syscall.2

来自「<B>Digital的Unix操作系统VAX 4.2源码</B>」· 2 代码 · 共 29 行

.\" SCCSID: @(#)syscall.2	3.1	11/23/87
.TH syscall 2 RISC
.SH Name
syscall \- indirect system call
.SH Syntax
.BR "syscall(number, args, ...)" 
.SH Description
.NXR "syscall system call"
.NXR "system call" "performing indirect"
The
.PN syscall
system call
performs the system call whose assembly language
interface has the specified
.I number,
and further arguments
.IR args .
There may be no arguments.
.PP
The return value of the system call is returned.
.SH Diagnostics
If an error occurs,
.PN syscall
returns \-1 and sets the
external variable 
.I errno.
.SH See Also
errno(2)