Imported Upstream version 93u+upstream

1 files changed, 127 insertions, 0 deletions

diff --git a/src/lib/libast/path/pathpath.c b/src/lib/libast/path/pathpath.c
new file mode 100644
index 0000000..4c0831d
--- /dev/null
+++ b/src/lib/libast/path/pathpath.c
@@ -0,0 +1,127 @@
+/***********************************************************************
+*                                                                      *
+*               This software is part of the ast package               *
+*          Copyright (c) 1985-2012 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
+/*
+ * Glenn Fowler
+ * AT&T Research
+ *
+ * return full path to p with mode access using $PATH
+ * a!=0 enables related root search
+ * a!=0 && a!="" searches a dir first
+ * the related root must have a bin subdir
+ * p==0 sets the cached relative dir to a
+ * full path returned in path buffer
+ * if path==0 then the space is malloc'd
+ */
+
+#define _AST_API_H	1
+
+#include <ast.h>
+
+char*
+pathpath(char* path, const char* p, const char* a, int mode)
+{
+	return pathpath_20100601(p, a, mode, path, PATH_MAX);
+}
+
+#undef	_AST_API_H
+
+#include <ast_api.h>
+
+char*
+pathpath_20100601(const char* p, const char* a, int mode, register char* path, size_t size)
+{
+	register char*	s;
+	char*		x;
+	char		buf[PATH_MAX];
+
+	static char*	cmd;
+
+	if (!path)
+	{
+		path = buf;
+		if (!size || size > sizeof(buf))
+			size = sizeof(buf);
+	}
+	if (!p)
+	{
+		if (cmd)
+			free(cmd);
+		cmd = a ? strdup(a) : (char*)0;
+		return 0;
+	}
+	if (strlen(p) < size)
+	{
+		strcpy(path, p);
+		if (pathexists(path, mode))
+		{
+			if (*p != '/' && (mode & PATH_ABSOLUTE))
+			{
+				getcwd(buf, sizeof(buf));
+				s = buf + strlen(buf);
+				sfsprintf(s, sizeof(buf) - (s - buf), "/%s", p);
+				if (path != buf)
+					strcpy(path, buf);
+			}
+			return (path == buf) ? strdup(path) : path;
+		}
+	}
+	if (*p == '/')
+		a = 0;
+	else if (s = (char*)a)
+	{
+		x = s;
+		if (strchr(p, '/'))
+		{
+			a = p;
+			p = "..";
+		}
+		else
+			a = 0;
+		if ((!cmd || *cmd) && (strchr(s, '/') || (s = cmd)))
+		{
+			if (!cmd && *s == '/')
+				cmd = strdup(s);
+			if (strlen(s) < (sizeof(buf) - 6))
+			{
+				s = strcopy(path, s);
+				for (;;)
+				{
+					do if (s <= path) goto normal; while (*--s == '/');
+					do if (s <= path) goto normal; while (*--s != '/');
+					strcpy(s + 1, "bin");
+					if (pathexists(path, PATH_EXECUTE))
+					{
+						if (s = pathaccess(path, p, a, mode, path, size))
+							return path == buf ? strdup(s) : s;
+						goto normal;
+					}
+				}
+			normal: ;
+			}
+		}
+	}
+	x = !a && strchr(p, '/') ? "" : pathbin();
+	if (!(s = pathaccess(x, p, a, mode, path, size)) && !*x && (x = getenv("FPATH")))
+		s = pathaccess(x, p, a, mode, path, size);
+	return (s && path == buf) ? strdup(s) : s;
+}