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plein de programmes débiles, qui marchent un peu mieux

more_to_read
Philippe PITTOLI 2016-05-27 17:00:02 +02:00
parent e2142f0c72
commit ea885106e1
5 changed files with 234 additions and 36 deletions
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183
lib/communication.c
View File

@ -30,7 +30,32 @@ int service_create (const char *fifopath)
{
int ret;
if ((ret = mkfifo (fifopath, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH))) {
return 1;
switch (errno) {
case EACCES :
printf ("file %s : EACCES\n", fifopath);
return 1;
case EEXIST :
printf ("file %s : EEXIST\n", fifopath);
break;
case ENAMETOOLONG :
printf ("file %s : ENAMETOOLONG\n", fifopath);
return 2;
case ENOENT :
printf ("file %s : ENOENT\n", fifopath);
return 3;
case ENOSPC :
printf ("file %s : ENOSPC\n", fifopath);
return 4;
case ENOTDIR :
printf ("file %s : ENOTDIR\n", fifopath);
return 5;
case EROFS :
printf ("file %s : EROFS\n", fifopath);
return 6;
default :
printf ("err file %s unknown\n", fifopath);
return 7;
}
}
return 0;
@ -45,14 +70,14 @@ int service_close (const char *fifopath)
return 0;
}
// TODO only works for a single process
// FIXME only works for a single process
void service_get_new_processes (struct process **proc, int *nproc, int sfifo)
{
char buf[BUFSIZ];
bzero (buf, BUFSIZ);
read (sfifo, buf, BUFSIZ);
proc = malloc(sizeof(struct process*) * 1); // FIXME
//proc[0] = malloc(sizeof(struct process*) * 1); // FIXME
proc[0] = malloc(sizeof(struct process) * 1); // FIXME
// unsigned long long int val = strtoul(s, NULL, 10);
@ -66,10 +91,18 @@ void service_get_new_processes (struct process **proc, int *nproc, int sfifo)
if (token == NULL)
break;
printf ("token : %s\n", token);
// do something
if (i == 1) {
// FIXME
proc[0]->pid = strtoul(token, NULL, 10);
int index = strchr (token, '-') - token;
char * buf_pid = strndup (token, index);
proc[0]->pid = strtoul(buf_pid, NULL, 10);
proc[0]->index = strtoul(token + index +1, NULL, 10);
printf ("buf_pid : %s\n", buf_pid);
printf ("pid : %d\n", proc[0]->pid);
printf ("index : %d\n", proc[0]->index);
}
else if (i == 2) {
// FIXME
@ -77,6 +110,8 @@ void service_get_new_processes (struct process **proc, int *nproc, int sfifo)
}
}
*nproc = 1;
}
void struct_process_free (struct process * p)
@ -100,6 +135,10 @@ void gen_process_structure (struct process *p
}
void process_print (struct process *p) {
printf ("process %d : index %d\n", p->pid, p->index);
}
int process_create (struct process *p, int index)
{
pid_t pid = getpid();
@ -109,12 +148,63 @@ int process_create (struct process *p, int index)
// creates the pipes
int ret;
if ((ret = mkfifo (fifopathin, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH))) {
return 1;
if ((ret = mkfifo (fifopathin, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)))
{
switch (errno) {
case EACCES :
printf ("file %s : EACCES\n", fifopathin);
return 1;
case EEXIST :
printf ("file %s : EEXIST\n", fifopathin);
break;
case ENAMETOOLONG :
printf ("file %s : ENAMETOOLONG\n", fifopathin);
return 2;
case ENOENT :
printf ("file %s : ENOENT\n", fifopathin);
return 3;
case ENOSPC :
printf ("file %s : ENOSPC\n", fifopathin);
return 4;
case ENOTDIR :
printf ("file %s : ENOTDIR\n", fifopathin);
return 5;
case EROFS :
printf ("file %s : EROFS\n", fifopathin);
return 6;
default :
printf ("err file %s unknown\n", fifopathin);
return 7;
}
}
if ((ret = mkfifo (fifopathout, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH))) {
return 1;
switch (errno) {
case EACCES :
printf ("file %s : EACCES\n", fifopathout);
return 1;
case EEXIST :
printf ("file %s : EEXIST\n", fifopathout);
break;
case ENAMETOOLONG :
printf ("file %s : ENAMETOOLONG\n", fifopathout);
return 2;
case ENOENT :
printf ("file %s : ENOENT\n", fifopathout);
return 3;
case ENOSPC :
printf ("file %s : ENOSPC\n", fifopathout);
return 4;
case ENOTDIR :
printf ("file %s : ENOTDIR\n", fifopathout);
return 5;
case EROFS :
printf ("file %s : EROFS\n", fifopathout);
return 6;
default :
printf ("err file %s unknown\n", fifopathout);
return 7;
}
}
// then creates the structure
@ -140,6 +230,32 @@ int process_destroy (struct process *p)
return 0;
}
int process_open_in (struct process *proc)
{
char fifopathin[PATH_MAX];
char fifopathout[PATH_MAX];
process_paths (fifopathin, fifopathout, proc->pid, proc->index);
printf ("opening in %s\n", fifopathin);
proc->in = fopen (fifopathin, "rb");
printf ("opened\n");
return 0;
}
int process_open_out (struct process *proc)
{
char fifopathin[PATH_MAX];
char fifopathout[PATH_MAX];
process_paths (fifopathin, fifopathout, proc->pid, proc->index);
printf ("opening out %s\n", fifopathout);
proc->out = fopen (fifopathout, "wb");
printf ("opened\n");
return 0;
}
int process_open (struct process *proc)
{
@ -147,47 +263,74 @@ int process_open (struct process *proc)
char fifopathout[PATH_MAX];
process_paths (fifopathin, fifopathout, proc->pid, proc->index);
proc->in = open (fifopathin, S_IRUSR);
proc->out = open (fifopathout, S_IRUSR);
printf ("opening %s\n", fifopathin);
proc->in = fopen (fifopathin, "rb");
printf ("opening %s\n", fifopathout);
proc->out = fopen (fifopathout, "wb");
printf ("opened\n");
return 0;
}
int process_close (struct process *proc)
int process_close_in (struct process *proc)
{
printf ("closing in\n");
if (proc->in != 0) {
close (proc->in);
fclose (proc->in);
proc->in = 0;
}
return 0;
}
int process_close_out (struct process *proc)
{
printf ("closing out\n");
if (proc->out != 0) {
close (proc->out);
fclose (proc->out);
proc->out = 0;
}
return 0;
}
int process_read (struct process *proc, void * buf, size_t * msize)
{
if ((*msize = read (proc->in, buf, *msize)))
return *msize;
int ret;
if ((ret = process_open_in (proc))) {
fprintf(stdout, "error process_create %d\n", ret);
exit (1);
}
*msize = fread (buf, 1, *msize, proc->in); // FIXME check errors
if ((ret = process_close_in (proc))) {
fprintf(stdout, "error process_close_in %d\n", ret);
exit (1);
}
return 0;
}
int process_write (struct process *proc, void * buf, size_t msize)
{
if ((msize = write (proc->out, buf, msize)))
return msize;
int ret;
if ((ret = process_open_out (proc))) {
fprintf(stdout, "error process_create %d\n", ret);
exit (1);
}
fwrite (buf, 1, msize, proc->out); // FIXME check errors
if ((ret = process_close_out (proc))) {
fprintf(stdout, "error process_close_out %d\n", ret);
exit (1);
}
return 0;
}
int service_read (struct process *proc, void * buf, size_t * msize)
{
if ((*msize = read (proc->out, buf, *msize)))
if ((*msize = fread (buf, 1, *msize, proc->out)))
return *msize;
return 0;
@ -195,7 +338,7 @@ int service_read (struct process *proc, void * buf, size_t * msize)
int service_write (struct process *proc, void * buf, size_t msize)
{
if ((msize = write (proc->in, buf, msize)))
if ((msize = fwrite (buf, 1, msize, proc->in)))
return msize;
return 0;

5
lib/communication.h
View File

@ -11,6 +11,8 @@
#include <sys/stat.h> // mkfifo
#include <fcntl.h> // open
#include <errno.h> // error numbers
#define TMPDIR "/tmp/"
#define COMMUNICATION_VERSION 1
@ -22,7 +24,7 @@ struct process {
pid_t pid;
unsigned int version;
unsigned int index;
int in, out;
FILE *in, *out;
};
// TODO create the service process structure
@ -45,6 +47,7 @@ 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);
void process_print (struct process *);
int process_create (struct process *, int index); // called by the application
int process_destroy (struct process *); // called by the application

29
open-read-close-fifo.c Normal file
View File

@ -0,0 +1,29 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
int main(int argc, char * argv[])
{
char *fifopathin = "/tmp/123000-1-in";
size_t msize = 100;
char buf[BUFSIZ];
FILE *in = fopen (fifopathin, "rb");
printf ("opened\n");
if ((msize = fread (buf, msize, 1, in))) {
printf ("error read %ld\n", msize);
return EXIT_FAILURE;
}
printf ("%s\n", buf);
sleep (10);
printf ("read end\n");
fclose (in);
return EXIT_SUCCESS;
}

30
open-write-close-fifo.c Normal file
View File

@ -0,0 +1,30 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
int main(int argc, char * argv[])
{
char *fifopathin = "/tmp/123000-1-in";
size_t msize;
FILE *out = fopen (fifopathin, "wb");
printf ("opened\n");
char *buf = "coucou";
printf ("write %s\n", buf);
if ((msize = fread (buf, 6, 1, out))) {
printf ("error read %ld\n", msize);
return EXIT_FAILURE;
}
sleep (10);
printf ("write end\n");
fclose (out);
return EXIT_SUCCESS;
}

23
service-test.c
View File

@ -19,34 +19,27 @@ void main_loop (const char *spath)
do {
service_get_new_processes (&proc, &nproc, sfifo);
printf ("nb proc : %d\n", nproc);
// for each process : open, read, write, close
for (int i = 0 ; i < nproc ; i++) {
printf ("new connected process : %d, version %d, index %d\n"
, proc[i].pid, proc[i].version, proc[i].index);
if ((ret = process_open (&proc[i]))) {
fprintf(stdout, "error process_create %d\n", ret);
exit (1);
}
process_print (&proc[i]);
// about the message
size_t msize;
char *buf;
size_t msize = BUFSIZ;
char buf[BUFSIZ];
if ((ret = process_read (&proc[i], &buf, &msize))) {
fprintf(stdout, "error process_read %d\n", ret);
exit (1);
}
printf ("read, size %ld : %s\n", msize, buf);
if ((ret = process_write (&proc[i], &buf, msize))) {
fprintf(stdout, "error process_read %d\n", ret);
exit (1);
}
if ((ret = process_close (&proc[i]))) {
fprintf(stdout, "error process_destroy %d\n", ret);
exit (1);
}
}
service_free_processes (&proc, nproc);
@ -82,7 +75,7 @@ int main(int argc, char * argv[])
main_loop (spath);
// the application will shut down, and remove the service named pipe
if ((ret = service_close ("windows"))) {
if ((ret = service_close (spath))) {
fprintf(stdout, "error service_close %d\n", ret);
exit (1);
}