mirror of
git://git.code.sf.net/p/cdesktopenv/code
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3de4da5afb
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.
70 lines
2.4 KiB
C
70 lines
2.4 KiB
C
/***********************************************************************
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* *
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* This software is part of the ast package *
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* Copyright (c) 1985-2011 AT&T Intellectual Property *
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* Copyright (c) 2020-2022 Contributors to ksh 93u+m *
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* and is licensed under the *
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* Eclipse Public License, Version 1.0 *
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* by AT&T Intellectual Property *
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* *
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* A copy of the License is available at *
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* http://www.eclipse.org/org/documents/epl-v10.html *
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* (with md5 checksum b35adb5213ca9657e911e9befb180842) *
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* *
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* Information and Software Systems Research *
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* AT&T Research *
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* Florham Park NJ *
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* *
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* Glenn Fowler <gsf@research.att.com> *
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* David Korn <dgk@research.att.com> *
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* Phong Vo <kpv@research.att.com> *
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* *
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***********************************************************************/
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#include <ast_lib.h>
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#if _lib_execvpe
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#include <ast.h>
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NoN(execvpe)
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#else
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#include <ast.h>
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#include <errno.h>
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extern int
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execvpe(const char* name, char* const argv[], char* const envv[])
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{
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register const char* path = name;
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char buffer[PATH_MAX];
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if (*path != '/' && !(path = pathpath(name, NULL, PATH_REGULAR|PATH_EXECUTE, buffer, sizeof(buffer))))
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path = name;
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execve(path, argv, envv);
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if (errno == ENOEXEC)
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{
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register char** newargv;
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register char** ov;
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register char** nv;
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for (ov = (char**)argv; *ov++;);
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if (newargv = newof(0, char*, ov + 1 - (char**)argv, 0))
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{
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nv = newargv;
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*nv++ = "sh";
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*nv++ = (char*)path;
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ov = (char**)argv;
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while (*nv++ = *++ov);
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path = pathshell();
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execve(path, newargv, envv);
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free(newargv);
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}
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else
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errno = ENOMEM;
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}
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return -1;
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}
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#endif
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