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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

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