diff options
Diffstat (limited to 'usr/src/lib/libast/common/comp/dup2.c')
| -rw-r--r-- | usr/src/lib/libast/common/comp/dup2.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/usr/src/lib/libast/common/comp/dup2.c b/usr/src/lib/libast/common/comp/dup2.c new file mode 100644 index 0000000000..220bb2f72d --- /dev/null +++ b/usr/src/lib/libast/common/comp/dup2.c @@ -0,0 +1,46 @@ +/*********************************************************************** +* * +* This software is part of the ast package * +* Copyright (c) 1985-2007 AT&T Knowledge Ventures * +* and is licensed under the * +* Common Public License, Version 1.0 * +* by AT&T Knowledge Ventures * +* * +* A copy of the License is available at * +* http://www.opensource.org/licenses/cpl1.0.txt * +* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * +* * +* 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_dup2 + +NoN(dup2) + +#else + +#include <error.h> + +int +dup2(int d1, int d2) +{ + int save_errno; + + if (d1 == d2) return(d1); + save_errno = errno; + close(d2); + errno = save_errno; + return(fcntl(d1, F_DUPFD, d2)); +} + +#endif |