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author | Igor Pashev <pashev.igor@gmail.com> | 2012-06-24 22:28:35 +0000 |
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committer | Igor Pashev <pashev.igor@gmail.com> | 2012-06-24 22:28:35 +0000 |
commit | 3950ffe2a485479f6561c27364d3d7df5a21d124 (patch) | |
tree | 468c6e14449d1b1e279222ec32f676b0311917d2 /src/lib/libast/comp/symlink.c | |
download | ksh-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.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/src/lib/libast/comp/symlink.c b/src/lib/libast/comp/symlink.c new file mode 100644 index 0000000..b0a5787 --- /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 |