NAMEtelnet-probe - lightweight telnet-like port probe
SYNOPSIS
$PCP_BINADM_DIR/telnet-probe [-v] host port
DESCRIPTIONtelnet-probe allows the pmdashping(1) and pmdaespping(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 -v option causes telnet-probe to be verbose while operating.
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.
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(4).
DIAGNOSTICS
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.
SEE ALSOPCPintro(1), pmdaespping(1), pmdashping(1), pmie(1) and telnet(1).
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