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write_state.c
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write_state.c
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// Evan Smedley 101148695
// Trong Nguyen 100848232
#include <stdio.h>
#include <stdbool.h>
#include <sys/msg.h>
#include <unistd.h>
#include <assert.h>
#include "message_queue.h"
#include "structs.h"
#define STATE_FILE "system_state.txt"
int main() {
// Get access to state message queue
int state_msgqid = msgq_create((key_t) 8888);
// Erase previous state information in STATE_FILE
FILE *f1 = fopen(STATE_FILE, "w");
assert(f1 != NULL);
fprintf(f1, "write_state -> Online\n");
fclose(f1);
// Create send buffer
state_msg_t buffer;
// Wait for message queue message to write state message
while(true) {
msgq_receive(state_msgqid, (void *)&buffer, sizeof(buffer.message), 1);
FILE *f1 = fopen(STATE_FILE, "a");
assert(f1 != NULL);
fprintf(f1, "\n%s\n", buffer.message);
fclose(f1);
}
}