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syscall(2)


NAME

  syscall - 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 language
  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 documented
  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 variable
  errno.


SEE ALSO

  Functions:  errno(2), pipe(2)

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