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author | mux <mux@FreeBSD.org> | 2002-04-17 13:06:36 +0000 |
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committer | mux <mux@FreeBSD.org> | 2002-04-17 13:06:36 +0000 |
commit | a207e41bef089b8849a230f44088a562d0b5d19f (patch) | |
tree | cb447f9f2a04a764ece9fcefc6fa6b52d19870b8 /include/kenv.h | |
parent | c79270302c4767b589a4fe70da3ba9866936358f (diff) | |
download | FreeBSD-src-a207e41bef089b8849a230f44088a562d0b5d19f.zip FreeBSD-src-a207e41bef089b8849a230f44088a562d0b5d19f.tar.gz |
Rework the kernel environment subsystem. We now convert the static
environment needed at boot time to a dynamic subsystem when VM is
up. The dynamic kernel environment is protected by an sx lock.
This adds some new functions to manipulate the kernel environment :
freeenv(), setenv(), unsetenv() and testenv(). freeenv() has to be
called after every getenv() when you have finished using the string.
testenv() only tests if an environment variable is present, and
doesn't require a freeenv() call. setenv() and unsetenv() are self
explanatory.
The kenv(2) syscall exports these new functionalities to userland,
mainly for kenv(1).
Reviewed by: peter
Diffstat (limited to 'include/kenv.h')
-rw-r--r-- | include/kenv.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/include/kenv.h b/include/kenv.h new file mode 100644 index 0000000..87f36f3 --- /dev/null +++ b/include/kenv.h @@ -0,0 +1,39 @@ +/*- + * Copyright (c) 2002 Maxime Henrion <mux@FreeBSD.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _KENV_H_ +#define _KENV_H_ + +#include <sys/cdefs.h> +#include <sys/kenv.h> + +__BEGIN_DECLS +int kenv(int, char *, char *, int); +__END_DECLS + +#endif /* !_KENV_H_ */ |