1*4887Schin /***********************************************************************
2*4887Schin *                                                                      *
3*4887Schin *               This software is part of the ast package               *
4*4887Schin *           Copyright (c) 1985-2007 AT&T Knowledge Ventures            *
5*4887Schin *                      and is licensed under the                       *
6*4887Schin *                  Common Public License, Version 1.0                  *
7*4887Schin *                      by AT&T Knowledge Ventures                      *
8*4887Schin *                                                                      *
9*4887Schin *                A copy of the License is available at                 *
10*4887Schin *            http://www.opensource.org/licenses/cpl1.0.txt             *
11*4887Schin *         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
12*4887Schin *                                                                      *
13*4887Schin *              Information and Software Systems Research               *
14*4887Schin *                            AT&T Research                             *
15*4887Schin *                           Florham Park NJ                            *
16*4887Schin *                                                                      *
17*4887Schin *                 Glenn Fowler <gsf@research.att.com>                  *
18*4887Schin *                  David Korn <dgk@research.att.com>                   *
19*4887Schin *                   Phong Vo <kpv@research.att.com>                    *
20*4887Schin *                                                                      *
21*4887Schin ***********************************************************************/
22*4887Schin #pragma prototyped
23*4887Schin 
24*4887Schin #include <ast.h>
25*4887Schin 
26*4887Schin #if _lib_symlink
27*4887Schin 
28*4887Schin NoN(symlink)
29*4887Schin 
30*4887Schin #else
31*4887Schin 
32*4887Schin #include "fakelink.h"
33*4887Schin 
34*4887Schin #include <error.h>
35*4887Schin 
36*4887Schin #ifndef ENOSYS
37*4887Schin #define ENOSYS	EINVAL
38*4887Schin #endif
39*4887Schin 
40*4887Schin int
41*4887Schin symlink(const char* a, char* b)
42*4887Schin {
43*4887Schin 	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)))
44*4887Schin 	{
45*4887Schin 		int	n;
46*4887Schin 		int	fd;
47*4887Schin 
48*4887Schin 		if ((fd = open(b, O_CREAT|O_TRUNC|O_WRONLY, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)) < 0)
49*4887Schin 			return -1;
50*4887Schin 		n = strlen(a) + 1;
51*4887Schin 		n = (write(fd, FAKELINK_MAGIC, sizeof(FAKELINK_MAGIC)) != sizeof(FAKELINK_MAGIC) || write(fd, a, n) != n) ? -1 : 0;
52*4887Schin 		close(fd);
53*4887Schin 		return n;
54*4887Schin 	}
55*4887Schin 	errno = ENOSYS;
56*4887Schin 	return -1;
57*4887Schin }
58*4887Schin 
59*4887Schin #endif
60