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authorIgor Pashev <pashev.igor@gmail.com>2012-06-24 22:28:35 +0000
committerIgor Pashev <pashev.igor@gmail.com>2012-06-24 22:28:35 +0000
commit3950ffe2a485479f6561c27364d3d7df5a21d124 (patch)
tree468c6e14449d1b1e279222ec32f676b0311917d2 /src/lib/libast/comp/symlink.c
downloadksh-upstream.tar.gz
Imported Upstream version 93u+upstream
Diffstat (limited to 'src/lib/libast/comp/symlink.c')
-rw-r--r--src/lib/libast/comp/symlink.c59
1 files changed, 59 insertions, 0 deletions
diff --git a/src/lib/libast/comp/symlink.c b/src/lib/libast/comp/symlink.c
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--- /dev/null
+++ b/src/lib/libast/comp/symlink.c
@@ -0,0 +1,59 @@
+/***********************************************************************
+* *
+* 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.h>
+
+#if _lib_symlink
+
+NoN(symlink)
+
+#else
+
+#include "fakelink.h"
+
+#include <error.h>
+
+#ifndef ENOSYS
+#define ENOSYS EINVAL
+#endif
+
+int
+symlink(const char* a, char* b)
+{
+ 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)))
+ {
+ int n;
+ int fd;
+
+ if ((fd = open(b, O_CREAT|O_TRUNC|O_WRONLY, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)) < 0)
+ return -1;
+ n = strlen(a) + 1;
+ n = (write(fd, FAKELINK_MAGIC, sizeof(FAKELINK_MAGIC)) != sizeof(FAKELINK_MAGIC) || write(fd, a, n) != n) ? -1 : 0;
+ close(fd);
+ return n;
+ }
+ errno = ENOSYS;
+ return -1;
+}
+
+#endif