легкий telnet-подобный портовый зонд (lightweight telnet-like port probe)
Имя (Name)
telnet-probe - lightweight telnet-like port probe
Синопсис (Synopsis)
$PCP_BINADM_DIR/telnet-probe [-cv?] host port
Описание (Description)
telnet-probe allows the pmdashping(1) daemons to establish
connections to arbitrary local and remote service-providing
daemons so that response time and service availability
information can be obtained.
The required host and port number arguments have the same meaning
as their telnet(1) equivalents.
The -c option causes telnet-probe to perform a connect(2) only.
This skips the read(2) and write(2) exercise that would otherwise
be done after connecting (see below).
Once the telnet connection has been established, telnet-probe
reads from stdin until end-of-file, and writes all the input data
to the telnet connection. Next, telnet-probe will read from the
telnet connection until end-of-file, discarding whatever data it
receives. Then telnet-probe exits.
To operate successfully, the input passed via telnet-probe to the
remote service must be sufficient to cause the remote service to
close the connection when the last line of input has been
processed, e.g. ending with ``quit'' when probing SMTP on port
25.
By default telnet-probe will not produce any output, unless there
is an error in which case a diagnostic message can be displayed
(in verbose mode only) and the exit status will be non-zero
indicating a failure.
Параметры (Options)
The available command line options are:
-c Connect only, do not read or write.
-v Enable verbose mode.
-? Display usage message and exit.
Диагностика (Diagnostic)
If telnet-probe succeeds, then 0 will be returned. If the
attempt to establish a connection fails or is terminated, then a
non-zero exit status is returned.
Окружение PCP (PCP environment)
Environment variables with the prefix PCP_ are used to
parameterize the file and directory names used by PCP. On each
installation, the file /etc/pcp.conf contains the local values
for these variables. The $PCP_CONF variable may be used to
specify an alternative configuration file, as described in
pcp.conf(5).
Смотри также (See also)
PCPIntro(1), pmdashping(1), pmie(1), telnet(1), connect(2),
read(2) and write(2).
