = -errno;
<a name="l00112"></a>00112 <span class="keywordflow">goto</span> finish;
<a name="l00113"></a>00113 }
<a name="l00114"></a>00114
<a name="l00115"></a>00115 <span class="keywordflow">if</span> (!p || p == e || *p) {
<a name="l00116"></a>00116 r = -EINVAL;
<a name="l00117"></a>00117 <span class="keywordflow">goto</span> finish;
<a name="l00118"></a>00118 }
<a name="l00119"></a>00119
<a name="l00120"></a>00120 <span class="keywordflow">for</span> (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + (int) l; fd ++) {
<a name="l00121"></a>00121 <span class="keywordtype">int</span> flags;
<a name="l00122"></a>00122
<a name="l00123"></a>00123 flags = fcntl(fd, F_GETFD);
<a name="l00124"></a>00124 <span class="keywordflow">if</span> (flags < 0) {
<a name="l00125"></a>00125 r = -errno;
<a name="l00126"></a>00126 <span class="keywordflow">goto</span> finish;
<a name="l00127"></a>00127 }
<a name="l00128"></a>00128
<a name="l00129"></a>00129 <span class="keywordflow">if</span> (flags & FD_CLOEXEC)
<a name="l00130"></a>00130 <span class="keywordflow">continue</span>;
<a name="l00131"></a>00131
<a name="l00132"></a>00132 <span class="keywordflow">if</span> (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) < 0) {
<a name="l00133"></a>00133 r = -errno;
<a name="l00134"></a>00134 <span class="keywordflow">goto</span> finish;
<a name="l00135"></a>00135 }
<a name="l00136"></a>00136 }
<a name="l00137"></a>00137
<a name="l00138"></a>00138 r = (int) l;
<a name="l00139"></a>00139
<a name="l00140"></a>00140 finish:
<a name="l00141"></a>00141 <span class="keywordflow">if</span> (unset_environment) {
<a name="l00142"></a>00142 unsetenv(<span class="stringliteral">"LISTEN_PID"</span>);
<a name="l00143"></a>00143 unsetenv(<span class="stringliteral">"LISTEN_FDS"</span>);
<a name="l00144"></a>00144 }
<a name="l00145"></a>00145
<a name="l00146"></a>00146 <span class="keywordflow">return</span> r;
<a name="l00147"></a>00147 <span class="preprocessor">#endif</span>
<a name="l00148"></a>00148 <span class="preprocessor"></span>}
<a name="l00149"></a>00149
<a name="l00150"></a>00150 _sd_export_ <span class="keywordtype">int</span> sd_is_fifo(<span class="keywordtype">int</span> fd, <span class="keyword">const</span> <span class="keywordtype">char</span> *path) {
<a name="l00151"></a>00151 <span class="keyword">struct </span>stat st_fd;
<a name="l00152"></a>00152
<a name="l00153"></a>00153 <span class="keywordflow">if</span> (fd < 0)
<a name="l00154"></a>00154 <span class="keywordflow">return</span> -EINVAL;
<a name="l00155"></a>00155
<a name="l00156"></a>00156 <span class="keywordflow">if</span> (fstat(fd, &st_fd) < 0)
<a name="l00157"></a>00157 <span class="keywordflow">return</span> -errno;
<a name="l00158"></a>00158
<a name="l00159"></a>00159 <span class="keywordflow">if</span> (!S_ISFIFO(st_fd.st_mode))
<a name="l00160"></a>00160 <span class="keywordflow">return</span> 0;
<a name="l00161"></a>00161
<a name="l00162"></a>00162 <span class="keywordflow">if</span> (path) {
<a name="l00163"></a>00163 <span class="keyword">struct </span>stat st_path;
<a name="l00164"></a>00164
<a name="l00165"></a>00165 <span class="keywordflow">if</span> (stat(path, &st_path) < 0) {
<a name="l00166"></a>00166
<a name="l00167"></a>00167 <span class="keywordflow">if</span> (errno == ENOENT || errno == ENOTDIR)
<a name="l00168"></a>00168 <span class="keywordflow">return</span> 0;
<a name="l00169"></a>00169
<a name="l00170"></a>00170 <span class="keywordflow">return</span> -errno;
<a name="l00171"></a>00171 }
<a name="l00172"></a>00172
<a name="l00173"></a>00173 <span class="keywordflow">return</span>
<a name="l00174"></a>00174 st_path.st_dev == st_fd.st_dev &&
<a name="l00175"></a>00175 st_path.st_ino == st_fd.st_ino;
<a name="l00176"></a>00176 }
<a name="l00177"></a>00177
<a name="l00178"></a>00178 <span class="keywordflow">return</span> 1;
<a name="l00179"></a>00179 }
<a name="l00180"></a>00180
<a name="l00181"></a>00181 _sd_export_ <span class="keywordtype">int</span> sd_is_special(<span class="keywordtype">int</span> fd, <span class="keyword">const</span> <span class="keywordtype">char</span> *path) {
<a name="l00182"></a>00182 <span class="keyword">struct </span>stat st_fd;
<a name="l00183"></a>00183
<a name="l00184"></a>00184 <span class="keywordflow">if</span> (fd < 0)
<a name="l00185"></a>00185 <span class="keywordflow">return</span> -EINVAL;
<a name="l00186"></a>00186
<a name="l00187"></a>00187 <span class="keywordflow">if</span> (fstat(fd, &st_fd) < 0)
<a name="l00188"></a>00188 <span class="keywordflow">return</span> -errno;
<a name="l00189"></a>00189
<a name="l00190"></a>00190 <span class="keywordflow">if</span> (!S_ISREG(st_fd.st_mode) && !S_ISCHR(st_fd.st_mode))
<a name="l00191"></a>00191 <span class="keywordflow">return</span> 0;
<a name="l00192"></a>00192
<a name="l00193"></a>00193 <span class="keywordflow">if</span> (path) {
<a name="l00194"></a>00194 <span class="keyword">struct </span>stat st_path;
<a name="l00195"></a>00195
<a name="l00196"></a>00196 <span class="keywordflow">if</span> (stat(path, &st_path) < 0) {
<a name="l00197"></a>00197
<a name="l00198"></a>00198 <span class="keywordflow">if</span> (errno == ENOENT || errno == ENOTDIR)
<a name="l00199"></a>00199 <span class="keywordflow">return</span> 0;
<a name="l00200"></a>00200
<a name="l00201"></a>00201 <span class="keywordflow">return</span> -errno;
<a name="l00202"></a>00202 }
<a name="l00203"></a>00203
<a name="l00204"></a>00204 <span class="keywordflow">if</span> (S_ISREG(st_fd.st_mode) && S_ISREG(st_path.st_mode))
<a name="l00205"></a>00205 <span class="keywordflow">return</span>
<a name="l00206"></a>00206 st_path.st_dev == st_fd.st_dev &&
<a name="l00207"></a>00207 st_path.st_ino == st_fd.st_ino;
<a name="l00208"></a>00208 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (S_ISCHR(st_fd.st_mode) && S_ISCHR(st_path.st_mode))
<a name="l00209"></a>00209 <span class="keywordflow">return</span> st_path.st_rdev == st_fd.st_rdev;
<a name="l00210"></a>00210 <span class="keywordflow">else</span>
<a name="l00211"></a>00211 <span class="keywordflow">return</span> 0;
<a name="l00212"></a>00212 }
<a name="l00213"></a>00213
<a name="l00214"></a>00214 <span class="keywordflow">return</span> 1;
<a name="l00215"></a>00215 }
<a name="l00216"></a>00216
<a name="l00217"></a>00217 <span class="keyword">static</span> <span class="keywordtype">int</span> sd_is_socket_internal(<span class="keywordtype">int</span> fd, <span class="keywordtype">int</span> type, <span class="keywordtype">int</span> listening) {
<a name="l00218"></a>00218 <span class="keyword">struct </span>stat st_fd;
<a name="l00219"></a>00219
<a name="l00220"></a>00220 <span class="keywordflow">if</span> (fd < 0 || type < 0)
<a name="l00221"></a>00221 <span class="keywordflow">return</span> -EINVAL;
<a name="l00222"></a>00222
<a name="l00223"></a>00223 <span class="keywordflow">if</span> (fstat(fd, &st_fd) < 0)
<a name="l00224"></a>00224 <span class="keywordflow">return</span> -errno;
<a name="l00225"></a>00225
<a name="l00226"></a>00226 <span class="keywordflow">if</span> (!S_ISSOCK(st_fd.st_mode))
<a name="l00227"></a>00227 <span class="keywordflow">return</span> 0;
<a name="l00228"></a>00228
<a name="l00229"></a>00229 <span class="keywordflow">if</span> (type != 0) {
<a name="l00230"></a>00230 <span class="keywordtype">int</span> other_type = 0;
<a name="l00231"></a>00231 socklen_t l = <span class="keyword">sizeof</span>(other_type);
<a name="l00232"></a>00232
<a name="l00233"></a>00233 <span class="keywordflow">if</span> (getsockopt(fd, SOL_SOCKET, SO_TYPE, &other_type, &l) < 0)
<a name="l00234"></a>00234 <span class="keywordflow">return</span> -errno;
<a name="l00235"></a>00235
<a name="l00236"></a>00236 <span class="keywordflow">if</span> (l != <span class="keyword">sizeof</span>(other_type))
<a name="l00237"></a>00237 <span class="keywordflow">return</span> -EINVAL;
<a name="l00238"></a>00238
<a name="l00239"></a>00239 <span class="keywordflow">if</span> (other_type != type)
<a name="l00240"></a>00240 <span class="keywordflow">return</span> 0;
<a name="l00241"></a>00241 }
<a name="l00242"></a>00242
<a name="l00243"></a>00243 <span class="keywordflow">if</span> (listening >= 0) {
<a name="l00244"></a>00244 <span class="keywordtype">int</span> accepting = 0;
<a name="l00245"></a>00245 socklen_t l = <span class="keyword">sizeof</span>(accepting);
<a name="l00246"></a>00246
<a name="l00247"></a>00247 <span class="keywordflow">if</span> (getsockopt(fd, SOL_SOCKET, SO_ACCEPTCONN, &accepting, &l) < 0)
<a name="l00248"></a>00248 <span class="keywordflow">return</span> -errno;
<a name="l00249"></a>00249
<a name="l00250"></a>00250 <span class="keywordflow">if</span> (l != <span class="keyword">sizeof</span>(accepting))
<a name="l00251"></a>00251 <span class="keywordflow">return</span> -EINVAL;
<a name="l00252"></a>00252
<a name="l00253"></a>00253 <span class="keywordflow">if</span> (!accepting != !listening)
<a name="l00254"></a>00254 <span class="keywordflow">return</span> 0;
<a name="l00255"></a>00255 }
<a name="l00256"></a>00256
<a name="l00257"></a>00257 <span class="keywordflow">return</span> 1;
<a name="l00258"></a>00258 }
<a name="l00259"></a>00259
<a name="l00260"></a><a class="code" href="unionsockaddr__union.html">00260</a> <span class="keyword">union </span><a class="code" href="unionsockaddr__union.html">sockaddr_union</a> {
<a name="l00261"></a>00261 <span class="keyword">struct </span>sockaddr sa;
<a name="l00262"></a>00262 <span class="keyword">struct </span>sockaddr_in in4;
<a name="l00263"></a>00263 <span class="keyword">struct </span>sockaddr_in6 in6;
<a name="l00264"></a>00264 <span class="keyword">struct </span>sockaddr_un un;
<a name="l00265"></a>00265 <span class="keyword">struct </span>sockaddr_storage storage;
<a name="l00266"></a>00266 };
<a name="l00267"></a>00267
<a name="l00268"></a>00268 _sd_export_ <span class="keywordtype">int</span> sd_is_socket(<span class="keywordtype">int</span> fd, <span class="keywordtype">int</span> family, <span class="keywordtype">int</span> type, <span class="keywordtype">int</span> listening) {
<a name="l00269"></a>00269 <span class="keywordtype">int</span> r;
<a name="l00270"></a>00270
<a name="l00271"></a>00271 <span class="keywordflow">if</span> (family < 0)
<a name="l00272"></a>00272 <span class="keywordflow">return</span> -EINVAL;
<a name="l00273"></a>00273
<a name="l00274"></a>00274 r = sd_is_socket_internal(fd, type, listening);
<a name="l00275"></a>00275 <span class="keywordflow">if</span> (r <= 0)
<a name="l00276"></a>00276 <span class="keywordflow">return</span> r;
<a name="l00277"></a>00277
<a name="l00278"></a>00278 <span class="keywordflow">if</span> (family > 0) {
<a name="l00279"></a>00279 <span class="keyword">union </span><a class="code" href="unionsockaddr__union.html">sockaddr_union</a> sockaddr = {};
<a name="l00280"></a>00280 socklen_t l = <span class="keyword">sizeof</span>(sockaddr);
<a name="l00281"></a>00281
<a name="l00282"></a>00282 <span class="keywordflow">if</span> (getsockname(fd, &sockaddr.sa, &l) < 0)
<a name="l00283"></a>00283 <span class="keywordflow">return</span> -errno;
<a name="l00284"></a>00284
<a name="l00285"></a>00285 <span class="keywordflow">if</span> (l < <span class="keyword">sizeof</span>(sa_family_t))
<a name="l00286"></a>00286 <span class="keywordflow">return</span> -EINVAL;
<a name="l00287"></a>00287
<a name="l00288"></a>00288 <span class="keywordflow">return</span> sockaddr.sa.sa_family == family;
<a name="l00289"></a>00289 }
<a name="l00290"></a>00290
<a name="l00291"></a>00291 <span class="keywordflow">return</span> 1;
<a name="l00292"></a>00292 }
<a name="l00293"></a>00293
<a name="l00294"></a>00294 _sd_export_ <span class="keywordtype">int</span> sd_is_socket_inet(<span class="keywordtype">int</span> fd, <span class="keywordtype">int</span> family, <span class="keywordtype">int</span> type, <span class="keywordtype">int</span> listening, uint16_t port) {
<a name="l00295"></a>00295 <span class="keyword">union </span><a class="code" href="unionsockaddr__union.html">sockaddr_union</a> sockaddr = {};
<a name="l00296"></a>00296 socklen_t l = <span class="keyword">sizeof</span>(sockaddr);
<a name="l00297"></a>00297 <span class="keywordtype">int</span> r;
<a name="l00298"></a>00298
<a name="l00299"></a>00299 <span class="keywordflow">if</span> (family != 0 && family != AF_INET && family != AF_INET6)
<a name="l00300"></a>00300 <span class="keywordflow">return</span> -EINVAL;
<a name="l00301"></a>00301
<a name="l00302"></a>00302 r = sd_is_socket_internal(fd, type, listening);
<a name="l00303"></a>00303 <span class="keywordflow">if</span> (r <= 0)
<a name="l00304"></a>00304 <span class="keywordflow">return</span> r;
<a name="l00305"></a>00305
<a name="l00306"></a>00306 <span class="keywordflow">if</span> (getsockname(fd, &sockaddr.sa, &l) < 0)
<a name="l00307"></a>00307 <span class="keywordflow">return</span> -errno;
<a name="l00308"></a>00308
<a name="l00309"></a>00309 <span class="keywordflow">if</span> (l < <span class="keyword">sizeof</span>(sa_family_t))
<a name="l00310"></a>00310 <span class="keywordflow">return</span> -EINVAL;
<a name="l00311"></a>00311
<a name="l00312"></a>00312 <span class="keywordflow">if</span> (sockaddr.sa.sa_family != AF_INET &&
<a name="l00313"></a>00313 sockaddr.sa.sa_family != AF_INET6)
<a name="l00314"></a>00314 <span class="keywordflow">return</span> 0;
<a name="l00315"></a>00315
<a name="l00316"></a>00316 <span class="keywordflow">if</span> (family > 0)
<a name="l00317"></a>00317 <span class="keywordflow">if</span> (sockaddr.sa.sa_family != family)
<a name="l00318"></a>00318 <span class="keywordflow">return</span> 0;
<a name="l00319"></a>00319
<a name="l00320"></a>00320 <span class="keywordflow">if</span> (port > 0) {
<a name="l00321"></a>00321 <span class="keywordflow">if</span> (sockaddr.sa.sa_family == AF_INET) {
<a name="l00322"></a>00322 <span class="keywordflow">if</span> (l < <span class="keyword">sizeof</span>(<span class="keyword">struct</span> sockaddr_in))
<a name="l00323"></a>00323 <span class="keywordflow">return</span> -EINVAL;
<a name="l00324"></a>00324
<a name="l00325"></a>00325 <span class="keywordflow">return</span> htons(port) == sockaddr.in4.sin_port;
<a name="l00326"></a>00326 } <span class="keywordflow">else</span> {
<a name="l00327"></a>00327 <span class="keywordflow">if</span> (l < <span class="keyword">sizeof</span>(<span class="keyword">struct</span> sockaddr_in6))
<a name="l00328"></a>00328 <span class="keywordflow">return</span> -EINVAL;
<a name="l00329"></a>00329
<a name="l00330"></a>00330 <span class="keywordflow">return</span> htons(port) == sockaddr.in6.sin6_port;
<a name="l00331"></a>00331 }
<a name="l00332"></a>00332 }
<a name="l00333"></a>00333
<a name="l00334"></a>00334 <span class="keywordflow">return</span> 1;
<a name="l00335"></a>00335 }
<a name="l00336"></a>00336
<a name="l00337"></a>00337 _sd_export_ <span class="keywordtype">int</span> sd_is_socket_unix(<span class="keywordtype">int</span> fd, <span class="keywordtype">int</span> type, <span class="keywordtype">int</span> listening, <span class="keyword">const</span> <span class="keywordtype">char</span> *path, <span class="keywordtype">size_t</span> length) {
<a name="l00338"></a>00338 <span class="keyword">union </span><a class="code" href="unionsockaddr__union.html">sockaddr_union</a> sockaddr = {};
<a name="l00339"></a>00339 socklen_t l = <span class="keyword">sizeof</span>(sockaddr);
<a name="l00340"></a>00340 <span class="keywordtype">int</span> r;
<a name="l00341"></a>00341
<a name="l00342"></a>00342 r = sd_is_socket_internal(fd, type, listening);
<a name="l00343"></a>00343 <span class="keywordflow">if</span> (r <= 0)
<a name="l00344"></a>00344 <span class="keywordflow">return</span> r;
<a name="l00345"></a>00345
<a name="l00346"></a>00346 <span class="keywordflow">if</span> (getsockname(fd, &sockaddr.sa, &l) < 0)
<a name="l00347"></a>00347 <span class="keywordflow">return</span> -errno;
<a name="l00348"></a>00348
<a name="l00349"></a>00349 <span class="keywordflow">if</span> (l < <span class="keyword">sizeof</span>(sa_family_t))
<a name="l00350"></a>00350 <span class="keywordflow">return</span> -EINVAL;
<a name="l00351"></a>00351
<a name="l00352"></a>00352 <span class="keywordflow">if</span> (sockaddr.sa.sa_family != AF_UNIX)
<a name="l00353"></a>00353 <span class="keywordflow">return</span> 0;
<a name="l00354"></a>00354
<a name="l00355"></a>00355 <span class="keywordflow">if</span> (path) {
<a name="l00356"></a>00356 <span class="keywordflow">if</span> (length == 0)
<a name="l00357"></a>00357 length = strlen(path);
<a name="l00358"></a>00358
<a name="l00359"></a>00359 <span class="keywordflow">if</span> (length == 0)
<a name="l00360"></a>00360 <span class="comment">/* Unnamed socket */</span>
<a name="l00361"></a>00361 <span class="keywordflow">return</span> l == offsetof(<span class="keyword">struct</span> sockaddr_un, sun_path);
<a name="l00362"></a>00362
<a name="l00363"></a>00363 <span class="keywordflow">if</span> (path[0])
<a name="l00364"></a>00364 <span class="comment">/* Normal path socket */</span>
<a name="l00365"></a>00365 <span class="keywordflow">return</span>
<a name="l00366"></a>00366 (l >= offsetof(<span class="keyword">struct</span> sockaddr_un, sun_path) + length + 1) &&
<a name="l00367"></a>00367 memcmp(path, sockaddr.un.sun_path, length+1) == 0;
<a name="l00368"></a>00368 <span class="keywordflow">else</span>
<a name="l00369"></a>00369 <span class="comment">/* Abstract namespace socket */</span>
<a name="l00370"></a>00370 <span class="keywordflow">return</span>
<a name="l00371"></a>00371 (l == offsetof(<span class="keyword">struct</span> sockaddr_un, sun_path) + length) &&
<a name="l00372"></a>00372 memcmp(path, sockaddr.un.sun_path, length) == 0;
<a name="l00373"></a>00373 }
<a name="l00374"></a>00374
<a name="l00375"></a>00375 <span class="keywordflow">return</span> 1;
<a name="l00376"></a>00376 }
<a name="l00377"></a>00377
<a name="l00378"></a>00378 _sd_export_ <span class="keywordtype">int</span> sd_is_mq(<span class="keywordtype">int</span> fd, <span class="keyword">const</span> <span class="keywordtype">char</span> *path) {
<a name="l00379"></a>00379 <span class="preprocessor">#if !defined(__linux__) || defined(SD_DAEMON_DISABLE_MQ)</span>
<a name="l00380"></a>00380 <span class="preprocessor"></span> <span class="keywordflow">return</span> 0;
<a name="l00381"></a>00381 <span class="preprocessor">#else</span>
<a name="l00382"></a>00382 <span class="preprocessor"></span> <span class="keyword">struct </span>mq_attr attr;
<a name="l00383"></a>00383
<a name="l00384"></a>00384 <span class="keywordflow">if</span> (fd < 0)
<a name="l00385"></a>00385 <span class="keywordflow">return</span> -EINVAL;
<a name="l00386"></a>00386
<a name="l00387"></a>00387 <span class="keywordflow">if</span> (mq_getattr(fd, &attr) < 0)
<a name="l00388"></a>00388 <span class="keywordflow">return</span> -errno;
<a name="l00389"></a>00389
<a name="l00390"></a>00390 <span class="keywordflow">if</span> (path) {
<a name="l00391"></a>00391 <span class="keywordtype">char</span> fpath[PATH_MAX];
<a name="l00392"></a>00392 <span class="keyword">struct </span>stat a, b;
<a name="l00393"></a>00393
<a name="l00394"></a>00394 <span class="keywordflow">if</span> (path[0] != <span class="charliteral">'/'</span>)
<a name="l00395"></a>00395 <span class="keywordflow">return</span> -EINVAL;
<a name="l00396"></a>00396
<a name="l00397"></a>00397 <span class="keywordflow">if</span> (fstat(fd, &a) < 0)
<a name="l00398"></a>00398 <span class="keywordflow">return</span> -errno;
<a name="l00399"></a>00399
<a name="l00400"></a>00400 strncpy(stpcpy(fpath, <span class="stringliteral">"/dev/mqueue"</span>), path, <span class="keyword">sizeof</span>(fpath) - 12);
<a name="l00401"></a>00401 fpath[<span class="keyword">sizeof</span>(fpath)-1] = 0;
<a name="l00402"></a>00402
<a name="l00403"></a>00403 <span class="keywordflow">if</span> (stat(fpath, &b) < 0)
<a name="l00404"></a>00404 <span class="keywordflow">return</span> -errno;
<a name="l00405"></a>00405
<a name="l00406"></a>00406 <span class="keywordflow">if</span> (a.st_dev != b.st_dev ||
<a name="l00407"></a>00407 a.st_ino != b.st_ino)
<a name="l00408"></a>00408 <span class="keywordflow">return</span> 0;
<a name="l00409"></a>00409 }
<a name="l00410"></a>00410
<a name="l00411"></a>00411 <span class="keywordflow">return</span> 1;
<a name="l00412"></a>00412 <span class="preprocessor">#endif</span>
<a name="l00413"></a>00413 <span class="preprocessor"></span>}
<a name="l00414"></a>00414
<a name="l00415"></a>00415 _sd_export_ <span class="keywordtype">int</span> sd_notify(<span class="keywordtype">int</span> unset_environment, <span class="keyword">const</span> <span class="keywordtype">char</span> *state) {
<a name="l00416"></a>00416 <span class="preprocessor">#if defined(DISABLE_SYSTEMD) || !defined(__linux__) || !defined(SOCK_CLOEXEC)</span>
<a name="l00417"></a>00417 <span class="preprocessor"></span> <span class="keywordflow">return</span> 0;
<a name="l00418"></a>00418 <span class="preprocessor">#else</span>
<a name="l00419"></a>00419 <span class="preprocessor"></span> <span class="keywordtype">int</span> fd = -1, r;
<a name="l00420"></a>00420 <span class="keyword">struct </span>msghdr msghdr;
<a name="l00421"></a>00421 <span class="keyword">struct </span>iovec iovec;
<a name="l00422"></a>00422 <span class="keyword">union </span><a class="code" href="unionsockaddr__union.html">sockaddr_union</a> sockaddr;
<a name="l00423"></a>00423 <span class="keyword">const</span> <span class="keywordtype">char</span> *e;
<a name="l00424"></a>00424
<a name="l00425"></a>00425 <span class="keywordflow">if</span> (!state) {
<a name="l00426"></a>00426 r = -EINVAL;
<a name="l00427"></a>00427 <span class="keywordflow">goto</span> finish;
<a name="l00428"></a>00428 }
<a name="l00429"></a>00429
<a name="l00430"></a>00430 e = getenv(<span class="stringliteral">"NOTIFY_SOCKET"</span>);
<a name="l00431"></a>00431 <span class="keywordflow">if</span> (!e)
<a name="l00432"></a>00432 <span class="keywordflow">return</span> 0;
<a name="l00433"></a>00433
<a name="l00434"></a>00434 <span class="comment">/* Must be an abstract socket, or an absolute path */</span>
<a name="l00435"></a>00435 <span class="keywordflow">if</span> ((e[0] != <span class="charliteral">'@'</span> && e[0] != <span class="charliteral">'/'</span>) || e[1] == 0) {
<a name="l00436"></a>00436 r = -EINVAL;
<a name="l00437"></a>00437 <span class="keywordflow">goto</span> finish;
<a name="l00438"></a>00438 }
<a name="l00439"></a>00439
<a name="l00440"></a>00440 fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0);
<a name="l00441"></a>00441 <span class="keywordflow">if</span> (fd < 0) {
<a name="l00442"></a>00442 r = -errno;
<a name="l00443"></a>00443 <span class="keywordflow">goto</span> finish;
<a name="l00444"></a>00444 }
<a name="l00445"></a>00445
<a name="l00446"></a>00446 memset(&sockaddr, 0, <span class="keyword">sizeof</span>(sockaddr));
<a name="l00447"></a>00447 sockaddr.sa.sa_family = AF_UNIX;
<a name="l00448"></a>00448 strncpy(sockaddr.un.sun_path, e, <span class="keyword">sizeof</span>(sockaddr.un.sun_path));
<a name="l00449"></a>00449
<a name="l00450"></a>00450 <span class="keywordflow">if</span> (sockaddr.un.sun_path[0] == <span class="charliteral">'@'</span>)
<a name="l00451"></a>00451 sockaddr.un.sun_path[0] = 0;
<a name="l00452"></a>00452
<a name="l00453"></a>00453 memset(&iovec, 0, <span class="keyword">sizeof</span>(iovec));
<a name="l00454"></a>00454 iovec.iov_base = (<span class="keywordtype">char</span>*) state;
<a name="l00455"></a>00455 iovec.iov_len = strlen(state);
<a name="l00456"></a>00456
<a name="l00457"></a>00457 memset(&msghdr, 0, <span class="keyword">sizeof</span>(msghdr));
<a name="l00458"></a>00458 msghdr.msg_name = &sockaddr;
<a name="l00459"></a>00459 msghdr.msg_namelen = offsetof(<span class="keyword">struct</span> sockaddr_un, sun_path) + strlen(e);
<a name="l00460"></a>00460
<a name="l00461"></a>00461 <span class="keywordflow">if</span> (msghdr.msg_namelen > <span class="keyword">sizeof</span>(<span class="keyword">struct</span> sockaddr_un))
<a name="l00462"></a>00462 msghdr.msg_namelen = <span class="keyword">sizeof</span>(<span class="keyword">struct </span>sockaddr_un);
<a name="l00463"></a>00463
<a name="l00464"></a>00464 msghdr.msg_iov = &iovec;
<a name="l00465"></a>00465 msghdr.msg_iovlen = 1;
<a name="l00466"></a>00466
<a name="l00467"></a>00467 <span class="keywordflow">if</span> (sendmsg(fd, &msghdr, MSG_NOSIGNAL) < 0) {
<a name="l00468"></a>00468 r = -errno;
<a name="l00469"></a>00469 <span class="keywordflow">goto</span> finish;
<a name="l00470"></a>00470 }
<a name="l00471"></a>00471
<a name="l00472"></a>00472 r = 1;
<a name="l00473"></a>00473
<a name="l00474"></a>00474 finish:
<a name="l00475"></a>00475 <span class="keywordflow">if</span> (unset_environment)
<a name="l00476"></a>00476 unsetenv(<span class="stringliteral">"NOTIFY_SOCKET"</span>);
<a name="l00477"></a>00477
<a name="l00478"></a>00478 <span class="keywordflow">if</span> (fd >= 0)
<a name="l00479"></a>00479 close(fd);
<a name="l00480"></a>00480
<a name="l00481"></a>00481 <span class="keywordflow">return</span> r;
<a name="l00482"></a>00482 <span class="preprocessor">#endif</span>
<a name="l00483"></a>00483 <span class="preprocessor"></span>}
<a name="l00484"></a>00484
<a name="l00485"></a>00485 _sd_export_ <span class="keywordtype">int</span> sd_notifyf(<span class="keywordtype">int</span> unset_environment, <span class="keyword">const</span> <span class="keywordtype">char</span> *format, ...) {
<a name="l00486"></a>00486 <span class="preprocessor">#if defined(DISABLE_SYSTEMD) || !defined(__linux__)</span>
<a name="l00487"></a>00487 <span class="preprocessor"></span> <span class="keywordflow">return</span> 0;
<a name="l00488"></a>00488 <span class="preprocessor">#else</span>
<a name="l00489"></a>00489 <span class="preprocessor"></span> va_list ap;
<a name="l00490"></a>00490 <span class="keywordtype">char</span> *p = <a class="code" href="group__DBusMacros.html#ga070d2ce7b6bb7e5c05602aa8c308d0c4" title="A null pointer, defined appropriately for C or C++.">NULL</a>;
<a name="l00491"></a>00491 <span class="keywordtype">int</span> r;
<a name="l00492"></a>00492
<a name="l00493"></a>00493 va_start(ap, format);
<a name="l00494"></a>00494 r = vasprintf(&p, format, ap);
<a name="l00495"></a>00495 va_end(ap);
<a name="l00496"></a>00496
<a name="l00497"></a>00497 <span class="keywordflow">if</span> (r < 0 || !p)
<a name="l00498"></a>00498 <span class="keywordflow">return</span> -ENOMEM;
<a name="l00499"></a>00499
<a name="l00500"></a>00500 r = sd_notify(unset_environment, p);
<a name="l00501"></a>00501 free(p);
<a name="l00502"></a>00502
<a name="l00503"></a>00503 <span class="keywordflow">return</span> r;
<a name="l00504"></a>00504 <span class="preprocessor">#endif</span>
<a name="l00505"></a>00505 <span class="preprocessor"></span>}
<a name="l00506"></a>00506
<a name="l00507"></a>00507 _sd_export_ <span class="keywordtype">int</span> sd_booted(<span class="keywordtype">void</span>) {
<a name="l00508"></a>00508 <span class="preprocessor">#if defined(DISABLE_SYSTEMD) || !defined(__linux__)</span>
<a name="l00509"></a>00509 <span class="preprocessor"></span> <span class="keywordflow">return</span> 0;
<a name="l00510"></a>00510 <span class="preprocessor">#else</span>
<a name="l00511"></a>00511 <span class="preprocessor"></span> <span class="keyword">struct </span>stat st;
<a name="l00512"></a>00512
<a name="l00513"></a>00513 <span class="comment">/* We test whether the runtime unit file directory has been</span>
<a name="l00514"></a>00514 <span class="comment"> * created. This takes place in mount-setup.c, so is</span>
<a name="l00515"></a>00515 <span class="comment"> * guaranteed to happen very early during boot. */</span>
<a name="l00516"></a>00516
<a name="l00517"></a>00517 <span class="keywordflow">if</span> (lstat(<span class="stringliteral">"/run/systemd/system/"</span>, &st) < 0)
<a name="l00518"></a>00518 <span class="keywordflow">return</span> 0;
<a name="l00519"></a>00519
<a name="l00520"></a>00520 <span class="keywordflow">return</span> !!S_ISDIR(st.st_mode);
<a name="l00521"></a>00521 <span class="preprocessor">#endif</span>
<a name="l00522"></a>00522 <span class="preprocessor"></span>}
</pre></div></div><!-- contents -->
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