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>
32 #ifdef CONFIG_FEATURE_UTMP
36 #define _PATH_LOGIN "/bin/login"
38 /* If USE_SYSLOG is undefined all diagnostics go directly to /dev/console. */
40 #include <sys/param.h>
47 * Some heuristics to find out what environment we are in: if it is not
48 * System V, assume it is SunOS 4.
51 #ifdef LOGIN_PROCESS /* defined in System V utmp.h */
52 #define SYSV_STYLE /* select System V style getty */
53 #ifdef CONFIG_FEATURE_WTMP
54 extern void updwtmp(const char *filename, const struct utmp *ut);
56 #endif /* LOGIN_PROCESS */
59 * Things you may want to modify.
61 * You may disagree with the default line-editing etc. characters defined
62 * below. Note, however, that DEL cannot be used for interrupt generation
63 * and for line editing at the same time.
67 #include <sys/utsname.h>
71 /* If ISSUE is not defined, agetty will never display the contents of the
72 * /etc/issue file. You will not want to spit out large "issue" files at the
75 #define ISSUE "/etc/issue" /* displayed before the login prompt */
77 /* Some shorthands for control characters. */
79 #define CTL(x) (x ^ 0100) /* Assumes ASCII dialect */
80 #define CR CTL('M') /* carriage return */
81 #define NL CTL('J') /* line feed */
82 #define BS CTL('H') /* back space */
83 #define DEL CTL('?') /* delete */
85 /* Defaults for line-editing etc. characters; you may want to change this. */
87 #define DEF_ERASE DEL /* default erase character */
88 #define DEF_INTR CTL('C') /* default interrupt character */
89 #define DEF_QUIT CTL('\\') /* default quit char */
90 #define DEF_KILL CTL('U') /* default kill char */
91 #define DEF_EOF CTL('D') /* default EOF char */
93 #define DEF_SWITCH 0 /* default switch char */
96 * SunOS 4.1.1 termio is broken. We must use the termios stuff instead,
97 * because the termio -> termios translation does not clear the termios
98 * CIBAUD bits. Therefore, the tty driver would sometimes report that input
99 * baud rate != output baud rate. I did not notice that problem with SunOS
100 * 4.1. We will use termios where available, and termio otherwise.
103 /* linux 0.12 termio is broken too, if we use it c_cc[VERASE] isn't set
104 properly, but all is well if we use termios?! */
110 #define termio termios
111 #define TCGETA TCGETS
112 #define TCSETA TCSETS
113 #define TCSETAW TCSETSW
117 * This program tries to not use the standard-i/o library. This keeps the
118 * executable small on systems that do not have shared libraries (System V
126 * When multiple baud rates are specified on the command line, the first one
127 * we will try is the first one specified.
130 #define FIRST_SPEED 0
132 /* Storage for command-line options. */
134 #define MAX_SPEED 10 /* max. nr. of baud rates */
137 int flags; /* toggle switches, see below */
138 int timeout; /* time-out period */
139 char *login; /* login program */
140 char *tty; /* name of tty */
141 char *initstring; /* modem init string */
142 char *issue; /* alternative issue file */
143 int numspeed; /* number of baud rates to try */
144 int speeds[MAX_SPEED]; /* baud rates to be tried */
147 #define F_PARSE (1<<0) /* process modem status messages */
148 #define F_ISSUE (1<<1) /* display /etc/issue */
149 #define F_RTSCTS (1<<2) /* enable RTS/CTS flow control */
150 #define F_LOCAL (1<<3) /* force local */
151 #define F_INITSTRING (1<<4) /* initstring is set */
152 #define F_WAITCRLF (1<<5) /* wait for CR or LF */
153 #define F_CUSTISSUE (1<<6) /* give alternative issue file */
154 #define F_NOPROMPT (1<<7) /* don't ask for login name! */
156 /* Storage for things detected while the login name was read. */
159 int erase; /* erase character */
160 int kill; /* kill character */
161 int eol; /* end-of-line character */
162 int parity; /* what parity did we see */
163 int capslock; /* upper case without lower case */
166 /* Initial values for the above. */
168 static struct chardata init_chardata = {
169 DEF_ERASE, /* default erase character */
170 DEF_KILL, /* default kill character */
171 13, /* default eol char */
172 0, /* space parity */
182 static struct Speedtab speedtab[] = {
221 static void parse_args(int argc, char **argv, struct options *op);
222 static void parse_speeds(struct options *op, char *arg);
223 static void open_tty(char *tty, struct termio *tp, int local);
224 static void termio_init(struct termio *tp, int speed, struct options *op);
225 static void auto_baud(struct termio *tp);
226 static void do_prompt(struct options *op, struct termio *tp);
227 static void next_speed(struct termio *tp, struct options *op);
228 static char *get_logname(struct options *op, struct chardata *cp,
231 static void termio_final(struct options *op, struct termio *tp,
233 struct chardata *cp);
234 static int caps_lock(const char *s);
235 static int bcode(char *s);
236 static void error(const char *fmt, ...) __attribute__ ((noreturn));
239 #ifdef CONFIG_FEATURE_UTMP
240 static void update_utmp(char *line);
244 /* The following is used for understandable diagnostics. */
246 /* Fake hostname for ut_host specified on command line. */
247 static char *fakehost = NULL;
251 #define debug(s) fprintf(dbf,s); fflush(dbf)
252 #define DEBUGTERM "/dev/ttyp0"
255 #define debug(s) /* nothing */
258 int getty_main(int argc, char **argv)
260 char *logname = NULL; /* login name, given to /bin/login */
261 struct chardata chardata; /* set by get_logname() */
262 struct termio termio; /* terminal mode bits */
263 static struct options options = {
264 F_ISSUE, /* show /etc/issue (SYSV_STYLE) */
266 _PATH_LOGIN, /* default login program */
267 "tty1", /* default tty line */
268 "", /* modem init string */
270 ISSUE, /* default issue file */
274 0, /* no baud rates known yet */
278 dbf = bb_xfopen(DEBUGTERM, "w");
283 for (i = 1; i < argc; i++) {
290 /* Parse command-line arguments. */
292 parse_args(argc, argv, &options);
298 /* Update the utmp file. */
302 #ifdef CONFIG_FEATURE_UTMP
303 update_utmp(options.tty);
307 debug("calling open_tty\n");
308 /* Open the tty as standard { input, output, error }. */
309 open_tty(options.tty, &termio, options.flags & F_LOCAL);
316 ioctl(0, TIOCSPGRP, &iv);
319 /* Initialize the termio settings (raw mode, eight-bit, blocking i/o). */
320 debug("calling termio_init\n");
321 termio_init(&termio, options.speeds[FIRST_SPEED], &options);
323 /* write the modem init string and DON'T flush the buffers */
324 if (options.flags & F_INITSTRING) {
325 debug("writing init string\n");
326 write(1, options.initstring, strlen(options.initstring));
329 if (!(options.flags & F_LOCAL)) {
330 /* go to blocking write mode unless -L is specified */
331 fcntl(1, F_SETFL, fcntl(1, F_GETFL, 0) & ~O_NONBLOCK);
334 /* Optionally detect the baud rate from the modem status message. */
335 debug("before autobaud\n");
336 if (options.flags & F_PARSE)
339 /* Set the optional timer. */
341 (void) alarm((unsigned) options.timeout);
343 /* optionally wait for CR or LF before writing /etc/issue */
344 if (options.flags & F_WAITCRLF) {
347 debug("waiting for cr-lf\n");
348 while (read(0, &ch, 1) == 1) {
349 ch &= 0x7f; /* strip "parity bit" */
351 fprintf(dbf, "read %c\n", ch);
353 if (ch == '\n' || ch == '\r')
358 chardata = init_chardata;
359 if (!(options.flags & F_NOPROMPT)) {
360 /* Read the login name. */
361 debug("reading login name\n");
362 /* while ((logname = get_logname(&options, &chardata, &termio)) == 0) */
363 while ((logname = get_logname(&options, &chardata, &termio)) ==
364 NULL) next_speed(&termio, &options);
372 /* Finalize the termio settings. */
374 termio_final(&options, &termio, &chardata);
376 /* Now the newline character should be properly written. */
378 (void) write(1, "\n", 1);
380 /* Let the login program take care of password validation. */
382 (void) execl(options.login, options.login, "--", logname, (char *) 0);
383 error("%s: can't exec %s: %m", options.tty, options.login);
386 /* parse-args - parse command-line arguments */
388 static void parse_args(int argc, char **argv, struct options *op)
390 extern char *optarg; /* getopt */
391 extern int optind; /* getopt */
394 while (isascii(c = getopt(argc, argv, "I:LH:f:hil:mt:wn"))) {
397 if (!(op->initstring = strdup(optarg)))
398 error(bb_msg_memory_exhausted);
404 /* copy optarg into op->initstring decoding \ddd
405 octal codes into chars */
411 *q++ = bb_process_escape_sequence(&p);
418 op->flags |= F_INITSTRING;
421 case 'L': /* force local */
422 op->flags |= F_LOCAL;
424 case 'H': /* fake login host */
427 case 'f': /* custom issue file */
428 op->flags |= F_CUSTISSUE;
431 case 'h': /* enable h/w flow control */
432 op->flags |= F_RTSCTS;
434 case 'i': /* do not show /etc/issue */
435 op->flags &= ~F_ISSUE;
438 op->login = optarg; /* non-default login program */
440 case 'm': /* parse modem status message */
441 op->flags |= F_PARSE;
444 op->flags |= F_NOPROMPT;
446 case 't': /* time out */
447 if ((op->timeout = atoi(optarg)) <= 0)
448 error("bad timeout value: %s", optarg);
451 op->flags |= F_WAITCRLF;
457 debug("after getopt loop\n");
458 if (argc < optind + 2) /* check parameter count */
461 /* we loosen up a bit and accept both "baudrate tty" and "tty baudrate" */
462 if ('0' <= argv[optind][0] && argv[optind][0] <= '9') {
463 /* a number first, assume it's a speed (BSD style) */
464 parse_speeds(op, argv[optind++]); /* baud rate(s) */
465 op->tty = argv[optind]; /* tty name */
467 op->tty = argv[optind++]; /* tty name */
468 parse_speeds(op, argv[optind]); /* baud rate(s) */
472 if (argc > optind && argv[optind])
473 setenv("TERM", argv[optind], 1);
475 debug("exiting parseargs\n");
478 /* parse_speeds - parse alternate baud rates */
480 static void parse_speeds(struct options *op, char *arg)
484 debug("entered parse_speeds\n");
485 for (cp = strtok(arg, ","); cp != 0; cp = strtok((char *) 0, ",")) {
486 if ((op->speeds[op->numspeed++] = bcode(cp)) <= 0)
487 error("bad speed: %s", cp);
488 if (op->numspeed > MAX_SPEED)
489 error("too many alternate speeds");
491 debug("exiting parsespeeds\n");
495 #ifdef CONFIG_FEATURE_UTMP
497 /* update_utmp - update our utmp entry */
498 static void update_utmp(char *line)
503 int mypid = getpid();
504 #if ! (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 1))
509 * The utmp file holds miscellaneous information about things started by
510 * /sbin/init and other system-related events. Our purpose is to update
511 * the utmp entry for the current process, in particular the process type
512 * and the tty line we are listening to. Return successfully only if the
513 * utmp file can be opened for update, and if we are able to find our
514 * entry in the utmp file.
516 if (access(_PATH_UTMP, R_OK|W_OK) == -1) {
517 close(creat(_PATH_UTMP, 0664));
519 utmpname(_PATH_UTMP);
521 while ((utp = getutent())
522 && !(utp->ut_type == INIT_PROCESS && utp->ut_pid == mypid)) /* nothing */
526 memcpy(&ut, utp, sizeof(ut));
528 /* some inits don't initialize utmp... */
529 memset(&ut, 0, sizeof(ut));
530 strncpy(ut.ut_id, line + 3, sizeof(ut.ut_id));
534 strncpy(ut.ut_user, "LOGIN", sizeof(ut.ut_user));
535 strncpy(ut.ut_line, line, sizeof(ut.ut_line));
537 strncpy(ut.ut_host, fakehost, sizeof(ut.ut_host));
540 ut.ut_type = LOGIN_PROCESS;
546 #ifdef CONFIG_FEATURE_WTMP
547 if (access(_PATH_WTMP, R_OK|W_OK) == -1)
548 close(creat(_PATH_WTMP, 0664));
549 updwtmp(_PATH_WTMP, &ut);
553 #endif /* CONFIG_FEATURE_UTMP */
554 #endif /* SYSV_STYLE */
556 /* open_tty - set up tty as standard { input, output, error } */
557 static void open_tty(char *tty, struct termio *tp, int local)
559 /* Set up new standard input, unless we are given an already opened port. */
561 if (strcmp(tty, "-")) {
565 /* Sanity checks... */
568 error("/dev: chdir() failed: %m");
569 if (stat(tty, &st) < 0)
570 error("/dev/%s: %m", tty);
571 if ((st.st_mode & S_IFMT) != S_IFCHR)
572 error("/dev/%s: not a character device", tty);
574 /* Open the tty as standard input. */
577 fd = open(tty, O_RDWR | O_NONBLOCK, 0);
578 if (dup2(fd, STDIN_FILENO) == -1)
579 error("/dev/%s: cannot open as standard input: %m", tty);
585 * Standard input should already be connected to an open port. Make
586 * sure it is open for read/write.
589 if ((fcntl(0, F_GETFL, 0) & O_RDWR) != O_RDWR)
590 error("%s: not open for read/write", tty);
593 /* Replace current standard output/error fd's with new ones */
595 if (dup2(STDIN_FILENO, STDOUT_FILENO) == -1 ||
596 dup2(STDIN_FILENO, STDERR_FILENO) == -1)
597 error("%s: dup problem: %m", tty); /* we have a problem */
600 * The following ioctl will fail if stdin is not a tty, but also when
601 * there is noise on the modem control lines. In the latter case, the
602 * common course of action is (1) fix your cables (2) give the modem more
603 * time to properly reset after hanging up. SunOS users can achieve (2)
604 * by patching the SunOS kernel variable "zsadtrlow" to a larger value;
605 * 5 seconds seems to be a good value.
608 if (ioctl(0, TCGETA, tp) < 0)
609 error("%s: ioctl: %m", tty);
612 * It seems to be a terminal. Set proper protections and ownership. Mode
613 * 0622 is suitable for SYSV <4 because /bin/login does not change
614 * protections. SunOS 4 login will change the protections to 0620 (write
615 * access for group tty) after the login has succeeded.
620 /* tty to root.dialout 660 */
624 id = (gr = getgrnam("dialout")) ? gr->gr_gid : 0;
628 /* vcs,vcsa to root.sys 600 */
629 if (!strncmp(tty, "tty", 3) && isdigit(tty[3])) {
632 if (!(vcs = strdup(tty)))
633 error("Can't malloc for vcs");
634 if (!(vcsa = malloc(strlen(tty) + 2)))
635 error("Can't malloc for vcsa");
637 strcpy(vcs + 3, tty + 3);
638 strcpy(vcsa, "vcsa");
639 strcpy(vcsa + 4, tty + 3);
641 id = (gr = getgrnam("sys")) ? gr->gr_gid : 0;
652 (void) chown(tty, 0, 0); /* root, sys */
653 (void) chmod(tty, 0622); /* crw--w--w- */
654 errno = 0; /* ignore above errors */
658 /* termio_init - initialize termio settings */
660 static void termio_init(struct termio *tp, int speed, struct options *op)
664 * Initial termio settings: 8-bit characters, raw-mode, blocking i/o.
665 * Special characters are set after we have read the login name; all
666 * reads will be done in raw mode anyway. Errors will be dealt with
670 /* flush input and output queues, important for modems! */
671 (void) ioctl(0, TCFLSH, TCIOFLUSH);
674 tp->c_cflag = CS8 | HUPCL | CREAD | speed;
675 if (op->flags & F_LOCAL) {
676 tp->c_cflag |= CLOCAL;
679 tp->c_iflag = tp->c_lflag = tp->c_oflag = tp->c_line = 0;
683 /* Optionally enable hardware flow control */
686 if (op->flags & F_RTSCTS)
687 tp->c_cflag |= CRTSCTS;
690 (void) ioctl(0, TCSETA, tp);
692 /* go to blocking input even in local mode */
693 fcntl(0, F_SETFL, fcntl(0, F_GETFL, 0) & ~O_NONBLOCK);
695 debug("term_io 2\n");
698 /* auto_baud - extract baud rate from modem status message */
699 static void auto_baud(struct termio *tp)
709 * This works only if the modem produces its status code AFTER raising
710 * the DCD line, and if the computer is fast enough to set the proper
711 * baud rate before the message has gone by. We expect a message of the
714 * <junk><number><junk>
716 * The number is interpreted as the baud rate of the incoming call. If the
717 * modem does not tell us the baud rate within one second, we will keep
718 * using the current baud rate. It is advisable to enable BREAK
719 * processing (comma-separated list of baud rates) if the processing of
720 * modem status messages is enabled.
724 * Use 7-bit characters, don't block if input queue is empty. Errors will
725 * be dealt with lateron.
729 tp->c_iflag |= ISTRIP; /* enable 8th-bit stripping */
730 vmin = tp->c_cc[VMIN];
731 tp->c_cc[VMIN] = 0; /* don't block if queue empty */
732 (void) ioctl(0, TCSETA, tp);
735 * Wait for a while, then read everything the modem has said so far and
736 * try to extract the speed of the dial-in call.
740 if ((nread = read(0, buf, sizeof(buf) - 1)) > 0) {
742 for (bp = buf; bp < buf + nread; bp++) {
743 if (isascii(*bp) && isdigit(*bp)) {
744 if ((speed = bcode(bp))) {
745 tp->c_cflag &= ~CBAUD;
746 tp->c_cflag |= speed;
752 /* Restore terminal settings. Errors will be dealt with lateron. */
755 tp->c_cc[VMIN] = vmin;
756 (void) ioctl(0, TCSETA, tp);
759 /* do_prompt - show login prompt, optionally preceded by /etc/issue contents */
760 static void do_prompt(struct options *op, struct termio *tp)
762 #ifdef ISSUE /* optional: show /etc/issue */
763 print_login_issue(op->issue, op->tty);
765 print_login_prompt();
768 /* next_speed - select next baud rate */
769 static void next_speed(struct termio *tp, struct options *op)
771 static int baud_index = FIRST_SPEED; /* current speed index */
773 baud_index = (baud_index + 1) % op->numspeed;
774 tp->c_cflag &= ~CBAUD;
775 tp->c_cflag |= op->speeds[baud_index];
776 (void) ioctl(0, TCSETA, tp);
779 /* get_logname - get user name, establish parity, speed, erase, kill, eol */
780 /* return NULL on failure, logname on success */
781 static char *get_logname(struct options *op, struct chardata *cp, struct termio *tp)
783 static char logname[BUFSIZ];
785 char c; /* input character, full eight bits */
786 char ascval; /* low 7 bits of input character */
787 int bits; /* # of "1" bits per character */
788 int mask; /* mask with 1 bit up */
789 static char *erase[] = { /* backspace-space-backspace */
790 "\010\040\010", /* space parity */
791 "\010\040\010", /* odd parity */
792 "\210\240\210", /* even parity */
793 "\210\240\210", /* no parity */
796 /* Initialize kill, erase, parity etc. (also after switching speeds). */
800 /* Flush pending input (esp. after parsing or switching the baud rate). */
803 (void) ioctl(0, TCFLSH, TCIFLUSH);
805 /* Prompt for and read a login name. */
807 for (*logname = 0; *logname == 0; /* void */ ) {
809 /* Write issue file and prompt, with "parity" bit == 0. */
813 /* Read name, watch for break, parity, erase, kill, end-of-line. */
815 for (bp = logname, cp->eol = 0; cp->eol == 0; /* void */ ) {
817 /* Do not report trivial EINTR/EIO errors. */
819 if (read(0, &c, 1) < 1) {
820 if (errno == EINTR || errno == EIO)
822 error("%s: read: %m", op->tty);
824 /* Do BREAK handling elsewhere. */
826 if ((c == 0) && op->numspeed > 1)
830 /* Do parity bit handling. */
832 if (c != (ascval = (c & 0177))) { /* "parity" bit on ? */
833 for (bits = 1, mask = 1; mask & 0177; mask <<= 1)
835 bits++; /* count "1" bits */
836 cp->parity |= ((bits & 1) ? 1 : 2);
838 /* Do erase, kill and end-of-line processing. */
843 *bp = 0; /* terminate logname */
844 cp->eol = ascval; /* set end-of-line char */
849 cp->erase = ascval; /* set erase character */
851 (void) write(1, erase[cp->parity], 3);
857 cp->kill = ascval; /* set kill character */
858 while (bp > logname) {
859 (void) write(1, erase[cp->parity], 3);
866 if (!isascii(ascval) || !isprint(ascval)) {
867 /* ignore garbage characters */ ;
868 } else if (bp - logname >= sizeof(logname) - 1) {
869 error("%s: input overrun", op->tty);
871 (void) write(1, &c, 1); /* echo the character */
872 *bp++ = ascval; /* and store it */
878 /* Handle names with upper case and no lower case. */
880 if ((cp->capslock = caps_lock(logname))) {
881 for (bp = logname; *bp; bp++)
883 *bp = tolower(*bp); /* map name to lower case */
888 /* termio_final - set the final tty mode bits */
889 static void termio_final(struct options *op, struct termio *tp, struct chardata *cp)
891 /* General terminal-independent stuff. */
893 tp->c_iflag |= IXON | IXOFF; /* 2-way flow control */
894 tp->c_lflag |= ICANON | ISIG | ECHO | ECHOE | ECHOK | ECHOKE;
895 /* no longer| ECHOCTL | ECHOPRT */
896 tp->c_oflag |= OPOST;
897 /* tp->c_cflag = 0; */
898 tp->c_cc[VINTR] = DEF_INTR; /* default interrupt */
899 tp->c_cc[VQUIT] = DEF_QUIT; /* default quit */
900 tp->c_cc[VEOF] = DEF_EOF; /* default EOF character */
901 tp->c_cc[VEOL] = DEF_EOL;
902 tp->c_cc[VSWTC] = DEF_SWITCH; /* default switch character */
904 /* Account for special characters seen in input. */
907 tp->c_iflag |= ICRNL; /* map CR in input to NL */
908 tp->c_oflag |= ONLCR; /* map NL in output to CR-NL */
910 tp->c_cc[VERASE] = cp->erase; /* set erase character */
911 tp->c_cc[VKILL] = cp->kill; /* set kill character */
913 /* Account for the presence or absence of parity bits in input. */
915 switch (cp->parity) {
916 case 0: /* space (always 0) parity */
918 case 1: /* odd parity */
919 tp->c_cflag |= PARODD;
921 case 2: /* even parity */
922 tp->c_cflag |= PARENB;
923 tp->c_iflag |= INPCK | ISTRIP;
925 case (1 | 2): /* no parity bit */
926 tp->c_cflag &= ~CSIZE;
930 /* Account for upper case without lower case. */
933 tp->c_iflag |= IUCLC;
934 tp->c_lflag |= XCASE;
935 tp->c_oflag |= OLCUC;
937 /* Optionally enable hardware flow control */
940 if (op->flags & F_RTSCTS)
941 tp->c_cflag |= CRTSCTS;
944 /* Finally, make the new settings effective */
946 if (ioctl(0, TCSETA, tp) < 0)
947 error("%s: ioctl: TCSETA: %m", op->tty);
950 /* caps_lock - string contains upper case without lower case */
951 /* returns 1 if true, 0 if false */
952 static int caps_lock(const char *s)
956 for (capslock = 0; *s; s++) {
960 capslock = isupper(*s);
965 /* bcode - convert speed string to speed code; return 0 on failure */
966 static int bcode(char *s)
970 if (safe_strtoul(s, &value)) {
973 if ((r = bb_value_to_baud(value)) > 0) {
979 /* error - report errors to console or syslog; only understands %s and %m */
981 #define str2cpy(b,s1,s2) strcat(strcpy(b,s1),s2)
984 * output error messages
986 static void error(const char *fmt, ...)
999 strncpy(buf, bb_applet_name, 256);
1000 strncat(buf, ": ", 256);
1002 bp = buf + strlen(buf);
1005 va_start(va_alist, fmt);
1006 vsnprintf(bp, 256 - strlen(buf), fmt, va_alist);
1011 openlog(bb_applet_name, 0, LOG_AUTH);
1012 syslog(LOG_ERR, "%s", buf);
1015 strncat(bp, "\r\n", 256 - strlen(buf));
1017 if ((fd = open("/dev/console", 1)) >= 0) {
1018 write(fd, buf, strlen(buf));
1022 (void) sleep((unsigned) 10); /* be kind to init(8) */