2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 * main.c: Unix main routine
18 * Copyright (c) 2008 Eliot Dresselhaus
20 * Permission is hereby granted, free of charge, to any person obtaining
21 * a copy of this software and associated documentation files (the
22 * "Software"), to deal in the Software without restriction, including
23 * without limitation the rights to use, copy, modify, merge, publish,
24 * distribute, sublicense, and/or sell copies of the Software, and to
25 * permit persons to whom the Software is furnished to do so, subject to
26 * the following conditions:
28 * The above copyright notice and this permission notice shall be
29 * included in all copies or substantial portions of the Software.
31 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
35 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
36 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
37 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
39 #include <vlib/vlib.h>
40 #include <vlib/unix/unix.h>
41 #include <vlib/unix/plugin.h>
44 #include <sys/ucontext.h>
46 #include <sys/types.h>
50 #include <sys/resource.h>
53 /** Default CLI pager limit is not configured in startup.conf */
54 #define UNIX_CLI_DEFAULT_PAGER_LIMIT 100000
56 /** Default CLI history depth if not configured in startup.conf */
57 #define UNIX_CLI_DEFAULT_HISTORY 50
60 unix_main_t unix_main;
63 unix_main_init (vlib_main_t * vm)
65 unix_main_t *um = &unix_main;
67 return vlib_call_init_function (vm, unix_input_init);
70 VLIB_INIT_FUNCTION (unix_main_init);
73 unix_signal_handler (int signum, siginfo_t * si, ucontext_t * uc)
78 msg = format (msg, "received signal %U, PC %U",
79 format_signal, signum, format_ucontext_pc, uc);
81 if (signum == SIGSEGV)
82 msg = format (msg, ", faulting address %p", si->si_addr);
86 /* these (caught) signals cause the application to exit */
88 if (unix_main.vlib_main->main_loop_exit_set)
90 syslog (LOG_ERR | LOG_DAEMON, "received SIGTERM, exiting...");
92 clib_longjmp (&unix_main.vlib_main->main_loop_exit,
93 VLIB_MAIN_LOOP_EXIT_CLI);
106 /* by default, print a message and continue */
112 /* Null terminate. */
117 syslog (LOG_ERR | LOG_DAEMON, "%s", msg);
121 clib_warning ("%s", msg);
126 static clib_error_t *
127 setup_signal_handlers (unix_main_t * um)
132 for (i = 1; i < 32; i++)
134 memset (&sa, 0, sizeof (sa));
135 sa.sa_sigaction = (void *) unix_signal_handler;
136 sa.sa_flags = SA_SIGINFO;
140 /* these signals take the default action */
148 /* ignore SIGPIPE, SIGCHLD */
151 sa.sa_sigaction = (void *) SIG_IGN;
154 /* catch and handle all other signals */
159 if (sigaction (i, &sa, 0) < 0)
160 return clib_error_return_unix (0, "sigaction %U", format_signal, i);
167 unix_error_handler (void *arg, u8 * msg, int msg_len)
169 unix_main_t *um = arg;
171 /* Echo to stderr when interactive. */
172 if (um->flags & UNIX_FLAG_INTERACTIVE)
174 CLIB_UNUSED (int r) = write (2, msg, msg_len);
178 char save = msg[msg_len - 1];
180 /* Null Terminate. */
181 msg[msg_len - 1] = 0;
183 syslog (LOG_ERR | LOG_DAEMON, "%s", msg);
185 msg[msg_len - 1] = save;
190 vlib_unix_error_report (vlib_main_t * vm, clib_error_t * error)
192 unix_main_t *um = &unix_main;
194 if (um->flags & UNIX_FLAG_INTERACTIVE || error == 0)
203 msg_len = vec_len (msg);
205 /* Null Terminate. */
206 save = msg[msg_len - 1];
207 msg[msg_len - 1] = 0;
209 syslog (LOG_ERR | LOG_DAEMON, "%s", msg);
211 msg[msg_len - 1] = save;
216 startup_config_process (vlib_main_t * vm,
217 vlib_node_runtime_t * rt, vlib_frame_t * f)
219 unix_main_t *um = &unix_main;
223 vlib_process_suspend (vm, 2.0);
225 while (um->unix_config_complete == 0)
226 vlib_process_suspend (vm, 0.1);
228 if (um->startup_config_filename)
230 unformat_input_t sub_input;
233 char *fn = (char *) um->startup_config_filename;
235 fd = open (fn, O_RDONLY);
238 clib_warning ("failed to open `%s'", fn);
242 if (fstat (fd, &s) < 0)
244 clib_warning ("failed to stat `%s'", fn);
250 if (!(S_ISREG (s.st_mode) || S_ISLNK (s.st_mode)))
252 clib_warning ("not a regular file: `%s'", fn);
259 vec_resize (buf, 4096);
260 n = read (fd, buf + l, 4096);
263 _vec_len (buf) = l + n;
270 if (um->log_fd && vec_len (buf))
273 lv = format (lv, "%U: ***** Startup Config *****\n%v",
274 format_timeval, 0 /* current bat-time */ ,
275 0 /* current bat-format */ ,
278 int rv __attribute__ ((unused)) =
279 write (um->log_fd, lv, vec_len (lv));
281 vec_reset_length (lv);
282 lv = format (lv, "%U: ***** End Startup Config *****\n",
283 format_timeval, 0 /* current bat-time */ ,
284 0 /* current bat-format */ );
286 int rv __attribute__ ((unused)) =
287 write (um->log_fd, lv, vec_len (lv));
294 unformat_init_vector (&sub_input, buf);
295 vlib_cli_input (vm, &sub_input, 0, 0);
296 /* frees buf for us */
297 unformat_free (&sub_input);
305 VLIB_REGISTER_NODE (startup_config_node,static) = {
306 .function = startup_config_process,
307 .type = VLIB_NODE_TYPE_PROCESS,
308 .name = "startup-config-process",
312 static clib_error_t *
313 unix_config (vlib_main_t * vm, unformat_input_t * input)
315 unix_main_t *um = &unix_main;
316 clib_error_t *error = 0;
320 um->cli_pager_buffer_limit = UNIX_CLI_DEFAULT_PAGER_LIMIT;
321 um->cli_history_limit = UNIX_CLI_DEFAULT_HISTORY;
323 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
326 if (unformat (input, "interactive"))
327 um->flags |= UNIX_FLAG_INTERACTIVE;
328 else if (unformat (input, "nodaemon"))
329 um->flags |= UNIX_FLAG_NODAEMON;
330 else if (unformat (input, "cli-prompt %s", &cli_prompt))
331 vlib_unix_cli_set_prompt (cli_prompt);
333 if (unformat (input, "cli-listen %s", &um->cli_listen_socket.config))
335 else if (unformat (input, "cli-line-mode"))
336 um->cli_line_mode = 1;
337 else if (unformat (input, "cli-no-banner"))
338 um->cli_no_banner = 1;
339 else if (unformat (input, "cli-no-pager"))
340 um->cli_no_pager = 1;
341 else if (unformat (input, "cli-pager-buffer-limit %d",
342 &um->cli_pager_buffer_limit))
345 if (unformat (input, "cli-history-limit %d", &um->cli_history_limit))
347 else if (unformat (input, "coredump-size"))
349 uword coredump_size = 0;
350 if (unformat (input, "unlimited"))
352 coredump_size = RLIM_INFINITY;
355 if (!unformat (input, "%U", unformat_memory_size, &coredump_size))
357 return clib_error_return (0,
358 "invalid coredump-size parameter `%U'",
359 format_unformat_error, input);
361 const struct rlimit new_limit = { coredump_size, coredump_size };
362 if (0 != setrlimit (RLIMIT_CORE, &new_limit))
364 clib_unix_warning ("prlimit() failed");
367 else if (unformat (input, "full-coredump"))
371 fd = open ("/proc/self/coredump_filter", O_WRONLY);
374 if (write (fd, "0x6f\n", 5) != 5)
375 clib_unix_warning ("coredump filter write failed!");
379 clib_unix_warning ("couldn't open /proc/self/coredump_filter");
381 else if (unformat (input, "startup-config %s",
382 &um->startup_config_filename))
384 else if (unformat (input, "exec %s", &um->startup_config_filename))
386 else if (unformat (input, "log %s", &um->log_filename))
388 um->log_fd = open ((char *) um->log_filename,
389 O_CREAT | O_WRONLY | O_APPEND, 0644);
392 clib_warning ("couldn't open log '%s'\n", um->log_filename);
398 lv = format (0, "%U: ***** Start: PID %d *****\n",
399 format_timeval, 0 /* current bat-time */ ,
400 0 /* current bat-format */ ,
403 int rv __attribute__ ((unused)) =
404 write (um->log_fd, lv, vec_len (lv));
409 else if (unformat (input, "gid %U", unformat_unix_gid, &gid))
411 if (setegid (gid) == -1)
412 return clib_error_return_unix (0, "setegid");
415 return clib_error_return (0, "unknown input `%U'",
416 format_unformat_error, input);
419 error = setup_signal_handlers (um);
423 if (!(um->flags & UNIX_FLAG_INTERACTIVE))
425 openlog (vm->name, LOG_CONS | LOG_PERROR | LOG_PID, LOG_DAEMON);
426 clib_error_register_handler (unix_error_handler, um);
428 if (!(um->flags & UNIX_FLAG_NODAEMON) && daemon ( /* chdir to / */ 0,
429 /* stdin/stdout/stderr -> /dev/null */
431 clib_error_return (0, "daemon () fails");
433 um->unix_config_complete = 1;
438 /* unix { ... } configuration. */
441 * @cfgcmd{interactive}
442 * Attach CLI to stdin/out and provide a debugging command line interface.
443 * Implies @c nodaemon.
446 * Do not fork or background the VPP process. Typically used when invoking
447 * VPP applications from a process monitor.
449 * @cfgcmd{exec, <filename>}
450 * @par <code>startup-config <filename></code>
451 * Read startup operational configuration from @c filename.
452 * The contents of the file will be performed as though entered at the CLI.
453 * The two keywords are aliases for the same function; if both are specified,
454 * only the last will have an effect.
456 * @cfgcmd{log, <filename>}
457 * Logs the startup configuration and all subsequent CLI commands in
459 * Very useful in situations where folks don't remember or can't be bothered
460 * to include CLI commands in bug reports.
462 * @cfgcmd{full-coredump}
463 * Ask the Linux kernel to dump all memory-mapped address regions, instead
464 * of just text+data+bss.
466 * @cfgcmd{cli-listen, <address:port>}
467 * Bind the CLI to listen at the address and port given. @clocalhost
468 * on TCP port @c 5002, given as <tt>cli-listen localhost:5002</tt>,
471 * @cfgcmd{cli-line-mode}
472 * Disable character-by-character I/O on stdin. Useful when combined with,
473 * for example, <tt>emacs M-x gud-gdb</tt>.
475 * @cfgcmd{cli-prompt, <string>}
476 * Configure the CLI prompt to be @c string.
478 * @cfgcmd{cli-history-limit, <nn>}
479 * Limit commmand history to @c nn lines. A value of @c 0
480 * disables command history. Default value: @c 50
482 * @cfgcmd{cli-no-banner}
483 * Disable the login banner on stdin and Telnet connections.
485 * @cfgcmd{cli-no-pager}
486 * Disable the output pager.
488 * @cfgcmd{cli-pager-buffer-limit, <nn>}
489 * Limit pager buffer to @c nn lines of output.
490 * A value of @c 0 disables the pager. Default value: @c 100000
492 VLIB_CONFIG_FUNCTION (unix_config, "unix");
494 static clib_error_t *
495 unix_exit (vlib_main_t * vm)
497 /* Close syslog connection. */
502 VLIB_MAIN_LOOP_EXIT_FUNCTION (unix_exit);
504 u8 **vlib_thread_stacks;
509 vlib_main_t *vm = (vlib_main_t *) arg;
510 unformat_input_t input;
513 unformat_init_command_line (&input, (char **) vm->argv);
514 i = vlib_main (vm, &input);
515 unformat_free (&input);
521 vlib_thread_stack_init (uword thread_index)
523 vec_validate (vlib_thread_stacks, thread_index);
524 vlib_thread_stacks[thread_index] = clib_mem_alloc_aligned
525 (VLIB_THREAD_STACK_SIZE, VLIB_THREAD_STACK_SIZE);
528 * Disallow writes to the bottom page of the stack, to
529 * catch stack overflows.
531 if (mprotect (vlib_thread_stacks[thread_index],
532 clib_mem_get_page_size (), PROT_READ) < 0)
533 clib_unix_warning ("thread stack");
534 return vlib_thread_stacks[thread_index];
538 vlib_unix_main (int argc, char *argv[])
540 vlib_main_t *vm = &vlib_global_main; /* one and only time for this! */
541 unformat_input_t input;
545 vm->argv = (u8 **) argv;
547 vm->heap_base = clib_mem_get_heap ();
548 ASSERT (vm->heap_base);
550 unformat_init_command_line (&input, (char **) vm->argv);
551 if ((e = vlib_plugin_config (vm, &input)))
553 clib_error_report (e);
556 unformat_free (&input);
558 i = vlib_plugin_early_init (vm);
562 unformat_init_command_line (&input, (char **) vm->argv);
563 if (vm->init_functions_called == 0)
564 vm->init_functions_called = hash_create (0, /* value bytes */ 0);
565 e = vlib_call_all_config_functions (vm, &input, 1 /* early */ );
568 clib_error_report (e);
571 unformat_free (&input);
573 vlib_thread_stack_init (0);
575 __os_thread_index = 0;
577 i = clib_calljmp (thread0, (uword) vm,
578 (void *) (vlib_thread_stacks[0] +
579 VLIB_THREAD_STACK_SIZE));
584 * fd.io coding-style-patch-verification: ON
587 * eval: (c-set-style "gnu")