Matt Emson a écrit :
I have 2 FPC programs running on a Linux machine, is there an easy
way to exchange a few data between these programs (I do not want to
use disk operations). I was thinking of using environment variables,
but I cannot find a way to change environment variables from a
program.
MMap? Unix domain sockets? Or do these count as file operations?
pipes,
IPC SysV message queues or shared memory (depends on what portability
you need; needs libc linking).
Things are simpler if the processes that need to communicate descend
from a common ancestor which can setup the communication, allowing
unnamed pipes, or private IPC SysV resources.
Isn't there a GetEnv and SetEnv procedure/function somewhere in the
LINUX RTL? Libc or somewhere like that?
If you set an environment variable in a process, only the descendent
processes will inherit and see it, and only the value it has when the
fork occured, so that's usually not an option.
HTH,
M
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