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tableau.c
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#ifndef LINT
static char sccs_tableauid[] = "@(#)tableau.c Version 1.1 Date 00/02/21 Hour 12:07:17";
#endif
/*---------------------------------------------------------------------------
pt_attiva.c: funzione per la gestione dell'interfacciamento
tra il S.I.A. e il sistema TV GuestLink
Parametri in input - tty, speed, parity, databit, stopbit
---------------------------------------------------------------------------*/
#include "dls_include.h"
#include "paytv.h"
#include <sys/wait.h>
#include <pwd.h>
pid_t dbpid;
unsigned int time_to_sleep=80;
int *sia_status;
int main(int argc, char *argv[])
{
int i,lun,dls_qr,dls_qw;
char pt_bcc(const char*);
char c;
char *scarto;
char pt_stringa[MAXSTRLEN];
struct passwd *dls_passwd;
struct dls_msg {
long mtype;
char mtext[MAXSTRLEN];
};
struct dls_msg dls_msgstruct;
if(argc < 6) {
fprintf(stderr,"Usage: %s tty, speed, parity, databit, stopbit\n",argv[0]);
exit(1);
}
if((dls_shmid = shmget((key_t)PT_SHM,sizeof(sia_status),IPC_EXCL | IPC_CREAT | 0666)) == ERROR) {
if(errno != EEXIST) {
perror("Cannot create Shared Memory ! reason");
exit(1);
}
else {
if((dls_shmid = shmget((key_t)PT_SHM,sizeof(sia_status),0666)) == ERROR) {
perror("Cannot get shared memory identifier reason");
exit(1);
}
}
}
if((shm_pointer = shmat(dls_shmid,(char *)0,0)) == (char *)ERROR) {
perror("Cannot attache shared memory segment to my process reason");
exit(1);
}
sia_status = (int *)shm_pointer;
*sia_status = FALSE;
/*
* Apro il device e ne setto le caratteristiche
*/
if(dls_opentty(argv) == ERROR)
exit(1);
dls_passwd = getpwnam("informix");
if(setgid(dls_passwd->pw_gid) == ERROR) {
perror("Can't set group id (informix) reason");
exit(1);
}
if(setuid(dls_passwd->pw_uid) == ERROR) {
perror("Can't set user id (informix) reason");
exit(1);
}
/*
* Creo semaforo e setto valido
*/
semshm = semget((key_t)PT_SEM,1,IPC_CREAT|0660);
if(semshm == ERROR) {
perror("Cannot create semaphore");
exit(1);
}
(void)semctl(semshm,0,SETVAL,1);
/*
* Creo coda di messaggi READ
*/
if((dls_qr = msgget((key_t)PT_MSGQR,IPC_CREAT | 0660)) == ERROR) {
perror("Can't create message queue ID (READ)");
exit(1);
}
/*
* Creo coda di messaggi WRITE
*/
if((dls_qw = msgget((key_t)PT_MSGQW,IPC_CREAT | 0660)) == ERROR) {
perror("Can't create message queue ID (WRITE)");
exit(1);
}
/*
* Forko e Leggo/Scrivo
*/
if((dbpid = fork()) == 0) {
/*
* Leggo il device e valorizzo la coda di messaggi
*/
i = 0;
while(read(dls_fdtty,&c,1) > 0) {
if(c == PT_ACK) {
pt_stringa[0] = c;
pt_stringa[1] = '\0';
dls_msgstruct.mtype = 1L;
(void)strcpy(dls_msgstruct.mtext,pt_stringa);
if(msgsnd(dls_qr,(void *)&dls_msgstruct,sizeof(pt_stringa),0) == ERROR) {
perror("Can't send message queue");
exit(1);
}
i = 0;
continue;
}
if(c == PT_ENQ) {
pt_stringa[0] = c;
pt_stringa[1] = '\0';
dls_msgstruct.mtype = 1L;
(void)strcpy(dls_msgstruct.mtext,pt_stringa);
if(msgsnd(dls_qr,(void *)&dls_msgstruct,sizeof(pt_stringa),0) == ERROR) {
perror("Can't send message queue");
exit(1);
}
i = 0;
continue;
}
if(c == PT_NCK) {
pt_stringa[0] = c;
pt_stringa[1] = '\0';
dls_msgstruct.mtype = 1L;
(void)strcpy(dls_msgstruct.mtext,pt_stringa);
if(msgsnd(dls_qr,(void *)&dls_msgstruct,sizeof(pt_stringa),0) == ERROR) {
perror("Can't send message queue");
exit(1);
}
i = 0;
continue;
}
if(c == PT_ETX) {
pt_stringa[i] = '\0';
scarto = (char *)malloc(sizeof(char));
read(dls_fdtty,scarto,1);
free(scarto);
dls_msgstruct.mtype = 1L;
(void)strcpy(dls_msgstruct.mtext,pt_stringa);
if(msgsnd(dls_qr,(void *)&dls_msgstruct,sizeof(pt_stringa),0) == ERROR) {
perror("Can't send message queue");
exit(1);
}
i = 0;
continue;
}
pt_stringa[i] = c;
i++;
}
}
else { /* Processo Padre */
while(TRUE) {
if(msgrcv(dls_qw,(void *)&dls_msgstruct,sizeof(pt_stringa),1L,0) == ERROR) { /* Errore fatale */
perror("Fatal error while receiving !");
exit(1);
}
lun = strlen(dls_msgstruct.mtext);
dls_msgstruct.mtext[lun] = pt_bcc(&dls_msgstruct.mtext[1]);
lun++;
dls_msgstruct.mtext[lun] = '\0';
if(write(dls_fdtty,dls_msgstruct.mtext,lun) == ERROR ) {
perror("Can't write to device");
exit(1);
}
}
}
}
int dls_opentty(char *argv[])
/*---------------------------------------------------------------------------
dls_opentty: funzione che apre e setta il device
---------------------------------------------------------------------------*/
{
char tmp[20];
struct termio dls_termio;
if((dls_device=(IOCONTROL *)malloc(sizeof(IOCONTROL)))==(IOCONTROL *)NULL) {
perror("Can't allocate memory");
return(ERROR);
}
strcpy(dls_device->dls_tty,argv[1]);
dls_device->dls_speed = atoi(argv[2]);
strcpy(dls_device->dls_parity,argv[3]);
dls_device->dls_bitdata = atoi(argv[4]);
dls_device->dls_bitstop = atoi(argv[5]);
(void)strcpy(tmp,(char *)dls_device->dls_tty);
/*
* Aggiungo suffisso "/dev/" se non presente nel parametro
*/
if((strstr((char *)dls_device->dls_tty,"/dev/")) == (char *)NULL)
(void)sprintf((char *)dls_device->dls_tty,"/dev/%s",tmp);
/*
* Apertura porta per lettura sospensiva
*/
if((dls_fdtty = open((char *)dls_device->dls_tty,O_RDWR)) == ERROR) {
perror("Can't open device");
return(ERROR);
}
/*
* Apertura porta OK !
* Configuro il device con i parametri ricevuti (velocita', parita', ecc..)
*/
if ( ioctl(dls_fdtty,TCGETA,&dls_copia) == ERROR ) {
perror("Can't get terminal characteristics");
return(ERROR);
}
memcpy((void *)&dls_termio,(void *)&dls_copia,sizeof(struct termio));
dls_termio.c_cflag &= ~CBAUD;
dls_termio.c_cflag &= ~CSIZE;
dls_termio.c_iflag &= ~IXANY;
dls_termio.c_iflag &= ~IXOFF;
dls_termio.c_iflag &= ~IXON;
dls_termio.c_iflag |= IXON | IXOFF;
switch(dls_device->dls_speed) {
case 50:
dls_termio.c_cflag |= B50;
break;
case 75:
dls_termio.c_cflag |= B75;
break;
case 110:
dls_termio.c_cflag |= B110;
break;
case 134:
dls_termio.c_cflag |= B134;
break;
case 150:
dls_termio.c_cflag |= B150;
break;
case 200:
dls_termio.c_cflag |= B200;
break;
case 300:
dls_termio.c_cflag |= B300;
break;
case 600:
dls_termio.c_cflag |= B600;
break;
case 1200:
dls_termio.c_cflag |= B1200;
break;
case 2400:
dls_termio.c_cflag |= B2400;
break;
case 4800:
dls_termio.c_cflag |= B4800;
break;
case 9600:
dls_termio.c_cflag |= B9600;
break;
case 19200:
dls_termio.c_cflag |= B19200;
break;
default:
fprintf(stderr,"Invalid speed -> %d\n",dls_device->dls_speed);
return(ERROR);
break;
}
/*
* Set parita'
*/
switch(dls_device->dls_parity[0]) {
case 'E':
dls_termio.c_cflag &= ~PARODD;
dls_termio.c_cflag |= PARENB;
break;
case 'N':
dls_termio.c_cflag &= ~PARENB;
dls_termio.c_cflag &= ~PARODD;
break;
case 'O':
dls_termio.c_cflag |= PARENB;
dls_termio.c_cflag |= PARODD;
break;
default:
fprintf(stderr,"Invalid parity -> %s\n",dls_device->dls_parity);
return(ERROR);
break;
}
/*
* Set bit di data
*/
switch(dls_device->dls_bitdata) {
case 7:
dls_termio.c_cflag |= CS7;
break;
case 8:
dls_termio.c_cflag |= CS8;
break;
default:
fprintf(stderr,"Invalid bit data -> %d\n",dls_device->dls_bitdata);
return(ERROR);
break;
}
/*
* Set bit di stop
*/
switch(dls_device->dls_bitstop) {
case 1:
dls_termio.c_cflag &= ~CSTOPB;
break;
case 2:
dls_termio.c_cflag |= CSTOPB;
break;
default:
fprintf(stderr,"Invalid bit stop -> %d\n",dls_device->dls_bitstop);
return(ERROR);
break;
}
dls_termio.c_lflag &= ~ECHO;
dls_termio.c_lflag &= ~ICANON;
dls_termio.c_cc[VTIME] = 0;
dls_termio.c_cc[VMIN] = 1;
if ( ioctl(dls_fdtty,TCSETA,&dls_termio) == ERROR ) {
perror("Can't set terminal characteristics");
return(ERROR);
}
return(0);
}
char pt_bcc(const char *t)
/*------------------------------------------------------------------------------
pt_bcc - Calcola il codice di controllo di una stringa generica
null-terminata per NOKIA GuestLink
------------------------------------------------------------------------------*/
{
register char bcc;
bcc = 0;
while (*t) { bcc = bcc ^ *t++; }
return(bcc);
}