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SYSCALL(2) BSD System Calls Manual SYSCALL(2)
syscall -- indirect system call
syscall(int number, ...);
Syscall() 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 <sys/syscall.h>.
The return value is 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
There is no way to simulate system calls that have multiple return values such as pipe(2).
The syscall() function call appeared in 4.0BSD.
4th Berkeley Distribution June 16, 1993 4th Berkeley Distribution
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