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Fix MinGW-Bug [2445962]; (reported by Keishi Suenaga).

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This commit is contained in:
Keith Marshall 2009-01-04 17:35:36 +00:00
parent 952783ba77
commit f1170e02f2
3 changed files with 51 additions and 2 deletions
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12
winsup/mingw/ChangeLog
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@ -1,3 +1,15 @@
2009-01-04 Keith Marshall <keithmarshall@users.sourceforge.net>
Fix MinGW-Bug [2445962]; (reported by Keishi Suenaga).
Also add tentative support for BSD specific `optreset' feature.
* include/getopt.h (optreset) [_BSD_SOURCE]: Define; map it to...
(__mingw_optreset): ...this new global variable.
* mingwex/getopt.c (__mingw_optreset): Instantiate it...
(getopt_parse) [optind < 1]: ...make it true; use it to reset argument
parsing context.
2008-12-31 Keith Marshall <keithmarshall@users.sourceforge.net>
Partial fix for MinGW-Bug [2457778]: (Reported by Sisyphus).

11
winsup/mingw/include/getopt.h
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@ -45,6 +45,17 @@ extern char *optarg; /* pointer to argument of current option */
extern int getopt( int, char * const [], const char * );
#ifdef _BSD_SOURCE
/*
* BSD adds the non-standard `optreset' feature, for reinitialisation
* of `getopt' parsing. We support this feature, for applications which
* proclaim their BSD heritage, before including this header; however,
* to maintain portability, developers are advised to avoid it.
*/
# define optreset __mingw_optreset
extern int optreset;
#endif
#ifdef __cplusplus
}
#endif

30
winsup/mingw/mingwex/getopt.c
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@ -87,6 +87,14 @@ enum
int optopt = getopt_unknown; /* return value for option being evaluated */
/* Some BSD applications expect to be able to reinitialise `getopt' parsing
* by setting a global variable called `optreset'. We provide an obfuscated
* API, which allows applications to emulate this brain damage; however, any
* use of this is non-portable, and is strongly discouraged.
*/
#define optreset __mingw_optreset
int optreset = 0;
static __inline__
int getopt_missing_arg( const CHAR *optstring )
{
@ -313,7 +321,7 @@ int getopt_parse( int mode, getopt_std_args, ... )
static const CHAR *nextchar = NULL;
static int optmark = 0;
if( optind < optbase )
if( (optreset |= (optind < 1)) || (optind < optbase) )
{
/* POSIX does not prescribe any definitive mechanism for restarting
* a `getopt' scan, but some applications may require such capability.
@ -325,7 +333,25 @@ int getopt_parse( int mode, getopt_std_args, ... )
* adjusting all of the internal placeholders to one less than the
* adjusted `optind' value, (but never to less than zero).
*/
optmark = optbase = argind = (optind > 0) ? optind - 1 : 0;
if( optreset )
{
/* User has explicitly requested reinitialisation...
* We need to reset `optind' to it's normal initial value of 1,
* to avoid a potential infinitely recursive loop; by doing this
* up front, we also ensure that the remaining placeholders will
* be correctly reinitialised to no less than zero.
*/
optind = 1;
/* We also need to clear the `optreset' request...
*/
optreset = 0;
}
/* Now, we may safely reinitialise the internal placeholders, to
* one less than `optind', without fear of making them negative.
*/
optmark = optbase = argind = optind - 1;
nextchar = NULL;
}