| Current Path : /usr/src/contrib/ntp/sntp/libopts/ |
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| Current File : //usr/src/contrib/ntp/sntp/libopts/load.c |
/*
* $Id: load.c,v 4.20 2007/02/04 22:17:39 bkorb Exp $
* Time-stamp: "2007-02-04 11:54:57 bkorb"
*
* This file contains the routines that deal with processing text strings
* for options, either from a NUL-terminated string passed in or from an
* rc/ini file.
*/
/*
* Automated Options copyright 1992-2007 Bruce Korb
*
* Automated Options is free software.
* You may redistribute it and/or modify it under the terms of the
* GNU General Public License, as published by the Free Software
* Foundation; either version 2, or (at your option) any later version.
*
* Automated Options is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Automated Options. See the file "COPYING". If not,
* write to: The Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
* As a special exception, Bruce Korb gives permission for additional
* uses of the text contained in his release of AutoOpts.
*
* The exception is that, if you link the AutoOpts library with other
* files to produce an executable, this does not by itself cause the
* resulting executable to be covered by the GNU General Public License.
* Your use of that executable is in no way restricted on account of
* linking the AutoOpts library code into it.
*
* This exception does not however invalidate any other reasons why
* the executable file might be covered by the GNU General Public License.
*
* This exception applies only to the code released by Bruce Korb under
* the name AutoOpts. If you copy code from other sources under the
* General Public License into a copy of AutoOpts, as the General Public
* License permits, the exception does not apply to the code that you add
* in this way. To avoid misleading anyone as to the status of such
* modified files, you must delete this exception notice from them.
*
* If you write modifications of your own for AutoOpts, it is your choice
* whether to permit this exception to apply to your modifications.
* If you do not wish that, delete this exception notice.
*/
tOptionLoadMode option_load_mode = OPTION_LOAD_UNCOOKED;
/* = = = START-STATIC-FORWARD = = = */
/* static forward declarations maintained by :mkfwd */
static ag_bool
insertProgramPath(
char* pzBuf,
int bufSize,
tCC* pzName,
tCC* pzProgPath );
static ag_bool
insertEnvVal(
char* pzBuf,
int bufSize,
tCC* pzName,
tCC* pzProgPath );
static char*
assembleArgValue( char* pzTxt, tOptionLoadMode mode );
/* = = = END-STATIC-FORWARD = = = */
/*=export_func optionMakePath
* private:
*
* what: translate and construct a path
* arg: + char* + pzBuf + The result buffer +
* arg: + int + bufSize + The size of this buffer +
* arg: + char const* + pzName + The input name +
* arg: + char const* + pzProgPath + The full path of the current program +
*
* ret-type: ag_bool
* ret-desc: AG_TRUE if the name was handled, otherwise AG_FALSE.
* If the name does not start with ``$'', then it is handled
* simply by copying the input name to the output buffer and
* resolving the name with either @code{canonicalize_file_name(3GLIBC)}
* or @code{realpath(3C)}.
*
* doc:
*
* This routine will copy the @code{pzName} input name into the @code{pzBuf}
* output buffer, carefully not exceeding @code{bufSize} bytes. If the
* first character of the input name is a @code{'$'} character, then there
* is special handling:
* @*
* @code{$$} is replaced with the directory name of the @code{pzProgPath},
* searching @code{$PATH} if necessary.
* @*
* @code{$@} is replaced with the AutoGen package data installation directory
* (aka @code{pkgdatadir}).
* @*
* @code{$NAME} is replaced by the contents of the @code{NAME} environment
* variable. If not found, the search fails.
*
* Please note: both @code{$$} and @code{$NAME} must be at the start of the
* @code{pzName} string and must either be the entire string or be followed
* by the @code{'/'} (backslash on windows) character.
*
* err: @code{AG_FALSE} is returned if:
* @*
* @bullet{} The input name exceeds @code{bufSize} bytes.
* @*
* @bullet{} @code{$$}, @code{$@@} or @code{$NAME} is not the full string
* and the next character is not '/'.
* @*
* @bullet{} libopts was built without PKGDATADIR defined and @code{$@@}
* was specified.
* @*
* @bullet{} @code{NAME} is not a known environment variable
* @*
* @bullet{} @code{canonicalize_file_name} or @code{realpath} return
* errors (cannot resolve the resulting path).
=*/
ag_bool
optionMakePath(
char* pzBuf,
int bufSize,
tCC* pzName,
tCC* pzProgPath )
{
size_t name_len = strlen( pzName );
# ifndef PKGDATADIR
# define PKGDATADIR ""
# endif
tSCC pkgdatadir[] = PKGDATADIR;
ag_bool res = AG_TRUE;
if (bufSize <= name_len)
return AG_FALSE;
/*
* IF not an environment variable, just copy the data
*/
if (*pzName != '$') {
tCC* pzS = pzName;
char* pzD = pzBuf;
int ct = bufSize;
for (;;) {
if ( (*(pzD++) = *(pzS++)) == NUL)
break;
if (--ct <= 0)
return AG_FALSE;
}
}
/*
* IF the name starts with "$$", then it must be "$$" or
* it must start with "$$/". In either event, replace the "$$"
* with the path to the executable and append a "/" character.
*/
else switch (pzName[1]) {
case NUL:
return AG_FALSE;
case '$':
res = insertProgramPath( pzBuf, bufSize, pzName, pzProgPath );
break;
case '@':
if (pkgdatadir[0] == NUL)
return AG_FALSE;
if (name_len + sizeof (pkgdatadir) > bufSize)
return AG_FALSE;
strcpy(pzBuf, pkgdatadir);
strcpy(pzBuf + sizeof(pkgdatadir) - 1, pzName + 2);
break;
default:
res = insertEnvVal( pzBuf, bufSize, pzName, pzProgPath );
}
if (! res)
return AG_FALSE;
#if defined(HAVE_CANONICALIZE_FILE_NAME)
{
char* pz = canonicalize_file_name(pzBuf);
if (pz == NULL)
return AG_FALSE;
if (strlen(pz) < bufSize)
strcpy(pzBuf, pz);
free(pz);
}
#elif defined(HAVE_REALPATH)
{
char z[ PATH_MAX+1 ];
if (realpath( pzBuf, z ) == NULL)
return AG_FALSE;
if (strlen(z) < bufSize)
strcpy( pzBuf, z );
}
#endif
return AG_TRUE;
}
static ag_bool
insertProgramPath(
char* pzBuf,
int bufSize,
tCC* pzName,
tCC* pzProgPath )
{
tCC* pzPath;
tCC* pz;
int skip = 2;
switch (pzName[2]) {
case DIRCH:
skip = 3;
case NUL:
break;
default:
return AG_FALSE;
}
/*
* See if the path is included in the program name.
* If it is, we're done. Otherwise, we have to hunt
* for the program using "pathfind".
*/
if (strchr( pzProgPath, DIRCH ) != NULL)
pzPath = pzProgPath;
else {
pzPath = pathfind( getenv( "PATH" ), (char*)pzProgPath, "rx" );
if (pzPath == NULL)
return AG_FALSE;
}
pz = strrchr( pzPath, DIRCH );
/*
* IF we cannot find a directory name separator,
* THEN we do not have a path name to our executable file.
*/
if (pz == NULL)
return AG_FALSE;
pzName += skip;
/*
* Concatenate the file name to the end of the executable path.
* The result may be either a file or a directory.
*/
if ((pz - pzPath)+1 + strlen(pzName) >= bufSize)
return AG_FALSE;
memcpy( pzBuf, pzPath, (size_t)((pz - pzPath)+1) );
strcpy( pzBuf + (pz - pzPath) + 1, pzName );
/*
* If the "pzPath" path was gotten from "pathfind()", then it was
* allocated and we need to deallocate it.
*/
if (pzPath != pzProgPath)
free( (void*)pzPath );
return AG_TRUE;
}
static ag_bool
insertEnvVal(
char* pzBuf,
int bufSize,
tCC* pzName,
tCC* pzProgPath )
{
char* pzDir = pzBuf;
for (;;) {
int ch = (int)*++pzName;
if (! ISNAMECHAR( ch ))
break;
*(pzDir++) = (char)ch;
}
if (pzDir == pzBuf)
return AG_FALSE;
*pzDir = NUL;
pzDir = getenv( pzBuf );
/*
* Environment value not found -- skip the home list entry
*/
if (pzDir == NULL)
return AG_FALSE;
if (strlen( pzDir ) + 1 + strlen( pzName ) >= bufSize)
return AG_FALSE;
sprintf( pzBuf, "%s%s", pzDir, pzName );
return AG_TRUE;
}
LOCAL void
mungeString( char* pzTxt, tOptionLoadMode mode )
{
char* pzE;
if (mode == OPTION_LOAD_KEEP)
return;
if (isspace( (int)*pzTxt )) {
char* pzS = pzTxt;
char* pzD = pzTxt;
while (isspace( (int)*++pzS )) ;
while ((*(pzD++) = *(pzS++)) != NUL) ;
pzE = pzD-1;
} else
pzE = pzTxt + strlen( pzTxt );
while ((pzE > pzTxt) && isspace( (int)pzE[-1] )) pzE--;
*pzE = NUL;
if (mode == OPTION_LOAD_UNCOOKED)
return;
switch (*pzTxt) {
default: return;
case '"':
case '\'': break;
}
switch (pzE[-1]) {
default: return;
case '"':
case '\'': break;
}
(void)ao_string_cook( pzTxt, NULL );
}
static char*
assembleArgValue( char* pzTxt, tOptionLoadMode mode )
{
tSCC zBrk[] = " \t:=";
char* pzEnd = strpbrk( pzTxt, zBrk );
int space_break;
/*
* Not having an argument to a configurable name is okay.
*/
if (pzEnd == NULL)
return pzTxt + strlen(pzTxt);
/*
* If we are keeping all whitespace, then the modevalue starts with the
* character that follows the end of the configurable name, regardless
* of which character caused it.
*/
if (mode == OPTION_LOAD_KEEP) {
*(pzEnd++) = NUL;
return pzEnd;
}
/*
* If the name ended on a white space character, remember that
* because we'll have to skip over an immediately following ':' or '='
* (and the white space following *that*).
*/
space_break = isspace((int)*pzEnd);
*(pzEnd++) = NUL;
while (isspace((int)*pzEnd)) pzEnd++;
if (space_break && ((*pzEnd == ':') || (*pzEnd == '=')))
while (isspace((int)*++pzEnd)) ;
return pzEnd;
}
/*
* Load an option from a block of text. The text must start with the
* configurable/option name and be followed by its associated value.
* That value may be processed in any of several ways. See "tOptionLoadMode"
* in autoopts.h.
*/
LOCAL void
loadOptionLine(
tOptions* pOpts,
tOptState* pOS,
char* pzLine,
tDirection direction,
tOptionLoadMode load_mode )
{
while (isspace( (int)*pzLine )) pzLine++;
{
char* pzArg = assembleArgValue( pzLine, load_mode );
if (! SUCCESSFUL( longOptionFind( pOpts, pzLine, pOS )))
return;
if (pOS->flags & OPTST_NO_INIT)
return;
pOS->pzOptArg = pzArg;
}
switch (pOS->flags & (OPTST_IMM|OPTST_DISABLE_IMM)) {
case 0:
/*
* The selected option has no immediate action.
* THEREFORE, if the direction is PRESETTING
* THEN we skip this option.
*/
if (PRESETTING(direction))
return;
break;
case OPTST_IMM:
if (PRESETTING(direction)) {
/*
* We are in the presetting direction with an option we handle
* immediately for enablement, but normally for disablement.
* Therefore, skip if disabled.
*/
if ((pOS->flags & OPTST_DISABLED) == 0)
return;
} else {
/*
* We are in the processing direction with an option we handle
* immediately for enablement, but normally for disablement.
* Therefore, skip if NOT disabled.
*/
if ((pOS->flags & OPTST_DISABLED) != 0)
return;
}
break;
case OPTST_DISABLE_IMM:
if (PRESETTING(direction)) {
/*
* We are in the presetting direction with an option we handle
* immediately for disablement, but normally for disablement.
* Therefore, skip if NOT disabled.
*/
if ((pOS->flags & OPTST_DISABLED) != 0)
return;
} else {
/*
* We are in the processing direction with an option we handle
* immediately for disablement, but normally for disablement.
* Therefore, skip if disabled.
*/
if ((pOS->flags & OPTST_DISABLED) == 0)
return;
}
break;
case OPTST_IMM|OPTST_DISABLE_IMM:
/*
* The selected option is always for immediate action.
* THEREFORE, if the direction is PROCESSING
* THEN we skip this option.
*/
if (PROCESSING(direction))
return;
break;
}
/*
* Fix up the args.
*/
if (OPTST_GET_ARGTYPE(pOS->pOD->fOptState) == OPARG_TYPE_NONE) {
if (*pOS->pzOptArg != NUL)
return;
pOS->pzOptArg = NULL;
} else if (pOS->pOD->fOptState & OPTST_ARG_OPTIONAL) {
if (*pOS->pzOptArg == NUL)
pOS->pzOptArg = NULL;
else {
AGDUPSTR( pOS->pzOptArg, pOS->pzOptArg, "option argument" );
pOS->flags |= OPTST_ALLOC_ARG;
}
} else {
if (*pOS->pzOptArg == NUL)
pOS->pzOptArg = zNil;
else {
AGDUPSTR( pOS->pzOptArg, pOS->pzOptArg, "option argument" );
pOS->flags |= OPTST_ALLOC_ARG;
}
}
{
tOptionLoadMode sv = option_load_mode;
option_load_mode = load_mode;
handleOption( pOpts, pOS );
option_load_mode = sv;
}
}
/*=export_func optionLoadLine
*
* what: process a string for an option name and value
*
* arg: tOptions*, pOpts, program options descriptor
* arg: char const*, pzLine, NUL-terminated text
*
* doc:
*
* This is a client program callable routine for setting options from, for
* example, the contents of a file that they read in. Only one option may
* appear in the text. It will be treated as a normal (non-preset) option.
*
* When passed a pointer to the option struct and a string, it will find
* the option named by the first token on the string and set the option
* argument to the remainder of the string. The caller must NUL terminate
* the string. Any embedded new lines will be included in the option
* argument. If the input looks like one or more quoted strings, then the
* input will be "cooked". The "cooking" is identical to the string
* formation used in AutoGen definition files (@pxref{basic expression}),
* except that you may not use backquotes.
*
* err: Invalid options are silently ignored. Invalid option arguments
* will cause a warning to print, but the function should return.
=*/
void
optionLoadLine(
tOptions* pOpts,
tCC* pzLine )
{
tOptState st = OPTSTATE_INITIALIZER(SET);
char* pz;
AGDUPSTR( pz, pzLine, "user option line" );
loadOptionLine( pOpts, &st, pz, DIRECTION_PROCESS, OPTION_LOAD_COOKED );
AGFREE( pz );
}
/*
* Local Variables:
* mode: C
* c-file-style: "stroustrup"
* indent-tabs-mode: nil
* End:
* end of autoopts/load.c */