|SYSCALL(2)||System Calls Manual||SYSCALL(2)|
— indirect system call
Standard C Library (libc, -lc)
function 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
form should be used when one or more of the arguments is a 64-bit argument
to ensure that argument alignment is correct. This system call is useful for
testing new system calls that do not have entries in the C library.
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.
syscall() function appeared in
There is no way to simulate system calls that have multiple return values such as pipe(2).
|June 16, 1993||Debian|