do_tcrestore : 1;
};
-enum {
- CLOCAL_MODE_AUTO = 0,
- CLOCAL_MODE_ALWAYS,
- CLOCAL_MODE_NEVER
-};
-
#define serial_tty_option(opt, flag) \
(((opt)->flags & (F_VCONSOLE|(flag))) == (flag))
static void init_special_char(char* arg, struct agetty_options *op);
static void parse_args(int argc, char **argv, struct agetty_options *op);
static void parse_speeds(struct agetty_options *op, char *arg);
-static void open_tty(const char *tty, struct termios *tp, struct agetty_options *op);
-static void termio_init(struct agetty_options *op, struct termios *tp);
-static void reset_vc(const struct agetty_options *op, struct termios *tp, int canon);
-static void auto_baud(struct termios *tp);
static void output_special_char (struct issue *ie, unsigned char c, struct agetty_options *op,
struct termios *tp, FILE *fp);
static void do_prompt(struct issue *ie, struct agetty_options *op, struct termios *tp);
-static void next_speed(struct agetty_options *op, struct termios *tp);
static char *get_logname(struct issue *ie, struct agetty_options *op,
struct termios *tp, struct chardata *cp);
-static void termio_final(struct agetty_options *op,
- struct termios *tp, struct chardata *cp);
static int caps_lock(char *s);
static void usage(void) __attribute__((__noreturn__));
#ifdef KDGKBLED
# ifndef DEBUG_OUTPUT
# define DEBUG_OUTPUT "/dev/tty10"
# endif
-# define debug(s) do { fprintf(dbf,s); fflush(dbf); } while (0)
FILE *dbf;
-#else
-# define debug(s) do { ; } while (0)
#endif
int main(int argc, char **argv)
debug("calling open_tty\n");
/* Open the tty as standard { input, output, error }. */
- open_tty(options.tty, &termios, &options);
+ agetty_open_tty(options.tty, &termios, &options);
/* Unmask SIGHUP if inherited */
sigemptyset(&set);
/* Initialize the termios settings (raw mode, eight-bit, blocking i/o). */
debug("calling termio_init\n");
- termio_init(&options, &termios);
+ agetty_termio_init(&options, &termios);
/* Write the modem init string and DO NOT flush the buffers. */
if (options.flags & F_INITSTRING &&
/* Optionally detect the baud rate from the modem status message. */
debug("before autobaud\n");
if (serial_tty_option(&options, F_PARSE))
- auto_baud(&termios);
+ agetty_auto_baud(&termios);
/* Set the optional timer. */
if (options.timeout)
while ((username =
get_logname(&issue, &options, &termios, &chardata)) == NULL)
if ((options.flags & F_VCONSOLE) == 0 && options.numspeed)
- next_speed(&options, &termios);
+ agetty_next_speed(&options, &termios);
}
}
/* Finalize the termios settings. */
if ((options.flags & F_VCONSOLE) == 0)
- termio_final(&options, &termios, &chardata);
+ agetty_termio_final(&options, &termios, &chardata);
else
- reset_vc(&options, &termios, 1);
+ agetty_reset_vc(&options, &termios, 1);
/* Now the newline character should be properly written. */
write_all(STDOUT_FILENO, "\r\n", 2);
}
-/* Set up tty as stdin, stdout & stderr. */
-static void open_tty(const char *tty, struct termios *tp, struct agetty_options *op)
-{
- const pid_t pid = getpid();
- int closed = 0;
-#ifndef KDGKBMODE
- int serial;
-#endif
-
- /* Set up new standard input, unless we are given an already opened port. */
-
- if (!op->tty_is_stdin) {
- char buf[PATH_MAX+1];
- struct group *gr = NULL;
- struct stat st;
- int fd, len;
- pid_t tid;
- gid_t gid = 0;
-
- /* Use tty group if available */
- if ((gr = getgrnam("tty")))
- gid = gr->gr_gid;
-
- len = snprintf(buf, sizeof(buf), "/dev/%s", tty);
- if (len < 0 || (size_t)len >= sizeof(buf))
- agetty_log_err(_("/dev/%s: cannot open as standard input: %m"), tty);
-
- /* Open the tty as standard input. */
- if ((fd = open(buf, O_RDWR|O_NOCTTY|O_NONBLOCK, 0)) < 0)
- agetty_log_err(_("/dev/%s: cannot open as standard input: %m"), tty);
-
- /*
- * There is always a race between this reset and the call to
- * vhangup() that s.o. can use to get access to your tty.
- * Linux login(1) will change tty permissions. Use root owner and group
- * with permission -rw------- for the period between getty and login.
- */
- if (fchown(fd, 0, gid) || fchmod(fd, (gid ? 0620 : 0600))) {
- if (errno == EROFS)
- agetty_log_warn("%s: %m", buf);
- else
- agetty_log_err("%s: %m", buf);
- }
-
- /* Sanity checks... */
- if (fstat(fd, &st) < 0)
- agetty_log_err("%s: %m", buf);
- if ((st.st_mode & S_IFMT) != S_IFCHR)
- agetty_log_err(_("/dev/%s: not a character device"), tty);
- if (!isatty(fd))
- agetty_log_err(_("/dev/%s: not a tty"), tty);
-
- if (((tid = tcgetsid(fd)) < 0) || (pid != tid)) {
- if (ioctl(fd, TIOCSCTTY, 1) == -1)
- agetty_log_warn(_("/dev/%s: cannot get controlling tty: %m"), tty);
- }
-
- close(STDIN_FILENO);
- errno = 0;
-
- if (op->flags & F_HANGUP) {
-
- if (ioctl(fd, TIOCNOTTY))
- debug("TIOCNOTTY ioctl failed\n");
-
- /*
- * Let's close all file descriptors before vhangup
- * https://lkml.org/lkml/2012/6/5/145
- */
- close(fd);
- close(STDOUT_FILENO);
- close(STDERR_FILENO);
- errno = 0;
- closed = 1;
-
- if (vhangup())
- agetty_log_err(_("/dev/%s: vhangup() failed: %m"), tty);
- } else
- close(fd);
-
- debug("open(2)\n");
- if (open(buf, O_RDWR|O_NOCTTY|O_NONBLOCK, 0) != 0)
- agetty_log_err(_("/dev/%s: cannot open as standard input: %m"), tty);
-
- if (((tid = tcgetsid(STDIN_FILENO)) < 0) || (pid != tid)) {
- if (ioctl(STDIN_FILENO, TIOCSCTTY, 1) == -1)
- agetty_log_warn(_("/dev/%s: cannot get controlling tty: %m"), tty);
- }
-
- } else {
-
- /*
- * Standard input should already be connected to an open port. Make
- * sure it is open for read/write.
- */
-
- if ((fcntl(STDIN_FILENO, F_GETFL, 0) & O_RDWR) != O_RDWR)
- agetty_log_err(_("%s: not open for read/write"), tty);
-
- }
-
- if (tcsetpgrp(STDIN_FILENO, pid))
- agetty_log_warn(_("/dev/%s: cannot set process group: %m"), tty);
-
- /* Get rid of the present outputs. */
- if (!closed) {
- close(STDOUT_FILENO);
- close(STDERR_FILENO);
- errno = 0;
- }
-
- /* Set up standard output and standard error file descriptors. */
- debug("duping\n");
-
- /* set up stdout and stderr */
- if (dup(STDIN_FILENO) != 1 || dup(STDIN_FILENO) != 2)
- agetty_log_err(_("%s: dup problem: %m"), tty);
-
- /* make stdio unbuffered for slow modem lines */
- setvbuf(stdout, NULL, _IONBF, 0);
-
- /*
- * 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.
- * http://www.sunmanagers.org/archives/1993/0574.html
- */
- memset(tp, 0, sizeof(struct termios));
- if (tcgetattr(STDIN_FILENO, tp) < 0)
- agetty_log_err(_("%s: failed to get terminal attributes: %m"), tty);
-
-#if defined(__FreeBSD_kernel__)
- login_tty (0);
-#endif
-
- /*
- * Detect if this is a virtual console or serial/modem line.
- * In case of a virtual console the ioctl KDGKBMODE succeeds
- * whereas on other lines it will fails.
- */
-#ifdef KDGKBMODE
- if (ioctl(STDIN_FILENO, KDGKBMODE, &op->kbmode) == 0)
-#else
- if (ioctl(STDIN_FILENO, TIOCMGET, &serial) < 0 && (errno == EINVAL))
-#endif
- {
- op->flags |= F_VCONSOLE;
- } else {
-#ifdef K_RAW
- op->kbmode = K_RAW;
-#endif
- }
-
- if (!op->term)
- op->term = get_terminal_default_type(op->tty, !(op->flags & F_VCONSOLE));
- if (!op->term)
- agetty_log_err(_("failed to allocate memory: %m"));
-
- if (setenv("TERM", op->term, 1) != 0)
- agetty_log_err(_("failed to set the %s environment variable"), "TERM");
-}
-
-/* Initialize termios settings. */
-static void termio_clear(int fd)
-{
- /*
- * Do not write a full reset (ESC c) because this destroys
- * the unicode mode again if the terminal was in unicode
- * mode. Also it clears the CONSOLE_MAGIC features which
- * are required for some languages/console-fonts.
- * Just put the cursor to the home position (ESC [ H),
- * erase everything below the cursor (ESC [ J), and set the
- * scrolling region to the full window (ESC [ r)
- */
- write_all(fd, "\033[r\033[H\033[J", 9);
-}
-
-/* Initialize termios settings. */
-static void termio_init(struct agetty_options *op, struct termios *tp)
-{
- speed_t ispeed, ospeed;
- struct winsize ws;
-#ifdef USE_PLYMOUTH_SUPPORT
- struct termios lock;
- int i = (plymouth_command(MAGIC_PING) == 0) ? PLYMOUTH_TERMIOS_FLAGS_DELAY : 0;
- if (i)
- plymouth_command(MAGIC_QUIT);
- while (i-- > 0) {
- /*
- * Even with TTYReset=no it seems with systemd or plymouth
- * the termios flags become changed from under the first
- * agetty on a serial system console as the flags are locked.
- */
- memset(&lock, 0, sizeof(struct termios));
- if (ioctl(STDIN_FILENO, TIOCGLCKTRMIOS, &lock) < 0)
- break;
- if (!lock.c_iflag && !lock.c_oflag && !lock.c_cflag && !lock.c_lflag)
- break;
- debug("termios locked\n");
- sleep(1);
- }
- memset(&lock, 0, sizeof(struct termios));
- ioctl(STDIN_FILENO, TIOCSLCKTRMIOS, &lock);
-#endif
-
- if (op->flags & F_VCONSOLE) {
-#if defined(IUTF8) && defined(KDGKBMODE)
- switch(op->kbmode) {
- case K_UNICODE:
- setlocale(LC_CTYPE, "C.UTF-8");
- op->flags |= F_UTF8;
- break;
- case K_RAW:
- case K_MEDIUMRAW:
- case K_XLATE:
- default:
- setlocale(LC_CTYPE, "POSIX");
- op->flags &= ~F_UTF8;
- break;
- }
-#else
- setlocale(LC_CTYPE, "POSIX");
- op->flags &= ~F_UTF8;
-#endif
- reset_vc(op, tp, 0);
-
- if ((tp->c_cflag & (CS8|PARODD|PARENB)) == CS8)
- op->flags |= F_EIGHTBITS;
-
- if ((op->flags & F_NOCLEAR) == 0)
- termio_clear(STDOUT_FILENO);
- return;
- }
-
- /*
- * Serial line
- */
-
- if (op->flags & F_KEEPSPEED || !op->numspeed) {
- /* Save the original setting. */
- ispeed = cfgetispeed(tp);
- ospeed = cfgetospeed(tp);
-
- /* Save also the original speed to array of the speeds to make
- * it possible to return the original after unexpected BREAKs.
- */
- if (op->numspeed)
- op->speeds[op->numspeed++] = ispeed ? ispeed :
- ospeed ? ospeed :
- TTYDEF_SPEED;
- if (!ispeed)
- ispeed = TTYDEF_SPEED;
- if (!ospeed)
- ospeed = TTYDEF_SPEED;
- } else {
- ospeed = ispeed = op->speeds[FIRST_SPEED];
- }
-
- /*
- * 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.
- */
-
- /* The default is set c_iflag in termio_final() according to chardata.
- * Unfortunately, the chardata are not set according to the serial line
- * if --autolog is enabled. In this case we do not read from the line
- * at all. The best what we can do in this case is to keep c_iflag
- * unmodified for --autolog.
- */
- if (!op->autolog) {
-#ifdef IUTF8
- tp->c_iflag = tp->c_iflag & IUTF8;
- if (tp->c_iflag & IUTF8)
- op->flags |= F_UTF8;
-#else
- tp->c_iflag = 0;
-#endif
- }
-
- tp->c_lflag = 0;
- tp->c_oflag &= OPOST | ONLCR;
-
- if ((op->flags & F_KEEPCFLAGS) == 0)
- tp->c_cflag = CS8 | HUPCL | CREAD | (tp->c_cflag & CLOCAL);
-
- /*
- * Note that the speed is stored in the c_cflag termios field, so we have
- * set the speed always when the cflag is reset.
- */
- cfsetispeed(tp, ispeed);
- cfsetospeed(tp, ospeed);
-
- /* The default is to follow setting from kernel, but it's possible
- * to explicitly remove/add CLOCAL flag by -L[=<mode>]*/
- switch (op->clocal) {
- case CLOCAL_MODE_ALWAYS:
- tp->c_cflag |= CLOCAL; /* -L or -L=always */
- break;
- case CLOCAL_MODE_NEVER:
- tp->c_cflag &= ~CLOCAL; /* -L=never */
- break;
- case CLOCAL_MODE_AUTO: /* -L=auto */
- break;
- }
-
-#ifdef HAVE_STRUCT_TERMIOS_C_LINE
- tp->c_line = 0;
-#endif
- tp->c_cc[VMIN] = 1;
- tp->c_cc[VTIME] = 0;
-
- /* Check for terminal size and if not found set default */
- if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == 0) {
- if (ws.ws_row == 0)
- ws.ws_row = 24;
- if (ws.ws_col == 0)
- ws.ws_col = 80;
- if (ioctl(STDIN_FILENO, TIOCSWINSZ, &ws))
- debug("TIOCSWINSZ ioctl failed\n");
- }
-
- /* Optionally enable hardware flow control. */
-#ifdef CRTSCTS
- if (op->flags & F_RTSCTS)
- tp->c_cflag |= CRTSCTS;
-#endif
- /* Flush input and output queues, important for modems! */
- tcflush(STDIN_FILENO, TCIOFLUSH);
-
- if (tcsetattr(STDIN_FILENO, TCSANOW, tp))
- agetty_log_warn(_("setting terminal attributes failed: %m"));
-
- /* Go to blocking input even in local mode. */
- fcntl(STDIN_FILENO, F_SETFL,
- fcntl(STDIN_FILENO, F_GETFL, 0) & ~O_NONBLOCK);
-
- debug("term_io 2\n");
-}
-
-/* Reset virtual console on stdin to its defaults */
-static void reset_vc(const struct agetty_options *op, struct termios *tp, int canon)
-{
- int fl = 0;
-
- fl |= (op->flags & F_KEEPCFLAGS) == 0 ? 0 : UL_TTY_KEEPCFLAGS;
- fl |= (op->flags & F_UTF8) == 0 ? 0 : UL_TTY_UTF8;
-
- reset_virtual_console(tp, fl);
-
-#ifdef AGETTY_RELOAD
- /*
- * Discard all the flags that makes the line go canonical with echoing.
- * We need to know when the user starts typing.
- */
- if (canon == 0)
- tp->c_lflag = 0;
-#endif
-
- if (tcsetattr(STDIN_FILENO, TCSADRAIN, tp))
- agetty_log_warn(_("setting terminal attributes failed: %m"));
-
- /* Go to blocking input even in local mode. */
- fcntl(STDIN_FILENO, F_SETFL,
- fcntl(STDIN_FILENO, F_GETFL, 0) & ~O_NONBLOCK);
-}
-
-/* Extract baud rate from modem status message. */
-static void auto_baud(struct termios *tp)
-{
- speed_t 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 later on.
- */
- iflag = tp->c_iflag;
- /* Enable 8th-bit stripping. */
- tp->c_iflag |= ISTRIP;
- vmin = tp->c_cc[VMIN];
- /* Do not block when queue is empty. */
- tp->c_cc[VMIN] = 0;
- tcsetattr(STDIN_FILENO, TCSANOW, 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);
- if ((nread = read(STDIN_FILENO, buf, sizeof(buf) - 1)) > 0) {
- buf[nread] = '\0';
- for (bp = buf; bp < buf + nread; bp++)
- if (c_isascii(*bp) && isdigit(*bp)) {
- if ((speed = agetty_bcode(bp))) {
- cfsetispeed(tp, speed);
- cfsetospeed(tp, speed);
- }
- break;
- }
- }
-
- /* Restore terminal settings. Errors will be dealt with later on. */
- tp->c_iflag = iflag;
- tp->c_cc[VMIN] = vmin;
- tcsetattr(STDIN_FILENO, TCSANOW, tp);
-}
-
-
-
static char *read_os_release(struct agetty_options *op, const char *varname)
{
int fd = -1;
if (issue_is_changed(ie)) {
if ((op->flags & F_VCONSOLE)
&& (op->flags & F_NOCLEAR) == 0)
- termio_clear(STDOUT_FILENO);
+ agetty_termio_clear(STDOUT_FILENO);
{
/* TODO: Close to set netlink_groups again using pass 1 */
/* if (ie->nl.fd >= 0) ul_nl_close(&(ie->nl));
}
/* Select next baud rate. */
-static void next_speed(struct agetty_options *op, struct termios *tp)
-{
- static int baud_index = -1;
- if (baud_index == -1)
- /*
- * If the F_KEEPSPEED flags is set then the FIRST_SPEED is not
- * tested yet (see termio_init()).
- */
- baud_index =
- (op->flags & F_KEEPSPEED) ? FIRST_SPEED : 1 % op->numspeed;
- else
- baud_index = (baud_index + 1) % op->numspeed;
-
- cfsetispeed(tp, op->speeds[baud_index]);
- cfsetospeed(tp, op->speeds[baud_index]);
- tcsetattr(STDIN_FILENO, TCSANOW, tp);
-}
-
-/* Erase visual characters for one stored character */
-static void erase_char(int visual_count, struct chardata *cp)
-{
- static const char *const erase[] = { /* backspace-space-backspace */
- "\010\040\010", /* space parity */
- "\010\040\010", /* odd parity */
- "\210\240\210", /* even parity */
- "\210\240\210", /* no parity */
- };
- int i;
- for (i = 0; i < visual_count; i++)
- write_all(1, erase[cp->parity], 3);
-}
/* Get user name, establish parity, speed, erase, kill & eol. */
static char *get_logname(struct issue *ie, struct agetty_options *op, struct termios *tp, struct chardata *cp)
tcflush(STDIN_FILENO, TCIFLUSH);
if ((op->flags & F_VCONSOLE)
&& (op->flags & F_NOCLEAR) == 0)
- termio_clear(STDOUT_FILENO);
+ agetty_termio_clear(STDOUT_FILENO);
bp = logname;
visual_bp = visual_widths;
*bp = '\0';
cp->erase = ascval; /* set erase character */
if (bp > logname) {
if ((tp->c_lflag & ECHO) == 0)
- erase_char(*(visual_bp - 1), cp);
+ agetty_erase_char(*(visual_bp - 1), cp);
bp--;
visual_bp--;
}
break;
while (bp > logname) {
if ((tp->c_lflag & ECHO) == 0)
- erase_char(*(visual_bp - 1), cp);
+ agetty_erase_char(*(visual_bp - 1), cp);
bp--;
visual_bp--;
}
return logname;
}
-/* Set the final tty mode bits. */
-static void termio_final(struct agetty_options *op, struct termios *tp, struct chardata *cp)
-{
- /* General terminal-independent stuff. */
-
- /* 2-way flow control */
- tp->c_iflag |= IXON | IXOFF;
- 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;
- tp->c_cc[VQUIT] = DEF_QUIT;
- tp->c_cc[VEOF] = DEF_EOF;
- tp->c_cc[VEOL] = DEF_EOL;
-#ifdef __linux__
- tp->c_cc[VSWTC] = DEF_SWITCH;
-#elif defined(VSWTCH)
- tp->c_cc[VSWTCH] = DEF_SWITCH;
-#endif /* __linux__ */
-
- /* Account for special characters seen in input. */
- if (cp->eol == CR) {
- tp->c_iflag |= ICRNL;
- tp->c_oflag |= ONLCR;
- }
- tp->c_cc[VERASE] = cp->erase;
- tp->c_cc[VKILL] = cp->kill;
-
- /* 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) {
-#ifdef IUCLC
- tp->c_iflag |= IUCLC;
-#endif
-#ifdef XCASE
- tp->c_lflag |= XCASE;
-#endif
-#ifdef OLCUC
- 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 (tcsetattr(STDIN_FILENO, TCSANOW, tp) < 0)
- agetty_log_err(_("%s: failed to set terminal attributes: %m"), op->tty);
-}
/*
* String contains upper case without lower case.
+#include <ctype.h>
#include <errno.h>
+#include <fcntl.h>
+#include <grp.h>
+#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
#include <termios.h>
+#include <unistd.h>
+#include "all-io.h"
#include "agetty.h"
+#include "c.h"
+#include "cctype.h"
+#include "nls.h"
+#include "ttyutils.h"
+
+#ifdef USE_PLYMOUTH_SUPPORT
+# include "plymouth-ctrl.h"
+#endif
+
+#ifdef __linux__
+# include <sys/kd.h>
+#endif
+
+#if defined(__FreeBSD_kernel__)
+# include <pty.h>
+# ifdef HAVE_UTMP_H
+# include <utmp.h>
+# endif
+# ifdef HAVE_LIBUTIL_H
+# include <libutil.h>
+# endif
+#endif
struct Speedtab {
long speed;
}
}
}
+
+void agetty_termio_clear(int fd)
+{
+ /*
+ * Do not write a full reset (ESC c) because this destroys
+ * the unicode mode again if the terminal was in unicode
+ * mode. Also it clears the CONSOLE_MAGIC features which
+ * are required for some languages/console-fonts.
+ * Just put the cursor to the home position (ESC [ H),
+ * erase everything below the cursor (ESC [ J), and set the
+ * scrolling region to the full window (ESC [ r)
+ */
+ write_all(fd, "\033[r\033[H\033[J", 9);
+}
+
+void agetty_reset_vc(const struct agetty_options *op, struct termios *tp, int canon)
+{
+ int fl = 0;
+
+ fl |= (op->flags & F_KEEPCFLAGS) == 0 ? 0 : UL_TTY_KEEPCFLAGS;
+ fl |= (op->flags & F_UTF8) == 0 ? 0 : UL_TTY_UTF8;
+
+ reset_virtual_console(tp, fl);
+
+#ifdef AGETTY_RELOAD
+ /*
+ * Discard all the flags that makes the line go canonical with echoing.
+ * We need to know when the user starts typing.
+ */
+ if (canon == 0)
+ tp->c_lflag = 0;
+#endif
+
+ if (tcsetattr(STDIN_FILENO, TCSADRAIN, tp))
+ agetty_log_warn(_("setting terminal attributes failed: %m"));
+
+ /* Go to blocking input even in local mode. */
+ fcntl(STDIN_FILENO, F_SETFL,
+ fcntl(STDIN_FILENO, F_GETFL, 0) & ~O_NONBLOCK);
+}
+
+void agetty_open_tty(const char *tty, struct termios *tp, struct agetty_options *op)
+{
+ const pid_t pid = getpid();
+ int closed = 0;
+#ifndef KDGKBMODE
+ int serial;
+#endif
+
+ /* Set up new standard input, unless we are given an already opened port. */
+
+ if (!op->tty_is_stdin) {
+ char buf[PATH_MAX+1];
+ struct group *gr = NULL;
+ struct stat st;
+ int fd, len;
+ pid_t tid;
+ gid_t gid = 0;
+
+ /* Use tty group if available */
+ if ((gr = getgrnam("tty")))
+ gid = gr->gr_gid;
+
+ len = snprintf(buf, sizeof(buf), "/dev/%s", tty);
+ if (len < 0 || (size_t)len >= sizeof(buf))
+ agetty_log_err(_("/dev/%s: cannot open as standard input: %m"), tty);
+
+ /* Open the tty as standard input. */
+ if ((fd = open(buf, O_RDWR|O_NOCTTY|O_NONBLOCK, 0)) < 0)
+ agetty_log_err(_("/dev/%s: cannot open as standard input: %m"), tty);
+
+ /*
+ * There is always a race between this reset and the call to
+ * vhangup() that s.o. can use to get access to your tty.
+ * Linux login(1) will change tty permissions. Use root owner and group
+ * with permission -rw------- for the period between getty and login.
+ */
+ if (fchown(fd, 0, gid) || fchmod(fd, (gid ? 0620 : 0600))) {
+ if (errno == EROFS)
+ agetty_log_warn("%s: %m", buf);
+ else
+ agetty_log_err("%s: %m", buf);
+ }
+
+ /* Sanity checks... */
+ if (fstat(fd, &st) < 0)
+ agetty_log_err("%s: %m", buf);
+ if ((st.st_mode & S_IFMT) != S_IFCHR)
+ agetty_log_err(_("/dev/%s: not a character device"), tty);
+ if (!isatty(fd))
+ agetty_log_err(_("/dev/%s: not a tty"), tty);
+
+ if (((tid = tcgetsid(fd)) < 0) || (pid != tid)) {
+ if (ioctl(fd, TIOCSCTTY, 1) == -1)
+ agetty_log_warn(_("/dev/%s: cannot get controlling tty: %m"), tty);
+ }
+
+ close(STDIN_FILENO);
+ errno = 0;
+
+ if (op->flags & F_HANGUP) {
+
+ if (ioctl(fd, TIOCNOTTY))
+ debug("TIOCNOTTY ioctl failed\n");
+
+ /*
+ * Let's close all file descriptors before vhangup
+ * https://lkml.org/lkml/2012/6/5/145
+ */
+ close(fd);
+ close(STDOUT_FILENO);
+ close(STDERR_FILENO);
+ errno = 0;
+ closed = 1;
+
+ if (vhangup())
+ agetty_log_err(_("/dev/%s: vhangup() failed: %m"), tty);
+ } else
+ close(fd);
+
+ debug("open(2)\n");
+ if (open(buf, O_RDWR|O_NOCTTY|O_NONBLOCK, 0) != 0)
+ agetty_log_err(_("/dev/%s: cannot open as standard input: %m"), tty);
+
+ if (((tid = tcgetsid(STDIN_FILENO)) < 0) || (pid != tid)) {
+ if (ioctl(STDIN_FILENO, TIOCSCTTY, 1) == -1)
+ agetty_log_warn(_("/dev/%s: cannot get controlling tty: %m"), tty);
+ }
+
+ } else {
+
+ /*
+ * Standard input should already be connected to an open port. Make
+ * sure it is open for read/write.
+ */
+
+ if ((fcntl(STDIN_FILENO, F_GETFL, 0) & O_RDWR) != O_RDWR)
+ agetty_log_err(_("%s: not open for read/write"), tty);
+
+ }
+
+ if (tcsetpgrp(STDIN_FILENO, pid))
+ agetty_log_warn(_("/dev/%s: cannot set process group: %m"), tty);
+
+ /* Get rid of the present outputs. */
+ if (!closed) {
+ close(STDOUT_FILENO);
+ close(STDERR_FILENO);
+ errno = 0;
+ }
+
+ /* Set up standard output and standard error file descriptors. */
+ debug("duping\n");
+
+ /* set up stdout and stderr */
+ if (dup(STDIN_FILENO) != 1 || dup(STDIN_FILENO) != 2)
+ agetty_log_err(_("%s: dup problem: %m"), tty);
+
+ /* make stdio unbuffered for slow modem lines */
+ setvbuf(stdout, NULL, _IONBF, 0);
+
+ /*
+ * 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.
+ * http://www.sunmanagers.org/archives/1993/0574.html
+ */
+ memset(tp, 0, sizeof(struct termios));
+ if (tcgetattr(STDIN_FILENO, tp) < 0)
+ agetty_log_err(_("%s: failed to get terminal attributes: %m"), tty);
+
+#if defined(__FreeBSD_kernel__)
+ login_tty (0);
+#endif
+
+ /*
+ * Detect if this is a virtual console or serial/modem line.
+ * In case of a virtual console the ioctl KDGKBMODE succeeds
+ * whereas on other lines it will fails.
+ */
+#ifdef KDGKBMODE
+ if (ioctl(STDIN_FILENO, KDGKBMODE, &op->kbmode) == 0)
+#else
+ if (ioctl(STDIN_FILENO, TIOCMGET, &serial) < 0 && (errno == EINVAL))
+#endif
+ {
+ op->flags |= F_VCONSOLE;
+ } else {
+#ifdef K_RAW
+ op->kbmode = K_RAW;
+#endif
+ }
+
+ if (!op->term)
+ op->term = get_terminal_default_type(op->tty, !(op->flags & F_VCONSOLE));
+ if (!op->term)
+ agetty_log_err(_("failed to allocate memory: %m"));
+
+ if (setenv("TERM", op->term, 1) != 0)
+ agetty_log_err(_("failed to set the %s environment variable"), "TERM");
+}
+
+void agetty_termio_init(struct agetty_options *op, struct termios *tp)
+{
+ speed_t ispeed, ospeed;
+ struct winsize ws;
+#ifdef USE_PLYMOUTH_SUPPORT
+ struct termios lock;
+ int i = (plymouth_command(MAGIC_PING) == 0) ? PLYMOUTH_TERMIOS_FLAGS_DELAY : 0;
+ if (i)
+ plymouth_command(MAGIC_QUIT);
+ while (i-- > 0) {
+ /*
+ * Even with TTYReset=no it seems with systemd or plymouth
+ * the termios flags become changed from under the first
+ * agetty on a serial system console as the flags are locked.
+ */
+ memset(&lock, 0, sizeof(struct termios));
+ if (ioctl(STDIN_FILENO, TIOCGLCKTRMIOS, &lock) < 0)
+ break;
+ if (!lock.c_iflag && !lock.c_oflag && !lock.c_cflag && !lock.c_lflag)
+ break;
+ debug("termios locked\n");
+ sleep(1);
+ }
+ memset(&lock, 0, sizeof(struct termios));
+ ioctl(STDIN_FILENO, TIOCSLCKTRMIOS, &lock);
+#endif
+
+ if (op->flags & F_VCONSOLE) {
+#if defined(IUTF8) && defined(KDGKBMODE)
+ switch(op->kbmode) {
+ case K_UNICODE:
+ setlocale(LC_CTYPE, "C.UTF-8");
+ op->flags |= F_UTF8;
+ break;
+ case K_RAW:
+ case K_MEDIUMRAW:
+ case K_XLATE:
+ default:
+ setlocale(LC_CTYPE, "POSIX");
+ op->flags &= ~F_UTF8;
+ break;
+ }
+#else
+ setlocale(LC_CTYPE, "POSIX");
+ op->flags &= ~F_UTF8;
+#endif
+ agetty_reset_vc(op, tp, 0);
+
+ if ((tp->c_cflag & (CS8|PARODD|PARENB)) == CS8)
+ op->flags |= F_EIGHTBITS;
+
+ if ((op->flags & F_NOCLEAR) == 0)
+ agetty_termio_clear(STDOUT_FILENO);
+ return;
+ }
+
+ /*
+ * Serial line
+ */
+
+ if (op->flags & F_KEEPSPEED || !op->numspeed) {
+ /* Save the original setting. */
+ ispeed = cfgetispeed(tp);
+ ospeed = cfgetospeed(tp);
+
+ /* Save also the original speed to array of the speeds to make
+ * it possible to return the original after unexpected BREAKs.
+ */
+ if (op->numspeed)
+ op->speeds[op->numspeed++] = ispeed ? ispeed :
+ ospeed ? ospeed :
+ TTYDEF_SPEED;
+ if (!ispeed)
+ ispeed = TTYDEF_SPEED;
+ if (!ospeed)
+ ospeed = TTYDEF_SPEED;
+ } else {
+ ospeed = ispeed = op->speeds[FIRST_SPEED];
+ }
+
+ /*
+ * 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.
+ */
+
+ /* The default is set c_iflag in agetty_termio_final() according to
+ * chardata. Unfortunately, the chardata are not set according to the
+ * serial line if --autolog is enabled. In this case we do not read
+ * from the line at all. The best what we can do in this case is to
+ * keep c_iflag unmodified for --autolog.
+ */
+ if (!op->autolog) {
+#ifdef IUTF8
+ tp->c_iflag = tp->c_iflag & IUTF8;
+ if (tp->c_iflag & IUTF8)
+ op->flags |= F_UTF8;
+#else
+ tp->c_iflag = 0;
+#endif
+ }
+
+ tp->c_lflag = 0;
+ tp->c_oflag &= OPOST | ONLCR;
+
+ if ((op->flags & F_KEEPCFLAGS) == 0)
+ tp->c_cflag = CS8 | HUPCL | CREAD | (tp->c_cflag & CLOCAL);
+
+ /*
+ * Note that the speed is stored in the c_cflag termios field, so we have
+ * set the speed always when the cflag is reset.
+ */
+ cfsetispeed(tp, ispeed);
+ cfsetospeed(tp, ospeed);
+
+ /* The default is to follow setting from kernel, but it's possible
+ * to explicitly remove/add CLOCAL flag by -L[=<mode>]*/
+ switch (op->clocal) {
+ case CLOCAL_MODE_ALWAYS:
+ tp->c_cflag |= CLOCAL; /* -L or -L=always */
+ break;
+ case CLOCAL_MODE_NEVER:
+ tp->c_cflag &= ~CLOCAL; /* -L=never */
+ break;
+ case CLOCAL_MODE_AUTO: /* -L=auto */
+ break;
+ }
+
+#ifdef HAVE_STRUCT_TERMIOS_C_LINE
+ tp->c_line = 0;
+#endif
+ tp->c_cc[VMIN] = 1;
+ tp->c_cc[VTIME] = 0;
+
+ /* Check for terminal size and if not found set default */
+ if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == 0) {
+ if (ws.ws_row == 0)
+ ws.ws_row = 24;
+ if (ws.ws_col == 0)
+ ws.ws_col = 80;
+ if (ioctl(STDIN_FILENO, TIOCSWINSZ, &ws))
+ debug("TIOCSWINSZ ioctl failed\n");
+ }
+
+ /* Optionally enable hardware flow control. */
+#ifdef CRTSCTS
+ if (op->flags & F_RTSCTS)
+ tp->c_cflag |= CRTSCTS;
+#endif
+ /* Flush input and output queues, important for modems! */
+ tcflush(STDIN_FILENO, TCIOFLUSH);
+
+ if (tcsetattr(STDIN_FILENO, TCSANOW, tp))
+ agetty_log_warn(_("setting terminal attributes failed: %m"));
+
+ /* Go to blocking input even in local mode. */
+ fcntl(STDIN_FILENO, F_SETFL,
+ fcntl(STDIN_FILENO, F_GETFL, 0) & ~O_NONBLOCK);
+
+ debug("term_io 2\n");
+}
+
+void agetty_termio_final(struct agetty_options *op, struct termios *tp,
+ struct chardata *cp)
+{
+ /* General terminal-independent stuff. */
+
+ /* 2-way flow control */
+ tp->c_iflag |= IXON | IXOFF;
+ 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;
+ tp->c_cc[VQUIT] = DEF_QUIT;
+ tp->c_cc[VEOF] = DEF_EOF;
+ tp->c_cc[VEOL] = DEF_EOL;
+#ifdef __linux__
+ tp->c_cc[VSWTC] = DEF_SWITCH;
+#elif defined(VSWTCH)
+ tp->c_cc[VSWTCH] = DEF_SWITCH;
+#endif /* __linux__ */
+
+ /* Account for special characters seen in input. */
+ if (cp->eol == CR) {
+ tp->c_iflag |= ICRNL;
+ tp->c_oflag |= ONLCR;
+ }
+ tp->c_cc[VERASE] = cp->erase;
+ tp->c_cc[VKILL] = cp->kill;
+
+ /* 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) {
+#ifdef IUCLC
+ tp->c_iflag |= IUCLC;
+#endif
+#ifdef XCASE
+ tp->c_lflag |= XCASE;
+#endif
+#ifdef OLCUC
+ 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 (tcsetattr(STDIN_FILENO, TCSANOW, tp) < 0)
+ agetty_log_err(_("%s: failed to set terminal attributes: %m"), op->tty);
+}
+
+void agetty_auto_baud(struct termios *tp)
+{
+ speed_t 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 later on.
+ */
+ iflag = tp->c_iflag;
+ /* Enable 8th-bit stripping. */
+ tp->c_iflag |= ISTRIP;
+ vmin = tp->c_cc[VMIN];
+ /* Do not block when queue is empty. */
+ tp->c_cc[VMIN] = 0;
+ tcsetattr(STDIN_FILENO, TCSANOW, 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);
+ if ((nread = read(STDIN_FILENO, buf, sizeof(buf) - 1)) > 0) {
+ buf[nread] = '\0';
+ for (bp = buf; bp < buf + nread; bp++)
+ if (c_isascii(*bp) && isdigit(*bp)) {
+ if ((speed = agetty_bcode(bp))) {
+ cfsetispeed(tp, speed);
+ cfsetospeed(tp, speed);
+ }
+ break;
+ }
+ }
+
+ /* Restore terminal settings. Errors will be dealt with later on. */
+ tp->c_iflag = iflag;
+ tp->c_cc[VMIN] = vmin;
+ tcsetattr(STDIN_FILENO, TCSANOW, tp);
+}
+
+void agetty_next_speed(struct agetty_options *op, struct termios *tp)
+{
+ static int baud_index = -1;
+
+ if (baud_index == -1)
+ /*
+ * If the F_KEEPSPEED flags is set then the FIRST_SPEED is not
+ * tested yet (see agetty_termio_init()).
+ */
+ baud_index =
+ (op->flags & F_KEEPSPEED) ? FIRST_SPEED : 1 % op->numspeed;
+ else
+ baud_index = (baud_index + 1) % op->numspeed;
+
+ cfsetispeed(tp, op->speeds[baud_index]);
+ cfsetospeed(tp, op->speeds[baud_index]);
+ tcsetattr(STDIN_FILENO, TCSANOW, tp);
+}
+
+void agetty_erase_char(int visual_count, struct chardata *cp)
+{
+ static const char *const erase[] = { /* backspace-space-backspace */
+ "\010\040\010", /* space parity */
+ "\010\040\010", /* odd parity */
+ "\210\240\210", /* even parity */
+ "\210\240\210", /* no parity */
+ };
+ int i;
+ for (i = 0; i < visual_count; i++)
+ write_all(1, erase[cp->parity], 3);
+}
projects / thirdparty / util-linux.git / commitdiff
