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/*
// PLP - An implementation of the PSION link protocol
//
//
// The code in this file was written by Rudolf Koenig
// (rfkoenig@immd4.informatik.uni-erlangen.de). (from his p3nfs code)
// The Copyright remains his
//
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// e-mail philip.proudman@btinternet.com
*/
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h> /* for usleep() */
#include <string.h> /* for bzero() */
#include <termios.h>
#if defined(linux) || defined(_IBMR2) || defined(__NetBSD__)
#include <sys/ioctl.h> /* for ioctl() */
#endif
#include <sys/errno.h>
#ifdef sun
#include <sys/ttold.h> /* sun has TIOCEXCL there */
#endif
#if defined (__SVR4)
#include <stdlib.h>
#endif
#ifndef hpux
#define mflag int
#else /* hpux */
#include <sys/termiox.h>
#include <sys/modem.h>
#endif
/*
#if !defined(CRTSCTS) && defined(_IBMR2)
#define CRTSCTS 0x80000000
#endif
*/
#ifdef __sgi
#define CRTSCTS CNEW_RTSCTS
#endif
#ifndef O_NOCTTY
#define O_NOCTTY 0
#endif
int
init_serial(const char *dev, int speed, int debug)
{
int fd, baud, clocal;
int uid, euid;
struct termios ti;
#ifdef hpux
struct termiox tx;
#endif
static struct baud {
int speed, baud;
} btable[] = {
{ 9600, B9600 },
#ifdef B19200
{ 19200, B19200 },
#else
#ifdef EXTA
{ 19200, EXTA },
#endif
#endif
#ifdef B38400
{ 38400, B38400 },
#else
#ifdef EXTB
{ 38400, EXTB },
#endif
#endif
#ifdef B57600
{ 57600, B57600 },
#endif
#ifdef B115200
{ 115200, B115200 },
#endif
{ 4800, B4800 },
{ 2400, B2400 },
{ 1200, B1200 },
{ 300, B300 },
{ 75, B75 },
{ 50, B50 },
{ 0, 0 }
}, *bptr;
if (speed) {
for (bptr = btable; bptr->speed; bptr++)
if (bptr->speed == speed)
break;
if (!bptr->baud) {
fprintf(stderr, "Cannot match selected speed %d\n", speed);
exit(1);
}
baud = bptr->baud;
} else
baud = 0;
if (debug)
printf("using %s...\n", dev);
euid = geteuid();
uid = getuid();
#ifdef hpux
#define seteuid(a) setresuid(-1, a, -1)
#endif
clocal = CLOCAL;
if (seteuid(uid)) {
perror("seteuid");
exit(1);
}
if ((fd = open(dev, O_RDWR | O_NDELAY | O_NOCTTY, 0)) < 0) {
perror(dev);
exit(1);
}
if (seteuid(euid)) {
perror("seteuid back");
exit(1);
}
if (debug)
printf("open done\n");
#ifdef TIOCEXCL
ioctl(fd, TIOCEXCL, (char *) 0); /* additional open() calls shall fail */
#else
fprintf(stderr, "WARNING: opened %s non-exclusive!\n", dev);
#endif
memset(&ti, 0, sizeof(struct termios));
#if defined(hpux) || defined(_IBMR2)
ti.c_cflag = CS8 | HUPCL | clocal | CREAD;
#endif
#if defined(sun) || defined(linux) || defined(__sgi) || defined(__NetBSD__)
ti.c_cflag = CS8 | HUPCL | clocal | CRTSCTS | CREAD;
ti.c_iflag = IGNBRK | IGNPAR;
ti.c_cc[VMIN] = 1;
ti.c_cc[VTIME] = 0;
#endif
cfsetispeed(&ti, baud);
cfsetospeed(&ti, baud);
if (tcsetattr(fd, TCSADRAIN, &ti) < 0)
perror("tcsetattr TCSADRAIN");
#ifdef hpux
bzero(&tx, sizeof(struct termiox));
tx.x_hflag = RTSXOFF | CTSXON;
if (ioctl(fd, TCSETXW, &tx) < 0)
perror("TCSETXW");
#endif
#if defined(_IBMR2)
ioctl(fd, TXDELCD, "dtr");
ioctl(fd, TXDELCD, "xon");
ioctl(fd, TXADDCD, "rts"); /* That's how AIX does CRTSCTS */
#endif
return fd;
}
void
ser_exit(int fd)
{
struct termios ti;
if (ioctl(fd, TCGETS, (caddr_t) & ti) < 0)
perror("TCGETSW");
ti.c_cflag &= ~CRTSCTS;
if (tcsetattr(fd, TCSANOW, &ti) < 0)
perror("TCSETSW");
(void) close(fd);
}
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