NAME
utrace —
insert user record in ktrace
log
SYNOPSIS
#include
<sys/types.h>
#include <sys/param.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 the 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, the value 0 is returned; otherwise the value -1 is returned and the global variable errno is set to indicate the error.
ERRORS
- [
ENOSYS] - The currently running kernel was compiled without ktrace(2) support (option KTRACE).
- [
ENAMETOOLONG] - The length of the label string was longer than
KTR_USER_MAXIDLEN-1. - [
EINVAL] - The specified data length len was bigger than
KTR_USER_MAXLEN.
SEE ALSO
HISTORY
The utrace() system call first appeared in
FreeBSD 2.2. It was added to
OpenBSD in OpenBSD 5.4. The
label argument is an extension.