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<h1>rpmio/ugid.c</h1><a href="ugid_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001
<a name="l00005"></a>00005 <span class="preprocessor">#include "<a class="code" href="system_8h.html">system.h</a>"</span>
<a name="l00006"></a>00006 <span class="preprocessor">#include "<a class="code" href="ugid_8h.html">ugid.h</a>"</span>
<a name="l00007"></a>00007 <span class="preprocessor">#include "<a class="code" href="debug_8h.html">debug.h</a>"</span>
<a name="l00008"></a>00008
<a name="l00009"></a>00009 <span class="comment">/* unameToUid(), uidTouname() and the group variants are really poorly</span>
<a name="l00010"></a>00010 <span class="comment"> implemented. They really ought to use hash tables. I just made the</span>
<a name="l00011"></a>00011 <span class="comment"> guess that most files would be owned by root or the same person/group</span>
<a name="l00012"></a>00012 <span class="comment"> who owned the last file. Those two values are cached, everything else</span>
<a name="l00013"></a>00013 <span class="comment"> is looked up via getpw() and getgr() functions. If this performs</span>
<a name="l00014"></a>00014 <span class="comment"> too poorly I'll have to implement it properly :-( */</span>
<a name="l00015"></a>00015
<a name="l00016"></a><a class="code" href="ugid_8h.html#deef09986d46cedf92013ee9a4beb4a0">00016</a> <span class="keywordtype">int</span> <a class="code" href="ugid_8c.html#deef09986d46cedf92013ee9a4beb4a0">unameToUid</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> * thisUname, uid_t * uid)
<a name="l00017"></a>00017 {
<a name="l00018"></a>00018 <span class="comment">/*@only@*/</span> <span class="keyword">static</span> <span class="keywordtype">char</span> * lastUname = NULL;
<a name="l00019"></a>00019 <span class="keyword">static</span> size_t lastUnameLen = 0;
<a name="l00020"></a>00020 <span class="keyword">static</span> size_t lastUnameAlloced;
<a name="l00021"></a>00021 <span class="keyword">static</span> uid_t lastUid;
<a name="l00022"></a>00022 <span class="keyword">struct </span>passwd * pwent;
<a name="l00023"></a>00023 size_t thisUnameLen;
<a name="l00024"></a>00024
<a name="l00025"></a>00025 <span class="keywordflow">if</span> (!thisUname) {
<a name="l00026"></a>00026 lastUnameLen = 0;
<a name="l00027"></a>00027 <span class="keywordflow">return</span> -1;
<a name="l00028"></a>00028 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (strcmp(thisUname, <span class="stringliteral">"root"</span>) == 0) {
<a name="l00029"></a>00029 <span class="comment">/*@-boundswrite@*/</span>
<a name="l00030"></a>00030 *uid = 0;
<a name="l00031"></a>00031 <span class="comment">/*@=boundswrite@*/</span>
<a name="l00032"></a>00032 <span class="keywordflow">return</span> 0;
<a name="l00033"></a>00033 }
<a name="l00034"></a>00034
<a name="l00035"></a>00035 thisUnameLen = strlen(thisUname);
<a name="l00036"></a>00036 <span class="keywordflow">if</span> (lastUname == NULL || thisUnameLen != lastUnameLen ||
<a name="l00037"></a>00037 strcmp(thisUname, lastUname) != 0)
<a name="l00038"></a>00038 {
<a name="l00039"></a>00039 <span class="keywordflow">if</span> (lastUnameAlloced < thisUnameLen + 1) {
<a name="l00040"></a>00040 lastUnameAlloced = thisUnameLen + 10;
<a name="l00041"></a>00041 lastUname = <a class="code" href="system_8h.html#93a8ec6e8a6eef0f62b7e5b50d0bf9e4">xrealloc</a>(lastUname, lastUnameAlloced); <span class="comment">/* XXX memory leak */</span>
<a name="l00042"></a>00042 }
<a name="l00043"></a>00043 <span class="comment">/*@-boundswrite@*/</span>
<a name="l00044"></a>00044 strcpy(lastUname, thisUname);
<a name="l00045"></a>00045 <span class="comment">/*@=boundswrite@*/</span>
<a name="l00046"></a>00046
<a name="l00047"></a>00047 pwent = getpwnam(thisUname);
<a name="l00048"></a>00048 <span class="keywordflow">if</span> (pwent == NULL) {
<a name="l00049"></a>00049 <span class="comment">/*@-internalglobs@*/</span> <span class="comment">/* FIX: shrug */</span>
<a name="l00050"></a>00050 endpwent();
<a name="l00051"></a>00051 <span class="comment">/*@=internalglobs@*/</span>
<a name="l00052"></a>00052 pwent = getpwnam(thisUname);
<a name="l00053"></a>00053 <span class="keywordflow">if</span> (pwent == NULL) <span class="keywordflow">return</span> -1;
<a name="l00054"></a>00054 }
<a name="l00055"></a>00055
<a name="l00056"></a>00056 lastUid = pwent->pw_uid;
<a name="l00057"></a>00057 }
<a name="l00058"></a>00058
<a name="l00059"></a>00059 <span class="comment">/*@-boundswrite@*/</span>
<a name="l00060"></a>00060 *uid = lastUid;
<a name="l00061"></a>00061 <span class="comment">/*@=boundswrite@*/</span>
<a name="l00062"></a>00062
<a name="l00063"></a>00063 <span class="keywordflow">return</span> 0;
<a name="l00064"></a>00064 }
<a name="l00065"></a>00065
<a name="l00066"></a><a class="code" href="ugid_8h.html#b16ffdc01a5000e14a299127870e6290">00066</a> <span class="keywordtype">int</span> <a class="code" href="ugid_8c.html#b16ffdc01a5000e14a299127870e6290">gnameToGid</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> * thisGname, gid_t * gid)
<a name="l00067"></a>00067 {
<a name="l00068"></a>00068 <span class="comment">/*@only@*/</span> <span class="keyword">static</span> <span class="keywordtype">char</span> * lastGname = NULL;
<a name="l00069"></a>00069 <span class="keyword">static</span> size_t lastGnameLen = 0;
<a name="l00070"></a>00070 <span class="keyword">static</span> size_t lastGnameAlloced;
<a name="l00071"></a>00071 <span class="keyword">static</span> gid_t lastGid;
<a name="l00072"></a>00072 size_t thisGnameLen;
<a name="l00073"></a>00073 <span class="keyword">struct </span>group * grent;
<a name="l00074"></a>00074
<a name="l00075"></a>00075 <span class="keywordflow">if</span> (thisGname == NULL) {
<a name="l00076"></a>00076 lastGnameLen = 0;
<a name="l00077"></a>00077 <span class="keywordflow">return</span> -1;
<a name="l00078"></a>00078 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (strcmp(thisGname, <span class="stringliteral">"root"</span>) == 0) {
<a name="l00079"></a>00079 <span class="comment">/*@-boundswrite@*/</span>
<a name="l00080"></a>00080 *gid = 0;
<a name="l00081"></a>00081 <span class="comment">/*@=boundswrite@*/</span>
<a name="l00082"></a>00082 <span class="keywordflow">return</span> 0;
<a name="l00083"></a>00083 }
<a name="l00084"></a>00084
<a name="l00085"></a>00085 thisGnameLen = strlen(thisGname);
<a name="l00086"></a>00086 <span class="keywordflow">if</span> (lastGname == NULL || thisGnameLen != lastGnameLen ||
<a name="l00087"></a>00087 strcmp(thisGname, lastGname) != 0)
<a name="l00088"></a>00088 {
<a name="l00089"></a>00089 <span class="keywordflow">if</span> (lastGnameAlloced < thisGnameLen + 1) {
<a name="l00090"></a>00090 lastGnameAlloced = thisGnameLen + 10;
<a name="l00091"></a>00091 lastGname = <a class="code" href="system_8h.html#93a8ec6e8a6eef0f62b7e5b50d0bf9e4">xrealloc</a>(lastGname, lastGnameAlloced); <span class="comment">/* XXX memory leak */</span>
<a name="l00092"></a>00092 }
<a name="l00093"></a>00093 <span class="comment">/*@-boundswrite@*/</span>
<a name="l00094"></a>00094 strcpy(lastGname, thisGname);
<a name="l00095"></a>00095 <span class="comment">/*@=boundswrite@*/</span>
<a name="l00096"></a>00096
<a name="l00097"></a>00097 grent = getgrnam(thisGname);
<a name="l00098"></a>00098 <span class="keywordflow">if</span> (grent == NULL) {
<a name="l00099"></a>00099 <span class="comment">/*@-internalglobs@*/</span> <span class="comment">/* FIX: shrug */</span>
<a name="l00100"></a>00100 endgrent();
<a name="l00101"></a>00101 <span class="comment">/*@=internalglobs@*/</span>
<a name="l00102"></a>00102 grent = getgrnam(thisGname);
<a name="l00103"></a>00103 <span class="keywordflow">if</span> (grent == NULL) {
<a name="l00104"></a>00104 <span class="comment">/* XXX The filesystem package needs group/lock w/o getgrnam. */</span>
<a name="l00105"></a>00105 <span class="keywordflow">if</span> (strcmp(thisGname, <span class="stringliteral">"lock"</span>) == 0) {
<a name="l00106"></a>00106 <span class="comment">/*@-boundswrite@*/</span>
<a name="l00107"></a>00107 *gid = lastGid = 54;
<a name="l00108"></a>00108 <span class="comment">/*@=boundswrite@*/</span>
<a name="l00109"></a>00109 <span class="keywordflow">return</span> 0;
<a name="l00110"></a>00110 } <span class="keywordflow">else</span>
<a name="l00111"></a>00111 <span class="keywordflow">if</span> (strcmp(thisGname, <span class="stringliteral">"mail"</span>) == 0) {
<a name="l00112"></a>00112 <span class="comment">/*@-boundswrite@*/</span>
<a name="l00113"></a>00113 *gid = lastGid = 12;
<a name="l00114"></a>00114 <span class="comment">/*@=boundswrite@*/</span>
<a name="l00115"></a>00115 <span class="keywordflow">return</span> 0;
<a name="l00116"></a>00116 } <span class="keywordflow">else</span>
<a name="l00117"></a>00117 <span class="keywordflow">return</span> -1;
<a name="l00118"></a>00118 }
<a name="l00119"></a>00119 }
<a name="l00120"></a>00120 lastGid = grent->gr_gid;
<a name="l00121"></a>00121 }
<a name="l00122"></a>00122
<a name="l00123"></a>00123 <span class="comment">/*@-boundswrite@*/</span>
<a name="l00124"></a>00124 *gid = lastGid;
<a name="l00125"></a>00125 <span class="comment">/*@=boundswrite@*/</span>
<a name="l00126"></a>00126
<a name="l00127"></a>00127 <span class="keywordflow">return</span> 0;
<a name="l00128"></a>00128 }
<a name="l00129"></a>00129
<a name="l00130"></a><a class="code" href="ugid_8h.html#0ff2fe2a08ba39cafca784321b204826">00130</a> <span class="keywordtype">char</span> * <a class="code" href="ugid_8c.html#0ff2fe2a08ba39cafca784321b204826">uidToUname</a>(uid_t uid)
<a name="l00131"></a>00131 {
<a name="l00132"></a>00132 <span class="keyword">static</span> uid_t lastUid = (uid_t) -1;
<a name="l00133"></a>00133 <span class="comment">/*@only@*/</span> <span class="keyword">static</span> <span class="keywordtype">char</span> * lastUname = NULL;
<a name="l00134"></a>00134 <span class="keyword">static</span> size_t lastUnameLen = 0;
<a name="l00135"></a>00135
<a name="l00136"></a>00136 <span class="keywordflow">if</span> (uid == (uid_t) -1) {
<a name="l00137"></a>00137 lastUid = (uid_t) -1;
<a name="l00138"></a>00138 <span class="keywordflow">return</span> NULL;
<a name="l00139"></a>00139 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (uid == (uid_t) 0) {
<a name="l00140"></a>00140 <span class="keywordflow">return</span> <span class="stringliteral">"root"</span>;
<a name="l00141"></a>00141 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (uid == lastUid) {
<a name="l00142"></a>00142 <span class="keywordflow">return</span> lastUname;
<a name="l00143"></a>00143 } <span class="keywordflow">else</span> {
<a name="l00144"></a>00144 <span class="keyword">struct </span>passwd * pwent = getpwuid(uid);
<a name="l00145"></a>00145 size_t len;
<a name="l00146"></a>00146
<a name="l00147"></a>00147 <span class="keywordflow">if</span> (pwent == NULL) <span class="keywordflow">return</span> NULL;
<a name="l00148"></a>00148
<a name="l00149"></a>00149 lastUid = uid;
<a name="l00150"></a>00150 len = strlen(pwent->pw_name);
<a name="l00151"></a>00151 <span class="keywordflow">if</span> (lastUnameLen < len + 1) {
<a name="l00152"></a>00152 lastUnameLen = len + 20;
<a name="l00153"></a>00153 lastUname = <a class="code" href="system_8h.html#93a8ec6e8a6eef0f62b7e5b50d0bf9e4">xrealloc</a>(lastUname, lastUnameLen);
<a name="l00154"></a>00154 }
<a name="l00155"></a>00155 <span class="comment">/*@-boundswrite@*/</span>
<a name="l00156"></a>00156 strcpy(lastUname, pwent->pw_name);
<a name="l00157"></a>00157 <span class="comment">/*@=boundswrite@*/</span>
<a name="l00158"></a>00158
<a name="l00159"></a>00159 <span class="keywordflow">return</span> lastUname;
<a name="l00160"></a>00160 }
<a name="l00161"></a>00161 }
<a name="l00162"></a>00162
<a name="l00163"></a><a class="code" href="ugid_8h.html#c926ab8e747fe95a003e4aa070496955">00163</a> <span class="keywordtype">char</span> * <a class="code" href="ugid_8c.html#c926ab8e747fe95a003e4aa070496955">gidToGname</a>(gid_t gid)
<a name="l00164"></a>00164 {
<a name="l00165"></a>00165 <span class="keyword">static</span> gid_t lastGid = (gid_t) -1;
<a name="l00166"></a>00166 <span class="comment">/*@only@*/</span> <span class="keyword">static</span> <span class="keywordtype">char</span> * lastGname = NULL;
<a name="l00167"></a>00167 <span class="keyword">static</span> size_t lastGnameLen = 0;
<a name="l00168"></a>00168
<a name="l00169"></a>00169 <span class="keywordflow">if</span> (gid == (gid_t) -1) {
<a name="l00170"></a>00170 lastGid = (gid_t) -1;
<a name="l00171"></a>00171 <span class="keywordflow">return</span> NULL;
<a name="l00172"></a>00172 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (gid == (gid_t) 0) {
<a name="l00173"></a>00173 <span class="keywordflow">return</span> <span class="stringliteral">"root"</span>;
<a name="l00174"></a>00174 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (gid == lastGid) {
<a name="l00175"></a>00175 <span class="keywordflow">return</span> lastGname;
<a name="l00176"></a>00176 } <span class="keywordflow">else</span> {
<a name="l00177"></a>00177 <span class="keyword">struct </span>group * grent = getgrgid(gid);
<a name="l00178"></a>00178 size_t len;
<a name="l00179"></a>00179
<a name="l00180"></a>00180 <span class="keywordflow">if</span> (grent == NULL) <span class="keywordflow">return</span> NULL;
<a name="l00181"></a>00181
<a name="l00182"></a>00182 lastGid = gid;
<a name="l00183"></a>00183 len = strlen(grent->gr_name);
<a name="l00184"></a>00184 <span class="keywordflow">if</span> (lastGnameLen < len + 1) {
<a name="l00185"></a>00185 lastGnameLen = len + 20;
<a name="l00186"></a>00186 lastGname = <a class="code" href="system_8h.html#93a8ec6e8a6eef0f62b7e5b50d0bf9e4">xrealloc</a>(lastGname, lastGnameLen);
<a name="l00187"></a>00187 }
<a name="l00188"></a>00188 <span class="comment">/*@-boundswrite@*/</span>
<a name="l00189"></a>00189 strcpy(lastGname, grent->gr_name);
<a name="l00190"></a>00190 <span class="comment">/*@=boundswrite@*/</span>
<a name="l00191"></a>00191
<a name="l00192"></a>00192 <span class="keywordflow">return</span> lastGname;
<a name="l00193"></a>00193 }
<a name="l00194"></a>00194 }
</pre></div><hr size="1"><address style="align: right;"><small>Generated on 1 Oct 2013 for rpm by
<a href="http://www.doxygen.org/index.html">
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