93 lines
2.4 KiB
C
93 lines
2.4 KiB
C
#include "../lib/communication.h"
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#define PONGD_SERVICE_NAME "pongd"
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/*
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* main loop
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*
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* opens the application pipes,
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* reads then writes the same message,
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* then closes the pipes
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*/
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void main_loop (const struct service *srv)
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{
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int ret;
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struct process proc;
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int cnt = 10;
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while (cnt--) {
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// -1 : error, 0 = no new process, 1 = new process
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ret = srv_get_new_process (srv, &proc);
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//printf("ret = %d\n", ret);
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if (ret == -1) {
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fprintf (stderr, "MAIN_LOOP: error service_get_new_process\n");
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continue;
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} else if (ret == 0) { // that should not happen
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continue;
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}
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srv_process_print (&proc);
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//printf ("after print\n");
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// about the message
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size_t msize = BUFSIZ;
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char *buf = NULL;
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// printf ("before read\n");
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if ((ret = srv_read (&proc, &buf, &msize)) == -1) {
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fprintf(stdout, "MAIN_LOOP: error service_read %d\n", ret);
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continue;
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}
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// printf ("after read\n");
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printf ("read, size %ld : %s\n", msize, buf);
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// printf ("before proc write\n");
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if ((ret = srv_write (&proc, buf, msize)) == -1) {
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fprintf(stdout, "MAIN_LOOP: error service_write %d\n", ret);
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continue;
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}
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// printf ("after proc write\n");
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printf ("%d applications to serve\n",cnt);
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}
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}
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/*
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* service ping-pong
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*
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* 1. creates the named pipe /tmp/<service>, then listens
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* 2. opens the named pipes in & out
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* 3. talks with the (test) program
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* 4. closes the test program named pipes
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* 5. removes the named pipe /tmp/<service>
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*/
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int main(int argc, char * argv[], char **env)
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{
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struct service srv;
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srv_init (argc, argv, env, &srv, PONGD_SERVICE_NAME, NULL);
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printf ("Listening on %s.\n", srv.spath);
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// creates the service named pipe, that listens to client applications
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int ret;
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if ((ret = srv_create (&srv))) {
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fprintf(stdout, "error service_create %d\n", ret);
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exit (1);
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}
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printf("MAIN: server created\n" );
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// the service will loop until the end of time, a specific message, a signal
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main_loop (&srv);
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// the application will shut down, and remove the service named pipe
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if ((ret = srv_close (&srv))) {
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fprintf(stdout, "error service_close %d\n", ret);
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exit (1);
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}
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return EXIT_SUCCESS;
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}
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