522 lines
15 KiB
C
522 lines
15 KiB
C
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/*
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* save.c $Id: save.c,v 4.18 2007/04/15 19:01:18 bkorb Exp $
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* Time-stamp: "2007-04-15 11:11:10 bkorb"
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*
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* This module's routines will take the currently set options and
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* store them into an ".rc" file for re-interpretation the next
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* time the invoking program is run.
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*/
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/*
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* Automated Options copyright 1992-2007 Bruce Korb
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*
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* Automated Options is free software.
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* You may redistribute it and/or modify it under the terms of the
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* GNU General Public License, as published by the Free Software
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* Foundation; either version 2, or (at your option) any later version.
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*
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* Automated Options is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Automated Options. See the file "COPYING". If not,
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* write to: The Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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* As a special exception, Bruce Korb gives permission for additional
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* uses of the text contained in his release of AutoOpts.
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*
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* The exception is that, if you link the AutoOpts library with other
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* files to produce an executable, this does not by itself cause the
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* resulting executable to be covered by the GNU General Public License.
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* Your use of that executable is in no way restricted on account of
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* linking the AutoOpts library code into it.
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*
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* This exception does not however invalidate any other reasons why
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* the executable file might be covered by the GNU General Public License.
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*
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* This exception applies only to the code released by Bruce Korb under
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* the name AutoOpts. If you copy code from other sources under the
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* General Public License into a copy of AutoOpts, as the General Public
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* License permits, the exception does not apply to the code that you add
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* in this way. To avoid misleading anyone as to the status of such
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* modified files, you must delete this exception notice from them.
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*
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* If you write modifications of your own for AutoOpts, it is your choice
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* whether to permit this exception to apply to your modifications.
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* If you do not wish that, delete this exception notice.
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*/
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tSCC zWarn[] = "%s WARNING: cannot save options - ";
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/* = = = START-STATIC-FORWARD = = = */
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/* static forward declarations maintained by :mkfwd */
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static tCC*
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findDirName( tOptions* pOpts, int* p_free );
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static tCC*
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findFileName( tOptions* pOpts, int* p_free_name );
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static void
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printEntry(
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FILE * fp,
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tOptDesc * p,
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tCC* pzLA );
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/* = = = END-STATIC-FORWARD = = = */
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static tCC*
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findDirName( tOptions* pOpts, int* p_free )
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{
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tCC* pzDir;
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if (pOpts->specOptIdx.save_opts == 0)
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return NULL;
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pzDir = pOpts->pOptDesc[ pOpts->specOptIdx.save_opts ].optArg.argString;
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if ((pzDir != NULL) && (*pzDir != NUL))
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return pzDir;
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/*
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* This function only works if there is a directory where
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* we can stash the RC (INI) file.
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*/
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{
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tCC* const* papz = pOpts->papzHomeList;
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if (papz == NULL)
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return NULL;
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while (papz[1] != NULL) papz++;
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pzDir = *papz;
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}
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/*
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* IF it does not require deciphering an env value, then just copy it
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*/
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if (*pzDir != '$')
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return pzDir;
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{
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tCC* pzEndDir = strchr( ++pzDir, DIRCH );
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char* pzFileName;
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char* pzEnv;
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if (pzEndDir != NULL) {
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char z[ AO_NAME_SIZE ];
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if ((pzEndDir - pzDir) > AO_NAME_LIMIT )
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return NULL;
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strncpy( z, pzDir, (size_t)(pzEndDir - pzDir) );
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z[ (pzEndDir - pzDir) ] = NUL;
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pzEnv = getenv( z );
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} else {
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/*
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* Make sure we can get the env value (after stripping off
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* any trailing directory or file names)
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*/
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pzEnv = getenv( pzDir );
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}
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if (pzEnv == NULL) {
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fprintf( stderr, zWarn, pOpts->pzProgName );
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fprintf( stderr, zNotDef, pzDir );
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return NULL;
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}
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if (pzEndDir == NULL)
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return pzEnv;
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{
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size_t sz = strlen( pzEnv ) + strlen( pzEndDir ) + 2;
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pzFileName = (char*)AGALOC( sz, "dir name" );
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}
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if (pzFileName == NULL)
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return NULL;
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*p_free = 1;
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/*
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* Glue together the full name into the allocated memory.
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* FIXME: We lose track of this memory.
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*/
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sprintf( pzFileName, "%s/%s", pzEnv, pzEndDir );
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return pzFileName;
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}
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}
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static tCC*
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findFileName( tOptions* pOpts, int* p_free_name )
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{
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tCC* pzDir;
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struct stat stBuf;
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int free_dir_name = 0;
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pzDir = findDirName( pOpts, &free_dir_name );
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if (pzDir == NULL)
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return NULL;
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/*
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* See if we can find the specified directory. We use a once-only loop
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* structure so we can bail out early.
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*/
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if (stat( pzDir, &stBuf ) != 0) do {
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/*
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* IF we could not, check to see if we got a full
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* path to a file name that has not been created yet.
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*/
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if (errno == ENOENT) {
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char z[AG_PATH_MAX];
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/*
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* Strip off the last component, stat the remaining string and
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* that string must name a directory
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*/
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char* pzDirCh = strrchr( pzDir, DIRCH );
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if (pzDirCh == NULL) {
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stBuf.st_mode = S_IFREG;
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continue; /* bail out of error condition */
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}
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strncpy( z, pzDir, (size_t)(pzDirCh - pzDir));
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z[ pzDirCh - pzDir ] = NUL;
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if ( (stat( z, &stBuf ) == 0)
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&& S_ISDIR( stBuf.st_mode )) {
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/*
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* We found the directory. Restore the file name and
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* mark the full name as a regular file
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*/
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stBuf.st_mode = S_IFREG;
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continue; /* bail out of error condition */
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}
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}
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/*
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* We got a bogus name.
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*/
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fprintf( stderr, zWarn, pOpts->pzProgName );
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fprintf( stderr, zNoStat, errno, strerror( errno ), pzDir );
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if (free_dir_name)
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AGFREE( (void*)pzDir );
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return NULL;
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} while (0);
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/*
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* IF what we found was a directory,
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* THEN tack on the config file name
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*/
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if (S_ISDIR( stBuf.st_mode )) {
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size_t sz = strlen( pzDir ) + strlen( pOpts->pzRcName ) + 2;
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{
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char* pzPath = (char*)AGALOC( sz, "file name" );
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#ifdef HAVE_SNPRINTF
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snprintf( pzPath, sz, "%s/%s", pzDir, pOpts->pzRcName );
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#else
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sprintf( pzPath, "%s/%s", pzDir, pOpts->pzRcName );
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#endif
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if (free_dir_name)
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AGFREE( (void*)pzDir );
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pzDir = pzPath;
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free_dir_name = 1;
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}
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/*
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* IF we cannot stat the object for any reason other than
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* it does not exist, then we bail out
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*/
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if (stat( pzDir, &stBuf ) != 0) {
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if (errno != ENOENT) {
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fprintf( stderr, zWarn, pOpts->pzProgName );
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fprintf( stderr, zNoStat, errno, strerror( errno ),
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pzDir );
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AGFREE( (void*)pzDir );
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return NULL;
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}
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/*
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* It does not exist yet, but it will be a regular file
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*/
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stBuf.st_mode = S_IFREG;
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}
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}
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/*
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* Make sure that whatever we ultimately found, that it either is
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* or will soon be a file.
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*/
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if (! S_ISREG( stBuf.st_mode )) {
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fprintf( stderr, zWarn, pOpts->pzProgName );
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fprintf( stderr, zNotFile, pzDir );
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if (free_dir_name)
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AGFREE( (void*)pzDir );
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return NULL;
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}
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/*
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* Get rid of the old file
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*/
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unlink( pzDir );
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*p_free_name = free_dir_name;
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return pzDir;
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}
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static void
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printEntry(
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FILE * fp,
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tOptDesc * p,
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tCC* pzLA )
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{
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/*
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* There is an argument. Pad the name so values line up.
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* Not disabled *OR* this got equivalenced to another opt,
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* then use current option name.
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* Otherwise, there must be a disablement name.
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*/
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{
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char const * pz;
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if (! DISABLED_OPT(p) || (p->optEquivIndex != NO_EQUIVALENT))
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pz = p->pz_Name;
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else
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pz = p->pz_DisableName;
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fprintf(fp, "%-18s", pz);
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}
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/*
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* IF the option is numeric only,
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* THEN the char pointer is really the number
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*/
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if (OPTST_GET_ARGTYPE(p->fOptState) == OPARG_TYPE_NUMERIC)
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fprintf( fp, " %d\n", (int)(t_word)pzLA );
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/*
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* OTHERWISE, FOR each line of the value text, ...
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*/
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else if (pzLA == NULL)
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fputc( '\n', fp );
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else {
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fputc( ' ', fp ); fputc( ' ', fp );
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for (;;) {
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tCC* pzNl = strchr( pzLA, '\n' );
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/*
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* IF this is the last line
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* THEN bail and print it
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*/
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if (pzNl == NULL)
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break;
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/*
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* Print the continuation and the text from the current line
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*/
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(void)fwrite( pzLA, (size_t)(pzNl - pzLA), (size_t)1, fp );
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pzLA = pzNl+1; /* advance the Last Arg pointer */
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fputs( "\\\n", fp );
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}
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/*
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* Terminate the entry
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*/
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fputs( pzLA, fp );
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fputc( '\n', fp );
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}
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}
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/*=export_func optionSaveFile
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*
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* what: saves the option state to a file
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*
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* arg: tOptions*, pOpts, program options descriptor
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*
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* doc:
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*
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* This routine will save the state of option processing to a file. The name
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* of that file can be specified with the argument to the @code{--save-opts}
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* option, or by appending the @code{rcfile} attribute to the last
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* @code{homerc} attribute. If no @code{rcfile} attribute was specified, it
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* will default to @code{.@i{programname}rc}. If you wish to specify another
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* file, you should invoke the @code{SET_OPT_SAVE_OPTS( @i{filename} )} macro.
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*
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* err:
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*
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* If no @code{homerc} file was specified, this routine will silently return
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* and do nothing. If the output file cannot be created or updated, a message
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* will be printed to @code{stderr} and the routine will return.
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=*/
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void
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optionSaveFile( tOptions* pOpts )
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{
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tOptDesc* pOD;
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int ct;
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FILE* fp;
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{
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int free_name = 0;
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tCC* pzFName = findFileName( pOpts, &free_name );
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if (pzFName == NULL)
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return;
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fp = fopen( pzFName, "w" FOPEN_BINARY_FLAG );
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if (fp == NULL) {
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fprintf( stderr, zWarn, pOpts->pzProgName );
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fprintf( stderr, zNoCreat, errno, strerror( errno ), pzFName );
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if (free_name)
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AGFREE((void*) pzFName );
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return;
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}
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if (free_name)
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AGFREE( (void*)pzFName );
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}
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{
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char const* pz = pOpts->pzUsageTitle;
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fputs( "# ", fp );
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do { fputc( *pz, fp ); } while (*(pz++) != '\n');
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}
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{
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time_t timeVal = time( NULL );
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char* pzTime = ctime( &timeVal );
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fprintf( fp, zPresetFile, pzTime );
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#ifdef HAVE_ALLOCATED_CTIME
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/*
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* The return values for ctime(), localtime(), and gmtime()
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* normally point to static data that is overwritten by each call.
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* The test to detect allocated ctime, so we leak the memory.
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*/
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AGFREE( (void*)pzTime );
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#endif
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}
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/*
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* FOR each of the defined options, ...
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*/
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ct = pOpts->presetOptCt;
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pOD = pOpts->pOptDesc;
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do {
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int arg_state;
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tOptDesc* p;
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/*
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* IF the option has not been defined
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* OR it does not take an initialization value
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* OR it is equivalenced to another option
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* THEN continue (ignore it)
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*/
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if (UNUSED_OPT( pOD ))
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continue;
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if ((pOD->fOptState & (OPTST_NO_INIT|OPTST_DOCUMENT|OPTST_OMITTED))
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!= 0)
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continue;
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if ( (pOD->optEquivIndex != NO_EQUIVALENT)
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&& (pOD->optEquivIndex != pOD->optIndex))
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continue;
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/*
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* Set a temporary pointer to the real option description
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* (i.e. account for equivalencing)
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*/
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p = ((pOD->fOptState & OPTST_EQUIVALENCE) != 0)
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? (pOpts->pOptDesc + pOD->optActualIndex) : pOD;
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/*
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* IF no arguments are allowed
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* THEN just print the name and continue
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*/
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if (OPTST_GET_ARGTYPE(pOD->fOptState) == OPARG_TYPE_NONE) {
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char const * pznm =
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(DISABLED_OPT( p )) ? p->pz_DisableName : p->pz_Name;
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/*
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* If the option was disabled and the disablement name is NULL,
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* then the disablement was caused by aliasing.
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* Use the name as the string to emit.
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*/
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if (pznm == NULL)
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pznm = p->pz_Name;
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fprintf(fp, "%s\n", pznm);
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continue;
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}
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arg_state = OPTST_GET_ARGTYPE(p->fOptState);
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switch (arg_state) {
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case 0:
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case OPARG_TYPE_NUMERIC:
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printEntry( fp, p, (void*)(p->optArg.argInt));
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break;
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case OPARG_TYPE_STRING:
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if (p->fOptState & OPTST_STACKED) {
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tArgList* pAL = (tArgList*)p->optCookie;
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int uct = pAL->useCt;
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tCC** ppz = pAL->apzArgs;
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/*
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* Disallow multiple copies of disabled options.
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*/
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if (uct > 1)
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p->fOptState &= ~OPTST_DISABLED;
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while (uct-- > 0)
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printEntry( fp, p, *(ppz++) );
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} else {
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printEntry( fp, p, p->optArg.argString );
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}
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break;
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case OPARG_TYPE_ENUMERATION:
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case OPARG_TYPE_MEMBERSHIP:
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{
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uintptr_t val = p->optArg.argEnum;
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/*
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* This is a magic incantation that will convert the
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* bit flag values back into a string suitable for printing.
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*/
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(*(p->pOptProc))( (tOptions*)2UL, p );
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printEntry( fp, p, (void*)(p->optArg.argString));
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if ( (p->optArg.argString != NULL)
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&& (arg_state != OPARG_TYPE_ENUMERATION)) {
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/*
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* set membership strings get allocated
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*/
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AGFREE( (void*)p->optArg.argString );
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p->fOptState &= ~OPTST_ALLOC_ARG;
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}
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p->optArg.argEnum = val;
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break;
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}
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case OPARG_TYPE_BOOLEAN:
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printEntry( fp, p, p->optArg.argBool ? "true" : "false" );
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break;
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default:
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break; /* cannot handle - skip it */
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}
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} while ( (pOD++), (--ct > 0));
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fclose( fp );
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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/save.c */
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