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Commit | Line | Data |
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b75c8134 | 1 | /* |
53d55042 SK |
2 | * Alternate Getty (agetty) 'agetty' is a versatile, portable, easy to use |
3 | * replacement for getty on SunOS 4.1.x or the SAC ttymon/ttyadm/sacadm/pmadm | |
4 | * suite on Solaris and other SVR4 systems. 'agetty' was written by Wietse | |
5 | * Venema, enhanced by John DiMarco, and further enhanced by Dennis Cronin. | |
b75c8134 KZ |
6 | * |
7 | * Ported to Linux by Peter Orbaek <poe@daimi.aau.dk> | |
1683f6bf DWF |
8 | * Adopt the mingetty features for a better support |
9 | * of virtual consoles by Werner Fink <werner@suse.de> | |
b75c8134 | 10 | * |
53d55042 | 11 | * This program is freely distributable. |
b75c8134 | 12 | */ |
6dbe3af9 KZ |
13 | #include <stdio.h> |
14 | #include <unistd.h> | |
15 | #include <stdlib.h> | |
2b6fc908 | 16 | #include <string.h> |
1961482a | 17 | #include <termios.h> |
6dbe3af9 KZ |
18 | #include <signal.h> |
19 | #include <errno.h> | |
3aa6b68f | 20 | #include <sys/ioctl.h> |
6dbe3af9 KZ |
21 | #include <sys/types.h> |
22 | #include <sys/stat.h> | |
23 | #include <fcntl.h> | |
22853e4a | 24 | #include <stdarg.h> |
6dbe3af9 KZ |
25 | #include <ctype.h> |
26 | #include <utmp.h> | |
27 | #include <getopt.h> | |
22853e4a | 28 | #include <time.h> |
6dbe3af9 | 29 | #include <sys/file.h> |
e61e66bd | 30 | #include <sys/socket.h> |
729def03 | 31 | #include <langinfo.h> |
3aa6b68f | 32 | #include <grp.h> |
2b945eda KZ |
33 | #include <arpa/inet.h> |
34 | #include <netdb.h> | |
35 | #include <ifaddrs.h> | |
df73ad46 | 36 | |
8abcf290 | 37 | #include "strutils.h" |
e12c9866 | 38 | #include "all-io.h" |
7eda085c | 39 | #include "nls.h" |
e6590f06 | 40 | #include "pathnames.h" |
e5b17b31 | 41 | #include "c.h" |
1683f6bf | 42 | #include "widechar.h" |
879a7ab4 | 43 | #include "ttyutils.h" |
6dbe3af9 | 44 | |
fd6b7a7f | 45 | #ifdef __linux__ |
0da025da | 46 | # include <sys/kd.h> |
53d55042 SK |
47 | # include <sys/param.h> |
48 | # define USE_SYSLOG | |
729def03 WF |
49 | # ifndef DEFAULT_VCTERM |
50 | # define DEFAULT_VCTERM "linux" | |
51 | # endif | |
52 | # ifndef DEFAULT_STERM | |
53 | # define DEFAULT_STERM "vt102" | |
54 | # endif | |
4585ec0b ST |
55 | #elif defined(__GNU__) |
56 | # define USE_SYSLOG | |
57 | # ifndef DEFAULT_VCTERM | |
58 | # define DEFAULT_VCTERM "hurd" | |
59 | # endif | |
60 | # ifndef DEFAULT_STERM | |
61 | # define DEFAULT_STERM "vt102" | |
62 | # endif | |
729def03 WF |
63 | #else |
64 | # ifndef DEFAULT_VCTERM | |
65 | # define DEFAULT_VCTERM "vt100" | |
66 | # endif | |
67 | # ifndef DEFAULT_STERM | |
68 | # define DEFAULT_STERM "vt100" | |
69 | # endif | |
6dbe3af9 KZ |
70 | #endif |
71 | ||
53d55042 | 72 | /* If USE_SYSLOG is undefined all diagnostics go to /dev/console. */ |
6dbe3af9 | 73 | #ifdef USE_SYSLOG |
53d55042 | 74 | # include <syslog.h> |
6dbe3af9 KZ |
75 | #endif |
76 | ||
b75c8134 KZ |
77 | /* |
78 | * Some heuristics to find out what environment we are in: if it is not | |
53d55042 SK |
79 | * System V, assume it is SunOS 4. The LOGIN_PROCESS is defined in System V |
80 | * utmp.h, which will select System V style getty. | |
b75c8134 | 81 | */ |
53d55042 SK |
82 | #ifdef LOGIN_PROCESS |
83 | # define SYSV_STYLE | |
6dbe3af9 KZ |
84 | #endif |
85 | ||
b75c8134 KZ |
86 | /* |
87 | * Things you may want to modify. | |
88 | * | |
89 | * If ISSUE is not defined, agetty will never display the contents of the | |
90 | * /etc/issue file. You will not want to spit out large "issue" files at the | |
91 | * wrong baud rate. Relevant for System V only. | |
92 | * | |
93 | * You may disagree with the default line-editing etc. characters defined | |
94 | * below. Note, however, that DEL cannot be used for interrupt generation | |
95 | * and for line editing at the same time. | |
96 | */ | |
6dbe3af9 | 97 | |
53d55042 | 98 | /* Displayed before the login prompt. */ |
6dbe3af9 | 99 | #ifdef SYSV_STYLE |
96cc7b0b | 100 | # define ISSUE _PATH_ISSUE |
53d55042 | 101 | # include <sys/utsname.h> |
6dbe3af9 KZ |
102 | #endif |
103 | ||
53d55042 | 104 | /* Login prompt. */ |
e85281a8 | 105 | #define LOGIN "login: " |
9aeb66dc | 106 | #define LOGIN_ARGV_MAX 16 /* Numbers of args for login */ |
6dbe3af9 | 107 | |
b75c8134 KZ |
108 | /* |
109 | * When multiple baud rates are specified on the command line, the first one | |
110 | * we will try is the first one specified. | |
111 | */ | |
6dbe3af9 KZ |
112 | #define FIRST_SPEED 0 |
113 | ||
114 | /* Storage for command-line options. */ | |
53d55042 | 115 | #define MAX_SPEED 10 /* max. nr. of baud rates */ |
6dbe3af9 KZ |
116 | |
117 | struct options { | |
bde20e1b WF |
118 | int flags; /* toggle switches, see below */ |
119 | int timeout; /* time-out period */ | |
eb8e1f9f | 120 | char *autolog; /* login the user automatically */ |
e85281a8 DWF |
121 | char *chdir; /* Chdir before the login */ |
122 | char *chroot; /* Chroot before the login */ | |
bde20e1b | 123 | char *login; /* login program */ |
eb8e1f9f | 124 | char *logopt; /* options for login program */ |
bde20e1b | 125 | char *tty; /* name of tty */ |
729def03 WF |
126 | char *vcline; /* line of virtual console */ |
127 | char *term; /* terminal type */ | |
bde20e1b WF |
128 | char *initstring; /* modem init string */ |
129 | char *issue; /* alternative issue file */ | |
cb872ac9 KZ |
130 | char *erasechars; /* string with erase chars */ |
131 | char *killchars; /* string with kill chars */ | |
e85281a8 DWF |
132 | int delay; /* Sleep seconds before prompt */ |
133 | int nice; /* Run login with this priority */ | |
bde20e1b | 134 | int numspeed; /* number of baud rates to try */ |
ef264c83 | 135 | int clocal; /* CLOCAL_MODE_* */ |
bde20e1b | 136 | speed_t speeds[MAX_SPEED]; /* baud rates to be tried */ |
6dbe3af9 KZ |
137 | }; |
138 | ||
ef264c83 KZ |
139 | enum { |
140 | CLOCAL_MODE_AUTO = 0, | |
141 | CLOCAL_MODE_ALWAYS, | |
142 | CLOCAL_MODE_NEVER | |
143 | }; | |
144 | ||
53d55042 SK |
145 | #define F_PARSE (1<<0) /* process modem status messages */ |
146 | #define F_ISSUE (1<<1) /* display /etc/issue */ | |
147 | #define F_RTSCTS (1<<2) /* enable RTS/CTS flow control */ | |
ef264c83 | 148 | |
53d55042 SK |
149 | #define F_INITSTRING (1<<4) /* initstring is set */ |
150 | #define F_WAITCRLF (1<<5) /* wait for CR or LF */ | |
151 | #define F_CUSTISSUE (1<<6) /* give alternative issue file */ | |
152 | #define F_NOPROMPT (1<<7) /* do not ask for login name! */ | |
153 | #define F_LCUC (1<<8) /* support for *LCUC stty modes */ | |
154 | #define F_KEEPSPEED (1<<9) /* follow baud rate from kernel */ | |
155 | #define F_KEEPCFLAGS (1<<10) /* reuse c_cflags setup from kernel */ | |
bde20e1b | 156 | #define F_EIGHTBITS (1<<11) /* Assume 8bit-clean tty */ |
3aa6b68f WF |
157 | #define F_VCONSOLE (1<<12) /* This is a virtual console */ |
158 | #define F_HANGUP (1<<13) /* Do call vhangup(2) */ | |
0da025da | 159 | #define F_UTF8 (1<<14) /* We can do UTF8 */ |
eb8e1f9f | 160 | #define F_LOGINPAUSE (1<<15) /* Wait for any key before dropping login prompt */ |
e85281a8 DWF |
161 | #define F_NOCLEAR (1<<16) /* Do not clear the screen before prompting */ |
162 | #define F_NONL (1<<17) /* No newline before issue */ | |
163 | #define F_NOHOSTNAME (1<<18) /* Do not show the hostname */ | |
164 | #define F_LONGHNAME (1<<19) /* Show Full qualified hostname */ | |
36601b23 | 165 | #define F_NOHINTS (1<<20) /* Don't print hints */ |
01095ae3 | 166 | #define F_REMOTE (1<<21) /* Add '-h fakehost' to login(1) command line */ |
0da025da WF |
167 | |
168 | #define serial_tty_option(opt, flag) \ | |
169 | (((opt)->flags & (F_VCONSOLE|(flag))) == (flag)) | |
6dbe3af9 | 170 | |
fd6b7a7f | 171 | struct Speedtab { |
53d55042 | 172 | long speed; |
bde20e1b | 173 | speed_t code; |
fd6b7a7f KZ |
174 | }; |
175 | ||
1a204cd2 | 176 | static const struct Speedtab speedtab[] = { |
53d55042 SK |
177 | {50, B50}, |
178 | {75, B75}, | |
179 | {110, B110}, | |
180 | {134, B134}, | |
181 | {150, B150}, | |
182 | {200, B200}, | |
183 | {300, B300}, | |
184 | {600, B600}, | |
185 | {1200, B1200}, | |
186 | {1800, B1800}, | |
187 | {2400, B2400}, | |
188 | {4800, B4800}, | |
189 | {9600, B9600}, | |
fd6b7a7f | 190 | #ifdef B19200 |
53d55042 | 191 | {19200, B19200}, |
fd6b7a7f KZ |
192 | #endif |
193 | #ifdef B38400 | |
53d55042 | 194 | {38400, B38400}, |
fd6b7a7f KZ |
195 | #endif |
196 | #ifdef EXTA | |
53d55042 | 197 | {19200, EXTA}, |
fd6b7a7f KZ |
198 | #endif |
199 | #ifdef EXTB | |
53d55042 | 200 | {38400, EXTB}, |
fd6b7a7f KZ |
201 | #endif |
202 | #ifdef B57600 | |
53d55042 | 203 | {57600, B57600}, |
fd6b7a7f KZ |
204 | #endif |
205 | #ifdef B115200 | |
53d55042 | 206 | {115200, B115200}, |
fd6b7a7f KZ |
207 | #endif |
208 | #ifdef B230400 | |
53d55042 | 209 | {230400, B230400}, |
fd6b7a7f | 210 | #endif |
53d55042 | 211 | {0, 0}, |
6dbe3af9 KZ |
212 | }; |
213 | ||
729def03 | 214 | static void init_special_char(char* arg, struct options *op); |
53d55042 SK |
215 | static void parse_args(int argc, char **argv, struct options *op); |
216 | static void parse_speeds(struct options *op, char *arg); | |
729def03 WF |
217 | static void update_utmp(struct options *op); |
218 | static void open_tty(char *tty, struct termios *tp, struct options *op); | |
53d55042 | 219 | static void termio_init(struct options *op, struct termios *tp); |
0da025da | 220 | static void reset_vc (const struct options *op, struct termios *tp); |
53d55042 | 221 | static void auto_baud(struct termios *tp); |
2b945eda KZ |
222 | static void output_special_char (unsigned char c, struct options *op, |
223 | struct termios *tp, FILE *fp); | |
53d55042 SK |
224 | static void do_prompt(struct options *op, struct termios *tp); |
225 | static void next_speed(struct options *op, struct termios *tp); | |
226 | static char *get_logname(struct options *op, | |
227 | struct termios *tp, struct chardata *cp); | |
228 | static void termio_final(struct options *op, | |
229 | struct termios *tp, struct chardata *cp); | |
230 | static int caps_lock(char *s); | |
bde20e1b WF |
231 | static speed_t bcode(char *s); |
232 | static void usage(FILE * out) __attribute__((__noreturn__)); | |
763d7a87 KZ |
233 | static void log_err(const char *, ...) __attribute__((__noreturn__)) |
234 | __attribute__((__format__(printf, 1, 2))); | |
235 | static void log_warn (const char *, ...) | |
236 | __attribute__((__format__(printf, 1, 2))); | |
a694957a | 237 | static ssize_t append(char *dest, size_t len, const char *sep, const char *src); |
9aeb66dc KZ |
238 | static void check_username (const char* nm); |
239 | static void login_options_to_argv(char *argv[], int *argc, char *str, char *username); | |
6dbe3af9 | 240 | |
eb63b9b8 | 241 | /* Fake hostname for ut_host specified on command line. */ |
bde20e1b | 242 | static char *fakehost; |
eb63b9b8 | 243 | |
6dbe3af9 | 244 | #ifdef DEBUGGING |
1aba8336 SK |
245 | #ifndef |
246 | # define DEBUG_OUTPUT "/dev/ttyp0" | |
247 | #endif | |
783b08fc | 248 | #define debug(s) do { fprintf(dbf,s); fflush(dbf); } while (0) |
6dbe3af9 KZ |
249 | FILE *dbf; |
250 | #else | |
efcf26f4 KZ |
251 | #define debug(s) do { ; } while (0) |
252 | #endif | |
6dbe3af9 | 253 | |
53d55042 | 254 | int main(int argc, char **argv) |
6dbe3af9 | 255 | { |
9aeb66dc | 256 | char *username = NULL; /* login name, given to /bin/login */ |
eb8e1f9f WF |
257 | struct chardata chardata; /* will be set by get_logname() */ |
258 | struct termios termios; /* terminal mode bits */ | |
1a204cd2 | 259 | struct options options = { |
eb8e1f9f WF |
260 | .flags = F_ISSUE, /* show /etc/issue (SYSV_STYLE) */ |
261 | .login = _PATH_LOGIN, /* default login program */ | |
eb8e1f9f | 262 | .tty = "tty1", /* default tty line */ |
5676f365 | 263 | .issue = ISSUE /* default issue file */ |
70bedfa1 | 264 | }; |
9aeb66dc KZ |
265 | char *login_argv[LOGIN_ARGV_MAX + 1]; |
266 | int login_argc = 0; | |
3aa6b68f WF |
267 | struct sigaction sa, sa_hup, sa_quit, sa_int; |
268 | sigset_t set; | |
70bedfa1 KZ |
269 | |
270 | setlocale(LC_ALL, ""); | |
271 | bindtextdomain(PACKAGE, LOCALEDIR); | |
272 | textdomain(PACKAGE); | |
b75c8134 | 273 | |
3aa6b68f WF |
274 | /* In case vhangup(2) has to called */ |
275 | sa.sa_handler = SIG_IGN; | |
276 | sa.sa_flags = SA_RESTART; | |
277 | sigemptyset (&sa.sa_mask); | |
278 | sigaction(SIGHUP, &sa, &sa_hup); | |
279 | sigaction(SIGQUIT, &sa, &sa_quit); | |
280 | sigaction(SIGINT, &sa, &sa_int); | |
281 | ||
6dbe3af9 | 282 | #ifdef DEBUGGING |
1aba8336 | 283 | dbf = fopen(DEBUG_OUTPUT, "w"); |
53d55042 SK |
284 | for (int i = 1; i < argc; i++) |
285 | debug(argv[i]); | |
286 | #endif /* DEBUGGING */ | |
6dbe3af9 | 287 | |
70bedfa1 | 288 | /* Parse command-line arguments. */ |
70bedfa1 | 289 | parse_args(argc, argv, &options); |
6dbe3af9 | 290 | |
9aeb66dc KZ |
291 | login_argv[login_argc++] = options.login; /* set login program name */ |
292 | ||
70bedfa1 | 293 | /* Update the utmp file. */ |
6dbe3af9 | 294 | #ifdef SYSV_STYLE |
729def03 | 295 | update_utmp(&options); |
6dbe3af9 | 296 | #endif |
e85281a8 DWF |
297 | if (options.delay) |
298 | sleep(options.delay); | |
299 | ||
70bedfa1 | 300 | debug("calling open_tty\n"); |
53d55042 | 301 | |
70bedfa1 | 302 | /* Open the tty as standard { input, output, error }. */ |
729def03 | 303 | open_tty(options.tty, &termios, &options); |
70bedfa1 | 304 | |
3aa6b68f WF |
305 | /* Unmask SIGHUP if inherited */ |
306 | sigemptyset(&set); | |
307 | sigaddset(&set, SIGHUP); | |
308 | sigprocmask(SIG_UNBLOCK, &set, NULL); | |
309 | sigaction(SIGHUP, &sa_hup, NULL); | |
310 | ||
70bedfa1 KZ |
311 | tcsetpgrp(STDIN_FILENO, getpid()); |
312 | /* Initialize the termios settings (raw mode, eight-bit, blocking i/o). */ | |
313 | debug("calling termio_init\n"); | |
53d55042 | 314 | termio_init(&options, &termios); |
70bedfa1 | 315 | |
53d55042 | 316 | /* Write the modem init string and DO NOT flush the buffers. */ |
eb8e1f9f WF |
317 | if (serial_tty_option(&options, F_INITSTRING) && |
318 | options.initstring && *options.initstring != '\0') { | |
70bedfa1 | 319 | debug("writing init string\n"); |
729def03 | 320 | write_all(STDOUT_FILENO, options.initstring, |
3aa6b68f | 321 | strlen(options.initstring)); |
70bedfa1 KZ |
322 | } |
323 | ||
714cff30 KZ |
324 | if (options.flags & F_VCONSOLE || options.clocal != CLOCAL_MODE_ALWAYS) |
325 | /* Go to blocking mode unless -L is specified, this change | |
326 | * affects stdout, stdin and stderr as all the file descriptors | |
327 | * are created by dup(). */ | |
70bedfa1 | 328 | fcntl(STDOUT_FILENO, F_SETFL, |
53d55042 | 329 | fcntl(STDOUT_FILENO, F_GETFL, 0) & ~O_NONBLOCK); |
70bedfa1 KZ |
330 | |
331 | /* Optionally detect the baud rate from the modem status message. */ | |
332 | debug("before autobaud\n"); | |
0da025da | 333 | if (serial_tty_option(&options, F_PARSE)) |
70bedfa1 KZ |
334 | auto_baud(&termios); |
335 | ||
336 | /* Set the optional timer. */ | |
337 | if (options.timeout) | |
763d7a87 | 338 | alarm((unsigned) options.timeout); |
70bedfa1 | 339 | |
53d55042 | 340 | /* Optionally wait for CR or LF before writing /etc/issue */ |
0da025da | 341 | if (serial_tty_option(&options, F_WAITCRLF)) { |
70bedfa1 KZ |
342 | char ch; |
343 | ||
344 | debug("waiting for cr-lf\n"); | |
53d55042 SK |
345 | while (read(STDIN_FILENO, &ch, 1) == 1) { |
346 | /* Strip "parity bit". */ | |
347 | ch &= 0x7f; | |
fd6b7a7f | 348 | #ifdef DEBUGGING |
70bedfa1 | 349 | fprintf(dbf, "read %c\n", ch); |
fd6b7a7f | 350 | #endif |
53d55042 SK |
351 | if (ch == '\n' || ch == '\r') |
352 | break; | |
70bedfa1 | 353 | } |
726f69e2 | 354 | } |
726f69e2 | 355 | |
f5664477 | 356 | INIT_CHARDATA(&chardata); |
933956cb KZ |
357 | |
358 | if (options.autolog) { | |
359 | debug("doing auto login\n"); | |
360 | username = options.autolog; | |
361 | } | |
362 | ||
1683f6bf | 363 | if ((options.flags & F_NOPROMPT) == 0) { |
eb8e1f9f | 364 | if (options.autolog) { |
933956cb | 365 | /* Autologin prompt */ |
eb8e1f9f | 366 | do_prompt(&options, &termios); |
8c219bf4 | 367 | printf(_("%s%s (automatic login)\n"), LOGIN, options.autolog); |
eb8e1f9f WF |
368 | } else { |
369 | /* Read the login name. */ | |
370 | debug("reading login name\n"); | |
9aeb66dc | 371 | while ((username = |
f8bd089b | 372 | get_logname(&options, &termios, &chardata)) == NULL) |
eb8e1f9f WF |
373 | if ((options.flags & F_VCONSOLE) == 0) |
374 | next_speed(&options, &termios); | |
375 | } | |
70bedfa1 | 376 | } |
6dbe3af9 | 377 | |
70bedfa1 | 378 | /* Disable timer. */ |
70bedfa1 | 379 | if (options.timeout) |
53d55042 | 380 | alarm(0); |
6dbe3af9 | 381 | |
0da025da WF |
382 | if ((options.flags & F_VCONSOLE) == 0) { |
383 | /* Finalize the termios settings. */ | |
384 | termio_final(&options, &termios, &chardata); | |
6dbe3af9 | 385 | |
0da025da WF |
386 | /* Now the newline character should be properly written. */ |
387 | write_all(STDOUT_FILENO, "\r\n", 2); | |
388 | } | |
6dbe3af9 | 389 | |
763d7a87 KZ |
390 | sigaction(SIGQUIT, &sa_quit, NULL); |
391 | sigaction(SIGINT, &sa_int, NULL); | |
3aa6b68f | 392 | |
9aeb66dc KZ |
393 | if (username) |
394 | check_username(username); | |
395 | ||
396 | if (options.logopt) { | |
397 | /* | |
398 | * The --login-options completely overwrites the default | |
399 | * way how agetty composes login(1) command line. | |
400 | */ | |
401 | login_options_to_argv(login_argv, &login_argc, | |
402 | options.logopt, username); | |
01095ae3 KZ |
403 | } else { |
404 | if (fakehost && (options.flags & F_REMOTE)) { | |
405 | login_argv[login_argc++] = "-h"; | |
406 | login_argv[login_argc++] = fakehost; | |
407 | } | |
408 | if (username) { | |
409 | if (options.autolog) | |
410 | login_argv[login_argc++] = "-f"; | |
411 | else | |
412 | login_argv[login_argc++] = "--"; | |
413 | login_argv[login_argc++] = username; | |
414 | } | |
9aeb66dc | 415 | } |
eb8e1f9f | 416 | |
9aeb66dc | 417 | login_argv[login_argc] = NULL; /* last login argv */ |
eb8e1f9f | 418 | |
e85281a8 DWF |
419 | if (options.chroot) { |
420 | if (chroot(options.chroot) < 0) | |
421 | log_err(_("%s: can't change root directory %s: %m"), | |
422 | options.tty, options.chroot); | |
423 | } | |
424 | if (options.chdir) { | |
425 | if (chdir(options.chdir) < 0) | |
426 | log_err(_("%s: can't change working directory %s: %m"), | |
427 | options.tty, options.chdir); | |
428 | } | |
429 | if (options.nice) { | |
430 | if (nice(options.nice) < 0) | |
431 | log_warn(_("%s: can't change process priority: %m"), | |
432 | options.tty); | |
433 | } | |
434 | ||
1aba8336 SK |
435 | #ifdef DEBUGGING |
436 | fprintf(dbf, "read %c\n", ch); | |
437 | if (close_stream(dbf) != 0) | |
438 | log_err("write failed: %s", DEBUG_OUTPUT); | |
439 | #endif | |
440 | ||
70bedfa1 | 441 | /* Let the login program take care of password validation. */ |
9aeb66dc KZ |
442 | execv(options.login, login_argv); |
443 | log_err(_("%s: can't exec %s: %m"), options.tty, login_argv[0]); | |
444 | } | |
445 | ||
446 | /* | |
447 | * Returns : @str if \u not found | |
448 | * : @username if @str equal to "\u" | |
449 | * : newly allocated string if \u mixed with something other | |
450 | */ | |
451 | static char *replace_u(char *str, char *username) | |
452 | { | |
453 | char *entry = NULL, *p = str; | |
454 | size_t usz = username ? strlen(username) : 0; | |
455 | ||
456 | while (*p) { | |
457 | size_t sz; | |
458 | char *tp, *old = entry; | |
459 | ||
460 | if (memcmp(p, "\\u", 2)) { | |
461 | p++; | |
462 | continue; /* no \u */ | |
463 | } | |
464 | sz = strlen(str); | |
465 | ||
466 | if (p == str && sz == 2) | |
467 | /* 'str' contains only '\u' */ | |
468 | return username; | |
469 | ||
470 | tp = entry = malloc(sz + usz); | |
471 | if (!tp) | |
472 | log_err(_("failed to allocate memory: %m")); | |
473 | ||
474 | if (p != str) { | |
475 | /* copy chars befor \u */ | |
476 | memcpy(tp, str, p - str); | |
477 | tp += p - str; | |
478 | } | |
479 | if (usz) { | |
480 | /* copy username */ | |
481 | memcpy(tp, username, usz); | |
482 | tp += usz; | |
483 | } | |
484 | if (*(p + 2)) | |
485 | /* copy chars after \u + \0 */ | |
486 | memcpy(tp, p + 2, sz - (p - str) - 1); | |
487 | else | |
488 | *tp = '\0'; | |
489 | ||
490 | p = tp; | |
491 | str = entry; | |
492 | free(old); | |
493 | } | |
494 | ||
495 | return entry ? entry : str; | |
496 | } | |
497 | ||
498 | static void login_options_to_argv(char *argv[], int *argc, | |
499 | char *str, char *username) | |
500 | { | |
501 | char *p; | |
502 | int i = *argc; | |
503 | ||
504 | while (str && isspace(*str)) | |
505 | str++; | |
506 | p = str; | |
507 | ||
508 | while (p && *p && i < LOGIN_ARGV_MAX) { | |
509 | if (isspace(*p)) { | |
510 | *p = '\0'; | |
511 | while (isspace(*++p)) | |
512 | ; | |
513 | if (*p) { | |
514 | argv[i++] = replace_u(str, username); | |
515 | str = p; | |
516 | } | |
517 | } else | |
518 | p++; | |
519 | } | |
520 | if (str && *str && i < LOGIN_ARGV_MAX) | |
521 | argv[i++] = replace_u(str, username); | |
522 | *argc = i; | |
6dbe3af9 KZ |
523 | } |
524 | ||
53d55042 | 525 | /* Parse command-line arguments. */ |
bde20e1b | 526 | static void parse_args(int argc, char **argv, struct options *op) |
6dbe3af9 | 527 | { |
53d55042 | 528 | int c; |
70bedfa1 KZ |
529 | |
530 | enum { | |
531 | VERSION_OPTION = CHAR_MAX + 1, | |
36601b23 | 532 | NOHINTS_OPTION, |
e85281a8 DWF |
533 | NOHOSTNAME_OPTION, |
534 | LONGHOSTNAME_OPTION, | |
cb872ac9 KZ |
535 | HELP_OPTION, |
536 | ERASE_CHARS_OPTION, | |
537 | KILL_CHARS_OPTION, | |
70bedfa1 | 538 | }; |
3aa6b68f | 539 | const struct option longopts[] = { |
70bedfa1 | 540 | { "8bits", no_argument, 0, '8' }, |
eb8e1f9f | 541 | { "autologin", required_argument, 0, 'a' }, |
70bedfa1 | 542 | { "noreset", no_argument, 0, 'c' }, |
e85281a8 DWF |
543 | { "chdir", required_argument, 0, 'C' }, |
544 | { "delay", required_argument, 0, 'd' }, | |
01095ae3 | 545 | { "remote", no_argument, 0, 'E' }, |
70bedfa1 KZ |
546 | { "issue-file", required_argument, 0, 'f' }, |
547 | { "flow-control", no_argument, 0, 'h' }, | |
548 | { "host", required_argument, 0, 'H' }, | |
549 | { "noissue", no_argument, 0, 'i' }, | |
550 | { "init-string", required_argument, 0, 'I' }, | |
e85281a8 | 551 | { "noclear", no_argument, 0, 'J' }, |
70bedfa1 | 552 | { "login-program", required_argument, 0, 'l' }, |
ef264c83 | 553 | { "local-line", optional_argument, 0, 'L' }, |
70bedfa1 KZ |
554 | { "extract-baud", no_argument, 0, 'm' }, |
555 | { "skip-login", no_argument, 0, 'n' }, | |
e85281a8 | 556 | { "nonewline", no_argument, 0, 'N' }, |
eb8e1f9f | 557 | { "login-options", required_argument, 0, 'o' }, |
3fc62fd3 | 558 | { "login-pause", no_argument, 0, 'p' }, |
e85281a8 DWF |
559 | { "nice", required_argument, 0, 'P' }, |
560 | { "chroot", required_argument, 0, 'r' }, | |
3aa6b68f | 561 | { "hangup", no_argument, 0, 'R' }, |
70bedfa1 KZ |
562 | { "keep-baud", no_argument, 0, 's' }, |
563 | { "timeout", required_argument, 0, 't' }, | |
564 | { "detect-case", no_argument, 0, 'U' }, | |
565 | { "wait-cr", no_argument, 0, 'w' }, | |
36601b23 | 566 | { "nohints", no_argument, 0, NOHINTS_OPTION }, |
3fc62fd3 | 567 | { "nohostname", no_argument, 0, NOHOSTNAME_OPTION }, |
e85281a8 | 568 | { "long-hostname", no_argument, 0, LONGHOSTNAME_OPTION }, |
70bedfa1 KZ |
569 | { "version", no_argument, 0, VERSION_OPTION }, |
570 | { "help", no_argument, 0, HELP_OPTION }, | |
cb872ac9 KZ |
571 | { "erase-chars", required_argument, 0, ERASE_CHARS_OPTION }, |
572 | { "kill-chars", required_argument, 0, KILL_CHARS_OPTION }, | |
70bedfa1 KZ |
573 | { NULL, 0, 0, 0 } |
574 | }; | |
575 | ||
763d7a87 | 576 | while ((c = getopt_long(argc, argv, |
01095ae3 | 577 | "8a:cC:d:Ef:hH:iI:Jl:LmnNo:pP:r:Rst:Uw", longopts, |
53d55042 | 578 | NULL)) != -1) { |
70bedfa1 KZ |
579 | switch (c) { |
580 | case '8': | |
bde20e1b | 581 | op->flags |= F_EIGHTBITS; |
70bedfa1 | 582 | break; |
eb8e1f9f WF |
583 | case 'a': |
584 | op->autolog = optarg; | |
585 | break; | |
70bedfa1 KZ |
586 | case 'c': |
587 | op->flags |= F_KEEPCFLAGS; | |
588 | break; | |
e85281a8 DWF |
589 | case 'C': |
590 | op->chdir = optarg; | |
591 | break; | |
592 | case 'd': | |
593 | op->delay = atoi(optarg); | |
594 | break; | |
01095ae3 KZ |
595 | case 'E': |
596 | op->flags |= F_REMOTE; | |
597 | break; | |
53d55042 | 598 | case 'f': |
70bedfa1 KZ |
599 | op->flags |= F_CUSTISSUE; |
600 | op->issue = optarg; | |
601 | break; | |
53d55042 | 602 | case 'h': |
70bedfa1 KZ |
603 | op->flags |= F_RTSCTS; |
604 | break; | |
53d55042 | 605 | case 'H': |
70bedfa1 KZ |
606 | fakehost = optarg; |
607 | break; | |
53d55042 | 608 | case 'i': |
70bedfa1 KZ |
609 | op->flags &= ~F_ISSUE; |
610 | break; | |
611 | case 'I': | |
729def03 WF |
612 | init_special_char(optarg, op); |
613 | op->flags |= F_INITSTRING; | |
614 | break; | |
e85281a8 DWF |
615 | case 'J': |
616 | op->flags |= F_NOCLEAR; | |
617 | break; | |
70bedfa1 | 618 | case 'l': |
53d55042 | 619 | op->login = optarg; |
70bedfa1 | 620 | break; |
53d55042 | 621 | case 'L': |
ef264c83 KZ |
622 | /* -L and -L=always have the same meaning */ |
623 | op->clocal = CLOCAL_MODE_ALWAYS; | |
624 | if (optarg) { | |
625 | if (strcmp(optarg, "=always") == 0) | |
626 | op->clocal = CLOCAL_MODE_ALWAYS; | |
627 | else if (strcmp(optarg, "=never") == 0) | |
628 | op->clocal = CLOCAL_MODE_NEVER; | |
629 | else if (strcmp(optarg, "=auto") == 0) | |
630 | op->clocal = CLOCAL_MODE_AUTO; | |
631 | else | |
632 | log_err(_("unssuported --local-line mode argument")); | |
633 | } | |
70bedfa1 | 634 | break; |
53d55042 | 635 | case 'm': |
70bedfa1 KZ |
636 | op->flags |= F_PARSE; |
637 | break; | |
638 | case 'n': | |
639 | op->flags |= F_NOPROMPT; | |
640 | break; | |
eb8e1f9f WF |
641 | case 'o': |
642 | op->logopt = optarg; | |
643 | break; | |
644 | case 'p': | |
645 | op->flags |= F_LOGINPAUSE; | |
646 | break; | |
e85281a8 DWF |
647 | case 'P': |
648 | op->nice = atoi(optarg); | |
649 | break; | |
650 | case 'r': | |
651 | op->chroot = optarg; | |
652 | break; | |
3aa6b68f WF |
653 | case 'R': |
654 | op->flags |= F_HANGUP; | |
655 | break; | |
70bedfa1 | 656 | case 's': |
53d55042 | 657 | op->flags |= F_KEEPSPEED; |
70bedfa1 | 658 | break; |
53d55042 | 659 | case 't': |
70bedfa1 | 660 | if ((op->timeout = atoi(optarg)) <= 0) |
bde20e1b | 661 | log_err(_("bad timeout value: %s"), optarg); |
70bedfa1 KZ |
662 | break; |
663 | case 'U': | |
664 | op->flags |= F_LCUC; | |
665 | break; | |
666 | case 'w': | |
667 | op->flags |= F_WAITCRLF; | |
668 | break; | |
36601b23 KZ |
669 | case NOHINTS_OPTION: |
670 | op->flags |= F_NOHINTS; | |
671 | break; | |
e85281a8 DWF |
672 | case NOHOSTNAME_OPTION: |
673 | op->flags |= F_NOHOSTNAME; | |
674 | break; | |
675 | case LONGHOSTNAME_OPTION: | |
676 | op->flags |= F_LONGHNAME; | |
677 | break; | |
cb872ac9 KZ |
678 | case ERASE_CHARS_OPTION: |
679 | op->erasechars = optarg; | |
680 | break; | |
681 | case KILL_CHARS_OPTION: | |
682 | op->killchars = optarg; | |
683 | break; | |
70bedfa1 KZ |
684 | case VERSION_OPTION: |
685 | printf(_("%s from %s\n"), program_invocation_short_name, | |
53d55042 | 686 | PACKAGE_STRING); |
70bedfa1 KZ |
687 | exit(EXIT_SUCCESS); |
688 | case HELP_OPTION: | |
689 | usage(stdout); | |
690 | default: | |
691 | usage(stderr); | |
726f69e2 | 692 | } |
6dbe3af9 | 693 | } |
70bedfa1 KZ |
694 | |
695 | debug("after getopt loop\n"); | |
696 | ||
729def03 | 697 | if (argc < optind + 1) { |
bde20e1b | 698 | log_warn(_("not enough arguments")); |
70bedfa1 KZ |
699 | usage(stderr); |
700 | } | |
701 | ||
729def03 | 702 | /* Accept "tty", "baudrate tty", and "tty baudrate". */ |
53d55042 SK |
703 | if ('0' <= argv[optind][0] && argv[optind][0] <= '9') { |
704 | /* Assume BSD style speed. */ | |
705 | parse_speeds(op, argv[optind++]); | |
729def03 WF |
706 | if (argc < optind + 1) { |
707 | warn(_("not enough arguments")); | |
708 | usage(stderr); | |
709 | } | |
710 | op->tty = argv[optind++]; | |
70bedfa1 | 711 | } else { |
53d55042 | 712 | op->tty = argv[optind++]; |
729def03 WF |
713 | if (argc > optind) { |
714 | char *v = argv[optind++]; | |
715 | if ('0' <= *v && *v <= '9') | |
716 | parse_speeds(op, v); | |
717 | else | |
718 | op->speeds[op->numspeed++] = bcode("9600"); | |
719 | } | |
70bedfa1 KZ |
720 | } |
721 | ||
729def03 WF |
722 | /* On virtual console remember the line which is used for */ |
723 | if (strncmp(op->tty, "tty", 3) == 0 && | |
724 | strspn(op->tty + 3, "0123456789") == strlen(op->tty+3)) | |
725 | op->vcline = op->tty+3; | |
726 | ||
70bedfa1 | 727 | if (argc > optind && argv[optind]) |
729def03 | 728 | op->term = argv[optind]; |
6dbe3af9 | 729 | |
66ee8158 | 730 | #ifdef DO_DEVFS_FIDDLING |
70bedfa1 | 731 | /* |
53d55042 | 732 | * Some devfs junk, following Goswin Brederlow: |
70bedfa1 KZ |
733 | * turn ttyS<n> into tts/<n> |
734 | * turn tty<n> into vc/<n> | |
53d55042 | 735 | * http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=72241 |
70bedfa1 KZ |
736 | */ |
737 | if (op->tty && strlen(op->tty) < 90) { | |
738 | char dev_name[100]; | |
739 | struct stat st; | |
740 | ||
741 | if (strncmp(op->tty, "ttyS", 4) == 0) { | |
742 | strcpy(dev_name, "/dev/"); | |
743 | strcat(dev_name, op->tty); | |
744 | if (stat(dev_name, &st) < 0) { | |
745 | strcpy(dev_name, "/dev/tts/"); | |
746 | strcat(dev_name, op->tty + 4); | |
ca8e91a4 KZ |
747 | if (stat(dev_name, &st) == 0) { |
748 | op->tty = strdup(dev_name + 5); | |
749 | if (!op->tty) | |
750 | log_err(_("failed to allocate memory: %m")); | |
751 | } | |
70bedfa1 KZ |
752 | } |
753 | } else if (strncmp(op->tty, "tty", 3) == 0) { | |
754 | strcpy(dev_name, "/dev/"); | |
755 | strncat(dev_name, op->tty, 90); | |
756 | if (stat(dev_name, &st) < 0) { | |
757 | strcpy(dev_name, "/dev/vc/"); | |
758 | strcat(dev_name, op->tty + 3); | |
ca8e91a4 KZ |
759 | if (stat(dev_name, &st) == 0) { |
760 | op->tty = strdup(dev_name + 5); | |
761 | if (!op->tty) | |
762 | log_err(_("failed to allocate memory: %m")); | |
763 | } | |
70bedfa1 KZ |
764 | } |
765 | } | |
766 | } | |
53d55042 | 767 | #endif /* DO_DEVFS_FIDDLING */ |
66ee8158 | 768 | |
70bedfa1 | 769 | debug("exiting parseargs\n"); |
6dbe3af9 KZ |
770 | } |
771 | ||
53d55042 | 772 | /* Parse alternate baud rates. */ |
bde20e1b | 773 | static void parse_speeds(struct options *op, char *arg) |
6dbe3af9 | 774 | { |
53d55042 | 775 | char *cp; |
6dbe3af9 | 776 | |
f021834e | 777 | debug("entered parse_speeds\n"); |
f8bd089b | 778 | for (cp = strtok(arg, ","); cp != NULL; cp = strtok((char *)0, ",")) { |
70bedfa1 | 779 | if ((op->speeds[op->numspeed++] = bcode(cp)) <= 0) |
bde20e1b | 780 | log_err(_("bad speed: %s"), cp); |
70bedfa1 | 781 | if (op->numspeed >= MAX_SPEED) |
bde20e1b | 782 | log_err(_("too many alternate speeds")); |
70bedfa1 KZ |
783 | } |
784 | debug("exiting parsespeeds\n"); | |
6dbe3af9 KZ |
785 | } |
786 | ||
787 | #ifdef SYSV_STYLE | |
788 | ||
53d55042 | 789 | /* Update our utmp entry. */ |
729def03 | 790 | static void update_utmp(struct options *op) |
6dbe3af9 | 791 | { |
53d55042 SK |
792 | struct utmp ut; |
793 | time_t t; | |
729def03 WF |
794 | pid_t pid = getpid(); |
795 | pid_t sid = getsid(0); | |
796 | char *vcline = op->vcline; | |
797 | char *line = op->tty; | |
53d55042 | 798 | struct utmp *utp; |
70bedfa1 KZ |
799 | |
800 | /* | |
801 | * The utmp file holds miscellaneous information about things started by | |
802 | * /sbin/init and other system-related events. Our purpose is to update | |
803 | * the utmp entry for the current process, in particular the process type | |
804 | * and the tty line we are listening to. Return successfully only if the | |
805 | * utmp file can be opened for update, and if we are able to find our | |
806 | * entry in the utmp file. | |
807 | */ | |
70bedfa1 KZ |
808 | utmpname(_PATH_UTMP); |
809 | setutent(); | |
810 | ||
53d55042 | 811 | /* |
729def03 | 812 | * Find my pid in utmp. |
53d55042 SK |
813 | * |
814 | * FIXME: Earlier (when was that?) code here tested only utp->ut_type != | |
815 | * INIT_PROCESS, so maybe the >= here should be >. | |
816 | * | |
817 | * FIXME: The present code is taken from login.c, so if this is changed, | |
818 | * maybe login has to be changed as well (is this true?). | |
819 | */ | |
70bedfa1 | 820 | while ((utp = getutent())) |
729def03 | 821 | if (utp->ut_pid == pid |
70bedfa1 KZ |
822 | && utp->ut_type >= INIT_PROCESS |
823 | && utp->ut_type <= DEAD_PROCESS) | |
824 | break; | |
825 | ||
826 | if (utp) { | |
827 | memcpy(&ut, utp, sizeof(ut)); | |
828 | } else { | |
53d55042 | 829 | /* Some inits do not initialize utmp. */ |
70bedfa1 | 830 | memset(&ut, 0, sizeof(ut)); |
729def03 WF |
831 | if (vcline && *vcline) |
832 | /* Standard virtual console devices */ | |
763d7a87 | 833 | strncpy(ut.ut_id, vcline, sizeof(ut.ut_id)); |
729def03 WF |
834 | else { |
835 | size_t len = strlen(line); | |
836 | char * ptr; | |
763d7a87 KZ |
837 | if (len >= sizeof(ut.ut_id)) |
838 | ptr = line + len - sizeof(ut.ut_id); | |
729def03 WF |
839 | else |
840 | ptr = line; | |
763d7a87 | 841 | strncpy(ut.ut_id, ptr, sizeof(ut.ut_id)); |
729def03 | 842 | } |
70bedfa1 KZ |
843 | } |
844 | ||
845 | strncpy(ut.ut_user, "LOGIN", sizeof(ut.ut_user)); | |
846 | strncpy(ut.ut_line, line, sizeof(ut.ut_line)); | |
847 | if (fakehost) | |
848 | strncpy(ut.ut_host, fakehost, sizeof(ut.ut_host)); | |
849 | time(&t); | |
850 | ut.ut_time = t; | |
851 | ut.ut_type = LOGIN_PROCESS; | |
729def03 WF |
852 | ut.ut_pid = pid; |
853 | ut.ut_session = sid; | |
70bedfa1 KZ |
854 | |
855 | pututline(&ut); | |
856 | endutent(); | |
857 | ||
858 | { | |
48d7b13a | 859 | #ifdef HAVE_UPDWTMP |
70bedfa1 | 860 | updwtmp(_PATH_WTMP, &ut); |
5c36a0eb | 861 | #else |
70bedfa1 KZ |
862 | int ut_fd; |
863 | int lf; | |
864 | ||
53d55042 | 865 | if ((lf = open(_PATH_WTMPLOCK, O_CREAT | O_WRONLY, 0660)) >= 0) { |
70bedfa1 | 866 | flock(lf, LOCK_EX); |
53d55042 SK |
867 | if ((ut_fd = |
868 | open(_PATH_WTMP, O_APPEND | O_WRONLY)) >= 0) { | |
729def03 | 869 | write_all(ut_fd, &ut, sizeof(ut)); |
70bedfa1 KZ |
870 | close(ut_fd); |
871 | } | |
872 | flock(lf, LOCK_UN); | |
873 | close(lf); | |
874 | } | |
53d55042 | 875 | #endif /* HAVE_UPDWTMP */ |
70bedfa1 | 876 | } |
6dbe3af9 KZ |
877 | } |
878 | ||
53d55042 | 879 | #endif /* SYSV_STYLE */ |
6dbe3af9 | 880 | |
53d55042 | 881 | /* Set up tty as stdin, stdout & stderr. */ |
729def03 | 882 | static void open_tty(char *tty, struct termios *tp, struct options *op) |
6dbe3af9 | 883 | { |
3aa6b68f | 884 | const pid_t pid = getpid(); |
783b08fc | 885 | int serial, closed = 0; |
6dbe3af9 | 886 | |
3aa6b68f WF |
887 | /* Set up new standard input, unless we are given an already opened port. */ |
888 | ||
889 | if (strcmp(tty, "-") != 0) { | |
890 | char buf[PATH_MAX+1]; | |
891 | struct group *gr = NULL; | |
70bedfa1 | 892 | struct stat st; |
3aa6b68f WF |
893 | int fd, len; |
894 | pid_t tid; | |
895 | gid_t gid = 0; | |
896 | ||
897 | /* Use tty group if available */ | |
898 | if ((gr = getgrnam("tty"))) | |
899 | gid = gr->gr_gid; | |
900 | ||
763d7a87 KZ |
901 | if (((len = snprintf(buf, sizeof(buf), "/dev/%s", tty)) >= |
902 | (int)sizeof(buf)) || (len < 0)) | |
3aa6b68f WF |
903 | log_err(_("/dev/%s: cannot open as standard input: %m"), tty); |
904 | ||
905 | /* | |
906 | * There is always a race between this reset and the call to | |
907 | * vhangup() that s.o. can use to get access to your tty. | |
908 | * Linux login(1) will change tty permissions. Use root owner and group | |
909 | * with permission -rw------- for the period between getty and login. | |
910 | */ | |
91984e93 | 911 | if (chown(buf, 0, gid) || chmod(buf, (gid ? 0620 : 0600))) { |
3aa6b68f WF |
912 | if (errno == EROFS) |
913 | log_warn("%s: %m", buf); | |
914 | else | |
915 | log_err("%s: %m", buf); | |
916 | } | |
6dbe3af9 | 917 | |
3aa6b68f WF |
918 | /* Open the tty as standard input. */ |
919 | if ((fd = open(buf, O_RDWR|O_NOCTTY|O_NONBLOCK, 0)) < 0) | |
920 | log_err(_("/dev/%s: cannot open as standard input: %m"), tty); | |
921 | ||
922 | /* Sanity checks... */ | |
763d7a87 | 923 | if (!isatty(fd)) |
3aa6b68f WF |
924 | log_err(_("/dev/%s: not a character device"), tty); |
925 | if (fstat(fd, &st) < 0) | |
763d7a87 | 926 | log_err("%s: %m", buf); |
70bedfa1 | 927 | if ((st.st_mode & S_IFMT) != S_IFCHR) |
bde20e1b | 928 | log_err(_("/dev/%s: not a character device"), tty); |
6dbe3af9 | 929 | |
3aa6b68f | 930 | if (((tid = tcgetsid(fd)) < 0) || (pid != tid)) { |
763d7a87 | 931 | if (ioctl(fd, TIOCSCTTY, 1) == -1) |
8c219bf4 | 932 | log_warn(_("/dev/%s: cannot get controlling tty: %m"), tty); |
3aa6b68f WF |
933 | } |
934 | ||
783b08fc KZ |
935 | close(STDIN_FILENO); |
936 | errno = 0; | |
937 | ||
3aa6b68f | 938 | if (op->flags & F_HANGUP) { |
783b08fc KZ |
939 | |
940 | if (ioctl(fd, TIOCNOTTY)) | |
941 | debug("TIOCNOTTY ioctl failed\n"); | |
942 | ||
3aa6b68f | 943 | /* |
783b08fc KZ |
944 | * Let's close all file decriptors before vhangup |
945 | * https://lkml.org/lkml/2012/6/5/145 | |
3aa6b68f | 946 | */ |
783b08fc KZ |
947 | close(fd); |
948 | close(STDOUT_FILENO); | |
949 | close(STDERR_FILENO); | |
950 | errno = 0; | |
951 | closed = 1; | |
952 | ||
3aa6b68f | 953 | if (vhangup()) |
8c219bf4 | 954 | log_err(_("/dev/%s: vhangup() failed: %m"), tty); |
783b08fc KZ |
955 | } else |
956 | close(fd); | |
6dbe3af9 | 957 | |
70bedfa1 | 958 | debug("open(2)\n"); |
3aa6b68f WF |
959 | if (open(buf, O_RDWR|O_NOCTTY|O_NONBLOCK, 0) != 0) |
960 | log_err(_("/dev/%s: cannot open as standard input: %m"), tty); | |
783b08fc | 961 | |
3aa6b68f | 962 | if (((tid = tcgetsid(STDIN_FILENO)) < 0) || (pid != tid)) { |
763d7a87 | 963 | if (ioctl(STDIN_FILENO, TIOCSCTTY, 1) == -1) |
8c219bf4 | 964 | log_warn(_("/dev/%s: cannot get controlling tty: %m"), tty); |
3aa6b68f WF |
965 | } |
966 | ||
70bedfa1 | 967 | } else { |
3aa6b68f | 968 | |
70bedfa1 KZ |
969 | /* |
970 | * Standard input should already be connected to an open port. Make | |
971 | * sure it is open for read/write. | |
972 | */ | |
3aa6b68f | 973 | |
70bedfa1 | 974 | if ((fcntl(STDIN_FILENO, F_GETFL, 0) & O_RDWR) != O_RDWR) |
bde20e1b | 975 | log_err(_("%s: not open for read/write"), tty); |
3aa6b68f | 976 | |
70bedfa1 KZ |
977 | } |
978 | ||
3aa6b68f | 979 | if (tcsetpgrp(STDIN_FILENO, pid)) |
8c219bf4 | 980 | log_warn(_("/dev/%s: cannot set process group: %m"), tty); |
3aa6b68f WF |
981 | |
982 | /* Get rid of the present outputs. */ | |
783b08fc KZ |
983 | if (!closed) { |
984 | close(STDOUT_FILENO); | |
985 | close(STDERR_FILENO); | |
986 | errno = 0; | |
987 | } | |
3aa6b68f | 988 | |
70bedfa1 KZ |
989 | /* Set up standard output and standard error file descriptors. */ |
990 | debug("duping\n"); | |
53d55042 | 991 | |
70bedfa1 KZ |
992 | /* set up stdout and stderr */ |
993 | if (dup(STDIN_FILENO) != 1 || dup(STDIN_FILENO) != 2) | |
bde20e1b | 994 | log_err(_("%s: dup problem: %m"), tty); |
6dbe3af9 | 995 | |
3aa6b68f WF |
996 | /* make stdio unbuffered for slow modem lines */ |
997 | setvbuf(stdout, NULL, _IONBF, 0); | |
998 | ||
6dbe3af9 | 999 | /* |
70bedfa1 KZ |
1000 | * The following ioctl will fail if stdin is not a tty, but also when |
1001 | * there is noise on the modem control lines. In the latter case, the | |
53d55042 SK |
1002 | * common course of action is (1) fix your cables (2) give the modem |
1003 | * more time to properly reset after hanging up. | |
1004 | * | |
1005 | * SunOS users can achieve (2) by patching the SunOS kernel variable | |
1006 | * "zsadtrlow" to a larger value; 5 seconds seems to be a good value. | |
1007 | * http://www.sunmanagers.org/archives/1993/0574.html | |
6dbe3af9 | 1008 | */ |
bde20e1b | 1009 | memset(tp, 0, sizeof(struct termios)); |
70bedfa1 | 1010 | if (tcgetattr(STDIN_FILENO, tp) < 0) |
8c219bf4 | 1011 | log_err(_("%s: failed to get terminal attributes: %m"), tty); |
70bedfa1 KZ |
1012 | |
1013 | /* | |
3aa6b68f WF |
1014 | * Detect if this is a virtual console or serial/modem line. |
1015 | * In case of a virtual console the ioctl TIOCMGET fails and | |
1016 | * the error number will be set to EINVAL. | |
70bedfa1 | 1017 | */ |
89aed1c9 | 1018 | if (ioctl(STDIN_FILENO, TIOCMGET, &serial) < 0 && (errno == EINVAL)) { |
3aa6b68f WF |
1019 | op->flags |= F_VCONSOLE; |
1020 | if (!op->term) | |
1021 | op->term = DEFAULT_VCTERM; | |
1022 | } else if (!op->term) | |
1023 | op->term = DEFAULT_STERM; | |
729def03 WF |
1024 | |
1025 | setenv("TERM", op->term, 1); | |
6dbe3af9 KZ |
1026 | } |
1027 | ||
53d55042 | 1028 | /* Initialize termios settings. */ |
bde20e1b | 1029 | static void termio_init(struct options *op, struct termios *tp) |
6dbe3af9 | 1030 | { |
70bedfa1 | 1031 | speed_t ispeed, ospeed; |
1683f6bf | 1032 | struct winsize ws; |
70bedfa1 | 1033 | |
0da025da WF |
1034 | if (op->flags & F_VCONSOLE) { |
1035 | #if defined(IUTF8) && defined(KDGKBMODE) | |
1036 | int mode; | |
1037 | ||
1038 | /* Detect mode of current keyboard setup, e.g. for UTF-8 */ | |
1039 | if (ioctl(STDIN_FILENO, KDGKBMODE, &mode) < 0) | |
1040 | mode = K_RAW; | |
1041 | switch(mode) { | |
1042 | case K_UNICODE: | |
b0198a11 | 1043 | setlocale(LC_CTYPE, "C.UTF-8"); |
0da025da WF |
1044 | op->flags |= F_UTF8; |
1045 | break; | |
1046 | case K_RAW: | |
1047 | case K_MEDIUMRAW: | |
1048 | case K_XLATE: | |
1049 | default: | |
1050 | setlocale(LC_CTYPE, "POSIX"); | |
1051 | op->flags &= ~F_UTF8; | |
1052 | break; | |
1053 | } | |
1054 | #else | |
1055 | setlocale(LC_CTYPE, "POSIX"); | |
1056 | op->flags &= ~F_UTF8; | |
1057 | #endif | |
1058 | reset_vc(op, tp); | |
1059 | ||
1060 | if ((tp->c_cflag & (CS8|PARODD|PARENB)) == CS8) | |
1061 | op->flags |= F_EIGHTBITS; | |
1062 | ||
e85281a8 DWF |
1063 | if ((op->flags & F_NOCLEAR) == 0) { |
1064 | /* | |
1065 | * Do not write a full reset (ESC c) because this destroys | |
1066 | * the unicode mode again if the terminal was in unicode | |
1067 | * mode. Also it clears the CONSOLE_MAGIC features which | |
1068 | * are required for some languages/console-fonts. | |
1069 | * Just put the cursor to the home position (ESC [ H), | |
1070 | * erase everything below the cursor (ESC [ J), and set the | |
1071 | * scrolling region to the full window (ESC [ r) | |
1072 | */ | |
1073 | write_all(STDOUT_FILENO, "\033[r\033[H\033[J", 9); | |
1074 | } | |
0da025da WF |
1075 | return; |
1076 | } | |
1077 | ||
70bedfa1 | 1078 | if (op->flags & F_KEEPSPEED) { |
53d55042 SK |
1079 | /* Save the original setting. */ |
1080 | ispeed = cfgetispeed(tp); | |
70bedfa1 | 1081 | ospeed = cfgetospeed(tp); |
1683f6bf DWF |
1082 | |
1083 | if (!ispeed) ispeed = TTYDEF_SPEED; | |
1084 | if (!ospeed) ospeed = TTYDEF_SPEED; | |
1085 | ||
53d55042 | 1086 | } else { |
70bedfa1 | 1087 | ospeed = ispeed = op->speeds[FIRST_SPEED]; |
53d55042 | 1088 | } |
70bedfa1 KZ |
1089 | |
1090 | /* | |
1091 | * Initial termios settings: 8-bit characters, raw-mode, blocking i/o. | |
1092 | * Special characters are set after we have read the login name; all | |
1093 | * reads will be done in raw mode anyway. Errors will be dealt with | |
53d55042 | 1094 | * later on. |
70bedfa1 | 1095 | */ |
53d55042 SK |
1096 | |
1097 | /* Flush input and output queues, important for modems! */ | |
1098 | tcflush(STDIN_FILENO, TCIOFLUSH); | |
70bedfa1 | 1099 | |
8408647d WF |
1100 | #ifdef IUTF8 |
1101 | tp->c_iflag = tp->c_iflag & IUTF8; | |
7478fce0 ST |
1102 | if (tp->c_iflag & IUTF8) |
1103 | op->flags |= F_UTF8; | |
8408647d WF |
1104 | #else |
1105 | tp->c_iflag = 0; | |
1106 | #endif | |
9c62a232 DJ |
1107 | tp->c_lflag = 0; |
1108 | tp->c_oflag &= OPOST | ONLCR; | |
70bedfa1 | 1109 | |
1683f6bf | 1110 | if ((op->flags & F_KEEPCFLAGS) == 0) |
70bedfa1 KZ |
1111 | tp->c_cflag = CS8 | HUPCL | CREAD | (tp->c_cflag & CLOCAL); |
1112 | ||
53d55042 SK |
1113 | /* |
1114 | * Note that the speed is stored in the c_cflag termios field, so we have | |
70bedfa1 KZ |
1115 | * set the speed always when the cflag se reseted. |
1116 | */ | |
1117 | cfsetispeed(tp, ispeed); | |
1118 | cfsetospeed(tp, ospeed); | |
1119 | ||
ef264c83 KZ |
1120 | /* The default is to follow setting from kernel, but it's possible |
1121 | * to explicitly remove/add CLOCAL flag by -L[=<mode>]*/ | |
1122 | switch (op->clocal) { | |
1123 | case CLOCAL_MODE_ALWAYS: | |
1124 | tp->c_cflag |= CLOCAL; /* -L or -L=always */ | |
1125 | break; | |
1126 | case CLOCAL_MODE_NEVER: | |
1127 | tp->c_cflag &= ~CLOCAL; /* -L=never */ | |
1128 | break; | |
1129 | case CLOCAL_MODE_AUTO: /* -L=auto */ | |
1130 | break; | |
1131 | } | |
1132 | ||
30e8b186 | 1133 | #ifdef HAVE_STRUCT_TERMIOS_C_LINE |
70bedfa1 | 1134 | tp->c_line = 0; |
1961482a | 1135 | #endif |
70bedfa1 KZ |
1136 | tp->c_cc[VMIN] = 1; |
1137 | tp->c_cc[VTIME] = 0; | |
7eda085c | 1138 | |
1683f6bf DWF |
1139 | /* Check for terminal size and if not found set default */ |
1140 | if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == 0) { | |
1141 | int set = 0; | |
1142 | if (ws.ws_row == 0) { | |
1143 | ws.ws_row = 24; | |
1144 | set++; | |
1145 | } | |
1146 | if (ws.ws_col == 0) { | |
1147 | ws.ws_col = 80; | |
1148 | set++; | |
1149 | } | |
efcf26f4 KZ |
1150 | if (ioctl(STDIN_FILENO, TIOCSWINSZ, &ws)) |
1151 | debug("TIOCSWINSZ ioctl failed\n"); | |
1683f6bf DWF |
1152 | } |
1153 | ||
53d55042 | 1154 | /* Optionally enable hardware flow control. */ |
7eda085c | 1155 | #ifdef CRTSCTS |
70bedfa1 KZ |
1156 | if (op->flags & F_RTSCTS) |
1157 | tp->c_cflag |= CRTSCTS; | |
7eda085c KZ |
1158 | #endif |
1159 | ||
53d55042 | 1160 | tcsetattr(STDIN_FILENO, TCSANOW, tp); |
fd6b7a7f | 1161 | |
53d55042 SK |
1162 | /* Go to blocking input even in local mode. */ |
1163 | fcntl(STDIN_FILENO, F_SETFL, | |
1164 | fcntl(STDIN_FILENO, F_GETFL, 0) & ~O_NONBLOCK); | |
fd6b7a7f | 1165 | |
70bedfa1 | 1166 | debug("term_io 2\n"); |
6dbe3af9 KZ |
1167 | } |
1168 | ||
0da025da WF |
1169 | /* Reset virtual console on stdin to its defaults */ |
1170 | static void reset_vc(const struct options *op, struct termios *tp) | |
1171 | { | |
879a7ab4 KZ |
1172 | int fl = 0; |
1173 | ||
1174 | fl |= (op->flags & F_KEEPCFLAGS) == 0 ? 0 : UL_TTY_KEEPCFLAGS; | |
1175 | fl |= (op->flags & F_UTF8) == 0 ? 0 : UL_TTY_UTF8; | |
1176 | ||
1177 | reset_virtual_console(tp, fl); | |
0da025da | 1178 | |
0da025da | 1179 | if (tcsetattr(STDIN_FILENO, TCSADRAIN, tp)) |
8c219bf4 | 1180 | log_warn(_("setting terminal attributes failed: %m")); |
0da025da WF |
1181 | } |
1182 | ||
53d55042 | 1183 | /* Extract baud rate from modem status message. */ |
bde20e1b | 1184 | static void auto_baud(struct termios *tp) |
6dbe3af9 | 1185 | { |
bde20e1b | 1186 | speed_t speed; |
53d55042 | 1187 | int vmin; |
70bedfa1 | 1188 | unsigned iflag; |
53d55042 SK |
1189 | char buf[BUFSIZ]; |
1190 | char *bp; | |
1191 | int nread; | |
70bedfa1 KZ |
1192 | |
1193 | /* | |
1194 | * This works only if the modem produces its status code AFTER raising | |
1195 | * the DCD line, and if the computer is fast enough to set the proper | |
1196 | * baud rate before the message has gone by. We expect a message of the | |
1197 | * following format: | |
1198 | * | |
1199 | * <junk><number><junk> | |
1200 | * | |
1201 | * The number is interpreted as the baud rate of the incoming call. If the | |
1202 | * modem does not tell us the baud rate within one second, we will keep | |
1203 | * using the current baud rate. It is advisable to enable BREAK | |
1204 | * processing (comma-separated list of baud rates) if the processing of | |
1205 | * modem status messages is enabled. | |
1206 | */ | |
1207 | ||
1208 | /* | |
1209 | * Use 7-bit characters, don't block if input queue is empty. Errors will | |
53d55042 | 1210 | * be dealt with later on. |
70bedfa1 | 1211 | */ |
70bedfa1 | 1212 | iflag = tp->c_iflag; |
53d55042 SK |
1213 | /* Enable 8th-bit stripping. */ |
1214 | tp->c_iflag |= ISTRIP; | |
70bedfa1 | 1215 | vmin = tp->c_cc[VMIN]; |
53d55042 SK |
1216 | /* Do not block when queue is empty. */ |
1217 | tp->c_cc[VMIN] = 0; | |
70bedfa1 KZ |
1218 | tcsetattr(STDIN_FILENO, TCSANOW, tp); |
1219 | ||
1220 | /* | |
1221 | * Wait for a while, then read everything the modem has said so far and | |
1222 | * try to extract the speed of the dial-in call. | |
1223 | */ | |
53d55042 | 1224 | sleep(1); |
70bedfa1 KZ |
1225 | if ((nread = read(STDIN_FILENO, buf, sizeof(buf) - 1)) > 0) { |
1226 | buf[nread] = '\0'; | |
53d55042 | 1227 | for (bp = buf; bp < buf + nread; bp++) |
70bedfa1 KZ |
1228 | if (isascii(*bp) && isdigit(*bp)) { |
1229 | if ((speed = bcode(bp))) { | |
1230 | cfsetispeed(tp, speed); | |
1231 | cfsetospeed(tp, speed); | |
1232 | } | |
1233 | break; | |
1234 | } | |
6dbe3af9 | 1235 | } |
6dbe3af9 | 1236 | |
53d55042 | 1237 | /* Restore terminal settings. Errors will be dealt with later on. */ |
70bedfa1 KZ |
1238 | tp->c_iflag = iflag; |
1239 | tp->c_cc[VMIN] = vmin; | |
53d55042 | 1240 | tcsetattr(STDIN_FILENO, TCSANOW, tp); |
6dbe3af9 KZ |
1241 | } |
1242 | ||
2448f336 KZ |
1243 | static char *xgethostname(void) |
1244 | { | |
1245 | char *name; | |
1246 | size_t sz = get_hostname_max() + 1; | |
1247 | ||
1248 | name = malloc(sizeof(char) * sz); | |
1249 | if (!name) | |
1250 | log_err(_("failed to allocate memory: %m")); | |
1251 | ||
8362545b KZ |
1252 | if (gethostname(name, sz) != 0) { |
1253 | free(name); | |
2448f336 | 1254 | return NULL; |
8362545b | 1255 | } |
2448f336 KZ |
1256 | name[sz - 1] = '\0'; |
1257 | return name; | |
1258 | } | |
1259 | ||
1260 | static char *xgetdomainname(void) | |
1261 | { | |
1262 | #ifdef HAVE_GETDOMAINNAME | |
1263 | char *name; | |
1264 | size_t sz = get_hostname_max() + 1; | |
1265 | ||
1266 | name = malloc(sizeof(char) * sz); | |
1267 | if (!name) | |
1268 | log_err(_("failed to allocate memory: %m")); | |
1269 | ||
8362545b KZ |
1270 | if (getdomainname(name, sz) != 0) { |
1271 | free(name); | |
2448f336 | 1272 | return NULL; |
8362545b | 1273 | } |
2448f336 KZ |
1274 | name[sz - 1] = '\0'; |
1275 | return name; | |
1276 | #endif | |
1277 | return NULL; | |
1278 | } | |
1279 | ||
53d55042 | 1280 | /* Show login prompt, optionally preceded by /etc/issue contents. */ |
bde20e1b | 1281 | static void do_prompt(struct options *op, struct termios *tp) |
6dbe3af9 KZ |
1282 | { |
1283 | #ifdef ISSUE | |
53d55042 | 1284 | FILE *fd; |
53d55042 | 1285 | #endif /* ISSUE */ |
6dbe3af9 | 1286 | |
e85281a8 DWF |
1287 | if ((op->flags & F_NONL) == 0) { |
1288 | /* Issue not in use, start with a new line. */ | |
1289 | write_all(STDOUT_FILENO, "\r\n", 2); | |
1290 | } | |
3aa6b68f | 1291 | |
53d55042 | 1292 | #ifdef ISSUE |
70bedfa1 | 1293 | if ((op->flags & F_ISSUE) && (fd = fopen(op->issue, "r"))) { |
1683f6bf | 1294 | int c, oflag = tp->c_oflag; /* Save current setting. */ |
3aa6b68f | 1295 | |
1683f6bf DWF |
1296 | if ((op->flags & F_VCONSOLE) == 0) { |
1297 | /* Map new line in output to carriage return & new line. */ | |
1298 | tp->c_oflag |= (ONLCR | OPOST); | |
1299 | tcsetattr(STDIN_FILENO, TCSADRAIN, tp); | |
1300 | } | |
70bedfa1 KZ |
1301 | |
1302 | while ((c = getc(fd)) != EOF) { | |
729def03 | 1303 | if (c == '\\') |
2b945eda | 1304 | output_special_char(getc(fd), op, tp, fd); |
729def03 | 1305 | else |
763d7a87 | 1306 | putchar(c); |
70bedfa1 KZ |
1307 | } |
1308 | fflush(stdout); | |
6dbe3af9 | 1309 | |
1683f6bf DWF |
1310 | if ((op->flags & F_VCONSOLE) == 0) { |
1311 | /* Restore settings. */ | |
1312 | tp->c_oflag = oflag; | |
1313 | /* Wait till output is gone. */ | |
1314 | tcsetattr(STDIN_FILENO, TCSADRAIN, tp); | |
1315 | } | |
53d55042 | 1316 | fclose(fd); |
6dbe3af9 | 1317 | } |
eb8e1f9f WF |
1318 | #endif /* ISSUE */ |
1319 | if (op->flags & F_LOGINPAUSE) { | |
8c219bf4 | 1320 | puts(_("[press ENTER to login]")); |
eb8e1f9f WF |
1321 | getc(stdin); |
1322 | } | |
1323 | #ifdef KDGKBLED | |
36601b23 KZ |
1324 | if (!(op->flags & F_NOHINTS) && !op->autolog && |
1325 | (op->flags & F_VCONSOLE)) { | |
a694957a KZ |
1326 | int kb = 0; |
1327 | ||
eb8e1f9f | 1328 | if (ioctl(STDIN_FILENO, KDGKBLED, &kb) == 0) { |
a694957a KZ |
1329 | char hint[256] = { '\0' }; |
1330 | int nl = 0; | |
a694957a | 1331 | |
01c5b787 | 1332 | if (access(_PATH_NUMLOCK_ON, F_OK) == 0) |
a694957a KZ |
1333 | nl = 1; |
1334 | ||
1335 | if (nl && (kb & 0x02) == 0) | |
1336 | append(hint, sizeof(hint), NULL, _("Num Lock off")); | |
1337 | ||
1338 | else if (nl == 0 && (kb & 2) && (kb & 0x20) == 0) | |
1339 | append(hint, sizeof(hint), NULL, _("Num Lock on")); | |
1340 | ||
1341 | if ((kb & 0x04) && (kb & 0x40) == 0) | |
1342 | append(hint, sizeof(hint), ", ", _("Caps Lock on")); | |
1343 | ||
1344 | if ((kb & 0x01) && (kb & 0x10) == 0) | |
1345 | append(hint, sizeof(hint), ", ", _("Scroll Lock on")); | |
1346 | ||
1347 | if (*hint) | |
1348 | printf(_("Hint: %s\n\n"), hint); | |
eb8e1f9f WF |
1349 | } |
1350 | } | |
1351 | #endif /* KDGKBLED */ | |
e85281a8 | 1352 | if ((op->flags & F_NOHOSTNAME) == 0) { |
2448f336 KZ |
1353 | char *hn = xgethostname(); |
1354 | ||
1355 | if (hn) { | |
e85281a8 | 1356 | char *dot = strchr(hn, '.'); |
74b3df85 SK |
1357 | char *cn = hn; |
1358 | struct addrinfo *res = NULL; | |
e85281a8 | 1359 | |
e85281a8 DWF |
1360 | if ((op->flags & F_LONGHNAME) == 0) { |
1361 | if (dot) | |
1362 | *dot = '\0'; | |
74b3df85 SK |
1363 | |
1364 | } else if (dot == NULL) { | |
1365 | struct addrinfo hints; | |
1366 | ||
1367 | memset(&hints, 0, sizeof(hints)); | |
1368 | hints.ai_flags = AI_CANONNAME; | |
1369 | ||
1370 | if (!getaddrinfo(hn, NULL, &hints, &res) | |
1371 | && res && res->ai_canonname) | |
1372 | cn = res->ai_canonname; | |
1373 | } | |
1374 | ||
1375 | write_all(STDOUT_FILENO, cn, strlen(cn)); | |
e85281a8 | 1376 | write_all(STDOUT_FILENO, " ", 1); |
74b3df85 SK |
1377 | |
1378 | if (res) | |
1379 | freeaddrinfo(res); | |
2448f336 | 1380 | free(hn); |
e85281a8 | 1381 | } |
70bedfa1 | 1382 | } |
933956cb | 1383 | if (!op->autolog) { |
eb8e1f9f WF |
1384 | /* Always show login prompt. */ |
1385 | write_all(STDOUT_FILENO, LOGIN, sizeof(LOGIN) - 1); | |
1386 | } | |
6dbe3af9 KZ |
1387 | } |
1388 | ||
53d55042 | 1389 | /* Select next baud rate. */ |
bde20e1b | 1390 | static void next_speed(struct options *op, struct termios *tp) |
6dbe3af9 | 1391 | { |
70bedfa1 KZ |
1392 | static int baud_index = -1; |
1393 | ||
1394 | if (baud_index == -1) | |
1395 | /* | |
53d55042 | 1396 | * If the F_KEEPSPEED flags is set then the FIRST_SPEED is not |
70bedfa1 KZ |
1397 | * tested yet (see termio_init()). |
1398 | */ | |
53d55042 SK |
1399 | baud_index = |
1400 | (op->flags & F_KEEPSPEED) ? FIRST_SPEED : 1 % op->numspeed; | |
70bedfa1 KZ |
1401 | else |
1402 | baud_index = (baud_index + 1) % op->numspeed; | |
1403 | ||
1404 | cfsetispeed(tp, op->speeds[baud_index]); | |
1405 | cfsetospeed(tp, op->speeds[baud_index]); | |
53d55042 | 1406 | tcsetattr(STDIN_FILENO, TCSANOW, tp); |
6dbe3af9 KZ |
1407 | } |
1408 | ||
53d55042 | 1409 | /* Get user name, establish parity, speed, erase, kill & eol. */ |
bde20e1b | 1410 | static char *get_logname(struct options *op, struct termios *tp, struct chardata *cp) |
6dbe3af9 | 1411 | { |
70bedfa1 | 1412 | static char logname[BUFSIZ]; |
53d55042 SK |
1413 | char *bp; |
1414 | char c; /* input character, full eight bits */ | |
1415 | char ascval; /* low 7 bits of input character */ | |
1683f6bf | 1416 | int eightbit; |
53d55042 SK |
1417 | static char *erase[] = { /* backspace-space-backspace */ |
1418 | "\010\040\010", /* space parity */ | |
1419 | "\010\040\010", /* odd parity */ | |
1420 | "\210\240\210", /* even parity */ | |
1421 | "\210\240\210", /* no parity */ | |
70bedfa1 KZ |
1422 | }; |
1423 | ||
1424 | /* Initialize kill, erase, parity etc. (also after switching speeds). */ | |
f5664477 | 1425 | INIT_CHARDATA(cp); |
70bedfa1 | 1426 | |
53d55042 SK |
1427 | /* |
1428 | * Flush pending input (especially important after parsing or switching | |
1429 | * the baud rate). | |
1430 | */ | |
1683f6bf DWF |
1431 | if ((op->flags & F_VCONSOLE) == 0) |
1432 | sleep(1); | |
53d55042 | 1433 | tcflush(STDIN_FILENO, TCIFLUSH); |
70bedfa1 | 1434 | |
1683f6bf DWF |
1435 | eightbit = (op->flags & F_EIGHTBITS); |
1436 | bp = logname; | |
1437 | *bp = '\0'; | |
1438 | ||
1439 | while (*logname == '\0') { | |
1440 | ||
1441 | /* Write issue file and prompt */ | |
70bedfa1 KZ |
1442 | do_prompt(op, tp); |
1443 | ||
1683f6bf DWF |
1444 | cp->eol = '\0'; |
1445 | ||
1446 | /* Read name, watch for break and end-of-line. */ | |
1447 | while (cp->eol == '\0') { | |
1448 | ||
cb872ac9 KZ |
1449 | char key; |
1450 | ||
763d7a87 | 1451 | if (read(STDIN_FILENO, &c, 1) < 1) { |
1683f6bf | 1452 | |
714cff30 KZ |
1453 | /* The terminal could be open with O_NONBLOCK when |
1454 | * -L (force CLOCAL) is specified... */ | |
1683f6bf | 1455 | if (errno == EINTR || errno == EAGAIN) { |
714cff30 | 1456 | usleep(250000); |
1683f6bf DWF |
1457 | continue; |
1458 | } | |
1459 | switch (errno) { | |
1460 | case 0: | |
1461 | case EIO: | |
1462 | case ESRCH: | |
1463 | case EINVAL: | |
1464 | case ENOENT: | |
1465 | break; | |
1466 | default: | |
1467 | log_err(_("%s: read: %m"), op->tty); | |
1468 | } | |
70bedfa1 | 1469 | } |
1683f6bf | 1470 | |
70bedfa1 | 1471 | /* Do parity bit handling. */ |
1683f6bf | 1472 | if (eightbit) |
70bedfa1 | 1473 | ascval = c; |
1683f6bf DWF |
1474 | else if (c != (ascval = (c & 0177))) { |
1475 | uint32_t bits; /* # of "1" bits per character */ | |
1476 | uint32_t mask; /* mask with 1 bit up */ | |
1477 | for (bits = 1, mask = 1; mask & 0177; mask <<= 1) { | |
70bedfa1 | 1478 | if (mask & ascval) |
53d55042 | 1479 | bits++; |
1683f6bf | 1480 | } |
70bedfa1 KZ |
1481 | cp->parity |= ((bits & 1) ? 1 : 2); |
1482 | } | |
1683f6bf | 1483 | |
cb872ac9 KZ |
1484 | if (op->killchars && strchr(op->killchars, ascval)) |
1485 | key = CTL('U'); | |
1486 | else if (op->erasechars && strchr(op->erasechars, ascval)) | |
1487 | key = DEL; | |
1488 | else | |
1489 | key = ascval; | |
1490 | ||
70bedfa1 | 1491 | /* Do erase, kill and end-of-line processing. */ |
cb872ac9 | 1492 | switch (key) { |
1683f6bf DWF |
1493 | case 0: |
1494 | *bp = 0; | |
1495 | if (op->numspeed > 1) | |
4a9b7543 | 1496 | return NULL; |
1683f6bf | 1497 | break; |
70bedfa1 KZ |
1498 | case CR: |
1499 | case NL: | |
1683f6bf DWF |
1500 | *bp = 0; /* terminate logname */ |
1501 | cp->eol = ascval; /* set end-of-line char */ | |
70bedfa1 KZ |
1502 | break; |
1503 | case BS: | |
1504 | case DEL: | |
1683f6bf | 1505 | cp->erase = ascval; /* set erase character */ |
70bedfa1 | 1506 | if (bp > logname) { |
b9261127 | 1507 | if ((tp->c_lflag & ECHO) == 0) |
1683f6bf | 1508 | write_all(1, erase[cp->parity], 3); |
70bedfa1 KZ |
1509 | bp--; |
1510 | } | |
1511 | break; | |
1512 | case CTL('U'): | |
1683f6bf | 1513 | cp->kill = ascval; /* set kill character */ |
70bedfa1 | 1514 | while (bp > logname) { |
b9261127 | 1515 | if ((tp->c_lflag & ECHO) == 0) |
1683f6bf | 1516 | write_all(1, erase[cp->parity], 3); |
70bedfa1 KZ |
1517 | bp--; |
1518 | } | |
1519 | break; | |
1520 | case CTL('D'): | |
1521 | exit(EXIT_SUCCESS); | |
1522 | default: | |
1683f6bf DWF |
1523 | if (!isascii(ascval) || !isprint(ascval)) |
1524 | break; | |
1525 | if ((size_t)(bp - logname) >= sizeof(logname) - 1) | |
bde20e1b | 1526 | log_err(_("%s: input overrun"), op->tty); |
b9261127 | 1527 | if ((tp->c_lflag & ECHO) == 0) |
1683f6bf DWF |
1528 | write_all(1, &c, 1); /* echo the character */ |
1529 | *bp++ = ascval; /* and store it */ | |
70bedfa1 KZ |
1530 | break; |
1531 | } | |
6dbe3af9 | 1532 | } |
6dbe3af9 | 1533 | } |
1683f6bf DWF |
1534 | #ifdef HAVE_WIDECHAR |
1535 | if ((op->flags & (F_EIGHTBITS|F_UTF8)) == (F_EIGHTBITS|F_UTF8)) { | |
1536 | /* Check out UTF-8 multibyte characters */ | |
1537 | ssize_t len; | |
1538 | wchar_t *wcs, *wcp; | |
1539 | ||
1540 | len = mbstowcs((wchar_t *)0, logname, 0); | |
1541 | if (len < 0) | |
8c219bf4 | 1542 | log_err(_("%s: invalid character conversion for login name"), op->tty); |
1683f6bf | 1543 | |
ca8e91a4 KZ |
1544 | wcs = (wchar_t *) malloc((len + 1) * sizeof(wchar_t)); |
1545 | if (!wcs) | |
1546 | log_err(_("failed to allocate memory: %m")); | |
1683f6bf DWF |
1547 | |
1548 | len = mbstowcs(wcs, logname, len + 1); | |
1549 | if (len < 0) | |
8c219bf4 | 1550 | log_err(_("%s: invalid character conversion for login name"), op->tty); |
1683f6bf DWF |
1551 | |
1552 | wcp = wcs; | |
1553 | while (*wcp) { | |
1554 | const wint_t wc = *wcp++; | |
1555 | if (!iswprint(wc)) | |
8c219bf4 | 1556 | log_err(_("%s: invalid character 0x%x in login name"), op->tty, wc); |
1683f6bf DWF |
1557 | } |
1558 | free(wcs); | |
1559 | } else | |
1560 | #endif | |
1561 | if ((op->flags & F_LCUC) && (cp->capslock = caps_lock(logname))) { | |
1562 | ||
1563 | /* Handle names with upper case and no lower case. */ | |
70bedfa1 KZ |
1564 | for (bp = logname; *bp; bp++) |
1565 | if (isupper(*bp)) | |
1683f6bf DWF |
1566 | *bp = tolower(*bp); /* map name to lower case */ |
1567 | } | |
1568 | ||
70bedfa1 | 1569 | return logname; |
6dbe3af9 KZ |
1570 | } |
1571 | ||
53d55042 | 1572 | /* Set the final tty mode bits. */ |
bde20e1b | 1573 | static void termio_final(struct options *op, struct termios *tp, struct chardata *cp) |
6dbe3af9 | 1574 | { |
70bedfa1 | 1575 | /* General terminal-independent stuff. */ |
53d55042 SK |
1576 | |
1577 | /* 2-way flow control */ | |
1578 | tp->c_iflag |= IXON | IXOFF; | |
1579 | tp->c_lflag |= ICANON | ISIG | ECHO | ECHOE | ECHOK | ECHOKE; | |
1580 | /* no longer| ECHOCTL | ECHOPRT */ | |
70bedfa1 KZ |
1581 | tp->c_oflag |= OPOST; |
1582 | /* tp->c_cflag = 0; */ | |
53d55042 SK |
1583 | tp->c_cc[VINTR] = DEF_INTR; |
1584 | tp->c_cc[VQUIT] = DEF_QUIT; | |
1585 | tp->c_cc[VEOF] = DEF_EOF; | |
70bedfa1 | 1586 | tp->c_cc[VEOL] = DEF_EOL; |
fd6b7a7f | 1587 | #ifdef __linux__ |
53d55042 | 1588 | tp->c_cc[VSWTC] = DEF_SWITCH; |
1961482a | 1589 | #elif defined(VSWTCH) |
53d55042 SK |
1590 | tp->c_cc[VSWTCH] = DEF_SWITCH; |
1591 | #endif /* __linux__ */ | |
6dbe3af9 | 1592 | |
70bedfa1 KZ |
1593 | /* Account for special characters seen in input. */ |
1594 | if (cp->eol == CR) { | |
53d55042 SK |
1595 | tp->c_iflag |= ICRNL; |
1596 | tp->c_oflag |= ONLCR; | |
70bedfa1 | 1597 | } |
53d55042 SK |
1598 | tp->c_cc[VERASE] = cp->erase; |
1599 | tp->c_cc[VKILL] = cp->kill; | |
70bedfa1 KZ |
1600 | |
1601 | /* Account for the presence or absence of parity bits in input. */ | |
1602 | switch (cp->parity) { | |
53d55042 SK |
1603 | case 0: |
1604 | /* space (always 0) parity */ | |
1605 | break; | |
1606 | case 1: | |
1607 | /* odd parity */ | |
1608 | tp->c_cflag |= PARODD; | |
1609 | /* do not break */ | |
1610 | case 2: | |
1611 | /* even parity */ | |
1612 | tp->c_cflag |= PARENB; | |
1613 | tp->c_iflag |= INPCK | ISTRIP; | |
1614 | /* do not break */ | |
1615 | case (1 | 2): | |
1616 | /* no parity bit */ | |
1617 | tp->c_cflag &= ~CSIZE; | |
1618 | tp->c_cflag |= CS7; | |
1619 | break; | |
70bedfa1 KZ |
1620 | } |
1621 | /* Account for upper case without lower case. */ | |
1622 | if (cp->capslock) { | |
ee519041 | 1623 | #ifdef IUCLC |
70bedfa1 | 1624 | tp->c_iflag |= IUCLC; |
ee519041 | 1625 | #endif |
b75c8134 | 1626 | #ifdef XCASE |
70bedfa1 | 1627 | tp->c_lflag |= XCASE; |
1961482a | 1628 | #endif |
ee519041 | 1629 | #ifdef OLCUC |
70bedfa1 | 1630 | tp->c_oflag |= OLCUC; |
ee519041 | 1631 | #endif |
70bedfa1 | 1632 | } |
53d55042 | 1633 | /* Optionally enable hardware flow control. */ |
6dbe3af9 | 1634 | #ifdef CRTSCTS |
70bedfa1 KZ |
1635 | if (op->flags & F_RTSCTS) |
1636 | tp->c_cflag |= CRTSCTS; | |
6dbe3af9 KZ |
1637 | #endif |
1638 | ||
53d55042 | 1639 | /* Finally, make the new settings effective. */ |
70bedfa1 | 1640 | if (tcsetattr(STDIN_FILENO, TCSANOW, tp) < 0) |
8c219bf4 | 1641 | log_err(_("%s: failed to set terminal attributes: %m"), op->tty); |
6dbe3af9 KZ |
1642 | } |
1643 | ||
53d55042 SK |
1644 | /* |
1645 | * String contains upper case without lower case. | |
1646 | * http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=52940 | |
1647 | * http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=156242 | |
1648 | */ | |
bde20e1b | 1649 | static int caps_lock(char *s) |
6dbe3af9 | 1650 | { |
53d55042 | 1651 | int capslock; |
70bedfa1 KZ |
1652 | |
1653 | for (capslock = 0; *s; s++) { | |
1654 | if (islower(*s)) | |
1655 | return EXIT_SUCCESS; | |
1656 | if (capslock == 0) | |
1657 | capslock = isupper(*s); | |
1658 | } | |
1659 | return capslock; | |
6dbe3af9 KZ |
1660 | } |
1661 | ||
53d55042 | 1662 | /* Convert speed string to speed code; return 0 on failure. */ |
bde20e1b | 1663 | static speed_t bcode(char *s) |
6dbe3af9 | 1664 | { |
1a204cd2 | 1665 | const struct Speedtab *sp; |
53d55042 | 1666 | long speed = atol(s); |
6dbe3af9 | 1667 | |
70bedfa1 KZ |
1668 | for (sp = speedtab; sp->speed; sp++) |
1669 | if (sp->speed == speed) | |
1670 | return sp->code; | |
1671 | return 0; | |
6dbe3af9 KZ |
1672 | } |
1673 | ||
7d368556 | 1674 | static void __attribute__ ((__noreturn__)) usage(FILE *out) |
6dbe3af9 | 1675 | { |
7d368556 | 1676 | fputs(USAGE_HEADER, out); |
4cfda3dc | 1677 | fprintf(out, _(" %1$s [options] line [baud_rate,...] [termtype]\n" |
7d368556 SK |
1678 | " %1$s [options] baud_rate,... line [termtype]\n"), program_invocation_short_name); |
1679 | fputs(USAGE_OPTIONS, out); | |
1680 | fputs(_(" -8, --8bits assume 8-bit tty\n"), out); | |
1681 | fputs(_(" -a, --autologin <user> login the specified user automatically\n"), out); | |
1682 | fputs(_(" -c, --noreset do not reset control mode\n"), out); | |
1505a0b2 | 1683 | fputs(_(" -E, --remote use -r <hostname> for login(1)\n"), out); |
7d368556 SK |
1684 | fputs(_(" -f, --issue-file <file> display issue file\n"), out); |
1685 | fputs(_(" -h, --flow-control enable hardware flow control\n"), out); | |
1686 | fputs(_(" -H, --host <hostname> specify login host\n"), out); | |
1687 | fputs(_(" -i, --noissue do not display issue file\n"), out); | |
1688 | fputs(_(" -I, --init-string <string> set init string\n"), out); | |
1689 | fputs(_(" -l, --login-program <file> specify login program\n"), out); | |
ef264c83 | 1690 | fputs(_(" -L, --local-line[=<mode>] cotrol local line flag\n"), out); |
7d368556 SK |
1691 | fputs(_(" -m, --extract-baud extract baud rate during connect\n"), out); |
1692 | fputs(_(" -n, --skip-login do not prompt for login\n"), out); | |
1693 | fputs(_(" -o, --login-options <opts> options that are passed to login\n"), out); | |
1694 | fputs(_(" -p, --loginpause wait for any key before the login\n"), out); | |
4b856ee4 | 1695 | fputs(_(" -r, --chroot <dir> change root to the directory\n"), out); |
7d368556 SK |
1696 | fputs(_(" -R, --hangup do virtually hangup on the tty\n"), out); |
1697 | fputs(_(" -s, --keep-baud try to keep baud rate after break\n"), out); | |
1698 | fputs(_(" -t, --timeout <number> login process timeout\n"), out); | |
1699 | fputs(_(" -U, --detect-case detect uppercase terminal\n"), out); | |
1700 | fputs(_(" -w, --wait-cr wait carriage-return\n"), out); | |
1701 | fputs(_(" --noclear do not clear the screen before prompt\n"), out); | |
1702 | fputs(_(" --nohints do not print hints\n"), out); | |
1703 | fputs(_(" --nonewline do not print a newline before issue\n"), out); | |
1704 | fputs(_(" --no-hostname no hostname at all will be shown\n"), out); | |
1705 | fputs(_(" --long-hostname show full qualified hostname\n"), out); | |
1706 | fputs(_(" --erase-chars <string> additional backspace chars\n"), out); | |
1707 | fputs(_(" --kill-chars <string> additional kill chars\n"), out); | |
86ad1432 SK |
1708 | fputs(_(" --help display this help and exit\n"), out); |
1709 | fputs(_(" --version output version information and exit\n"), out); | |
7d368556 | 1710 | fprintf(out, USAGE_MAN_TAIL("agetty(8)")); |
70bedfa1 KZ |
1711 | |
1712 | exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS); | |
6dbe3af9 KZ |
1713 | } |
1714 | ||
bde20e1b WF |
1715 | /* |
1716 | * Helper function reports errors to console or syslog. | |
1717 | * Will be used by log_err() and log_warn() therefore | |
1718 | * it takes a format as well as va_list. | |
1719 | */ | |
6dbe3af9 KZ |
1720 | #define str2cpy(b,s1,s2) strcat(strcpy(b,s1),s2) |
1721 | ||
bde20e1b | 1722 | static void dolog(int priority, const char *fmt, va_list ap) |
53d55042 | 1723 | { |
6dbe3af9 | 1724 | #ifndef USE_SYSLOG |
53d55042 | 1725 | int fd; |
6dbe3af9 | 1726 | #endif |
53d55042 SK |
1727 | char buf[BUFSIZ]; |
1728 | char *bp; | |
6dbe3af9 | 1729 | |
70bedfa1 KZ |
1730 | /* |
1731 | * If the diagnostic is reported via syslog(3), the process name is | |
1732 | * automatically prepended to the message. If we write directly to | |
1733 | * /dev/console, we must prepend the process name ourselves. | |
1734 | */ | |
6dbe3af9 | 1735 | #ifdef USE_SYSLOG |
70bedfa1 KZ |
1736 | buf[0] = '\0'; |
1737 | bp = buf; | |
6dbe3af9 | 1738 | #else |
53d55042 | 1739 | str2cpy(buf, program_invocation_short_name, ": "); |
70bedfa1 | 1740 | bp = buf + strlen(buf); |
53d55042 | 1741 | #endif /* USE_SYSLOG */ |
763d7a87 | 1742 | vsnprintf(bp, sizeof(buf)-strlen(buf), fmt, ap); |
6dbe3af9 | 1743 | |
70bedfa1 KZ |
1744 | /* |
1745 | * Write the diagnostic directly to /dev/console if we do not use the | |
1746 | * syslog(3) facility. | |
1747 | */ | |
6dbe3af9 | 1748 | #ifdef USE_SYSLOG |
53d55042 | 1749 | openlog(program_invocation_short_name, LOG_PID, LOG_AUTHPRIV); |
bde20e1b | 1750 | syslog(priority, "%s", buf); |
70bedfa1 | 1751 | closelog(); |
6dbe3af9 | 1752 | #else |
70bedfa1 | 1753 | /* Terminate with CR-LF since the console mode is unknown. */ |
53d55042 | 1754 | strcat(bp, "\r\n"); |
70bedfa1 | 1755 | if ((fd = open("/dev/console", 1)) >= 0) { |
729def03 | 1756 | write_all(fd, buf, strlen(buf)); |
53d55042 | 1757 | close(fd); |
70bedfa1 | 1758 | } |
53d55042 | 1759 | #endif /* USE_SYSLOG */ |
bde20e1b WF |
1760 | } |
1761 | ||
1762 | static void log_err(const char *fmt, ...) | |
1763 | { | |
1764 | va_list ap; | |
1765 | ||
1766 | va_start(ap, fmt); | |
1767 | dolog(LOG_ERR, fmt, ap); | |
1768 | va_end(ap); | |
1769 | ||
53d55042 SK |
1770 | /* Be kind to init(8). */ |
1771 | sleep(10); | |
70bedfa1 | 1772 | exit(EXIT_FAILURE); |
6dbe3af9 | 1773 | } |
bde20e1b WF |
1774 | |
1775 | static void log_warn(const char *fmt, ...) | |
1776 | { | |
1777 | va_list ap; | |
1778 | ||
1779 | va_start(ap, fmt); | |
1780 | dolog(LOG_WARNING, fmt, ap); | |
1781 | va_end(ap); | |
1782 | } | |
729def03 | 1783 | |
2b945eda KZ |
1784 | static void output_iface_ip(struct ifaddrs *addrs, const char *iface, sa_family_t family) |
1785 | { | |
1786 | if (!iface) | |
1787 | return; | |
1788 | ||
1789 | if (addrs->ifa_name | |
1790 | && strcmp(addrs->ifa_name, iface) == 0 | |
1791 | && addrs->ifa_addr | |
1792 | && addrs->ifa_addr->sa_family == family) { | |
1793 | ||
1794 | void *addr = NULL; | |
1795 | char buff[INET6_ADDRSTRLEN + 1]; | |
1796 | ||
1797 | switch (addrs->ifa_addr->sa_family) { | |
1798 | case AF_INET: | |
1799 | addr = &((struct sockaddr_in *) addrs->ifa_addr)->sin_addr; | |
1800 | break; | |
1801 | case AF_INET6: | |
1802 | addr = &((struct sockaddr_in6 *) addrs->ifa_addr)->sin6_addr; | |
1803 | break; | |
1804 | } | |
1805 | if (addr) { | |
1806 | inet_ntop(addrs->ifa_addr->sa_family, addr, buff, sizeof(buff)); | |
1807 | printf("%s", buff); | |
1808 | } | |
1809 | ||
1810 | } else if (addrs->ifa_next) | |
1811 | output_iface_ip(addrs->ifa_next, iface, family); | |
1812 | } | |
1813 | ||
1814 | static void output_ip(sa_family_t family) | |
1815 | { | |
2448f336 | 1816 | char *host; |
2b945eda KZ |
1817 | struct addrinfo hints, *info = NULL; |
1818 | ||
1819 | memset(&hints, 0, sizeof(hints)); | |
1820 | hints.ai_family = family; | |
1821 | if (family == AF_INET6) | |
1822 | hints.ai_flags = AI_V4MAPPED; | |
1823 | ||
2448f336 KZ |
1824 | host = xgethostname(); |
1825 | if (host && getaddrinfo(host, NULL, &hints, &info) == 0 && info) { | |
2b945eda KZ |
1826 | |
1827 | void *addr = NULL; | |
2b945eda KZ |
1828 | |
1829 | switch (info->ai_family) { | |
1830 | case AF_INET: | |
1831 | addr = &((struct sockaddr_in *) info->ai_addr)->sin_addr; | |
1832 | break; | |
1833 | case AF_INET6: | |
1834 | addr = &((struct sockaddr_in6 *) info->ai_addr)->sin6_addr; | |
1835 | break; | |
1836 | } | |
915c1d99 KZ |
1837 | if (addr) { |
1838 | char buff[INET6_ADDRSTRLEN + 1]; | |
1839 | ||
1840 | inet_ntop(info->ai_family, (void *) addr, buff, sizeof(buff)); | |
1841 | printf("%s", buff); | |
1842 | } | |
2b945eda KZ |
1843 | |
1844 | freeaddrinfo(info); | |
1845 | } | |
2448f336 | 1846 | free(host); |
2b945eda KZ |
1847 | } |
1848 | ||
1849 | /* | |
1850 | * parses \x{argument}, if not argument specified then returns NULL, the @fd | |
1851 | * has to point to one char after the sequence (it means '{'). | |
1852 | */ | |
1853 | static char *get_escape_argument(FILE *fd, char *buf, size_t bufsz) | |
1854 | { | |
1855 | size_t i = 0; | |
1856 | int c = fgetc(fd); | |
1857 | ||
1858 | if (c == EOF || (unsigned char) c != '{') { | |
1859 | ungetc(c, fd); | |
1860 | return NULL; | |
1861 | } | |
1862 | ||
1863 | do { | |
1864 | c = fgetc(fd); | |
1865 | if (c == EOF) | |
1866 | return NULL; | |
1867 | if ((unsigned char) c != '}' && i < bufsz - 1) | |
1868 | buf[i++] = (unsigned char) c; | |
1869 | ||
1870 | } while ((unsigned char) c != '}'); | |
1871 | ||
1872 | buf[i] = '\0'; | |
1873 | return buf; | |
1874 | } | |
1875 | ||
729def03 | 1876 | static void output_special_char(unsigned char c, struct options *op, |
2b945eda | 1877 | struct termios *tp, FILE *fp) |
729def03 WF |
1878 | { |
1879 | struct utsname uts; | |
763d7a87 KZ |
1880 | |
1881 | uname(&uts); | |
3aa6b68f | 1882 | |
729def03 WF |
1883 | switch (c) { |
1884 | case 's': | |
763d7a87 | 1885 | printf("%s", uts.sysname); |
729def03 WF |
1886 | break; |
1887 | case 'n': | |
763d7a87 | 1888 | printf("%s", uts.nodename); |
729def03 WF |
1889 | break; |
1890 | case 'r': | |
763d7a87 | 1891 | printf("%s", uts.release); |
729def03 WF |
1892 | break; |
1893 | case 'v': | |
763d7a87 | 1894 | printf("%s", uts.version); |
729def03 WF |
1895 | break; |
1896 | case 'm': | |
763d7a87 | 1897 | printf("%s", uts.machine); |
729def03 WF |
1898 | break; |
1899 | case 'o': | |
1900 | { | |
2448f336 KZ |
1901 | char *dom = xgetdomainname(); |
1902 | ||
1903 | fputs(dom ? dom : "unknown_domain", stdout); | |
1904 | free(dom); | |
729def03 WF |
1905 | break; |
1906 | } | |
1907 | case 'O': | |
1908 | { | |
2448f336 KZ |
1909 | char *dom = NULL; |
1910 | char *host = xgethostname(); | |
729def03 WF |
1911 | struct addrinfo hints, *info = NULL; |
1912 | ||
1913 | memset(&hints, 0, sizeof(hints)); | |
1914 | hints.ai_flags = AI_CANONNAME; | |
1915 | ||
2448f336 | 1916 | if (host && getaddrinfo(host, NULL, &hints, &info) == 0 && info) { |
729def03 | 1917 | char *canon; |
2448f336 | 1918 | |
729def03 WF |
1919 | if (info->ai_canonname && |
1920 | (canon = strchr(info->ai_canonname, '.'))) | |
1921 | dom = canon + 1; | |
729def03 | 1922 | } |
2448f336 KZ |
1923 | fputs(dom ? dom : "unknown_domain", stdout); |
1924 | if (info) | |
1925 | freeaddrinfo(info); | |
1926 | free(host); | |
729def03 WF |
1927 | break; |
1928 | } | |
1929 | case 'd': | |
1930 | case 't': | |
1931 | { | |
1932 | time_t now; | |
1933 | struct tm *tm; | |
1934 | ||
763d7a87 | 1935 | time(&now); |
729def03 WF |
1936 | tm = localtime(&now); |
1937 | ||
d9201203 KZ |
1938 | if (!tm) |
1939 | break; | |
1940 | ||
729def03 | 1941 | if (c == 'd') /* ISO 8601 */ |
763d7a87 | 1942 | printf("%s %s %d %d", |
729def03 WF |
1943 | nl_langinfo(ABDAY_1 + tm->tm_wday), |
1944 | nl_langinfo(ABMON_1 + tm->tm_mon), | |
1945 | tm->tm_mday, | |
1946 | tm->tm_year < 70 ? tm->tm_year + 2000 : | |
1947 | tm->tm_year + 1900); | |
1948 | else | |
763d7a87 | 1949 | printf("%02d:%02d:%02d", |
729def03 WF |
1950 | tm->tm_hour, tm->tm_min, tm->tm_sec); |
1951 | break; | |
1952 | } | |
1953 | case 'l': | |
763d7a87 | 1954 | printf ("%s", op->tty); |
729def03 WF |
1955 | break; |
1956 | case 'b': | |
1957 | { | |
1958 | const speed_t speed = cfgetispeed(tp); | |
1959 | int i; | |
1960 | ||
1961 | for (i = 0; speedtab[i].speed; i++) { | |
1962 | if (speedtab[i].code == speed) { | |
1963 | printf("%ld", speedtab[i].speed); | |
1964 | break; | |
1965 | } | |
1966 | } | |
1967 | break; | |
1968 | } | |
1969 | case 'u': | |
1970 | case 'U': | |
1971 | { | |
1972 | int users = 0; | |
1973 | struct utmp *ut; | |
1974 | setutent(); | |
1975 | while ((ut = getutent())) | |
1976 | if (ut->ut_type == USER_PROCESS) | |
1977 | users++; | |
1978 | endutent(); | |
729def03 | 1979 | if (c == 'U') |
9e531400 BS |
1980 | printf(P_("%d user", "%d users", users), users); |
1981 | else | |
1982 | printf ("%d ", users); | |
729def03 WF |
1983 | break; |
1984 | } | |
2b945eda KZ |
1985 | case '4': |
1986 | case '6': | |
1987 | { | |
1988 | sa_family_t family = c == '4' ? AF_INET : AF_INET6; | |
1989 | char iface[128]; | |
1990 | ||
1991 | if (get_escape_argument(fp, iface, sizeof(iface))) { /* interface IP */ | |
1992 | struct ifaddrs *addrs; | |
1993 | int status = getifaddrs(&addrs); | |
1994 | if (status != 0) | |
1995 | break; | |
1996 | output_iface_ip(addrs, iface, family); | |
1997 | freeifaddrs(addrs); | |
1998 | } else /* host IP */ | |
1999 | output_ip(family); | |
2000 | break; | |
2001 | } | |
729def03 | 2002 | default: |
763d7a87 | 2003 | putchar(c); |
729def03 WF |
2004 | break; |
2005 | } | |
2006 | } | |
2007 | ||
2008 | static void init_special_char(char* arg, struct options *op) | |
2009 | { | |
2010 | char ch, *p, *q; | |
2011 | int i; | |
2012 | ||
ca8e91a4 KZ |
2013 | op->initstring = malloc(strlen(arg) + 1); |
2014 | if (!op->initstring) | |
2015 | log_err(_("failed to allocate memory: %m")); | |
729def03 WF |
2016 | |
2017 | /* | |
2018 | * Copy optarg into op->initstring decoding \ddd octal | |
2019 | * codes into chars. | |
2020 | */ | |
2021 | q = op->initstring; | |
2022 | p = arg; | |
2023 | while (*p) { | |
2024 | /* The \\ is converted to \ */ | |
2025 | if (*p == '\\') { | |
2026 | p++; | |
2027 | if (*p == '\\') { | |
2028 | ch = '\\'; | |
2029 | p++; | |
2030 | } else { | |
2031 | /* Handle \000 - \177. */ | |
2032 | ch = 0; | |
2033 | for (i = 1; i <= 3; i++) { | |
2034 | if (*p >= '0' && *p <= '7') { | |
2035 | ch <<= 3; | |
2036 | ch += *p - '0'; | |
2037 | p++; | |
2038 | } else { | |
2039 | break; | |
2040 | } | |
2041 | } | |
2042 | } | |
2043 | *q++ = ch; | |
2044 | } else | |
2045 | *q++ = *p++; | |
2046 | } | |
2047 | *q = '\0'; | |
2048 | } | |
eb8e1f9f | 2049 | |
a694957a KZ |
2050 | /* |
2051 | * Appends @str to @dest and if @dest is not empty then use use @sep as a | |
2052 | * separator. The maximal final length of the @dest is @len. | |
2053 | * | |
2054 | * Returns the final @dest length or -1 in case of error. | |
2055 | */ | |
2056 | static ssize_t append(char *dest, size_t len, const char *sep, const char *src) | |
2057 | { | |
2058 | size_t dsz = 0, ssz = 0, sz; | |
2059 | char *p; | |
2060 | ||
2061 | if (!dest || !len || !src) | |
2062 | return -1; | |
2063 | ||
2064 | if (*dest) | |
2065 | dsz = strlen(dest); | |
2066 | if (dsz && sep) | |
2067 | ssz = strlen(sep); | |
2068 | sz = strlen(src); | |
2069 | ||
2070 | if (dsz + ssz + sz + 1 > len) | |
2071 | return -1; | |
2072 | ||
2073 | p = dest + dsz; | |
2074 | if (ssz) { | |
2075 | memcpy(p, sep, ssz); | |
2076 | p += ssz; | |
2077 | } | |
2078 | memcpy(p, src, sz); | |
2079 | *(p + sz) = '\0'; | |
2080 | ||
2081 | return dsz + ssz + sz; | |
2082 | } | |
9aeb66dc | 2083 | |
eb8e1f9f WF |
2084 | /* |
2085 | * Do not allow the user to pass an option as a user name | |
2086 | * To be more safe: Use `--' to make sure the rest is | |
2087 | * interpreted as non-options by the program, if it supports it. | |
2088 | */ | |
9aeb66dc | 2089 | static void check_username(const char* nm) |
eb8e1f9f WF |
2090 | { |
2091 | const char *p = nm; | |
2092 | if (!nm) | |
2093 | goto err; | |
763d7a87 | 2094 | if (strlen(nm) > 42) |
eb8e1f9f | 2095 | goto err; |
763d7a87 | 2096 | while (isspace(*p)) |
eb8e1f9f WF |
2097 | p++; |
2098 | if (*p == '-') | |
2099 | goto err; | |
2100 | return; | |
2101 | err: | |
2102 | errno = EPERM; | |
8c219bf4 | 2103 | log_err(_("checkname failed: %m")); |
eb8e1f9f WF |
2104 | } |
2105 |