https://www.emblogic.com/blog/01/project-3ipc-server-client-using-shared-memory-and-semaphores/ Embedded System and ARM Training Mon, 07 Oct 2013 04:00:03 +0000 hourly 1 http://wordpress.org/?v=3.9.1 https://www.emblogic.com/blog/01/project-3ipc-server-client-using-shared-memory-and-semaphores/#comment-3615 Thu, 31 Jan 2013 15:48:03 +0000 http://emblogic.org/blog/?p=5913#comment-3615 man execl says:
RETURN VALUE
The exec() functions only return if an error has have occurred. The
return value is -1, and errno is set to indicate the error.
So if an error has occurred which means that the child process in which you hav done execl has not been replaced by the new process then you can access the
retval of the execl function (For that it would be better to use perror(“”) rather than checkg the return value as perror will tell you why the error has come ). In case of no error then you will go into the new replaced process so accessing the return value has no significance.

]]> https://www.emblogic.com/blog/01/project-3ipc-server-client-using-shared-memory-and-semaphores/#comment-3599 Tue, 29 Jan 2013 12:20:20 +0000 http://emblogic.org/blog/?p=5913#comment-3599 how can we access or print return value of execl?

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