/* $NetBSD: main.c,v 1.25 1998/03/30 01:52:02 mrg Exp $ */ /*- * Copyright (c) 1980, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include #ifndef lint __COPYRIGHT("@(#) Copyright (c) 1980, 1993\n\ The Regents of the University of California. All rights reserved.\n"); #endif /* not lint */ #ifndef lint #if 0 static char sccsid[] = "from: @(#)main.c 8.1 (Berkeley) 6/20/93"; #else __RCSID("$NetBSD: main.c,v 1.25 1998/03/30 01:52:02 mrg Exp $"); #endif #endif /* not lint */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "gettytab.h" #include "pathnames.h" #include "extern.h" extern char *__progname; /* * Set the amount of running time that getty should accumulate * before deciding that something is wrong and exit. */ #define GETTY_TIMEOUT 60 /* seconds */ struct termios tmode, omode; int crmod, digit, lower, upper; char hostname[MAXHOSTNAMELEN]; struct utsname kerninfo; char name[16]; char dev[] = _PATH_DEV; char ttyn[32]; char lockfile[512]; uid_t ttyowner; #define OBUFSIZ 128 #define TABBUFSIZ 512 char defent[TABBUFSIZ]; char tabent[TABBUFSIZ]; char *env[128]; char partab[] = { 0001,0201,0201,0001,0201,0001,0001,0201, 0202,0004,0003,0205,0005,0206,0201,0001, 0201,0001,0001,0201,0001,0201,0201,0001, 0001,0201,0201,0001,0201,0001,0001,0201, 0200,0000,0000,0200,0000,0200,0200,0000, 0000,0200,0200,0000,0200,0000,0000,0200, 0000,0200,0200,0000,0200,0000,0000,0200, 0200,0000,0000,0200,0000,0200,0200,0000, 0200,0000,0000,0200,0000,0200,0200,0000, 0000,0200,0200,0000,0200,0000,0000,0200, 0000,0200,0200,0000,0200,0000,0000,0200, 0200,0000,0000,0200,0000,0200,0200,0000, 0000,0200,0200,0000,0200,0000,0000,0200, 0200,0000,0000,0200,0000,0200,0200,0000, 0200,0000,0000,0200,0000,0200,0200,0000, 0000,0200,0200,0000,0200,0000,0000,0201 }; #define ERASE tmode.c_cc[VERASE] #define KILL tmode.c_cc[VKILL] #define EOT tmode.c_cc[VEOF] static void dingdong __P((int)); static void interrupt __P((int)); void timeoverrun __P((int)); jmp_buf timeout; static void dingdong(signo) int signo; { alarm(0); signal(SIGALRM, SIG_DFL); longjmp(timeout, 1); } jmp_buf intrupt; static void interrupt(signo) int signo; { signal(SIGINT, interrupt); longjmp(intrupt, 1); } /* * Action to take when getty is running too long. */ void timeoverrun(signo) int signo; { syslog(LOG_ERR, "getty exiting due to excessive running time\n"); exit(1); } int main __P((int, char **)); static int getname __P((void)); static void oflush __P((void)); static void prompt __P((void)); static void putchr __P((int)); static void putf __P((const char *)); static void putpad __P((const char *)); static void xputs __P((const char *)); int main(argc, argv) int argc; char *argv[]; { extern char **environ; char *tname; int repcnt = 0, failopenlogged = 0, uugetty = 0; struct rlimit limit; struct passwd *pw; #ifdef __GNUC__ (void)&tname; /* XXX gcc -Wall */ #endif signal(SIGINT, SIG_IGN); /* signal(SIGQUIT, SIG_DFL); */ openlog("getty", LOG_ODELAY|LOG_CONS|LOG_PID, LOG_AUTH); gethostname(hostname, sizeof(hostname)); if (hostname[0] == '\0') strcpy(hostname, "Amnesiac"); uname(&kerninfo); if (__progname[0] == 'u' && __progname[1] == 'u') uugetty = 1; /* * Find id of uucp login (if present) so we can chown tty properly. */ if (uugetty && (pw = getpwnam("uucp"))) ttyowner = pw->pw_uid; else ttyowner = 0; /* * Limit running time to deal with broken or dead lines. */ (void)signal(SIGXCPU, timeoverrun); limit.rlim_max = RLIM_INFINITY; limit.rlim_cur = GETTY_TIMEOUT; (void)setrlimit(RLIMIT_CPU, &limit); /* * The following is a work around for vhangup interactions * which cause great problems getting window systems started. * If the tty line is "-", we do the old style getty presuming * that the file descriptors are already set up for us. * J. Gettys - MIT Project Athena. */ if (argc <= 2 || strcmp(argv[2], "-") == 0) { strncpy(ttyn, ttyname(0), 32); ttyn[31] = (char)NULL; } else { int i; strcpy(ttyn, dev); strncat(ttyn, argv[2], sizeof(ttyn)-sizeof(dev)); if (uugetty) { chown(ttyn, ttyowner, 0); strcpy(lockfile, _PATH_LOCK); strncat(lockfile, argv[2], sizeof(lockfile)-sizeof(_PATH_LOCK)); /* wait for lockfiles to go away before we try to open */ if ( pidlock(lockfile, 0, 0, 0) != 0 ) { syslog(LOG_ERR, "%s: can't create lockfile", ttyn); exit(1); } unlink(lockfile); } if (strcmp(argv[0], "+") != 0) { chown(ttyn, ttyowner, 0); chmod(ttyn, 0600); revoke(ttyn); if (ttyaction(ttyn, "getty", "root")) syslog(LOG_ERR,"%s: ttyaction failed", ttyn); /* * Delay the open so DTR stays down long enough to be detected. */ sleep(2); while ((i = open(ttyn, O_RDWR)) == -1) { if ((repcnt % 10 == 0) && (errno != ENXIO || !failopenlogged)) { syslog(LOG_ERR, "%s: %m", ttyn); closelog(); failopenlogged = 1; } repcnt++; sleep(60); } if (uugetty && pidlock(lockfile, 0, 0, 0) != 0) { syslog(LOG_ERR, "%s: can't create lockfile", ttyn); exit(1); } (void) chown(lockfile, ttyowner, 0); login_tty(i); } } /* Start with default tty settings */ if (tcgetattr(0, &tmode) < 0) { syslog(LOG_ERR, "%s: %m", ttyn); exit(1); } omode = tmode; gettable("default", defent); gendefaults(); tname = "default"; if (argc > 1) tname = argv[1]; for (;;) { int off; gettable(tname, tabent); if (OPset || EPset || APset) APset++, OPset++, EPset++; setdefaults(); off = 0; (void)tcflush(0, TCIOFLUSH); /* clear out the crap */ ioctl(0, FIONBIO, &off); /* turn off non-blocking mode */ ioctl(0, FIOASYNC, &off); /* ditto for async mode */ if (IS) cfsetispeed(&tmode, IS); else if (SP) cfsetispeed(&tmode, SP); if (OS) cfsetospeed(&tmode, OS); else if (SP) cfsetospeed(&tmode, SP); setflags(0); setchars(); if (tcsetattr(0, TCSANOW, &tmode) < 0) { syslog(LOG_ERR, "%s: %m", ttyn); exit(1); } if (AB) { tname = autobaud(); continue; } if (PS) { tname = portselector(); continue; } if (CL && *CL) putpad(CL); edithost(HE); if (IM && *IM) putf(IM); if (setjmp(timeout)) { tmode.c_ispeed = tmode.c_ospeed = 0; (void)tcsetattr(0, TCSANOW, &tmode); exit(1); } if (TO) { signal(SIGALRM, dingdong); alarm(TO); } if (getname()) { int i; oflush(); alarm(0); signal(SIGALRM, SIG_DFL); if (name[0] == '-') { xputs("user names may not start with '-'."); continue; } if (!(upper || lower || digit)) continue; setflags(2); if (crmod) { tmode.c_iflag |= ICRNL; tmode.c_oflag |= ONLCR; } #if XXX if (upper || UC) tmode.sg_flags |= LCASE; if (lower || LC) tmode.sg_flags &= ~LCASE; #endif if (tcsetattr(0, TCSANOW, &tmode) < 0) { syslog(LOG_ERR, "%s: %m", ttyn); exit(1); } signal(SIGINT, SIG_DFL); for (i = 0; environ[i] != (char *)0; i++) env[i] = environ[i]; makeenv(&env[i]); limit.rlim_max = RLIM_INFINITY; limit.rlim_cur = RLIM_INFINITY; (void)setrlimit(RLIMIT_CPU, &limit); execle(LO, "login", "-p", "--", name, (char *)0, env); syslog(LOG_ERR, "%s: %m", LO); exit(1); } alarm(0); signal(SIGALRM, SIG_DFL); signal(SIGINT, SIG_IGN); if (NX && *NX) tname = NX; unlink(lockfile); } } static int getname() { int c; char *np; char cs; /* * Interrupt may happen if we use CBREAK mode */ if (setjmp(intrupt)) { signal(SIGINT, SIG_IGN); return (0); } signal(SIGINT, interrupt); setflags(1); prompt(); if (PF > 0) { oflush(); sleep(PF); PF = 0; } if (tcsetattr(0, TCSANOW, &tmode) < 0) { syslog(LOG_ERR, "%s: %m", ttyn); exit(1); } crmod = digit = lower = upper = 0; np = name; for (;;) { oflush(); if (read(STDIN_FILENO, &cs, 1) <= 0) exit(0); if ((c = cs&0177) == 0) return (0); if (c == EOT) exit(1); if (c == '\r' || c == '\n' || np >= &name[sizeof name]) { putf("\r\n"); break; } if (islower(c)) lower = 1; else if (isupper(c)) upper = 1; else if (c == ERASE || c == '#' || c == '\b') { if (np > name) { np--; if (cfgetospeed(&tmode) >= 1200) xputs("\b \b"); else putchr(cs); } continue; } else if (c == KILL || c == '@') { putchr(cs); putchr('\r'); if (cfgetospeed(&tmode) < 1200) putchr('\n'); /* this is the way they do it down under ... */ else if (np > name) xputs( " \r"); prompt(); np = name; continue; } else if (isdigit(c)) digit++; if (IG && (c <= ' ' || c > 0176)) continue; *np++ = c; putchr(cs); } signal(SIGINT, SIG_IGN); *np = 0; if (c == '\r') crmod = 1; if ((upper && !lower && !LC) || UC) for (np = name; *np; np++) if (isupper(*np)) *np = tolower(*np); return (1); } static void putpad(s) const char *s; { int pad = 0; speed_t ospeed = cfgetospeed(&tmode); if (isdigit(*s)) { while (isdigit(*s)) { pad *= 10; pad += *s++ - '0'; } pad *= 10; if (*s == '.' && isdigit(s[1])) { pad += s[1] - '0'; s += 2; } } xputs(s); /* * If no delay needed, or output speed is * not comprehensible, then don't try to delay. */ if (pad == 0 || ospeed <= 0) return; /* * Round up by a half a character frame, and then do the delay. * Too bad there are no user program accessible programmed delays. * Transmitting pad characters slows many terminals down and also * loads the system. */ pad = (pad * ospeed + 50000) / 100000; while (pad--) putchr(*PC); } static void xputs(s) const char *s; { while (*s) putchr(*s++); } char outbuf[OBUFSIZ]; int obufcnt = 0; static void putchr(cc) int cc; { char c; c = cc; if (!NP) { c |= partab[c&0177] & 0200; if (OP) c ^= 0200; } if (!UB) { outbuf[obufcnt++] = c; if (obufcnt >= OBUFSIZ) oflush(); } else write(STDOUT_FILENO, &c, 1); } static void oflush() { if (obufcnt) write(STDOUT_FILENO, outbuf, obufcnt); obufcnt = 0; } static void prompt() { putf(LM); if (CO) putchr('\n'); } static void putf(cp) const char *cp; { extern char editedhost[]; time_t t; char *slash, db[100]; while (*cp) { if (*cp != '%') { putchr(*cp++); continue; } switch (*++cp) { case 't': slash = strrchr(ttyn, '/'); if (slash == (char *) 0) xputs(ttyn); else xputs(&slash[1]); break; case 'h': xputs(editedhost); break; case 'd': { static char fmt[] = "%l:% %p on %A, %d %B %Y"; fmt[4] = 'M'; /* I *hate* SCCS... */ (void)time(&t); (void)strftime(db, sizeof(db), fmt, localtime(&t)); xputs(db); break; case 's': xputs(kerninfo.sysname); break; case 'm': xputs(kerninfo.machine); break; case 'r': xputs(kerninfo.release); break; case 'v': xputs(kerninfo.version); break; } case '%': putchr('%'); break; } cp++; } }