Imported Upstream version 93u+upstream

1 files changed, 78 insertions, 0 deletions

diff --git a/src/lib/libast/comp/execvpe.c b/src/lib/libast/comp/execvpe.c
new file mode 100644
index 0000000..c711c50
--- /dev/null
+++ b/src/lib/libast/comp/execvpe.c
@@ -0,0 +1,78 @@
+/***********************************************************************
+*                                                                      *
+*               This software is part of the ast package               *
+*          Copyright (c) 1985-2011 AT&T Intellectual Property          *
+*                      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>                    *
+*                                                                      *
+***********************************************************************/
+#pragma prototyped
+
+#include <ast_lib.h>
+
+#if _lib_execvpe
+
+#include <ast.h>
+
+NoN(execvpe)
+
+#else
+
+#if defined(__EXPORT__)
+__EXPORT__ int execvpe(const char*, char* const[], char* const[]);
+#endif
+
+#include <ast.h>
+#include <errno.h>
+
+#if defined(__EXPORT__)
+#define extern	__EXPORT__
+#endif
+
+extern int
+execvpe(const char* name, char* const argv[], char* const envv[])
+{
+	register const char*	path = name;
+	char			buffer[PATH_MAX];
+
+	if (*path != '/' && !(path = pathpath(name, NULL, PATH_REGULAR|PATH_EXECUTE, buffer, sizeof(buffer))))
+		path = name;
+	execve(path, argv, envv);
+	if (errno == ENOEXEC)
+	{
+		register char**	newargv;
+		register char**	ov;
+		register char**	nv;
+
+		for (ov = (char**)argv; *ov++;);
+		if (newargv = newof(0, char*, ov + 1 - (char**)argv, 0))
+		{
+			nv = newargv;
+			*nv++ = "sh";
+			*nv++ = (char*)path;
+			ov = (char**)argv;
+			while (*nv++ = *++ov);
+			path = pathshell();
+			execve(path, newargv, envv);
+			free(newargv);
+		}
+		else
+			errno = ENOMEM;
+	}
+	return -1;
+}
+
+#endif