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>
46 typedef clib_error_t * (unix_file_function_t) (struct unix_file * f);
48 typedef struct unix_file {
49 /* Unix file descriptor from open/socket. */
53 #define UNIX_FILE_DATA_AVAILABLE_TO_WRITE (1 << 0)
54 #define UNIX_FILE_EVENT_EDGE_TRIGGERED (1 << 1)
56 /* Data available for function's use. */
59 /* Functions to be called when read/write data becomes ready. */
60 unix_file_function_t * read_function, * write_function, * error_function;
66 } unix_error_history_t;
70 UNIX_FILE_UPDATE_MODIFY,
71 UNIX_FILE_UPDATE_DELETE,
72 } unix_file_update_type_t;
75 /* Back pointer to main structure. */
76 vlib_main_t * vlib_main;
79 /* Run interactively or as daemon (background process). */
80 #define UNIX_FLAG_INTERACTIVE (1 << 0)
81 #define UNIX_FLAG_NODAEMON (1 << 1)
83 /* Pool of files to poll for input/output. */
84 unix_file_t * file_pool;
86 /* CLI listen socket. */
87 clib_socket_t cli_listen_socket;
89 void (* file_update) (unix_file_t * file, unix_file_update_type_t update_type);
91 /* Circular buffer of last unix errors. */
92 unix_error_history_t error_history[128];
93 u32 error_history_index;
96 /* startup-config filename */
97 u8 *startup_config_filename;
99 /* unix config complete */
100 volatile int unix_config_complete;
102 /* CLI log file. GIGO. */
105 /* Don't put telnet connections into character mode */
107 u32 cli_history_limit;
111 /* Global main structure. */
112 extern unix_main_t unix_main;
115 unix_file_add (unix_main_t * um, unix_file_t * template)
118 pool_get (um->file_pool, f);
120 um->file_update (f, UNIX_FILE_UPDATE_ADD);
121 return f - um->file_pool;
125 unix_file_del (unix_main_t * um, unix_file_t * f)
127 um->file_update (f, UNIX_FILE_UPDATE_DELETE);
128 close (f->file_descriptor);
129 f->file_descriptor = ~0;
130 pool_put (um->file_pool, f);
134 unix_file_set_data_available_to_write (u32 unix_file_index, uword is_available)
136 unix_file_t * uf = pool_elt_at_index (unix_main.file_pool, unix_file_index);
137 uword was_available = (uf->flags & UNIX_FILE_DATA_AVAILABLE_TO_WRITE);
138 if ((was_available != 0) != (is_available != 0))
140 uf->flags ^= UNIX_FILE_DATA_AVAILABLE_TO_WRITE;
141 unix_main.file_update (uf, UNIX_FILE_UPDATE_MODIFY);
143 return was_available != 0;
147 unix_save_error (unix_main_t * um, clib_error_t * error)
149 unix_error_history_t * eh = um->error_history + um->error_history_index;
150 clib_error_free_vector (eh->error);
152 eh->time = vlib_time_now (um->vlib_main);
153 um->n_total_errors += 1;
154 if (++um->error_history_index >= ARRAY_LEN (um->error_history))
155 um->error_history_index = 0;
158 /* Main function for Unix VLIB. */
159 int vlib_unix_main (int argc, char * argv[]);
161 /* Call to allocate/initialize physical DMA memory subsystem.
162 This is not an init function so that users can explicitly enable/disable
163 physmem when its not needed. */
164 clib_error_t * unix_physmem_init (vlib_main_t * vm,
165 int fail_if_physical_memory_not_present);
167 /* Set prompt for CLI. */
168 void vlib_unix_cli_set_prompt (char * prompt);
170 static inline unix_main_t * vlib_unix_get_main (void)
175 /* thread stack array; vec_len = max number of threads */
176 u8 **vlib_thread_stacks;
181 write_sys_fs (char * file_name, char * fmt, ...);
184 read_sys_fs (char * file_name, char * fmt, ...);
187 foreach_directory_file (char * dir_name,
188 clib_error_t * (* f) (void * arg, u8 * path_name,
190 void * arg, int scan_dirs);
192 #endif /* included_unix_unix_h */