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334 lines
18 KiB
HTML
334 lines
18 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<!-- This HTML file generated by cxref (version 1.6a). -->
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<!-- cxref program (c) Andrew M. Bishop 1995,96,97,98,99,2000,01,02,03,04,05. -->
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<!--
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Cxref: cxref -block-comments -verbatim-comments -xref-all -index-all -html-src -Oxref ModuleCmd_Switch.c
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CPP : cxref-cpp -lang-c -C -dD -dI
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-->
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<HTML>
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<HEAD>
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<TITLE>Source File ModuleCmd_Switch.c</TITLE>
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<LINK rel="stylesheet" href="cxref.css" type="text/css">
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</HEAD>
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<BODY>
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<pre>
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<a name="line1">1 |</a> /*****
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<a name="line2">2 |</a> ** ** Module Header ******************************************************* **
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<a name="line3">3 |</a> ** **
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<a name="line4">4 |</a> ** Modules Revision 3.0 **
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<a name="line5">5 |</a> ** Providing a flexible user environment **
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<a name="line6">6 |</a> ** **
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<a name="line7">7 |</a> ** File: ModuleCmd_Switch.c **
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<a name="line8">8 |</a> ** First Edition: 1991/10/23 **
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<a name="line9">9 |</a> ** **
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<a name="line10">10 |</a> ** Authors: John Furlan, jlf@behere.com **
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<a name="line11">11 |</a> ** Jens Hamisch, jens@Strawberry.COM **
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<a name="line12">12 |</a> ** **
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<a name="line13">13 |</a> ** Description: Switches two modulefiles such that the paths are **
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<a name="line14">14 |</a> ** switched in-place. **
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<a name="line15">15 |</a> ** **
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<a name="line16">16 |</a> ** Exports: ModuleCmd_Switch **
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<a name="line17">17 |</a> ** **
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<a name="line18">18 |</a> ** Notes: **
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<a name="line19">19 |</a> ** **
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<a name="line20">20 |</a> ** ************************************************************************ **
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<a name="line21">21 |</a> ****/
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<a name="line22">22 |</a>
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<a name="line23">23 |</a> /** ** Copyright *********************************************************** **
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<a name="line24">24 |</a> ** **
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<a name="line25">25 |</a> ** Copyright 1991-1994 by John L. Furlan. **
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<a name="line26">26 |</a> ** see LICENSE.GPL, which must be provided, for details **
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<a name="line27">27 |</a> ** **
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<a name="line28">28 |</a> ** ************************************************************************ **/
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<a name="line29">29 |</a>
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<a name="line30">30 |</a> static char Id[] = "@(#)$Id: ModuleCmd_Switch.c.src.html,v 1.6 2006/01/18 05:35:11 rkowen Exp $";
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<a name="line31">31 |</a> static void *UseId[] = { &UseId, Id };
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<a name="line32">32 |</a>
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<a name="line33">33 |</a> /** ************************************************************************ **/
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<a name="line34">34 |</a> /** HEADERS **/
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<a name="line35">35 |</a> /** ************************************************************************ **/
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<a name="line36">36 |</a>
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<a name="line37">37 |</a> #include "modules_def.h"
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<a name="line38">38 |</a>
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<a name="line39">39 |</a> /** ************************************************************************ **/
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<a name="line40">40 |</a> /** LOCAL DATATYPES **/
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<a name="line41">41 |</a> /** ************************************************************************ **/
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<a name="line42">42 |</a>
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<a name="line43">43 |</a> /** not applicable **/
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<a name="line44">44 |</a>
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<a name="line45">45 |</a> /** ************************************************************************ **/
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<a name="line46">46 |</a> /** CONSTANTS **/
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<a name="line47">47 |</a> /** ************************************************************************ **/
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<a name="line48">48 |</a>
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<a name="line49">49 |</a> /** not applicable **/
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<a name="line50">50 |</a>
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<a name="line51">51 |</a> /** ************************************************************************ **/
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<a name="line52">52 |</a> /** MACROS **/
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<a name="line53">53 |</a> /** ************************************************************************ **/
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<a name="line54">54 |</a>
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<a name="line55">55 |</a> /** not applicable **/
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<a name="line56">56 |</a>
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<a name="line57">57 |</a> /** ************************************************************************ **/
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<a name="line58">58 |</a> /** LOCAL DATA **/
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<a name="line59">59 |</a> /** ************************************************************************ **/
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<a name="line60">60 |</a>
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<a name="line61">61 |</a> static char module_name[] = "ModuleCmd_Switch.c"; /** File name of this module **/
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<a name="line62">62 |</a>
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<a name="line63">63 |</a> /** ************************************************************************ **/
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<a name="line64">64 |</a> /** PROTOTYPES **/
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<a name="line65">65 |</a> /** ************************************************************************ **/
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<a name="line66">66 |</a>
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<a name="line67">67 |</a> /** not applicable **/
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<a name="line68">68 |</a>
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<a name="line69">69 |</a>
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<a name="line70">70 |</a> /*++++
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<a name="line71">71 |</a> ** ** Function-Header ***************************************************** **
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<a name="line72">72 |</a> ** **
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<a name="line73">73 |</a> ** Function: ModuleCmd_Switch **
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<a name="line74">74 |</a> ** **
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<a name="line75">75 |</a> ** Description: Execution of the module-command 'switch' **
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<a name="line76">76 |</a> ** **
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<a name="line77">77 |</a> ** First Edition: 1991/10/23 **
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<a name="line78">78 |</a> ** **
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<a name="line79">79 |</a> ** Parameters: Tcl_Interp *interp Attached Tcl Interp. **
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<a name="line80">80 |</a> ** int argc Number of arguments **
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<a name="line81">81 |</a> ** char *argv[] Argument list **
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<a name="line82">82 |</a> ** **
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<a name="line83">83 |</a> ** Result: int TCL_ERROR Failure **
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<a name="line84">84 |</a> ** TCL_OK Successfull operation **
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<a name="line85">85 |</a> ** **
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<a name="line86">86 |</a> ** Attached Globals: g_flags Controlling the callback **
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<a name="line87">87 |</a> ** functions. **
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<a name="line88">88 |</a> ** g_specified_module The module name from the **
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<a name="line89">89 |</a> ** command line. **
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<a name="line90">90 |</a> ** g_current_module The module which is handled **
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<a name="line91">91 |</a> ** by the current command **
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<a name="line92">92 |</a> ** **
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<a name="line93">93 |</a> ** ************************************************************************ **
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<a name="line94">94 |</a> ++++*/
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<a name="line95">95 |</a>
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<a name="line96">96 |</a> int ModuleCmd_Switch( Tcl_Interp *interp,
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<a name="line97">97 |</a> int argc,
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<a name="line98">98 |</a> char *argv[])
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<a name="line99">99 |</a> {
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<a name="line100">100 |</a> char *oldmodule,
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<a name="line101">101 |</a> *newmodule,
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<a name="line102">102 |</a> *realname,
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<a name="line103">103 |</a> *oldfile,
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<a name="line104">104 |</a> *newfile,
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<a name="line105">105 |</a> *oldname,
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<a name="line106">106 |</a> *newname,
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<a name="line107">107 |</a> *oldmodule_buffer = (char *) NULL;
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<a name="line108">108 |</a> int ret_val = TCL_OK;
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<a name="line109">109 |</a>
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<a name="line110">110 |</a> #if WITH_DEBUGGING_MODULECMD
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<a name="line111">111 |</a> fprintf( stderr, "ModuleCmd_Switch(%d):DEBUG: Starting\n", __LINE__);
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<a name="line112">112 |</a> #endif
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<a name="line113">113 |</a> /**
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<a name="line114">114 |</a> ** allocate buffer memory
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<a name="line115">115 |</a> **/
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<a name="line116">116 |</a> if ((char *) NULL == (oldfile = stringer(NULL, MOD_BUFSIZE, NULL)))
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<a name="line117">117 |</a> if( OK != ErrorLogger( ERR_STRING, LOC, NULL))
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<a name="line118">118 |</a> goto unwind0;
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<a name="line119">119 |</a>
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<a name="line120">120 |</a> if ((char *) NULL == (newfile = stringer(NULL, MOD_BUFSIZE, NULL)))
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<a name="line121">121 |</a> if( OK != ErrorLogger( ERR_STRING, LOC, NULL))
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<a name="line122">122 |</a> goto unwind1;
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<a name="line123">123 |</a>
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<a name="line124">124 |</a> if ((char *) NULL == (oldname = stringer(NULL, MOD_BUFSIZE, NULL)))
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<a name="line125">125 |</a> if( OK != ErrorLogger( ERR_STRING, LOC, NULL))
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<a name="line126">126 |</a> goto unwind2;
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<a name="line127">127 |</a>
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<a name="line128">128 |</a> if ((char *) NULL == (newname = stringer(NULL, MOD_BUFSIZE, NULL)))
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<a name="line129">129 |</a> if( OK != ErrorLogger( ERR_STRING, LOC, NULL))
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<a name="line130">130 |</a> goto unwind3;
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<a name="line131">131 |</a>
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<a name="line132">132 |</a> /**
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<a name="line133">133 |</a> ** Parameter check. the required syntax is:
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<a name="line134">134 |</a> ** module switch [ <old> ] <new>
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<a name="line135">135 |</a> ** If <old> is not specified, then the pathname of <new> is assumed.
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<a name="line136">136 |</a> **/
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<a name="line137">137 |</a>
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<a name="line138">138 |</a> if( argc == 1) {
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<a name="line139">139 |</a> newmodule = argv[0];
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<a name="line140">140 |</a> if((char *) NULL == (oldmodule_buffer = stringer(NULL,0,newmodule,NULL)))
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<a name="line141">141 |</a> if( OK != ErrorLogger( ERR_STRING, LOC, NULL))
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<a name="line142">142 |</a> goto unwind4;
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<a name="line143">143 |</a>
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<a name="line144">144 |</a> /* starting from the end of the module name, find the first
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<a name="line145">145 |</a> * forward slash and replace with null
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<a name="line146">146 |</a> */
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<a name="line147">147 |</a> if ((oldmodule = strrchr(oldmodule_buffer, '/'))) {
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<a name="line148">148 |</a> *oldmodule = 0;
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<a name="line149">149 |</a> }
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<a name="line150">150 |</a> oldmodule = oldmodule_buffer;
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<a name="line151">151 |</a> } else if( argc == 2) {
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<a name="line152">152 |</a> oldmodule = argv[0];
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<a name="line153">153 |</a> newmodule = argv[1];
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<a name="line154">154 |</a> } else {
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<a name="line155">155 |</a> if( OK != ErrorLogger( ERR_USAGE, LOC, "switch oldmodule newmodule",
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<a name="line156">156 |</a> NULL))
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<a name="line157">157 |</a> return( TCL_ERROR); /** ------- EXIT (FAILURE) --------> **/
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<a name="line158">158 |</a> }
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<a name="line159">159 |</a>
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<a name="line160">160 |</a>
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<a name="line161">161 |</a> /**
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<a name="line162">162 |</a> ** Set the name of the module specified on the command line
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<a name="line163">163 |</a> **/
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<a name="line164">164 |</a>
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<a name="line165">165 |</a> g_specified_module = oldmodule;
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<a name="line166">166 |</a>
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<a name="line167">167 |</a> /**
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<a name="line168">168 |</a> ** First try to find a match for the modulefile out of the LOADEDMODULES.
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<a name="line169">169 |</a> **/
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<a name="line170">170 |</a>
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<a name="line171">171 |</a> if( !IsLoaded( interp, oldmodule, &realname, oldfile))
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<a name="line172">172 |</a> if( OK != ErrorLogger( ERR_NOTLOADED, LOC, oldmodule, NULL))
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<a name="line173">173 |</a> goto unwind4;
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<a name="line174">174 |</a>
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<a name="line175">175 |</a> /**
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<a name="line176">176 |</a> ** If we have another name to try, try finding it on disk.
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<a name="line177">177 |</a> **/
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<a name="line178">178 |</a>
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<a name="line179">179 |</a> if( realname)
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<a name="line180">180 |</a> ret_val = Locate_ModuleFile( interp, realname, oldname, oldfile);
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<a name="line181">181 |</a>
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<a name="line182">182 |</a> /**
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<a name="line183">183 |</a> ** If we've made it this far without finding a file, then look using the
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<a name="line184">184 |</a> ** exact name the user gave me -- i.e. the old method.
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<a name="line185">185 |</a> **/
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<a name="line186">186 |</a>
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<a name="line187">187 |</a> if( ret_val == TCL_ERROR) {
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<a name="line188">188 |</a>
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<a name="line189">189 |</a> if( TCL_ERROR == (ret_val = Locate_ModuleFile( interp, oldmodule,
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<a name="line190">190 |</a> oldname, oldfile)))
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<a name="line191">191 |</a> if( OK != ErrorLogger( ERR_LOCATE, LOC, oldmodule, NULL))
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<a name="line192">192 |</a> goto unwind4;
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<a name="line193">193 |</a>
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<a name="line194">194 |</a> /**
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<a name="line195">195 |</a> ** OK, this one is known. Is it loaded, too?
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<a name="line196">196 |</a> **/
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<a name="line197">197 |</a>
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<a name="line198">198 |</a> if( !IsLoaded( interp, oldname, NULL, oldfile))
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<a name="line199">199 |</a> if( OK != ErrorLogger( ERR_NOTLOADED, LOC, oldmodule, NULL))
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<a name="line200">200 |</a> goto unwind4;
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<a name="line201">201 |</a> }
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<a name="line202">202 |</a>
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<a name="line203">203 |</a> /**
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<a name="line204">204 |</a> ** Set the name of the module specified on the command line
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<a name="line205">205 |</a> **/
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<a name="line206">206 |</a>
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<a name="line207">207 |</a> g_specified_module = newmodule;
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<a name="line208">208 |</a>
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<a name="line209">209 |</a> /**
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<a name="line210">210 |</a> ** Now try to find the new file to swap with.
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<a name="line211">211 |</a> **/
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<a name="line212">212 |</a>
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<a name="line213">213 |</a> if( TCL_ERROR == (ret_val = Locate_ModuleFile( interp, newmodule, newname,
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<a name="line214">214 |</a> newfile)))
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<a name="line215">215 |</a> if( OK != ErrorLogger( ERR_LOCATE, LOC, newmodule, NULL))
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<a name="line216">216 |</a> goto unwind4;
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<a name="line217">217 |</a>
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<a name="line218">218 |</a> ErrorLogger( NO_ERR_VERBOSE, LOC, "Switching '$1' to '$2'", oldmodule,
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<a name="line219">219 |</a> newmodule, NULL);
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<a name="line220">220 |</a>
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<a name="line221">221 |</a> /**
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<a name="line222">222 |</a> ** We'll remove the current modulefile with the SWITCH1 state set.
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<a name="line223">223 |</a> ** This means that instead of really removing the paths, markers will
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<a name="line224">224 |</a> ** be put in its place for later use.
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<a name="line225">225 |</a> **/
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<a name="line226">226 |</a>
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<a name="line227">227 |</a> g_flags |= (M_REMOVE | M_SWSTATE1);
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<a name="line228">228 |</a>
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<a name="line229">229 |</a> g_specified_module = oldmodule;
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<a name="line230">230 |</a> g_current_module = oldname;
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<a name="line231">231 |</a> if( Read_Modulefile( interp, oldfile) == 0)
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<a name="line232">232 |</a> Update_LoadedList( interp, oldname, oldfile);
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<a name="line233">233 |</a> else {
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<a name="line234">234 |</a> ErrorLogger( NO_ERR_VERBOSE, LOC, "failed", NULL);
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<a name="line235">235 |</a> goto unwind4;
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<a name="line236">236 |</a> }
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<a name="line237">237 |</a>
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<a name="line238">238 |</a> g_flags &= ~(M_REMOVE | M_SWSTATE1);
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<a name="line239">239 |</a>
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<a name="line240">240 |</a> /**
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<a name="line241">241 |</a> ** Move on to state SWITCH2. This loads the modulefile at the append
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<a name="line242">242 |</a> ** and prepend markers.
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<a name="line243">243 |</a> **/
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<a name="line244">244 |</a>
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<a name="line245">245 |</a> g_flags |= M_SWSTATE2;
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<a name="line246">246 |</a>
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<a name="line247">247 |</a> g_specified_module = newmodule;
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<a name="line248">248 |</a> g_current_module = newname;
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<a name="line249">249 |</a> if( Read_Modulefile( interp, newfile) == 0)
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<a name="line250">250 |</a> Update_LoadedList( interp, newname, newfile);
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<a name="line251">251 |</a> else {
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<a name="line252">252 |</a> ErrorLogger( NO_ERR_VERBOSE, LOC, "failed", NULL);
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<a name="line253">253 |</a> goto unwind4;
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<a name="line254">254 |</a> }
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<a name="line255">255 |</a>
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<a name="line256">256 |</a> g_flags &= ~M_SWSTATE2;
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<a name="line257">257 |</a>
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<a name="line258">258 |</a> /**
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<a name="line259">259 |</a> ** This actually unsets environment variables and gets rid of the
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<a name="line260">260 |</a> ** markers.
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<a name="line261">261 |</a> **/
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<a name="line262">262 |</a>
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<a name="line263">263 |</a> g_flags |= (M_REMOVE | M_SWSTATE3);
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<a name="line264">264 |</a>
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<a name="line265">265 |</a> g_specified_module = oldmodule;
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<a name="line266">266 |</a> g_current_module = oldname;
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<a name="line267">267 |</a> if( Read_Modulefile( interp, oldfile) == 0)
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<a name="line268">268 |</a> Update_LoadedList( interp, newname, newfile);
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<a name="line269">269 |</a> else {
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<a name="line270">270 |</a> ErrorLogger( NO_ERR_VERBOSE, LOC, "failed", NULL);
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<a name="line271">271 |</a> goto unwind4;
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<a name="line272">272 |</a> }
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<a name="line273">273 |</a>
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<a name="line274">274 |</a> /**
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<a name="line275">275 |</a> ** Return on success
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<a name="line276">276 |</a> **/
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<a name="line277">277 |</a>
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<a name="line278">278 |</a> ErrorLogger( NO_ERR_VERBOSE, LOC, "done", NULL);
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<a name="line279">279 |</a>
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<a name="line280">280 |</a> #if WITH_DEBUGGING_MODULECMD
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<a name="line281">281 |</a> fprintf( stderr, "ModuleCmd_Switch(%d):DEBUG: End\n", __LINE__);
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<a name="line282">282 |</a> #endif
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<a name="line283">283 |</a> /**
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<a name="line284">284 |</a> ** free space
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<a name="line285">285 |</a> ** assume don't need what's pointed to by g_current_module
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<a name="line286">286 |</a> ** and g_specified_module
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<a name="line287">287 |</a> **/
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<a name="line288">288 |</a> null_free((void *) &newname);
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<a name="line289">289 |</a> null_free((void *) &oldname);
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<a name="line290">290 |</a> null_free((void *) &newfile);
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<a name="line291">291 |</a> null_free((void *) &oldfile);
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<a name="line292">292 |</a>
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<a name="line293">293 |</a> return( TCL_OK); /** ------- EXIT (SUCCESS) --------> **/
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<a name="line294">294 |</a>
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<a name="line295">295 |</a> unwind4:
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<a name="line296">296 |</a> if (oldmodule == oldmodule_buffer)
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<a name="line297">297 |</a> null_free((void *) &oldmodule);
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<a name="line298">298 |</a> null_free((void *) &newname);
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<a name="line299">299 |</a> unwind3:
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<a name="line300">300 |</a> null_free((void *) &oldname);
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<a name="line301">301 |</a> unwind2:
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<a name="line302">302 |</a> null_free((void *) &newfile);
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<a name="line303">303 |</a> unwind1:
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<a name="line304">304 |</a> null_free((void *) &oldfile);
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<a name="line305">305 |</a> unwind0:
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<a name="line306">306 |</a> return( TCL_ERROR); /** ------- EXIT (FAILURE) --------> **/
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<a name="line307">307 |</a>
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<a name="line308">308 |</a> } /** End of 'ModuleCmd_Switch' **/
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<a name="line309">309 |</a>
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</pre>
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