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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 | ||
3797cf25 | 466 | if (p == str && sz == 2) { |
9aeb66dc | 467 | /* 'str' contains only '\u' */ |
3797cf25 | 468 | free(old); |
9aeb66dc | 469 | return username; |
3797cf25 | 470 | } |
9aeb66dc KZ |
471 | |
472 | tp = entry = malloc(sz + usz); | |
473 | if (!tp) | |
474 | log_err(_("failed to allocate memory: %m")); | |
475 | ||
476 | if (p != str) { | |
477 | /* copy chars befor \u */ | |
478 | memcpy(tp, str, p - str); | |
479 | tp += p - str; | |
480 | } | |
481 | if (usz) { | |
482 | /* copy username */ | |
483 | memcpy(tp, username, usz); | |
484 | tp += usz; | |
485 | } | |
486 | if (*(p + 2)) | |
487 | /* copy chars after \u + \0 */ | |
488 | memcpy(tp, p + 2, sz - (p - str) - 1); | |
489 | else | |
490 | *tp = '\0'; | |
491 | ||
492 | p = tp; | |
493 | str = entry; | |
494 | free(old); | |
495 | } | |
496 | ||
497 | return entry ? entry : str; | |
498 | } | |
499 | ||
500 | static void login_options_to_argv(char *argv[], int *argc, | |
501 | char *str, char *username) | |
502 | { | |
503 | char *p; | |
504 | int i = *argc; | |
505 | ||
506 | while (str && isspace(*str)) | |
507 | str++; | |
508 | p = str; | |
509 | ||
510 | while (p && *p && i < LOGIN_ARGV_MAX) { | |
511 | if (isspace(*p)) { | |
512 | *p = '\0'; | |
513 | while (isspace(*++p)) | |
514 | ; | |
515 | if (*p) { | |
516 | argv[i++] = replace_u(str, username); | |
517 | str = p; | |
518 | } | |
519 | } else | |
520 | p++; | |
521 | } | |
522 | if (str && *str && i < LOGIN_ARGV_MAX) | |
523 | argv[i++] = replace_u(str, username); | |
524 | *argc = i; | |
6dbe3af9 KZ |
525 | } |
526 | ||
53d55042 | 527 | /* Parse command-line arguments. */ |
bde20e1b | 528 | static void parse_args(int argc, char **argv, struct options *op) |
6dbe3af9 | 529 | { |
53d55042 | 530 | int c; |
70bedfa1 KZ |
531 | |
532 | enum { | |
533 | VERSION_OPTION = CHAR_MAX + 1, | |
36601b23 | 534 | NOHINTS_OPTION, |
e85281a8 DWF |
535 | NOHOSTNAME_OPTION, |
536 | LONGHOSTNAME_OPTION, | |
cb872ac9 KZ |
537 | HELP_OPTION, |
538 | ERASE_CHARS_OPTION, | |
539 | KILL_CHARS_OPTION, | |
70bedfa1 | 540 | }; |
3aa6b68f | 541 | const struct option longopts[] = { |
70bedfa1 | 542 | { "8bits", no_argument, 0, '8' }, |
eb8e1f9f | 543 | { "autologin", required_argument, 0, 'a' }, |
70bedfa1 | 544 | { "noreset", no_argument, 0, 'c' }, |
e85281a8 DWF |
545 | { "chdir", required_argument, 0, 'C' }, |
546 | { "delay", required_argument, 0, 'd' }, | |
01095ae3 | 547 | { "remote", no_argument, 0, 'E' }, |
70bedfa1 KZ |
548 | { "issue-file", required_argument, 0, 'f' }, |
549 | { "flow-control", no_argument, 0, 'h' }, | |
550 | { "host", required_argument, 0, 'H' }, | |
551 | { "noissue", no_argument, 0, 'i' }, | |
552 | { "init-string", required_argument, 0, 'I' }, | |
e85281a8 | 553 | { "noclear", no_argument, 0, 'J' }, |
70bedfa1 | 554 | { "login-program", required_argument, 0, 'l' }, |
ef264c83 | 555 | { "local-line", optional_argument, 0, 'L' }, |
70bedfa1 KZ |
556 | { "extract-baud", no_argument, 0, 'm' }, |
557 | { "skip-login", no_argument, 0, 'n' }, | |
e85281a8 | 558 | { "nonewline", no_argument, 0, 'N' }, |
eb8e1f9f | 559 | { "login-options", required_argument, 0, 'o' }, |
3fc62fd3 | 560 | { "login-pause", no_argument, 0, 'p' }, |
e85281a8 DWF |
561 | { "nice", required_argument, 0, 'P' }, |
562 | { "chroot", required_argument, 0, 'r' }, | |
3aa6b68f | 563 | { "hangup", no_argument, 0, 'R' }, |
70bedfa1 KZ |
564 | { "keep-baud", no_argument, 0, 's' }, |
565 | { "timeout", required_argument, 0, 't' }, | |
566 | { "detect-case", no_argument, 0, 'U' }, | |
567 | { "wait-cr", no_argument, 0, 'w' }, | |
36601b23 | 568 | { "nohints", no_argument, 0, NOHINTS_OPTION }, |
3fc62fd3 | 569 | { "nohostname", no_argument, 0, NOHOSTNAME_OPTION }, |
e85281a8 | 570 | { "long-hostname", no_argument, 0, LONGHOSTNAME_OPTION }, |
70bedfa1 KZ |
571 | { "version", no_argument, 0, VERSION_OPTION }, |
572 | { "help", no_argument, 0, HELP_OPTION }, | |
cb872ac9 KZ |
573 | { "erase-chars", required_argument, 0, ERASE_CHARS_OPTION }, |
574 | { "kill-chars", required_argument, 0, KILL_CHARS_OPTION }, | |
70bedfa1 KZ |
575 | { NULL, 0, 0, 0 } |
576 | }; | |
577 | ||
763d7a87 | 578 | while ((c = getopt_long(argc, argv, |
01095ae3 | 579 | "8a:cC:d:Ef:hH:iI:Jl:LmnNo:pP:r:Rst:Uw", longopts, |
53d55042 | 580 | NULL)) != -1) { |
70bedfa1 KZ |
581 | switch (c) { |
582 | case '8': | |
bde20e1b | 583 | op->flags |= F_EIGHTBITS; |
70bedfa1 | 584 | break; |
eb8e1f9f WF |
585 | case 'a': |
586 | op->autolog = optarg; | |
587 | break; | |
70bedfa1 KZ |
588 | case 'c': |
589 | op->flags |= F_KEEPCFLAGS; | |
590 | break; | |
e85281a8 DWF |
591 | case 'C': |
592 | op->chdir = optarg; | |
593 | break; | |
594 | case 'd': | |
595 | op->delay = atoi(optarg); | |
596 | break; | |
01095ae3 KZ |
597 | case 'E': |
598 | op->flags |= F_REMOTE; | |
599 | break; | |
53d55042 | 600 | case 'f': |
70bedfa1 KZ |
601 | op->flags |= F_CUSTISSUE; |
602 | op->issue = optarg; | |
603 | break; | |
53d55042 | 604 | case 'h': |
70bedfa1 KZ |
605 | op->flags |= F_RTSCTS; |
606 | break; | |
53d55042 | 607 | case 'H': |
70bedfa1 KZ |
608 | fakehost = optarg; |
609 | break; | |
53d55042 | 610 | case 'i': |
70bedfa1 KZ |
611 | op->flags &= ~F_ISSUE; |
612 | break; | |
613 | case 'I': | |
729def03 WF |
614 | init_special_char(optarg, op); |
615 | op->flags |= F_INITSTRING; | |
616 | break; | |
e85281a8 DWF |
617 | case 'J': |
618 | op->flags |= F_NOCLEAR; | |
619 | break; | |
70bedfa1 | 620 | case 'l': |
53d55042 | 621 | op->login = optarg; |
70bedfa1 | 622 | break; |
53d55042 | 623 | case 'L': |
ef264c83 KZ |
624 | /* -L and -L=always have the same meaning */ |
625 | op->clocal = CLOCAL_MODE_ALWAYS; | |
626 | if (optarg) { | |
627 | if (strcmp(optarg, "=always") == 0) | |
628 | op->clocal = CLOCAL_MODE_ALWAYS; | |
629 | else if (strcmp(optarg, "=never") == 0) | |
630 | op->clocal = CLOCAL_MODE_NEVER; | |
631 | else if (strcmp(optarg, "=auto") == 0) | |
632 | op->clocal = CLOCAL_MODE_AUTO; | |
633 | else | |
634 | log_err(_("unssuported --local-line mode argument")); | |
635 | } | |
70bedfa1 | 636 | break; |
53d55042 | 637 | case 'm': |
70bedfa1 KZ |
638 | op->flags |= F_PARSE; |
639 | break; | |
640 | case 'n': | |
641 | op->flags |= F_NOPROMPT; | |
642 | break; | |
eb8e1f9f WF |
643 | case 'o': |
644 | op->logopt = optarg; | |
645 | break; | |
646 | case 'p': | |
647 | op->flags |= F_LOGINPAUSE; | |
648 | break; | |
e85281a8 DWF |
649 | case 'P': |
650 | op->nice = atoi(optarg); | |
651 | break; | |
652 | case 'r': | |
653 | op->chroot = optarg; | |
654 | break; | |
3aa6b68f WF |
655 | case 'R': |
656 | op->flags |= F_HANGUP; | |
657 | break; | |
70bedfa1 | 658 | case 's': |
53d55042 | 659 | op->flags |= F_KEEPSPEED; |
70bedfa1 | 660 | break; |
53d55042 | 661 | case 't': |
70bedfa1 | 662 | if ((op->timeout = atoi(optarg)) <= 0) |
bde20e1b | 663 | log_err(_("bad timeout value: %s"), optarg); |
70bedfa1 KZ |
664 | break; |
665 | case 'U': | |
666 | op->flags |= F_LCUC; | |
667 | break; | |
668 | case 'w': | |
669 | op->flags |= F_WAITCRLF; | |
670 | break; | |
36601b23 KZ |
671 | case NOHINTS_OPTION: |
672 | op->flags |= F_NOHINTS; | |
673 | break; | |
e85281a8 DWF |
674 | case NOHOSTNAME_OPTION: |
675 | op->flags |= F_NOHOSTNAME; | |
676 | break; | |
677 | case LONGHOSTNAME_OPTION: | |
678 | op->flags |= F_LONGHNAME; | |
679 | break; | |
cb872ac9 KZ |
680 | case ERASE_CHARS_OPTION: |
681 | op->erasechars = optarg; | |
682 | break; | |
683 | case KILL_CHARS_OPTION: | |
684 | op->killchars = optarg; | |
685 | break; | |
70bedfa1 KZ |
686 | case VERSION_OPTION: |
687 | printf(_("%s from %s\n"), program_invocation_short_name, | |
53d55042 | 688 | PACKAGE_STRING); |
70bedfa1 KZ |
689 | exit(EXIT_SUCCESS); |
690 | case HELP_OPTION: | |
691 | usage(stdout); | |
692 | default: | |
693 | usage(stderr); | |
726f69e2 | 694 | } |
6dbe3af9 | 695 | } |
70bedfa1 KZ |
696 | |
697 | debug("after getopt loop\n"); | |
698 | ||
729def03 | 699 | if (argc < optind + 1) { |
bde20e1b | 700 | log_warn(_("not enough arguments")); |
70bedfa1 KZ |
701 | usage(stderr); |
702 | } | |
703 | ||
729def03 | 704 | /* Accept "tty", "baudrate tty", and "tty baudrate". */ |
53d55042 SK |
705 | if ('0' <= argv[optind][0] && argv[optind][0] <= '9') { |
706 | /* Assume BSD style speed. */ | |
707 | parse_speeds(op, argv[optind++]); | |
729def03 WF |
708 | if (argc < optind + 1) { |
709 | warn(_("not enough arguments")); | |
710 | usage(stderr); | |
711 | } | |
712 | op->tty = argv[optind++]; | |
70bedfa1 | 713 | } else { |
53d55042 | 714 | op->tty = argv[optind++]; |
729def03 WF |
715 | if (argc > optind) { |
716 | char *v = argv[optind++]; | |
717 | if ('0' <= *v && *v <= '9') | |
718 | parse_speeds(op, v); | |
719 | else | |
720 | op->speeds[op->numspeed++] = bcode("9600"); | |
721 | } | |
70bedfa1 KZ |
722 | } |
723 | ||
729def03 WF |
724 | /* On virtual console remember the line which is used for */ |
725 | if (strncmp(op->tty, "tty", 3) == 0 && | |
726 | strspn(op->tty + 3, "0123456789") == strlen(op->tty+3)) | |
727 | op->vcline = op->tty+3; | |
728 | ||
70bedfa1 | 729 | if (argc > optind && argv[optind]) |
729def03 | 730 | op->term = argv[optind]; |
6dbe3af9 | 731 | |
66ee8158 | 732 | #ifdef DO_DEVFS_FIDDLING |
70bedfa1 | 733 | /* |
53d55042 | 734 | * Some devfs junk, following Goswin Brederlow: |
70bedfa1 KZ |
735 | * turn ttyS<n> into tts/<n> |
736 | * turn tty<n> into vc/<n> | |
53d55042 | 737 | * http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=72241 |
70bedfa1 KZ |
738 | */ |
739 | if (op->tty && strlen(op->tty) < 90) { | |
740 | char dev_name[100]; | |
741 | struct stat st; | |
742 | ||
743 | if (strncmp(op->tty, "ttyS", 4) == 0) { | |
744 | strcpy(dev_name, "/dev/"); | |
745 | strcat(dev_name, op->tty); | |
746 | if (stat(dev_name, &st) < 0) { | |
747 | strcpy(dev_name, "/dev/tts/"); | |
748 | strcat(dev_name, op->tty + 4); | |
ca8e91a4 KZ |
749 | if (stat(dev_name, &st) == 0) { |
750 | op->tty = strdup(dev_name + 5); | |
751 | if (!op->tty) | |
752 | log_err(_("failed to allocate memory: %m")); | |
753 | } | |
70bedfa1 KZ |
754 | } |
755 | } else if (strncmp(op->tty, "tty", 3) == 0) { | |
756 | strcpy(dev_name, "/dev/"); | |
757 | strncat(dev_name, op->tty, 90); | |
758 | if (stat(dev_name, &st) < 0) { | |
759 | strcpy(dev_name, "/dev/vc/"); | |
760 | strcat(dev_name, op->tty + 3); | |
ca8e91a4 KZ |
761 | if (stat(dev_name, &st) == 0) { |
762 | op->tty = strdup(dev_name + 5); | |
763 | if (!op->tty) | |
764 | log_err(_("failed to allocate memory: %m")); | |
765 | } | |
70bedfa1 KZ |
766 | } |
767 | } | |
768 | } | |
53d55042 | 769 | #endif /* DO_DEVFS_FIDDLING */ |
66ee8158 | 770 | |
70bedfa1 | 771 | debug("exiting parseargs\n"); |
6dbe3af9 KZ |
772 | } |
773 | ||
53d55042 | 774 | /* Parse alternate baud rates. */ |
bde20e1b | 775 | static void parse_speeds(struct options *op, char *arg) |
6dbe3af9 | 776 | { |
53d55042 | 777 | char *cp; |
6dbe3af9 | 778 | |
f021834e | 779 | debug("entered parse_speeds\n"); |
f8bd089b | 780 | for (cp = strtok(arg, ","); cp != NULL; cp = strtok((char *)0, ",")) { |
70bedfa1 | 781 | if ((op->speeds[op->numspeed++] = bcode(cp)) <= 0) |
bde20e1b | 782 | log_err(_("bad speed: %s"), cp); |
70bedfa1 | 783 | if (op->numspeed >= MAX_SPEED) |
bde20e1b | 784 | log_err(_("too many alternate speeds")); |
70bedfa1 KZ |
785 | } |
786 | debug("exiting parsespeeds\n"); | |
6dbe3af9 KZ |
787 | } |
788 | ||
789 | #ifdef SYSV_STYLE | |
790 | ||
53d55042 | 791 | /* Update our utmp entry. */ |
729def03 | 792 | static void update_utmp(struct options *op) |
6dbe3af9 | 793 | { |
53d55042 SK |
794 | struct utmp ut; |
795 | time_t t; | |
729def03 WF |
796 | pid_t pid = getpid(); |
797 | pid_t sid = getsid(0); | |
798 | char *vcline = op->vcline; | |
799 | char *line = op->tty; | |
53d55042 | 800 | struct utmp *utp; |
70bedfa1 KZ |
801 | |
802 | /* | |
803 | * The utmp file holds miscellaneous information about things started by | |
804 | * /sbin/init and other system-related events. Our purpose is to update | |
805 | * the utmp entry for the current process, in particular the process type | |
806 | * and the tty line we are listening to. Return successfully only if the | |
807 | * utmp file can be opened for update, and if we are able to find our | |
808 | * entry in the utmp file. | |
809 | */ | |
70bedfa1 KZ |
810 | utmpname(_PATH_UTMP); |
811 | setutent(); | |
812 | ||
53d55042 | 813 | /* |
729def03 | 814 | * Find my pid in utmp. |
53d55042 SK |
815 | * |
816 | * FIXME: Earlier (when was that?) code here tested only utp->ut_type != | |
817 | * INIT_PROCESS, so maybe the >= here should be >. | |
818 | * | |
819 | * FIXME: The present code is taken from login.c, so if this is changed, | |
820 | * maybe login has to be changed as well (is this true?). | |
821 | */ | |
70bedfa1 | 822 | while ((utp = getutent())) |
729def03 | 823 | if (utp->ut_pid == pid |
70bedfa1 KZ |
824 | && utp->ut_type >= INIT_PROCESS |
825 | && utp->ut_type <= DEAD_PROCESS) | |
826 | break; | |
827 | ||
828 | if (utp) { | |
829 | memcpy(&ut, utp, sizeof(ut)); | |
830 | } else { | |
53d55042 | 831 | /* Some inits do not initialize utmp. */ |
70bedfa1 | 832 | memset(&ut, 0, sizeof(ut)); |
729def03 WF |
833 | if (vcline && *vcline) |
834 | /* Standard virtual console devices */ | |
763d7a87 | 835 | strncpy(ut.ut_id, vcline, sizeof(ut.ut_id)); |
729def03 WF |
836 | else { |
837 | size_t len = strlen(line); | |
838 | char * ptr; | |
763d7a87 KZ |
839 | if (len >= sizeof(ut.ut_id)) |
840 | ptr = line + len - sizeof(ut.ut_id); | |
729def03 WF |
841 | else |
842 | ptr = line; | |
763d7a87 | 843 | strncpy(ut.ut_id, ptr, sizeof(ut.ut_id)); |
729def03 | 844 | } |
70bedfa1 KZ |
845 | } |
846 | ||
847 | strncpy(ut.ut_user, "LOGIN", sizeof(ut.ut_user)); | |
848 | strncpy(ut.ut_line, line, sizeof(ut.ut_line)); | |
849 | if (fakehost) | |
850 | strncpy(ut.ut_host, fakehost, sizeof(ut.ut_host)); | |
851 | time(&t); | |
852 | ut.ut_time = t; | |
853 | ut.ut_type = LOGIN_PROCESS; | |
729def03 WF |
854 | ut.ut_pid = pid; |
855 | ut.ut_session = sid; | |
70bedfa1 KZ |
856 | |
857 | pututline(&ut); | |
858 | endutent(); | |
859 | ||
860 | { | |
48d7b13a | 861 | #ifdef HAVE_UPDWTMP |
70bedfa1 | 862 | updwtmp(_PATH_WTMP, &ut); |
5c36a0eb | 863 | #else |
70bedfa1 KZ |
864 | int ut_fd; |
865 | int lf; | |
866 | ||
53d55042 | 867 | if ((lf = open(_PATH_WTMPLOCK, O_CREAT | O_WRONLY, 0660)) >= 0) { |
70bedfa1 | 868 | flock(lf, LOCK_EX); |
53d55042 SK |
869 | if ((ut_fd = |
870 | open(_PATH_WTMP, O_APPEND | O_WRONLY)) >= 0) { | |
729def03 | 871 | write_all(ut_fd, &ut, sizeof(ut)); |
70bedfa1 KZ |
872 | close(ut_fd); |
873 | } | |
874 | flock(lf, LOCK_UN); | |
875 | close(lf); | |
876 | } | |
53d55042 | 877 | #endif /* HAVE_UPDWTMP */ |
70bedfa1 | 878 | } |
6dbe3af9 KZ |
879 | } |
880 | ||
53d55042 | 881 | #endif /* SYSV_STYLE */ |
6dbe3af9 | 882 | |
53d55042 | 883 | /* Set up tty as stdin, stdout & stderr. */ |
729def03 | 884 | static void open_tty(char *tty, struct termios *tp, struct options *op) |
6dbe3af9 | 885 | { |
3aa6b68f | 886 | const pid_t pid = getpid(); |
783b08fc | 887 | int serial, closed = 0; |
6dbe3af9 | 888 | |
3aa6b68f WF |
889 | /* Set up new standard input, unless we are given an already opened port. */ |
890 | ||
891 | if (strcmp(tty, "-") != 0) { | |
892 | char buf[PATH_MAX+1]; | |
893 | struct group *gr = NULL; | |
70bedfa1 | 894 | struct stat st; |
3aa6b68f WF |
895 | int fd, len; |
896 | pid_t tid; | |
897 | gid_t gid = 0; | |
898 | ||
899 | /* Use tty group if available */ | |
900 | if ((gr = getgrnam("tty"))) | |
901 | gid = gr->gr_gid; | |
902 | ||
763d7a87 KZ |
903 | if (((len = snprintf(buf, sizeof(buf), "/dev/%s", tty)) >= |
904 | (int)sizeof(buf)) || (len < 0)) | |
3aa6b68f WF |
905 | log_err(_("/dev/%s: cannot open as standard input: %m"), tty); |
906 | ||
907 | /* | |
908 | * There is always a race between this reset and the call to | |
909 | * vhangup() that s.o. can use to get access to your tty. | |
910 | * Linux login(1) will change tty permissions. Use root owner and group | |
911 | * with permission -rw------- for the period between getty and login. | |
912 | */ | |
91984e93 | 913 | if (chown(buf, 0, gid) || chmod(buf, (gid ? 0620 : 0600))) { |
3aa6b68f WF |
914 | if (errno == EROFS) |
915 | log_warn("%s: %m", buf); | |
916 | else | |
917 | log_err("%s: %m", buf); | |
918 | } | |
6dbe3af9 | 919 | |
3aa6b68f WF |
920 | /* Open the tty as standard input. */ |
921 | if ((fd = open(buf, O_RDWR|O_NOCTTY|O_NONBLOCK, 0)) < 0) | |
922 | log_err(_("/dev/%s: cannot open as standard input: %m"), tty); | |
923 | ||
924 | /* Sanity checks... */ | |
763d7a87 | 925 | if (!isatty(fd)) |
3aa6b68f WF |
926 | log_err(_("/dev/%s: not a character device"), tty); |
927 | if (fstat(fd, &st) < 0) | |
763d7a87 | 928 | log_err("%s: %m", buf); |
70bedfa1 | 929 | if ((st.st_mode & S_IFMT) != S_IFCHR) |
bde20e1b | 930 | log_err(_("/dev/%s: not a character device"), tty); |
6dbe3af9 | 931 | |
3aa6b68f | 932 | if (((tid = tcgetsid(fd)) < 0) || (pid != tid)) { |
763d7a87 | 933 | if (ioctl(fd, TIOCSCTTY, 1) == -1) |
8c219bf4 | 934 | log_warn(_("/dev/%s: cannot get controlling tty: %m"), tty); |
3aa6b68f WF |
935 | } |
936 | ||
783b08fc KZ |
937 | close(STDIN_FILENO); |
938 | errno = 0; | |
939 | ||
3aa6b68f | 940 | if (op->flags & F_HANGUP) { |
783b08fc KZ |
941 | |
942 | if (ioctl(fd, TIOCNOTTY)) | |
943 | debug("TIOCNOTTY ioctl failed\n"); | |
944 | ||
3aa6b68f | 945 | /* |
783b08fc KZ |
946 | * Let's close all file decriptors before vhangup |
947 | * https://lkml.org/lkml/2012/6/5/145 | |
3aa6b68f | 948 | */ |
783b08fc KZ |
949 | close(fd); |
950 | close(STDOUT_FILENO); | |
951 | close(STDERR_FILENO); | |
952 | errno = 0; | |
953 | closed = 1; | |
954 | ||
3aa6b68f | 955 | if (vhangup()) |
8c219bf4 | 956 | log_err(_("/dev/%s: vhangup() failed: %m"), tty); |
783b08fc KZ |
957 | } else |
958 | close(fd); | |
6dbe3af9 | 959 | |
70bedfa1 | 960 | debug("open(2)\n"); |
3aa6b68f WF |
961 | if (open(buf, O_RDWR|O_NOCTTY|O_NONBLOCK, 0) != 0) |
962 | log_err(_("/dev/%s: cannot open as standard input: %m"), tty); | |
783b08fc | 963 | |
3aa6b68f | 964 | if (((tid = tcgetsid(STDIN_FILENO)) < 0) || (pid != tid)) { |
763d7a87 | 965 | if (ioctl(STDIN_FILENO, TIOCSCTTY, 1) == -1) |
8c219bf4 | 966 | log_warn(_("/dev/%s: cannot get controlling tty: %m"), tty); |
3aa6b68f WF |
967 | } |
968 | ||
70bedfa1 | 969 | } else { |
3aa6b68f | 970 | |
70bedfa1 KZ |
971 | /* |
972 | * Standard input should already be connected to an open port. Make | |
973 | * sure it is open for read/write. | |
974 | */ | |
3aa6b68f | 975 | |
70bedfa1 | 976 | if ((fcntl(STDIN_FILENO, F_GETFL, 0) & O_RDWR) != O_RDWR) |
bde20e1b | 977 | log_err(_("%s: not open for read/write"), tty); |
3aa6b68f | 978 | |
70bedfa1 KZ |
979 | } |
980 | ||
3aa6b68f | 981 | if (tcsetpgrp(STDIN_FILENO, pid)) |
8c219bf4 | 982 | log_warn(_("/dev/%s: cannot set process group: %m"), tty); |
3aa6b68f WF |
983 | |
984 | /* Get rid of the present outputs. */ | |
783b08fc KZ |
985 | if (!closed) { |
986 | close(STDOUT_FILENO); | |
987 | close(STDERR_FILENO); | |
988 | errno = 0; | |
989 | } | |
3aa6b68f | 990 | |
70bedfa1 KZ |
991 | /* Set up standard output and standard error file descriptors. */ |
992 | debug("duping\n"); | |
53d55042 | 993 | |
70bedfa1 KZ |
994 | /* set up stdout and stderr */ |
995 | if (dup(STDIN_FILENO) != 1 || dup(STDIN_FILENO) != 2) | |
bde20e1b | 996 | log_err(_("%s: dup problem: %m"), tty); |
6dbe3af9 | 997 | |
3aa6b68f WF |
998 | /* make stdio unbuffered for slow modem lines */ |
999 | setvbuf(stdout, NULL, _IONBF, 0); | |
1000 | ||
6dbe3af9 | 1001 | /* |
70bedfa1 KZ |
1002 | * The following ioctl will fail if stdin is not a tty, but also when |
1003 | * there is noise on the modem control lines. In the latter case, the | |
53d55042 SK |
1004 | * common course of action is (1) fix your cables (2) give the modem |
1005 | * more time to properly reset after hanging up. | |
1006 | * | |
1007 | * SunOS users can achieve (2) by patching the SunOS kernel variable | |
1008 | * "zsadtrlow" to a larger value; 5 seconds seems to be a good value. | |
1009 | * http://www.sunmanagers.org/archives/1993/0574.html | |
6dbe3af9 | 1010 | */ |
bde20e1b | 1011 | memset(tp, 0, sizeof(struct termios)); |
70bedfa1 | 1012 | if (tcgetattr(STDIN_FILENO, tp) < 0) |
8c219bf4 | 1013 | log_err(_("%s: failed to get terminal attributes: %m"), tty); |
70bedfa1 KZ |
1014 | |
1015 | /* | |
3aa6b68f WF |
1016 | * Detect if this is a virtual console or serial/modem line. |
1017 | * In case of a virtual console the ioctl TIOCMGET fails and | |
1018 | * the error number will be set to EINVAL. | |
70bedfa1 | 1019 | */ |
89aed1c9 | 1020 | if (ioctl(STDIN_FILENO, TIOCMGET, &serial) < 0 && (errno == EINVAL)) { |
3aa6b68f WF |
1021 | op->flags |= F_VCONSOLE; |
1022 | if (!op->term) | |
1023 | op->term = DEFAULT_VCTERM; | |
1024 | } else if (!op->term) | |
1025 | op->term = DEFAULT_STERM; | |
729def03 WF |
1026 | |
1027 | setenv("TERM", op->term, 1); | |
6dbe3af9 KZ |
1028 | } |
1029 | ||
53d55042 | 1030 | /* Initialize termios settings. */ |
bde20e1b | 1031 | static void termio_init(struct options *op, struct termios *tp) |
6dbe3af9 | 1032 | { |
70bedfa1 | 1033 | speed_t ispeed, ospeed; |
1683f6bf | 1034 | struct winsize ws; |
70bedfa1 | 1035 | |
0da025da WF |
1036 | if (op->flags & F_VCONSOLE) { |
1037 | #if defined(IUTF8) && defined(KDGKBMODE) | |
1038 | int mode; | |
1039 | ||
1040 | /* Detect mode of current keyboard setup, e.g. for UTF-8 */ | |
1041 | if (ioctl(STDIN_FILENO, KDGKBMODE, &mode) < 0) | |
1042 | mode = K_RAW; | |
1043 | switch(mode) { | |
1044 | case K_UNICODE: | |
b0198a11 | 1045 | setlocale(LC_CTYPE, "C.UTF-8"); |
0da025da WF |
1046 | op->flags |= F_UTF8; |
1047 | break; | |
1048 | case K_RAW: | |
1049 | case K_MEDIUMRAW: | |
1050 | case K_XLATE: | |
1051 | default: | |
1052 | setlocale(LC_CTYPE, "POSIX"); | |
1053 | op->flags &= ~F_UTF8; | |
1054 | break; | |
1055 | } | |
1056 | #else | |
1057 | setlocale(LC_CTYPE, "POSIX"); | |
1058 | op->flags &= ~F_UTF8; | |
1059 | #endif | |
1060 | reset_vc(op, tp); | |
1061 | ||
1062 | if ((tp->c_cflag & (CS8|PARODD|PARENB)) == CS8) | |
1063 | op->flags |= F_EIGHTBITS; | |
1064 | ||
e85281a8 DWF |
1065 | if ((op->flags & F_NOCLEAR) == 0) { |
1066 | /* | |
1067 | * Do not write a full reset (ESC c) because this destroys | |
1068 | * the unicode mode again if the terminal was in unicode | |
1069 | * mode. Also it clears the CONSOLE_MAGIC features which | |
1070 | * are required for some languages/console-fonts. | |
1071 | * Just put the cursor to the home position (ESC [ H), | |
1072 | * erase everything below the cursor (ESC [ J), and set the | |
1073 | * scrolling region to the full window (ESC [ r) | |
1074 | */ | |
1075 | write_all(STDOUT_FILENO, "\033[r\033[H\033[J", 9); | |
1076 | } | |
0da025da WF |
1077 | return; |
1078 | } | |
1079 | ||
70bedfa1 | 1080 | if (op->flags & F_KEEPSPEED) { |
53d55042 SK |
1081 | /* Save the original setting. */ |
1082 | ispeed = cfgetispeed(tp); | |
70bedfa1 | 1083 | ospeed = cfgetospeed(tp); |
1683f6bf DWF |
1084 | |
1085 | if (!ispeed) ispeed = TTYDEF_SPEED; | |
1086 | if (!ospeed) ospeed = TTYDEF_SPEED; | |
1087 | ||
53d55042 | 1088 | } else { |
70bedfa1 | 1089 | ospeed = ispeed = op->speeds[FIRST_SPEED]; |
53d55042 | 1090 | } |
70bedfa1 KZ |
1091 | |
1092 | /* | |
1093 | * Initial termios settings: 8-bit characters, raw-mode, blocking i/o. | |
1094 | * Special characters are set after we have read the login name; all | |
1095 | * reads will be done in raw mode anyway. Errors will be dealt with | |
53d55042 | 1096 | * later on. |
70bedfa1 | 1097 | */ |
53d55042 SK |
1098 | |
1099 | /* Flush input and output queues, important for modems! */ | |
1100 | tcflush(STDIN_FILENO, TCIOFLUSH); | |
70bedfa1 | 1101 | |
8408647d WF |
1102 | #ifdef IUTF8 |
1103 | tp->c_iflag = tp->c_iflag & IUTF8; | |
7478fce0 ST |
1104 | if (tp->c_iflag & IUTF8) |
1105 | op->flags |= F_UTF8; | |
8408647d WF |
1106 | #else |
1107 | tp->c_iflag = 0; | |
1108 | #endif | |
9c62a232 DJ |
1109 | tp->c_lflag = 0; |
1110 | tp->c_oflag &= OPOST | ONLCR; | |
70bedfa1 | 1111 | |
1683f6bf | 1112 | if ((op->flags & F_KEEPCFLAGS) == 0) |
70bedfa1 KZ |
1113 | tp->c_cflag = CS8 | HUPCL | CREAD | (tp->c_cflag & CLOCAL); |
1114 | ||
53d55042 SK |
1115 | /* |
1116 | * Note that the speed is stored in the c_cflag termios field, so we have | |
70bedfa1 KZ |
1117 | * set the speed always when the cflag se reseted. |
1118 | */ | |
1119 | cfsetispeed(tp, ispeed); | |
1120 | cfsetospeed(tp, ospeed); | |
1121 | ||
ef264c83 KZ |
1122 | /* The default is to follow setting from kernel, but it's possible |
1123 | * to explicitly remove/add CLOCAL flag by -L[=<mode>]*/ | |
1124 | switch (op->clocal) { | |
1125 | case CLOCAL_MODE_ALWAYS: | |
1126 | tp->c_cflag |= CLOCAL; /* -L or -L=always */ | |
1127 | break; | |
1128 | case CLOCAL_MODE_NEVER: | |
1129 | tp->c_cflag &= ~CLOCAL; /* -L=never */ | |
1130 | break; | |
1131 | case CLOCAL_MODE_AUTO: /* -L=auto */ | |
1132 | break; | |
1133 | } | |
1134 | ||
30e8b186 | 1135 | #ifdef HAVE_STRUCT_TERMIOS_C_LINE |
70bedfa1 | 1136 | tp->c_line = 0; |
1961482a | 1137 | #endif |
70bedfa1 KZ |
1138 | tp->c_cc[VMIN] = 1; |
1139 | tp->c_cc[VTIME] = 0; | |
7eda085c | 1140 | |
1683f6bf DWF |
1141 | /* Check for terminal size and if not found set default */ |
1142 | if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == 0) { | |
1143 | int set = 0; | |
1144 | if (ws.ws_row == 0) { | |
1145 | ws.ws_row = 24; | |
1146 | set++; | |
1147 | } | |
1148 | if (ws.ws_col == 0) { | |
1149 | ws.ws_col = 80; | |
1150 | set++; | |
1151 | } | |
efcf26f4 KZ |
1152 | if (ioctl(STDIN_FILENO, TIOCSWINSZ, &ws)) |
1153 | debug("TIOCSWINSZ ioctl failed\n"); | |
1683f6bf DWF |
1154 | } |
1155 | ||
53d55042 | 1156 | /* Optionally enable hardware flow control. */ |
7eda085c | 1157 | #ifdef CRTSCTS |
70bedfa1 KZ |
1158 | if (op->flags & F_RTSCTS) |
1159 | tp->c_cflag |= CRTSCTS; | |
7eda085c KZ |
1160 | #endif |
1161 | ||
53d55042 | 1162 | tcsetattr(STDIN_FILENO, TCSANOW, tp); |
fd6b7a7f | 1163 | |
53d55042 SK |
1164 | /* Go to blocking input even in local mode. */ |
1165 | fcntl(STDIN_FILENO, F_SETFL, | |
1166 | fcntl(STDIN_FILENO, F_GETFL, 0) & ~O_NONBLOCK); | |
fd6b7a7f | 1167 | |
70bedfa1 | 1168 | debug("term_io 2\n"); |
6dbe3af9 KZ |
1169 | } |
1170 | ||
0da025da WF |
1171 | /* Reset virtual console on stdin to its defaults */ |
1172 | static void reset_vc(const struct options *op, struct termios *tp) | |
1173 | { | |
879a7ab4 KZ |
1174 | int fl = 0; |
1175 | ||
1176 | fl |= (op->flags & F_KEEPCFLAGS) == 0 ? 0 : UL_TTY_KEEPCFLAGS; | |
1177 | fl |= (op->flags & F_UTF8) == 0 ? 0 : UL_TTY_UTF8; | |
1178 | ||
1179 | reset_virtual_console(tp, fl); | |
0da025da | 1180 | |
0da025da | 1181 | if (tcsetattr(STDIN_FILENO, TCSADRAIN, tp)) |
8c219bf4 | 1182 | log_warn(_("setting terminal attributes failed: %m")); |
0da025da WF |
1183 | } |
1184 | ||
53d55042 | 1185 | /* Extract baud rate from modem status message. */ |
bde20e1b | 1186 | static void auto_baud(struct termios *tp) |
6dbe3af9 | 1187 | { |
bde20e1b | 1188 | speed_t speed; |
53d55042 | 1189 | int vmin; |
70bedfa1 | 1190 | unsigned iflag; |
53d55042 SK |
1191 | char buf[BUFSIZ]; |
1192 | char *bp; | |
1193 | int nread; | |
70bedfa1 KZ |
1194 | |
1195 | /* | |
1196 | * This works only if the modem produces its status code AFTER raising | |
1197 | * the DCD line, and if the computer is fast enough to set the proper | |
1198 | * baud rate before the message has gone by. We expect a message of the | |
1199 | * following format: | |
1200 | * | |
1201 | * <junk><number><junk> | |
1202 | * | |
1203 | * The number is interpreted as the baud rate of the incoming call. If the | |
1204 | * modem does not tell us the baud rate within one second, we will keep | |
1205 | * using the current baud rate. It is advisable to enable BREAK | |
1206 | * processing (comma-separated list of baud rates) if the processing of | |
1207 | * modem status messages is enabled. | |
1208 | */ | |
1209 | ||
1210 | /* | |
1211 | * Use 7-bit characters, don't block if input queue is empty. Errors will | |
53d55042 | 1212 | * be dealt with later on. |
70bedfa1 | 1213 | */ |
70bedfa1 | 1214 | iflag = tp->c_iflag; |
53d55042 SK |
1215 | /* Enable 8th-bit stripping. */ |
1216 | tp->c_iflag |= ISTRIP; | |
70bedfa1 | 1217 | vmin = tp->c_cc[VMIN]; |
53d55042 SK |
1218 | /* Do not block when queue is empty. */ |
1219 | tp->c_cc[VMIN] = 0; | |
70bedfa1 KZ |
1220 | tcsetattr(STDIN_FILENO, TCSANOW, tp); |
1221 | ||
1222 | /* | |
1223 | * Wait for a while, then read everything the modem has said so far and | |
1224 | * try to extract the speed of the dial-in call. | |
1225 | */ | |
53d55042 | 1226 | sleep(1); |
70bedfa1 KZ |
1227 | if ((nread = read(STDIN_FILENO, buf, sizeof(buf) - 1)) > 0) { |
1228 | buf[nread] = '\0'; | |
53d55042 | 1229 | for (bp = buf; bp < buf + nread; bp++) |
70bedfa1 KZ |
1230 | if (isascii(*bp) && isdigit(*bp)) { |
1231 | if ((speed = bcode(bp))) { | |
1232 | cfsetispeed(tp, speed); | |
1233 | cfsetospeed(tp, speed); | |
1234 | } | |
1235 | break; | |
1236 | } | |
6dbe3af9 | 1237 | } |
6dbe3af9 | 1238 | |
53d55042 | 1239 | /* Restore terminal settings. Errors will be dealt with later on. */ |
70bedfa1 KZ |
1240 | tp->c_iflag = iflag; |
1241 | tp->c_cc[VMIN] = vmin; | |
53d55042 | 1242 | tcsetattr(STDIN_FILENO, TCSANOW, tp); |
6dbe3af9 KZ |
1243 | } |
1244 | ||
2448f336 KZ |
1245 | static char *xgethostname(void) |
1246 | { | |
1247 | char *name; | |
1248 | size_t sz = get_hostname_max() + 1; | |
1249 | ||
1250 | name = malloc(sizeof(char) * sz); | |
1251 | if (!name) | |
1252 | log_err(_("failed to allocate memory: %m")); | |
1253 | ||
8362545b KZ |
1254 | if (gethostname(name, sz) != 0) { |
1255 | free(name); | |
2448f336 | 1256 | return NULL; |
8362545b | 1257 | } |
2448f336 KZ |
1258 | name[sz - 1] = '\0'; |
1259 | return name; | |
1260 | } | |
1261 | ||
1262 | static char *xgetdomainname(void) | |
1263 | { | |
1264 | #ifdef HAVE_GETDOMAINNAME | |
1265 | char *name; | |
1266 | size_t sz = get_hostname_max() + 1; | |
1267 | ||
1268 | name = malloc(sizeof(char) * sz); | |
1269 | if (!name) | |
1270 | log_err(_("failed to allocate memory: %m")); | |
1271 | ||
8362545b KZ |
1272 | if (getdomainname(name, sz) != 0) { |
1273 | free(name); | |
2448f336 | 1274 | return NULL; |
8362545b | 1275 | } |
2448f336 KZ |
1276 | name[sz - 1] = '\0'; |
1277 | return name; | |
1278 | #endif | |
1279 | return NULL; | |
1280 | } | |
1281 | ||
53d55042 | 1282 | /* Show login prompt, optionally preceded by /etc/issue contents. */ |
bde20e1b | 1283 | static void do_prompt(struct options *op, struct termios *tp) |
6dbe3af9 KZ |
1284 | { |
1285 | #ifdef ISSUE | |
53d55042 | 1286 | FILE *fd; |
53d55042 | 1287 | #endif /* ISSUE */ |
6dbe3af9 | 1288 | |
e85281a8 DWF |
1289 | if ((op->flags & F_NONL) == 0) { |
1290 | /* Issue not in use, start with a new line. */ | |
1291 | write_all(STDOUT_FILENO, "\r\n", 2); | |
1292 | } | |
3aa6b68f | 1293 | |
53d55042 | 1294 | #ifdef ISSUE |
70bedfa1 | 1295 | if ((op->flags & F_ISSUE) && (fd = fopen(op->issue, "r"))) { |
1683f6bf | 1296 | int c, oflag = tp->c_oflag; /* Save current setting. */ |
3aa6b68f | 1297 | |
1683f6bf DWF |
1298 | if ((op->flags & F_VCONSOLE) == 0) { |
1299 | /* Map new line in output to carriage return & new line. */ | |
1300 | tp->c_oflag |= (ONLCR | OPOST); | |
1301 | tcsetattr(STDIN_FILENO, TCSADRAIN, tp); | |
1302 | } | |
70bedfa1 KZ |
1303 | |
1304 | while ((c = getc(fd)) != EOF) { | |
729def03 | 1305 | if (c == '\\') |
2b945eda | 1306 | output_special_char(getc(fd), op, tp, fd); |
729def03 | 1307 | else |
763d7a87 | 1308 | putchar(c); |
70bedfa1 KZ |
1309 | } |
1310 | fflush(stdout); | |
6dbe3af9 | 1311 | |
1683f6bf DWF |
1312 | if ((op->flags & F_VCONSOLE) == 0) { |
1313 | /* Restore settings. */ | |
1314 | tp->c_oflag = oflag; | |
1315 | /* Wait till output is gone. */ | |
1316 | tcsetattr(STDIN_FILENO, TCSADRAIN, tp); | |
1317 | } | |
53d55042 | 1318 | fclose(fd); |
6dbe3af9 | 1319 | } |
eb8e1f9f WF |
1320 | #endif /* ISSUE */ |
1321 | if (op->flags & F_LOGINPAUSE) { | |
8c219bf4 | 1322 | puts(_("[press ENTER to login]")); |
eb8e1f9f WF |
1323 | getc(stdin); |
1324 | } | |
1325 | #ifdef KDGKBLED | |
36601b23 KZ |
1326 | if (!(op->flags & F_NOHINTS) && !op->autolog && |
1327 | (op->flags & F_VCONSOLE)) { | |
a694957a KZ |
1328 | int kb = 0; |
1329 | ||
eb8e1f9f | 1330 | if (ioctl(STDIN_FILENO, KDGKBLED, &kb) == 0) { |
a694957a KZ |
1331 | char hint[256] = { '\0' }; |
1332 | int nl = 0; | |
a694957a | 1333 | |
01c5b787 | 1334 | if (access(_PATH_NUMLOCK_ON, F_OK) == 0) |
a694957a KZ |
1335 | nl = 1; |
1336 | ||
1337 | if (nl && (kb & 0x02) == 0) | |
1338 | append(hint, sizeof(hint), NULL, _("Num Lock off")); | |
1339 | ||
1340 | else if (nl == 0 && (kb & 2) && (kb & 0x20) == 0) | |
1341 | append(hint, sizeof(hint), NULL, _("Num Lock on")); | |
1342 | ||
1343 | if ((kb & 0x04) && (kb & 0x40) == 0) | |
1344 | append(hint, sizeof(hint), ", ", _("Caps Lock on")); | |
1345 | ||
1346 | if ((kb & 0x01) && (kb & 0x10) == 0) | |
1347 | append(hint, sizeof(hint), ", ", _("Scroll Lock on")); | |
1348 | ||
1349 | if (*hint) | |
1350 | printf(_("Hint: %s\n\n"), hint); | |
eb8e1f9f WF |
1351 | } |
1352 | } | |
1353 | #endif /* KDGKBLED */ | |
e85281a8 | 1354 | if ((op->flags & F_NOHOSTNAME) == 0) { |
2448f336 KZ |
1355 | char *hn = xgethostname(); |
1356 | ||
1357 | if (hn) { | |
e85281a8 | 1358 | char *dot = strchr(hn, '.'); |
74b3df85 SK |
1359 | char *cn = hn; |
1360 | struct addrinfo *res = NULL; | |
e85281a8 | 1361 | |
e85281a8 DWF |
1362 | if ((op->flags & F_LONGHNAME) == 0) { |
1363 | if (dot) | |
1364 | *dot = '\0'; | |
74b3df85 SK |
1365 | |
1366 | } else if (dot == NULL) { | |
1367 | struct addrinfo hints; | |
1368 | ||
1369 | memset(&hints, 0, sizeof(hints)); | |
1370 | hints.ai_flags = AI_CANONNAME; | |
1371 | ||
1372 | if (!getaddrinfo(hn, NULL, &hints, &res) | |
1373 | && res && res->ai_canonname) | |
1374 | cn = res->ai_canonname; | |
1375 | } | |
1376 | ||
1377 | write_all(STDOUT_FILENO, cn, strlen(cn)); | |
e85281a8 | 1378 | write_all(STDOUT_FILENO, " ", 1); |
74b3df85 SK |
1379 | |
1380 | if (res) | |
1381 | freeaddrinfo(res); | |
2448f336 | 1382 | free(hn); |
e85281a8 | 1383 | } |
70bedfa1 | 1384 | } |
933956cb | 1385 | if (!op->autolog) { |
eb8e1f9f WF |
1386 | /* Always show login prompt. */ |
1387 | write_all(STDOUT_FILENO, LOGIN, sizeof(LOGIN) - 1); | |
1388 | } | |
6dbe3af9 KZ |
1389 | } |
1390 | ||
53d55042 | 1391 | /* Select next baud rate. */ |
bde20e1b | 1392 | static void next_speed(struct options *op, struct termios *tp) |
6dbe3af9 | 1393 | { |
70bedfa1 KZ |
1394 | static int baud_index = -1; |
1395 | ||
1396 | if (baud_index == -1) | |
1397 | /* | |
53d55042 | 1398 | * If the F_KEEPSPEED flags is set then the FIRST_SPEED is not |
70bedfa1 KZ |
1399 | * tested yet (see termio_init()). |
1400 | */ | |
53d55042 SK |
1401 | baud_index = |
1402 | (op->flags & F_KEEPSPEED) ? FIRST_SPEED : 1 % op->numspeed; | |
70bedfa1 KZ |
1403 | else |
1404 | baud_index = (baud_index + 1) % op->numspeed; | |
1405 | ||
1406 | cfsetispeed(tp, op->speeds[baud_index]); | |
1407 | cfsetospeed(tp, op->speeds[baud_index]); | |
53d55042 | 1408 | tcsetattr(STDIN_FILENO, TCSANOW, tp); |
6dbe3af9 KZ |
1409 | } |
1410 | ||
53d55042 | 1411 | /* Get user name, establish parity, speed, erase, kill & eol. */ |
bde20e1b | 1412 | static char *get_logname(struct options *op, struct termios *tp, struct chardata *cp) |
6dbe3af9 | 1413 | { |
70bedfa1 | 1414 | static char logname[BUFSIZ]; |
53d55042 SK |
1415 | char *bp; |
1416 | char c; /* input character, full eight bits */ | |
1417 | char ascval; /* low 7 bits of input character */ | |
1683f6bf | 1418 | int eightbit; |
53d55042 SK |
1419 | static char *erase[] = { /* backspace-space-backspace */ |
1420 | "\010\040\010", /* space parity */ | |
1421 | "\010\040\010", /* odd parity */ | |
1422 | "\210\240\210", /* even parity */ | |
1423 | "\210\240\210", /* no parity */ | |
70bedfa1 KZ |
1424 | }; |
1425 | ||
1426 | /* Initialize kill, erase, parity etc. (also after switching speeds). */ | |
f5664477 | 1427 | INIT_CHARDATA(cp); |
70bedfa1 | 1428 | |
53d55042 SK |
1429 | /* |
1430 | * Flush pending input (especially important after parsing or switching | |
1431 | * the baud rate). | |
1432 | */ | |
1683f6bf DWF |
1433 | if ((op->flags & F_VCONSOLE) == 0) |
1434 | sleep(1); | |
53d55042 | 1435 | tcflush(STDIN_FILENO, TCIFLUSH); |
70bedfa1 | 1436 | |
1683f6bf DWF |
1437 | eightbit = (op->flags & F_EIGHTBITS); |
1438 | bp = logname; | |
1439 | *bp = '\0'; | |
1440 | ||
1441 | while (*logname == '\0') { | |
1442 | ||
1443 | /* Write issue file and prompt */ | |
70bedfa1 KZ |
1444 | do_prompt(op, tp); |
1445 | ||
1683f6bf DWF |
1446 | cp->eol = '\0'; |
1447 | ||
1448 | /* Read name, watch for break and end-of-line. */ | |
1449 | while (cp->eol == '\0') { | |
1450 | ||
cb872ac9 KZ |
1451 | char key; |
1452 | ||
763d7a87 | 1453 | if (read(STDIN_FILENO, &c, 1) < 1) { |
1683f6bf | 1454 | |
714cff30 KZ |
1455 | /* The terminal could be open with O_NONBLOCK when |
1456 | * -L (force CLOCAL) is specified... */ | |
1683f6bf | 1457 | if (errno == EINTR || errno == EAGAIN) { |
714cff30 | 1458 | usleep(250000); |
1683f6bf DWF |
1459 | continue; |
1460 | } | |
1461 | switch (errno) { | |
1462 | case 0: | |
1463 | case EIO: | |
1464 | case ESRCH: | |
1465 | case EINVAL: | |
1466 | case ENOENT: | |
1467 | break; | |
1468 | default: | |
1469 | log_err(_("%s: read: %m"), op->tty); | |
1470 | } | |
70bedfa1 | 1471 | } |
1683f6bf | 1472 | |
70bedfa1 | 1473 | /* Do parity bit handling. */ |
1683f6bf | 1474 | if (eightbit) |
70bedfa1 | 1475 | ascval = c; |
1683f6bf DWF |
1476 | else if (c != (ascval = (c & 0177))) { |
1477 | uint32_t bits; /* # of "1" bits per character */ | |
1478 | uint32_t mask; /* mask with 1 bit up */ | |
1479 | for (bits = 1, mask = 1; mask & 0177; mask <<= 1) { | |
70bedfa1 | 1480 | if (mask & ascval) |
53d55042 | 1481 | bits++; |
1683f6bf | 1482 | } |
70bedfa1 KZ |
1483 | cp->parity |= ((bits & 1) ? 1 : 2); |
1484 | } | |
1683f6bf | 1485 | |
cb872ac9 KZ |
1486 | if (op->killchars && strchr(op->killchars, ascval)) |
1487 | key = CTL('U'); | |
1488 | else if (op->erasechars && strchr(op->erasechars, ascval)) | |
1489 | key = DEL; | |
1490 | else | |
1491 | key = ascval; | |
1492 | ||
70bedfa1 | 1493 | /* Do erase, kill and end-of-line processing. */ |
cb872ac9 | 1494 | switch (key) { |
1683f6bf DWF |
1495 | case 0: |
1496 | *bp = 0; | |
1497 | if (op->numspeed > 1) | |
4a9b7543 | 1498 | return NULL; |
1683f6bf | 1499 | break; |
70bedfa1 KZ |
1500 | case CR: |
1501 | case NL: | |
1683f6bf DWF |
1502 | *bp = 0; /* terminate logname */ |
1503 | cp->eol = ascval; /* set end-of-line char */ | |
70bedfa1 KZ |
1504 | break; |
1505 | case BS: | |
1506 | case DEL: | |
1683f6bf | 1507 | cp->erase = ascval; /* set erase character */ |
70bedfa1 | 1508 | if (bp > logname) { |
b9261127 | 1509 | if ((tp->c_lflag & ECHO) == 0) |
1683f6bf | 1510 | write_all(1, erase[cp->parity], 3); |
70bedfa1 KZ |
1511 | bp--; |
1512 | } | |
1513 | break; | |
1514 | case CTL('U'): | |
1683f6bf | 1515 | cp->kill = ascval; /* set kill character */ |
70bedfa1 | 1516 | while (bp > logname) { |
b9261127 | 1517 | if ((tp->c_lflag & ECHO) == 0) |
1683f6bf | 1518 | write_all(1, erase[cp->parity], 3); |
70bedfa1 KZ |
1519 | bp--; |
1520 | } | |
1521 | break; | |
1522 | case CTL('D'): | |
1523 | exit(EXIT_SUCCESS); | |
1524 | default: | |
1683f6bf DWF |
1525 | if (!isascii(ascval) || !isprint(ascval)) |
1526 | break; | |
1527 | if ((size_t)(bp - logname) >= sizeof(logname) - 1) | |
bde20e1b | 1528 | log_err(_("%s: input overrun"), op->tty); |
b9261127 | 1529 | if ((tp->c_lflag & ECHO) == 0) |
1683f6bf DWF |
1530 | write_all(1, &c, 1); /* echo the character */ |
1531 | *bp++ = ascval; /* and store it */ | |
70bedfa1 KZ |
1532 | break; |
1533 | } | |
6dbe3af9 | 1534 | } |
6dbe3af9 | 1535 | } |
1683f6bf DWF |
1536 | #ifdef HAVE_WIDECHAR |
1537 | if ((op->flags & (F_EIGHTBITS|F_UTF8)) == (F_EIGHTBITS|F_UTF8)) { | |
1538 | /* Check out UTF-8 multibyte characters */ | |
1539 | ssize_t len; | |
1540 | wchar_t *wcs, *wcp; | |
1541 | ||
1542 | len = mbstowcs((wchar_t *)0, logname, 0); | |
1543 | if (len < 0) | |
8c219bf4 | 1544 | log_err(_("%s: invalid character conversion for login name"), op->tty); |
1683f6bf | 1545 | |
ca8e91a4 KZ |
1546 | wcs = (wchar_t *) malloc((len + 1) * sizeof(wchar_t)); |
1547 | if (!wcs) | |
1548 | log_err(_("failed to allocate memory: %m")); | |
1683f6bf DWF |
1549 | |
1550 | len = mbstowcs(wcs, logname, len + 1); | |
1551 | if (len < 0) | |
8c219bf4 | 1552 | log_err(_("%s: invalid character conversion for login name"), op->tty); |
1683f6bf DWF |
1553 | |
1554 | wcp = wcs; | |
1555 | while (*wcp) { | |
1556 | const wint_t wc = *wcp++; | |
1557 | if (!iswprint(wc)) | |
8c219bf4 | 1558 | log_err(_("%s: invalid character 0x%x in login name"), op->tty, wc); |
1683f6bf DWF |
1559 | } |
1560 | free(wcs); | |
1561 | } else | |
1562 | #endif | |
1563 | if ((op->flags & F_LCUC) && (cp->capslock = caps_lock(logname))) { | |
1564 | ||
1565 | /* Handle names with upper case and no lower case. */ | |
70bedfa1 KZ |
1566 | for (bp = logname; *bp; bp++) |
1567 | if (isupper(*bp)) | |
1683f6bf DWF |
1568 | *bp = tolower(*bp); /* map name to lower case */ |
1569 | } | |
1570 | ||
70bedfa1 | 1571 | return logname; |
6dbe3af9 KZ |
1572 | } |
1573 | ||
53d55042 | 1574 | /* Set the final tty mode bits. */ |
bde20e1b | 1575 | static void termio_final(struct options *op, struct termios *tp, struct chardata *cp) |
6dbe3af9 | 1576 | { |
70bedfa1 | 1577 | /* General terminal-independent stuff. */ |
53d55042 SK |
1578 | |
1579 | /* 2-way flow control */ | |
1580 | tp->c_iflag |= IXON | IXOFF; | |
1581 | tp->c_lflag |= ICANON | ISIG | ECHO | ECHOE | ECHOK | ECHOKE; | |
1582 | /* no longer| ECHOCTL | ECHOPRT */ | |
70bedfa1 KZ |
1583 | tp->c_oflag |= OPOST; |
1584 | /* tp->c_cflag = 0; */ | |
53d55042 SK |
1585 | tp->c_cc[VINTR] = DEF_INTR; |
1586 | tp->c_cc[VQUIT] = DEF_QUIT; | |
1587 | tp->c_cc[VEOF] = DEF_EOF; | |
70bedfa1 | 1588 | tp->c_cc[VEOL] = DEF_EOL; |
fd6b7a7f | 1589 | #ifdef __linux__ |
53d55042 | 1590 | tp->c_cc[VSWTC] = DEF_SWITCH; |
1961482a | 1591 | #elif defined(VSWTCH) |
53d55042 SK |
1592 | tp->c_cc[VSWTCH] = DEF_SWITCH; |
1593 | #endif /* __linux__ */ | |
6dbe3af9 | 1594 | |
70bedfa1 KZ |
1595 | /* Account for special characters seen in input. */ |
1596 | if (cp->eol == CR) { | |
53d55042 SK |
1597 | tp->c_iflag |= ICRNL; |
1598 | tp->c_oflag |= ONLCR; | |
70bedfa1 | 1599 | } |
53d55042 SK |
1600 | tp->c_cc[VERASE] = cp->erase; |
1601 | tp->c_cc[VKILL] = cp->kill; | |
70bedfa1 KZ |
1602 | |
1603 | /* Account for the presence or absence of parity bits in input. */ | |
1604 | switch (cp->parity) { | |
53d55042 SK |
1605 | case 0: |
1606 | /* space (always 0) parity */ | |
1607 | break; | |
1608 | case 1: | |
1609 | /* odd parity */ | |
1610 | tp->c_cflag |= PARODD; | |
1611 | /* do not break */ | |
1612 | case 2: | |
1613 | /* even parity */ | |
1614 | tp->c_cflag |= PARENB; | |
1615 | tp->c_iflag |= INPCK | ISTRIP; | |
1616 | /* do not break */ | |
1617 | case (1 | 2): | |
1618 | /* no parity bit */ | |
1619 | tp->c_cflag &= ~CSIZE; | |
1620 | tp->c_cflag |= CS7; | |
1621 | break; | |
70bedfa1 KZ |
1622 | } |
1623 | /* Account for upper case without lower case. */ | |
1624 | if (cp->capslock) { | |
ee519041 | 1625 | #ifdef IUCLC |
70bedfa1 | 1626 | tp->c_iflag |= IUCLC; |
ee519041 | 1627 | #endif |
b75c8134 | 1628 | #ifdef XCASE |
70bedfa1 | 1629 | tp->c_lflag |= XCASE; |
1961482a | 1630 | #endif |
ee519041 | 1631 | #ifdef OLCUC |
70bedfa1 | 1632 | tp->c_oflag |= OLCUC; |
ee519041 | 1633 | #endif |
70bedfa1 | 1634 | } |
53d55042 | 1635 | /* Optionally enable hardware flow control. */ |
6dbe3af9 | 1636 | #ifdef CRTSCTS |
70bedfa1 KZ |
1637 | if (op->flags & F_RTSCTS) |
1638 | tp->c_cflag |= CRTSCTS; | |
6dbe3af9 KZ |
1639 | #endif |
1640 | ||
53d55042 | 1641 | /* Finally, make the new settings effective. */ |
70bedfa1 | 1642 | if (tcsetattr(STDIN_FILENO, TCSANOW, tp) < 0) |
8c219bf4 | 1643 | log_err(_("%s: failed to set terminal attributes: %m"), op->tty); |
6dbe3af9 KZ |
1644 | } |
1645 | ||
53d55042 SK |
1646 | /* |
1647 | * String contains upper case without lower case. | |
1648 | * http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=52940 | |
1649 | * http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=156242 | |
1650 | */ | |
bde20e1b | 1651 | static int caps_lock(char *s) |
6dbe3af9 | 1652 | { |
53d55042 | 1653 | int capslock; |
70bedfa1 KZ |
1654 | |
1655 | for (capslock = 0; *s; s++) { | |
1656 | if (islower(*s)) | |
1657 | return EXIT_SUCCESS; | |
1658 | if (capslock == 0) | |
1659 | capslock = isupper(*s); | |
1660 | } | |
1661 | return capslock; | |
6dbe3af9 KZ |
1662 | } |
1663 | ||
53d55042 | 1664 | /* Convert speed string to speed code; return 0 on failure. */ |
bde20e1b | 1665 | static speed_t bcode(char *s) |
6dbe3af9 | 1666 | { |
1a204cd2 | 1667 | const struct Speedtab *sp; |
53d55042 | 1668 | long speed = atol(s); |
6dbe3af9 | 1669 | |
70bedfa1 KZ |
1670 | for (sp = speedtab; sp->speed; sp++) |
1671 | if (sp->speed == speed) | |
1672 | return sp->code; | |
1673 | return 0; | |
6dbe3af9 KZ |
1674 | } |
1675 | ||
7d368556 | 1676 | static void __attribute__ ((__noreturn__)) usage(FILE *out) |
6dbe3af9 | 1677 | { |
7d368556 | 1678 | fputs(USAGE_HEADER, out); |
4cfda3dc | 1679 | fprintf(out, _(" %1$s [options] line [baud_rate,...] [termtype]\n" |
7d368556 SK |
1680 | " %1$s [options] baud_rate,... line [termtype]\n"), program_invocation_short_name); |
1681 | fputs(USAGE_OPTIONS, out); | |
1682 | fputs(_(" -8, --8bits assume 8-bit tty\n"), out); | |
1683 | fputs(_(" -a, --autologin <user> login the specified user automatically\n"), out); | |
1684 | fputs(_(" -c, --noreset do not reset control mode\n"), out); | |
1505a0b2 | 1685 | fputs(_(" -E, --remote use -r <hostname> for login(1)\n"), out); |
7d368556 SK |
1686 | fputs(_(" -f, --issue-file <file> display issue file\n"), out); |
1687 | fputs(_(" -h, --flow-control enable hardware flow control\n"), out); | |
1688 | fputs(_(" -H, --host <hostname> specify login host\n"), out); | |
1689 | fputs(_(" -i, --noissue do not display issue file\n"), out); | |
1690 | fputs(_(" -I, --init-string <string> set init string\n"), out); | |
1691 | fputs(_(" -l, --login-program <file> specify login program\n"), out); | |
ef264c83 | 1692 | fputs(_(" -L, --local-line[=<mode>] cotrol local line flag\n"), out); |
7d368556 SK |
1693 | fputs(_(" -m, --extract-baud extract baud rate during connect\n"), out); |
1694 | fputs(_(" -n, --skip-login do not prompt for login\n"), out); | |
1695 | fputs(_(" -o, --login-options <opts> options that are passed to login\n"), out); | |
a056cfe2 | 1696 | fputs(_(" -p, --login-pause wait for any key before the login\n"), out); |
4b856ee4 | 1697 | fputs(_(" -r, --chroot <dir> change root to the directory\n"), out); |
7d368556 SK |
1698 | fputs(_(" -R, --hangup do virtually hangup on the tty\n"), out); |
1699 | fputs(_(" -s, --keep-baud try to keep baud rate after break\n"), out); | |
1700 | fputs(_(" -t, --timeout <number> login process timeout\n"), out); | |
1701 | fputs(_(" -U, --detect-case detect uppercase terminal\n"), out); | |
1702 | fputs(_(" -w, --wait-cr wait carriage-return\n"), out); | |
1703 | fputs(_(" --noclear do not clear the screen before prompt\n"), out); | |
1704 | fputs(_(" --nohints do not print hints\n"), out); | |
1705 | fputs(_(" --nonewline do not print a newline before issue\n"), out); | |
a056cfe2 | 1706 | fputs(_(" --nohostname no hostname at all will be shown\n"), out); |
7d368556 SK |
1707 | fputs(_(" --long-hostname show full qualified hostname\n"), out); |
1708 | fputs(_(" --erase-chars <string> additional backspace chars\n"), out); | |
1709 | fputs(_(" --kill-chars <string> additional kill chars\n"), out); | |
86ad1432 SK |
1710 | fputs(_(" --help display this help and exit\n"), out); |
1711 | fputs(_(" --version output version information and exit\n"), out); | |
7d368556 | 1712 | fprintf(out, USAGE_MAN_TAIL("agetty(8)")); |
70bedfa1 KZ |
1713 | |
1714 | exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS); | |
6dbe3af9 KZ |
1715 | } |
1716 | ||
bde20e1b WF |
1717 | /* |
1718 | * Helper function reports errors to console or syslog. | |
1719 | * Will be used by log_err() and log_warn() therefore | |
1720 | * it takes a format as well as va_list. | |
1721 | */ | |
6dbe3af9 KZ |
1722 | #define str2cpy(b,s1,s2) strcat(strcpy(b,s1),s2) |
1723 | ||
bde20e1b | 1724 | static void dolog(int priority, const char *fmt, va_list ap) |
53d55042 | 1725 | { |
6dbe3af9 | 1726 | #ifndef USE_SYSLOG |
53d55042 | 1727 | int fd; |
6dbe3af9 | 1728 | #endif |
53d55042 SK |
1729 | char buf[BUFSIZ]; |
1730 | char *bp; | |
6dbe3af9 | 1731 | |
70bedfa1 KZ |
1732 | /* |
1733 | * If the diagnostic is reported via syslog(3), the process name is | |
1734 | * automatically prepended to the message. If we write directly to | |
1735 | * /dev/console, we must prepend the process name ourselves. | |
1736 | */ | |
6dbe3af9 | 1737 | #ifdef USE_SYSLOG |
70bedfa1 KZ |
1738 | buf[0] = '\0'; |
1739 | bp = buf; | |
6dbe3af9 | 1740 | #else |
53d55042 | 1741 | str2cpy(buf, program_invocation_short_name, ": "); |
70bedfa1 | 1742 | bp = buf + strlen(buf); |
53d55042 | 1743 | #endif /* USE_SYSLOG */ |
763d7a87 | 1744 | vsnprintf(bp, sizeof(buf)-strlen(buf), fmt, ap); |
6dbe3af9 | 1745 | |
70bedfa1 KZ |
1746 | /* |
1747 | * Write the diagnostic directly to /dev/console if we do not use the | |
1748 | * syslog(3) facility. | |
1749 | */ | |
6dbe3af9 | 1750 | #ifdef USE_SYSLOG |
53d55042 | 1751 | openlog(program_invocation_short_name, LOG_PID, LOG_AUTHPRIV); |
bde20e1b | 1752 | syslog(priority, "%s", buf); |
70bedfa1 | 1753 | closelog(); |
6dbe3af9 | 1754 | #else |
70bedfa1 | 1755 | /* Terminate with CR-LF since the console mode is unknown. */ |
53d55042 | 1756 | strcat(bp, "\r\n"); |
70bedfa1 | 1757 | if ((fd = open("/dev/console", 1)) >= 0) { |
729def03 | 1758 | write_all(fd, buf, strlen(buf)); |
53d55042 | 1759 | close(fd); |
70bedfa1 | 1760 | } |
53d55042 | 1761 | #endif /* USE_SYSLOG */ |
bde20e1b WF |
1762 | } |
1763 | ||
1764 | static void log_err(const char *fmt, ...) | |
1765 | { | |
1766 | va_list ap; | |
1767 | ||
1768 | va_start(ap, fmt); | |
1769 | dolog(LOG_ERR, fmt, ap); | |
1770 | va_end(ap); | |
1771 | ||
53d55042 SK |
1772 | /* Be kind to init(8). */ |
1773 | sleep(10); | |
70bedfa1 | 1774 | exit(EXIT_FAILURE); |
6dbe3af9 | 1775 | } |
bde20e1b WF |
1776 | |
1777 | static void log_warn(const char *fmt, ...) | |
1778 | { | |
1779 | va_list ap; | |
1780 | ||
1781 | va_start(ap, fmt); | |
1782 | dolog(LOG_WARNING, fmt, ap); | |
1783 | va_end(ap); | |
1784 | } | |
729def03 | 1785 | |
2b945eda KZ |
1786 | static void output_iface_ip(struct ifaddrs *addrs, const char *iface, sa_family_t family) |
1787 | { | |
1788 | if (!iface) | |
1789 | return; | |
1790 | ||
1791 | if (addrs->ifa_name | |
1792 | && strcmp(addrs->ifa_name, iface) == 0 | |
1793 | && addrs->ifa_addr | |
1794 | && addrs->ifa_addr->sa_family == family) { | |
1795 | ||
1796 | void *addr = NULL; | |
1797 | char buff[INET6_ADDRSTRLEN + 1]; | |
1798 | ||
1799 | switch (addrs->ifa_addr->sa_family) { | |
1800 | case AF_INET: | |
1801 | addr = &((struct sockaddr_in *) addrs->ifa_addr)->sin_addr; | |
1802 | break; | |
1803 | case AF_INET6: | |
1804 | addr = &((struct sockaddr_in6 *) addrs->ifa_addr)->sin6_addr; | |
1805 | break; | |
1806 | } | |
1807 | if (addr) { | |
1808 | inet_ntop(addrs->ifa_addr->sa_family, addr, buff, sizeof(buff)); | |
1809 | printf("%s", buff); | |
1810 | } | |
1811 | ||
1812 | } else if (addrs->ifa_next) | |
1813 | output_iface_ip(addrs->ifa_next, iface, family); | |
1814 | } | |
1815 | ||
1816 | static void output_ip(sa_family_t family) | |
1817 | { | |
2448f336 | 1818 | char *host; |
2b945eda KZ |
1819 | struct addrinfo hints, *info = NULL; |
1820 | ||
1821 | memset(&hints, 0, sizeof(hints)); | |
1822 | hints.ai_family = family; | |
1823 | if (family == AF_INET6) | |
1824 | hints.ai_flags = AI_V4MAPPED; | |
1825 | ||
2448f336 KZ |
1826 | host = xgethostname(); |
1827 | if (host && getaddrinfo(host, NULL, &hints, &info) == 0 && info) { | |
2b945eda KZ |
1828 | |
1829 | void *addr = NULL; | |
2b945eda KZ |
1830 | |
1831 | switch (info->ai_family) { | |
1832 | case AF_INET: | |
1833 | addr = &((struct sockaddr_in *) info->ai_addr)->sin_addr; | |
1834 | break; | |
1835 | case AF_INET6: | |
1836 | addr = &((struct sockaddr_in6 *) info->ai_addr)->sin6_addr; | |
1837 | break; | |
1838 | } | |
915c1d99 KZ |
1839 | if (addr) { |
1840 | char buff[INET6_ADDRSTRLEN + 1]; | |
1841 | ||
1842 | inet_ntop(info->ai_family, (void *) addr, buff, sizeof(buff)); | |
1843 | printf("%s", buff); | |
1844 | } | |
2b945eda KZ |
1845 | |
1846 | freeaddrinfo(info); | |
1847 | } | |
2448f336 | 1848 | free(host); |
2b945eda KZ |
1849 | } |
1850 | ||
1851 | /* | |
1852 | * parses \x{argument}, if not argument specified then returns NULL, the @fd | |
1853 | * has to point to one char after the sequence (it means '{'). | |
1854 | */ | |
1855 | static char *get_escape_argument(FILE *fd, char *buf, size_t bufsz) | |
1856 | { | |
1857 | size_t i = 0; | |
1858 | int c = fgetc(fd); | |
1859 | ||
1860 | if (c == EOF || (unsigned char) c != '{') { | |
1861 | ungetc(c, fd); | |
1862 | return NULL; | |
1863 | } | |
1864 | ||
1865 | do { | |
1866 | c = fgetc(fd); | |
1867 | if (c == EOF) | |
1868 | return NULL; | |
1869 | if ((unsigned char) c != '}' && i < bufsz - 1) | |
1870 | buf[i++] = (unsigned char) c; | |
1871 | ||
1872 | } while ((unsigned char) c != '}'); | |
1873 | ||
1874 | buf[i] = '\0'; | |
1875 | return buf; | |
1876 | } | |
1877 | ||
729def03 | 1878 | static void output_special_char(unsigned char c, struct options *op, |
2b945eda | 1879 | struct termios *tp, FILE *fp) |
729def03 WF |
1880 | { |
1881 | struct utsname uts; | |
763d7a87 KZ |
1882 | |
1883 | uname(&uts); | |
3aa6b68f | 1884 | |
729def03 WF |
1885 | switch (c) { |
1886 | case 's': | |
763d7a87 | 1887 | printf("%s", uts.sysname); |
729def03 WF |
1888 | break; |
1889 | case 'n': | |
763d7a87 | 1890 | printf("%s", uts.nodename); |
729def03 WF |
1891 | break; |
1892 | case 'r': | |
763d7a87 | 1893 | printf("%s", uts.release); |
729def03 WF |
1894 | break; |
1895 | case 'v': | |
763d7a87 | 1896 | printf("%s", uts.version); |
729def03 WF |
1897 | break; |
1898 | case 'm': | |
763d7a87 | 1899 | printf("%s", uts.machine); |
729def03 WF |
1900 | break; |
1901 | case 'o': | |
1902 | { | |
2448f336 KZ |
1903 | char *dom = xgetdomainname(); |
1904 | ||
1905 | fputs(dom ? dom : "unknown_domain", stdout); | |
1906 | free(dom); | |
729def03 WF |
1907 | break; |
1908 | } | |
1909 | case 'O': | |
1910 | { | |
2448f336 KZ |
1911 | char *dom = NULL; |
1912 | char *host = xgethostname(); | |
729def03 WF |
1913 | struct addrinfo hints, *info = NULL; |
1914 | ||
1915 | memset(&hints, 0, sizeof(hints)); | |
1916 | hints.ai_flags = AI_CANONNAME; | |
1917 | ||
2448f336 | 1918 | if (host && getaddrinfo(host, NULL, &hints, &info) == 0 && info) { |
729def03 | 1919 | char *canon; |
2448f336 | 1920 | |
729def03 WF |
1921 | if (info->ai_canonname && |
1922 | (canon = strchr(info->ai_canonname, '.'))) | |
1923 | dom = canon + 1; | |
729def03 | 1924 | } |
2448f336 KZ |
1925 | fputs(dom ? dom : "unknown_domain", stdout); |
1926 | if (info) | |
1927 | freeaddrinfo(info); | |
1928 | free(host); | |
729def03 WF |
1929 | break; |
1930 | } | |
1931 | case 'd': | |
1932 | case 't': | |
1933 | { | |
1934 | time_t now; | |
1935 | struct tm *tm; | |
1936 | ||
763d7a87 | 1937 | time(&now); |
729def03 WF |
1938 | tm = localtime(&now); |
1939 | ||
d9201203 KZ |
1940 | if (!tm) |
1941 | break; | |
1942 | ||
729def03 | 1943 | if (c == 'd') /* ISO 8601 */ |
763d7a87 | 1944 | printf("%s %s %d %d", |
729def03 WF |
1945 | nl_langinfo(ABDAY_1 + tm->tm_wday), |
1946 | nl_langinfo(ABMON_1 + tm->tm_mon), | |
1947 | tm->tm_mday, | |
1948 | tm->tm_year < 70 ? tm->tm_year + 2000 : | |
1949 | tm->tm_year + 1900); | |
1950 | else | |
763d7a87 | 1951 | printf("%02d:%02d:%02d", |
729def03 WF |
1952 | tm->tm_hour, tm->tm_min, tm->tm_sec); |
1953 | break; | |
1954 | } | |
1955 | case 'l': | |
763d7a87 | 1956 | printf ("%s", op->tty); |
729def03 WF |
1957 | break; |
1958 | case 'b': | |
1959 | { | |
1960 | const speed_t speed = cfgetispeed(tp); | |
1961 | int i; | |
1962 | ||
1963 | for (i = 0; speedtab[i].speed; i++) { | |
1964 | if (speedtab[i].code == speed) { | |
1965 | printf("%ld", speedtab[i].speed); | |
1966 | break; | |
1967 | } | |
1968 | } | |
1969 | break; | |
1970 | } | |
1971 | case 'u': | |
1972 | case 'U': | |
1973 | { | |
1974 | int users = 0; | |
1975 | struct utmp *ut; | |
1976 | setutent(); | |
1977 | while ((ut = getutent())) | |
1978 | if (ut->ut_type == USER_PROCESS) | |
1979 | users++; | |
1980 | endutent(); | |
729def03 | 1981 | if (c == 'U') |
9e531400 BS |
1982 | printf(P_("%d user", "%d users", users), users); |
1983 | else | |
1984 | printf ("%d ", users); | |
729def03 WF |
1985 | break; |
1986 | } | |
2b945eda KZ |
1987 | case '4': |
1988 | case '6': | |
1989 | { | |
1990 | sa_family_t family = c == '4' ? AF_INET : AF_INET6; | |
1991 | char iface[128]; | |
1992 | ||
1993 | if (get_escape_argument(fp, iface, sizeof(iface))) { /* interface IP */ | |
1994 | struct ifaddrs *addrs; | |
1995 | int status = getifaddrs(&addrs); | |
1996 | if (status != 0) | |
1997 | break; | |
1998 | output_iface_ip(addrs, iface, family); | |
1999 | freeifaddrs(addrs); | |
2000 | } else /* host IP */ | |
2001 | output_ip(family); | |
2002 | break; | |
2003 | } | |
729def03 | 2004 | default: |
763d7a87 | 2005 | putchar(c); |
729def03 WF |
2006 | break; |
2007 | } | |
2008 | } | |
2009 | ||
2010 | static void init_special_char(char* arg, struct options *op) | |
2011 | { | |
2012 | char ch, *p, *q; | |
2013 | int i; | |
2014 | ||
ca8e91a4 KZ |
2015 | op->initstring = malloc(strlen(arg) + 1); |
2016 | if (!op->initstring) | |
2017 | log_err(_("failed to allocate memory: %m")); | |
729def03 WF |
2018 | |
2019 | /* | |
2020 | * Copy optarg into op->initstring decoding \ddd octal | |
2021 | * codes into chars. | |
2022 | */ | |
2023 | q = op->initstring; | |
2024 | p = arg; | |
2025 | while (*p) { | |
2026 | /* The \\ is converted to \ */ | |
2027 | if (*p == '\\') { | |
2028 | p++; | |
2029 | if (*p == '\\') { | |
2030 | ch = '\\'; | |
2031 | p++; | |
2032 | } else { | |
2033 | /* Handle \000 - \177. */ | |
2034 | ch = 0; | |
2035 | for (i = 1; i <= 3; i++) { | |
2036 | if (*p >= '0' && *p <= '7') { | |
2037 | ch <<= 3; | |
2038 | ch += *p - '0'; | |
2039 | p++; | |
2040 | } else { | |
2041 | break; | |
2042 | } | |
2043 | } | |
2044 | } | |
2045 | *q++ = ch; | |
2046 | } else | |
2047 | *q++ = *p++; | |
2048 | } | |
2049 | *q = '\0'; | |
2050 | } | |
eb8e1f9f | 2051 | |
a694957a KZ |
2052 | /* |
2053 | * Appends @str to @dest and if @dest is not empty then use use @sep as a | |
2054 | * separator. The maximal final length of the @dest is @len. | |
2055 | * | |
2056 | * Returns the final @dest length or -1 in case of error. | |
2057 | */ | |
2058 | static ssize_t append(char *dest, size_t len, const char *sep, const char *src) | |
2059 | { | |
2060 | size_t dsz = 0, ssz = 0, sz; | |
2061 | char *p; | |
2062 | ||
2063 | if (!dest || !len || !src) | |
2064 | return -1; | |
2065 | ||
2066 | if (*dest) | |
2067 | dsz = strlen(dest); | |
2068 | if (dsz && sep) | |
2069 | ssz = strlen(sep); | |
2070 | sz = strlen(src); | |
2071 | ||
2072 | if (dsz + ssz + sz + 1 > len) | |
2073 | return -1; | |
2074 | ||
2075 | p = dest + dsz; | |
2076 | if (ssz) { | |
2077 | memcpy(p, sep, ssz); | |
2078 | p += ssz; | |
2079 | } | |
2080 | memcpy(p, src, sz); | |
2081 | *(p + sz) = '\0'; | |
2082 | ||
2083 | return dsz + ssz + sz; | |
2084 | } | |
9aeb66dc | 2085 | |
eb8e1f9f WF |
2086 | /* |
2087 | * Do not allow the user to pass an option as a user name | |
2088 | * To be more safe: Use `--' to make sure the rest is | |
2089 | * interpreted as non-options by the program, if it supports it. | |
2090 | */ | |
9aeb66dc | 2091 | static void check_username(const char* nm) |
eb8e1f9f WF |
2092 | { |
2093 | const char *p = nm; | |
2094 | if (!nm) | |
2095 | goto err; | |
763d7a87 | 2096 | if (strlen(nm) > 42) |
eb8e1f9f | 2097 | goto err; |
763d7a87 | 2098 | while (isspace(*p)) |
eb8e1f9f WF |
2099 | p++; |
2100 | if (*p == '-') | |
2101 | goto err; | |
2102 | return; | |
2103 | err: | |
2104 | errno = EPERM; | |
8c219bf4 | 2105 | log_err(_("checkname failed: %m")); |
eb8e1f9f WF |
2106 | } |
2107 |