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1 | /* |
1 | /* |
2 | * Copyright (c) 2005 Jakub Jermar |
2 | * Copyright (c) 2005 Jakub Jermar |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup genericconsole |
29 | /** @addtogroup genericconsole |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | 32 | ||
33 | /** |
33 | /** |
34 | * @file kconsole.c |
34 | * @file kconsole.c |
35 | * @brief Kernel console. |
35 | * @brief Kernel console. |
36 | * |
36 | * |
37 | * This file contains kernel thread managing the kernel console. |
37 | * This file contains kernel thread managing the kernel console. |
38 | */ |
38 | */ |
39 | 39 | ||
40 | #include <console/kconsole.h> |
40 | #include <console/kconsole.h> |
41 | #include <console/console.h> |
41 | #include <console/console.h> |
42 | #include <console/chardev.h> |
42 | #include <console/chardev.h> |
43 | #include <console/cmd.h> |
43 | #include <console/cmd.h> |
44 | #include <print.h> |
44 | #include <print.h> |
45 | #include <panic.h> |
45 | #include <panic.h> |
46 | #include <arch/types.h> |
46 | #include <arch/types.h> |
47 | #include <adt/list.h> |
47 | #include <adt/list.h> |
48 | #include <arch.h> |
48 | #include <arch.h> |
49 | #include <macros.h> |
49 | #include <macros.h> |
50 | #include <debug.h> |
50 | #include <debug.h> |
51 | #include <func.h> |
51 | #include <func.h> |
52 | #include <string.h> |
52 | #include <string.h> |
53 | #include <macros.h> |
53 | #include <macros.h> |
54 | #include <sysinfo/sysinfo.h> |
54 | #include <sysinfo/sysinfo.h> |
55 | #include <ddi/device.h> |
55 | #include <ddi/device.h> |
56 | #include <symtab.h> |
56 | #include <symtab.h> |
57 | #include <errno.h> |
57 | #include <errno.h> |
58 | 58 | ||
59 | /** Simple kernel console. |
59 | /** Simple kernel console. |
60 | * |
60 | * |
61 | * The console is realized by kernel thread kconsole. |
61 | * The console is realized by kernel thread kconsole. |
62 | * It doesn't understand any useful command on its own, |
62 | * It doesn't understand any useful command on its own, |
63 | * but makes it possible for other kernel subsystems to |
63 | * but makes it possible for other kernel subsystems to |
64 | * register their own commands. |
64 | * register their own commands. |
65 | */ |
65 | */ |
66 | 66 | ||
67 | /** Locking. |
67 | /** Locking. |
68 | * |
68 | * |
69 | * There is a list of cmd_info_t structures. This list |
69 | * There is a list of cmd_info_t structures. This list |
70 | * is protected by cmd_lock spinlock. Note that specially |
70 | * is protected by cmd_lock spinlock. Note that specially |
71 | * the link elements of cmd_info_t are protected by |
71 | * the link elements of cmd_info_t are protected by |
72 | * this lock. |
72 | * this lock. |
73 | * |
73 | * |
74 | * Each cmd_info_t also has its own lock, which protects |
74 | * Each cmd_info_t also has its own lock, which protects |
75 | * all elements thereof except the link element. |
75 | * all elements thereof except the link element. |
76 | * |
76 | * |
77 | * cmd_lock must be acquired before any cmd_info lock. |
77 | * cmd_lock must be acquired before any cmd_info lock. |
78 | * When locking two cmd info structures, structure with |
78 | * When locking two cmd info structures, structure with |
79 | * lower address must be locked first. |
79 | * lower address must be locked first. |
80 | */ |
80 | */ |
81 | 81 | ||
82 | SPINLOCK_INITIALIZE(cmd_lock); /**< Lock protecting command list. */ |
82 | SPINLOCK_INITIALIZE(cmd_lock); /**< Lock protecting command list. */ |
83 | LIST_INITIALIZE(cmd_head); /**< Command list. */ |
83 | LIST_INITIALIZE(cmd_head); /**< Command list. */ |
84 | 84 | ||
85 | static cmd_info_t *parse_cmdline(char *cmdline, size_t len); |
85 | static cmd_info_t *parse_cmdline(char *cmdline, size_t len); |
86 | static bool parse_argument(char *cmdline, size_t len, index_t *start, |
86 | static bool parse_argument(char *cmdline, size_t len, index_t *start, |
87 | index_t *end); |
87 | index_t *end); |
88 | static char history[KCONSOLE_HISTORY][MAX_CMDLINE] = {}; |
88 | static char history[KCONSOLE_HISTORY][MAX_CMDLINE] = {}; |
89 | 89 | ||
90 | /* |
90 | /* |
91 | * For now, we use 0 as INR. |
91 | * For now, we use 0 as INR. |
92 | * However, it is therefore desirable to have architecture specific |
92 | * However, it is therefore desirable to have architecture specific |
93 | * definition of KCONSOLE_VIRT_INR in the future. |
93 | * definition of KCONSOLE_VIRT_INR in the future. |
94 | */ |
94 | */ |
95 | #define KCONSOLE_VIRT_INR 0 |
95 | #define KCONSOLE_VIRT_INR 0 |
96 | 96 | ||
97 | bool kconsole_notify = false; |
97 | bool kconsole_notify = false; |
98 | irq_t kconsole_irq; |
98 | irq_t kconsole_irq; |
99 | 99 | ||
100 | 100 | ||
101 | /** Allways refuse IRQ ownership. |
101 | /** Allways refuse IRQ ownership. |
102 | * |
102 | * |
103 | * This is not a real IRQ, so we always decline. |
103 | * This is not a real IRQ, so we always decline. |
104 | * |
104 | * |
105 | * @return Always returns IRQ_DECLINE. |
105 | * @return Always returns IRQ_DECLINE. |
106 | * |
106 | * |
107 | */ |
107 | */ |
108 | static irq_ownership_t kconsole_claim(irq_t *irq) |
108 | static irq_ownership_t kconsole_claim(irq_t *irq) |
109 | { |
109 | { |
110 | return IRQ_DECLINE; |
110 | return IRQ_DECLINE; |
111 | } |
111 | } |
112 | 112 | ||
113 | 113 | ||
114 | /** Initialize kconsole data structures |
114 | /** Initialize kconsole data structures |
115 | * |
115 | * |
116 | * This is the most basic initialization, almost no |
116 | * This is the most basic initialization, almost no |
117 | * other kernel subsystem is ready yet. |
117 | * other kernel subsystem is ready yet. |
118 | * |
118 | * |
119 | */ |
119 | */ |
120 | void kconsole_init(void) |
120 | void kconsole_init(void) |
121 | { |
121 | { |
122 | unsigned int i; |
122 | unsigned int i; |
123 | 123 | ||
124 | cmd_init(); |
124 | cmd_init(); |
125 | for (i = 0; i < KCONSOLE_HISTORY; i++) |
125 | for (i = 0; i < KCONSOLE_HISTORY; i++) |
126 | history[i][0] = '\0'; |
126 | history[i][0] = '\0'; |
127 | } |
127 | } |
128 | 128 | ||
129 | 129 | ||
130 | /** Initialize kconsole notification mechanism |
130 | /** Initialize kconsole notification mechanism |
131 | * |
131 | * |
132 | * Initialize the virtual IRQ notification mechanism. |
132 | * Initialize the virtual IRQ notification mechanism. |
133 | * |
133 | * |
134 | */ |
134 | */ |
135 | void kconsole_notify_init(void) |
135 | void kconsole_notify_init(void) |
136 | { |
136 | { |
137 | devno_t devno = device_assign_devno(); |
- | |
138 | - | ||
139 | sysinfo_set_item_val("kconsole.present", NULL, true); |
137 | sysinfo_set_item_val("kconsole.present", NULL, true); |
140 | sysinfo_set_item_val("kconsole.devno", NULL, devno); |
- | |
141 | sysinfo_set_item_val("kconsole.inr", NULL, KCONSOLE_VIRT_INR); |
138 | sysinfo_set_item_val("kconsole.inr", NULL, KCONSOLE_VIRT_INR); |
142 | 139 | ||
143 | irq_initialize(&kconsole_irq); |
140 | irq_initialize(&kconsole_irq); |
144 | kconsole_irq.devno = devno; |
141 | kconsole_irq.devno = device_assign_devno(); |
145 | kconsole_irq.inr = KCONSOLE_VIRT_INR; |
142 | kconsole_irq.inr = KCONSOLE_VIRT_INR; |
146 | kconsole_irq.claim = kconsole_claim; |
143 | kconsole_irq.claim = kconsole_claim; |
147 | irq_register(&kconsole_irq); |
144 | irq_register(&kconsole_irq); |
148 | 145 | ||
149 | kconsole_notify = true; |
146 | kconsole_notify = true; |
150 | } |
147 | } |
151 | 148 | ||
152 | 149 | ||
153 | /** Register kconsole command. |
150 | /** Register kconsole command. |
154 | * |
151 | * |
155 | * @param cmd Structure describing the command. |
152 | * @param cmd Structure describing the command. |
156 | * |
153 | * |
157 | * @return 0 on failure, 1 on success. |
154 | * @return 0 on failure, 1 on success. |
158 | */ |
155 | */ |
159 | int cmd_register(cmd_info_t *cmd) |
156 | int cmd_register(cmd_info_t *cmd) |
160 | { |
157 | { |
161 | link_t *cur; |
158 | link_t *cur; |
162 | 159 | ||
163 | spinlock_lock(&cmd_lock); |
160 | spinlock_lock(&cmd_lock); |
164 | 161 | ||
165 | /* |
162 | /* |
166 | * Make sure the command is not already listed. |
163 | * Make sure the command is not already listed. |
167 | */ |
164 | */ |
168 | for (cur = cmd_head.next; cur != &cmd_head; cur = cur->next) { |
165 | for (cur = cmd_head.next; cur != &cmd_head; cur = cur->next) { |
169 | cmd_info_t *hlp; |
166 | cmd_info_t *hlp; |
170 | 167 | ||
171 | hlp = list_get_instance(cur, cmd_info_t, link); |
168 | hlp = list_get_instance(cur, cmd_info_t, link); |
172 | 169 | ||
173 | if (hlp == cmd) { |
170 | if (hlp == cmd) { |
174 | /* The command is already there. */ |
171 | /* The command is already there. */ |
175 | spinlock_unlock(&cmd_lock); |
172 | spinlock_unlock(&cmd_lock); |
176 | return 0; |
173 | return 0; |
177 | } |
174 | } |
178 | 175 | ||
179 | /* Avoid deadlock. */ |
176 | /* Avoid deadlock. */ |
180 | if (hlp < cmd) { |
177 | if (hlp < cmd) { |
181 | spinlock_lock(&hlp->lock); |
178 | spinlock_lock(&hlp->lock); |
182 | spinlock_lock(&cmd->lock); |
179 | spinlock_lock(&cmd->lock); |
183 | } else { |
180 | } else { |
184 | spinlock_lock(&cmd->lock); |
181 | spinlock_lock(&cmd->lock); |
185 | spinlock_lock(&hlp->lock); |
182 | spinlock_lock(&hlp->lock); |
186 | } |
183 | } |
187 | if ((strncmp(hlp->name, cmd->name, max(strlen(cmd->name), |
184 | if ((strncmp(hlp->name, cmd->name, max(strlen(cmd->name), |
188 | strlen(hlp->name))) == 0)) { |
185 | strlen(hlp->name))) == 0)) { |
189 | /* The command is already there. */ |
186 | /* The command is already there. */ |
190 | spinlock_unlock(&hlp->lock); |
187 | spinlock_unlock(&hlp->lock); |
191 | spinlock_unlock(&cmd->lock); |
188 | spinlock_unlock(&cmd->lock); |
192 | spinlock_unlock(&cmd_lock); |
189 | spinlock_unlock(&cmd_lock); |
193 | return 0; |
190 | return 0; |
194 | } |
191 | } |
195 | 192 | ||
196 | spinlock_unlock(&hlp->lock); |
193 | spinlock_unlock(&hlp->lock); |
197 | spinlock_unlock(&cmd->lock); |
194 | spinlock_unlock(&cmd->lock); |
198 | } |
195 | } |
199 | 196 | ||
200 | /* |
197 | /* |
201 | * Now the command can be added. |
198 | * Now the command can be added. |
202 | */ |
199 | */ |
203 | list_append(&cmd->link, &cmd_head); |
200 | list_append(&cmd->link, &cmd_head); |
204 | 201 | ||
205 | spinlock_unlock(&cmd_lock); |
202 | spinlock_unlock(&cmd_lock); |
206 | return 1; |
203 | return 1; |
207 | } |
204 | } |
208 | 205 | ||
209 | /** Print count times a character */ |
206 | /** Print count times a character */ |
210 | static void rdln_print_c(char ch, int count) |
207 | static void rdln_print_c(char ch, int count) |
211 | { |
208 | { |
212 | int i; |
209 | int i; |
213 | for (i = 0; i < count; i++) |
210 | for (i = 0; i < count; i++) |
214 | putchar(ch); |
211 | putchar(ch); |
215 | } |
212 | } |
216 | 213 | ||
217 | /** Insert character to string */ |
214 | /** Insert character to string */ |
218 | static void insert_char(char *str, char ch, int pos) |
215 | static void insert_char(char *str, char ch, int pos) |
219 | { |
216 | { |
220 | int i; |
217 | int i; |
221 | 218 | ||
222 | for (i = strlen(str); i > pos; i--) |
219 | for (i = strlen(str); i > pos; i--) |
223 | str[i] = str[i - 1]; |
220 | str[i] = str[i - 1]; |
224 | str[pos] = ch; |
221 | str[pos] = ch; |
225 | } |
222 | } |
226 | 223 | ||
227 | /** Try to find a command beginning with prefix */ |
224 | /** Try to find a command beginning with prefix */ |
228 | static const char *cmdtab_search_one(const char *name,link_t **startpos) |
225 | static const char *cmdtab_search_one(const char *name,link_t **startpos) |
229 | { |
226 | { |
230 | size_t namelen = strlen(name); |
227 | size_t namelen = strlen(name); |
231 | const char *curname; |
228 | const char *curname; |
232 | 229 | ||
233 | spinlock_lock(&cmd_lock); |
230 | spinlock_lock(&cmd_lock); |
234 | 231 | ||
235 | if (!*startpos) |
232 | if (!*startpos) |
236 | *startpos = cmd_head.next; |
233 | *startpos = cmd_head.next; |
237 | 234 | ||
238 | for (; *startpos != &cmd_head; *startpos = (*startpos)->next) { |
235 | for (; *startpos != &cmd_head; *startpos = (*startpos)->next) { |
239 | cmd_info_t *hlp; |
236 | cmd_info_t *hlp; |
240 | hlp = list_get_instance(*startpos, cmd_info_t, link); |
237 | hlp = list_get_instance(*startpos, cmd_info_t, link); |
241 | 238 | ||
242 | curname = hlp->name; |
239 | curname = hlp->name; |
243 | if (strlen(curname) < namelen) |
240 | if (strlen(curname) < namelen) |
244 | continue; |
241 | continue; |
245 | if (strncmp(curname, name, namelen) == 0) { |
242 | if (strncmp(curname, name, namelen) == 0) { |
246 | spinlock_unlock(&cmd_lock); |
243 | spinlock_unlock(&cmd_lock); |
247 | return curname+namelen; |
244 | return curname+namelen; |
248 | } |
245 | } |
249 | } |
246 | } |
250 | spinlock_unlock(&cmd_lock); |
247 | spinlock_unlock(&cmd_lock); |
251 | return NULL; |
248 | return NULL; |
252 | } |
249 | } |
253 | 250 | ||
254 | 251 | ||
255 | /** Command completion of the commands |
252 | /** Command completion of the commands |
256 | * |
253 | * |
257 | * @param name - string to match, changed to hint on exit |
254 | * @param name - string to match, changed to hint on exit |
258 | * @return number of found matches |
255 | * @return number of found matches |
259 | */ |
256 | */ |
260 | static int cmdtab_compl(char *name) |
257 | static int cmdtab_compl(char *name) |
261 | { |
258 | { |
262 | static char output[/*MAX_SYMBOL_NAME*/128 + 1]; |
259 | static char output[/*MAX_SYMBOL_NAME*/128 + 1]; |
263 | link_t *startpos = NULL; |
260 | link_t *startpos = NULL; |
264 | const char *foundtxt; |
261 | const char *foundtxt; |
265 | int found = 0; |
262 | int found = 0; |
266 | int i; |
263 | int i; |
267 | 264 | ||
268 | output[0] = '\0'; |
265 | output[0] = '\0'; |
269 | while ((foundtxt = cmdtab_search_one(name, &startpos))) { |
266 | while ((foundtxt = cmdtab_search_one(name, &startpos))) { |
270 | startpos = startpos->next; |
267 | startpos = startpos->next; |
271 | if (!found) |
268 | if (!found) |
272 | strncpy(output, foundtxt, strlen(foundtxt) + 1); |
269 | strncpy(output, foundtxt, strlen(foundtxt) + 1); |
273 | else { |
270 | else { |
274 | for (i = 0; output[i] && foundtxt[i] && |
271 | for (i = 0; output[i] && foundtxt[i] && |
275 | output[i] == foundtxt[i]; i++) |
272 | output[i] == foundtxt[i]; i++) |
276 | ; |
273 | ; |
277 | output[i] = '\0'; |
274 | output[i] = '\0'; |
278 | } |
275 | } |
279 | found++; |
276 | found++; |
280 | } |
277 | } |
281 | if (!found) |
278 | if (!found) |
282 | return 0; |
279 | return 0; |
283 | 280 | ||
284 | if (found > 1 && !strlen(output)) { |
281 | if (found > 1 && !strlen(output)) { |
285 | printf("\n"); |
282 | printf("\n"); |
286 | startpos = NULL; |
283 | startpos = NULL; |
287 | while ((foundtxt = cmdtab_search_one(name, &startpos))) { |
284 | while ((foundtxt = cmdtab_search_one(name, &startpos))) { |
288 | cmd_info_t *hlp; |
285 | cmd_info_t *hlp; |
289 | hlp = list_get_instance(startpos, cmd_info_t, link); |
286 | hlp = list_get_instance(startpos, cmd_info_t, link); |
290 | printf("%s - %s\n", hlp->name, hlp->description); |
287 | printf("%s - %s\n", hlp->name, hlp->description); |
291 | startpos = startpos->next; |
288 | startpos = startpos->next; |
292 | } |
289 | } |
293 | } |
290 | } |
294 | strncpy(name, output, 128/*MAX_SYMBOL_NAME*/); |
291 | strncpy(name, output, 128/*MAX_SYMBOL_NAME*/); |
295 | return found; |
292 | return found; |
296 | } |
293 | } |
297 | 294 | ||
298 | static char *clever_readline(const char *prompt, indev_t *input) |
295 | static char *clever_readline(const char *prompt, indev_t *input) |
299 | { |
296 | { |
300 | static int histposition = 0; |
297 | static int histposition = 0; |
301 | 298 | ||
302 | static char tmp[MAX_CMDLINE + 1]; |
299 | static char tmp[MAX_CMDLINE + 1]; |
303 | int curlen = 0, position = 0; |
300 | int curlen = 0, position = 0; |
304 | char *current = history[histposition]; |
301 | char *current = history[histposition]; |
305 | int i; |
302 | int i; |
306 | char mod; /* Command Modifier */ |
303 | char mod; /* Command Modifier */ |
307 | char c; |
304 | char c; |
308 | 305 | ||
309 | printf("%s> ", prompt); |
306 | printf("%s> ", prompt); |
310 | while (1) { |
307 | while (1) { |
311 | c = _getc(input); |
308 | c = _getc(input); |
312 | if (c == '\n') { |
309 | if (c == '\n') { |
313 | putchar(c); |
310 | putchar(c); |
314 | break; |
311 | break; |
315 | } |
312 | } |
316 | if (c == '\b') { /* Backspace */ |
313 | if (c == '\b') { /* Backspace */ |
317 | if (position == 0) |
314 | if (position == 0) |
318 | continue; |
315 | continue; |
319 | for (i = position; i < curlen; i++) |
316 | for (i = position; i < curlen; i++) |
320 | current[i - 1] = current[i]; |
317 | current[i - 1] = current[i]; |
321 | curlen--; |
318 | curlen--; |
322 | position--; |
319 | position--; |
323 | putchar('\b'); |
320 | putchar('\b'); |
324 | for (i = position; i < curlen; i++) |
321 | for (i = position; i < curlen; i++) |
325 | putchar(current[i]); |
322 | putchar(current[i]); |
326 | putchar(' '); |
323 | putchar(' '); |
327 | rdln_print_c('\b', curlen - position + 1); |
324 | rdln_print_c('\b', curlen - position + 1); |
328 | continue; |
325 | continue; |
329 | } |
326 | } |
330 | if (c == '\t') { /* Tabulator */ |
327 | if (c == '\t') { /* Tabulator */ |
331 | int found; |
328 | int found; |
332 | 329 | ||
333 | /* Move to the end of the word */ |
330 | /* Move to the end of the word */ |
334 | for (; position < curlen && current[position] != ' '; |
331 | for (; position < curlen && current[position] != ' '; |
335 | position++) |
332 | position++) |
336 | putchar(current[position]); |
333 | putchar(current[position]); |
337 | /* Copy to tmp last word */ |
334 | /* Copy to tmp last word */ |
338 | for (i = position - 1; i >= 0 && current[i] != ' '; i--) |
335 | for (i = position - 1; i >= 0 && current[i] != ' '; i--) |
339 | ; |
336 | ; |
340 | /* If word begins with * or &, skip it */ |
337 | /* If word begins with * or &, skip it */ |
341 | if (tmp[0] == '*' || tmp[0] == '&') |
338 | if (tmp[0] == '*' || tmp[0] == '&') |
342 | for (i = 1; tmp[i]; i++) |
339 | for (i = 1; tmp[i]; i++) |
343 | tmp[i - 1] = tmp[i]; |
340 | tmp[i - 1] = tmp[i]; |
344 | i++; /* I is at the start of the word */ |
341 | i++; /* I is at the start of the word */ |
345 | strncpy(tmp, current + i, position - i + 1); |
342 | strncpy(tmp, current + i, position - i + 1); |
346 | 343 | ||
347 | if (i == 0) { /* Command completion */ |
344 | if (i == 0) { /* Command completion */ |
348 | found = cmdtab_compl(tmp); |
345 | found = cmdtab_compl(tmp); |
349 | } else { /* Symtab completion */ |
346 | } else { /* Symtab completion */ |
350 | found = symtab_compl(tmp); |
347 | found = symtab_compl(tmp); |
351 | } |
348 | } |
352 | 349 | ||
353 | if (found == 0) |
350 | if (found == 0) |
354 | continue; |
351 | continue; |
355 | for (i = 0; tmp[i] && curlen < MAX_CMDLINE; |
352 | for (i = 0; tmp[i] && curlen < MAX_CMDLINE; |
356 | i++, curlen++) |
353 | i++, curlen++) |
357 | insert_char(current, tmp[i], i + position); |
354 | insert_char(current, tmp[i], i + position); |
358 | 355 | ||
359 | if (strlen(tmp) || found == 1) { /* If we have a hint */ |
356 | if (strlen(tmp) || found == 1) { /* If we have a hint */ |
360 | for (i = position; i < curlen; i++) |
357 | for (i = position; i < curlen; i++) |
361 | putchar(current[i]); |
358 | putchar(current[i]); |
362 | position += strlen(tmp); |
359 | position += strlen(tmp); |
363 | /* Add space to end */ |
360 | /* Add space to end */ |
364 | if (found == 1 && position == curlen && |
361 | if (found == 1 && position == curlen && |
365 | curlen < MAX_CMDLINE) { |
362 | curlen < MAX_CMDLINE) { |
366 | current[position] = ' '; |
363 | current[position] = ' '; |
367 | curlen++; |
364 | curlen++; |
368 | position++; |
365 | position++; |
369 | putchar(' '); |
366 | putchar(' '); |
370 | } |
367 | } |
371 | } else { /* No hint, table was printed */ |
368 | } else { /* No hint, table was printed */ |
372 | printf("%s> ", prompt); |
369 | printf("%s> ", prompt); |
373 | for (i = 0; i < curlen; i++) |
370 | for (i = 0; i < curlen; i++) |
374 | putchar(current[i]); |
371 | putchar(current[i]); |
375 | position += strlen(tmp); |
372 | position += strlen(tmp); |
376 | } |
373 | } |
377 | rdln_print_c('\b', curlen - position); |
374 | rdln_print_c('\b', curlen - position); |
378 | continue; |
375 | continue; |
379 | } |
376 | } |
380 | if (c == 0x1b) { /* Special command */ |
377 | if (c == 0x1b) { /* Special command */ |
381 | mod = _getc(input); |
378 | mod = _getc(input); |
382 | c = _getc(input); |
379 | c = _getc(input); |
383 | 380 | ||
384 | if (mod != 0x5b && mod != 0x4f) |
381 | if (mod != 0x5b && mod != 0x4f) |
385 | continue; |
382 | continue; |
386 | 383 | ||
387 | if (c == 0x33 && _getc(input) == 0x7e) { |
384 | if (c == 0x33 && _getc(input) == 0x7e) { |
388 | /* Delete */ |
385 | /* Delete */ |
389 | if (position == curlen) |
386 | if (position == curlen) |
390 | continue; |
387 | continue; |
391 | for (i = position + 1; i < curlen; i++) { |
388 | for (i = position + 1; i < curlen; i++) { |
392 | putchar(current[i]); |
389 | putchar(current[i]); |
393 | current[i - 1] = current[i]; |
390 | current[i - 1] = current[i]; |
394 | } |
391 | } |
395 | putchar(' '); |
392 | putchar(' '); |
396 | rdln_print_c('\b', curlen - position); |
393 | rdln_print_c('\b', curlen - position); |
397 | curlen--; |
394 | curlen--; |
398 | } else if (c == 0x48) { /* Home */ |
395 | } else if (c == 0x48) { /* Home */ |
399 | rdln_print_c('\b', position); |
396 | rdln_print_c('\b', position); |
400 | position = 0; |
397 | position = 0; |
401 | } else if (c == 0x46) { /* End */ |
398 | } else if (c == 0x46) { /* End */ |
402 | for (i = position; i < curlen; i++) |
399 | for (i = position; i < curlen; i++) |
403 | putchar(current[i]); |
400 | putchar(current[i]); |
404 | position = curlen; |
401 | position = curlen; |
405 | } else if (c == 0x44) { /* Left */ |
402 | } else if (c == 0x44) { /* Left */ |
406 | if (position > 0) { |
403 | if (position > 0) { |
407 | putchar('\b'); |
404 | putchar('\b'); |
408 | position--; |
405 | position--; |
409 | } |
406 | } |
410 | continue; |
407 | continue; |
411 | } else if (c == 0x43) { /* Right */ |
408 | } else if (c == 0x43) { /* Right */ |
412 | if (position < curlen) { |
409 | if (position < curlen) { |
413 | putchar(current[position]); |
410 | putchar(current[position]); |
414 | position++; |
411 | position++; |
415 | } |
412 | } |
416 | continue; |
413 | continue; |
417 | } else if (c == 0x41 || c == 0x42) { |
414 | } else if (c == 0x41 || c == 0x42) { |
418 | /* Up, down */ |
415 | /* Up, down */ |
419 | rdln_print_c('\b', position); |
416 | rdln_print_c('\b', position); |
420 | rdln_print_c(' ', curlen); |
417 | rdln_print_c(' ', curlen); |
421 | rdln_print_c('\b', curlen); |
418 | rdln_print_c('\b', curlen); |
422 | if (c == 0x41) /* Up */ |
419 | if (c == 0x41) /* Up */ |
423 | histposition--; |
420 | histposition--; |
424 | else |
421 | else |
425 | histposition++; |
422 | histposition++; |
426 | if (histposition < 0) { |
423 | if (histposition < 0) { |
427 | histposition = KCONSOLE_HISTORY - 1; |
424 | histposition = KCONSOLE_HISTORY - 1; |
428 | } else { |
425 | } else { |
429 | histposition = |
426 | histposition = |
430 | histposition % KCONSOLE_HISTORY; |
427 | histposition % KCONSOLE_HISTORY; |
431 | } |
428 | } |
432 | current = history[histposition]; |
429 | current = history[histposition]; |
433 | printf("%s", current); |
430 | printf("%s", current); |
434 | curlen = strlen(current); |
431 | curlen = strlen(current); |
435 | position = curlen; |
432 | position = curlen; |
436 | continue; |
433 | continue; |
437 | } |
434 | } |
438 | continue; |
435 | continue; |
439 | } |
436 | } |
440 | if (curlen >= MAX_CMDLINE) |
437 | if (curlen >= MAX_CMDLINE) |
441 | continue; |
438 | continue; |
442 | 439 | ||
443 | insert_char(current, c, position); |
440 | insert_char(current, c, position); |
444 | 441 | ||
445 | curlen++; |
442 | curlen++; |
446 | for (i = position; i < curlen; i++) |
443 | for (i = position; i < curlen; i++) |
447 | putchar(current[i]); |
444 | putchar(current[i]); |
448 | position++; |
445 | position++; |
449 | rdln_print_c('\b',curlen - position); |
446 | rdln_print_c('\b',curlen - position); |
450 | } |
447 | } |
451 | if (curlen) { |
448 | if (curlen) { |
452 | histposition++; |
449 | histposition++; |
453 | histposition = histposition % KCONSOLE_HISTORY; |
450 | histposition = histposition % KCONSOLE_HISTORY; |
454 | } |
451 | } |
455 | current[curlen] = '\0'; |
452 | current[curlen] = '\0'; |
456 | return current; |
453 | return current; |
457 | } |
454 | } |
458 | 455 | ||
459 | bool kconsole_check_poll(void) |
456 | bool kconsole_check_poll(void) |
460 | { |
457 | { |
461 | return check_poll(stdin); |
458 | return check_poll(stdin); |
462 | } |
459 | } |
463 | 460 | ||
464 | /** Kernel console prompt. |
461 | /** Kernel console prompt. |
465 | * |
462 | * |
466 | * @param prompt Kernel console prompt (e.g kconsole/panic). |
463 | * @param prompt Kernel console prompt (e.g kconsole/panic). |
467 | * @param msg Message to display in the beginning. |
464 | * @param msg Message to display in the beginning. |
468 | * @param kcon Wait for keypress to show the prompt |
465 | * @param kcon Wait for keypress to show the prompt |
469 | * and never exit. |
466 | * and never exit. |
470 | * |
467 | * |
471 | */ |
468 | */ |
472 | void kconsole(char *prompt, char *msg, bool kcon) |
469 | void kconsole(char *prompt, char *msg, bool kcon) |
473 | { |
470 | { |
474 | cmd_info_t *cmd_info; |
471 | cmd_info_t *cmd_info; |
475 | count_t len; |
472 | count_t len; |
476 | char *cmdline; |
473 | char *cmdline; |
477 | 474 | ||
478 | if (!stdin) { |
475 | if (!stdin) { |
479 | LOG("No stdin for kernel console"); |
476 | LOG("No stdin for kernel console"); |
480 | return; |
477 | return; |
481 | } |
478 | } |
482 | 479 | ||
483 | if (msg) |
480 | if (msg) |
484 | printf("%s", msg); |
481 | printf("%s", msg); |
485 | 482 | ||
486 | if (kcon) |
483 | if (kcon) |
487 | _getc(stdin); |
484 | _getc(stdin); |
488 | else |
485 | else |
489 | printf("Type \"exit\" to leave the console.\n"); |
486 | printf("Type \"exit\" to leave the console.\n"); |
490 | 487 | ||
491 | while (true) { |
488 | while (true) { |
492 | cmdline = clever_readline((char *) prompt, stdin); |
489 | cmdline = clever_readline((char *) prompt, stdin); |
493 | len = strlen(cmdline); |
490 | len = strlen(cmdline); |
494 | if (!len) |
491 | if (!len) |
495 | continue; |
492 | continue; |
496 | 493 | ||
497 | if ((!kcon) && (len == 4) && (strncmp(cmdline, "exit", 4) == 0)) |
494 | if ((!kcon) && (len == 4) && (strncmp(cmdline, "exit", 4) == 0)) |
498 | break; |
495 | break; |
499 | 496 | ||
500 | cmd_info = parse_cmdline(cmdline, len); |
497 | cmd_info = parse_cmdline(cmdline, len); |
501 | if (!cmd_info) |
498 | if (!cmd_info) |
502 | continue; |
499 | continue; |
503 | 500 | ||
504 | (void) cmd_info->func(cmd_info->argv); |
501 | (void) cmd_info->func(cmd_info->argv); |
505 | } |
502 | } |
506 | } |
503 | } |
507 | 504 | ||
508 | /** Kernel console managing thread. |
505 | /** Kernel console managing thread. |
509 | * |
506 | * |
510 | */ |
507 | */ |
511 | void kconsole_thread(void *data) |
508 | void kconsole_thread(void *data) |
512 | { |
509 | { |
513 | kconsole("kconsole", "Kernel console ready (press any key to activate)\n", true); |
510 | kconsole("kconsole", "Kernel console ready (press any key to activate)\n", true); |
514 | } |
511 | } |
515 | 512 | ||
516 | static int parse_int_arg(char *text, size_t len, unative_t *result) |
513 | static int parse_int_arg(char *text, size_t len, unative_t *result) |
517 | { |
514 | { |
518 | uintptr_t symaddr; |
515 | uintptr_t symaddr; |
519 | bool isaddr = false; |
516 | bool isaddr = false; |
520 | bool isptr = false; |
517 | bool isptr = false; |
521 | int rc; |
518 | int rc; |
522 | 519 | ||
523 | static char symname[MAX_SYMBOL_NAME]; |
520 | static char symname[MAX_SYMBOL_NAME]; |
524 | 521 | ||
525 | /* If we get a name, try to find it in symbol table */ |
522 | /* If we get a name, try to find it in symbol table */ |
526 | if (text[0] == '&') { |
523 | if (text[0] == '&') { |
527 | isaddr = true; |
524 | isaddr = true; |
528 | text++; |
525 | text++; |
529 | len--; |
526 | len--; |
530 | } else if (text[0] == '*') { |
527 | } else if (text[0] == '*') { |
531 | isptr = true; |
528 | isptr = true; |
532 | text++; |
529 | text++; |
533 | len--; |
530 | len--; |
534 | } |
531 | } |
535 | if (text[0] < '0' || text[0] > '9') { |
532 | if (text[0] < '0' || text[0] > '9') { |
536 | strncpy(symname, text, min(len + 1, MAX_SYMBOL_NAME)); |
533 | strncpy(symname, text, min(len + 1, MAX_SYMBOL_NAME)); |
537 | rc = symtab_addr_lookup(symname, &symaddr); |
534 | rc = symtab_addr_lookup(symname, &symaddr); |
538 | switch (rc) { |
535 | switch (rc) { |
539 | case ENOENT: |
536 | case ENOENT: |
540 | printf("Symbol %s not found.\n", symname); |
537 | printf("Symbol %s not found.\n", symname); |
541 | return -1; |
538 | return -1; |
542 | case EOVERFLOW: |
539 | case EOVERFLOW: |
543 | printf("Duplicate symbol %s.\n", symname); |
540 | printf("Duplicate symbol %s.\n", symname); |
544 | symtab_print_search(symname); |
541 | symtab_print_search(symname); |
545 | return -1; |
542 | return -1; |
546 | default: |
543 | default: |
547 | printf("No symbol information available.\n"); |
544 | printf("No symbol information available.\n"); |
548 | return -1; |
545 | return -1; |
549 | } |
546 | } |
550 | 547 | ||
551 | if (isaddr) |
548 | if (isaddr) |
552 | *result = (unative_t)symaddr; |
549 | *result = (unative_t)symaddr; |
553 | else if (isptr) |
550 | else if (isptr) |
554 | *result = **((unative_t **)symaddr); |
551 | *result = **((unative_t **)symaddr); |
555 | else |
552 | else |
556 | *result = *((unative_t *)symaddr); |
553 | *result = *((unative_t *)symaddr); |
557 | } else { /* It's a number - convert it */ |
554 | } else { /* It's a number - convert it */ |
558 | *result = atoi(text); |
555 | *result = atoi(text); |
559 | if (isptr) |
556 | if (isptr) |
560 | *result = *((unative_t *)*result); |
557 | *result = *((unative_t *)*result); |
561 | } |
558 | } |
562 | 559 | ||
563 | return 0; |
560 | return 0; |
564 | } |
561 | } |
565 | 562 | ||
566 | /** Parse command line. |
563 | /** Parse command line. |
567 | * |
564 | * |
568 | * @param cmdline Command line as read from input device. |
565 | * @param cmdline Command line as read from input device. |
569 | * @param len Command line length. |
566 | * @param len Command line length. |
570 | * |
567 | * |
571 | * @return Structure describing the command. |
568 | * @return Structure describing the command. |
572 | */ |
569 | */ |
573 | cmd_info_t *parse_cmdline(char *cmdline, size_t len) |
570 | cmd_info_t *parse_cmdline(char *cmdline, size_t len) |
574 | { |
571 | { |
575 | index_t start = 0, end = 0; |
572 | index_t start = 0, end = 0; |
576 | cmd_info_t *cmd = NULL; |
573 | cmd_info_t *cmd = NULL; |
577 | link_t *cur; |
574 | link_t *cur; |
578 | count_t i; |
575 | count_t i; |
579 | int error = 0; |
576 | int error = 0; |
580 | 577 | ||
581 | if (!parse_argument(cmdline, len, &start, &end)) { |
578 | if (!parse_argument(cmdline, len, &start, &end)) { |
582 | /* Command line did not contain alphanumeric word. */ |
579 | /* Command line did not contain alphanumeric word. */ |
583 | return NULL; |
580 | return NULL; |
584 | } |
581 | } |
585 | 582 | ||
586 | spinlock_lock(&cmd_lock); |
583 | spinlock_lock(&cmd_lock); |
587 | 584 | ||
588 | for (cur = cmd_head.next; cur != &cmd_head; cur = cur->next) { |
585 | for (cur = cmd_head.next; cur != &cmd_head; cur = cur->next) { |
589 | cmd_info_t *hlp; |
586 | cmd_info_t *hlp; |
590 | 587 | ||
591 | hlp = list_get_instance(cur, cmd_info_t, link); |
588 | hlp = list_get_instance(cur, cmd_info_t, link); |
592 | spinlock_lock(&hlp->lock); |
589 | spinlock_lock(&hlp->lock); |
593 | 590 | ||
594 | if (strncmp(hlp->name, &cmdline[start], max(strlen(hlp->name), |
591 | if (strncmp(hlp->name, &cmdline[start], max(strlen(hlp->name), |
595 | end - start + 1)) == 0) { |
592 | end - start + 1)) == 0) { |
596 | cmd = hlp; |
593 | cmd = hlp; |
597 | break; |
594 | break; |
598 | } |
595 | } |
599 | 596 | ||
600 | spinlock_unlock(&hlp->lock); |
597 | spinlock_unlock(&hlp->lock); |
601 | } |
598 | } |
602 | 599 | ||
603 | spinlock_unlock(&cmd_lock); |
600 | spinlock_unlock(&cmd_lock); |
604 | 601 | ||
605 | if (!cmd) { |
602 | if (!cmd) { |
606 | /* Unknown command. */ |
603 | /* Unknown command. */ |
607 | printf("Unknown command.\n"); |
604 | printf("Unknown command.\n"); |
608 | return NULL; |
605 | return NULL; |
609 | } |
606 | } |
610 | 607 | ||
611 | /* cmd == hlp is locked */ |
608 | /* cmd == hlp is locked */ |
612 | 609 | ||
613 | /* |
610 | /* |
614 | * The command line must be further analyzed and |
611 | * The command line must be further analyzed and |
615 | * the parameters therefrom must be matched and |
612 | * the parameters therefrom must be matched and |
616 | * converted to those specified in the cmd info |
613 | * converted to those specified in the cmd info |
617 | * structure. |
614 | * structure. |
618 | */ |
615 | */ |
619 | 616 | ||
620 | for (i = 0; i < cmd->argc; i++) { |
617 | for (i = 0; i < cmd->argc; i++) { |
621 | char *buf; |
618 | char *buf; |
622 | start = end + 1; |
619 | start = end + 1; |
623 | if (!parse_argument(cmdline, len, &start, &end)) { |
620 | if (!parse_argument(cmdline, len, &start, &end)) { |
624 | printf("Too few arguments.\n"); |
621 | printf("Too few arguments.\n"); |
625 | spinlock_unlock(&cmd->lock); |
622 | spinlock_unlock(&cmd->lock); |
626 | return NULL; |
623 | return NULL; |
627 | } |
624 | } |
628 | 625 | ||
629 | error = 0; |
626 | error = 0; |
630 | switch (cmd->argv[i].type) { |
627 | switch (cmd->argv[i].type) { |
631 | case ARG_TYPE_STRING: |
628 | case ARG_TYPE_STRING: |
632 | buf = (char *) cmd->argv[i].buffer; |
629 | buf = (char *) cmd->argv[i].buffer; |
633 | strncpy(buf, (const char *) &cmdline[start], |
630 | strncpy(buf, (const char *) &cmdline[start], |
634 | min((end - start) + 2, cmd->argv[i].len)); |
631 | min((end - start) + 2, cmd->argv[i].len)); |
635 | buf[min((end - start) + 1, cmd->argv[i].len - 1)] = |
632 | buf[min((end - start) + 1, cmd->argv[i].len - 1)] = |
636 | '\0'; |
633 | '\0'; |
637 | break; |
634 | break; |
638 | case ARG_TYPE_INT: |
635 | case ARG_TYPE_INT: |
639 | if (parse_int_arg(cmdline + start, end - start + 1, |
636 | if (parse_int_arg(cmdline + start, end - start + 1, |
640 | &cmd->argv[i].intval)) |
637 | &cmd->argv[i].intval)) |
641 | error = 1; |
638 | error = 1; |
642 | break; |
639 | break; |
643 | case ARG_TYPE_VAR: |
640 | case ARG_TYPE_VAR: |
644 | if (start != end && cmdline[start] == '"' && |
641 | if (start != end && cmdline[start] == '"' && |
645 | cmdline[end] == '"') { |
642 | cmdline[end] == '"') { |
646 | buf = (char *) cmd->argv[i].buffer; |
643 | buf = (char *) cmd->argv[i].buffer; |
647 | strncpy(buf, (const char *) &cmdline[start + 1], |
644 | strncpy(buf, (const char *) &cmdline[start + 1], |
648 | min((end-start), cmd->argv[i].len)); |
645 | min((end-start), cmd->argv[i].len)); |
649 | buf[min((end - start), cmd->argv[i].len - 1)] = |
646 | buf[min((end - start), cmd->argv[i].len - 1)] = |
650 | '\0'; |
647 | '\0'; |
651 | cmd->argv[i].intval = (unative_t) buf; |
648 | cmd->argv[i].intval = (unative_t) buf; |
652 | cmd->argv[i].vartype = ARG_TYPE_STRING; |
649 | cmd->argv[i].vartype = ARG_TYPE_STRING; |
653 | } else if (!parse_int_arg(cmdline + start, |
650 | } else if (!parse_int_arg(cmdline + start, |
654 | end - start + 1, &cmd->argv[i].intval)) { |
651 | end - start + 1, &cmd->argv[i].intval)) { |
655 | cmd->argv[i].vartype = ARG_TYPE_INT; |
652 | cmd->argv[i].vartype = ARG_TYPE_INT; |
656 | } else { |
653 | } else { |
657 | printf("Unrecognized variable argument.\n"); |
654 | printf("Unrecognized variable argument.\n"); |
658 | error = 1; |
655 | error = 1; |
659 | } |
656 | } |
660 | break; |
657 | break; |
661 | case ARG_TYPE_INVALID: |
658 | case ARG_TYPE_INVALID: |
662 | default: |
659 | default: |
663 | printf("invalid argument type\n"); |
660 | printf("invalid argument type\n"); |
664 | error = 1; |
661 | error = 1; |
665 | break; |
662 | break; |
666 | } |
663 | } |
667 | } |
664 | } |
668 | 665 | ||
669 | if (error) { |
666 | if (error) { |
670 | spinlock_unlock(&cmd->lock); |
667 | spinlock_unlock(&cmd->lock); |
671 | return NULL; |
668 | return NULL; |
672 | } |
669 | } |
673 | 670 | ||
674 | start = end + 1; |
671 | start = end + 1; |
675 | if (parse_argument(cmdline, len, &start, &end)) { |
672 | if (parse_argument(cmdline, len, &start, &end)) { |
676 | printf("Too many arguments.\n"); |
673 | printf("Too many arguments.\n"); |
677 | spinlock_unlock(&cmd->lock); |
674 | spinlock_unlock(&cmd->lock); |
678 | return NULL; |
675 | return NULL; |
679 | } |
676 | } |
680 | 677 | ||
681 | spinlock_unlock(&cmd->lock); |
678 | spinlock_unlock(&cmd->lock); |
682 | return cmd; |
679 | return cmd; |
683 | } |
680 | } |
684 | 681 | ||
685 | /** Parse argument. |
682 | /** Parse argument. |
686 | * |
683 | * |
687 | * Find start and end positions of command line argument. |
684 | * Find start and end positions of command line argument. |
688 | * |
685 | * |
689 | * @param cmdline Command line as read from the input device. |
686 | * @param cmdline Command line as read from the input device. |
690 | * @param len Number of characters in cmdline. |
687 | * @param len Number of characters in cmdline. |
691 | * @param start On entry, 'start' contains pointer to the index |
688 | * @param start On entry, 'start' contains pointer to the index |
692 | * of first unprocessed character of cmdline. |
689 | * of first unprocessed character of cmdline. |
693 | * On successful exit, it marks beginning of the next argument. |
690 | * On successful exit, it marks beginning of the next argument. |
694 | * @param end Undefined on entry. On exit, 'end' points to the last character |
691 | * @param end Undefined on entry. On exit, 'end' points to the last character |
695 | * of the next argument. |
692 | * of the next argument. |
696 | * |
693 | * |
697 | * @return false on failure, true on success. |
694 | * @return false on failure, true on success. |
698 | */ |
695 | */ |
699 | bool parse_argument(char *cmdline, size_t len, index_t *start, index_t *end) |
696 | bool parse_argument(char *cmdline, size_t len, index_t *start, index_t *end) |
700 | { |
697 | { |
701 | index_t i; |
698 | index_t i; |
702 | bool found_start = false; |
699 | bool found_start = false; |
703 | 700 | ||
704 | ASSERT(start != NULL); |
701 | ASSERT(start != NULL); |
705 | ASSERT(end != NULL); |
702 | ASSERT(end != NULL); |
706 | 703 | ||
707 | for (i = *start; i < len; i++) { |
704 | for (i = *start; i < len; i++) { |
708 | if (!found_start) { |
705 | if (!found_start) { |
709 | if (isspace(cmdline[i])) |
706 | if (isspace(cmdline[i])) |
710 | (*start)++; |
707 | (*start)++; |
711 | else |
708 | else |
712 | found_start = true; |
709 | found_start = true; |
713 | } else { |
710 | } else { |
714 | if (isspace(cmdline[i])) |
711 | if (isspace(cmdline[i])) |
715 | break; |
712 | break; |
716 | } |
713 | } |
717 | } |
714 | } |
718 | *end = i - 1; |
715 | *end = i - 1; |
719 | 716 | ||
720 | return found_start; |
717 | return found_start; |
721 | } |
718 | } |
722 | 719 | ||
723 | /** @} |
720 | /** @} |
724 | */ |
721 | */ |
725 | 722 |