Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
| 2 | /* agetty.c - another getty program for Linux. By W. Z. Venema 1989 |
"Robert P. J. Day" | 801ab14 | 2006-07-12 07:56:04 +0000 | [diff] [blame] | 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. |
| 6 | * |
| 7 | * option added by Eric Rasmussen <ear@usfirst.org> - 12/28/95 |
| 8 | * |
Denis Vlasenko | b44c790 | 2008-03-17 09:29:43 +0000 | [diff] [blame] | 9 | * 1999-02-22 Arkadiusz Mickiewicz <misiek@misiek.eu.org> |
"Robert P. J. Day" | 801ab14 | 2006-07-12 07:56:04 +0000 | [diff] [blame] | 10 | * - added Native Language Support |
Denis Vlasenko | b44c790 | 2008-03-17 09:29:43 +0000 | [diff] [blame] | 11 | * |
"Robert P. J. Day" | 801ab14 | 2006-07-12 07:56:04 +0000 | [diff] [blame] | 12 | * 1999-05-05 Thorsten Kranzkowski <dl8bcu@gmx.net> |
| 13 | * - enable hardware flow control before displaying /etc/issue |
| 14 | * |
| 15 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
"Robert P. J. Day" | 801ab14 | 2006-07-12 07:56:04 +0000 | [diff] [blame] | 16 | */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 17 | |
Denis Vlasenko | b6adbf1 | 2007-05-26 19:00:18 +0000 | [diff] [blame] | 18 | #include "libbb.h" |
Denis Vlasenko | f702652 | 2006-09-19 13:50:55 +0000 | [diff] [blame] | 19 | #include <syslog.h> |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 20 | |
Denis Vlasenko | 6476cc1 | 2006-11-07 01:52:10 +0000 | [diff] [blame] | 21 | #if ENABLE_FEATURE_UTMP |
Mike Frysinger | b381009 | 2005-07-01 01:29:44 +0000 | [diff] [blame] | 22 | #include <utmp.h> |
| 23 | #endif |
| 24 | |
Denis Vlasenko | 6476cc1 | 2006-11-07 01:52:10 +0000 | [diff] [blame] | 25 | /* |
| 26 | * Some heuristics to find out what environment we are in: if it is not |
| 27 | * System V, assume it is SunOS 4. |
| 28 | */ |
"Vladimir N. Oleynik" | 3e245c9 | 2005-09-29 11:31:26 +0000 | [diff] [blame] | 29 | #ifdef LOGIN_PROCESS /* defined in System V utmp.h */ |
Denis Vlasenko | 6476cc1 | 2006-11-07 01:52:10 +0000 | [diff] [blame] | 30 | #include <sys/utsname.h> |
| 31 | #include <time.h> |
| 32 | #if ENABLE_FEATURE_WTMP |
Eric Andersen | fdfe298 | 2002-10-10 03:55:09 +0000 | [diff] [blame] | 33 | extern void updwtmp(const char *filename, const struct utmp *ut); |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 34 | #endif |
Denis Vlasenko | f3fca91 | 2007-12-04 18:46:01 +0000 | [diff] [blame] | 35 | #else /* if !sysV style, wtmp/utmp code is off */ |
| 36 | #undef ENABLE_FEATURE_UTMP |
| 37 | #undef ENABLE_FEATURE_WTMP |
| 38 | #define ENABLE_FEATURE_UTMP 0 |
| 39 | #define ENABLE_FEATURE_WTMP 0 |
Eric Andersen | fdfe298 | 2002-10-10 03:55:09 +0000 | [diff] [blame] | 40 | #endif /* LOGIN_PROCESS */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 41 | |
Denis Vlasenko | 6476cc1 | 2006-11-07 01:52:10 +0000 | [diff] [blame] | 42 | /* |
| 43 | * Things you may want to modify. |
| 44 | * |
| 45 | * You may disagree with the default line-editing etc. characters defined |
| 46 | * below. Note, however, that DEL cannot be used for interrupt generation |
| 47 | * and for line editing at the same time. |
| 48 | */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 49 | |
Denis Vlasenko | 4e70bf4 | 2006-10-23 10:17:34 +0000 | [diff] [blame] | 50 | /* I doubt there are systems which still need this */ |
| 51 | #undef HANDLE_ALLCAPS |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 52 | #undef ANCIENT_BS_KILL_CHARS |
Denis Vlasenko | 4e70bf4 | 2006-10-23 10:17:34 +0000 | [diff] [blame] | 53 | |
Denis Vlasenko | 6476cc1 | 2006-11-07 01:52:10 +0000 | [diff] [blame] | 54 | #define _PATH_LOGIN "/bin/login" |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 55 | |
Denis Vlasenko | 6476cc1 | 2006-11-07 01:52:10 +0000 | [diff] [blame] | 56 | /* If ISSUE is not defined, getty will never display the contents of the |
| 57 | * /etc/issue file. You will not want to spit out large "issue" files at the |
| 58 | * wrong baud rate. |
| 59 | */ |
"Vladimir N. Oleynik" | 3e245c9 | 2005-09-29 11:31:26 +0000 | [diff] [blame] | 60 | #define ISSUE "/etc/issue" /* displayed before the login prompt */ |
Eric Andersen | 77804ce | 2005-07-27 06:05:38 +0000 | [diff] [blame] | 61 | |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 62 | /* Some shorthands for control characters. */ |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 63 | #define CTL(x) ((x) ^ 0100) /* Assumes ASCII dialect */ |
"Vladimir N. Oleynik" | 3e245c9 | 2005-09-29 11:31:26 +0000 | [diff] [blame] | 64 | #define CR CTL('M') /* carriage return */ |
| 65 | #define NL CTL('J') /* line feed */ |
| 66 | #define BS CTL('H') /* back space */ |
| 67 | #define DEL CTL('?') /* delete */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 68 | |
| 69 | /* Defaults for line-editing etc. characters; you may want to change this. */ |
"Vladimir N. Oleynik" | 3e245c9 | 2005-09-29 11:31:26 +0000 | [diff] [blame] | 70 | #define DEF_ERASE DEL /* default erase character */ |
| 71 | #define DEF_INTR CTL('C') /* default interrupt character */ |
| 72 | #define DEF_QUIT CTL('\\') /* default quit char */ |
| 73 | #define DEF_KILL CTL('U') /* default kill char */ |
| 74 | #define DEF_EOF CTL('D') /* default EOF char */ |
| 75 | #define DEF_EOL '\n' |
| 76 | #define DEF_SWITCH 0 /* default switch char */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 77 | |
Denis Vlasenko | 6476cc1 | 2006-11-07 01:52:10 +0000 | [diff] [blame] | 78 | /* |
| 79 | * When multiple baud rates are specified on the command line, the first one |
| 80 | * we will try is the first one specified. |
| 81 | */ |
"Vladimir N. Oleynik" | 3e245c9 | 2005-09-29 11:31:26 +0000 | [diff] [blame] | 82 | #define MAX_SPEED 10 /* max. nr. of baud rates */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 83 | |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 84 | /* Storage for command-line options. */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 85 | struct options { |
"Vladimir N. Oleynik" | 3e245c9 | 2005-09-29 11:31:26 +0000 | [diff] [blame] | 86 | int flags; /* toggle switches, see below */ |
Denis Vlasenko | 1385899 | 2006-10-08 12:49:22 +0000 | [diff] [blame] | 87 | unsigned timeout; /* time-out period */ |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 88 | const char *login; /* login program */ |
| 89 | const char *tty; /* name of tty */ |
| 90 | const char *initstring; /* modem init string */ |
| 91 | const char *issue; /* alternative issue file */ |
"Vladimir N. Oleynik" | 3e245c9 | 2005-09-29 11:31:26 +0000 | [diff] [blame] | 92 | int numspeed; /* number of baud rates to try */ |
| 93 | int speeds[MAX_SPEED]; /* baud rates to be tried */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 94 | }; |
| 95 | |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 96 | /* Storage for things detected while the login name was read. */ |
Mike Frysinger | b381009 | 2005-07-01 01:29:44 +0000 | [diff] [blame] | 97 | struct chardata { |
Denis Vlasenko | 4e70bf4 | 2006-10-23 10:17:34 +0000 | [diff] [blame] | 98 | unsigned char erase; /* erase character */ |
| 99 | unsigned char kill; /* kill character */ |
| 100 | unsigned char eol; /* end-of-line character */ |
| 101 | unsigned char parity; /* what parity did we see */ |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 102 | /* (parity & 1): saw odd parity char with 7th bit set */ |
| 103 | /* (parity & 2): saw even parity char with 7th bit set */ |
| 104 | /* parity == 0: probably 7-bit, space parity? */ |
| 105 | /* parity == 1: probably 7-bit, odd parity? */ |
| 106 | /* parity == 2: probably 7-bit, even parity? */ |
| 107 | /* parity == 3: definitely 8 bit, no parity! */ |
| 108 | /* Hmm... with any value of "parity" 8 bit, no parity is possible */ |
Denis Vlasenko | 4e70bf4 | 2006-10-23 10:17:34 +0000 | [diff] [blame] | 109 | #ifdef HANDLE_ALLCAPS |
| 110 | unsigned char capslock; /* upper case without lower case */ |
| 111 | #endif |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 112 | }; |
| 113 | |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 114 | |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 115 | /* Initial values for the above. */ |
Denis Vlasenko | dce3fde | 2006-10-23 02:10:45 +0000 | [diff] [blame] | 116 | static const struct chardata init_chardata = { |
"Vladimir N. Oleynik" | 3e245c9 | 2005-09-29 11:31:26 +0000 | [diff] [blame] | 117 | DEF_ERASE, /* default erase character */ |
| 118 | DEF_KILL, /* default kill character */ |
| 119 | 13, /* default eol char */ |
| 120 | 0, /* space parity */ |
Denis Vlasenko | 4e70bf4 | 2006-10-23 10:17:34 +0000 | [diff] [blame] | 121 | #ifdef HANDLE_ALLCAPS |
"Vladimir N. Oleynik" | 3e245c9 | 2005-09-29 11:31:26 +0000 | [diff] [blame] | 122 | 0, /* no capslock */ |
Denis Vlasenko | 4e70bf4 | 2006-10-23 10:17:34 +0000 | [diff] [blame] | 123 | #endif |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 124 | }; |
| 125 | |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 126 | static const char opt_string[] ALIGN1 = "I:LH:f:hil:mt:wn"; |
| 127 | #define F_INITSTRING (1 << 0) /* -I initstring is set */ |
| 128 | #define F_LOCAL (1 << 1) /* -L force local */ |
Denis Vlasenko | f3fca91 | 2007-12-04 18:46:01 +0000 | [diff] [blame] | 129 | #define F_FAKEHOST (1 << 2) /* -H fake hostname */ |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 130 | #define F_CUSTISSUE (1 << 3) /* -f give alternative issue file */ |
| 131 | #define F_RTSCTS (1 << 4) /* -h enable RTS/CTS flow control */ |
| 132 | #define F_ISSUE (1 << 5) /* -i display /etc/issue */ |
| 133 | #define F_LOGIN (1 << 6) /* -l non-default login program */ |
| 134 | #define F_PARSE (1 << 7) /* -m process modem status messages */ |
| 135 | #define F_TIMEOUT (1 << 8) /* -t time out */ |
| 136 | #define F_WAITCRLF (1 << 9) /* -w wait for CR or LF */ |
Denis Vlasenko | f3fca91 | 2007-12-04 18:46:01 +0000 | [diff] [blame] | 137 | #define F_NOPROMPT (1 << 10) /* -n don't ask for login name */ |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 138 | |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 139 | |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 140 | #define line_buf bb_common_bufsiz1 |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 141 | |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 142 | /* The following is used for understandable diagnostics. */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 143 | #ifdef DEBUGGING |
Denis Vlasenko | 4e70bf4 | 2006-10-23 10:17:34 +0000 | [diff] [blame] | 144 | static FILE *dbf; |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 145 | #define DEBUGTERM "/dev/ttyp0" |
| 146 | #define debug(...) do { fprintf(dbf, __VA_ARGS__); fflush(dbf); } while (0) |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 147 | #else |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 148 | #define debug(...) ((void)0) |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 149 | #endif |
| 150 | |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 151 | |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 152 | /* bcode - convert speed string to speed code; return <= 0 on failure */ |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 153 | static int bcode(const char *s) |
| 154 | { |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 155 | int value = bb_strtou(s, NULL, 10); /* yes, int is intended! */ |
| 156 | if (value < 0) /* bad terminating char, overflow, etc */ |
| 157 | return value; |
| 158 | return tty_value_to_baud(value); |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 159 | } |
| 160 | |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 161 | /* parse_speeds - parse alternate baud rates */ |
| 162 | static void parse_speeds(struct options *op, char *arg) |
| 163 | { |
| 164 | char *cp; |
| 165 | |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 166 | /* NB: at least one iteration is always done */ |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 167 | debug("entered parse_speeds\n"); |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 168 | while ((cp = strsep(&arg, ",")) != NULL) { |
Denis Vlasenko | 6bef3d1 | 2007-11-06 03:05:54 +0000 | [diff] [blame] | 169 | op->speeds[op->numspeed] = bcode(cp); |
| 170 | if (op->speeds[op->numspeed] <= 0) |
Denis Vlasenko | a980165 | 2006-09-07 16:20:03 +0000 | [diff] [blame] | 171 | bb_error_msg_and_die("bad speed: %s", cp); |
Denis Vlasenko | 6bef3d1 | 2007-11-06 03:05:54 +0000 | [diff] [blame] | 172 | op->numspeed++; |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 173 | if (op->numspeed > MAX_SPEED) |
Denis Vlasenko | a980165 | 2006-09-07 16:20:03 +0000 | [diff] [blame] | 174 | bb_error_msg_and_die("too many alternate speeds"); |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 175 | } |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 176 | debug("exiting parse_speeds\n"); |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 177 | } |
| 178 | |
Denis Vlasenko | a980165 | 2006-09-07 16:20:03 +0000 | [diff] [blame] | 179 | /* parse_args - parse command-line arguments */ |
Denis Vlasenko | f3fca91 | 2007-12-04 18:46:01 +0000 | [diff] [blame] | 180 | static void parse_args(char **argv, struct options *op, char **fakehost_p) |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 181 | { |
"Vladimir N. Oleynik" | 3e245c9 | 2005-09-29 11:31:26 +0000 | [diff] [blame] | 182 | char *ts; |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 183 | |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 184 | opt_complementary = "-2:t+"; /* at least 2 args; -t N */ |
Denis Vlasenko | fe7cd64 | 2007-08-18 15:32:12 +0000 | [diff] [blame] | 185 | op->flags = getopt32(argv, opt_string, |
Denis Vlasenko | f3fca91 | 2007-12-04 18:46:01 +0000 | [diff] [blame] | 186 | &(op->initstring), fakehost_p, &(op->issue), |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 187 | &(op->login), &op->timeout); |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 188 | argv += optind; |
Denis Vlasenko | dce3fde | 2006-10-23 02:10:45 +0000 | [diff] [blame] | 189 | if (op->flags & F_INITSTRING) { |
"Vladimir N. Oleynik" | 3e245c9 | 2005-09-29 11:31:26 +0000 | [diff] [blame] | 190 | const char *p = op->initstring; |
| 191 | char *q; |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 192 | |
Denis Vlasenko | f3fca91 | 2007-12-04 18:46:01 +0000 | [diff] [blame] | 193 | op->initstring = q = xstrdup(p); |
"Vladimir N. Oleynik" | 3e245c9 | 2005-09-29 11:31:26 +0000 | [diff] [blame] | 194 | /* copy optarg into op->initstring decoding \ddd |
| 195 | octal codes into chars */ |
| 196 | while (*p) { |
| 197 | if (*p == '\\') { |
| 198 | p++; |
| 199 | *q++ = bb_process_escape_sequence(&p); |
| 200 | } else { |
| 201 | *q++ = *p++; |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 202 | } |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 203 | } |
"Vladimir N. Oleynik" | 3e245c9 | 2005-09-29 11:31:26 +0000 | [diff] [blame] | 204 | *q = '\0'; |
| 205 | } |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 206 | op->flags ^= F_ISSUE; /* invert flag "show /etc/issue" */ |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 207 | debug("after getopt\n"); |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 208 | |
| 209 | /* we loosen up a bit and accept both "baudrate tty" and "tty baudrate" */ |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 210 | op->tty = argv[0]; /* tty name */ |
| 211 | ts = argv[1]; /* baud rate(s) */ |
Denis Vlasenko | 9af7c9d | 2007-01-19 21:19:35 +0000 | [diff] [blame] | 212 | if (isdigit(argv[0][0])) { |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 213 | /* a number first, assume it's a speed (BSD style) */ |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 214 | op->tty = ts; /* tty name is in argv[1] */ |
| 215 | ts = argv[0]; /* baud rate(s) */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 216 | } |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 217 | parse_speeds(op, ts); |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 218 | |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 219 | // TODO: if applet_name is set to "getty: TTY", bb_error_msg's get simpler! |
| 220 | // grep for "%s:" |
| 221 | |
Denis Vlasenko | 50e77e1 | 2006-10-23 02:11:22 +0000 | [diff] [blame] | 222 | if (argv[2]) |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 223 | xsetenv("TERM", argv[2]); |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 224 | |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 225 | debug("exiting parse_args\n"); |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 226 | } |
| 227 | |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 228 | /* open_tty - set up tty as standard { input, output, error } */ |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 229 | static void open_tty(const char *tty) |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 230 | { |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 231 | /* Set up new standard input, unless we are given an already opened port. */ |
Denis Vlasenko | 9f73944 | 2006-12-16 23:49:13 +0000 | [diff] [blame] | 232 | if (NOT_LONE_DASH(tty)) { |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 233 | // struct stat st; |
| 234 | // int cur_dir_fd; |
| 235 | // int fd; |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 236 | |
| 237 | /* Sanity checks... */ |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 238 | // cur_dir_fd = xopen(".", O_DIRECTORY | O_NONBLOCK); |
| 239 | // xchdir("/dev"); |
| 240 | // xstat(tty, &st); |
| 241 | // if ((st.st_mode & S_IFMT) != S_IFCHR) |
| 242 | // bb_error_msg_and_die("%s: not a character device", tty); |
| 243 | |
| 244 | if (tty[0] != '/') |
| 245 | tty = xasprintf("/dev/%s", tty); /* will leak it */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 246 | |
| 247 | /* Open the tty as standard input. */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 248 | debug("open(2)\n"); |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 249 | close(0); |
| 250 | /*fd =*/ xopen(tty, O_RDWR | O_NONBLOCK); /* uses fd 0 */ |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 251 | |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 252 | // /* Restore current directory */ |
| 253 | // fchdir(cur_dir_fd); |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 254 | |
| 255 | /* Open the tty as standard input, continued */ |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 256 | // xmove_fd(fd, 0); |
| 257 | // /* fd is >= cur_dir_fd, and cur_dir_fd gets closed too here: */ |
| 258 | // while (fd > 2) |
| 259 | // close(fd--); |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 260 | |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 261 | /* Set proper protections and ownership. */ |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 262 | fchown(0, 0, 0); /* 0:0 */ |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 263 | fchmod(0, 0620); /* crw--w---- */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 264 | } else { |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 265 | /* |
| 266 | * Standard input should already be connected to an open port. Make |
| 267 | * sure it is open for read/write. |
| 268 | */ |
Denis Vlasenko | d37f222 | 2007-08-19 13:42:08 +0000 | [diff] [blame] | 269 | if ((fcntl(0, F_GETFL) & O_RDWR) != O_RDWR) |
Denis Vlasenko | e06bed3 | 2007-01-27 22:21:12 +0000 | [diff] [blame] | 270 | bb_error_msg_and_die("stdin is not open for read/write"); |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 271 | } |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 272 | } |
| 273 | |
Denis Vlasenko | 6476cc1 | 2006-11-07 01:52:10 +0000 | [diff] [blame] | 274 | /* termios_init - initialize termios settings */ |
| 275 | static void termios_init(struct termios *tp, int speed, struct options *op) |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 276 | { |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 277 | /* |
Denis Vlasenko | 6476cc1 | 2006-11-07 01:52:10 +0000 | [diff] [blame] | 278 | * Initial termios settings: 8-bit characters, raw-mode, blocking i/o. |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 279 | * Special characters are set after we have read the login name; all |
| 280 | * reads will be done in raw mode anyway. Errors will be dealt with |
Denis Vlasenko | 4e70bf4 | 2006-10-23 10:17:34 +0000 | [diff] [blame] | 281 | * later on. |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 282 | */ |
| 283 | #ifdef __linux__ |
| 284 | /* flush input and output queues, important for modems! */ |
Denis Vlasenko | 50e77e1 | 2006-10-23 02:11:22 +0000 | [diff] [blame] | 285 | ioctl(0, TCFLSH, TCIOFLUSH); |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 286 | #endif |
| 287 | |
| 288 | tp->c_cflag = CS8 | HUPCL | CREAD | speed; |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 289 | if (op->flags & F_LOCAL) |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 290 | tp->c_cflag |= CLOCAL; |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 291 | |
Rob Landley | f78ab53 | 2006-08-24 20:00:44 +0000 | [diff] [blame] | 292 | tp->c_iflag = tp->c_lflag = tp->c_line = 0; |
| 293 | tp->c_oflag = OPOST | ONLCR; |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 294 | tp->c_cc[VMIN] = 1; |
| 295 | tp->c_cc[VTIME] = 0; |
| 296 | |
| 297 | /* Optionally enable hardware flow control */ |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 298 | #ifdef CRTSCTS |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 299 | if (op->flags & F_RTSCTS) |
| 300 | tp->c_cflag |= CRTSCTS; |
| 301 | #endif |
| 302 | |
Denis Vlasenko | 6476cc1 | 2006-11-07 01:52:10 +0000 | [diff] [blame] | 303 | ioctl(0, TCSETS, tp); |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 304 | |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 305 | debug("term_io 2\n"); |
| 306 | } |
| 307 | |
| 308 | /* auto_baud - extract baud rate from modem status message */ |
Denis Vlasenko | 6476cc1 | 2006-11-07 01:52:10 +0000 | [diff] [blame] | 309 | static void auto_baud(char *buf, unsigned size_buf, struct termios *tp) |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 310 | { |
| 311 | int speed; |
| 312 | int vmin; |
| 313 | unsigned iflag; |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 314 | char *bp; |
| 315 | int nread; |
| 316 | |
| 317 | /* |
| 318 | * This works only if the modem produces its status code AFTER raising |
| 319 | * the DCD line, and if the computer is fast enough to set the proper |
| 320 | * baud rate before the message has gone by. We expect a message of the |
| 321 | * following format: |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 322 | * |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 323 | * <junk><number><junk> |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 324 | * |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 325 | * The number is interpreted as the baud rate of the incoming call. If the |
| 326 | * modem does not tell us the baud rate within one second, we will keep |
| 327 | * using the current baud rate. It is advisable to enable BREAK |
| 328 | * processing (comma-separated list of baud rates) if the processing of |
| 329 | * modem status messages is enabled. |
| 330 | */ |
| 331 | |
| 332 | /* |
| 333 | * Use 7-bit characters, don't block if input queue is empty. Errors will |
Denis Vlasenko | 4e70bf4 | 2006-10-23 10:17:34 +0000 | [diff] [blame] | 334 | * be dealt with later on. |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 335 | */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 336 | iflag = tp->c_iflag; |
"Vladimir N. Oleynik" | 3e245c9 | 2005-09-29 11:31:26 +0000 | [diff] [blame] | 337 | tp->c_iflag |= ISTRIP; /* enable 8th-bit stripping */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 338 | vmin = tp->c_cc[VMIN]; |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 339 | tp->c_cc[VMIN] = 0; /* don't block if queue empty */ |
Denis Vlasenko | 6476cc1 | 2006-11-07 01:52:10 +0000 | [diff] [blame] | 340 | ioctl(0, TCSETS, tp); |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 341 | |
| 342 | /* |
| 343 | * Wait for a while, then read everything the modem has said so far and |
| 344 | * try to extract the speed of the dial-in call. |
| 345 | */ |
Denis Vlasenko | 50e77e1 | 2006-10-23 02:11:22 +0000 | [diff] [blame] | 346 | sleep(1); |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 347 | nread = safe_read(0, buf, size_buf - 1); |
Denis Vlasenko | dce3fde | 2006-10-23 02:10:45 +0000 | [diff] [blame] | 348 | if (nread > 0) { |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 349 | buf[nread] = '\0'; |
| 350 | for (bp = buf; bp < buf + nread; bp++) { |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 351 | if (isdigit(*bp)) { |
Denis Vlasenko | 1385899 | 2006-10-08 12:49:22 +0000 | [diff] [blame] | 352 | speed = bcode(bp); |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 353 | if (speed > 0) { |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 354 | tp->c_cflag &= ~CBAUD; |
| 355 | tp->c_cflag |= speed; |
| 356 | } |
| 357 | break; |
| 358 | } |
| 359 | } |
| 360 | } |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 361 | |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 362 | /* Restore terminal settings. Errors will be dealt with later on. */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 363 | tp->c_iflag = iflag; |
| 364 | tp->c_cc[VMIN] = vmin; |
Denis Vlasenko | 6476cc1 | 2006-11-07 01:52:10 +0000 | [diff] [blame] | 365 | ioctl(0, TCSETS, tp); |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 366 | } |
| 367 | |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 368 | /* do_prompt - show login prompt, optionally preceded by /etc/issue contents */ |
Denis Vlasenko | 68404f1 | 2008-03-17 09:00:54 +0000 | [diff] [blame] | 369 | static void do_prompt(struct options *op) |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 370 | { |
Denis Vlasenko | 4e70bf4 | 2006-10-23 10:17:34 +0000 | [diff] [blame] | 371 | #ifdef ISSUE |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 372 | print_login_issue(op->issue, op->tty); |
| 373 | #endif |
| 374 | print_login_prompt(); |
| 375 | } |
| 376 | |
Denis Vlasenko | 4e70bf4 | 2006-10-23 10:17:34 +0000 | [diff] [blame] | 377 | #ifdef HANDLE_ALLCAPS |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 378 | /* all_is_upcase - string contains upper case without lower case */ |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 379 | /* returns 1 if true, 0 if false */ |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 380 | static int all_is_upcase(const char *s) |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 381 | { |
Denis Vlasenko | dce3fde | 2006-10-23 02:10:45 +0000 | [diff] [blame] | 382 | while (*s) |
| 383 | if (islower(*s++)) |
| 384 | return 0; |
| 385 | return 1; |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 386 | } |
Denis Vlasenko | 4e70bf4 | 2006-10-23 10:17:34 +0000 | [diff] [blame] | 387 | #endif |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 388 | |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 389 | /* get_logname - get user name, establish parity, speed, erase, kill, eol; |
| 390 | * return NULL on BREAK, logname on success */ |
Denis Vlasenko | 703aa13 | 2006-10-23 22:43:02 +0000 | [diff] [blame] | 391 | static char *get_logname(char *logname, unsigned size_logname, |
Denis Vlasenko | 68404f1 | 2008-03-17 09:00:54 +0000 | [diff] [blame] | 392 | struct options *op, struct chardata *cp) |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 393 | { |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 394 | char *bp; |
"Vladimir N. Oleynik" | 6f347ef | 2005-10-15 10:23:55 +0000 | [diff] [blame] | 395 | char c; /* input character, full eight bits */ |
| 396 | char ascval; /* low 7 bits of input character */ |
| 397 | int bits; /* # of "1" bits per character */ |
| 398 | int mask; /* mask with 1 bit up */ |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 399 | static const char erase[][3] = {/* backspace-space-backspace */ |
"Vladimir N. Oleynik" | 3e245c9 | 2005-09-29 11:31:26 +0000 | [diff] [blame] | 400 | "\010\040\010", /* space parity */ |
| 401 | "\010\040\010", /* odd parity */ |
| 402 | "\210\240\210", /* even parity */ |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 403 | "\010\040\010", /* 8 bit no parity */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 404 | }; |
| 405 | |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 406 | /* NB: *cp is pre-initialized with init_chardata */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 407 | |
| 408 | /* Flush pending input (esp. after parsing or switching the baud rate). */ |
Denis Vlasenko | 50e77e1 | 2006-10-23 02:11:22 +0000 | [diff] [blame] | 409 | sleep(1); |
| 410 | ioctl(0, TCFLSH, TCIFLUSH); |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 411 | |
| 412 | /* Prompt for and read a login name. */ |
Denis Vlasenko | 703aa13 | 2006-10-23 22:43:02 +0000 | [diff] [blame] | 413 | logname[0] = '\0'; |
| 414 | while (!logname[0]) { |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 415 | /* Write issue file and prompt, with "parity" bit == 0. */ |
Denis Vlasenko | 68404f1 | 2008-03-17 09:00:54 +0000 | [diff] [blame] | 416 | do_prompt(op); |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 417 | |
| 418 | /* Read name, watch for break, parity, erase, kill, end-of-line. */ |
Denis Vlasenko | dce3fde | 2006-10-23 02:10:45 +0000 | [diff] [blame] | 419 | bp = logname; |
Denis Vlasenko | 703aa13 | 2006-10-23 22:43:02 +0000 | [diff] [blame] | 420 | cp->eol = '\0'; |
| 421 | while (cp->eol == '\0') { |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 422 | |
| 423 | /* Do not report trivial EINTR/EIO errors. */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 424 | if (read(0, &c, 1) < 1) { |
| 425 | if (errno == EINTR || errno == EIO) |
| 426 | exit(0); |
Denis Vlasenko | a980165 | 2006-09-07 16:20:03 +0000 | [diff] [blame] | 427 | bb_perror_msg_and_die("%s: read", op->tty); |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 428 | } |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 429 | |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 430 | /* BREAK. If we have speeds to try, |
| 431 | * return NULL (will switch speeds and return here) */ |
Denis Vlasenko | 703aa13 | 2006-10-23 22:43:02 +0000 | [diff] [blame] | 432 | if (c == '\0' && op->numspeed > 1) |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 433 | return NULL; |
| 434 | |
| 435 | /* Do parity bit handling. */ |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 436 | if (!(op->flags & F_LOCAL) && (c & 0x80)) { /* "parity" bit on? */ |
Denis Vlasenko | 703aa13 | 2006-10-23 22:43:02 +0000 | [diff] [blame] | 437 | bits = 1; |
| 438 | mask = 1; |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 439 | while (mask & 0x7f) { |
| 440 | if (mask & c) |
"Vladimir N. Oleynik" | 3e245c9 | 2005-09-29 11:31:26 +0000 | [diff] [blame] | 441 | bits++; /* count "1" bits */ |
Denis Vlasenko | 703aa13 | 2006-10-23 22:43:02 +0000 | [diff] [blame] | 442 | mask <<= 1; |
| 443 | } |
Denis Vlasenko | 4e70bf4 | 2006-10-23 10:17:34 +0000 | [diff] [blame] | 444 | /* ... |= 2 - even, 1 - odd */ |
| 445 | cp->parity |= 2 - (bits & 1); |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 446 | } |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 447 | |
Denis Vlasenko | 703aa13 | 2006-10-23 22:43:02 +0000 | [diff] [blame] | 448 | /* Do erase, kill and end-of-line processing. */ |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 449 | ascval = c & 0x7f; |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 450 | switch (ascval) { |
| 451 | case CR: |
| 452 | case NL: |
Denis Vlasenko | 703aa13 | 2006-10-23 22:43:02 +0000 | [diff] [blame] | 453 | *bp = '\0'; /* terminate logname */ |
"Vladimir N. Oleynik" | 3e245c9 | 2005-09-29 11:31:26 +0000 | [diff] [blame] | 454 | cp->eol = ascval; /* set end-of-line char */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 455 | break; |
| 456 | case BS: |
| 457 | case DEL: |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 458 | #ifdef ANCIENT_BS_KILL_CHARS |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 459 | case '#': |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 460 | #endif |
"Vladimir N. Oleynik" | 3e245c9 | 2005-09-29 11:31:26 +0000 | [diff] [blame] | 461 | cp->erase = ascval; /* set erase character */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 462 | if (bp > logname) { |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 463 | full_write(1, erase[cp->parity], 3); |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 464 | bp--; |
| 465 | } |
| 466 | break; |
| 467 | case CTL('U'): |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 468 | #ifdef ANCIENT_BS_KILL_CHARS |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 469 | case '@': |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 470 | #endif |
"Vladimir N. Oleynik" | 3e245c9 | 2005-09-29 11:31:26 +0000 | [diff] [blame] | 471 | cp->kill = ascval; /* set kill character */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 472 | while (bp > logname) { |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 473 | full_write(1, erase[cp->parity], 3); |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 474 | bp--; |
| 475 | } |
| 476 | break; |
| 477 | case CTL('D'): |
| 478 | exit(0); |
| 479 | default: |
| 480 | if (!isascii(ascval) || !isprint(ascval)) { |
Denis Vlasenko | 703aa13 | 2006-10-23 22:43:02 +0000 | [diff] [blame] | 481 | /* ignore garbage characters */ |
| 482 | } else if (bp - logname >= size_logname - 1) { |
Denis Vlasenko | a980165 | 2006-09-07 16:20:03 +0000 | [diff] [blame] | 483 | bb_error_msg_and_die("%s: input overrun", op->tty); |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 484 | } else { |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 485 | full_write(1, &c, 1); /* echo the character */ |
"Vladimir N. Oleynik" | 3e245c9 | 2005-09-29 11:31:26 +0000 | [diff] [blame] | 486 | *bp++ = ascval; /* and store it */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 487 | } |
| 488 | break; |
| 489 | } |
| 490 | } |
| 491 | } |
| 492 | /* Handle names with upper case and no lower case. */ |
| 493 | |
Denis Vlasenko | 4e70bf4 | 2006-10-23 10:17:34 +0000 | [diff] [blame] | 494 | #ifdef HANDLE_ALLCAPS |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 495 | cp->capslock = all_is_upcase(logname); |
Denis Vlasenko | dce3fde | 2006-10-23 02:10:45 +0000 | [diff] [blame] | 496 | if (cp->capslock) { |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 497 | for (bp = logname; *bp; bp++) |
| 498 | if (isupper(*bp)) |
"Vladimir N. Oleynik" | 3e245c9 | 2005-09-29 11:31:26 +0000 | [diff] [blame] | 499 | *bp = tolower(*bp); /* map name to lower case */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 500 | } |
Denis Vlasenko | 4e70bf4 | 2006-10-23 10:17:34 +0000 | [diff] [blame] | 501 | #endif |
Denis Vlasenko | dce3fde | 2006-10-23 02:10:45 +0000 | [diff] [blame] | 502 | return logname; |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 503 | } |
| 504 | |
Denis Vlasenko | 6476cc1 | 2006-11-07 01:52:10 +0000 | [diff] [blame] | 505 | /* termios_final - set the final tty mode bits */ |
| 506 | static void termios_final(struct options *op, struct termios *tp, struct chardata *cp) |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 507 | { |
| 508 | /* General terminal-independent stuff. */ |
"Vladimir N. Oleynik" | 3e245c9 | 2005-09-29 11:31:26 +0000 | [diff] [blame] | 509 | tp->c_iflag |= IXON | IXOFF; /* 2-way flow control */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 510 | tp->c_lflag |= ICANON | ISIG | ECHO | ECHOE | ECHOK | ECHOKE; |
| 511 | /* no longer| ECHOCTL | ECHOPRT */ |
| 512 | tp->c_oflag |= OPOST; |
| 513 | /* tp->c_cflag = 0; */ |
"Vladimir N. Oleynik" | 3e245c9 | 2005-09-29 11:31:26 +0000 | [diff] [blame] | 514 | tp->c_cc[VINTR] = DEF_INTR; /* default interrupt */ |
| 515 | tp->c_cc[VQUIT] = DEF_QUIT; /* default quit */ |
| 516 | tp->c_cc[VEOF] = DEF_EOF; /* default EOF character */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 517 | tp->c_cc[VEOL] = DEF_EOL; |
"Vladimir N. Oleynik" | 3e245c9 | 2005-09-29 11:31:26 +0000 | [diff] [blame] | 518 | tp->c_cc[VSWTC] = DEF_SWITCH; /* default switch character */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 519 | |
| 520 | /* Account for special characters seen in input. */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 521 | if (cp->eol == CR) { |
"Vladimir N. Oleynik" | 3e245c9 | 2005-09-29 11:31:26 +0000 | [diff] [blame] | 522 | tp->c_iflag |= ICRNL; /* map CR in input to NL */ |
| 523 | tp->c_oflag |= ONLCR; /* map NL in output to CR-NL */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 524 | } |
"Vladimir N. Oleynik" | 3e245c9 | 2005-09-29 11:31:26 +0000 | [diff] [blame] | 525 | tp->c_cc[VERASE] = cp->erase; /* set erase character */ |
| 526 | tp->c_cc[VKILL] = cp->kill; /* set kill character */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 527 | |
| 528 | /* Account for the presence or absence of parity bits in input. */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 529 | switch (cp->parity) { |
"Vladimir N. Oleynik" | 3e245c9 | 2005-09-29 11:31:26 +0000 | [diff] [blame] | 530 | case 0: /* space (always 0) parity */ |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 531 | // I bet most people go here - they use only 7-bit chars in usernames.... |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 532 | break; |
"Vladimir N. Oleynik" | 3e245c9 | 2005-09-29 11:31:26 +0000 | [diff] [blame] | 533 | case 1: /* odd parity */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 534 | tp->c_cflag |= PARODD; |
| 535 | /* FALLTHROUGH */ |
"Vladimir N. Oleynik" | 3e245c9 | 2005-09-29 11:31:26 +0000 | [diff] [blame] | 536 | case 2: /* even parity */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 537 | tp->c_cflag |= PARENB; |
| 538 | tp->c_iflag |= INPCK | ISTRIP; |
| 539 | /* FALLTHROUGH */ |
"Vladimir N. Oleynik" | 3e245c9 | 2005-09-29 11:31:26 +0000 | [diff] [blame] | 540 | case (1 | 2): /* no parity bit */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 541 | tp->c_cflag &= ~CSIZE; |
| 542 | tp->c_cflag |= CS7; |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 543 | // FIXME: wtf? case 3: we saw both even and odd 8-bit bytes - |
| 544 | // it's probably some umlauts etc, but definitely NOT 7-bit!!! |
| 545 | // Entire parity detection madness here just begs for deletion... |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 546 | break; |
| 547 | } |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 548 | |
Denis Vlasenko | e06bed3 | 2007-01-27 22:21:12 +0000 | [diff] [blame] | 549 | /* Account for upper case without lower case. */ |
Denis Vlasenko | 4e70bf4 | 2006-10-23 10:17:34 +0000 | [diff] [blame] | 550 | #ifdef HANDLE_ALLCAPS |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 551 | if (cp->capslock) { |
| 552 | tp->c_iflag |= IUCLC; |
| 553 | tp->c_lflag |= XCASE; |
| 554 | tp->c_oflag |= OLCUC; |
| 555 | } |
Denis Vlasenko | 4e70bf4 | 2006-10-23 10:17:34 +0000 | [diff] [blame] | 556 | #endif |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 557 | /* Optionally enable hardware flow control */ |
"Vladimir N. Oleynik" | 3e245c9 | 2005-09-29 11:31:26 +0000 | [diff] [blame] | 558 | #ifdef CRTSCTS |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 559 | if (op->flags & F_RTSCTS) |
| 560 | tp->c_cflag |= CRTSCTS; |
| 561 | #endif |
| 562 | |
| 563 | /* Finally, make the new settings effective */ |
Denis Vlasenko | fb79a2e | 2007-07-14 22:07:14 +0000 | [diff] [blame] | 564 | ioctl_or_perror_and_die(0, TCSETS, tp, "%s: TCSETS", op->tty); |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 565 | } |
| 566 | |
Denis Vlasenko | 6476cc1 | 2006-11-07 01:52:10 +0000 | [diff] [blame] | 567 | #if ENABLE_FEATURE_UTMP |
Denis Vlasenko | f3fca91 | 2007-12-04 18:46:01 +0000 | [diff] [blame] | 568 | static void touch(const char *filename) |
| 569 | { |
| 570 | if (access(filename, R_OK | W_OK) == -1) |
| 571 | close(open(filename, O_WRONLY | O_CREAT, 0664)); |
| 572 | } |
| 573 | |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 574 | /* update_utmp - update our utmp entry */ |
Denis Vlasenko | f3fca91 | 2007-12-04 18:46:01 +0000 | [diff] [blame] | 575 | static void update_utmp(const char *line, char *fakehost) |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 576 | { |
| 577 | struct utmp ut; |
| 578 | struct utmp *utp; |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 579 | int mypid = getpid(); |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 580 | |
Denis Vlasenko | f3fca91 | 2007-12-04 18:46:01 +0000 | [diff] [blame] | 581 | /* In case we won't find an entry below... */ |
| 582 | memset(&ut, 0, sizeof(ut)); |
| 583 | safe_strncpy(ut.ut_id, line + 3, sizeof(ut.ut_id)); |
| 584 | |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 585 | /* |
| 586 | * The utmp file holds miscellaneous information about things started by |
| 587 | * /sbin/init and other system-related events. Our purpose is to update |
| 588 | * the utmp entry for the current process, in particular the process type |
| 589 | * and the tty line we are listening to. Return successfully only if the |
| 590 | * utmp file can be opened for update, and if we are able to find our |
| 591 | * entry in the utmp file. |
| 592 | */ |
Denis Vlasenko | f3fca91 | 2007-12-04 18:46:01 +0000 | [diff] [blame] | 593 | touch(_PATH_UTMP); |
| 594 | |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 595 | utmpname(_PATH_UTMP); |
| 596 | setutent(); |
Denis Vlasenko | f3fca91 | 2007-12-04 18:46:01 +0000 | [diff] [blame] | 597 | while ((utp = getutent()) != NULL) { |
| 598 | if (utp->ut_type == INIT_PROCESS && utp->ut_pid == mypid) { |
| 599 | memcpy(&ut, utp, sizeof(ut)); |
| 600 | break; |
| 601 | } |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 602 | } |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 603 | |
Rob Landley | cf7577d | 2006-06-25 22:59:31 +0000 | [diff] [blame] | 604 | strcpy(ut.ut_user, "LOGIN"); |
| 605 | safe_strncpy(ut.ut_line, line, sizeof(ut.ut_line)); |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 606 | if (fakehost) |
Rob Landley | cf7577d | 2006-06-25 22:59:31 +0000 | [diff] [blame] | 607 | safe_strncpy(ut.ut_host, fakehost, sizeof(ut.ut_host)); |
Denis Vlasenko | f3fca91 | 2007-12-04 18:46:01 +0000 | [diff] [blame] | 608 | ut.ut_time = time(NULL); |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 609 | ut.ut_type = LOGIN_PROCESS; |
| 610 | ut.ut_pid = mypid; |
| 611 | |
| 612 | pututline(&ut); |
| 613 | endutent(); |
| 614 | |
Denis Vlasenko | 6476cc1 | 2006-11-07 01:52:10 +0000 | [diff] [blame] | 615 | #if ENABLE_FEATURE_WTMP |
Denis Vlasenko | f3fca91 | 2007-12-04 18:46:01 +0000 | [diff] [blame] | 616 | touch(bb_path_wtmp_file); |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 617 | updwtmp(bb_path_wtmp_file, &ut); |
| 618 | #endif |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 619 | } |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 620 | #endif /* CONFIG_FEATURE_UTMP */ |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 621 | |
Denis Vlasenko | 9b49a5e | 2007-10-11 10:05:36 +0000 | [diff] [blame] | 622 | int getty_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
Denis Vlasenko | 68404f1 | 2008-03-17 09:00:54 +0000 | [diff] [blame] | 623 | int getty_main(int argc ATTRIBUTE_UNUSED, char **argv) |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 624 | { |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 625 | int n; |
Denis Vlasenko | f3fca91 | 2007-12-04 18:46:01 +0000 | [diff] [blame] | 626 | char *fakehost = NULL; /* Fake hostname for ut_host */ |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 627 | char *logname; /* login name, given to /bin/login */ |
Denis Vlasenko | 6476cc1 | 2006-11-07 01:52:10 +0000 | [diff] [blame] | 628 | /* Merging these into "struct local" may _seem_ to reduce |
| 629 | * parameter passing, but today's gcc will inline |
| 630 | * statics which are called once anyway, so don't do that */ |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 631 | struct chardata chardata; /* set by get_logname() */ |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 632 | struct termios termios; /* terminal mode bits */ |
| 633 | struct options options; |
| 634 | |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 635 | chardata = init_chardata; |
| 636 | |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 637 | memset(&options, 0, sizeof(options)); |
| 638 | options.login = _PATH_LOGIN; /* default login program */ |
| 639 | options.tty = "tty1"; /* default tty line */ |
| 640 | options.initstring = ""; /* modem init string */ |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 641 | #ifdef ISSUE |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 642 | options.issue = ISSUE; /* default issue file */ |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 643 | #endif |
"Vladimir N. Oleynik" | 3e245c9 | 2005-09-29 11:31:26 +0000 | [diff] [blame] | 644 | |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 645 | /* Parse command-line arguments. */ |
| 646 | parse_args(argv, &options, &fakehost); |
| 647 | |
Denis Vlasenko | dce3fde | 2006-10-23 02:10:45 +0000 | [diff] [blame] | 648 | logmode = LOGMODE_NONE; |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 649 | |
| 650 | /* Create new session, lose controlling tty, if any */ |
| 651 | /* docs/ctty.htm says: |
| 652 | * "This is allowed only when the current process |
| 653 | * is not a process group leader" - is this a problem? */ |
Denis Vlasenko | a980165 | 2006-09-07 16:20:03 +0000 | [diff] [blame] | 654 | setsid(); |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 655 | /* close stdio, and stray descriptors, just in case */ |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 656 | n = xopen(bb_dev_null, O_RDWR); |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 657 | /* dup2(n, 0); - no, we need to handle "getty - 9600" too */ |
| 658 | xdup2(n, 1); |
| 659 | xdup2(n, 2); |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 660 | while (n > 2) |
| 661 | close(n--); |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 662 | |
| 663 | /* Logging. We want special flavor of error_msg_and_die */ |
Denis Vlasenko | dce3fde | 2006-10-23 02:10:45 +0000 | [diff] [blame] | 664 | die_sleep = 10; |
| 665 | msg_eol = "\r\n"; |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 666 | /* most likely will internally use fd #3 in CLOEXEC mode: */ |
Denis Vlasenko | 8f8f268 | 2006-10-03 21:00:43 +0000 | [diff] [blame] | 667 | openlog(applet_name, LOG_PID, LOG_AUTH); |
Denis Vlasenko | a980165 | 2006-09-07 16:20:03 +0000 | [diff] [blame] | 668 | logmode = LOGMODE_BOTH; |
| 669 | |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 670 | #ifdef DEBUGGING |
Rob Landley | d921b2e | 2006-08-03 15:41:12 +0000 | [diff] [blame] | 671 | dbf = xfopen(DEBUGTERM, "w"); |
Denis Vlasenko | 68404f1 | 2008-03-17 09:00:54 +0000 | [diff] [blame] | 672 | for (n = 1; argv[n]; n++) { |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 673 | debug(argv[n]); |
| 674 | debug("\n"); |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 675 | } |
| 676 | #endif |
"Vladimir N. Oleynik" | 3e245c9 | 2005-09-29 11:31:26 +0000 | [diff] [blame] | 677 | |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 678 | /* Open the tty as standard input, if it is not "-" */ |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 679 | /* If it's not "-" and not taken yet, it will become our ctty */ |
| 680 | debug("calling open_tty\n"); |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 681 | open_tty(options.tty); |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 682 | ndelay_off(0); |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 683 | debug("duping\n"); |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 684 | xdup2(0, 1); |
| 685 | xdup2(0, 2); |
| 686 | |
| 687 | /* |
| 688 | * The following ioctl will fail if stdin is not a tty, but also when |
| 689 | * there is noise on the modem control lines. In the latter case, the |
| 690 | * common course of action is (1) fix your cables (2) give the modem more |
| 691 | * time to properly reset after hanging up. SunOS users can achieve (2) |
| 692 | * by patching the SunOS kernel variable "zsadtrlow" to a larger value; |
| 693 | * 5 seconds seems to be a good value. |
| 694 | */ |
| 695 | ioctl_or_perror_and_die(0, TCGETS, &termios, "%s: TCGETS", options.tty); |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 696 | |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 697 | #ifdef __linux__ |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 698 | // FIXME: do we need this? Otherwise "-" case seems to be broken... |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 699 | // /* Forcibly make fd 0 our controlling tty, even if another session |
| 700 | // * has it as a ctty. (Another session loses ctty). */ |
| 701 | // ioctl(0, TIOCSCTTY, (void*)1); |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 702 | /* Make ourself a foreground process group within our session */ |
| 703 | tcsetpgrp(0, getpid()); |
| 704 | #endif |
| 705 | |
| 706 | #if ENABLE_FEATURE_UTMP |
| 707 | /* Update the utmp file. This tty is ours now! */ |
| 708 | update_utmp(options.tty, fakehost); |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 709 | #endif |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 710 | |
Denis Vlasenko | 6476cc1 | 2006-11-07 01:52:10 +0000 | [diff] [blame] | 711 | /* Initialize the termios settings (raw mode, eight-bit, blocking i/o). */ |
| 712 | debug("calling termios_init\n"); |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 713 | termios_init(&termios, options.speeds[0], &options); |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 714 | |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 715 | /* Write the modem init string and DON'T flush the buffers */ |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 716 | if (options.flags & F_INITSTRING) { |
| 717 | debug("writing init string\n"); |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 718 | full_write(1, options.initstring, strlen(options.initstring)); |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 719 | } |
| 720 | |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 721 | /* Optionally detect the baud rate from the modem status message */ |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 722 | debug("before autobaud\n"); |
| 723 | if (options.flags & F_PARSE) |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 724 | auto_baud(line_buf, sizeof(line_buf), &termios); |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 725 | |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 726 | /* Set the optional timer */ |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 727 | alarm(options.timeout); /* if 0, alarm is not set */ |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 728 | |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 729 | /* Optionally wait for CR or LF before writing /etc/issue */ |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 730 | if (options.flags & F_WAITCRLF) { |
| 731 | char ch; |
| 732 | |
| 733 | debug("waiting for cr-lf\n"); |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 734 | while (safe_read(0, &ch, 1) == 1) { |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 735 | debug("read %x\n", (unsigned char)ch); |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 736 | ch &= 0x7f; /* strip "parity bit" */ |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 737 | if (ch == '\n' || ch == '\r') |
| 738 | break; |
| 739 | } |
| 740 | } |
| 741 | |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 742 | logname = NULL; |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 743 | if (!(options.flags & F_NOPROMPT)) { |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 744 | /* NB:termios_init already set line speed |
| 745 | * to options.speeds[0] */ |
| 746 | int baud_index = 0; |
| 747 | |
| 748 | while (1) { |
| 749 | /* Read the login name. */ |
| 750 | debug("reading login name\n"); |
| 751 | logname = get_logname(line_buf, sizeof(line_buf), |
Denis Vlasenko | 68404f1 | 2008-03-17 09:00:54 +0000 | [diff] [blame] | 752 | &options, &chardata); |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 753 | if (logname) |
| 754 | break; |
| 755 | /* we are here only if options.numspeed > 1 */ |
| 756 | baud_index = (baud_index + 1) % options.numspeed; |
| 757 | termios.c_cflag &= ~CBAUD; |
| 758 | termios.c_cflag |= options.speeds[baud_index]; |
| 759 | ioctl(0, TCSETS, &termios); |
| 760 | } |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 761 | } |
| 762 | |
| 763 | /* Disable timer. */ |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 764 | alarm(0); |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 765 | |
Denis Vlasenko | 6476cc1 | 2006-11-07 01:52:10 +0000 | [diff] [blame] | 766 | /* Finalize the termios settings. */ |
Denis Vlasenko | 6476cc1 | 2006-11-07 01:52:10 +0000 | [diff] [blame] | 767 | termios_final(&options, &termios, &chardata); |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 768 | |
| 769 | /* Now the newline character should be properly written. */ |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 770 | full_write(1, "\n", 1); |
Bernhard Reutner-Fischer | 6d82f94 | 2006-06-16 16:37:07 +0000 | [diff] [blame] | 771 | |
| 772 | /* Let the login program take care of password validation. */ |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 773 | /* We use PATH because we trust that root doesn't set "bad" PATH, |
| 774 | * and getty is not suid-root applet. */ |
Denis Vlasenko | 397de61 | 2008-03-17 08:55:44 +0000 | [diff] [blame] | 775 | /* With -n, logname == NULL, and login will ask for username instead */ |
Denis Vlasenko | d0bbbdc | 2007-12-04 09:48:40 +0000 | [diff] [blame] | 776 | BB_EXECLP(options.login, options.login, "--", logname, NULL); |
Denis Vlasenko | a980165 | 2006-09-07 16:20:03 +0000 | [diff] [blame] | 777 | bb_error_msg_and_die("%s: can't exec %s", options.tty, options.login); |
Robert Griebl | 1fca558 | 2002-06-04 20:45:46 +0000 | [diff] [blame] | 778 | } |