To be honest, I did not look at errno after msgget() returned 0 (It was in the wee early hours and I had bigger fish..). I will try that and get back with the results. This will also tell me if the original key returns 0.
The interesting thing is we loaded a *way* earlier version of the code to test a completely different thing. I jut did a ipcs and got
where you can see msgqid == 0 and the system seems to be performing happily (at least this part of it). This would seem to enforce the observation / theory that once the msgqid becomes 0, it stays 0. No complaints from msgsnd() or msgrcv().
So - this may be a brainfart on my part. After all, I did have another bug throwing a SIGSEGV at the same time. And it was very late/early. If it is a brainfart, my apologies.
Again, this an unpatched Ubuntu 8
@achenlehas an interesting suggestion. I had not thought of setting errno to a value before making the call. The question then becomes: why not set it to (-1)? errno values are positive, at least on Linux. (I seem to remember them being negative numbers on BSD 4.1, but that was a *long* time ago...)
hi,all
i have in trouble about msgget.
i create a queue and the program like blow:
openMsg( pid_t key )
{
....
int msgid;
....
msgid=msgget(key,IPC_CREAT|IPC_EXCL|0666)
if( msgid<=0 ){
fprintf( stdout,"%s,%d",strerror(errno),errno );
return -1;
... (9 Replies)
I have a script that does a search and replace on a tree using find, xargs and sed that looks something like this.
find . -type f -print0 | xargs -0 sed -i 's/fromthis/tothis/g'
Now this works fine on new versions on Linux but I need to make the script work on an old RAQ550 that has an older... (3 Replies)
Hi,
I am having problem with msgget() function.
Here is the problem that I am having on Unix :
I have two processes sender and receiver. Sender generates queue (msgget()) with some key e.g. 938, for output.
Receiver reads from the same queue. i.e. receiver also tries to get queue... (2 Replies)
Hi,
I've some existing scripts wherein am using ftp + .netrc. I've defined my macros in .netrc file.
I want to switch to sftp now but it seems it doesn't support macros and .netrc and it gives "command invalid" error.
Is there any other alternative?
Note: I don't want help for... (1 Reply)
Hello,
I've setup a ubuntu 10.04 server running samba 3.4.7 as domain controler / file server at a customer site, that works great most of the time but I face a random problem. Of course I'm never on the site when the problem occurs, so I cannot investigate in real time.
What happens is that... (2 Replies)
I want to use msgget() to obtain a message queue between two processes, here is my code:
the first one create the mq, the second one open it and add a message to it. But when I execute the second one, I get permission denied. I've already desperately tried everything I can think of to solve this... (2 Replies)
Solaris 10 Sparc:
When you got a connection locking a tcp/port, and the status is CLOSE_WAIT (for ever :wall:), you just use the tcpdrop, to close the connection.
This is a OS bug. I wrote the bug id bellow:
BUG-ID
6468753 connections stuck in CLOSE_WAIT
The patch that's correct the bug:... (0 Replies)
Hello Folks,
Facing a problem starting Apache Services on AIX 7.1
This is the error i'm getting
/oraapp/prodora/iAS/Apache/Apache/bin/apachectl start: httpd started
Syntax error on line 17 of /oraapp/prodora/iAS/Apache/modplsql/cfg/plsql_pls.conf:
Cannot load... (0 Replies)