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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/setpgid.c | |
download | ksh-upstream.tar.gz |
Imported Upstream version 93u+upstream
Diffstat (limited to 'src/lib/libast/comp/setpgid.c')
-rw-r--r-- | src/lib/libast/comp/setpgid.c | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/src/lib/libast/comp/setpgid.c b/src/lib/libast/comp/setpgid.c new file mode 100644 index 0000000..c966919 --- /dev/null +++ b/src/lib/libast/comp/setpgid.c @@ -0,0 +1,80 @@ +/*********************************************************************** +* * +* 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_setpgid + +NoN(setpgid) + +#else + +#include <error.h> + +#ifndef ENOSYS +#define ENOSYS EINVAL +#endif + +#if _lib_setpgrp2 +#define setpgrp setpgrp2 +#else +#if _lib_BSDsetpgrp +#define _lib_setpgrp2 1 +#define setpgrp BSDsetpgrp +#else +#if _lib_wait3 +#define _lib_setpgrp2 1 +#endif +#endif +#endif + +#if _lib_setpgrp2 +extern int setpgrp(int, int); +#else +extern int setpgrp(void); +#endif + +/* + * set process group id + */ + +int +setpgid(pid_t pid, pid_t pgid) +{ +#if _lib_setpgrp2 + return(setpgrp(pid, pgid)); +#else +#if _lib_setpgrp + int caller = getpid(); + + if ((pid == 0 || pid == caller) && (pgid == 0 || pgid == caller)) + return(setpgrp()); + errno = EINVAL; +#else + errno = ENOSYS; +#endif + return(-1); +#endif +} + +#endif |