from small one page howto to huge articles all in one place
 

search text in:





Poll
Which filesystem do you use?






poll results

Last additions:
using iotop to find disk usage hogs

using iotop to find disk usage hogs

words:

887

views:

99415

userrating:

average rating: 1.7 (84 votes) (1=very good 6=terrible)


May 25th. 2007:
Words

486

Views

214557

why adblockers are bad


Workaround and fixes for the current Core Dump Handling vulnerability affected kernels

Workaround and fixes for the current Core Dump Handling vulnerability affected kernels

words:

161

views:

95592

userrating:

average rating: 1.3 (28 votes) (1=very good 6=terrible)


April, 26th. 2006:

Druckversion
You are here: manpages





seccomp_syscall_priority

Section: libseccomp Documentation (3)
Updated: 25 July 2012
Index Return to Main Contents
 

NAME

seccomp_syscall_priority - Prioritize syscalls in the seccomp filter  

SYNOPSIS

#include <seccomp.h>

typedef void * scmp_filter_ctx;

int SCMP_SYS(syscall_name);

int seccomp_syscall_priority(scmp_filter_ctx ctx,
                             int syscall, uint8_t priority);

Link with -lseccomp.
 

DESCRIPTION

The seccomp_syscall_priority() function provides a priority hint to the seccomp filter generator in libseccomp such that higher priority syscalls are placed earlier in the seccomp filter code so that they incur less overhead at the expense of lower priority syscalls. A syscall's priority can be set regardless of if any rules currently exist for that syscall; the library will remember the priority and it will be assigned to the syscall if and when a rule for that syscall is created. While it is possible to specify the syscall value directly using the standard __NR_syscall values, in order to ensure proper operation across multiple architectures it is highly recommended to use the SCMP_SYS() macro instead. See the EXAMPLES section below. The priority parameter takes an 8-bit value ranging from 0 - 255; a higher value represents a higher priority. The filter context ctx is the value returned by the call to seccomp_init().  

RETURN VALUE

The seccomp_syscall_priority() function returns zero on success, negative errno values on failure. The SCMP_SYS() macro returns a value suitable for use as the syscall value in seccomp_syscall_priority().  

EXAMPLES

#include <seccomp.h>

int main(int argc, char *argv[])
{
        int rc = -1;
        scmp_filter_ctx ctx;

        ctx = seccomp_init(SCMP_ACT_KILL);
        if (ctx == NULL)
                goto out;

        /* ... */

        rc = seccomp_syscall_priority(ctx, SCMP_SYS(read), 200);
        if (rc < 0)
                goto out;

        /* ... */

out:
        seccomp_release(ctx);
        return -rc;
}
 

NOTES

While the seccomp filter can be generated independent of the kernel, kernel support is required to load and enforce the seccomp filter generated by libseccomp. The libseccomp project site, with more information and the source code repository, can be found at http://libseccomp.sf.net. This library is currently under development, please report any bugs at the project site or directly to the author.  

AUTHOR

Paul Moore <paul@paul-moore.com>  

SEE ALSO

seccomp_rule_add(3), seccomp_rule_add_exact(3)


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
EXAMPLES
NOTES
AUTHOR
SEE ALSO


Please read "Why adblockers are bad".



Other free services
toURL.org
Shorten long
URLs to short
links like
http://tourl.org/2
tourl.org
.
Reverse DNS lookup
Find out which hostname(s)
resolve to a
given IP or other hostnames for the server
www.reversednslookup.org
rdf newsfeed | rss newsfeed | Atom newsfeed
- Powered by LeopardCMS - Running on Gentoo -
Copyright 2004-2017 Sascha Nitsch Unternehmensberatung UG(haftungsbeschränkt)
Valid XHTML1.1 : Valid CSS : buttonmaker
- Level Triple-A Conformance to Web Content Accessibility Guidelines 1.0 -
- Copyright and legal notices -
Time to create this page: 3.7 ms