04-23-2019
You have to use an IPC (interprocess communication) mechanism, some listed here:
1. use a file
2. use pipes
3. use shared memory
4. semaphores / mutexes
tldp.org link for IPC
6 Linux Interprocess Communications Documentation
Unless you are using shared memory, there is normally no direct access to memory-only objects by the parent into a child process memory. Debuggers may use kernel mode memory access to get around this restriction -- a security issue otherwise.
Last edited by jim mcnamara; 04-23-2019 at 12:39 PM..
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IPC(2) Linux Programmer's Manual IPC(2)
NAME
ipc - System V IPC system calls
SYNOPSIS
int ipc(unsigned int call, int first, int second, int third, void *ptr, long fifth);
DESCRIPTION
ipc() is a common kernel entry point for the System V IPC calls for messages, semaphores, and shared memory. call determines which IPC
function to invoke; the other arguments are passed through to the appropriate call.
User programs should call the appropriate functions by their usual names. Only standard library implementors and kernel hackers need to
know about ipc().
CONFORMING TO
ipc() is Linux specific, and should not be used in programs intended to be portable.
SEE ALSO
msgctl(2), msgget(2), msgrcv(2), msgsnd(2), semctl(2), semget(2), semop(2), shmat(2), shmctl(2), shmdt(2), shmget(2)
Linux 1.2.4 1995-04-15 IPC(2)