netbsd man page for utrace

UTRACE(2)						      BSD System Calls Manual							 UTRACE(2)

NAME
     utrace -- insert user record in ktrace log

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <sys/types.h>
     #include <sys/param.h>
     #include <sys/time.h>
     #include <sys/uio.h>
     #include <sys/ktrace.h>

     int
     utrace(const char *label, void *addr, size_t len);

DESCRIPTION
     Adds a record to the process trace with information supplied by user.  The record is identified by label and contains len bytes from memory
     pointed to by addr.  This call only has an effect if the calling process is being traced.

RETURN VALUES
     Upon successful completion, a value of 0 is returned.  Otherwise, a value of -1 is returned and errno is set to indicate the error.

ERRORS
     [ENOSYS]		Currently running kernel was compiled without ktrace(2) support (option KTRACE).

     [EINVAL]		Specified data length len was bigger than KTR_USER_MAXLEN.

SEE ALSO
     kdump(1), ktrace(1), ktruss(1), fktrace(2), ktrace(2), options(4)

HISTORY
     The utrace() system call first appeared in FreeBSD 2.2.  It was added to NetBSD in NetBSD 1.6.  The label argument is a NetBSD extension.

BSD
								 December 28, 2000							       BSD