Re: mgetty и bforce

From

Ivan Shmakov (2:5002/75.3)

To

Zell

Date

2005-08-21T17:19:02Z

Area

RU.UNIX.FTN

From: Ivan Shmakov <Ivan.Shmakov@p3.f75.n5002.z2.fidonet.org>

>>>>> "Z" == Zell  <Zell@p777.f1532.n5030.z2.fidonet.org> writes:

 EI> снова. Нормально соединяется. wvdial дозванивается всегда
 EI> нормально. Если убрать mgetty со стрема, bforce звонит нормально.
 EI> Кто сталкивался с подобным. Чем лечить ?

 Z> нету разницы в описаных утройствах (в одном месте /dev/modem, в
 Z> другом /dev/ttyS0) ?

	BTW, куда лучше придерживаться рекоммендаций devices.txt из
	дистрибутива Linux при написании ПО, работающего с lock-файлами.

--cut: linux-2.4.31/Documentation/devices.txt--
	Serial ports

[...]

Arbitration of serial ports is provided by the use of lock files with
the names /var/lock/LCK..ttyX#.	 The contents of the lock file should
be the PID of the locking process as an ASCII number.

It is common practice to install links such as /dev/modem
which point to serial ports.  In order to ensure proper locking in the
presence of these links, it is recommended that software chase
symlinks and lock all possible names; additionally, it is recommended
that a lock file be installed with the corresponding alternate
device.	 In order to avoid deadlocks, it is recommended that the locks
are acquired in the following order, and released in the reverse:

	1. The symbolic link name, if any (/var/lock/LCK..modem)
	2. The "tty" name (/var/lock/LCK..ttyS2)
	3. The alternate device name (/var/lock/LCK..cua2)

In the case of nested symbolic links, the lock files should be
installed in the order the symlinks are resolved.
--cut: linux-2.4.31/Documentation/devices.txt--
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