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att
GitHub Repository: att/ast
 Path: blob/master/src/lib/libast/comp/execve.c
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/***********************************************************************

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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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*                      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 <[email protected]>                  *

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*                  David Korn <[email protected]>                   *

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*                   Phong Vo <[email protected]>                    *

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*                                                                      *

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***********************************************************************/

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#pragma prototyped

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#include <ast.h>

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#if _lib_execve

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NoN(execve)

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#else

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#include <sig.h>

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#include <wait.h>

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#include <error.h>

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static pid_t		childpid;

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static void

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execsig(int sig)

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{

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	kill(childpid, sig);

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	signal(sig, execsig);

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}

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#if defined(__EXPORT__)

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#define extern	__EXPORT__

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#endif

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extern int

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execve(const char* path, char* const argv[], char* const arge[])

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{

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	int	status;

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	if ((childpid = spawnve(path, argv, arge)) < 0)

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		return(-1);

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	for (status = 0; status < 64; status++)

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		signal(status, execsig);

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	while (waitpid(childpid, &status, 0) == -1)

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		if (errno != EINTR) return(-1);

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	if (WIFSIGNALED(status))

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	{

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		signal(WTERMSIG(status), SIG_DFL);

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		kill(getpid(), WTERMSIG(status));

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		pause();

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	}

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	else status = WEXITSTATUS(status);

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	exit(status);

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}

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#endif

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