242 lines
6.8 KiB
C
242 lines
6.8 KiB
C
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/*
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* $Id: environment.c,v 4.21 2009/08/01 17:43:06 bkorb Exp $
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* Time-stamp: "2009-07-20 20:12:24 bkorb"
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*
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* This file contains all of the routines that must be linked into
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* an executable to use the generated option processing. The optional
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* routines are in separately compiled modules so that they will not
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* necessarily be linked in.
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*
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* This file is part of AutoOpts, a companion to AutoGen.
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* AutoOpts is free software.
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* AutoOpts is copyright (c) 1992-2009 by Bruce Korb - all rights reserved
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*
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* AutoOpts is available under any one of two licenses. The license
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* in use must be one of these two and the choice is under the control
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* of the user of the license.
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*
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* The GNU Lesser General Public License, version 3 or later
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* See the files "COPYING.lgplv3" and "COPYING.gplv3"
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*
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* The Modified Berkeley Software Distribution License
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* See the file "COPYING.mbsd"
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*
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* These files have the following md5sums:
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*
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* 43b91e8ca915626ed3818ffb1b71248b pkg/libopts/COPYING.gplv3
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* 06a1a2e4760c90ea5e1dad8dfaac4d39 pkg/libopts/COPYING.lgplv3
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* 66a5cedaf62c4b2637025f049f9b826f pkg/libopts/COPYING.mbsd
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*/
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/* = = = START-STATIC-FORWARD = = = */
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/* static forward declarations maintained by mk-fwd */
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static void
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checkEnvOpt(tOptState * os, char * env_name,
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tOptions* pOpts, teEnvPresetType type);
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/* = = = END-STATIC-FORWARD = = = */
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/*
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* doPrognameEnv - check for preset values from the ${PROGNAME}
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* environment variable. This is accomplished by parsing the text into
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* tokens, temporarily replacing the arg vector and calling
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* doImmediateOpts and/or doRegularOpts.
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*/
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LOCAL void
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doPrognameEnv( tOptions* pOpts, teEnvPresetType type )
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{
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char const* pczOptStr = getenv( pOpts->pzPROGNAME );
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token_list_t* pTL;
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int sv_argc;
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tAoUI sv_flag;
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char** sv_argv;
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/*
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* No such beast? Then bail now.
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*/
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if (pczOptStr == NULL)
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return;
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/*
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* Tokenize the string. If there's nothing of interest, we'll bail
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* here immediately.
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*/
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pTL = ao_string_tokenize( pczOptStr );
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if (pTL == NULL)
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return;
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/*
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* Substitute our $PROGNAME argument list for the real one
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*/
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sv_argc = pOpts->origArgCt;
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sv_argv = pOpts->origArgVect;
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sv_flag = pOpts->fOptSet;
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/*
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* We add a bogus pointer to the start of the list. The program name
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* has already been pulled from "argv", so it won't get dereferenced.
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* The option scanning code will skip the "program name" at the start
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* of this list of tokens, so we accommodate this way ....
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*/
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pOpts->origArgVect = (char**)(pTL->tkn_list - 1);
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pOpts->origArgCt = pTL->tkn_ct + 1;
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pOpts->fOptSet &= ~OPTPROC_ERRSTOP;
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pOpts->curOptIdx = 1;
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pOpts->pzCurOpt = NULL;
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switch (type) {
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case ENV_IMM:
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(void)doImmediateOpts( pOpts );
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break;
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case ENV_ALL:
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(void)doImmediateOpts( pOpts );
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pOpts->curOptIdx = 1;
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pOpts->pzCurOpt = NULL;
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/* FALLTHROUGH */
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case ENV_NON_IMM:
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(void)doRegularOpts( pOpts );
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}
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/*
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* Free up the temporary arg vector and restore the original program args.
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*/
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free( pTL );
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pOpts->origArgVect = sv_argv;
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pOpts->origArgCt = sv_argc;
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pOpts->fOptSet = sv_flag;
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}
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static void
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checkEnvOpt(tOptState * os, char * env_name,
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tOptions* pOpts, teEnvPresetType type)
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{
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os->pzOptArg = getenv( env_name );
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if (os->pzOptArg == NULL)
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return;
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os->flags = OPTST_PRESET | OPTST_ALLOC_ARG | os->pOD->fOptState;
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os->optType = TOPT_UNDEFINED;
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if ( (os->pOD->pz_DisablePfx != NULL)
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&& (streqvcmp( os->pzOptArg, os->pOD->pz_DisablePfx ) == 0)) {
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os->flags |= OPTST_DISABLED;
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os->pzOptArg = NULL;
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}
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switch (type) {
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case ENV_IMM:
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/*
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* Process only immediate actions
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*/
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if (DO_IMMEDIATELY(os->flags))
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break;
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return;
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case ENV_NON_IMM:
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/*
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* Process only NON immediate actions
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*/
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if (DO_NORMALLY(os->flags) || DO_SECOND_TIME(os->flags))
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break;
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return;
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default: /* process everything */
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break;
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}
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/*
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* Make sure the option value string is persistent and consistent.
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*
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* The interpretation of the option value depends
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* on the type of value argument the option takes
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*/
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if (os->pzOptArg != NULL) {
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if (OPTST_GET_ARGTYPE(os->pOD->fOptState) == OPARG_TYPE_NONE) {
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os->pzOptArg = NULL;
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} else if ( (os->pOD->fOptState & OPTST_ARG_OPTIONAL)
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&& (*os->pzOptArg == NUL)) {
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os->pzOptArg = NULL;
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} else if (*os->pzOptArg == NUL) {
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os->pzOptArg = zNil;
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} else {
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AGDUPSTR( os->pzOptArg, os->pzOptArg, "option argument" );
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os->flags |= OPTST_ALLOC_ARG;
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}
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}
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handleOption( pOpts, os );
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}
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/*
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* doEnvPresets - check for preset values from the envrionment
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* This routine should process in all, immediate or normal modes....
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*/
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LOCAL void
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doEnvPresets( tOptions* pOpts, teEnvPresetType type )
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{
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int ct;
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tOptState st;
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char* pzFlagName;
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size_t spaceLeft;
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char zEnvName[ AO_NAME_SIZE ];
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/*
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* Finally, see if we are to look at the environment
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* variables for initial values.
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*/
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if ((pOpts->fOptSet & OPTPROC_ENVIRON) == 0)
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return;
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doPrognameEnv( pOpts, type );
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ct = pOpts->presetOptCt;
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st.pOD = pOpts->pOptDesc;
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pzFlagName = zEnvName
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+ snprintf( zEnvName, sizeof( zEnvName ), "%s_", pOpts->pzPROGNAME );
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spaceLeft = AO_NAME_SIZE - (pzFlagName - zEnvName) - 1;
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for (;ct-- > 0; st.pOD++) {
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/*
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* If presetting is disallowed, then skip this entry
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*/
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if ( ((st.pOD->fOptState & OPTST_NO_INIT) != 0)
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|| (st.pOD->optEquivIndex != NO_EQUIVALENT) )
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continue;
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/*
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* IF there is no such environment variable,
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* THEN skip this entry, too.
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*/
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if (strlen( st.pOD->pz_NAME ) >= spaceLeft)
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continue;
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/*
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* Set up the option state
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*/
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strcpy( pzFlagName, st.pOD->pz_NAME );
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checkEnvOpt(&st, zEnvName, pOpts, type);
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}
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/*
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* Special handling for ${PROGNAME_LOAD_OPTS}
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*/
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if ( (pOpts->specOptIdx.save_opts != NO_EQUIVALENT)
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&& (pOpts->specOptIdx.save_opts != 0)) {
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st.pOD = pOpts->pOptDesc + pOpts->specOptIdx.save_opts + 1;
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strcpy( pzFlagName, st.pOD->pz_NAME );
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checkEnvOpt(&st, zEnvName, pOpts, type);
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}
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}
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/*
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* Local Variables:
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* mode: C
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* c-file-style: "stroustrup"
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* indent-tabs-mode: nil
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* End:
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* end of autoopts/environment.c */
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