osx man page for syscall

Query: syscall

OS: osx

Section: 2

Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar

SYSCALL(2)						      BSD System Calls Manual							SYSCALL(2)

NAME
syscall -- indirect system call
SYNOPSIS
#include <sys/syscall.h> #include <unistd.h> int syscall(int number, ...);
DESCRIPTION
Syscall() performs the system call whose assembly language interface has the specified number with the specified arguments. Symbolic con- stants for system calls can be found in the header file <sys/syscall.h>. This function is useful for testing new system calls that do not have entries in the C library.
RETURN VALUES
The return values are 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.
BUGS
There is no way to simulate system calls that have multiple return values such as pipe(2).
HISTORY
The syscall() function call appeared in 4.0BSD. 4th Berkeley Distribution June 23, 2008 4th Berkeley Distribution
Related Man Pages
syscall(2) - linux
syscall(2) - debian
__syscall(2) - netbsd
syscall(3ucb) - opensolaris
syscall(3ucb) - hpux
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