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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 void *addr, size_t len);
DESCRIPTION
Adds a record to the process trace with information supplied by user.
The record 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
[EINVAL] Specified data length len was bigger than
KTR_USER_MAXLEN.
[ENOMEM] Insufficient memory to honor the request.
[ENOSYS] Currently running kernel was compiled without
ktrace(2) support (options KTRACE).
SEE ALSO
kdump(1), ktrace(1), ktrace(2)
HISTORY
The utrace() system call first appeared in FreeBSD 2.2.
FreeBSD 5.4 December 28, 2000 FreeBSD 5.4
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