astribank_is_starting - Mark / check is a Xorcom Astribank (xpp) is
astribank_is_starting [-d] [-v] [-t timeout] <-a|-r|-w>
astribank_is_starting [-d] [-v]
astribank_is_starting is an internal tool used by various xpp scripts
to mark that there may be an Astribank device currently initializing,
and to check for that mark.
Technically the mark is a SysV semaphore.
Add. Set the mark. Should return 0 unless there’s an error.
Remove. Reset the mark. Should return 0 unless there’s an
Timeout. Set the timeout value for the -w option. Default is 60
Wait. Wait for mark to be reset. Should return 0 unless there’s
Without -a or -r: return 0 if the mark has been set, or a non-zero
Print debug information to stderr.
Displays usage message.
If set, the astribank should appear there with the ID 11211168
(0xAB11A0). Naturally the ID (or rather, the usage of a
semaphore in the first place) is an implementation detail that
astribank_is_starting is used to mark the fact that an Astribank may be
currently reenumerating (technically: distonnecting and connecting as a
new USB device) after loading the firmware. Thus the script that loads
the firmware (/usr/share/dahdi/xpp_fxloader) uses this utility to set
The mark is reset by /usr/share/dahdi/waitfor_xpds , which is typically
run by the DAHDI init script and waits for all Astribanks to finish
Q: Why do you use a semaphore?
A: because, unlike the filesystem, it is writable at any given time.
Option ordering matter. The -v and -d options should preceed the
actions (-a, -r and -w). The -ttimeout option should preceed the -w
This manual page was written by Tzafrir Cohen
<email@example.com> . Permission is granted to copy, distribute
and/or modify this document under the terms of the GNU General Public
License, Version 2 any later version published by the Free Software
On Debian systems, the complete text of the GNU General Public License
can be found in /usr/share/common-licenses/GPL.
16 August 2009