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Full Discussion: msgget message queue always get permission denied
Top Forums Programming msgget message queue always get permission denied Post 302553381 by Corona688 on Wednesday 7th of September 2011 11:36:15 AM
Old 09-07-2011
You need to start checking return values. You may not have been noticing that your second program wasn't even opening the queue at all...

The sender program should open it with O_RDWR as well.

You don't need to use the torturous individual flags for permissions when you create the queue. Just ... | 0666 suffices.

---------- Post updated at 09:36 AM ---------- Previous update was at 09:26 AM ----------

Once it's opened, you get 'invalid argument' when sending, because:

Code:
// from man page
           struct msgbuf {
               long mtype;       /* message type, must be > 0 */
               char mtext[1];    /* message data */
           };

Last edited by Corona688; 09-07-2011 at 12:42 PM..
 

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LEARN ABOUT DEBIAN

set_color

set_color(1)							       fish							      set_color(1)

NAME

       set_color - set_color - set the terminal color

set_color - set the terminal color
   Synopsis
       set_color [-v --version] [-h --help] [-b --background COLOR] [COLOR]

   Description
       Change the foreground and/or background color of the terminal. COLOR is one of black, red, green, brown, yellow, blue, magenta, purple,
       cyan, white and normal.

       o -b, --background Set the background color

       o -c, --print-colors Prints a list of all valid color names

       o -h, --help Display help message and exit

       o -o, --bold Set bold or extra bright mode

       o -u, --underline Set underlined mode

       o -v, --version Display version and exit

       Calling set_color normal will set the terminal color to whatever is the default color of the terminal.

       Some terminals use the --bold escape sequence to switch to a brighter color set. On such terminals, set_color white will result in a grey
       font color, while set_color --bold white will result in a white font color.

       Not all terminal emulators support all these features. This is not a bug in set_color but a missing feature in the terminal emulator.

       set_color uses the terminfo database to look up how to change terminal colors on whatever terminal is in use. Some systems have old and
       incomplete terminfo databases, and may lack color information for terminals that support it. Download and install the latest version of
       ncurses and recompile fish against it in order to fix this issue.

Version 1.23.1							  Sun Jan 8 2012						      set_color(1)
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