tags:

views:

494

answers:

1
+1  Q: 

How to solve "msgget: No space left on device" error?

I am writing an IPC application using message queues. While using msgget() function to get Message Queue I am getting this error.

The requested operations does not require lot of space on the device and there should be space left as well.

Any ideas. Thank you in advance

+2  A: 

ENOSPC from msgget indicates that the system-wide maximum number of message queues has been reached.

You may be able to configure this limit - eg in Linux you can tweak /proc/sys/kernel/msgmni.

caf  2009-10-12 10:54:18
Any workaround if I do not have root access?
Alex Xander  2009-10-12 12:34:25
I do not believe so, it is an administratively set resource limit. `echo "Please increase number of message queues." | mail root@localhost` is probably the best you can do ;)
caf  2009-10-12 12:41:09
@Alex - if your machine is not configured to support message queues at all, or not enough message queues, someone has to reconfigure it. That person will need root privileges. If it isn't you, speak to the administrator. Or use something other than `msgget()`.
Jonathan Leffler  2009-10-12 14:51:12
thanks all! I got root access and edited /proc/sys/kernel/msgmni.
Alex Xander  2009-10-12 20:15:34
Be aware that changes to sysctls made through `/proc/` don't survive reboots - to make it permanent add a line to `/etc/sysctl.conf` like `kernel.msgmni = 2000`
caf  2009-10-12 21:26:30

related questions

any good tool for makefile generation?
How do you pass a function as a parameter in C?
Where should a veteran C programmer start in order to master Java ?
Any good book on best practice and guidelines in developing a SDK in C?
How do you determine the size of a file in C?
Decoding printf statements in C (Printf Primer)
Shift operator in C
How to avoid redefining VERSION, PACKAGE, etc.
Alpha blending sprites in Nintendo DS Homebrew
When should I use type abstraction in embedded systems
How to implement continuations?
What are the barriers to understanding pointers and what can be done to overcome them?
Anyone have experience creating a shared library in MATLAB?
String.indexOf function in C
Passing multidimensional arrays as function arguments in C
C/C++ library for reading MIDI signals from a USB MIDI device
Choosing a static code analysis tool
How do you printf an unsigned long long int?
Good STL-like library for C.
Rockbox audio format
Why am I getting a malloc: double free error with realloc()?
Should I learn C?
GTK implementation of MessageBox
Is gettimeofday() guaranteed to be of microsecond resolution?
How to use the C socket API in C++ on z/OS