1 /* vi: set sw=4 ts=4: */
2 /* agetty.c - another getty program for Linux. By W. Z. Venema 1989
3 Ported to Linux by Peter Orbaek <poe@daimi.aau.dk>
4 This program is freely distributable. The entire man-page used to
5 be here. Now read the real man-page agetty.8 instead.
7 -f option added by Eric Rasmussen <ear@usfirst.org> - 12/28/95
9 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@misiek.eu.org>
10 - added Native Language Support
12 1999-05-05 Thorsten Kranzkowski <dl8bcu@gmx.net>
13 - enable hardware flow control before displaying /etc/issue
21 #include <sys/ioctl.h>
24 #include <sys/signal.h>
33 #define _PATH_LOGIN "/bin/login"
35 /* If USE_SYSLOG is undefined all diagnostics go directly to /dev/console. */
37 #include <sys/param.h>
44 * Some heuristics to find out what environment we are in: if it is not
45 * System V, assume it is SunOS 4.
48 #ifdef LOGIN_PROCESS /* defined in System V utmp.h */
49 #define SYSV_STYLE /* select System V style getty */
50 #ifdef CONFIG_FEATURE_U_W_TMP
51 extern void updwtmp(const char *filename, const struct utmp *ut);
53 #endif /* LOGIN_PROCESS */
56 * Things you may want to modify.
58 * If ISSUE is not defined, agetty will never display the contents of the
59 * /etc/issue file. You will not want to spit out large "issue" files at the
60 * wrong baud rate. Relevant for System V only.
62 * You may disagree with the default line-editing etc. characters defined
63 * below. Note, however, that DEL cannot be used for interrupt generation
64 * and for line editing at the same time.
68 #define ISSUE "/etc/issue" /* displayed before the login prompt */
69 #include <sys/utsname.h>
73 /* Some shorthands for control characters. */
75 #define CTL(x) (x ^ 0100) /* Assumes ASCII dialect */
76 #define CR CTL('M') /* carriage return */
77 #define NL CTL('J') /* line feed */
78 #define BS CTL('H') /* back space */
79 #define DEL CTL('?') /* delete */
81 /* Defaults for line-editing etc. characters; you may want to change this. */
83 #define DEF_ERASE DEL /* default erase character */
84 #define DEF_INTR CTL('C') /* default interrupt character */
85 #define DEF_QUIT CTL('\\') /* default quit char */
86 #define DEF_KILL CTL('U') /* default kill char */
87 #define DEF_EOF CTL('D') /* default EOF char */
89 #define DEF_SWITCH 0 /* default switch char */
92 * SunOS 4.1.1 termio is broken. We must use the termios stuff instead,
93 * because the termio -> termios translation does not clear the termios
94 * CIBAUD bits. Therefore, the tty driver would sometimes report that input
95 * baud rate != output baud rate. I did not notice that problem with SunOS
96 * 4.1. We will use termios where available, and termio otherwise.
99 /* linux 0.12 termio is broken too, if we use it c_cc[VERASE] isn't set
100 properly, but all is well if we use termios?! */
106 #define termio termios
107 #define TCGETA TCGETS
108 #define TCSETA TCSETS
109 #define TCSETAW TCSETSW
113 * This program tries to not use the standard-i/o library. This keeps the
114 * executable small on systems that do not have shared libraries (System V
122 * When multiple baud rates are specified on the command line, the first one
123 * we will try is the first one specified.
126 #define FIRST_SPEED 0
128 /* Storage for command-line options. */
130 #define MAX_SPEED 10 /* max. nr. of baud rates */
133 int flags; /* toggle switches, see below */
134 int timeout; /* time-out period */
135 char *login; /* login program */
136 char *tty; /* name of tty */
137 char *initstring; /* modem init string */
138 char *issue; /* alternative issue file */
139 int numspeed; /* number of baud rates to try */
140 int speeds[MAX_SPEED]; /* baud rates to be tried */
143 #define F_PARSE (1<<0) /* process modem status messages */
144 #define F_ISSUE (1<<1) /* display /etc/issue */
145 #define F_RTSCTS (1<<2) /* enable RTS/CTS flow control */
146 #define F_LOCAL (1<<3) /* force local */
147 #define F_INITSTRING (1<<4) /* initstring is set */
148 #define F_WAITCRLF (1<<5) /* wait for CR or LF */
149 #define F_CUSTISSUE (1<<6) /* give alternative issue file */
150 #define F_NOPROMPT (1<<7) /* don't ask for login name! */
152 /* Storage for things detected while the login name was read. */
155 int erase; /* erase character */
156 int kill; /* kill character */
157 int eol; /* end-of-line character */
158 int parity; /* what parity did we see */
159 int capslock; /* upper case without lower case */
162 /* Initial values for the above. */
164 struct chardata init_chardata = {
165 DEF_ERASE, /* default erase character */
166 DEF_KILL, /* default kill character */
167 13, /* default eol char */
168 0, /* space parity */
178 static struct Speedtab speedtab[] = {
217 static void parse_args(int argc, char **argv, struct options *op);
218 static void parse_speeds(struct options *op, char *arg);
219 static void open_tty(char *tty, struct termio *tp, int local);
220 static void termio_init(struct termio *tp, int speed, struct options *op);
221 static void auto_baud(struct termio *tp);
222 static void do_prompt(struct options *op, struct termio *tp);
223 static void next_speed(struct termio *tp, struct options *op);
224 static char *get_logname(struct options *op, struct chardata *cp,
227 static void termio_final(struct options *op, struct termio *tp,
229 struct chardata *cp);
230 static int caps_lock(const char *s);
231 static int bcode(char *s);
232 static void error(const char *fmt, ...) __attribute__ ((noreturn));
234 #ifdef CONFIG_FEATURE_U_W_TMP
235 static void update_utmp(char *line);
238 /* The following is used for understandable diagnostics. */
240 /* Fake hostname for ut_host specified on command line. */
241 static char *fakehost = NULL;
245 #define debug(s) fprintf(dbf,s); fflush(dbf)
246 #define DEBUGTERM "/dev/ttyp0"
249 #define debug(s) /* nothing */
252 int getty_main(int argc, char **argv)
254 char *logname = NULL; /* login name, given to /bin/login */
255 struct chardata chardata; /* set by get_logname() */
256 struct termio termio; /* terminal mode bits */
257 static struct options options = {
258 F_ISSUE, /* show /etc/issue (SYSV_STYLE) */
260 _PATH_LOGIN, /* default login program */
261 "tty1", /* default tty line */
262 "", /* modem init string */
263 ISSUE, /* default issue file */
264 0, /* no baud rates known yet */
268 dbf = bb_xfopen(DEBUGTERM, "w");
273 for (i = 1; i < argc; i++) {
280 /* Parse command-line arguments. */
282 parse_args(argc, argv, &options);
288 /* Update the utmp file. */
292 #ifdef CONFIG_FEATURE_U_W_TMP
293 update_utmp(options.tty);
297 debug("calling open_tty\n");
298 /* Open the tty as standard { input, output, error }. */
299 open_tty(options.tty, &termio, options.flags & F_LOCAL);
306 ioctl(0, TIOCSPGRP, &iv);
309 /* Initialize the termio settings (raw mode, eight-bit, blocking i/o). */
310 debug("calling termio_init\n");
311 termio_init(&termio, options.speeds[FIRST_SPEED], &options);
313 /* write the modem init string and DON'T flush the buffers */
314 if (options.flags & F_INITSTRING) {
315 debug("writing init string\n");
316 write(1, options.initstring, strlen(options.initstring));
319 if (!(options.flags & F_LOCAL)) {
320 /* go to blocking write mode unless -L is specified */
321 fcntl(1, F_SETFL, fcntl(1, F_GETFL, 0) & ~O_NONBLOCK);
324 /* Optionally detect the baud rate from the modem status message. */
325 debug("before autobaud\n");
326 if (options.flags & F_PARSE)
329 /* Set the optional timer. */
331 (void) alarm((unsigned) options.timeout);
333 /* optionally wait for CR or LF before writing /etc/issue */
334 if (options.flags & F_WAITCRLF) {
337 debug("waiting for cr-lf\n");
338 while (read(0, &ch, 1) == 1) {
339 ch &= 0x7f; /* strip "parity bit" */
341 fprintf(dbf, "read %c\n", ch);
343 if (ch == '\n' || ch == '\r')
348 chardata = init_chardata;
349 if (!(options.flags & F_NOPROMPT)) {
350 /* Read the login name. */
351 debug("reading login name\n");
352 /* while ((logname = get_logname(&options, &chardata, &termio)) == 0) */
353 while ((logname = get_logname(&options, &chardata, &termio)) ==
354 NULL) next_speed(&termio, &options);
362 /* Finalize the termio settings. */
364 termio_final(&options, &termio, &chardata);
366 /* Now the newline character should be properly written. */
368 (void) write(1, "\n", 1);
370 /* Let the login program take care of password validation. */
372 (void) execl(options.login, options.login, "--", logname, (char *) 0);
373 error("%s: can't exec %s: %m", options.tty, options.login);
376 /* parse-args - parse command-line arguments */
378 static void parse_args(int argc, char **argv, struct options *op)
380 extern char *optarg; /* getopt */
381 extern int optind; /* getopt */
384 while (isascii(c = getopt(argc, argv, "I:LH:f:hil:mt:wn"))) {
387 if (!(op->initstring = strdup(optarg)))
388 error(bb_msg_memory_exhausted);
394 /* copy optarg into op->initstring decoding \ddd
395 octal codes into chars */
401 *q++ = bb_process_escape_sequence(&p);
408 op->flags |= F_INITSTRING;
411 case 'L': /* force local */
412 op->flags |= F_LOCAL;
414 case 'H': /* fake login host */
417 case 'f': /* custom issue file */
418 op->flags |= F_CUSTISSUE;
421 case 'h': /* enable h/w flow control */
422 op->flags |= F_RTSCTS;
424 case 'i': /* do not show /etc/issue */
425 op->flags &= ~F_ISSUE;
428 op->login = optarg; /* non-default login program */
430 case 'm': /* parse modem status message */
431 op->flags |= F_PARSE;
434 op->flags |= F_NOPROMPT;
436 case 't': /* time out */
437 if ((op->timeout = atoi(optarg)) <= 0)
438 error("bad timeout value: %s", optarg);
441 op->flags |= F_WAITCRLF;
447 debug("after getopt loop\n");
448 if (argc < optind + 2) /* check parameter count */
451 /* we loosen up a bit and accept both "baudrate tty" and "tty baudrate" */
452 if ('0' <= argv[optind][0] && argv[optind][0] <= '9') {
453 /* a number first, assume it's a speed (BSD style) */
454 parse_speeds(op, argv[optind++]); /* baud rate(s) */
455 op->tty = argv[optind]; /* tty name */
457 op->tty = argv[optind++]; /* tty name */
458 parse_speeds(op, argv[optind]); /* baud rate(s) */
462 if (argc > optind && argv[optind])
463 setenv("TERM", argv[optind], 1);
465 debug("exiting parseargs\n");
468 /* parse_speeds - parse alternate baud rates */
470 static void parse_speeds(struct options *op, char *arg)
474 debug("entered parse_speeds\n");
475 for (cp = strtok(arg, ","); cp != 0; cp = strtok((char *) 0, ",")) {
476 if ((op->speeds[op->numspeed++] = bcode(cp)) <= 0)
477 error("bad speed: %s", cp);
478 if (op->numspeed > MAX_SPEED)
479 error("too many alternate speeds");
481 debug("exiting parsespeeds\n");
485 #ifdef CONFIG_FEATURE_U_W_TMP
487 /* update_utmp - update our utmp entry */
488 static void update_utmp(char *line)
493 int mypid = getpid();
494 #if ! (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 1))
499 * The utmp file holds miscellaneous information about things started by
500 * /sbin/init and other system-related events. Our purpose is to update
501 * the utmp entry for the current process, in particular the process type
502 * and the tty line we are listening to. Return successfully only if the
503 * utmp file can be opened for update, and if we are able to find our
504 * entry in the utmp file.
506 if (access(_PATH_UTMP, R_OK|W_OK) == -1) {
507 close(creat(_PATH_UTMP, 0664));
509 utmpname(_PATH_UTMP);
511 while ((utp = getutent())
512 && !(utp->ut_type == INIT_PROCESS && utp->ut_pid == mypid)) /* nothing */
516 memcpy(&ut, utp, sizeof(ut));
518 /* some inits don't initialize utmp... */
519 memset(&ut, 0, sizeof(ut));
520 strncpy(ut.ut_id, line + 3, sizeof(ut.ut_id));
524 strncpy(ut.ut_user, "LOGIN", sizeof(ut.ut_user));
525 strncpy(ut.ut_line, line, sizeof(ut.ut_line));
527 strncpy(ut.ut_host, fakehost, sizeof(ut.ut_host));
530 ut.ut_type = LOGIN_PROCESS;
537 if (access(_PATH_WTMP, R_OK|W_OK) == -1) {
538 close(creat(_PATH_WTMP, 0664));
540 updwtmp(_PATH_WTMP, &ut);
544 #endif /* CONFIG_FEATURE_U_W_TMP */
545 #endif /* SYSV_STYLE */
547 /* open_tty - set up tty as standard { input, output, error } */
548 static void open_tty(char *tty, struct termio *tp, int local)
550 /* Get rid of the present standard { output, error} if any. */
554 errno = 0; /* ignore above errors */
556 /* Set up new standard input, unless we are given an already opened port. */
558 if (strcmp(tty, "-")) {
561 /* Sanity checks... */
564 error("/dev: chdir() failed: %m");
565 if (stat(tty, &st) < 0)
566 error("/dev/%s: %m", tty);
567 if ((st.st_mode & S_IFMT) != S_IFCHR)
568 error("/dev/%s: not a character device", tty);
570 /* Open the tty as standard input. */
573 errno = 0; /* ignore close(2) errors */
576 if (open(tty, O_RDWR | O_NONBLOCK, 0) != 0)
577 error("/dev/%s: cannot open as standard input: %m", tty);
582 * Standard input should already be connected to an open port. Make
583 * sure it is open for read/write.
586 if ((fcntl(0, F_GETFL, 0) & O_RDWR) != O_RDWR)
587 error("%s: not open for read/write", tty);
590 /* Set up standard output and standard error file descriptors. */
592 if (dup(0) != 1 || dup(0) != 2) /* set up stdout and stderr */
593 error("%s: dup problem: %m", tty); /* we have a problem */
596 * The following ioctl will fail if stdin is not a tty, but also when
597 * there is noise on the modem control lines. In the latter case, the
598 * common course of action is (1) fix your cables (2) give the modem more
599 * time to properly reset after hanging up. SunOS users can achieve (2)
600 * by patching the SunOS kernel variable "zsadtrlow" to a larger value;
601 * 5 seconds seems to be a good value.
604 if (ioctl(0, TCGETA, tp) < 0)
605 error("%s: ioctl: %m", tty);
608 * It seems to be a terminal. Set proper protections and ownership. Mode
609 * 0622 is suitable for SYSV <4 because /bin/login does not change
610 * protections. SunOS 4 login will change the protections to 0620 (write
611 * access for group tty) after the login has succeeded.
616 /* tty to root.dialout 660 */
620 id = (gr = getgrnam("dialout")) ? gr->gr_gid : 0;
624 /* vcs,vcsa to root.sys 600 */
625 if (!strncmp(tty, "tty", 3) && isdigit(tty[3])) {
628 if (!(vcs = strdup(tty)))
629 error("Can't malloc for vcs");
630 if (!(vcsa = malloc(strlen(tty) + 2)))
631 error("Can't malloc for vcsa");
633 strcpy(vcs + 3, tty + 3);
634 strcpy(vcsa, "vcsa");
635 strcpy(vcsa + 4, tty + 3);
637 id = (gr = getgrnam("sys")) ? gr->gr_gid : 0;
648 (void) chown(tty, 0, 0); /* root, sys */
649 (void) chmod(tty, 0622); /* crw--w--w- */
650 errno = 0; /* ignore above errors */
654 /* termio_init - initialize termio settings */
656 static void termio_init(struct termio *tp, int speed, struct options *op)
660 * Initial termio settings: 8-bit characters, raw-mode, blocking i/o.
661 * Special characters are set after we have read the login name; all
662 * reads will be done in raw mode anyway. Errors will be dealt with
666 /* flush input and output queues, important for modems! */
667 (void) ioctl(0, TCFLSH, TCIOFLUSH);
670 tp->c_cflag = CS8 | HUPCL | CREAD | speed;
671 if (op->flags & F_LOCAL) {
672 tp->c_cflag |= CLOCAL;
675 tp->c_iflag = tp->c_lflag = tp->c_oflag = tp->c_line = 0;
679 /* Optionally enable hardware flow control */
682 if (op->flags & F_RTSCTS)
683 tp->c_cflag |= CRTSCTS;
686 (void) ioctl(0, TCSETA, tp);
688 /* go to blocking input even in local mode */
689 fcntl(0, F_SETFL, fcntl(0, F_GETFL, 0) & ~O_NONBLOCK);
691 debug("term_io 2\n");
694 /* auto_baud - extract baud rate from modem status message */
695 static void auto_baud(struct termio *tp)
705 * This works only if the modem produces its status code AFTER raising
706 * the DCD line, and if the computer is fast enough to set the proper
707 * baud rate before the message has gone by. We expect a message of the
710 * <junk><number><junk>
712 * The number is interpreted as the baud rate of the incoming call. If the
713 * modem does not tell us the baud rate within one second, we will keep
714 * using the current baud rate. It is advisable to enable BREAK
715 * processing (comma-separated list of baud rates) if the processing of
716 * modem status messages is enabled.
720 * Use 7-bit characters, don't block if input queue is empty. Errors will
721 * be dealt with lateron.
725 tp->c_iflag |= ISTRIP; /* enable 8th-bit stripping */
726 vmin = tp->c_cc[VMIN];
727 tp->c_cc[VMIN] = 0; /* don't block if queue empty */
728 (void) ioctl(0, TCSETA, tp);
731 * Wait for a while, then read everything the modem has said so far and
732 * try to extract the speed of the dial-in call.
736 if ((nread = read(0, buf, sizeof(buf) - 1)) > 0) {
738 for (bp = buf; bp < buf + nread; bp++) {
739 if (isascii(*bp) && isdigit(*bp)) {
740 if ((speed = bcode(bp))) {
741 tp->c_cflag &= ~CBAUD;
742 tp->c_cflag |= speed;
748 /* Restore terminal settings. Errors will be dealt with lateron. */
751 tp->c_cc[VMIN] = vmin;
752 (void) ioctl(0, TCSETA, tp);
755 /* do_prompt - show login prompt, optionally preceded by /etc/issue contents */
756 static void do_prompt(struct options *op, struct termio *tp)
758 #ifdef ISSUE /* optional: show /etc/issue */
759 print_login_issue(op->issue, op->tty);
761 print_login_prompt();
764 /* next_speed - select next baud rate */
765 static void next_speed(struct termio *tp, struct options *op)
767 static int baud_index = FIRST_SPEED; /* current speed index */
769 baud_index = (baud_index + 1) % op->numspeed;
770 tp->c_cflag &= ~CBAUD;
771 tp->c_cflag |= op->speeds[baud_index];
772 (void) ioctl(0, TCSETA, tp);
775 /* get_logname - get user name, establish parity, speed, erase, kill, eol */
776 /* return NULL on failure, logname on success */
777 static char *get_logname(struct options *op, struct chardata *cp, struct termio *tp)
779 static char logname[BUFSIZ];
781 char c; /* input character, full eight bits */
782 char ascval; /* low 7 bits of input character */
783 int bits; /* # of "1" bits per character */
784 int mask; /* mask with 1 bit up */
785 static char *erase[] = { /* backspace-space-backspace */
786 "\010\040\010", /* space parity */
787 "\010\040\010", /* odd parity */
788 "\210\240\210", /* even parity */
789 "\210\240\210", /* no parity */
792 /* Initialize kill, erase, parity etc. (also after switching speeds). */
796 /* Flush pending input (esp. after parsing or switching the baud rate). */
799 (void) ioctl(0, TCFLSH, TCIFLUSH);
801 /* Prompt for and read a login name. */
803 for (*logname = 0; *logname == 0; /* void */ ) {
805 /* Write issue file and prompt, with "parity" bit == 0. */
809 /* Read name, watch for break, parity, erase, kill, end-of-line. */
811 for (bp = logname, cp->eol = 0; cp->eol == 0; /* void */ ) {
813 /* Do not report trivial EINTR/EIO errors. */
815 if (read(0, &c, 1) < 1) {
816 if (errno == EINTR || errno == EIO)
818 error("%s: read: %m", op->tty);
820 /* Do BREAK handling elsewhere. */
822 if ((c == 0) && op->numspeed > 1)
826 /* Do parity bit handling. */
828 if (c != (ascval = (c & 0177))) { /* "parity" bit on ? */
829 for (bits = 1, mask = 1; mask & 0177; mask <<= 1)
831 bits++; /* count "1" bits */
832 cp->parity |= ((bits & 1) ? 1 : 2);
834 /* Do erase, kill and end-of-line processing. */
839 *bp = 0; /* terminate logname */
840 cp->eol = ascval; /* set end-of-line char */
845 cp->erase = ascval; /* set erase character */
847 (void) write(1, erase[cp->parity], 3);
853 cp->kill = ascval; /* set kill character */
854 while (bp > logname) {
855 (void) write(1, erase[cp->parity], 3);
862 if (!isascii(ascval) || !isprint(ascval)) {
863 /* ignore garbage characters */ ;
864 } else if (bp - logname >= sizeof(logname) - 1) {
865 error("%s: input overrun", op->tty);
867 (void) write(1, &c, 1); /* echo the character */
868 *bp++ = ascval; /* and store it */
874 /* Handle names with upper case and no lower case. */
876 if ((cp->capslock = caps_lock(logname))) {
877 for (bp = logname; *bp; bp++)
879 *bp = tolower(*bp); /* map name to lower case */
884 /* termio_final - set the final tty mode bits */
885 static void termio_final(struct options *op, struct termio *tp, struct chardata *cp)
887 /* General terminal-independent stuff. */
889 tp->c_iflag |= IXON | IXOFF; /* 2-way flow control */
890 tp->c_lflag |= ICANON | ISIG | ECHO | ECHOE | ECHOK | ECHOKE;
891 /* no longer| ECHOCTL | ECHOPRT */
892 tp->c_oflag |= OPOST;
893 /* tp->c_cflag = 0; */
894 tp->c_cc[VINTR] = DEF_INTR; /* default interrupt */
895 tp->c_cc[VQUIT] = DEF_QUIT; /* default quit */
896 tp->c_cc[VEOF] = DEF_EOF; /* default EOF character */
897 tp->c_cc[VEOL] = DEF_EOL;
898 tp->c_cc[VSWTC] = DEF_SWITCH; /* default switch character */
900 /* Account for special characters seen in input. */
903 tp->c_iflag |= ICRNL; /* map CR in input to NL */
904 tp->c_oflag |= ONLCR; /* map NL in output to CR-NL */
906 tp->c_cc[VERASE] = cp->erase; /* set erase character */
907 tp->c_cc[VKILL] = cp->kill; /* set kill character */
909 /* Account for the presence or absence of parity bits in input. */
911 switch (cp->parity) {
912 case 0: /* space (always 0) parity */
914 case 1: /* odd parity */
915 tp->c_cflag |= PARODD;
917 case 2: /* even parity */
918 tp->c_cflag |= PARENB;
919 tp->c_iflag |= INPCK | ISTRIP;
921 case (1 | 2): /* no parity bit */
922 tp->c_cflag &= ~CSIZE;
926 /* Account for upper case without lower case. */
929 tp->c_iflag |= IUCLC;
930 tp->c_lflag |= XCASE;
931 tp->c_oflag |= OLCUC;
933 /* Optionally enable hardware flow control */
936 if (op->flags & F_RTSCTS)
937 tp->c_cflag |= CRTSCTS;
940 /* Finally, make the new settings effective */
942 if (ioctl(0, TCSETA, tp) < 0)
943 error("%s: ioctl: TCSETA: %m", op->tty);
946 /* caps_lock - string contains upper case without lower case */
947 /* returns 1 if true, 0 if false */
948 static int caps_lock(const char *s)
952 for (capslock = 0; *s; s++) {
956 capslock = isupper(*s);
961 /* bcode - convert speed string to speed code; return 0 on failure */
962 static int bcode(char *s)
966 if (safe_strtoul(s, &value)) {
969 if ((r = bb_value_to_baud(value)) > 0) {
975 /* error - report errors to console or syslog; only understands %s and %m */
977 #define str2cpy(b,s1,s2) strcat(strcpy(b,s1),s2)
980 * output error messages
982 static void error(const char *fmt, ...)
995 strncpy(buf, bb_applet_name, 256);
996 strncat(buf, ": ", 256);
998 bp = buf + strlen(buf);
1001 va_start(va_alist, fmt);
1002 vsnprintf(bp, 256 - strlen(buf), fmt, va_alist);
1007 openlog(bb_applet_name, 0, LOG_AUTH);
1008 syslog(LOG_ERR, "%s", buf);
1011 strncat(bp, "\r\n", 256 - strlen(buf));
1013 if ((fd = open("/dev/console", 1)) >= 0) {
1014 write(fd, buf, strlen(buf));
1018 (void) sleep((unsigned) 10); /* be kind to init(8) */