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communication adapted for unix socket

more_to_read
lapupe 2016-10-27 16:25:33 +02:00
parent 8de367100b
commit 6b9e5ab270
2 changed files with 132 additions and 108 deletions
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225
lib/communication.c
View File

@ -2,72 +2,67 @@
#include <stdio.h>
#include <time.h>
#include <errno.h>
#include <sys/socket.h>
int file_write (const char *path, const char *buf, size_t msize)
int file_write (const int fd, const char *buf, const int msize)
{
if (buf == NULL) {
fprintf (stderr, "file_write: buf == NULL\n");
return -1;
}
// if (buf == NULL) {
// fprintf (stderr, "file_write: buf == NULL\n");
// return -1;
// }
// TODO debug
// printf("file_write: path to open %s\n", path);
int fd = open (path, O_WRONLY);
if (fd <= 0) {
printf("file_write: fd < 0\n");
perror ("file_write");
return ER_FILE_OPEN;
}
// int fd = open (path, O_WRONLY);
// if (fd <= 0) {
// printf("file_write: fd < 0\n");
// perror ("file_write");
// return ER_FILE_OPEN;
// }
int ret = 0;
int ret2 = 0;
//printf ("%ld bytes to write\n", msize);
ret = write (fd, buf, msize);
ret = send (fd, buf, msize, 0);
if (ret <= 0) {
fprintf (stderr, "err: written %s\n", path);
}
ret2 = close (fd);
if (ret2 < 0) {
fprintf (stderr, "err: close [err: %d] %s\n", ret2, path);
perror ("closing");
fprintf (stderr, "err: written %d\n", fd);
}
return ret;
}
int file_read (const char *path, char **buf, size_t *msize)
int file_read (const int fd, char **buf)
{
if (buf == NULL) {
fprintf (stderr, "file_read: buf == NULL\n");
return -1;
}
// if (buf == NULL) {
// fprintf (stderr, "file_read: buf == NULL\n");
// return -1;
// }
int fd = open (path, O_RDONLY);
if (fd <= 0) {
return ER_FILE_OPEN;
}
// int fd = open (path, O_RDONLY);
// if (fd <= 0) {
// return ER_FILE_OPEN;
// }
// TODO debug
// printf("file_read: opened file %s\n", path);
if (*buf == NULL) {
*buf = malloc (BUFSIZ);
memset (*buf, 0, BUFSIZ);
}
// if (*buf == NULL) {
// fprintf(stderr, "file_read : *buf == NULL\n", );
// }
int ret = 0;
int ret2 = 0;
ret = read (fd, *buf, BUFSIZ);
ret = recv (fd, *buf, BUFSIZ, 0);
if (ret < 0) {
fprintf (stderr, "err: read %s\n", path);
}
else {
*msize = ret;
fprintf (stderr, "err: read %d\n", fd);
}
ret2 = close (fd);
if (ret2 < 0) {
fprintf (stderr, "err: close [err: %d] %s\n", ret2, path);
return ret;
}
int close_socket(int fd) {
int ret;
ret = close (fd);
if (ret < 0) {
fprintf (stderr, "err: close [err: %d] %d\n", ret, fd);
perror ("closing");
}
@ -152,26 +147,19 @@ int srv_close (struct service *srv)
return 0;
}
int srv_get_new_process (const struct service *srv, struct process *p)
int srv_get_new_process (const char *buf, struct process *p)
{
if (srv->spath == NULL) {
return -1;
}
char *buf = NULL;
size_t msize = 0;
/*char *buf = malloc(BUFSIZ);
memset(buf, 0, BUFSIZ);
int ret = 0;
while (ret == 0) {
ret = file_read (srv->spath, &buf, &msize);
if (ret < 0) {
fprintf (stderr, "err: listening on %s\n", srv->spath);
exit (1);
}
}
ret = file_read (fd, &buf);
if (ret < 0) {
fprintf (stderr, "err: listening on %d\n", fd);
exit (1);
} else if (ret == 0) {
perror("get new process");
}*/
char *token = NULL, *saveptr = NULL;
char *str = NULL;
@ -197,21 +185,21 @@ int srv_get_new_process (const struct service *srv, struct process *p)
}
}
if (buf != NULL)
free (buf);
//if (buf != NULL)
// free (buf);
srv_process_gen (p, pid, index, version);
return 0;
}
int srv_read (struct process *p, char ** buf, size_t * msize)
int srv_read (struct process *p, char ** buf)
{
return file_read (p->path_out, buf, msize);
return file_read (p->proc_fd, buf);
}
int srv_write (struct process *p, char * buf, size_t msize)
{
return file_write (p->path_in, buf, msize);
return file_write (p->proc_fd, buf, msize);
}
// APPLICATION
@ -223,7 +211,7 @@ int app_srv_connection (struct service *srv, const char *connectionstr, size_t m
return -1;
}
return file_write (srv->spath, connectionstr, msize);
return file_write (srv->server_fd, connectionstr, msize);
}
int app_create (struct process *p, pid_t pid, int index, int version)
@ -237,37 +225,66 @@ int app_create (struct process *p, pid_t pid, int index, int version)
// creates the pipes
int ret;
if ((ret = mkfifo (p->path_in, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)))
{
switch (errno) {
case EACCES :
printf ("file %s : EACCES\n", p->path_in);
return 1;
case EEXIST :
printf ("file %s : EEXIST\n", p->path_in);
break;
case ENAMETOOLONG :
printf ("file %s : ENAMETOOLONG\n", p->path_in);
return 2;
case ENOENT :
printf ("file %s : ENOENT\n", p->path_in);
return 3;
case ENOSPC :
printf ("file %s : ENOSPC\n", p->path_in);
return 4;
case ENOTDIR :
printf ("file %s : ENOTDIR\n", p->path_in);
return 5;
case EROFS :
printf ("file %s : EROFS\n", p->path_in);
return 6;
default :
printf ("err file %s unknown\n", p->path_in);
return 7;
}
}
// if ((ret = mkfifo (p->path_in, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)))
// {
// switch (errno) {
// case EACCES :
// printf ("file %s : EACCES\n", p->path_in);
// return 1;
// case EEXIST :
// printf ("file %s : EEXIST\n", p->path_in);
// break;
// case ENAMETOOLONG :
// printf ("file %s : ENAMETOOLONG\n", p->path_in);
// return 2;
// case ENOENT :
// printf ("file %s : ENOENT\n", p->path_in);
// return 3;
// case ENOSPC :
// printf ("file %s : ENOSPC\n", p->path_in);
// return 4;
// case ENOTDIR :
// printf ("file %s : ENOTDIR\n", p->path_in);
// return 5;
// case EROFS :
// printf ("file %s : EROFS\n", p->path_in);
// return 6;
// default :
// printf ("err file %s unknown\n", p->path_in);
// return 7;
// }
// }
if ((ret = mkfifo (p->path_out, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH))) {
// if ((ret = mkfifo (p->path_out, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH))) {
// switch (errno) {
// case EACCES :
// printf ("file %s : EACCES\n", p->path_out);
// return 1;
// case EEXIST :
// printf ("file %s : EEXIST\n", p->path_out);
// break;
// case ENAMETOOLONG :
// printf ("file %s : ENAMETOOLONG\n", p->path_out);
// return 2;
// case ENOENT :
// printf ("file %s : ENOENT\n", p->path_out);
// return 3;
// case ENOSPC :
// printf ("file %s : ENOSPC\n", p->path_out);
// return 4;
// case ENOTDIR :
// printf ("file %s : ENOTDIR\n", p->path_out);
// return 5;
// case EROFS :
// printf ("file %s : EROFS\n", p->path_out);
// return 6;
// default :
// printf ("err file %s unknown\n", p->path_out);
// return 7;
// }
// }
if ((ret = mkfifo (p->path_proc, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH))) {
switch (errno) {
case EACCES :
printf ("file %s : EACCES\n", p->path_out);
@ -301,23 +318,27 @@ int app_create (struct process *p, pid_t pid, int index, int version)
int app_destroy (struct process *p)
{
if (unlink (p->path_in)) {
return 1;
}
// if (unlink (p->path_in)) {
// return 1;
// }
if (unlink (p->path_out)) {
// if (unlink (p->path_out)) {
// return 1;
// }
if (unlink (p->path_proc)) {
return 1;
}
return 0;
}
int app_read (struct process *p, char ** buf, size_t * msize)
int app_read (struct process *p, char ** buf)
{
return file_read (p->path_in, buf, msize);
return file_read (p->proc_fd, buf);
}
int app_write (struct process *p, char * buf, size_t msize)
{
return file_write (p->path_out, buf, msize);
return file_write (p->proc_fd, buf, msize);
}

15
lib/communication.h
View File

@ -30,7 +30,7 @@ struct service {
unsigned int version;
unsigned int index;
char spath[PATH_MAX];
FILE *spipe;
int server_fd;
};
int srv_init (int argc, char **argv, char **env
@ -38,7 +38,7 @@ int srv_init (int argc, char **argv, char **env
, int (*cb)(int argc, char **argv, char **env
, struct service *srv, const char *sname));
int srv_get_new_process (const struct service *srv, struct process *proc);
int srv_get_new_process (const char *buf, struct process *proc);
/*
* returns
@ -50,7 +50,7 @@ int srv_get_new_process (const struct service *srv, struct process *proc);
int srv_create (struct service *srv);
int srv_close (struct service *srv);
int srv_read (struct process *, char ** buf, size_t *);
int srv_read (struct process *, char ** buf);
int srv_write (struct process *, char * buf, size_t);
// APPLICATION
@ -61,12 +61,15 @@ int app_srv_connection (struct service *, const char *, size_t);
int app_create (struct process *, pid_t pid, int index, int version);
int app_destroy (struct process *);
int app_read (struct process *, char ** buf, size_t *);
int app_read (struct process *, char ** buf);
int app_write (struct process *, char * buf, size_t);
// wrappers
int file_read (const char *path, char **buf, size_t *msize);
int file_write (const char *path, const char *buf, size_t msize);
int file_read (int fd, char **buf);
int file_write (int fd, const char *buf, const int m_size);
//close socket
int close_socket(int fd);
//open, close, read, write