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telnetd: add -w ("inetd wait") option. Can be configured off.

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gcc fils to fully optimize it out when it's off:

function                                             old     new   delta
telnetd_main                                        1527    1548     +21
packed_usage                                       26596   26587      -9

but nevertheless it's a useful (and so far single) example
how to write "inetd wait" tcp service.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2009-09-04 02:21:13 +02:00
parent cfc216345e
commit ed1667e8ee
3 changed files with 69 additions and 28 deletions
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20
include/usage.h
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@@ -1468,11 +1468,11 @@
"\n -m Get baud rate from modem's CONNECT status message" \
"\n -w Wait for a CR or LF before sending /etc/issue" \
"\n -n Do not prompt the user for a login name" \
"\n -f issue_file Display issue_file instead of /etc/issue" \
"\n -l login_app Invoke login_app instead of /bin/login" \
"\n -t timeout Terminate after timeout if no username is read" \
"\n -I initstring Init string to send before anything else" \
"\n -H login_host Log login_host into the utmp file as the hostname" \
"\n -f ISSUE_FILE Display ISSUE_FILE instead of /etc/issue" \
"\n -l LOGIN Invoke LOGIN instead of /bin/login" \
"\n -t SEC Terminate after SEC if no username is read" \
"\n -I INITSTR Send INITSTR before anything else" \
"\n -H HOST Log HOST into the utmp file as the hostname" \
#define grep_trivial_usage \
"[-HhrilLnqvso" \
@@ -4415,14 +4415,18 @@
IF_NOT_FEATURE_TELNETD_STANDALONE(" via inetd") "\n" \
"\nOptions:" \
"\n -l LOGIN Exec LOGIN on connect" \
"\n -f issue_file Display issue_file instead of /etc/issue" \
"\n -f ISSUE_FILE Display ISSUE_FILE instead of /etc/issue" \
"\n -K Close connection as soon as login exits" \
"\n (normally wait until all programs close slave pty)" \
IF_FEATURE_TELNETD_STANDALONE( \
"\n -p PORT Port to listen on" \
"\n -b ADDR Address to bind to" \
"\n -b ADDR[:PORT] Address to bind to" \
"\n -F Run in foreground" \
"\n -i Run as inetd subservice" \
"\n -i Run as inetd service" \
IF_FEATURE_TELNETD_INETD_WAIT( \
"\n -w SEC Run as inetd service in wait mode, linger time SEC" \
"\n -S Log to syslog (implied by -i or without -F and -w)" \
) \
)
/* "test --help" does not print help (POSIX compat), only "[ --help" does.