diff options
Diffstat (limited to 'getty.c')
| -rw-r--r-- | getty.c | 1232 |
1 files changed, 0 insertions, 1232 deletions
diff --git a/getty.c b/getty.c deleted file mode 100644 index c6d0eb7..0000000 --- a/getty.c +++ /dev/null @@ -1,1232 +0,0 @@ -/* vi: set sw=4 ts=4: */ -/* agetty.c - another getty program for Linux. By W. Z. Venema 1989 - Ported to Linux by Peter Orbaek <poe@daimi.aau.dk> - This program is freely distributable. The entire man-page used to - be here. Now read the real man-page agetty.8 instead. - - -f option added by Eric Rasmussen <ear@usfirst.org> - 12/28/95 - - 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@misiek.eu.org> - - added Native Language Support - - 1999-05-05 Thorsten Kranzkowski <dl8bcu@gmx.net> - - enable hardware flow control before displaying /etc/issue - -*/ - -#include <stdio.h> -#include <stdlib.h> -#include <unistd.h> -#include <string.h> -#include <sys/ioctl.h> -#include <errno.h> -#include <sys/stat.h> -#include <sys/signal.h> -#include <fcntl.h> -#include <stdarg.h> -#include <ctype.h> -#include <utmp.h> -#include <getopt.h> -#include <termios.h> -#include "busybox.h" - -#define _PATH_LOGIN "/bin/login" - -#ifdef linux -#include <sys/param.h> -#define USE_SYSLOG -#endif - -extern void updwtmp(const char *filename, const struct utmp *ut); - - /* If USE_SYSLOG is undefined all diagnostics go directly to /dev/console. */ -#ifdef USE_SYSLOG -#include <syslog.h> -#endif - - - /* - * Some heuristics to find out what environment we are in: if it is not - * System V, assume it is SunOS 4. - */ - -#ifdef LOGIN_PROCESS /* defined in System V utmp.h */ -#define SYSV_STYLE /* select System V style getty */ -#endif - - /* - * Things you may want to modify. - * - * If ISSUE is not defined, agetty will never display the contents of the - * /etc/issue file. You will not want to spit out large "issue" files at the - * wrong baud rate. Relevant for System V only. - * - * You may disagree with the default line-editing etc. characters defined - * below. Note, however, that DEL cannot be used for interrupt generation - * and for line editing at the same time. - */ - -#ifdef SYSV_STYLE -#define ISSUE "/etc/issue" /* displayed before the login prompt */ -#include <sys/utsname.h> -#include <time.h> -#endif - -#define LOGIN " login: " /* login prompt */ - -/* Some shorthands for control characters. */ - -#define CTL(x) (x ^ 0100) /* Assumes ASCII dialect */ -#define CR CTL('M') /* carriage return */ -#define NL CTL('J') /* line feed */ -#define BS CTL('H') /* back space */ -#define DEL CTL('?') /* delete */ - -/* Defaults for line-editing etc. characters; you may want to change this. */ - -#define DEF_ERASE DEL /* default erase character */ -#define DEF_INTR CTL('C') /* default interrupt character */ -#define DEF_QUIT CTL('\\') /* default quit char */ -#define DEF_KILL CTL('U') /* default kill char */ -#define DEF_EOF CTL('D') /* default EOF char */ -#define DEF_EOL 0 -#define DEF_SWITCH 0 /* default switch char */ - - /* - * SunOS 4.1.1 termio is broken. We must use the termios stuff instead, - * because the termio -> termios translation does not clear the termios - * CIBAUD bits. Therefore, the tty driver would sometimes report that input - * baud rate != output baud rate. I did not notice that problem with SunOS - * 4.1. We will use termios where available, and termio otherwise. - */ - -/* linux 0.12 termio is broken too, if we use it c_cc[VERASE] isn't set - properly, but all is well if we use termios?! */ - -#ifdef TCGETS -#undef TCGETA -#undef TCSETA -#undef TCSETAW -#define termio termios -#define TCGETA TCGETS -#define TCSETA TCSETS -#define TCSETAW TCSETSW -#endif - - /* - * This program tries to not use the standard-i/o library. This keeps the - * executable small on systems that do not have shared libraries (System V - * Release <3). - */ -#ifndef BUFSIZ -#define BUFSIZ 1024 -#endif - - /* - * When multiple baud rates are specified on the command line, the first one - * we will try is the first one specified. - */ - -#define FIRST_SPEED 0 - -/* Storage for command-line options. */ - -#define MAX_SPEED 10 /* max. nr. of baud rates */ - -struct options { - int flags; /* toggle switches, see below */ - int timeout; /* time-out period */ - char *login; /* login program */ - char *tty; /* name of tty */ - char *initstring; /* modem init string */ - char *issue; /* alternative issue file */ - int numspeed; /* number of baud rates to try */ - int speeds[MAX_SPEED]; /* baud rates to be tried */ -}; - -#define F_PARSE (1<<0) /* process modem status messages */ -#define F_ISSUE (1<<1) /* display /etc/issue */ -#define F_RTSCTS (1<<2) /* enable RTS/CTS flow control */ -#define F_LOCAL (1<<3) /* force local */ -#define F_INITSTRING (1<<4) /* initstring is set */ -#define F_WAITCRLF (1<<5) /* wait for CR or LF */ -#define F_CUSTISSUE (1<<6) /* give alternative issue file */ -#define F_NOPROMPT (1<<7) /* don't ask for login name! */ - -/* Storage for things detected while the login name was read. */ - -struct chardata { - int erase; /* erase character */ - int kill; /* kill character */ - int eol; /* end-of-line character */ - int parity; /* what parity did we see */ - int capslock; /* upper case without lower case */ -}; - -/* Initial values for the above. */ - -struct chardata init_chardata = { - DEF_ERASE, /* default erase character */ - DEF_KILL, /* default kill character */ - 13, /* default eol char */ - 0, /* space parity */ - 0, /* no capslock */ -}; - -struct Speedtab { - long speed; - int code; -}; - -static struct Speedtab speedtab[] = { - {50, B50}, - {75, B75}, - {110, B110}, - {134, B134}, - {150, B150}, - {200, B200}, - {300, B300}, - {600, B600}, - {1200, B1200}, - {1800, B1800}, - {2400, B2400}, - {4800, B4800}, - {9600, B9600}, -#ifdef B19200 - {19200, B19200}, -#endif -#ifdef B38400 - {38400, B38400}, -#endif -#ifdef EXTA - {19200, EXTA}, -#endif -#ifdef EXTB - {38400, EXTB}, -#endif -#ifdef B57600 - {57600, B57600}, -#endif -#ifdef B115200 - {115200, B115200}, -#endif -#ifdef B230400 - {230400, B230400}, -#endif - {0, 0}, -}; - -void parse_args(int argc, char **argv, struct options *op); -void parse_speeds(struct options *op, char *arg); -void update_utmp(char *line); -void open_tty(char *tty, struct termio *tp, int local); -void termio_init(struct termio *tp, int speed, struct options *op); -void auto_baud(struct termio *tp); -void do_prompt(struct options *op, struct termio *tp); -void next_speed(struct termio *tp, struct options *op); -char *get_logname(struct options *op, struct chardata *cp, - - struct termio *tp); -void termio_final(struct options *op, struct termio *tp, - - struct chardata *cp); -int caps_lock(char *s); -int bcode(char *s); -static void error(const char *fmt, ...); - -/* The following is used for understandable diagnostics. */ - -char *progname; - -/* Fake hostname for ut_host specified on command line. */ -char *fakehost = NULL; - -/* ... */ -#ifdef DEBUGGING -#define debug(s) fprintf(dbf,s); fflush(dbf) -#define DEBUGTERM "/dev/ttyp0" -FILE *dbf; -#else -#define debug(s) /* nothing */ -#endif - -int getty_main(int argc, char **argv) -{ - char *logname = NULL; /* login name, given to /bin/login */ - struct chardata chardata; /* set by get_logname() */ - struct termio termio; /* terminal mode bits */ - static struct options options = { - F_ISSUE, /* show /etc/issue (SYSV_STYLE) */ - 0, /* no timeout */ - _PATH_LOGIN, /* default login program */ - "tty1", /* default tty line */ - "", /* modem init string */ - ISSUE, /* default issue file */ - 0, /* no baud rates known yet */ - }; - - /* The BSD-style init command passes us a useless process name. */ - -#ifdef SYSV_STYLE - progname = argv[0]; -#else - progname = "getty"; -#endif - -#ifdef DEBUGGING - dbf = xfopen(DEBUGTERM, "w"); - - { - int i; - - for (i = 1; i < argc; i++) { - debug(argv[i]); - debug("\n"); - } - } -#endif - - /* Parse command-line arguments. */ - - parse_args(argc, argv, &options); - -#ifdef __linux__ - setsid(); -#endif - - /* Update the utmp file. */ - -#ifdef SYSV_STYLE - update_utmp(options.tty); -#endif - - debug("calling open_tty\n"); - /* Open the tty as standard { input, output, error }. */ - open_tty(options.tty, &termio, options.flags & F_LOCAL); - -#ifdef __linux__ - { - int iv; - - iv = getpid(); - if (ioctl(0, TIOCSPGRP, &iv) < 0) - perror_msg("ioctl() TIOCSPGRP call failed"); - } -#endif - /* Initialize the termio settings (raw mode, eight-bit, blocking i/o). */ - debug("calling termio_init\n"); - termio_init(&termio, options.speeds[FIRST_SPEED], &options); - - /* write the modem init string and DON'T flush the buffers */ - if (options.flags & F_INITSTRING) { - debug("writing init string\n"); - write(1, options.initstring, strlen(options.initstring)); - } - - if (!(options.flags & F_LOCAL)) { - /* go to blocking write mode unless -L is specified */ - fcntl(1, F_SETFL, fcntl(1, F_GETFL, 0) & ~O_NONBLOCK); - } - - /* Optionally detect the baud rate from the modem status message. */ - debug("before autobaud\n"); - if (options.flags & F_PARSE) - auto_baud(&termio); - - /* Set the optional timer. */ - if (options.timeout) - (void) alarm((unsigned) options.timeout); - - /* optionally wait for CR or LF before writing /etc/issue */ - if (options.flags & F_WAITCRLF) { - char ch; - - debug("waiting for cr-lf\n"); - while (read(0, &ch, 1) == 1) { - ch &= 0x7f; /* strip "parity bit" */ -#ifdef DEBUGGING - fprintf(dbf, "read %c\n", ch); -#endif - if (ch == '\n' || ch == '\r') - break; - } - } - - chardata = init_chardata; - if (!(options.flags & F_NOPROMPT)) { - /* Read the login name. */ - debug("reading login name\n"); - /* while ((logname = get_logname(&options, &chardata, &termio)) == 0) */ - while ((logname = get_logname(&options, &chardata, &termio)) == - NULL) next_speed(&termio, &options); - } - - /* Disable timer. */ - - if (options.timeout) - (void) alarm(0); - - /* Finalize the termio settings. */ - - termio_final(&options, &termio, &chardata); - - /* Now the newline character should be properly written. */ - - (void) write(1, "\n", 1); - - /* Let the login program take care of password validation. */ - - (void) execl(options.login, options.login, "--", logname, (char *) 0); - error("%s: can't exec %s: %m", options.tty, options.login); - return (0); /* quiet GCC */ -} - -/* parse-args - parse command-line arguments */ - -void parse_args(argc, argv, op) -int argc; -char **argv; -struct options *op; -{ - extern char *optarg; /* getopt */ - extern int optind; /* getopt */ - int c; - - while (isascii(c = getopt(argc, argv, "I:LH:f:hil:mt:wn"))) { - switch (c) { - case 'I': - if (!(op->initstring = malloc(strlen(optarg)))) { - error("can't malloc initstring"); - break; - } - { - char ch, *p, *q; - int i; - - /* copy optarg into op->initstring decoding \ddd - octal codes into chars */ - q = op->initstring; - p = optarg; - while (*p) { - if (*p == '\\') { /* know \\ means \ */ - p++; - if (*p == '\\') { - ch = '\\'; - p++; - } else { /* handle \000 - \177 */ - ch = 0; - for (i = 1; i <= 3; i++) { - if (*p >= '0' && *p <= '7') { - ch <<= 3; - ch += *p - '0'; - p++; - } else - break; - } - } - *q++ = ch; - } else { - *q++ = *p++; - } - } - *q = '\0'; - } - op->flags |= F_INITSTRING; - break; - - case 'L': /* force local */ - op->flags |= F_LOCAL; - break; - case 'H': /* fake login host */ - fakehost = optarg; - break; - case 'f': /* custom issue file */ - op->flags |= F_CUSTISSUE; - op->issue = optarg; - break; - case 'h': /* enable h/w flow control */ - op->flags |= F_RTSCTS; - break; - case 'i': /* do not show /etc/issue */ - op->flags &= ~F_ISSUE; - break; - case 'l': - op->login = optarg; /* non-default login program */ - break; - case 'm': /* parse modem status message */ - op->flags |= F_PARSE; - break; - case 'n': - op->flags |= F_NOPROMPT; - break; - case 't': /* time out */ - if ((op->timeout = atoi(optarg)) <= 0) - error("bad timeout value: %s", optarg); - break; - case 'w': - op->flags |= F_WAITCRLF; - break; - default: - show_usage(); - } - } - debug("after getopt loop\n"); - if (argc < optind + 2) /* check parameter count */ - show_usage(); - - /* we loosen up a bit and accept both "baudrate tty" and "tty baudrate" */ - if ('0' <= argv[optind][0] && argv[optind][0] <= '9') { - /* a number first, assume it's a speed (BSD style) */ - parse_speeds(op, argv[optind++]); /* baud rate(s) */ - op->tty = argv[optind]; /* tty name */ - } else { - op->tty = argv[optind++]; /* tty name */ - parse_speeds(op, argv[optind]); /* baud rate(s) */ - } - - optind++; - if (argc > optind && argv[optind]) - setenv("TERM", argv[optind], 1); - - debug("exiting parseargs\n"); -} - -/* parse_speeds - parse alternate baud rates */ - -void parse_speeds(op, arg) -struct options *op; -char *arg; -{ - char *strtok(); - char *cp; - - debug("entered parse_speeds\n"); - for (cp = strtok(arg, ","); cp != 0; cp = strtok((char *) 0, ",")) { - if ((op->speeds[op->numspeed++] = bcode(cp)) <= 0) - error("bad speed: %s", cp); - if (op->numspeed > MAX_SPEED) - error("too many alternate speeds"); - } - debug("exiting parsespeeds\n"); -} - -#ifdef SYSV_STYLE - -/* update_utmp - update our utmp entry */ -void update_utmp(line) -char *line; -{ - struct utmp ut; - int mypid = getpid(); - long time(); - long lseek(); -#ifndef __UCLIBC__ - time_t t; - struct utmp *utp; -#endif - -#if ! (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 1)) - struct flock lock; -#endif - - /* - * The utmp file holds miscellaneous information about things started by - * /sbin/init and other system-related events. Our purpose is to update - * the utmp entry for the current process, in particular the process type - * and the tty line we are listening to. Return successfully only if the - * utmp file can be opened for update, and if we are able to find our - * entry in the utmp file. - */ - -#ifndef __UCLIBC__ - utmpname(_PATH_UTMP); - setutent(); - while ((utp = getutent()) - && !(utp->ut_type == INIT_PROCESS && utp->ut_pid == mypid)) /* nothing */ - ; - - if (utp) { - memcpy(&ut, utp, sizeof(ut)); - } else { - /* some inits don't initialize utmp... */ - memset(&ut, 0, sizeof(ut)); - strncpy(ut.ut_id, line + 3, sizeof(ut.ut_id)); - } - /*endutent(); */ - - strncpy(ut.ut_user, "LOGIN", sizeof(ut.ut_user)); - strncpy(ut.ut_line, line, sizeof(ut.ut_line)); - if (fakehost) - strncpy(ut.ut_host, fakehost, sizeof(ut.ut_host)); - time(&t); - ut.ut_time = t; - ut.ut_type = LOGIN_PROCESS; - ut.ut_pid = mypid; - - pututline(&ut); - endutent(); - - { - updwtmp(_PATH_WTMP, &ut); - } -#else /* not __linux__ */ - { - int ut_fd; - - if ((ut_fd = open(_PATH_WTMP, 2)) < 0) { - error("%s: open for update: %m"), _PATH_WTMP; - } else { - long ut_size = sizeof(ut); /* avoid nonsense */ - - while (read(ut_fd, (char *) &ut, sizeof(ut)) == sizeof(ut)) { - if (ut.ut_type == INIT_PROCESS && ut.ut_pid == mypid) { - ut.ut_type = LOGIN_PROCESS; - ut.ut_time = time((long *) 0); - (void) strncpy(ut.ut_name, "LOGIN", sizeof(ut.ut_name)); - (void) strncpy(ut.ut_line, line, sizeof(ut.ut_line)); - if (fakehost) - (void) strncpy(ut.ut_host, fakehost, sizeof(ut.ut_host)); - (void) lseek(ut_fd, -ut_size, 1); - (void) write(ut_fd, (char *) &ut, sizeof(ut)); - (void) close(ut_fd); - return; - } - } - error("%s: no utmp entry", line); - } - } -#endif /* __linux__ */ -} - -#endif - -/* open_tty - set up tty as standard { input, output, error } */ -void open_tty(tty, tp, local) -char *tty; -struct termio *tp; -int local; -{ - /* Get rid of the present standard { output, error} if any. */ - - (void) close(1); - (void) close(2); - errno = 0; /* ignore above errors */ - - /* Set up new standard input, unless we are given an already opened port. */ - - if (strcmp(tty, "-")) { - struct stat st; - - /* Sanity checks... */ - - if (chdir("/dev")) - error("/dev: chdir() failed: %m"); - if (stat(tty, &st) < 0) - error("/dev/%s: %m", tty); - if ((st.st_mode & S_IFMT) != S_IFCHR) - error("/dev/%s: not a character device", tty); - - /* Open the tty as standard input. */ - - (void) close(0); - errno = 0; /* ignore close(2) errors */ - - debug("open(2)\n"); - if (open(tty, O_RDWR | O_NONBLOCK, 0) != 0) - error("/dev/%s: cannot open as standard input: %m", tty); - - } else { - - /* - * Standard input should already be connected to an open port. Make - * sure it is open for read/write. - */ - - if ((fcntl(0, F_GETFL, 0) & O_RDWR) != O_RDWR) - error("%s: not open for read/write", tty); - } - - /* Set up standard output and standard error file descriptors. */ - debug("duping\n"); - if (dup(0) != 1 || dup(0) != 2) /* set up stdout and stderr */ - error("%s: dup problem: %m", tty); /* we have a problem */ - - /* - * The following ioctl will fail if stdin is not a tty, but also when - * there is noise on the modem control lines. In the latter case, the - * common course of action is (1) fix your cables (2) give the modem more - * time to properly reset after hanging up. SunOS users can achieve (2) - * by patching the SunOS kernel variable "zsadtrlow" to a larger value; - * 5 seconds seems to be a good value. - */ - - if (ioctl(0, TCGETA, tp) < 0) - error("%s: ioctl: %m", tty); - - /* - * It seems to be a terminal. Set proper protections and ownership. Mode - * 0622 is suitable for SYSV <4 because /bin/login does not change - * protections. SunOS 4 login will change the protections to 0620 (write - * access for group tty) after the login has succeeded. - */ - -#ifdef DEBIAN - { - /* tty to root.dialout 660 */ - struct group *gr; - int id; - - id = (gr = getgrnam("dialout")) ? gr->gr_gid : 0; - chown(tty, 0, id); - chmod(tty, 0660); - - /* vcs,vcsa to root.sys 600 */ - if (!strncmp(tty, "tty", 3) && isdigit(tty[3])) { - char *vcs, *vcsa; - - if (!(vcs = malloc(strlen(tty)))) - error("Can't malloc for vcs"); - if (!(vcsa = malloc(strlen(tty) + 1))) - error("Can't malloc for vcsa"); - strcpy(vcs, "vcs"); - strcpy(vcs + 3, tty + 3); - strcpy(vcsa, "vcsa"); - strcpy(vcsa + 4, tty + 3); - - id = (gr = getgrnam("sys")) ? gr->gr_gid : 0; - chown(vcs, 0, id); - chmod(vcs, 0600); - chown(vcsa, 0, id); - chmod(vcs, 0600); - - free(vcs); - free(vcsa); - } - } -#else - (void) chown(tty, 0, 0); /* root, sys */ - (void) chmod(tty, 0622); /* crw--w--w- */ - errno = 0; /* ignore above errors */ -#endif -} - -/* termio_init - initialize termio settings */ - -char gbuf[1024]; -char area[1024]; - -void termio_init(tp, speed, op) -struct termio *tp; -int speed; -struct options *op; -{ - - /* - * Initial termio settings: 8-bit characters, raw-mode, blocking i/o. - * Special characters are set after we have read the login name; all - * reads will be done in raw mode anyway. Errors will be dealt with - * lateron. - */ -#ifdef __linux__ - /* flush input and output queues, important for modems! */ - (void) ioctl(0, TCFLSH, TCIOFLUSH); -#endif - - tp->c_cflag = CS8 | HUPCL | CREAD | speed; - if (op->flags & F_LOCAL) { - tp->c_cflag |= CLOCAL; - } - - tp->c_iflag = tp->c_lflag = tp->c_oflag = tp->c_line = 0; - tp->c_cc[VMIN] = 1; - tp->c_cc[VTIME] = 0; - - /* Optionally enable hardware flow control */ - -#ifdef CRTSCTS - if (op->flags & F_RTSCTS) - tp->c_cflag |= CRTSCTS; -#endif - - (void) ioctl(0, TCSETA, tp); - - /* go to blocking input even in local mode */ - fcntl(0, F_SETFL, fcntl(0, F_GETFL, 0) & ~O_NONBLOCK); - - debug("term_io 2\n"); -} - -/* auto_baud - extract baud rate from modem status message */ -void auto_baud(tp) -struct termio *tp; -{ - int speed; - int vmin; - unsigned iflag; - char buf[BUFSIZ]; - char *bp; - int nread; - - /* - * This works only if the modem produces its status code AFTER raising - * the DCD line, and if the computer is fast enough to set the proper - * baud rate before the message has gone by. We expect a message of the - * following format: - * - * <junk><number><junk> - * - * The number is interpreted as the baud rate of the incoming call. If the - * modem does not tell us the baud rate within one second, we will keep - * using the current baud rate. It is advisable to enable BREAK - * processing (comma-separated list of baud rates) if the processing of - * modem status messages is enabled. - */ - - /* - * Use 7-bit characters, don't block if input queue is empty. Errors will - * be dealt with lateron. - */ - - iflag = tp->c_iflag; - tp->c_iflag |= ISTRIP; /* enable 8th-bit stripping */ - vmin = tp->c_cc[VMIN]; - tp->c_cc[VMIN] = 0; /* don't block if queue empty */ - (void) ioctl(0, TCSETA, tp); - - /* - * Wait for a while, then read everything the modem has said so far and - * try to extract the speed of the dial-in call. - */ - - (void) sleep(1); - if ((nread = read(0, buf, sizeof(buf) - 1)) > 0) { - buf[nread] = '\0'; - for (bp = buf; bp < buf + nread; bp++) { - if (isascii(*bp) && isdigit(*bp)) { - if ((speed = bcode(bp))) { - tp->c_cflag &= ~CBAUD; - tp->c_cflag |= speed; - } - break; - } - } - } - /* Restore terminal settings. Errors will be dealt with lateron. */ - - tp->c_iflag = iflag; - tp->c_cc[VMIN] = vmin; - (void) ioctl(0, TCSETA, tp); -} - -/* do_prompt - show login prompt, optionally preceded by /etc/issue contents */ -void do_prompt(op, tp) -struct options *op; -struct termio *tp; -{ -#ifdef ISSUE - FILE *fd; - int oflag; - int c; - struct utsname uts; - - (void) uname(&uts); -#endif - - (void) write(1, "\r\n", 2); /* start a new line */ -#ifdef ISSUE /* optional: show /etc/issue */ - if ((op->flags & F_ISSUE) && (fd = fopen(op->issue, "r"))) { - oflag = tp->c_oflag; /* save current setting */ - tp->c_oflag |= (ONLCR | OPOST); /* map NL in output to CR-NL */ - (void) ioctl(0, TCSETAW, tp); - - - while ((c = getc(fd)) != EOF) { - if (c == '\\') { - c = getc(fd); - - switch (c) { - case 's': - (void) printf("%s", uts.sysname); - break; - - case 'n': - (void) printf("%s", uts.nodename); - break; - - case 'r': - (void) printf("%s", uts.release); - break; - - case 'v': - (void) printf("%s", uts.version); - break; - - case 'm': - (void) printf("%s", uts.machine); - break; - - case 'o': - { - char domainname[256]; - - getdomainname(domainname, sizeof(domainname)); - domainname[sizeof(domainname) - 1] = '\0'; - printf("%s", domainname); - } - break; - - case 'd': - case 't': - { - char *weekday[] = { "Sun", "Mon", "Tue", "Wed", "Thu", - "Fri", "Sat" - }; - char *month[] = { "Jan", "Feb", "Mar", "Apr", "May", - "Jun", "Jul", "Aug", "Sep", "Oct", - "Nov", "Dec" - }; - time_t now; - struct tm *tm; - - (void) time(&now); - tm = localtime(&now); - - if (c == 'd') - (void) printf("%s %s %d %d", - weekday[tm->tm_wday], - month[tm->tm_mon], tm->tm_mday, - tm->tm_year < - 70 ? tm->tm_year + - 2000 : tm->tm_year + 1900); - else - (void) printf("%02d:%02d:%02d", tm->tm_hour, - tm->tm_min, tm->tm_sec); - - break; - } - - case 'l': - (void) printf("%s", op->tty); - break; - - case 'b': - { - int i; - - for (i = 0; speedtab[i].speed; i++) { - if (speedtab[i].code == (tp->c_cflag & CBAUD)) { - printf("%ld", speedtab[i].speed); - break; - } - } - break; - } - case 'u': - case 'U': - { - int users = 0; - struct utmp *ut; - - setutent(); - while ((ut = getutent())) - if (ut->ut_type == USER_PROCESS) - users++; - endutent(); - printf("%d ", users); - if (c == 'U') - printf((users == 1) ? "user" : "users"); - break; - } - default: - (void) putchar(c); - } - } else - (void) putchar(c); - } - fflush(stdout); - - tp->c_oflag = oflag; /* restore settings */ - (void) ioctl(0, TCSETAW, tp); /* wait till output is gone */ - (void) fclose(fd); - } -#endif -#ifdef __linux__ - { - char hn[MAXHOSTNAMELEN + 1]; - - (void) gethostname(hn, MAXHOSTNAMELEN); - write(1, hn, strlen(hn)); - } -#endif - (void) write(1, LOGIN, sizeof(LOGIN) - 1); /* always show login prompt */ -} - -/* next_speed - select next baud rate */ -void next_speed(tp, op) -struct termio *tp; -struct options *op; -{ - static int baud_index = FIRST_SPEED; /* current speed index */ - - baud_index = (baud_index + 1) % op->numspeed; - tp->c_cflag &= ~CBAUD; - tp->c_cflag |= op->speeds[baud_index]; - (void) ioctl(0, TCSETA, tp); -} - -/* get_logname - get user name, establish parity, speed, erase, kill, eol */ -/* return NULL on failure, logname on success */ -char *get_logname(op, cp, tp) -struct options *op; -struct chardata *cp; -struct termio *tp; -{ - static char logname[BUFSIZ]; - char *bp; - char c; /* input character, full eight bits */ - char ascval; /* low 7 bits of input character */ - int bits; /* # of "1" bits per character */ - int mask; /* mask with 1 bit up */ - static char *erase[] = { /* backspace-space-backspace */ - "\010\040\010", /* space parity */ - "\010\040\010", /* odd parity */ - "\210\240\210", /* even parity */ - "\210\240\210", /* no parity */ - }; - - /* Initialize kill, erase, parity etc. (also after switching speeds). */ - - *cp = init_chardata; - - /* Flush pending input (esp. after parsing or switching the baud rate). */ - - (void) sleep(1); - (void) ioctl(0, TCFLSH, TCIFLUSH); - - /* Prompt for and read a login name. */ - - for (*logname = 0; *logname == 0; /* void */ ) { - - /* Write issue file and prompt, with "parity" bit == 0. */ - - do_prompt(op, tp); - - /* Read name, watch for break, parity, erase, kill, end-of-line. */ - - for (bp = logname, cp->eol = 0; cp->eol == 0; /* void */ ) { - - /* Do not report trivial EINTR/EIO errors. */ - - if (read(0, &c, 1) < 1) { - if (errno == EINTR || errno == EIO) - exit(0); - error("%s: read: %m", op->tty); - } - /* Do BREAK handling elsewhere. */ - - if ((c == 0) && op->numspeed > 1) - /* return (0); */ - return NULL; - - /* Do parity bit handling. */ - - if (c != (ascval = (c & 0177))) { /* "parity" bit on ? */ - for (bits = 1, mask = 1; mask & 0177; mask <<= 1) - if (mask & ascval) - bits++; /* count "1" bits */ - cp->parity |= ((bits & 1) ? 1 : 2); - } - /* Do erase, kill and end-of-line processing. */ - - switch (ascval) { - case CR: - case NL: - *bp = 0; /* terminate logname */ - cp->eol = ascval; /* set end-of-line char */ - break; - case BS: - case DEL: - case '#': - cp->erase = ascval; /* set erase character */ - if (bp > logname) { - (void) write(1, erase[cp->parity], 3); - bp--; - } - break; - case CTL('U'): - case '@': - cp->kill = ascval; /* set kill character */ - while (bp > logname) { - (void) write(1, erase[cp->parity], 3); - bp--; - } - break; - case CTL('D'): - exit(0); - default: - if (!isascii(ascval) || !isprint(ascval)) { - /* ignore garbage characters */ ; - } else if (bp - logname >= sizeof(logname) - 1) { - error("%s: input overrun", op->tty); - } else { - (void) write(1, &c, 1); /* echo the character */ - *bp++ = ascval; /* and store it */ - } - break; - } - } - } - /* Handle names with upper case and no lower case. */ - - if ((cp->capslock = caps_lock(logname))) { - for (bp = logname; *bp; bp++) - if (isupper(*bp)) - *bp = tolower(*bp); /* map name to lower case */ - } - return (logname); -} - -/* termio_final - set the final tty mode bits */ -void termio_final(op, tp, cp) -struct options *op; -struct termio *tp; -struct chardata *cp; -{ - /* General terminal-independent stuff. */ - - tp->c_iflag |= IXON | IXOFF; /* 2-way flow control */ - tp->c_lflag |= ICANON | ISIG | ECHO | ECHOE | ECHOK | ECHOKE; - /* no longer| ECHOCTL | ECHOPRT */ - tp->c_oflag |= OPOST; - /* tp->c_cflag = 0; */ - tp->c_cc[VINTR] = DEF_INTR; /* default interrupt */ - tp->c_cc[VQUIT] = DEF_QUIT; /* default quit */ - tp->c_cc[VEOF] = DEF_EOF; /* default EOF character */ - tp->c_cc[VEOL] = DEF_EOL; -#ifdef __linux__ - tp->c_cc[VSWTC] = DEF_SWITCH; /* default switch character */ -#else - tp->c_cc[VSWTCH] = DEF_SWITCH; /* default switch character */ -#endif - - /* Account for special characters seen in input. */ - - if (cp->eol == CR) { - tp->c_iflag |= ICRNL; /* map CR in input to NL */ - tp->c_oflag |= ONLCR; /* map NL in output to CR-NL */ - } - tp->c_cc[VERASE] = cp->erase; /* set erase character */ - tp->c_cc[VKILL] = cp->kill; /* set kill character */ - - /* Account for the presence or absence of parity bits in input. */ - - switch (cp->parity) { - case 0: /* space (always 0) parity */ - break; - case 1: /* odd parity */ - tp->c_cflag |= PARODD; - /* FALLTHROUGH */ - case 2: /* even parity */ - tp->c_cflag |= PARENB; - tp->c_iflag |= INPCK | ISTRIP; - /* FALLTHROUGH */ - case (1 | 2): /* no parity bit */ - tp->c_cflag &= ~CSIZE; - tp->c_cflag |= CS7; - break; - } - /* Account for upper case without lower case. */ - - if (cp->capslock) { - tp->c_iflag |= IUCLC; - tp->c_lflag |= XCASE; - tp->c_oflag |= OLCUC; - } - /* Optionally enable hardware flow control */ - -#ifdef CRTSCTS - if (op->flags & F_RTSCTS) - tp->c_cflag |= CRTSCTS; -#endif - - /* Finally, make the new settings effective */ - - if (ioctl(0, TCSETA, tp) < 0) - error("%s: ioctl: TCSETA: %m", op->tty); -} - -/* caps_lock - string contains upper case without lower case */ -/* returns 1 if true, 0 if false */ -int caps_lock(s) -char *s; -{ - int capslock; - - for (capslock = 0; *s; s++) { - if (islower(*s)) - return (0); - if (capslock == 0) - capslock = isupper(*s); - } - return (capslock); -} - -/* bcode - convert speed string to speed code; return 0 on failure */ -int bcode(s) -char *s; -{ - struct Speedtab *sp; - long speed = atol(s); - - for (sp = speedtab; sp->speed; sp++) - if (sp->speed == speed) - return (sp->code); - return (0); -} - -/* error - report errors to console or syslog; only understands %s and %m */ - -#define str2cpy(b,s1,s2) strcat(strcpy(b,s1),s2) - -/* - * output error messages - */ -static void error(const char *fmt, ...) -{ - va_list va_alist; - char buf[256], *bp; - -#ifndef USE_SYSLOG - int fd; -#endif - -#ifdef USE_SYSLOG - buf[0] = '\0'; - bp = buf; -#else - strncpy(buf, progname, 256); - strncat(buf, ": ", 256); - buf[255] = 0; - bp = buf + strlen(buf); -#endif - - va_start(va_alist, fmt); - vsnprintf(bp, 256 - strlen(buf), fmt, va_alist); - buf[255] = 0; - va_end(va_alist); - -#ifdef USE_SYSLOG - openlog(progname, LOG_PID, LOG_AUTH); - syslog(LOG_ERR, buf); - closelog(); -#else - strncat(bp, "\r\n", 256 - strlen(buf)); - buf[255] = 0; - if ((fd = open("/dev/console", 1)) >= 0) { - write(fd, buf, strlen(buf)); - close(fd); - } -#endif - (void) sleep((unsigned) 10); /* be kind to init(8) */ - exit(1); -} |