NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | NOTES | EXAMPLE | SEE ALSO | COLOPHON
SYSCALL(2) Linux Programmer's Manual SYSCALL(2)
syscall - indirect system call
#define _GNU_SOURCE /* or _BSD_SOURCE or _SVID_SOURCE */
#include <unistd.h>
#include <sys/syscall.h> /* For SYS_xxx definitions */
int syscall(int number, ...);
syscall() performs the system call whose assembly language interface has the
specified number with the specified arguments. Symbolic constants for system
calls can be found in the header file <sys/syscall.h>.
The return value is defined by the system call being invoked. In general, a 0
return value indicates success. A -1 return value indicates an error, and an
error code is stored in errno.
syscall() first appeared in 4BSD.
#define _GNU_SOURCE
#include <unistd.h>
#include <sys/syscall.h>
#include <sys/types.h>
int
main(int argc, char *argv[])
{
pid_t tid;
tid = syscall(SYS_gettid);
}
_syscall(2), intro(2), syscalls(2)
This page is part of release 3.08 of the Linux man-pages project. A
description of the project, and information about reporting bugs, can be found
at http://www.kernel.org/doc/man-pages/.
Linux 2007-07-26 SYSCALL(2)