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libipc-old
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libipc-old/lib/communication.h

58 lines
1.4 KiB
C

#ifndef __COMMUNICATION_H__
#define __COMMUNICATION_H__
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h> // unlink
#include <sys/types.h> // mkfifo
#include <sys/stat.h> // mkfifo
#include <fcntl.h> // open
#define TMPDIR "/tmp/"
#define COMMUNICATION_VERSION 1
// TODO to check the right length for a path
#define PATH_MAX BUFSIZ
struct process {
pid_t pid;
unsigned int version;
unsigned int index;
int in, out;
};
// TODO create the service process structure
int service_path (char *buf, const char *sname);
void gen_process_structure (struct process *p
, pid_t pid, unsigned int index, unsigned int version);
/*
* returns
* 0 : ok
* 1 : no service name
* 2 : service name too long
* 3 : unable to create fifo
*/
int service_create (const char *sname);
int service_close (const char *sname);
void service_get_new_processes (struct process **, int *nproc, int sfifo);
void service_free_processes (struct process **, int nproc);
int process_create (struct process *, int index); // called by the application
int process_destroy (struct process *); // called by the application
int process_open (struct process *); // called by the service & application
int process_close (struct process *); // called by the service & application
int process_read (struct process *, void * buf, size_t *);
int process_write (struct process *, void * buf, size_t);
#endif