syscall man page on NeXTSTEP

syscall man page on NeXTSTEP

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SYSCALL(2)							    SYSCALL(2)

NAME
       syscall - indirect system call

SYNOPSIS
       #include <syscall.h>

       syscall(number, arg, ...)

DESCRIPTION
       Syscall	performs the system call whose assembly language interface has
       the  specified  number,	register  arguments  r0	 and  r1  and  further
       arguments arg.  Symbolic constants for system calls can be found in the
       header file <syscall.h>.

       The r0 value of the system call is returned.

DIAGNOSTICS
       When the C-bit is  set,	syscall	 returns  -1  and  sets	 the  external
       variable errno (see intro(2)).

BUGS
       There  is no way to simulate system calls such as pipe(2), which return
       values in register r1.

4th Berkeley Distribution	April 16, 1986			    SYSCALL(2)

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