syscall(1) plan9 man page | unix.com

SYSCALL(1)						      General Commands Manual							SYSCALL(1)

NAME
       syscall	- test a system call

SYNOPSIS
       syscall [ -o ] entry [ arg ...  ]

DESCRIPTION
       Syscall	invokes  the  system call entry with the given arguments.  It prints the return value and the error string, if there was an error.
       An argument is either an integer constant as in C (its value is passed), a string (its address is passed), or the literal buf (a pointer to
       a  1  Kbyte buffer is passed).  If -o is given, the contents of the 1 Kbyte buffer are printed as a zero-terminated string after the system
       call is done.

EXAMPLES
       Write a string to standard output

	      syscall write 1 hello 5

       Print the name of the file connected to standard input

	      syscall -o fstat 0 buf

SOURCE
       /sys/src/cmd/syscall

SEE ALSO
       Section 2 of this manual.

DIAGNOSTICS
       If entry is not a system call name, the exit status is If the system call succeeds, the exit status is null; otherwise the exit	status	is
       the string that errstr(2) returns.

																	SYSCALL(1)