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gohigh
343
study/linux-travel/MINIX-1.5/1.5/Source/commands/zmodem/rbsb.c
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343
study/linux-travel/MINIX-1.5/1.5/Source/commands/zmodem/rbsb.c
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/*
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*
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* Rev 05-05-1988
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* This file contains Unix specific code for setting terminal modes,
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* very little is specific to ZMODEM or YMODEM per se (that code is in
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* sz.c and rz.c). The CRC-16 routines used by XMODEM, YMODEM, and ZMODEM
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* are also in this file, a fast table driven macro version
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*
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* V7/BSD HACKERS: SEE NOTES UNDER mode(2) !!!
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*
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* This file is #included so the main file can set parameters such as HOWMANY.
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* See the main files (rz.c/sz.c) for compile instructions.
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*/
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#ifdef V7
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sgtty.h>
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#define OS "V7/BSD"
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#ifdef LLITOUT
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long Locmode; /* Saved "local mode" for 4.x BSD "new driver" */
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long Locbit = LLITOUT; /* Bit SUPPOSED to disable output translations */
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#include <strings.h>
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#endif
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#endif
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#ifndef OS
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#ifndef USG
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#define USG
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#endif
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#endif
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#ifdef USG
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <termio.h>
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#include <sys/ioctl.h>
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#define OS "SYS III/V"
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#define MODE2OK
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#include <string.h>
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#endif
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#if HOWMANY > 255
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Howmany must be 255 or less
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#endif
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/*
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* return 1 iff stdout and stderr are different devices
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* indicating this program operating with a modem on a
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* different line
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*/
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int Fromcu; /* Were called from cu or yam */
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from_cu()
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{
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struct stat a, b;
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fstat(1, &a); fstat(2, &b);
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Fromcu = a.st_rdev != b.st_rdev;
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return;
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}
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cucheck()
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{
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if (Fromcu)
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fprintf(stderr,"Please read the manual page BUGS chapter!\r\n");
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}
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struct {
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unsigned baudr;
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int speedcode;
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} speeds[] = {
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110, B110,
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300, B300,
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#ifdef B600
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600, B600,
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#endif
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1200, B1200,
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2400, B2400,
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4800, B4800,
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9600, B9600,
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#ifdef EXTA
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19200, EXTA,
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38400, EXTB,
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#endif
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0,
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};
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int Twostop; /* Use two stop bits */
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#ifndef READCHECK
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#ifdef FIONREAD
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#define READCHECK
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/*
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* Return non 0 iff something to read from io descriptor f
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*/
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rdchk(f)
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{
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static long lf;
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ioctl(f, FIONREAD, &lf);
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return ((int) lf);
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}
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#endif
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#ifdef SV
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#define READCHECK
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#include <fcntl.h>
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char checked = '\0' ;
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/*
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* Nonblocking I/O is a bit different in System V, Release 2
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*/
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rdchk(f)
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{
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int lf, savestat;
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savestat = fcntl(f, F_GETFL) ;
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fcntl(f, F_SETFL, savestat | O_NDELAY) ;
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lf = read(f, &checked, 1) ;
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fcntl(f, F_SETFL, savestat) ;
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return(lf) ;
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}
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#endif
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#endif
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static unsigned
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getspeed(code)
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{
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register n;
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for (n=0; speeds[n].baudr; ++n)
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if (speeds[n].speedcode == code)
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return speeds[n].baudr;
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return 38400; /* Assume fifo if ioctl failed */
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}
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#ifdef ICANON
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struct termio oldtty, tty;
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#else
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struct sgttyb oldtty, tty;
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struct tchars oldtch, tch;
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#endif
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int iofd = 0; /* File descriptor for ioctls & reads */
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/*
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* mode(n)
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* 3: save old tty stat, set raw mode with flow control
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* 2: set XON/XOFF for sb/sz with ZMODEM or YMODEM-g
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* 1: save old tty stat, set raw mode
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* 0: restore original tty mode
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*/
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mode(n)
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{
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static did0 = FALSE;
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vfile("mode:%d", n);
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switch(n) {
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#ifdef USG
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case 2: /* Un-raw mode used by sz, sb when -g detected */
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if(!did0)
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(void) ioctl(iofd, TCGETA, &oldtty);
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tty = oldtty;
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tty.c_iflag = BRKINT|IXON;
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tty.c_oflag = 0; /* Transparent output */
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tty.c_cflag &= ~PARENB; /* Disable parity */
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tty.c_cflag |= CS8; /* Set character size = 8 */
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if (Twostop)
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tty.c_cflag |= CSTOPB; /* Set two stop bits */
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#ifdef READCHECK
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tty.c_lflag = Zmodem ? 0 : ISIG;
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tty.c_cc[VINTR] = Zmodem ? -1:030; /* Interrupt char */
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#else
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tty.c_lflag = ISIG;
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tty.c_cc[VINTR] = Zmodem ? 03:030; /* Interrupt char */
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#endif
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tty.c_cc[VQUIT] = -1; /* Quit char */
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#ifdef NFGVMIN
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tty.c_cc[VMIN] = 1;
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#else
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tty.c_cc[VMIN] = 3; /* This many chars satisfies reads */
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#endif
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tty.c_cc[VTIME] = 1; /* or in this many tenths of seconds */
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(void) ioctl(iofd, TCSETAW, &tty);
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did0 = TRUE;
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return OK;
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case 1:
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case 3:
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if(!did0)
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(void) ioctl(iofd, TCGETA, &oldtty);
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tty = oldtty;
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tty.c_iflag = n==3 ? (IGNBRK|IXOFF) : IGNBRK;
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/* No echo, crlf mapping, INTR, QUIT, delays, no erase/kill */
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tty.c_lflag &= ~(ECHO | ICANON | ISIG);
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tty.c_oflag = 0; /* Transparent output */
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tty.c_cflag &= ~PARENB; /* Same baud rate, disable parity */
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tty.c_cflag |= CS8; /* Set character size = 8 */
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if (Twostop)
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tty.c_cflag |= CSTOPB; /* Set two stop bits */
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#ifdef NFGVMIN
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tty.c_cc[VMIN] = 1; /* This many chars satisfies reads */
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#else
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tty.c_cc[VMIN] = HOWMANY; /* This many chars satisfies reads */
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#endif
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tty.c_cc[VTIME] = 1; /* or in this many tenths of seconds */
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(void) ioctl(iofd, TCSETAW, &tty);
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did0 = TRUE;
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Baudrate = getspeed(tty.c_cflag & CBAUD);
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return OK;
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#endif
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#ifdef V7
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/*
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* NOTE: this should transmit all 8 bits and at the same time
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* respond to XOFF/XON flow control. If no FIONREAD or other
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* READCHECK alternative, also must respond to INTRRUPT char
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* This doesn't work with V7. It should work with LLITOUT,
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* but LLITOUT was broken on the machine I tried it on.
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*/
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case 2: /* Un-raw mode used by sz, sb when -g detected */
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if(!did0) {
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#ifdef TIOCEXCL
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ioctl(iofd, TIOCEXCL, 0);
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#endif
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ioctl(iofd, TIOCGETP, &oldtty);
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ioctl(iofd, TIOCGETC, (struct sgttyb *) &oldtch);
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#ifdef LLITOUT
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ioctl(iofd, TIOCLGET, &Locmode);
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#endif
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}
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tty = oldtty;
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tch = oldtch;
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#ifdef READCHECK
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tch.t_intrc = Zmodem ? -1:030; /* Interrupt char */
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#else
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tch.t_intrc = Zmodem ? 03:030; /* Interrupt char */
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#endif
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#ifdef ODDP
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tty.sg_flags |= ODDP;
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#endif
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#ifdef EVENP
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tty.sg_flags |= EVENP;
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#endif
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#ifdef CBREAK
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tty.sg_flags |= CBREAK;
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#endif
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#ifdef ALLDELAY
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tty.sg_flags &= ~ALLDELAY;
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#endif
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#ifdef CRMOD
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tty.sg_flags &= ~CRMOD;
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#endif
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#ifdef ECHO
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tty.sg_flags &= ~ECHO;
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#endif
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#ifdef LCASE
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tty.sg_flags &= ~LCASE;
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#endif
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ioctl(iofd, TIOCSETP, &tty);
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ioctl(iofd, TIOCSETC, (struct sgttyb *) &tch);
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#ifdef LLITOUT
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ioctl(iofd, TIOCLBIS, &Locbit);
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#endif
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bibi(99); /* un-raw doesn't work w/o lit out */
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did0 = TRUE;
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return OK;
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case 1:
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case 3:
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if(!did0) {
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#ifdef TIOCEXCL
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ioctl(iofd, TIOCEXCL, 0);
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#endif
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ioctl(iofd, TIOCGETP, &oldtty);
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ioctl(iofd, TIOCGETC, (struct sgttyb *) &oldtch);
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#ifdef LLITOUT
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ioctl(iofd, TIOCLGET, &Locmode);
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#endif
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}
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tty = oldtty;
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tty.sg_flags |= RAW;
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tty.sg_flags &= ~ECHO;
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ioctl(iofd, TIOCSETP, &tty);
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did0 = TRUE;
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Baudrate = getspeed(tty.sg_ospeed);
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return OK;
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#endif
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case 0:
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if(!did0)
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return ERROR;
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#ifdef USG
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(void) ioctl(iofd, TCSBRK, 1); /* Wait for output to drain */
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(void) ioctl(iofd, TCFLSH, 1); /* Flush input queue */
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(void) ioctl(iofd, TCSETAW, &oldtty); /* Restore modes */
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(void) ioctl(iofd, TCXONC,1); /* Restart output */
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#endif
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#ifdef V7
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ioctl(iofd, TIOCSETP, &oldtty);
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ioctl(iofd, TIOCSETC, (struct sgttyb *) &oldtch);
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#ifdef TIOCNXCL
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ioctl(iofd, TIOCNXCL, 0);
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#endif
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#ifdef LLITOUT
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ioctl(iofd, TIOCLSET, &Locmode);
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#endif
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#endif
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return OK;
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default:
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return ERROR;
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}
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}
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sendbrk()
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{
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#ifdef V7
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#ifdef TIOCSBRK
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#define CANBREAK
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sleep(1);
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ioctl(iofd, TIOCSBRK, 0);
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sleep(1);
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ioctl(iofd, TIOCCBRK, 0);
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#endif
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#endif
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#ifdef USG
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#define CANBREAK
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ioctl(iofd, TCSBRK, 0);
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#endif
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}
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/* End of rbsb.c */
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