257 lines
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257 lines
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<li class="navelem"><a class="el" href="dir_68267d1309a1af8e8297ef4c3efbcdba.html">src</a></li> </ul>
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<div class="header">
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<a href="#func-members">Functions</a> </div>
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<div class="headertitle"><div class="title">env.c File Reference</div></div>
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</div><!--header-->
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<div class="contents">
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<p>Gestionnaire des variables d'environnement pour le shell intégré du SGF.
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<a href="#details">More...</a></p>
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<div class="textblock"><code>#include "<a class="el" href="env_8h_source.html">env.h</a>"</code><br />
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</div><div class="textblock"><div class="dynheader">
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Include dependency graph for env.c:</div>
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<div class="dyncontent">
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<div class="center"><img src="env_8c__incl.png" border="0" usemap="#asrc_2env_8c" alt=""/></div>
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</div>
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</div><table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="func-members" name="func-members"></a>
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Functions</h2></td></tr>
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<tr class="memitem:a9f03a70f263b1c039d6a3975b02cfadd" id="r_a9f03a70f263b1c039d6a3975b02cfadd"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structenv.html">env</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="env_8c.html#a9f03a70f263b1c039d6a3975b02cfadd">init_envs</a> ()</td></tr>
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<tr class="memdesc:a9f03a70f263b1c039d6a3975b02cfadd"><td class="mdescLeft"> </td><td class="mdescRight">Initialise le tableau des variables d'environnement par défaut. <br /></td></tr>
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<tr class="separator:a9f03a70f263b1c039d6a3975b02cfadd"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a21ed94d5b2eb2f40aaf40cc57d3d6309" id="r_a21ed94d5b2eb2f40aaf40cc57d3d6309"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structenv.html">env</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="env_8c.html#a21ed94d5b2eb2f40aaf40cc57d3d6309">get_instance</a> ()</td></tr>
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<tr class="memdesc:a21ed94d5b2eb2f40aaf40cc57d3d6309"><td class="mdescLeft"> </td><td class="mdescRight">Récupère l'instance unique (Singleton) du tableau des variables d'environnement. <br /></td></tr>
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<tr class="separator:a21ed94d5b2eb2f40aaf40cc57d3d6309"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a684d25b4cc5d9bf14dd67309de8568bf" id="r_a684d25b4cc5d9bf14dd67309de8568bf"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="env_8c.html#a684d25b4cc5d9bf14dd67309de8568bf">get_env_len</a> (<a class="el" href="structenv.html">env</a> *envs)</td></tr>
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<tr class="memdesc:a684d25b4cc5d9bf14dd67309de8568bf"><td class="mdescLeft"> </td><td class="mdescRight">Calcule le nombre de variables d'environnement actives dans le tableau. <br /></td></tr>
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<tr class="separator:a684d25b4cc5d9bf14dd67309de8568bf"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a0ce3d2cd4284dee64477512b489ddb4f" id="r_a0ce3d2cd4284dee64477512b489ddb4f"><td class="memItemLeft" align="right" valign="top">char * </td><td class="memItemRight" valign="bottom"><a class="el" href="env_8c.html#a0ce3d2cd4284dee64477512b489ddb4f">get_env_value</a> (char *key)</td></tr>
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<tr class="memdesc:a0ce3d2cd4284dee64477512b489ddb4f"><td class="mdescLeft"> </td><td class="mdescRight">Recherche et retourne la valeur d'une variable d'environnement d'après sa clé. <br /></td></tr>
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<tr class="separator:a0ce3d2cd4284dee64477512b489ddb4f"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a2447e9b952249197b828841281389e8f" id="r_a2447e9b952249197b828841281389e8f"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="env_8c.html#a2447e9b952249197b828841281389e8f">set_env_value</a> (char *key, char *value)</td></tr>
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<tr class="memdesc:a2447e9b952249197b828841281389e8f"><td class="mdescLeft"> </td><td class="mdescRight">Modifie la valeur d'une variable d'environnement existante. <br /></td></tr>
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<tr class="separator:a2447e9b952249197b828841281389e8f"><td class="memSeparator" colspan="2"> </td></tr>
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</table>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
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<div class="textblock"><p>Gestionnaire des variables d'environnement pour le shell intégré du SGF. </p>
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<p>Ce fichier implémente un registre de type dictionnaire (Clé / Valeur) sous forme de Singleton pour suivre l'état du shell (répertoire courant PWD, utilisateur, etc.). </p>
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</div><h2 class="groupheader">Function Documentation</h2>
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<a id="a684d25b4cc5d9bf14dd67309de8568bf" name="a684d25b4cc5d9bf14dd67309de8568bf"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a684d25b4cc5d9bf14dd67309de8568bf">◆ </a></span>get_env_len()</h2>
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<td class="memname">int get_env_len </td>
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<td>(</td>
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<td class="paramtype"><a class="el" href="structenv.html">env</a> * </td>
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<td class="paramname"><em>envs</em></td><td>)</td>
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<td></td>
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<p>Calcule le nombre de variables d'environnement actives dans le tableau. </p>
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<p>Parcourt le tableau de structures jusqu'à rencontrer la sentinelle (clé égale à NULL).</p>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">envs</td><td>Pointeur vers le tableau de variables d'environnement. </td></tr>
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</table>
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</dd>
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</dl>
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<dl class="section return"><dt>Returns</dt><dd>int Le nombre de variables stockées (hors sentinelle). </dd></dl>
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</div>
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</div>
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<a id="a0ce3d2cd4284dee64477512b489ddb4f" name="a0ce3d2cd4284dee64477512b489ddb4f"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a0ce3d2cd4284dee64477512b489ddb4f">◆ </a></span>get_env_value()</h2>
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<td class="memname">char * get_env_value </td>
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<td>(</td>
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<td class="paramtype">char * </td>
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<td class="paramname"><em>key</em></td><td>)</td>
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<td></td>
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</tr>
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</table>
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</div><div class="memdoc">
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<p>Recherche et retourne la valeur d'une variable d'environnement d'après sa clé. </p>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">key</td><td>Le nom de la variable recherchée (ex: "PWD"). </td></tr>
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</table>
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</dd>
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</dl>
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<dl class="section return"><dt>Returns</dt><dd>char* Un pointeur vers la chaîne de caractères contenant la valeur, ou NULL si la clé n'a pas été trouvée. </dd></dl>
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</div>
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</div>
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<a id="a21ed94d5b2eb2f40aaf40cc57d3d6309" name="a21ed94d5b2eb2f40aaf40cc57d3d6309"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a21ed94d5b2eb2f40aaf40cc57d3d6309">◆ </a></span>get_instance()</h2>
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<td class="memname"><a class="el" href="structenv.html">env</a> * get_instance </td>
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<td>(</td>
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<td class="paramname"></td><td>)</td>
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<td></td>
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</div><div class="memdoc">
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<p>Récupère l'instance unique (Singleton) du tableau des variables d'environnement. </p>
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<p>Si le tableau n'a pas encore été créé, cette fonction appelle <a class="el" href="env_8c.html#a9f03a70f263b1c039d6a3975b02cfadd" title="Initialise le tableau des variables d'environnement par défaut.">init_envs()</a>. Les appels suivants renverront directement la même zone mémoire.</p>
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<dl class="section return"><dt>Returns</dt><dd>env* Pointeur vers l'instance unique du tableau d'environnement. </dd></dl>
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<a id="a9f03a70f263b1c039d6a3975b02cfadd" name="a9f03a70f263b1c039d6a3975b02cfadd"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a9f03a70f263b1c039d6a3975b02cfadd">◆ </a></span>init_envs()</h2>
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<td class="memname"><a class="el" href="structenv.html">env</a> * init_envs </td>
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<td>(</td>
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<td class="paramname"></td><td>)</td>
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<td></td>
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<p>Initialise le tableau des variables d'environnement par défaut. </p>
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<p>Alloue l'espace mémoire pour les variables de base ("PWD", "USER", "HOST") et ajoute une sentinelle NULL à la fin pour permettre un parcours sûr.</p>
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<dl class="section return"><dt>Returns</dt><dd>env* Un pointeur vers le tableau d'environnements alloué, ou NULL en cas d'échec du malloc. </dd></dl>
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</div>
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<a id="a2447e9b952249197b828841281389e8f" name="a2447e9b952249197b828841281389e8f"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a2447e9b952249197b828841281389e8f">◆ </a></span>set_env_value()</h2>
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<td class="memname">int set_env_value </td>
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<td>(</td>
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<td class="paramtype">char * </td>
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<td class="paramname"><em>key</em>, </td>
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</tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">char * </td>
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<td class="paramname"><em>value</em> </td>
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</tr>
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<tr>
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<td></td>
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<td>)</td>
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<td></td><td></td>
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</div><div class="memdoc">
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<p>Modifie la valeur d'une variable d'environnement existante. </p>
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<dl class="section note"><dt>Note</dt><dd>La nouvelle valeur est dupliquée dynamiquement en mémoire via <code>strdup</code>. </dd></dl>
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<dl class="section warning"><dt>Warning</dt><dd>Cette fonction ne gère pas l'ajout d'une nouvelle clé si elle n'existe pas déjà.</dd></dl>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">key</td><td>Le nom de la variable à modifier. </td></tr>
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<tr><td class="paramname">value</td><td>La nouvelle chaîne de caractères à affecter. </td></tr>
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</table>
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</dd>
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</dl>
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<dl class="section return"><dt>Returns</dt><dd>int 1 si la modification a réussi, 0 si la clé n'existe pas dans le tableau. </dd></dl>
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</div>
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