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Diffstat (limited to 'i/pc104/initrd/conf/busybox/loginutils/getty.c')
-rw-r--r--i/pc104/initrd/conf/busybox/loginutils/getty.c856
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diff --git a/i/pc104/initrd/conf/busybox/loginutils/getty.c b/i/pc104/initrd/conf/busybox/loginutils/getty.c
new file mode 100644
index 0000000..64d2d08
--- /dev/null
+++ b/i/pc104/initrd/conf/busybox/loginutils/getty.c
@@ -0,0 +1,856 @@
+/* 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.
+ *
+ * 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
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ *
+ */
+
+#include "busybox.h"
+#include <syslog.h>
+
+#if ENABLE_FEATURE_UTMP
+#include <utmp.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 */
+#include <sys/utsname.h>
+#include <time.h>
+#if ENABLE_FEATURE_WTMP
+extern void updwtmp(const char *filename, const struct utmp *ut);
+static void update_utmp(const char *line);
+#endif
+#endif /* LOGIN_PROCESS */
+
+/*
+ * Things you may want to modify.
+ *
+ * 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.
+ */
+
+/* I doubt there are systems which still need this */
+#undef HANDLE_ALLCAPS
+
+#define _PATH_LOGIN "/bin/login"
+
+/* If ISSUE is not defined, getty 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.
+ */
+#define ISSUE "/etc/issue" /* displayed before the 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 '\n'
+#define DEF_SWITCH 0 /* default switch char */
+
+/*
+ * 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 */
+ unsigned timeout; /* time-out period */
+ const char *login; /* login program */
+ const char *tty; /* name of tty */
+ const char *initstring; /* modem init string */
+ const char *issue; /* alternative issue file */
+ int numspeed; /* number of baud rates to try */
+ int speeds[MAX_SPEED]; /* baud rates to be tried */
+};
+
+static const char opt_string[] = "I:LH:f:hil:mt:wn";
+#define F_INITSTRING (1<<0) /* initstring is set */
+#define F_LOCAL (1<<1) /* force local */
+#define F_FAKEHOST (1<<2) /* force fakehost */
+#define F_CUSTISSUE (1<<3) /* give alternative issue file */
+#define F_RTSCTS (1<<4) /* enable RTS/CTS flow control */
+#define F_ISSUE (1<<5) /* display /etc/issue */
+#define F_LOGIN (1<<6) /* non-default login program */
+#define F_PARSE (1<<7) /* process modem status messages */
+#define F_TIMEOUT (1<<8) /* time out */
+#define F_WAITCRLF (1<<9) /* wait for CR or LF */
+#define F_NOPROMPT (1<<10) /* don't ask for login name! */
+
+/* Storage for things detected while the login name was read. */
+struct chardata {
+ unsigned char erase; /* erase character */
+ unsigned char kill; /* kill character */
+ unsigned char eol; /* end-of-line character */
+ unsigned char parity; /* what parity did we see */
+#ifdef HANDLE_ALLCAPS
+ unsigned char capslock; /* upper case without lower case */
+#endif
+};
+
+/* Initial values for the above. */
+static const struct chardata init_chardata = {
+ DEF_ERASE, /* default erase character */
+ DEF_KILL, /* default kill character */
+ 13, /* default eol char */
+ 0, /* space parity */
+#ifdef HANDLE_ALLCAPS
+ 0, /* no capslock */
+#endif
+};
+
+/* The following is used for understandable diagnostics. */
+
+/* Fake hostname for ut_host specified on command line. */
+static char *fakehost = NULL;
+
+/* ... */
+#ifdef DEBUGGING
+#define debug(s) fprintf(dbf,s); fflush(dbf)
+#define DEBUGTERM "/dev/ttyp0"
+static FILE *dbf;
+#else
+#define debug(s) /* nothing */
+#endif
+
+
+/* bcode - convert speed string to speed code; return 0 on failure */
+static int bcode(const char *s)
+{
+ int r;
+ unsigned value = bb_strtou(s, NULL, 10);
+ if (errno) {
+ return -1;
+ }
+ r = tty_value_to_baud(value);
+ if (r > 0) {
+ return r;
+ }
+ return 0;
+}
+
+
+/* parse_speeds - parse alternate baud rates */
+static void parse_speeds(struct options *op, char *arg)
+{
+ 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)
+ bb_error_msg_and_die("bad speed: %s", cp);
+ if (op->numspeed > MAX_SPEED)
+ bb_error_msg_and_die("too many alternate speeds");
+ }
+ debug("exiting parsespeeds\n");
+}
+
+
+/* parse_args - parse command-line arguments */
+static void parse_args(int argc, char **argv, struct options *op)
+{
+ char *ts;
+
+ op->flags = getopt32(argc, argv, opt_string,
+ &(op->initstring), &fakehost, &(op->issue),
+ &(op->login), &ts);
+ if (op->flags & F_INITSTRING) {
+ const char *p = op->initstring;
+ char *q;
+
+ op->initstring = q = xstrdup(op->initstring);
+ /* copy optarg into op->initstring decoding \ddd
+ octal codes into chars */
+ while (*p) {
+ if (*p == '\\') {
+ p++;
+ *q++ = bb_process_escape_sequence(&p);
+ } else {
+ *q++ = *p++;
+ }
+ }
+ *q = '\0';
+ }
+ op->flags ^= F_ISSUE; /* revert flag show /etc/issue */
+ if (op->flags & F_TIMEOUT) {
+ op->timeout = xatoul_range(ts, 1, INT_MAX);
+ }
+ argv += optind;
+ argc -= optind;
+ debug("after getopt loop\n");
+ if (argc < 2) /* check parameter count */
+ bb_show_usage();
+
+ /* we loosen up a bit and accept both "baudrate tty" and "tty baudrate" */
+ if (isdigit(argv[0][0])) {
+ /* a number first, assume it's a speed (BSD style) */
+ parse_speeds(op, argv[0]); /* baud rate(s) */
+ op->tty = argv[1]; /* tty name */
+ } else {
+ op->tty = argv[0]; /* tty name */
+ parse_speeds(op, argv[1]); /* baud rate(s) */
+ }
+
+ if (argv[2])
+ setenv("TERM", argv[2], 1);
+
+ debug("exiting parseargs\n");
+}
+
+static void xdup2(int srcfd, int dstfd, const char *tty)
+{
+ if (dup2(srcfd, dstfd) == -1)
+ bb_perror_msg_and_die("%s: dup", tty);
+}
+
+/* open_tty - set up tty as standard { input, output, error } */
+static void open_tty(const char *tty, struct termios *tp, int local)
+{
+ int chdir_to_root = 0;
+
+ /* Set up new standard input, unless we are given an already opened port. */
+
+ if (NOT_LONE_DASH(tty)) {
+ struct stat st;
+ int fd;
+
+ /* Sanity checks... */
+
+ xchdir("/dev");
+ chdir_to_root = 1;
+ xstat(tty, &st);
+ if ((st.st_mode & S_IFMT) != S_IFCHR)
+ bb_error_msg_and_die("%s: not a character device", tty);
+
+ /* Open the tty as standard input. */
+
+ debug("open(2)\n");
+ fd = xopen(tty, O_RDWR | O_NONBLOCK);
+ xdup2(fd, 0, tty);
+ while (fd > 2) close(fd--);
+ } 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)
+ bb_error_msg_and_die("stdin is not open for read/write");
+ }
+
+ /* Replace current standard output/error fd's with new ones */
+ debug("duping\n");
+ xdup2(0, 1, tty);
+ xdup2(0, 2, tty);
+
+ /*
+ * 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, TCGETS, tp) < 0)
+ bb_perror_msg_and_die("%s: ioctl(TCGETS)", 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
+#warning Debian /dev/vcs[a]NN hack is deprecated and will be removed
+ {
+ /* tty to root.dialout 660 */
+ struct group *gr;
+ int id;
+
+ gr = getgrnam("dialout");
+ id = gr ? 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;
+
+ vcs = xstrdup(tty);
+ vcsa = xmalloc(strlen(tty) + 2);
+ strcpy(vcs, "vcs");
+ strcpy(vcs + 3, tty + 3);
+ strcpy(vcsa, "vcsa");
+ strcpy(vcsa + 4, tty + 3);
+
+ gr = getgrnam("sys");
+ id = gr ? gr->gr_gid : 0;
+ chown(vcs, 0, id);
+ chmod(vcs, 0600);
+ chown(vcsa, 0, id);
+ chmod(vcs, 0600);
+
+ free(vcs);
+ free(vcsa);
+ }
+ }
+#else
+ if (NOT_LONE_DASH(tty)) {
+ chown(tty, 0, 0); /* 0:0 */
+ chmod(tty, 0622); /* crw--w--w- */
+ }
+#endif
+ if (chdir_to_root)
+ xchdir("/");
+}
+
+/* termios_init - initialize termios settings */
+static void termios_init(struct termios *tp, int speed, struct options *op)
+{
+ /*
+ * Initial termios 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
+ * later on.
+ */
+#ifdef __linux__
+ /* flush input and output queues, important for modems! */
+ 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_line = 0;
+ tp->c_oflag = OPOST | ONLCR;
+ 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
+
+ ioctl(0, TCSETS, 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 */
+static void auto_baud(char *buf, unsigned size_buf, struct termios *tp)
+{
+ int speed;
+ int vmin;
+ unsigned iflag;
+ 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 later on.
+ */
+
+ 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 */
+ ioctl(0, TCSETS, 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.
+ */
+
+ sleep(1);
+ nread = read(0, buf, size_buf - 1);
+ if (nread > 0) {
+ buf[nread] = '\0';
+ for (bp = buf; bp < buf + nread; bp++) {
+ if (isascii(*bp) && isdigit(*bp)) {
+ speed = bcode(bp);
+ if (speed) {
+ tp->c_cflag &= ~CBAUD;
+ tp->c_cflag |= speed;
+ }
+ break;
+ }
+ }
+ }
+ /* Restore terminal settings. Errors will be dealt with later on. */
+
+ tp->c_iflag = iflag;
+ tp->c_cc[VMIN] = vmin;
+ ioctl(0, TCSETS, tp);
+}
+
+/* next_speed - select next baud rate */
+static void next_speed(struct termios *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];
+ ioctl(0, TCSETS, tp);
+}
+
+
+/* do_prompt - show login prompt, optionally preceded by /etc/issue contents */
+static void do_prompt(struct options *op, struct termios *tp)
+{
+#ifdef ISSUE
+ print_login_issue(op->issue, op->tty);
+#endif
+ print_login_prompt();
+}
+
+#ifdef HANDLE_ALLCAPS
+/* caps_lock - string contains upper case without lower case */
+/* returns 1 if true, 0 if false */
+static int caps_lock(const char *s)
+{
+ while (*s)
+ if (islower(*s++))
+ return 0;
+ return 1;
+}
+#endif
+
+/* get_logname - get user name, establish parity, speed, erase, kill, eol */
+/* return NULL on failure, logname on success */
+static char *get_logname(char *logname, unsigned size_logname,
+ struct options *op, struct chardata *cp, struct termios *tp)
+{
+ 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 const char erase[][3] = { /* 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). */
+
+ sleep(1);
+ ioctl(0, TCFLSH, TCIFLUSH);
+
+ /* Prompt for and read a login name. */
+
+ logname[0] = '\0';
+ while (!logname[0]) {
+
+ /* Write issue file and prompt, with "parity" bit == 0. */
+
+ do_prompt(op, tp);
+
+ /* Read name, watch for break, parity, erase, kill, end-of-line. */
+
+ bp = logname;
+ cp->eol = '\0';
+ while (cp->eol == '\0') {
+
+ /* Do not report trivial EINTR/EIO errors. */
+ if (read(0, &c, 1) < 1) {
+ if (errno == EINTR || errno == EIO)
+ exit(0);
+ bb_perror_msg_and_die("%s: read", op->tty);
+ }
+
+ /* Do BREAK handling elsewhere. */
+ if (c == '\0' && op->numspeed > 1)
+ return NULL;
+
+ /* Do parity bit handling. */
+ ascval = c & 0177;
+ if (c != ascval) { /* "parity" bit on ? */
+ bits = 1;
+ mask = 1;
+ while (mask & 0177) {
+ if (mask & ascval)
+ bits++; /* count "1" bits */
+ mask <<= 1;
+ }
+ /* ... |= 2 - even, 1 - odd */
+ cp->parity |= 2 - (bits & 1);
+ }
+
+ /* 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) {
+ write(1, erase[cp->parity], 3);
+ bp--;
+ }
+ break;
+ case CTL('U'):
+ case '@':
+ cp->kill = ascval; /* set kill character */
+ while (bp > logname) {
+ 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 >= size_logname - 1) {
+ bb_error_msg_and_die("%s: input overrun", op->tty);
+ } else {
+ write(1, &c, 1); /* echo the character */
+ *bp++ = ascval; /* and store it */
+ }
+ break;
+ }
+ }
+ }
+ /* Handle names with upper case and no lower case. */
+
+#ifdef HANDLE_ALLCAPS
+ cp->capslock = caps_lock(logname);
+ if (cp->capslock) {
+ for (bp = logname; *bp; bp++)
+ if (isupper(*bp))
+ *bp = tolower(*bp); /* map name to lower case */
+ }
+#endif
+ return logname;
+}
+
+/* termios_final - set the final tty mode bits */
+static void termios_final(struct options *op, struct termios *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;
+ tp->c_cc[VSWTC] = DEF_SWITCH; /* default switch character */
+
+ /* 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. */
+#ifdef HANDLE_ALLCAPS
+ if (cp->capslock) {
+ tp->c_iflag |= IUCLC;
+ tp->c_lflag |= XCASE;
+ tp->c_oflag |= OLCUC;
+ }
+#endif
+ /* 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, TCSETS, tp) < 0)
+ bb_perror_msg_and_die("%s: ioctl(TCSETS)", op->tty);
+}
+
+
+#ifdef SYSV_STYLE
+#if ENABLE_FEATURE_UTMP
+/* update_utmp - update our utmp entry */
+static void update_utmp(const char *line)
+{
+ struct utmp ut;
+ struct utmp *utp;
+ time_t t;
+ int mypid = getpid();
+
+ /*
+ * 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.
+ */
+ if (access(_PATH_UTMP, R_OK|W_OK) == -1) {
+ close(creat(_PATH_UTMP, 0664));
+ }
+ 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));
+ safe_strncpy(ut.ut_id, line + 3, sizeof(ut.ut_id));
+ }
+ /* endutent(); */
+
+ strcpy(ut.ut_user, "LOGIN");
+ safe_strncpy(ut.ut_line, line, sizeof(ut.ut_line));
+ if (fakehost)
+ safe_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();
+
+#if ENABLE_FEATURE_WTMP
+ if (access(bb_path_wtmp_file, R_OK|W_OK) == -1)
+ close(creat(bb_path_wtmp_file, 0664));
+ updwtmp(bb_path_wtmp_file, &ut);
+#endif
+}
+
+#endif /* CONFIG_FEATURE_UTMP */
+#endif /* SYSV_STYLE */
+
+
+int getty_main(int argc, char **argv);
+int getty_main(int argc, char **argv)
+{
+ int nullfd;
+ char *logname = NULL; /* login name, given to /bin/login */
+ /* Merging these into "struct local" may _seem_ to reduce
+ * parameter passing, but today's gcc will inline
+ * statics which are called once anyway, so don't do that */
+ struct chardata chardata; /* set by get_logname() */
+ struct termios termios; /* terminal mode bits */
+ struct options options = {
+ 0, /* show /etc/issue (SYSV_STYLE) */
+ 0, /* no timeout */
+ _PATH_LOGIN, /* default login program */
+ "tty1", /* default tty line */
+ "", /* modem init string */
+#ifdef ISSUE
+ ISSUE, /* default issue file */
+#else
+ NULL,
+#endif
+ 0, /* no baud rates known yet */
+ };
+
+ /* Already too late because of theoretical
+ * possibility of getty --help somehow triggered
+ * inadvertently before we reach this. Oh well. */
+ logmode = LOGMODE_NONE;
+ setsid();
+ nullfd = xopen(bb_dev_null, O_RDWR);
+ /* dup2(nullfd, 0); - no, because of possible "getty - 9600" */
+ /* open_tty() will take care of fd# 0 anyway */
+ dup2(nullfd, 1);
+ dup2(nullfd, 2);
+ while (nullfd > 2) close(nullfd--);
+ /* We want special flavor of error_msg_and_die */
+ die_sleep = 10;
+ msg_eol = "\r\n";
+ openlog(applet_name, LOG_PID, LOG_AUTH);
+ logmode = LOGMODE_BOTH;
+
+#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 SYSV_STYLE
+#if ENABLE_FEATURE_UTMP
+ /* Update the utmp file. */
+ update_utmp(options.tty);
+#endif
+#endif
+
+ debug("calling open_tty\n");
+ /* Open the tty as standard { input, output, error }. */
+ open_tty(options.tty, &termios, options.flags & F_LOCAL);
+
+#ifdef __linux__
+ {
+ int iv;
+
+ iv = getpid();
+ ioctl(0, TIOCSPGRP, &iv);
+ }
+#endif
+ /* Initialize the termios settings (raw mode, eight-bit, blocking i/o). */
+ debug("calling termios_init\n");
+ termios_init(&termios, 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(bb_common_bufsiz1, sizeof(bb_common_bufsiz1), &termios);
+
+ /* Set the optional timer. */
+ if (options.timeout)
+ alarm(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");
+ logname = get_logname(bb_common_bufsiz1, sizeof(bb_common_bufsiz1),
+ &options, &chardata, &termios);
+ while (logname == NULL)
+ next_speed(&termios, &options);
+ }
+
+ /* Disable timer. */
+
+ if (options.timeout)
+ alarm(0);
+
+ /* Finalize the termios settings. */
+
+ termios_final(&options, &termios, &chardata);
+
+ /* Now the newline character should be properly written. */
+
+ write(1, "\n", 1);
+
+ /* Let the login program take care of password validation. */
+
+ execl(options.login, options.login, "--", logname, (char *) 0);
+ bb_error_msg_and_die("%s: can't exec %s", options.tty, options.login);
+}