89 lines
2.3 KiB
C
89 lines
2.3 KiB
C
#include "../lib/communication.h"
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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 char *spath)
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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 = service_get_new_process (&proc, spath);
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if (ret == -1) {
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fprintf (stderr, "Error service_get_new_process\n");
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exit (1);
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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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// printf ("before print\n");
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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[BUFSIZ];
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bzero(buf, BUFSIZ);
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// printf ("before read\n");
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if ((ret = service_read (&proc, &buf, &msize))) {
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fprintf(stdout, "error service_read %d\n", ret);
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exit (1);
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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 = service_write (&proc, &buf, msize))) {
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fprintf(stdout, "error service_write %d\n", ret);
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exit (1);
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}
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// printf ("after proc write\n");
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printf ("\033[32mStill \033[31m%d\033[32m 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[])
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{
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// gets the service path, such as /tmp/<service>
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char spath[PATH_MAX];
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service_path (spath, "pingpong");
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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 = service_create (spath))) {
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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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// the service will loop until the end of time, a specific message, a signal
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main_loop (spath);
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// the application will shut down, and remove the service named pipe
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if ((ret = service_close (spath))) {
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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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