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 * unix.h: Unix specific main state
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.
40 #ifndef included_unix_unix_h
41 #define included_unix_unix_h
43 #include <vppinfra/socket.h>
47 typedef clib_error_t * (unix_file_function_t) (struct unix_file * f);
49 typedef struct unix_file {
50 /* Unix file descriptor from open/socket. */
54 #define UNIX_FILE_DATA_AVAILABLE_TO_WRITE (1 << 0)
55 #define UNIX_FILE_EVENT_EDGE_TRIGGERED (1 << 1)
57 /* Data available for function's use. */
60 /* Functions to be called when read/write data becomes ready. */
61 unix_file_function_t * read_function, * write_function, * error_function;
67 } unix_error_history_t;
71 UNIX_FILE_UPDATE_MODIFY,
72 UNIX_FILE_UPDATE_DELETE,
73 } unix_file_update_type_t;
76 /* Back pointer to main structure. */
77 vlib_main_t * vlib_main;
80 /* Run interactively or as daemon (background process). */
81 #define UNIX_FLAG_INTERACTIVE (1 << 0)
82 #define UNIX_FLAG_NODAEMON (1 << 1)
84 /* Pool of files to poll for input/output. */
85 unix_file_t * file_pool;
87 /* CLI listen socket. */
88 clib_socket_t cli_listen_socket;
90 void (* file_update) (unix_file_t * file, unix_file_update_type_t update_type);
92 /* Circular buffer of last unix errors. */
93 unix_error_history_t error_history[128];
94 u32 error_history_index;
97 /* startup-config filename */
98 u8 *startup_config_filename;
100 /* unix config complete */
101 volatile int unix_config_complete;
103 /* CLI log file. GIGO. */
107 /* Don't put CLI connections into character mode */
110 /* Maximum amount of command line history to keep per session */
111 u32 cli_history_limit;
113 /* Suppress the welcome banner at CLI session start */
116 /* Maximum pager buffer size */
117 u32 cli_pager_buffer_limit;
119 /* Suppress the pager */
122 /* Store the original state of stdin when it's a tty */
123 struct termios tio_stdin;
127 /* Global main structure. */
128 extern unix_main_t unix_main;
131 unix_file_add (unix_main_t * um, unix_file_t * template)
134 pool_get (um->file_pool, f);
136 um->file_update (f, UNIX_FILE_UPDATE_ADD);
137 return f - um->file_pool;
141 unix_file_del (unix_main_t * um, unix_file_t * f)
143 um->file_update (f, UNIX_FILE_UPDATE_DELETE);
144 close (f->file_descriptor);
145 f->file_descriptor = ~0;
146 pool_put (um->file_pool, f);
150 unix_file_set_data_available_to_write (u32 unix_file_index, uword is_available)
152 unix_file_t * uf = pool_elt_at_index (unix_main.file_pool, unix_file_index);
153 uword was_available = (uf->flags & UNIX_FILE_DATA_AVAILABLE_TO_WRITE);
154 if ((was_available != 0) != (is_available != 0))
156 uf->flags ^= UNIX_FILE_DATA_AVAILABLE_TO_WRITE;
157 unix_main.file_update (uf, UNIX_FILE_UPDATE_MODIFY);
159 return was_available != 0;
163 unix_save_error (unix_main_t * um, clib_error_t * error)
165 unix_error_history_t * eh = um->error_history + um->error_history_index;
166 clib_error_free_vector (eh->error);
168 eh->time = vlib_time_now (um->vlib_main);
169 um->n_total_errors += 1;
170 if (++um->error_history_index >= ARRAY_LEN (um->error_history))
171 um->error_history_index = 0;
174 /* Main function for Unix VLIB. */
175 int vlib_unix_main (int argc, char * argv[]);
177 /* Call to allocate/initialize physical DMA memory subsystem.
178 This is not an init function so that users can explicitly enable/disable
179 physmem when its not needed. */
180 clib_error_t * unix_physmem_init (vlib_main_t * vm,
181 int fail_if_physical_memory_not_present);
184 unix_physmem_is_fake (vlib_main_t * vm)
186 vlib_physmem_main_t * vpm = &vm->physmem_main;
190 /* Set prompt for CLI. */
191 void vlib_unix_cli_set_prompt (char * prompt);
193 static inline unix_main_t * vlib_unix_get_main (void)
198 /* thread stack array; vec_len = max number of threads */
199 u8 **vlib_thread_stacks;
204 vlib_sysfs_write (char * file_name, char * fmt, ...);
207 vlib_sysfs_read (char * file_name, char * fmt, ...);
210 vlib_sysfs_link_to_name(char * link);
213 foreach_directory_file (char * dir_name,
214 clib_error_t * (* f) (void * arg, u8 * path_name,
216 void * arg, int scan_dirs);
218 #endif /* included_unix_unix_h */