RATRACE(1)RATRACE(1)
NAME
ratrace – trace process system calls
SYNOPSIS
ratrace
[
pid
] | [
-c command
]
DESCRIPTION
Ratrace
shows the system calls executed by a process,
either the one with
pid
or a fresh invocation of
command.
Trace output is determined by the kernel, not
ratrace.
Certain fixed rules apply.
The first four fields of the output are
pid, text name, system call name, and the PC of the user program.
Data is always printed as
pointer/\c
"string",
where the
string
is the first 32 bytes of the data, with
.
replacing non-printing ASCII characters
(printing characters are those between ASCII space (SP) and delete (DEL), exclusive).
Return values follow an
=,
and include the integer return value,
the
errstr
(with "" if there is no
errstr),
and
the start and stop times for the system call in nanoseconds.
The times are exclusive of the overhead for tracing.
FILES
/proc/pid/syscall
/proc/pid/ctl
SOURCE
/sys/src/cmd/ratrace.c
SEE ALSO
acid(1),
db(1),
proc(3)
BUGS
The printing of the data is too limited in length;
printing
.
instead of something more sensible is limiting.