Rev 4344 | Rev 4346 | Go to most recent revision | Only display areas with differences | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed
Rev 4344 | Rev 4345 | ||
---|---|---|---|
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 <symtab.h> |
53 | #include <symtab.h> |
53 | #include <macros.h> |
54 | #include <macros.h> |
54 | #include <sysinfo/sysinfo.h> |
55 | #include <sysinfo/sysinfo.h> |
55 | #include <ddi/device.h> |
56 | #include <ddi/device.h> |
56 | 57 | ||
57 | /** Simple kernel console. |
58 | /** Simple kernel console. |
58 | * |
59 | * |
59 | * The console is realized by kernel thread kconsole. |
60 | * The console is realized by kernel thread kconsole. |
60 | * It doesn't understand any useful command on its own, |
61 | * It doesn't understand any useful command on its own, |
61 | * but makes it possible for other kernel subsystems to |
62 | * but makes it possible for other kernel subsystems to |
62 | * register their own commands. |
63 | * register their own commands. |
63 | */ |
64 | */ |
64 | 65 | ||
65 | /** Locking. |
66 | /** Locking. |
66 | * |
67 | * |
67 | * There is a list of cmd_info_t structures. This list |
68 | * There is a list of cmd_info_t structures. This list |
68 | * is protected by cmd_lock spinlock. Note that specially |
69 | * is protected by cmd_lock spinlock. Note that specially |
69 | * the link elements of cmd_info_t are protected by |
70 | * the link elements of cmd_info_t are protected by |
70 | * this lock. |
71 | * this lock. |
71 | * |
72 | * |
72 | * Each cmd_info_t also has its own lock, which protects |
73 | * Each cmd_info_t also has its own lock, which protects |
73 | * all elements thereof except the link element. |
74 | * all elements thereof except the link element. |
74 | * |
75 | * |
75 | * cmd_lock must be acquired before any cmd_info lock. |
76 | * cmd_lock must be acquired before any cmd_info lock. |
76 | * When locking two cmd info structures, structure with |
77 | * When locking two cmd info structures, structure with |
77 | * lower address must be locked first. |
78 | * lower address must be locked first. |
78 | */ |
79 | */ |
79 | 80 | ||
80 | SPINLOCK_INITIALIZE(cmd_lock); /**< Lock protecting command list. */ |
81 | SPINLOCK_INITIALIZE(cmd_lock); /**< Lock protecting command list. */ |
81 | LIST_INITIALIZE(cmd_head); /**< Command list. */ |
82 | LIST_INITIALIZE(cmd_head); /**< Command list. */ |
82 | 83 | ||
83 | static cmd_info_t *parse_cmdline(char *cmdline, size_t len); |
84 | static cmd_info_t *parse_cmdline(char *cmdline, size_t len); |
84 | static bool parse_argument(char *cmdline, size_t len, index_t *start, |
85 | static bool parse_argument(char *cmdline, size_t len, index_t *start, |
85 | index_t *end); |
86 | index_t *end); |
86 | static char history[KCONSOLE_HISTORY][MAX_CMDLINE] = {}; |
87 | static char history[KCONSOLE_HISTORY][MAX_CMDLINE] = {}; |
87 | 88 | ||
88 | /* |
89 | /* |
89 | * For now, we use 0 as INR. |
90 | * For now, we use 0 as INR. |
90 | * However, it is therefore desirable to have architecture specific |
91 | * However, it is therefore desirable to have architecture specific |
91 | * definition of KCONSOLE_VIRT_INR in the future. |
92 | * definition of KCONSOLE_VIRT_INR in the future. |
92 | */ |
93 | */ |
93 | #define KCONSOLE_VIRT_INR 0 |
94 | #define KCONSOLE_VIRT_INR 0 |
94 | 95 | ||
95 | bool kconsole_notify = false; |
96 | bool kconsole_notify = false; |
96 | irq_t kconsole_irq; |
97 | irq_t kconsole_irq; |
97 | 98 | ||
98 | 99 | ||
99 | /** Allways refuse IRQ ownership. |
100 | /** Allways refuse IRQ ownership. |
100 | * |
101 | * |
101 | * This is not a real IRQ, so we always decline. |
102 | * This is not a real IRQ, so we always decline. |
102 | * |
103 | * |
103 | * @return Always returns IRQ_DECLINE. |
104 | * @return Always returns IRQ_DECLINE. |
104 | * |
105 | * |
105 | */ |
106 | */ |
106 | static irq_ownership_t kconsole_claim(irq_t *irq) |
107 | static irq_ownership_t kconsole_claim(irq_t *irq) |
107 | { |
108 | { |
108 | return IRQ_DECLINE; |
109 | return IRQ_DECLINE; |
109 | } |
110 | } |
110 | 111 | ||
111 | 112 | ||
112 | /** Initialize kconsole data structures |
113 | /** Initialize kconsole data structures |
113 | * |
114 | * |
114 | * This is the most basic initialization, almost no |
115 | * This is the most basic initialization, almost no |
115 | * other kernel subsystem is ready yet. |
116 | * other kernel subsystem is ready yet. |
116 | * |
117 | * |
117 | */ |
118 | */ |
118 | void kconsole_init(void) |
119 | void kconsole_init(void) |
119 | { |
120 | { |
120 | unsigned int i; |
121 | unsigned int i; |
121 | 122 | ||
122 | cmd_init(); |
123 | cmd_init(); |
123 | for (i = 0; i < KCONSOLE_HISTORY; i++) |
124 | for (i = 0; i < KCONSOLE_HISTORY; i++) |
124 | history[i][0] = '\0'; |
125 | history[i][0] = '\0'; |
125 | } |
126 | } |
126 | 127 | ||
127 | 128 | ||
128 | /** Initialize kconsole notification mechanism |
129 | /** Initialize kconsole notification mechanism |
129 | * |
130 | * |
130 | * Initialize the virtual IRQ notification mechanism. |
131 | * Initialize the virtual IRQ notification mechanism. |
131 | * |
132 | * |
132 | */ |
133 | */ |
133 | void kconsole_notify_init(void) |
134 | void kconsole_notify_init(void) |
134 | { |
135 | { |
135 | devno_t devno = device_assign_devno(); |
136 | devno_t devno = device_assign_devno(); |
136 | 137 | ||
137 | sysinfo_set_item_val("kconsole.present", NULL, true); |
138 | sysinfo_set_item_val("kconsole.present", NULL, true); |
138 | sysinfo_set_item_val("kconsole.devno", NULL, devno); |
139 | sysinfo_set_item_val("kconsole.devno", NULL, devno); |
139 | sysinfo_set_item_val("kconsole.inr", NULL, KCONSOLE_VIRT_INR); |
140 | sysinfo_set_item_val("kconsole.inr", NULL, KCONSOLE_VIRT_INR); |
140 | 141 | ||
141 | irq_initialize(&kconsole_irq); |
142 | irq_initialize(&kconsole_irq); |
142 | kconsole_irq.devno = devno; |
143 | kconsole_irq.devno = devno; |
143 | kconsole_irq.inr = KCONSOLE_VIRT_INR; |
144 | kconsole_irq.inr = KCONSOLE_VIRT_INR; |
144 | kconsole_irq.claim = kconsole_claim; |
145 | kconsole_irq.claim = kconsole_claim; |
145 | irq_register(&kconsole_irq); |
146 | irq_register(&kconsole_irq); |
146 | 147 | ||
147 | kconsole_notify = true; |
148 | kconsole_notify = true; |
148 | } |
149 | } |
149 | 150 | ||
150 | 151 | ||
151 | /** Register kconsole command. |
152 | /** Register kconsole command. |
152 | * |
153 | * |
153 | * @param cmd Structure describing the command. |
154 | * @param cmd Structure describing the command. |
154 | * |
155 | * |
155 | * @return 0 on failure, 1 on success. |
156 | * @return 0 on failure, 1 on success. |
156 | */ |
157 | */ |
157 | int cmd_register(cmd_info_t *cmd) |
158 | int cmd_register(cmd_info_t *cmd) |
158 | { |
159 | { |
159 | link_t *cur; |
160 | link_t *cur; |
160 | 161 | ||
161 | spinlock_lock(&cmd_lock); |
162 | spinlock_lock(&cmd_lock); |
162 | 163 | ||
163 | /* |
164 | /* |
164 | * Make sure the command is not already listed. |
165 | * Make sure the command is not already listed. |
165 | */ |
166 | */ |
166 | for (cur = cmd_head.next; cur != &cmd_head; cur = cur->next) { |
167 | for (cur = cmd_head.next; cur != &cmd_head; cur = cur->next) { |
167 | cmd_info_t *hlp; |
168 | cmd_info_t *hlp; |
168 | 169 | ||
169 | hlp = list_get_instance(cur, cmd_info_t, link); |
170 | hlp = list_get_instance(cur, cmd_info_t, link); |
170 | 171 | ||
171 | if (hlp == cmd) { |
172 | if (hlp == cmd) { |
172 | /* The command is already there. */ |
173 | /* The command is already there. */ |
173 | spinlock_unlock(&cmd_lock); |
174 | spinlock_unlock(&cmd_lock); |
174 | return 0; |
175 | return 0; |
175 | } |
176 | } |
176 | 177 | ||
177 | /* Avoid deadlock. */ |
178 | /* Avoid deadlock. */ |
178 | if (hlp < cmd) { |
179 | if (hlp < cmd) { |
179 | spinlock_lock(&hlp->lock); |
180 | spinlock_lock(&hlp->lock); |
180 | spinlock_lock(&cmd->lock); |
181 | spinlock_lock(&cmd->lock); |
181 | } else { |
182 | } else { |
182 | spinlock_lock(&cmd->lock); |
183 | spinlock_lock(&cmd->lock); |
183 | spinlock_lock(&hlp->lock); |
184 | spinlock_lock(&hlp->lock); |
184 | } |
185 | } |
185 | if ((strncmp(hlp->name, cmd->name, max(strlen(cmd->name), |
186 | if ((strncmp(hlp->name, cmd->name, max(strlen(cmd->name), |
186 | strlen(hlp->name))) == 0)) { |
187 | strlen(hlp->name))) == 0)) { |
187 | /* The command is already there. */ |
188 | /* The command is already there. */ |
188 | spinlock_unlock(&hlp->lock); |
189 | spinlock_unlock(&hlp->lock); |
189 | spinlock_unlock(&cmd->lock); |
190 | spinlock_unlock(&cmd->lock); |
190 | spinlock_unlock(&cmd_lock); |
191 | spinlock_unlock(&cmd_lock); |
191 | return 0; |
192 | return 0; |
192 | } |
193 | } |
193 | 194 | ||
194 | spinlock_unlock(&hlp->lock); |
195 | spinlock_unlock(&hlp->lock); |
195 | spinlock_unlock(&cmd->lock); |
196 | spinlock_unlock(&cmd->lock); |
196 | } |
197 | } |
197 | 198 | ||
198 | /* |
199 | /* |
199 | * Now the command can be added. |
200 | * Now the command can be added. |
200 | */ |
201 | */ |
201 | list_append(&cmd->link, &cmd_head); |
202 | list_append(&cmd->link, &cmd_head); |
202 | 203 | ||
203 | spinlock_unlock(&cmd_lock); |
204 | spinlock_unlock(&cmd_lock); |
204 | return 1; |
205 | return 1; |
205 | } |
206 | } |
206 | 207 | ||
207 | /** Print count times a character */ |
208 | /** Print count times a character */ |
208 | static void rdln_print_c(char ch, int count) |
209 | static void rdln_print_c(char ch, int count) |
209 | { |
210 | { |
210 | int i; |
211 | int i; |
211 | for (i = 0; i < count; i++) |
212 | for (i = 0; i < count; i++) |
212 | putchar(ch); |
213 | putchar(ch); |
213 | } |
214 | } |
214 | 215 | ||
215 | /** Insert character to string */ |
216 | /** Insert character to string */ |
216 | static void insert_char(char *str, char ch, int pos) |
217 | static void insert_char(char *str, char ch, int pos) |
217 | { |
218 | { |
218 | int i; |
219 | int i; |
219 | 220 | ||
220 | for (i = strlen(str); i > pos; i--) |
221 | for (i = strlen(str); i > pos; i--) |
221 | str[i] = str[i - 1]; |
222 | str[i] = str[i - 1]; |
222 | str[pos] = ch; |
223 | str[pos] = ch; |
223 | } |
224 | } |
224 | 225 | ||
225 | /** Try to find a command beginning with prefix */ |
226 | /** Try to find a command beginning with prefix */ |
226 | static const char *cmdtab_search_one(const char *name,link_t **startpos) |
227 | static const char *cmdtab_search_one(const char *name,link_t **startpos) |
227 | { |
228 | { |
228 | size_t namelen = strlen(name); |
229 | size_t namelen = strlen(name); |
229 | const char *curname; |
230 | const char *curname; |
230 | 231 | ||
231 | spinlock_lock(&cmd_lock); |
232 | spinlock_lock(&cmd_lock); |
232 | 233 | ||
233 | if (!*startpos) |
234 | if (!*startpos) |
234 | *startpos = cmd_head.next; |
235 | *startpos = cmd_head.next; |
235 | 236 | ||
236 | for (; *startpos != &cmd_head; *startpos = (*startpos)->next) { |
237 | for (; *startpos != &cmd_head; *startpos = (*startpos)->next) { |
237 | cmd_info_t *hlp; |
238 | cmd_info_t *hlp; |
238 | hlp = list_get_instance(*startpos, cmd_info_t, link); |
239 | hlp = list_get_instance(*startpos, cmd_info_t, link); |
239 | 240 | ||
240 | curname = hlp->name; |
241 | curname = hlp->name; |
241 | if (strlen(curname) < namelen) |
242 | if (strlen(curname) < namelen) |
242 | continue; |
243 | continue; |
243 | if (strncmp(curname, name, namelen) == 0) { |
244 | if (strncmp(curname, name, namelen) == 0) { |
244 | spinlock_unlock(&cmd_lock); |
245 | spinlock_unlock(&cmd_lock); |
245 | return curname+namelen; |
246 | return curname+namelen; |
246 | } |
247 | } |
247 | } |
248 | } |
248 | spinlock_unlock(&cmd_lock); |
249 | spinlock_unlock(&cmd_lock); |
249 | return NULL; |
250 | return NULL; |
250 | } |
251 | } |
251 | 252 | ||
252 | 253 | ||
253 | /** Command completion of the commands |
254 | /** Command completion of the commands |
254 | * |
255 | * |
255 | * @param name - string to match, changed to hint on exit |
256 | * @param name - string to match, changed to hint on exit |
256 | * @return number of found matches |
257 | * @return number of found matches |
257 | */ |
258 | */ |
258 | static int cmdtab_compl(char *name) |
259 | static int cmdtab_compl(char *name) |
259 | { |
260 | { |
260 | static char output[MAX_SYMBOL_NAME + 1]; |
261 | static char output[MAX_SYMBOL_NAME + 1]; |
261 | link_t *startpos = NULL; |
262 | link_t *startpos = NULL; |
262 | const char *foundtxt; |
263 | const char *foundtxt; |
263 | int found = 0; |
264 | int found = 0; |
264 | int i; |
265 | int i; |
265 | 266 | ||
266 | output[0] = '\0'; |
267 | output[0] = '\0'; |
267 | while ((foundtxt = cmdtab_search_one(name, &startpos))) { |
268 | while ((foundtxt = cmdtab_search_one(name, &startpos))) { |
268 | startpos = startpos->next; |
269 | startpos = startpos->next; |
269 | if (!found) |
270 | if (!found) |
270 | strncpy(output, foundtxt, strlen(foundtxt) + 1); |
271 | strncpy(output, foundtxt, strlen(foundtxt) + 1); |
271 | else { |
272 | else { |
272 | for (i = 0; output[i] && foundtxt[i] && |
273 | for (i = 0; output[i] && foundtxt[i] && |
273 | output[i] == foundtxt[i]; i++) |
274 | output[i] == foundtxt[i]; i++) |
274 | ; |
275 | ; |
275 | output[i] = '\0'; |
276 | output[i] = '\0'; |
276 | } |
277 | } |
277 | found++; |
278 | found++; |
278 | } |
279 | } |
279 | if (!found) |
280 | if (!found) |
280 | return 0; |
281 | return 0; |
281 | 282 | ||
282 | if (found > 1 && !strlen(output)) { |
283 | if (found > 1 && !strlen(output)) { |
283 | printf("\n"); |
284 | printf("\n"); |
284 | startpos = NULL; |
285 | startpos = NULL; |
285 | while ((foundtxt = cmdtab_search_one(name, &startpos))) { |
286 | while ((foundtxt = cmdtab_search_one(name, &startpos))) { |
286 | cmd_info_t *hlp; |
287 | cmd_info_t *hlp; |
287 | hlp = list_get_instance(startpos, cmd_info_t, link); |
288 | hlp = list_get_instance(startpos, cmd_info_t, link); |
288 | printf("%s - %s\n", hlp->name, hlp->description); |
289 | printf("%s - %s\n", hlp->name, hlp->description); |
289 | startpos = startpos->next; |
290 | startpos = startpos->next; |
290 | } |
291 | } |
291 | } |
292 | } |
292 | strncpy(name, output, MAX_SYMBOL_NAME); |
293 | strncpy(name, output, MAX_SYMBOL_NAME); |
293 | return found; |
294 | return found; |
294 | 295 | ||
295 | } |
296 | } |
296 | 297 | ||
297 | static char *clever_readline(const char *prompt, chardev_t *input) |
298 | static char *clever_readline(const char *prompt, chardev_t *input) |
298 | { |
299 | { |
299 | static int histposition = 0; |
300 | static int histposition = 0; |
300 | 301 | ||
301 | static char tmp[MAX_CMDLINE + 1]; |
302 | static char tmp[MAX_CMDLINE + 1]; |
302 | int curlen = 0, position = 0; |
303 | int curlen = 0, position = 0; |
303 | char *current = history[histposition]; |
304 | char *current = history[histposition]; |
304 | int i; |
305 | int i; |
305 | char mod; /* Command Modifier */ |
306 | char mod; /* Command Modifier */ |
306 | char c; |
307 | char c; |
307 | 308 | ||
308 | printf("%s> ", prompt); |
309 | printf("%s> ", prompt); |
309 | while (1) { |
310 | while (1) { |
310 | c = _getc(input); |
311 | c = _getc(input); |
311 | if (c == '\n') { |
312 | if (c == '\n') { |
312 | putchar(c); |
313 | putchar(c); |
313 | break; |
314 | break; |
314 | } |
315 | } |
315 | if (c == '\b') { /* Backspace */ |
316 | if (c == '\b') { /* Backspace */ |
316 | if (position == 0) |
317 | if (position == 0) |
317 | continue; |
318 | continue; |
318 | for (i = position; i < curlen; i++) |
319 | for (i = position; i < curlen; i++) |
319 | current[i - 1] = current[i]; |
320 | current[i - 1] = current[i]; |
320 | curlen--; |
321 | curlen--; |
321 | position--; |
322 | position--; |
322 | putchar('\b'); |
323 | putchar('\b'); |
323 | for (i = position; i < curlen; i++) |
324 | for (i = position; i < curlen; i++) |
324 | putchar(current[i]); |
325 | putchar(current[i]); |
325 | putchar(' '); |
326 | putchar(' '); |
326 | rdln_print_c('\b', curlen - position + 1); |
327 | rdln_print_c('\b', curlen - position + 1); |
327 | continue; |
328 | continue; |
328 | } |
329 | } |
329 | if (c == '\t') { /* Tabulator */ |
330 | if (c == '\t') { /* Tabulator */ |
330 | int found; |
331 | int found; |
331 | 332 | ||
332 | /* Move to the end of the word */ |
333 | /* Move to the end of the word */ |
333 | for (; position < curlen && current[position] != ' '; |
334 | for (; position < curlen && current[position] != ' '; |
334 | position++) |
335 | position++) |
335 | putchar(current[position]); |
336 | putchar(current[position]); |
336 | /* Copy to tmp last word */ |
337 | /* Copy to tmp last word */ |
337 | for (i = position - 1; i >= 0 && current[i] != ' '; i--) |
338 | for (i = position - 1; i >= 0 && current[i] != ' '; i--) |
338 | ; |
339 | ; |
339 | /* If word begins with * or &, skip it */ |
340 | /* If word begins with * or &, skip it */ |
340 | if (tmp[0] == '*' || tmp[0] == '&') |
341 | if (tmp[0] == '*' || tmp[0] == '&') |
341 | for (i = 1; tmp[i]; i++) |
342 | for (i = 1; tmp[i]; i++) |
342 | tmp[i - 1] = tmp[i]; |
343 | tmp[i - 1] = tmp[i]; |
343 | i++; /* I is at the start of the word */ |
344 | i++; /* I is at the start of the word */ |
344 | strncpy(tmp, current + i, position - i + 1); |
345 | strncpy(tmp, current + i, position - i + 1); |
345 | 346 | ||
346 | if (i == 0) { /* Command completion */ |
347 | if (i == 0) { /* Command completion */ |
347 | found = cmdtab_compl(tmp); |
348 | found = cmdtab_compl(tmp); |
348 | } else { /* Symtab completion */ |
349 | } else { /* Symtab completion */ |
349 | found = symtab_compl(tmp); |
350 | found = symtab_compl(tmp); |
350 | } |
351 | } |
351 | 352 | ||
352 | if (found == 0) |
353 | if (found == 0) |
353 | continue; |
354 | continue; |
354 | for (i = 0; tmp[i] && curlen < MAX_CMDLINE; |
355 | for (i = 0; tmp[i] && curlen < MAX_CMDLINE; |
355 | i++, curlen++) |
356 | i++, curlen++) |
356 | insert_char(current, tmp[i], i + position); |
357 | insert_char(current, tmp[i], i + position); |
357 | 358 | ||
358 | if (strlen(tmp) || found == 1) { /* If we have a hint */ |
359 | if (strlen(tmp) || found == 1) { /* If we have a hint */ |
359 | for (i = position; i < curlen; i++) |
360 | for (i = position; i < curlen; i++) |
360 | putchar(current[i]); |
361 | putchar(current[i]); |
361 | position += strlen(tmp); |
362 | position += strlen(tmp); |
362 | /* Add space to end */ |
363 | /* Add space to end */ |
363 | if (found == 1 && position == curlen && |
364 | if (found == 1 && position == curlen && |
364 | curlen < MAX_CMDLINE) { |
365 | curlen < MAX_CMDLINE) { |
365 | current[position] = ' '; |
366 | current[position] = ' '; |
366 | curlen++; |
367 | curlen++; |
367 | position++; |
368 | position++; |
368 | putchar(' '); |
369 | putchar(' '); |
369 | } |
370 | } |
370 | } else { /* No hint, table was printed */ |
371 | } else { /* No hint, table was printed */ |
371 | printf("%s> ", prompt); |
372 | printf("%s> ", prompt); |
372 | for (i = 0; i < curlen; i++) |
373 | for (i = 0; i < curlen; i++) |
373 | putchar(current[i]); |
374 | putchar(current[i]); |
374 | position += strlen(tmp); |
375 | position += strlen(tmp); |
375 | } |
376 | } |
376 | rdln_print_c('\b', curlen - position); |
377 | rdln_print_c('\b', curlen - position); |
377 | continue; |
378 | continue; |
378 | } |
379 | } |
379 | if (c == 0x1b) { /* Special command */ |
380 | if (c == 0x1b) { /* Special command */ |
380 | mod = _getc(input); |
381 | mod = _getc(input); |
381 | c = _getc(input); |
382 | c = _getc(input); |
382 | 383 | ||
383 | if (mod != 0x5b && mod != 0x4f) |
384 | if (mod != 0x5b && mod != 0x4f) |
384 | continue; |
385 | continue; |
385 | 386 | ||
386 | if (c == 0x33 && _getc(input) == 0x7e) { |
387 | if (c == 0x33 && _getc(input) == 0x7e) { |
387 | /* Delete */ |
388 | /* Delete */ |
388 | if (position == curlen) |
389 | if (position == curlen) |
389 | continue; |
390 | continue; |
390 | for (i = position + 1; i < curlen; i++) { |
391 | for (i = position + 1; i < curlen; i++) { |
391 | putchar(current[i]); |
392 | putchar(current[i]); |
392 | current[i - 1] = current[i]; |
393 | current[i - 1] = current[i]; |
393 | } |
394 | } |
394 | putchar(' '); |
395 | putchar(' '); |
395 | rdln_print_c('\b', curlen - position); |
396 | rdln_print_c('\b', curlen - position); |
396 | curlen--; |
397 | curlen--; |
397 | } else if (c == 0x48) { /* Home */ |
398 | } else if (c == 0x48) { /* Home */ |
398 | rdln_print_c('\b', position); |
399 | rdln_print_c('\b', position); |
399 | position = 0; |
400 | position = 0; |
400 | } else if (c == 0x46) { /* End */ |
401 | } else if (c == 0x46) { /* End */ |
401 | for (i = position; i < curlen; i++) |
402 | for (i = position; i < curlen; i++) |
402 | putchar(current[i]); |
403 | putchar(current[i]); |
403 | position = curlen; |
404 | position = curlen; |
404 | } else if (c == 0x44) { /* Left */ |
405 | } else if (c == 0x44) { /* Left */ |
405 | if (position > 0) { |
406 | if (position > 0) { |
406 | putchar('\b'); |
407 | putchar('\b'); |
407 | position--; |
408 | position--; |
408 | } |
409 | } |
409 | continue; |
410 | continue; |
410 | } else if (c == 0x43) { /* Right */ |
411 | } else if (c == 0x43) { /* Right */ |
411 | if (position < curlen) { |
412 | if (position < curlen) { |
412 | putchar(current[position]); |
413 | putchar(current[position]); |
413 | position++; |
414 | position++; |
414 | } |
415 | } |
415 | continue; |
416 | continue; |
416 | } else if (c == 0x41 || c == 0x42) { |
417 | } else if (c == 0x41 || c == 0x42) { |
417 | /* Up, down */ |
418 | /* Up, down */ |
418 | rdln_print_c('\b', position); |
419 | rdln_print_c('\b', position); |
419 | rdln_print_c(' ', curlen); |
420 | rdln_print_c(' ', curlen); |
420 | rdln_print_c('\b', curlen); |
421 | rdln_print_c('\b', curlen); |
421 | if (c == 0x41) /* Up */ |
422 | if (c == 0x41) /* Up */ |
422 | histposition--; |
423 | histposition--; |
423 | else |
424 | else |
424 | histposition++; |
425 | histposition++; |
425 | if (histposition < 0) { |
426 | if (histposition < 0) { |
426 | histposition = KCONSOLE_HISTORY - 1; |
427 | histposition = KCONSOLE_HISTORY - 1; |
427 | } else { |
428 | } else { |
428 | histposition = |
429 | histposition = |
429 | histposition % KCONSOLE_HISTORY; |
430 | histposition % KCONSOLE_HISTORY; |
430 | } |
431 | } |
431 | current = history[histposition]; |
432 | current = history[histposition]; |
432 | printf("%s", current); |
433 | printf("%s", current); |
433 | curlen = strlen(current); |
434 | curlen = strlen(current); |
434 | position = curlen; |
435 | position = curlen; |
435 | continue; |
436 | continue; |
436 | } |
437 | } |
437 | continue; |
438 | continue; |
438 | } |
439 | } |
439 | if (curlen >= MAX_CMDLINE) |
440 | if (curlen >= MAX_CMDLINE) |
440 | continue; |
441 | continue; |
441 | 442 | ||
442 | insert_char(current, c, position); |
443 | insert_char(current, c, position); |
443 | 444 | ||
444 | curlen++; |
445 | curlen++; |
445 | for (i = position; i < curlen; i++) |
446 | for (i = position; i < curlen; i++) |
446 | putchar(current[i]); |
447 | putchar(current[i]); |
447 | position++; |
448 | position++; |
448 | rdln_print_c('\b',curlen - position); |
449 | rdln_print_c('\b',curlen - position); |
449 | } |
450 | } |
450 | if (curlen) { |
451 | if (curlen) { |
451 | histposition++; |
452 | histposition++; |
452 | histposition = histposition % KCONSOLE_HISTORY; |
453 | histposition = histposition % KCONSOLE_HISTORY; |
453 | } |
454 | } |
454 | current[curlen] = '\0'; |
455 | current[curlen] = '\0'; |
455 | return current; |
456 | return current; |
456 | } |
457 | } |
457 | 458 | ||
458 | /** Kernel console prompt. |
459 | /** Kernel console prompt. |
459 | * |
460 | * |
460 | * @param prompt Kernel console prompt (e.g kconsole/panic). |
461 | * @param prompt Kernel console prompt (e.g kconsole/panic). |
461 | * @param msg Message to display in the beginning. |
462 | * @param msg Message to display in the beginning. |
462 | * @param kcon Wait for keypress to show the prompt |
463 | * @param kcon Wait for keypress to show the prompt |
463 | * and never exit. |
464 | * and never exit. |
464 | * |
465 | * |
465 | */ |
466 | */ |
466 | void kconsole(char *prompt, char *msg, bool kcon) |
467 | void kconsole(char *prompt, char *msg, bool kcon) |
467 | { |
468 | { |
468 | cmd_info_t *cmd_info; |
469 | cmd_info_t *cmd_info; |
469 | count_t len; |
470 | count_t len; |
470 | char *cmdline; |
471 | char *cmdline; |
471 | 472 | ||
472 | if (!stdin) { |
473 | if (!stdin) { |
473 | LOG("No stdin for kernel console"); |
474 | LOG("No stdin for kernel console"); |
474 | return; |
475 | return; |
475 | } |
476 | } |
476 | 477 | ||
477 | if (msg) |
478 | if (msg) |
478 | printf("%s", msg); |
479 | printf("%s", msg); |
479 | 480 | ||
480 | if (kcon) |
481 | if (kcon) |
481 | _getc(stdin); |
482 | _getc(stdin); |
482 | 483 | ||
483 | while (true) { |
484 | while (true) { |
484 | cmdline = clever_readline((char *) prompt, stdin); |
485 | cmdline = clever_readline((char *) prompt, stdin); |
485 | len = strlen(cmdline); |
486 | len = strlen(cmdline); |
486 | if (!len) |
487 | if (!len) |
487 | continue; |
488 | continue; |
488 | 489 | ||
489 | cmd_info = parse_cmdline(cmdline, len); |
490 | cmd_info = parse_cmdline(cmdline, len); |
490 | if (!cmd_info) |
491 | if (!cmd_info) |
491 | continue; |
492 | continue; |
492 | 493 | ||
493 | if ((!kcon) |
494 | if ((!kcon) |
494 | && (strncmp(cmd_info->name, "exit", min(strlen(cmd_info->name), 5)) == 0)) |
495 | && (strncmp(cmd_info->name, "exit", min(strlen(cmd_info->name), 5)) == 0)) |
495 | break; |
496 | break; |
496 | 497 | ||
497 | (void) cmd_info->func(cmd_info->argv); |
498 | (void) cmd_info->func(cmd_info->argv); |
498 | } |
499 | } |
499 | } |
500 | } |
500 | 501 | ||
501 | /** Kernel console managing thread. |
502 | /** Kernel console managing thread. |
502 | * |
503 | * |
503 | */ |
504 | */ |
504 | void kconsole_thread(void *data) |
505 | void kconsole_thread(void *data) |
505 | { |
506 | { |
506 | kconsole("kconsole", "Kernel console ready (press any key to activate)\n", true); |
507 | kconsole("kconsole", "Kernel console ready (press any key to activate)\n", true); |
507 | } |
508 | } |
508 | 509 | ||
509 | static int parse_int_arg(char *text, size_t len, unative_t *result) |
510 | static int parse_int_arg(char *text, size_t len, unative_t *result) |
510 | { |
511 | { |
511 | static char symname[MAX_SYMBOL_NAME]; |
512 | static char symname[MAX_SYMBOL_NAME]; |
512 | uintptr_t symaddr; |
513 | uintptr_t symaddr; |
513 | bool isaddr = false; |
514 | bool isaddr = false; |
514 | bool isptr = false; |
515 | bool isptr = false; |
515 | 516 | ||
516 | /* If we get a name, try to find it in symbol table */ |
517 | /* If we get a name, try to find it in symbol table */ |
517 | if (text[0] == '&') { |
518 | if (text[0] == '&') { |
518 | isaddr = true; |
519 | isaddr = true; |
519 | text++; |
520 | text++; |
520 | len--; |
521 | len--; |
521 | } else if (text[0] == '*') { |
522 | } else if (text[0] == '*') { |
522 | isptr = true; |
523 | isptr = true; |
523 | text++; |
524 | text++; |
524 | len--; |
525 | len--; |
525 | } |
526 | } |
526 | if (text[0] < '0' || text[0] > '9') { |
527 | if (text[0] < '0' || text[0] > '9') { |
527 | strncpy(symname, text, min(len + 1, MAX_SYMBOL_NAME)); |
528 | strncpy(symname, text, min(len + 1, MAX_SYMBOL_NAME)); |
528 | symaddr = get_symbol_addr(symname); |
529 | symaddr = get_symbol_addr(symname); |
529 | if (!symaddr) { |
530 | if (!symaddr) { |
530 | printf("Symbol %s not found.\n", symname); |
531 | printf("Symbol %s not found.\n", symname); |
531 | return -1; |
532 | return -1; |
532 | } |
533 | } |
533 | if (symaddr == (uintptr_t) -1) { |
534 | if (symaddr == (uintptr_t) -1) { |
534 | printf("Duplicate symbol %s.\n", symname); |
535 | printf("Duplicate symbol %s.\n", symname); |
535 | symtab_print_search(symname); |
536 | symtab_print_search(symname); |
536 | return -1; |
537 | return -1; |
537 | } |
538 | } |
538 | if (isaddr) |
539 | if (isaddr) |
539 | *result = (unative_t)symaddr; |
540 | *result = (unative_t)symaddr; |
540 | else if (isptr) |
541 | else if (isptr) |
541 | *result = **((unative_t **)symaddr); |
542 | *result = **((unative_t **)symaddr); |
542 | else |
543 | else |
543 | *result = *((unative_t *)symaddr); |
544 | *result = *((unative_t *)symaddr); |
544 | } else { /* It's a number - convert it */ |
545 | } else { /* It's a number - convert it */ |
545 | *result = atoi(text); |
546 | *result = atoi(text); |
546 | if (isptr) |
547 | if (isptr) |
547 | *result = *((unative_t *)*result); |
548 | *result = *((unative_t *)*result); |
548 | } |
549 | } |
549 | 550 | ||
550 | return 0; |
551 | return 0; |
551 | } |
552 | } |
552 | 553 | ||
553 | /** Parse command line. |
554 | /** Parse command line. |
554 | * |
555 | * |
555 | * @param cmdline Command line as read from input device. |
556 | * @param cmdline Command line as read from input device. |
556 | * @param len Command line length. |
557 | * @param len Command line length. |
557 | * |
558 | * |
558 | * @return Structure describing the command. |
559 | * @return Structure describing the command. |
559 | */ |
560 | */ |
560 | cmd_info_t *parse_cmdline(char *cmdline, size_t len) |
561 | cmd_info_t *parse_cmdline(char *cmdline, size_t len) |
561 | { |
562 | { |
562 | index_t start = 0, end = 0; |
563 | index_t start = 0, end = 0; |
563 | cmd_info_t *cmd = NULL; |
564 | cmd_info_t *cmd = NULL; |
564 | link_t *cur; |
565 | link_t *cur; |
565 | count_t i; |
566 | count_t i; |
566 | int error = 0; |
567 | int error = 0; |
567 | 568 | ||
568 | if (!parse_argument(cmdline, len, &start, &end)) { |
569 | if (!parse_argument(cmdline, len, &start, &end)) { |
569 | /* Command line did not contain alphanumeric word. */ |
570 | /* Command line did not contain alphanumeric word. */ |
570 | return NULL; |
571 | return NULL; |
571 | } |
572 | } |
572 | 573 | ||
573 | spinlock_lock(&cmd_lock); |
574 | spinlock_lock(&cmd_lock); |
574 | 575 | ||
575 | for (cur = cmd_head.next; cur != &cmd_head; cur = cur->next) { |
576 | for (cur = cmd_head.next; cur != &cmd_head; cur = cur->next) { |
576 | cmd_info_t *hlp; |
577 | cmd_info_t *hlp; |
577 | 578 | ||
578 | hlp = list_get_instance(cur, cmd_info_t, link); |
579 | hlp = list_get_instance(cur, cmd_info_t, link); |
579 | spinlock_lock(&hlp->lock); |
580 | spinlock_lock(&hlp->lock); |
580 | 581 | ||
581 | if (strncmp(hlp->name, &cmdline[start], max(strlen(hlp->name), |
582 | if (strncmp(hlp->name, &cmdline[start], max(strlen(hlp->name), |
582 | end - start + 1)) == 0) { |
583 | end - start + 1)) == 0) { |
583 | cmd = hlp; |
584 | cmd = hlp; |
584 | break; |
585 | break; |
585 | } |
586 | } |
586 | 587 | ||
587 | spinlock_unlock(&hlp->lock); |
588 | spinlock_unlock(&hlp->lock); |
588 | } |
589 | } |
589 | 590 | ||
590 | spinlock_unlock(&cmd_lock); |
591 | spinlock_unlock(&cmd_lock); |
591 | 592 | ||
592 | if (!cmd) { |
593 | if (!cmd) { |
593 | /* Unknown command. */ |
594 | /* Unknown command. */ |
594 | printf("Unknown command.\n"); |
595 | printf("Unknown command.\n"); |
595 | return NULL; |
596 | return NULL; |
596 | } |
597 | } |
597 | 598 | ||
598 | /* cmd == hlp is locked */ |
599 | /* cmd == hlp is locked */ |
599 | 600 | ||
600 | /* |
601 | /* |
601 | * The command line must be further analyzed and |
602 | * The command line must be further analyzed and |
602 | * the parameters therefrom must be matched and |
603 | * the parameters therefrom must be matched and |
603 | * converted to those specified in the cmd info |
604 | * converted to those specified in the cmd info |
604 | * structure. |
605 | * structure. |
605 | */ |
606 | */ |
606 | 607 | ||
607 | for (i = 0; i < cmd->argc; i++) { |
608 | for (i = 0; i < cmd->argc; i++) { |
608 | char *buf; |
609 | char *buf; |
609 | start = end + 1; |
610 | start = end + 1; |
610 | if (!parse_argument(cmdline, len, &start, &end)) { |
611 | if (!parse_argument(cmdline, len, &start, &end)) { |
611 | printf("Too few arguments.\n"); |
612 | printf("Too few arguments.\n"); |
612 | spinlock_unlock(&cmd->lock); |
613 | spinlock_unlock(&cmd->lock); |
613 | return NULL; |
614 | return NULL; |
614 | } |
615 | } |
615 | 616 | ||
616 | error = 0; |
617 | error = 0; |
617 | switch (cmd->argv[i].type) { |
618 | switch (cmd->argv[i].type) { |
618 | case ARG_TYPE_STRING: |
619 | case ARG_TYPE_STRING: |
619 | buf = (char *) cmd->argv[i].buffer; |
620 | buf = (char *) cmd->argv[i].buffer; |
620 | strncpy(buf, (const char *) &cmdline[start], |
621 | strncpy(buf, (const char *) &cmdline[start], |
621 | min((end - start) + 2, cmd->argv[i].len)); |
622 | min((end - start) + 2, cmd->argv[i].len)); |
622 | buf[min((end - start) + 1, cmd->argv[i].len - 1)] = |
623 | buf[min((end - start) + 1, cmd->argv[i].len - 1)] = |
623 | '\0'; |
624 | '\0'; |
624 | break; |
625 | break; |
625 | case ARG_TYPE_INT: |
626 | case ARG_TYPE_INT: |
626 | if (parse_int_arg(cmdline + start, end - start + 1, |
627 | if (parse_int_arg(cmdline + start, end - start + 1, |
627 | &cmd->argv[i].intval)) |
628 | &cmd->argv[i].intval)) |
628 | error = 1; |
629 | error = 1; |
629 | break; |
630 | break; |
630 | case ARG_TYPE_VAR: |
631 | case ARG_TYPE_VAR: |
631 | if (start != end && cmdline[start] == '"' && |
632 | if (start != end && cmdline[start] == '"' && |
632 | cmdline[end] == '"') { |
633 | cmdline[end] == '"') { |
633 | buf = (char *) cmd->argv[i].buffer; |
634 | buf = (char *) cmd->argv[i].buffer; |
634 | strncpy(buf, (const char *) &cmdline[start + 1], |
635 | strncpy(buf, (const char *) &cmdline[start + 1], |
635 | min((end-start), cmd->argv[i].len)); |
636 | min((end-start), cmd->argv[i].len)); |
636 | buf[min((end - start), cmd->argv[i].len - 1)] = |
637 | buf[min((end - start), cmd->argv[i].len - 1)] = |
637 | '\0'; |
638 | '\0'; |
638 | cmd->argv[i].intval = (unative_t) buf; |
639 | cmd->argv[i].intval = (unative_t) buf; |
639 | cmd->argv[i].vartype = ARG_TYPE_STRING; |
640 | cmd->argv[i].vartype = ARG_TYPE_STRING; |
640 | } else if (!parse_int_arg(cmdline + start, |
641 | } else if (!parse_int_arg(cmdline + start, |
641 | end - start + 1, &cmd->argv[i].intval)) { |
642 | end - start + 1, &cmd->argv[i].intval)) { |
642 | cmd->argv[i].vartype = ARG_TYPE_INT; |
643 | cmd->argv[i].vartype = ARG_TYPE_INT; |
643 | } else { |
644 | } else { |
644 | printf("Unrecognized variable argument.\n"); |
645 | printf("Unrecognized variable argument.\n"); |
645 | error = 1; |
646 | error = 1; |
646 | } |
647 | } |
647 | break; |
648 | break; |
648 | case ARG_TYPE_INVALID: |
649 | case ARG_TYPE_INVALID: |
649 | default: |
650 | default: |
650 | printf("invalid argument type\n"); |
651 | printf("invalid argument type\n"); |
651 | error = 1; |
652 | error = 1; |
652 | break; |
653 | break; |
653 | } |
654 | } |
654 | } |
655 | } |
655 | 656 | ||
656 | if (error) { |
657 | if (error) { |
657 | spinlock_unlock(&cmd->lock); |
658 | spinlock_unlock(&cmd->lock); |
658 | return NULL; |
659 | return NULL; |
659 | } |
660 | } |
660 | 661 | ||
661 | start = end + 1; |
662 | start = end + 1; |
662 | if (parse_argument(cmdline, len, &start, &end)) { |
663 | if (parse_argument(cmdline, len, &start, &end)) { |
663 | printf("Too many arguments.\n"); |
664 | printf("Too many arguments.\n"); |
664 | spinlock_unlock(&cmd->lock); |
665 | spinlock_unlock(&cmd->lock); |
665 | return NULL; |
666 | return NULL; |
666 | } |
667 | } |
667 | 668 | ||
668 | spinlock_unlock(&cmd->lock); |
669 | spinlock_unlock(&cmd->lock); |
669 | return cmd; |
670 | return cmd; |
670 | } |
671 | } |
671 | 672 | ||
672 | /** Parse argument. |
673 | /** Parse argument. |
673 | * |
674 | * |
674 | * Find start and end positions of command line argument. |
675 | * Find start and end positions of command line argument. |
675 | * |
676 | * |
676 | * @param cmdline Command line as read from the input device. |
677 | * @param cmdline Command line as read from the input device. |
677 | * @param len Number of characters in cmdline. |
678 | * @param len Number of characters in cmdline. |
678 | * @param start On entry, 'start' contains pointer to the index |
679 | * @param start On entry, 'start' contains pointer to the index |
679 | * of first unprocessed character of cmdline. |
680 | * of first unprocessed character of cmdline. |
680 | * On successful exit, it marks beginning of the next argument. |
681 | * On successful exit, it marks beginning of the next argument. |
681 | * @param end Undefined on entry. On exit, 'end' points to the last character |
682 | * @param end Undefined on entry. On exit, 'end' points to the last character |
682 | * of the next argument. |
683 | * of the next argument. |
683 | * |
684 | * |
684 | * @return false on failure, true on success. |
685 | * @return false on failure, true on success. |
685 | */ |
686 | */ |
686 | bool parse_argument(char *cmdline, size_t len, index_t *start, index_t *end) |
687 | bool parse_argument(char *cmdline, size_t len, index_t *start, index_t *end) |
687 | { |
688 | { |
688 | index_t i; |
689 | index_t i; |
689 | bool found_start = false; |
690 | bool found_start = false; |
690 | 691 | ||
691 | ASSERT(start != NULL); |
692 | ASSERT(start != NULL); |
692 | ASSERT(end != NULL); |
693 | ASSERT(end != NULL); |
693 | 694 | ||
694 | for (i = *start; i < len; i++) { |
695 | for (i = *start; i < len; i++) { |
695 | if (!found_start) { |
696 | if (!found_start) { |
696 | if (isspace(cmdline[i])) |
697 | if (isspace(cmdline[i])) |
697 | (*start)++; |
698 | (*start)++; |
698 | else |
699 | else |
699 | found_start = true; |
700 | found_start = true; |
700 | } else { |
701 | } else { |
701 | if (isspace(cmdline[i])) |
702 | if (isspace(cmdline[i])) |
702 | break; |
703 | break; |
703 | } |
704 | } |
704 | } |
705 | } |
705 | *end = i - 1; |
706 | *end = i - 1; |
706 | 707 | ||
707 | return found_start; |
708 | return found_start; |
708 | } |
709 | } |
709 | 710 | ||
710 | /** @} |
711 | /** @} |
711 | */ |
712 | */ |
712 | 713 |