* 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.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
#include "libbb.h"
#include <syslog.h>
#if ENABLE_FEATURE_UTMP
-#include <utmp.h>
+# include <utmp.h> /* LOGIN_PROCESS */
+#endif
+
+#ifndef IUCLC
+# define IUCLC 0
#endif
/*
*/
#ifdef LOGIN_PROCESS /* defined in System V utmp.h */
#include <sys/utsname.h>
-#include <time.h>
-#if ENABLE_FEATURE_WTMP
-extern void updwtmp(const char *filename, const struct utmp *ut);
-#endif
#else /* if !sysV style, wtmp/utmp code is off */
#undef ENABLE_FEATURE_UTMP
#undef ENABLE_FEATURE_WTMP
debug("entered parse_speeds\n");
while ((cp = strsep(&arg, ",")) != NULL) {
op->speeds[op->numspeed] = bcode(cp);
- if (op->speeds[op->numspeed] <= 0)
+ if (op->speeds[op->numspeed] < 0)
bb_error_msg_and_die("bad speed: %s", cp);
+ /* note: arg "0" turns into speed B0 */
op->numspeed++;
if (op->numspeed > MAX_SPEED)
bb_error_msg_and_die("too many alternate speeds");
ts = argv[0]; /* baud rate(s) */
}
parse_speeds(op, ts);
-
-// TODO: if applet_name is set to "getty: TTY", bb_error_msg's get simpler!
-// grep for "%s:"
+ applet_name = xasprintf("getty: %s", op->tty);
if (argv[2])
xsetenv("TERM", argv[2]);
// cur_dir_fd = xopen(".", O_DIRECTORY | O_NONBLOCK);
// xchdir("/dev");
// xstat(tty, &st);
-// if ((st.st_mode & S_IFMT) != S_IFCHR)
-// bb_error_msg_and_die("%s: not a character device", tty);
+// if (!S_ISCHR(st.st_mode))
+// bb_error_msg_and_die("not a character device");
if (tty[0] != '/')
tty = xasprintf("/dev/%s", tty); /* will leak it */
/* termios_init - initialize termios settings */
static void termios_init(struct termios *tp, int speed, struct options *op)
{
+ speed_t ispeed, ospeed;
/*
* 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;
+ tcflush(0, TCIOFLUSH);
+ ispeed = ospeed = speed;
+ if (speed == B0) {
+ /* Speed was specified as "0" on command line.
+ * Just leave it unchanged */
+ ispeed = cfgetispeed(tp);
+ ospeed = cfgetospeed(tp);
+ }
+ tp->c_cflag = CS8 | HUPCL | CREAD;
if (op->flags & F_LOCAL)
tp->c_cflag |= CLOCAL;
+ cfsetispeed(tp, ispeed);
+ cfsetospeed(tp, ospeed);
- tp->c_iflag = tp->c_lflag = tp->c_line = 0;
+ tp->c_iflag = tp->c_lflag = 0;
tp->c_oflag = OPOST | ONLCR;
tp->c_cc[VMIN] = 1;
tp->c_cc[VTIME] = 0;
+#ifdef __linux__
+ tp->c_line = 0;
+#endif
/* Optionally enable hardware flow control */
#ifdef CRTSCTS
tp->c_cflag |= CRTSCTS;
#endif
- ioctl(0, TCSETS, tp);
+ tcsetattr_stdin_TCSANOW(tp);
debug("term_io 2\n");
}
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);
+ tcsetattr_stdin_TCSANOW(tp);
/*
* Wait for a while, then read everything the modem has said so far and
for (bp = buf; bp < buf + nread; bp++) {
if (isdigit(*bp)) {
speed = bcode(bp);
- if (speed > 0) {
- tp->c_cflag &= ~CBAUD;
- tp->c_cflag |= speed;
- }
+ if (speed > 0)
+ cfsetspeed(tp, 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);
+ tcsetattr_stdin_TCSANOW(tp);
}
/* do_prompt - show login prompt, optionally preceded by /etc/issue contents */
/* Flush pending input (esp. after parsing or switching the baud rate). */
sleep(1);
- ioctl(0, TCFLSH, TCIFLUSH);
+ tcflush(0, TCIOFLUSH);
/* Prompt for and read a login name. */
logname[0] = '\0';
while (cp->eol == '\0') {
/* Do not report trivial EINTR/EIO errors. */
+ errno = EINTR; /* make read of 0 bytes be silent too */
if (read(STDIN_FILENO, &c, 1) < 1) {
if (errno == EINTR || errno == EIO)
exit(EXIT_SUCCESS);
- bb_perror_msg_and_die("%s: read", op->tty);
+ bb_perror_msg_and_die(bb_msg_read_error);
}
/* BREAK. If we have speeds to try,
case CTL('D'):
exit(EXIT_SUCCESS);
default:
- if (!isascii(ascval) || !isprint(ascval)) {
+ if (ascval < ' ') {
/* ignore garbage characters */
} else if ((int)(bp - logname) >= size_logname - 1) {
- bb_error_msg_and_die("%s: input overrun", op->tty);
+ bb_error_msg_and_die("input overrun");
} else {
full_write(STDOUT_FILENO, &c, 1); /* echo the character */
*bp++ = ascval; /* and store it */
tp->c_cc[VQUIT] = DEF_QUIT; /* default quit */
tp->c_cc[VEOF] = DEF_EOF; /* default EOF character */
tp->c_cc[VEOL] = DEF_EOL;
+#ifdef VSWTC
tp->c_cc[VSWTC] = DEF_SWITCH; /* default switch character */
+#endif
/* Account for special characters seen in input. */
if (cp->eol == CR) {
}
#endif
/* Optionally enable hardware flow control */
-#ifdef CRTSCTS
+#ifdef CRTSCTS
if (op->flags & F_RTSCTS)
tp->c_cflag |= CRTSCTS;
#endif
/* Finally, make the new settings effective */
- ioctl_or_perror_and_die(0, TCSETS, tp, "%s: TCSETS", op->tty);
-}
-
-#if ENABLE_FEATURE_UTMP
-static void touch(const char *filename)
-{
- if (access(filename, R_OK | W_OK) == -1)
- close(open(filename, O_WRONLY | O_CREAT, 0664));
-}
-
-/* update_utmp - update our utmp entry */
-static void update_utmp(const char *line, char *fakehost)
-{
- struct utmp ut;
- struct utmp *utp;
- int mypid = getpid();
-
- /* In case we won't find an entry below... */
- memset(&ut, 0, sizeof(ut));
- safe_strncpy(ut.ut_id, line + 3, sizeof(ut.ut_id));
-
- /*
- * 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.
- */
- touch(_PATH_UTMP);
-
- utmpname(_PATH_UTMP);
- setutent();
- while ((utp = getutent()) != NULL) {
- if (utp->ut_type == INIT_PROCESS && utp->ut_pid == mypid) {
- memcpy(&ut, utp, sizeof(ut));
- break;
- }
- }
-
- 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));
- ut.ut_tv.tv_sec = time(NULL);
- ut.ut_type = LOGIN_PROCESS;
- ut.ut_pid = mypid;
-
- pututline(&ut);
- endutent();
-
-#if ENABLE_FEATURE_WTMP
- touch(bb_path_wtmp_file);
- updwtmp(bb_path_wtmp_file, &ut);
-#endif
+ if (tcsetattr_stdin_TCSANOW(tp) < 0)
+ bb_perror_msg_and_die("tcsetattr");
}
-#endif /* CONFIG_FEATURE_UTMP */
int getty_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int getty_main(int argc UNUSED_PARAM, char **argv)
{
int n;
+ pid_t pid;
char *fakehost = NULL; /* Fake hostname for ut_host */
char *logname; /* login name, given to /bin/login */
/* Merging these into "struct local" may _seem_ to reduce
logmode = LOGMODE_BOTH;
#ifdef DEBUGGING
- dbf = xfopen(DEBUGTERM, "w");
+ dbf = xfopen_for_write(DEBUGTERM);
for (n = 1; argv[n]; n++) {
debug(argv[n]);
debug("\n");
* by patching the SunOS kernel variable "zsadtrlow" to a larger value;
* 5 seconds seems to be a good value.
*/
- ioctl_or_perror_and_die(0, TCGETS, &termios, "%s: TCGETS", options.tty);
+ if (tcgetattr(0, &termios) < 0)
+ bb_perror_msg_and_die("tcgetattr");
+ pid = getpid();
#ifdef __linux__
// FIXME: do we need this? Otherwise "-" case seems to be broken...
// /* Forcibly make fd 0 our controlling tty, even if another session
// * has it as a ctty. (Another session loses ctty). */
// ioctl(0, TIOCSCTTY, (void*)1);
/* Make ourself a foreground process group within our session */
- tcsetpgrp(0, getpid());
+ tcsetpgrp(0, pid);
#endif
-#if ENABLE_FEATURE_UTMP
/* Update the utmp file. This tty is ours now! */
- update_utmp(options.tty, fakehost);
-#endif
+ update_utmp(pid, LOGIN_PROCESS, options.tty, "LOGIN", fakehost);
/* Initialize the termios settings (raw mode, eight-bit, blocking i/o). */
debug("calling termios_init\n");
/* Write the modem init string and DON'T flush the buffers */
if (options.flags & F_INITSTRING) {
debug("writing init string\n");
- full_write(STDOUT_FILENO, options.initstring, strlen(options.initstring));
+ full_write1_str(options.initstring);
}
/* Optionally detect the baud rate from the modem status message */
break;
/* we are here only if options.numspeed > 1 */
baud_index = (baud_index + 1) % options.numspeed;
- termios.c_cflag &= ~CBAUD;
- termios.c_cflag |= options.speeds[baud_index];
- ioctl(0, TCSETS, &termios);
+ cfsetispeed(&termios, options.speeds[baud_index]);
+ cfsetospeed(&termios, options.speeds[baud_index]);
+ tcsetattr_stdin_TCSANOW(&termios);
}
}
* and getty is not suid-root applet. */
/* With -n, logname == NULL, and login will ask for username instead */
BB_EXECLP(options.login, options.login, "--", logname, NULL);
- bb_error_msg_and_die("%s: can't exec %s", options.tty, options.login);
+ bb_error_msg_and_die("can't execute '%s'", options.login);
}
projects / oweals / busybox.git / blobdiff