592 lines
12 KiB
C
592 lines
12 KiB
C
/*
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* Copyright (c) 1980 Regents of the University of California.
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* All rights reserved. The Berkeley software License Agreement
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* specifies the terms and conditions for redistribution.
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*/
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#ifndef lint
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char copyright[] =
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"@(#) Copyright (c) 1980 Regents of the University of California.\n\
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All rights reserved.\n";
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#endif not lint
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#ifndef lint
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static char sccsid[] = "@(#)main.c 1.1 92/07/30 SMI"; /* from UCB 5.7 10/1/87 */
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#endif not lint
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/*
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* getty -- adapt to terminal speed on dialup, and call login
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*
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* Melbourne getty, June 83, kre.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <sgtty.h>
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#include <signal.h>
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#include <ctype.h>
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#include <setjmp.h>
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#include <syslog.h>
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#include <sys/file.h>
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#include "gettytab.h"
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extern char **environ;
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struct sgttyb tmode = {
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0, 0, CERASE, CKILL, 0
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};
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struct tchars tc = {
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CINTR, CQUIT, CSTART,
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CSTOP, CEOF, CBRK,
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};
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struct ltchars ltc = {
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CSUSP, CDSUSP, CRPRNT,
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CFLUSH, CWERASE, CLNEXT
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};
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int crmod;
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int upper;
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int lower;
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int digit;
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char hostname[32];
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char name[16];
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char dev[] = "/dev/";
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char ctty[] = "/dev/console";
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char ttyn[32];
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char *portselector();
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char *ttyname();
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#define OBUFSIZ 128
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#define TABBUFSIZ 512
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char defent[TABBUFSIZ];
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char defstrs[TABBUFSIZ];
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char tabent[TABBUFSIZ];
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char tabstrs[TABBUFSIZ];
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char *env[128];
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char partab[] = {
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0001,0201,0201,0001,0201,0001,0001,0201,
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0202,0004,0003,0205,0005,0206,0201,0001,
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0201,0001,0001,0201,0001,0201,0201,0001,
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0001,0201,0201,0001,0201,0001,0001,0201,
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0200,0000,0000,0200,0000,0200,0200,0000,
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0000,0200,0200,0000,0200,0000,0000,0200,
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0000,0200,0200,0000,0200,0000,0000,0200,
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0200,0000,0000,0200,0000,0200,0200,0000,
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0200,0000,0000,0200,0000,0200,0200,0000,
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0000,0200,0200,0000,0200,0000,0000,0200,
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0000,0200,0200,0000,0200,0000,0000,0200,
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0200,0000,0000,0200,0000,0200,0200,0000,
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0000,0200,0200,0000,0200,0000,0000,0200,
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0200,0000,0000,0200,0000,0200,0200,0000,
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0200,0000,0000,0200,0000,0200,0200,0000,
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0000,0200,0200,0000,0200,0000,0000,0201
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};
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#define ERASE tmode.sg_erase
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#define KILL tmode.sg_kill
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#define EOT tc.t_eofc
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jmp_buf timeout;
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dingdong()
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{
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alarm(0);
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signal(SIGALRM, SIG_DFL);
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longjmp(timeout, 1);
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}
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jmp_buf intrupt;
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interrupt()
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{
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signal(SIGINT, interrupt);
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longjmp(intrupt, 1);
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}
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main(argc, argv)
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char *argv[];
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{
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char *tname;
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long allflags;
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int repcnt = 0;
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signal(SIGINT, SIG_IGN);
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/*
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signal(SIGQUIT, SIG_DFL);
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*/
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openlog("getty", LOG_ODELAY|LOG_CONS, LOG_AUTH);
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gethostname(hostname, sizeof(hostname));
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if (hostname[0] == '\0')
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strcpy(hostname, "Amnesiac");
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/*
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* The following is a work around for vhangup interactions
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* which cause great problems getting window systems started.
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* If the tty line is "-", we do the old style getty presuming
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* that the file descriptors are already set up for us.
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* J. Gettys - MIT Project Athena.
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*/
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if (argc <= 2 || strcmp(argv[2], "-") == 0)
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strcpy(ttyn, ttyname(0));
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else {
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strcpy(ttyn, dev);
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strncat(ttyn, argv[2], sizeof(ttyn)-sizeof(dev));
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if (strcmp(argv[0], "+") != 0) {
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/*
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* Reset owner/group/permissions of framebuffer devices
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*/
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(void) set_fb_attrs(ttyn, 0, 0);
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chown(ttyn, 0, 0);
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chmod(ttyn, 0622);
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/*
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* Delay the open so DTR stays down long enough to be detected.
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*/
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sleep(2);
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while (open(ttyn, O_RDWR) != 0) {
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if (repcnt % 10 == 0) {
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syslog(LOG_ERR, "%s: %m", ttyn);
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closelog();
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}
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repcnt++;
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sleep(60);
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}
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signal(SIGHUP, SIG_IGN);
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vhangup();
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(void) open(ttyn, O_RDWR);
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close(0);
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dup(1);
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dup(0);
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/*
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* grab the ctty even if someone else has it
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*/
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(void) ioctl(0, TIOCSCTTY, 1);
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signal(SIGHUP, SIG_DFL);
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}
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}
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if (!gettable("default", defent, defstrs))
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syslog(LOG_ERR, "Can't find \"default\" entry in gettytab");
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gendefaults();
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tname = "default";
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if (argc > 1)
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tname = argv[1];
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for (;;) {
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int ldisp = OTTYDISC;
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int off = 0;
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(void) gettable(tname, tabent, tabstrs);
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if (OPset || EPset || APset)
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APset++, OPset++, EPset++;
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setdefaults();
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ioctl(0, TIOCFLUSH, 0); /* clear out the crap */
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ioctl(0, FIONBIO, &off); /* turn off non-blocking mode */
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ioctl(0, FIOASYNC, &off); /* ditto for asynchronous mode */
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if (IS)
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tmode.sg_ispeed = speed(IS);
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else if (SP)
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tmode.sg_ispeed = speed(SP);
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if (OS)
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tmode.sg_ospeed = speed(OS);
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else if (SP)
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tmode.sg_ospeed = speed(SP);
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allflags = setflags(0);
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tmode.sg_flags = allflags & 0xffff;
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allflags >>= 16;
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ioctl(0, TIOCSETP, &tmode);
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ioctl(0, TIOCLSET, &allflags);
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setchars();
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ioctl(0, TIOCSETC, &tc);
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ioctl(0, TIOCSETD, &ldisp);
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if (HC)
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ioctl(0, TIOCHPCL, 0);
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ioctl(0, TIOCSETX, &off);
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if (MS)
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setmode(MS, 0);
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if (M0)
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setmode(M0, 0);
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if (AB) {
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extern char *autobaud();
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tname = autobaud();
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continue;
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}
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if (PS) {
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tname = portselector();
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continue;
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}
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if (DE > 0)
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sleep(DE); /* wait for the line to settle */
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if (CL && *CL)
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putpad(CL);
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edithost(HE);
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if (IM && *IM)
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putf(IM);
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if (setjmp(timeout)) {
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tmode.sg_ispeed = tmode.sg_ospeed = 0;
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ioctl(0, TIOCSETP, &tmode);
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exit(1);
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}
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if (TO) {
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signal(SIGALRM, dingdong);
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alarm(TO);
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}
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if (getname()) {
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register int i;
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oflush();
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alarm(0);
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signal(SIGALRM, SIG_DFL);
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if (name[0] == '-') {
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puts("login names may not start with '-'.");
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continue;
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}
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if (!(upper || lower || digit))
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continue;
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allflags = setflags(2);
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tmode.sg_flags = allflags & 0xffff;
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allflags >>= 16;
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if (crmod || NL)
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tmode.sg_flags |= CRMOD;
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if (upper || UC)
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tmode.sg_flags |= LCASE;
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if (lower || LC)
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tmode.sg_flags &= ~LCASE;
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ioctl(0, TIOCSETP, &tmode);
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ioctl(0, TIOCSLTC, <c);
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ioctl(0, TIOCLSET, &allflags);
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if (MS)
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setmode(MS, 0);
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if (M2)
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setmode(M2, 0);
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signal(SIGINT, SIG_DFL);
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for (i = 0; environ[i] != (char *)0; i++)
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env[i] = environ[i];
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makeenv(&env[i]);
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execle(LO, "login", "-p", name, (char *) 0, env);
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syslog(LOG_ERR, "%s: %m", LO);
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exit(1);
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}
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alarm(0);
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signal(SIGALRM, SIG_DFL);
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signal(SIGINT, SIG_IGN);
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if (NX && *NX)
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tname = NX;
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}
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}
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getname()
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{
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register char *np;
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register c;
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char cs;
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long allflags;
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/*
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* Interrupt may happen if we use CBREAK mode
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*/
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if (setjmp(intrupt)) {
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signal(SIGINT, SIG_IGN);
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return (0);
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}
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signal(SIGINT, interrupt);
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allflags = setflags(0);
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tmode.sg_flags = allflags & 0xffff;
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allflags >>= 16;
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ioctl(0, TIOCSETP, &tmode);
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ioctl(0, TIOCLSET, &allflags);
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if (MS)
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setmode(MS, 0);
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if (M0)
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setmode(M0, 0);
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allflags = setflags(1);
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tmode.sg_flags = allflags & 0xffff;
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allflags >>= 16;
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prompt();
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if (PF > 0) {
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oflush();
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sleep(PF);
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PF = 0;
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}
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ioctl(0, TIOCSETP, &tmode);
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ioctl(0, TIOCLSET, &allflags);
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if (MS)
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setmode(MS, 0);
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if (M1)
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setmode(M1, 0);
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crmod = 0;
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upper = 0;
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lower = 0;
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digit = 0;
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np = name;
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for (;;) {
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oflush();
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if (read(0, &cs, 1) <= 0)
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exit(0);
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if ((c = cs&0177) == 0)
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return (0);
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if (c == EOT)
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exit(1);
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if (c == '\r' || c == '\n' || np >= &name[sizeof name]) {
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putf("\r\n");
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break;
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}
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if (c >= 'a' && c <= 'z')
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lower++;
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else if (c >= 'A' && c <= 'Z')
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upper++;
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else if (c == ERASE || c == '#' || c == '\b') {
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if (np > name) {
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np--;
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if (tmode.sg_ospeed >= B1200)
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puts("\b \b");
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else
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putchr(cs);
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}
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continue;
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} else if (c == KILL || c == '@') {
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putchr(cs);
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putchr('\r');
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if (tmode.sg_ospeed < B1200)
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putchr('\n');
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/* this is the way they do it down under ... */
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else if (np > name)
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puts(" \r");
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prompt();
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np = name;
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continue;
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} else if (c >= '0' && c <= '9')
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digit++;
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if (IG && (c <= ' ' || c > 0176))
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continue;
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*np++ = c;
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putchr(cs);
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}
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signal(SIGINT, SIG_IGN);
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*np = 0;
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if (c == '\r')
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crmod++;
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if (upper && !lower && !LC || UC)
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for (np = name; *np; np++)
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if (isupper(*np))
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*np = tolower(*np);
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return (1);
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}
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static
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short tmspc10[] = {
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0, 2000, 1333, 909, 743, 666, 500, 333, 166, 83, 55, 41, 20, 10, 5, 15
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};
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putpad(s)
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register char *s;
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{
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register pad = 0;
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register mspc10;
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if (isdigit(*s)) {
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while (isdigit(*s)) {
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pad *= 10;
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pad += *s++ - '0';
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}
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pad *= 10;
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if (*s == '.' && isdigit(s[1])) {
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pad += s[1] - '0';
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s += 2;
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}
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}
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puts(s);
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/*
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* If no delay needed, or output speed is
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* not comprehensible, then don't try to delay.
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*/
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if (pad == 0)
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return;
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if (tmode.sg_ospeed <= 0 ||
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tmode.sg_ospeed >= (sizeof tmspc10 / sizeof tmspc10[0]))
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return;
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/*
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* Round up by a half a character frame,
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* and then do the delay.
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* Too bad there are no user program accessible programmed delays.
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* Transmitting pad characters slows many
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* terminals down and also loads the system.
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*/
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mspc10 = tmspc10[tmode.sg_ospeed];
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pad += mspc10 / 2;
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for (pad /= mspc10; pad > 0; pad--)
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putchr(*PC);
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}
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puts(s)
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register char *s;
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{
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while (*s)
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putchr(*s++);
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}
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char outbuf[OBUFSIZ];
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int obufcnt = 0;
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putchr(cc)
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{
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char c;
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c = cc;
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if (!P8) {
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c |= partab[c&0177] & 0200;
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if (OP)
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c ^= 0200;
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}
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if (!UB) {
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outbuf[obufcnt++] = c;
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if (obufcnt >= OBUFSIZ)
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oflush();
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} else
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write(1, &c, 1);
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}
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oflush()
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{
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if (obufcnt)
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write(1, outbuf, obufcnt);
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obufcnt = 0;
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}
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prompt()
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{
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putf(LM);
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if (CO)
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putchr('\n');
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}
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putf(cp)
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register char *cp;
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{
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char *ttyn, *slash;
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char datebuffer[60];
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extern char editedhost[];
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extern char *ttyname(), *rindex();
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while (*cp) {
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if (*cp != '%') {
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putchr(*cp++);
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continue;
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}
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switch (*++cp) {
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case 't':
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ttyn = ttyname(0);
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slash = rindex(ttyn, '/');
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if (slash == (char *) 0)
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puts(ttyn);
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else
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puts(&slash[1]);
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break;
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case 'h':
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puts(editedhost);
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break;
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case 'd':
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get_date(datebuffer);
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puts(datebuffer);
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break;
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case '%':
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putchr('%');
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break;
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}
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cp++;
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}
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}
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/*
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* set_fb_attrs -- change owner/group/permissions of framebuffers
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* listed in /etc/fbtab.
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*
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* Note:
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* Exiting from set_fb_attrs upon error is not advisable
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* since it would disable logins on console devices.
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*
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* File format:
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* console mode device_name[:device_name ...]
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* # begins a comment and may appear anywhere on a line.
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*
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* Example:
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* /dev/console 0660 /dev/fb:/dev/cgtwo0:/dev/bwtwo0
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* /dev/console 0660 /dev/gpone0a:/dev/gpone0b
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*
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* Description:
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* The example above sets the owner/group/permissions of the listed
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* devices to uid/gid/0660 if ttyn is /dev/console
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*/
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#define FIELD_DELIMS " \t\n"
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#define COLON ":"
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#define MAX_LINELEN 256
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#define FBTAB "/etc/fbtab"
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set_fb_attrs(ttyn, uid, gid)
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char *ttyn;
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int uid;
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int gid;
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{
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char line[MAX_LINELEN];
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char *console;
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char *mode_str;
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char *dev_list;
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char *device;
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char *ptr;
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int mode;
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long strtol();
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FILE *fp;
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if ((fp = fopen(FBTAB, "r")) == NULL)
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return;
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while (fgets(line, MAX_LINELEN, fp)) {
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if (ptr = strchr(line, '#'))
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*ptr = '\0'; /* handle comments */
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if ((console = strtok(line, FIELD_DELIMS)) == NULL)
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continue; /* ignore blank lines */
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if (strcmp(console, ttyn) != 0)
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continue; /* ignore non-consoles */
|
|
mode_str = strtok((char *)NULL, FIELD_DELIMS);
|
|
if (mode_str == NULL) {
|
|
(void) fprintf(stderr, "%s: invalid entry -- %s\n",
|
|
FBTAB, line);
|
|
continue;
|
|
}
|
|
/* convert string to octal value */
|
|
mode = (int) strtol(mode_str, (char **)NULL, 8);
|
|
if (mode < 0 || mode > 0777) {
|
|
(void) fprintf(stderr, "%s: invalid mode -- %s\n",
|
|
FBTAB, mode_str);
|
|
continue;
|
|
}
|
|
dev_list = strtok((char *)NULL, FIELD_DELIMS);
|
|
if (dev_list == NULL) {
|
|
(void) fprintf(stderr, "%s: %s -- empty device list\n",
|
|
FBTAB, console);
|
|
continue;
|
|
}
|
|
device = strtok(dev_list, COLON);
|
|
while (device) {
|
|
(void) chown(device, uid, gid);
|
|
(void) chmod(device, mode);
|
|
device = strtok((char *)NULL, COLON);
|
|
}
|
|
}
|
|
(void) fclose(fp);
|
|
}
|