1da2e3ebdSchin /***********************************************************************
2da2e3ebdSchin *                                                                      *
3da2e3ebdSchin *               This software is part of the ast package               *
4*b30d1939SAndy Fiddaman *          Copyright (c) 1985-2012 AT&T Intellectual Property          *
5da2e3ebdSchin *                      and is licensed under the                       *
6*b30d1939SAndy Fiddaman *                 Eclipse Public License, Version 1.0                  *
77c2fbfb3SApril Chin *                    by AT&T Intellectual Property                     *
8da2e3ebdSchin *                                                                      *
9da2e3ebdSchin *                A copy of the License is available at                 *
10*b30d1939SAndy Fiddaman *          http://www.eclipse.org/org/documents/epl-v10.html           *
11*b30d1939SAndy Fiddaman *         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
12da2e3ebdSchin *                                                                      *
13da2e3ebdSchin *              Information and Software Systems Research               *
14da2e3ebdSchin *                            AT&T Research                             *
15da2e3ebdSchin *                           Florham Park NJ                            *
16da2e3ebdSchin *                                                                      *
17da2e3ebdSchin *                 Glenn Fowler <gsf@research.att.com>                  *
18da2e3ebdSchin *                  David Korn <dgk@research.att.com>                   *
19da2e3ebdSchin *                   Phong Vo <kpv@research.att.com>                    *
20da2e3ebdSchin *                                                                      *
21da2e3ebdSchin ***********************************************************************/
22da2e3ebdSchin #pragma prototyped
23da2e3ebdSchin 
24da2e3ebdSchin #include <ast.h>
25da2e3ebdSchin 
26da2e3ebdSchin #if _lib_symlink
27da2e3ebdSchin 
28da2e3ebdSchin NoN(symlink)
29da2e3ebdSchin 
30da2e3ebdSchin #else
31da2e3ebdSchin 
32da2e3ebdSchin #include "fakelink.h"
33da2e3ebdSchin 
34da2e3ebdSchin #include <error.h>
35da2e3ebdSchin 
36da2e3ebdSchin #ifndef ENOSYS
37da2e3ebdSchin #define ENOSYS	EINVAL
38da2e3ebdSchin #endif
39da2e3ebdSchin 
40da2e3ebdSchin int
41da2e3ebdSchin symlink(const char* a, char* b)
42da2e3ebdSchin {
43da2e3ebdSchin 	if (*a == '/' && (*(a + 1) == 'd' || *(a + 1) == 'p' || *(a + 1) == 'n') && (!strncmp(a, "/dev/tcp/", 9) || !strncmp(a, "/dev/udp/", 9) || !strncmp(a, "/proc/", 6) || !strncmp(a, "/n/", 3)))
44da2e3ebdSchin 	{
45da2e3ebdSchin 		int	n;
46da2e3ebdSchin 		int	fd;
47da2e3ebdSchin 
48*b30d1939SAndy Fiddaman 		if ((fd = open(b, O_CREAT|O_TRUNC|O_WRONLY|O_cloexec, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)) < 0)
49da2e3ebdSchin 			return -1;
50da2e3ebdSchin 		n = strlen(a) + 1;
51da2e3ebdSchin 		n = (write(fd, FAKELINK_MAGIC, sizeof(FAKELINK_MAGIC)) != sizeof(FAKELINK_MAGIC) || write(fd, a, n) != n) ? -1 : 0;
52da2e3ebdSchin 		close(fd);
53da2e3ebdSchin 		return n;
54da2e3ebdSchin 	}
55da2e3ebdSchin 	errno = ENOSYS;
56da2e3ebdSchin 	return -1;
57da2e3ebdSchin }
58da2e3ebdSchin 
59da2e3ebdSchin #endif
60