Does anyone know how to set the variables with the ipcs command?
I need to set the following variables:
Shared memory segments
message queues
semaphore arrays
all of these (1 Reply)
I am using SUN 0S 5.7.
My application has a dozen programs running in this machine, each instance of a program having 2 POSIX message queues for itself. Totally around 90 POSIX message queues.
Another small application uses a SYSTEM V shared memory and a message queue.
We face a problem... (1 Reply)
Hi,
I would like to setup a FOR loop script to find out all the existing linux workstation in the network w/ ip address, hostname and linux version.
I created a basic FOR loop script:
for i in $(seq 1 254)
do
echo 10.72.169.$i >> result
ssh -o ConnectTimeout=3 root@10.72.169.$i... (14 Replies)
hi,
I need help with ipcs command on Solaris. What does it do and what are options b,m,o,q does. Here is the sample output of ipcs -oq and ipcs -bm
IPC status from <running system> as of Sun Sep 7 23:07:59 GMT 2008
T ID KEY MODE OWNER GROUP CBYTES QNUM... (4 Replies)
Hi, let say i have 2 log files(they are below) dhcp and radius. What i need is to put the information to a file just from good connections ( Auth: Login OK ) others just ignore. And the information should look like: time, login name, mac, ip, server. But the trouble is that from radius log i get... (10 Replies)
I need some help to write a C++ code that read and write the register of a sequencer. I have to make a code that relate the objects with the physical address but I am a bit confuse. Could someone suggest me how to proceed? in which parts do I split the code?
thanks (1 Reply)
I am trying to run myApplication which allocates Some amount of shared memory at startup.
It failed because not available shared memory are available.
But when i ran,
ipcs -m
it is displaying empty(i.e no shared memory allocated in system.)
Why "ipcs -m" is displaying empty ?
... (5 Replies)
The ipcs -q command output includes a MODE column which tells user if the process is waiting on read or write on the queue. I used this in scripts on many systems (Solaris, AIX, SCO)
a snippet from man
MODE (all)
The facility access modes and flags: The mode consists of
11... (2 Replies)
Discussion started by: migurus
2 Replies
LEARN ABOUT PHP
dba_open
DBA_OPEN(3) 1 DBA_OPEN(3)dba_open - Open databaseSYNOPSIS
resource dba_open (string $path, string $mode, [string $handler], [mixed $...])
DESCRIPTION dba_open(3) establishes a database instance for $path with $mode using $handler.
PARAMETERS
o $path
- Commonly a regular path in your filesystem.
o $mode
- It is r for read access, w for read/write access to an already existing database, c for read/write access and database creation
if it doesn't currently exist, and n for create, truncate and read/write access. The database is created in BTree mode, other
modes (like Hash or Queue) are not supported. Additionally you can set the database lock method with the next char. Use l to lock
the database with a .lck file or d to lock the databasefile itself. It is important that all of your applications do this consis-
tently. If you want to test the access and do not want to wait for the lock you can add t as third character. When you are abso-
lutely sure that you do not require database locking you can do so by using - instead of l or d. When none of d, l or - is used,
dba will lock on the database file as it would with d.
Note
There can only be one writer for one database file. When you use dba on a web server and more than one request requires
write operations they can only be done one after another. Also read during write is not allowed. The dba extension uses locks
to prevent this. See the following table:
DBA locking
+-------------+---------------+---+---+---+---+---+---+---+
|already open | | | | | | | | |
| | | | | | | | | |
| | $mode = "rl" | | | | | | | |
| | | | | | | | | |
| | $mode = "rlt" | | | | | | | |
| | | | | | | | | |
| | $mode = "wl" | | | | | | | |
| | | | | | | | | |
| | $mode = "wlt" | | | | | | | |
| | | | | | | | | |
| | $mode = "rd" | | | | | | | |
| | | | | | | | | |
| | $mode = "rdt" | | | | | | | |
| | | | | | | | | |
| | $mode = "wd" | | | | | | | |
| | | | | | | | | |
| | $mode = "wdt" | | | | | | | |
| | | | | | | | | |
+-------------+---------------+---+---+---+---+---+---+---+
| not open | | | | | | | | |
| | | | | | | | | |
| | ok | | | | | | | |
| | | | | | | | | |
| | ok | | | | | | | |
| | | | | | | | | |
| | ok | | | | | | | |
| | | | | | | | | |
| | ok | | | | | | | |
| | | | | | | | | |
| | ok | | | | | | | |
| | | | | | | | | |
| | ok | | | | | | | |
| | | | | | | | | |
| | ok | | | | | | | |
| | | | | | | | | |
| | ok | | | | | | | |
| | | | | | | | | |
|$mode = "rl" | | | | | | | | |
| | | | | | | | | |
| | ok | | | | | | | |
| | | | | | | | | |
| | ok | | | | | | | |
| | | | | | | | | |
| | wait | | | | | | | |
| | | | | | | | | |
| | false | | | | | | | |
| | | | | | | | | |
| | illegal | | | | | | | |
| | | | | | | | | |
| | illegal | | | | | | | |
| | | | | | | | | |
| | illegal | | | | | | | |
| | | | | | | | | |
| | illegal | | | | | | | |
| | | | | | | | | |
|$mode = "wl" | | | | | | | | |
| | | | | | | | | |
| | wait | | | | | | | |
| | | | | | | | | |
| | false | | | | | | | |
| | | | | | | | | |
| | wait | | | | | | | |
| | | | | | | | | |
| | false | | | | | | | |
| | | | | | | | | |
| | illegal | | | | | | | |
| | | | | | | | | |
| | illegal | | | | | | | |
| | | | | | | | | |
| | illegal | | | | | | | |
| | | | | | | | | |
| | illegal | | | | | | | |
| | | | | | | | | |
|$mode = "rd" | | | | | | | | |
| | | | | | | | | |
| | illegal | | | | | | | |
| | | | | | | | | |
| | illegal | | | | | | | |
| | | | | | | | | |
| | illegal | | | | | | | |
| | | | | | | | | |
| | illegal | | | | | | | |
| | | | | | | | | |
| | ok | | | | | | | |
| | | | | | | | | |
| | ok | | | | | | | |
| | | | | | | | | |
| | wait | | | | | | | |
| | | | | | | | | |
| | false | | | | | | | |
| | | | | | | | | |
|$mode = "wd" | | | | | | | | |
| | | | | | | | | |
| | illegal | | | | | | | |
| | | | | | | | | |
| | illegal | | | | | | | |
| | | | | | | | | |
| | illegal | | | | | | | |
| | | | | | | | | |
| | illegal | | | | | | | |
| | | | | | | | | |
| | wait | | | | | | | |
| | | | | | | | | |
| | false | | | | | | | |
| | | | | | | | | |
| | wait | | | | | | | |
| | | | | | | | | |
| | false | | | | | | | |
| | | | | | | | | |
+-------------+---------------+---+---+---+---+---+---+---+
ook: the second call will be successfull.
owait: the second call waits until dba_close(3) is called for the first.
ofalse: the second call returns false.
oillegal: you must not mix
"l" and "d" modifiers for $mode parameter.
o $handler
- The name of the handler which shall be used for accessing $path. It is passed all optional parameters given to dba_open(3) and
can act on behalf of them.
RETURN VALUES
Returns a positive handle on success or FALSE on failure.
CHANGELOG
+--------+---------------------------------------------------+
|Version | |
| | |
| | Description |
| | |
+--------+---------------------------------------------------+
| 4.3.0 | |
| | |
| | It's possible to open database files over net- |
| | work connection. However in cases a socket con- |
| | nection will be used (as with http or ftp) the |
| | connection will be locked instead of the resource |
| | itself. This is important to know since in such |
| | cases locking is simply ignored on the resource |
| | and other solutions have to be found. |
| | |
+--------+---------------------------------------------------+
SEE ALSO dba_popen(3), dba_close(3).
PHP Documentation Group DBA_OPEN(3)
05-09-2014
