syscall(2)syscall(2)NAMEsyscall - indirect system call
SYNOPSIS
#include <sys/syscall.h> #include <unistd.h>
syscall (number, arg, ...)
DESCRIPTION
The syscall system call performs the system call whose assembly lan‐
guage interface has the specified number, register arguments r0 and r1,
and further arguments arg.
The r0 value of the system call is returned.
NOTES
This interface is not recommended. An alternative interface is docu‐
mented in chown(2).
RESTRICTIONS
There is no way to simulate system calls such as pipe, which return
values in register r1.
DIAGNOSTICS
When the C-bit is set, syscall returns -1 and sets the external vari‐
able errno.
SEE ALSO
Functions: errno(2), pipe(2)syscall(2)