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cde/src/lib/libast/comp/resolvepath.c
Martijn Dekker 3de4da5afb Remove Microsoft/Cygwin import/export nonsense
Windows/Cygwin requires onerous special handling and the definition
of additional _imp__* symbols to import/export symbols between
dynamically linked binaries. Its support in AST used a lot of
macros and code obfuscation. In the features/common test for this,
AT&T called this the "Microsoft import/export nonsense".

They're right, it's nonsense. Somehow, Microsoft's POSIX layer,
SFU/Interix, always managed without it. No one has time to maintain
this (especially considering how incredibly sluggish Cygwin is).
And in fact, it had already fallen victim to bit rot; I confirmed
this in my early experiments with reintroducing dynamic library
support. No one has time to fix it, either.

So, my apologies to any Cygwin fans; ksh 93u+m will never support
dynamically loadable built-ins on Cygwin, even when I do manage to
reintroduce dynamic linking properly.
2022-07-21 23:27:37 +02:00

68 lines
2.3 KiB
C

/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1985-2011 AT&T Intellectual Property *
* Copyright (c) 2020-2022 Contributors to ksh 93u+m *
* and is licensed under the *
* Eclipse Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* http://www.eclipse.org/org/documents/epl-v10.html *
* (with md5 checksum b35adb5213ca9657e911e9befb180842) *
* *
* Information and Software Systems Research *
* AT&T Research *
* Florham Park NJ *
* *
* Glenn Fowler <gsf@research.att.com> *
* David Korn <dgk@research.att.com> *
* Phong Vo <kpv@research.att.com> *
* *
***********************************************************************/
/*
* resolvepath implementation
*/
#define resolvepath ______resolvepath
#include <ast.h>
#include <error.h>
#undef resolvepath
#undef _def_map_ast
#include <ast_map.h>
#undef _AST_API_H
#include <ast_api.h>
extern int
resolvepath(const char* file, char* path, size_t size)
{
register char* s;
register int n;
register int r;
r = *file != '/';
n = strlen(file) + r + 1;
if (n >= size)
{
#ifdef ENAMETOOLONG
errno = ENAMETOOLONG;
#else
errno = ENOMEM;
#endif
return 0;
}
if (!r)
s = path;
else if (!getcwd(path, size - n))
return 0;
else
{
s = path + strlen(path);
*s++ = '/';
}
strlcpy(s, file, size - (s - path));
return (s = pathcanon(path, size, PATH_PHYSICAL|PATH_DOTDOT|PATH_EXISTS)) ? (s - path) : -1;
}