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510 jermar 1
/*
2071 jermar 2
 * Copyright (c) 2005 Jakub Jermar
510 jermar 3
 * All rights reserved.
4
 *
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
7
 * are met:
8
 *
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
11
 * - Redistributions in binary form must reproduce the above copyright
12
 *   notice, this list of conditions and the following disclaimer in the
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
15
 *   derived from this software without specific prior written permission.
16
 *
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
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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
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
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
28
 
1888 jermar 29
/** @addtogroup genericconsole
1702 cejka 30
 * @{
31
 */
32
 
1264 jermar 33
/**
34
 * @file    kconsole.c
35
 * @brief   Kernel console.
36
 *
37
 * This file contains kernel thread managing the kernel console.
38
 */
39
 
518 jermar 40
#include <console/kconsole.h>
510 jermar 41
#include <console/console.h>
42
#include <console/chardev.h>
596 jermar 43
#include <console/cmd.h>
510 jermar 44
#include <print.h>
517 jermar 45
#include <panic.h>
510 jermar 46
#include <arch/types.h>
788 jermar 47
#include <adt/list.h>
517 jermar 48
#include <arch.h>
49
#include <macros.h>
518 jermar 50
#include <debug.h>
596 jermar 51
#include <func.h>
4055 trochtova 52
#include <string.h>
582 palkovsky 53
#include <symtab.h>
609 palkovsky 54
#include <macros.h>
4055 trochtova 55
#include <sysinfo/sysinfo.h>
56
#include <ddi/device.h>
510 jermar 57
 
517 jermar 58
/** Simple kernel console.
59
 *
60
 * The console is realized by kernel thread kconsole.
518 jermar 61
 * It doesn't understand any useful command on its own,
62
 * but makes it possible for other kernel subsystems to
517 jermar 63
 * register their own commands.
64
 */
65
 
66
/** Locking.
67
 *
68
 * There is a list of cmd_info_t structures. This list
69
 * is protected by cmd_lock spinlock. Note that specially
70
 * the link elements of cmd_info_t are protected by
71
 * this lock.
72
 *
73
 * Each cmd_info_t also has its own lock, which protects
74
 * all elements thereof except the link element.
75
 *
76
 * cmd_lock must be acquired before any cmd_info lock.
77
 * When locking two cmd info structures, structure with
78
 * lower address must be locked first.
79
 */
80
 
623 jermar 81
SPINLOCK_INITIALIZE(cmd_lock);  /**< Lock protecting command list. */
624 jermar 82
LIST_INITIALIZE(cmd_head);  /**< Command list. */
517 jermar 83
 
84
static cmd_info_t *parse_cmdline(char *cmdline, size_t len);
2108 jermar 85
static bool parse_argument(char *cmdline, size_t len, index_t *start,
86
    index_t *end);
601 palkovsky 87
static char history[KCONSOLE_HISTORY][MAX_CMDLINE] = {};
517 jermar 88
 
4055 trochtova 89
/*
90
 * For now, we use 0 as INR.
91
 * However, it is therefore desirable to have architecture specific
92
 * definition of KCONSOLE_VIRT_INR in the future.
93
 */
94
#define KCONSOLE_VIRT_INR  0
95
 
96
bool kconsole_notify = false;
97
irq_t kconsole_irq;
98
 
99
 
100
/** Allways refuse IRQ ownership.
101
 *
102
 * This is not a real IRQ, so we always decline.
103
 *
104
 * @return Always returns IRQ_DECLINE.
105
 *
106
 */
107
static irq_ownership_t kconsole_claim(irq_t *irq)
108
{
109
    return IRQ_DECLINE;
110
}
111
 
112
 
113
/** Initialize kconsole data structures
114
 *
115
 * This is the most basic initialization, almost no
116
 * other kernel subsystem is ready yet.
117
 *
118
 */
517 jermar 119
void kconsole_init(void)
120
{
4055 trochtova 121
    unsigned int i;
601 palkovsky 122
 
596 jermar 123
    cmd_init();
2108 jermar 124
    for (i = 0; i < KCONSOLE_HISTORY; i++)
601 palkovsky 125
        history[i][0] = '\0';
517 jermar 126
}
127
 
128
 
4055 trochtova 129
/** Initialize kconsole notification mechanism
130
 *
131
 * Initialize the virtual IRQ notification mechanism.
132
 *
133
 */
134
void kconsole_notify_init(void)
135
{
136
    devno_t devno = device_assign_devno();
137
 
138
    sysinfo_set_item_val("kconsole.present", NULL, true);
139
    sysinfo_set_item_val("kconsole.devno", NULL, devno);
140
    sysinfo_set_item_val("kconsole.inr", NULL, KCONSOLE_VIRT_INR);
141
 
142
    irq_initialize(&kconsole_irq);
143
    kconsole_irq.devno = devno;
144
    kconsole_irq.inr = KCONSOLE_VIRT_INR;
145
    kconsole_irq.claim = kconsole_claim;
146
    irq_register(&kconsole_irq);
147
 
148
    kconsole_notify = true;
149
}
150
 
151
 
517 jermar 152
/** Register kconsole command.
153
 *
154
 * @param cmd Structure describing the command.
155
 *
156
 * @return 0 on failure, 1 on success.
157
 */
158
int cmd_register(cmd_info_t *cmd)
159
{
160
    link_t *cur;
161
 
162
    spinlock_lock(&cmd_lock);
163
 
164
    /*
165
     * Make sure the command is not already listed.
166
     */
167
    for (cur = cmd_head.next; cur != &cmd_head; cur = cur->next) {
168
        cmd_info_t *hlp;
169
 
170
        hlp = list_get_instance(cur, cmd_info_t, link);
171
 
172
        if (hlp == cmd) {
173
            /* The command is already there. */
174
            spinlock_unlock(&cmd_lock);
175
            return 0;
176
        }
177
 
178
        /* Avoid deadlock. */
179
        if (hlp < cmd) {
180
            spinlock_lock(&hlp->lock);
181
            spinlock_lock(&cmd->lock);
182
        } else {
183
            spinlock_lock(&cmd->lock);
184
            spinlock_lock(&hlp->lock);
185
        }
2108 jermar 186
        if ((strncmp(hlp->name, cmd->name, max(strlen(cmd->name),
187
            strlen(hlp->name))) == 0)) {
517 jermar 188
            /* The command is already there. */
189
            spinlock_unlock(&hlp->lock);
190
            spinlock_unlock(&cmd->lock);
191
            spinlock_unlock(&cmd_lock);
192
            return 0;
193
        }
194
 
195
        spinlock_unlock(&hlp->lock);
196
        spinlock_unlock(&cmd->lock);
197
    }
198
 
199
    /*
200
     * Now the command can be added.
201
     */
202
    list_append(&cmd->link, &cmd_head);
203
 
204
    spinlock_unlock(&cmd_lock);
205
    return 1;
206
}
207
 
635 palkovsky 208
/** Print count times a character */
601 palkovsky 209
static void rdln_print_c(char ch, int count)
210
{
211
    int i;
2108 jermar 212
    for (i = 0; i < count; i++)
601 palkovsky 213
        putchar(ch);
214
}
215
 
635 palkovsky 216
/** Insert character to string */
601 palkovsky 217
static void insert_char(char *str, char ch, int pos)
218
{
219
    int i;
220
 
2108 jermar 221
    for (i = strlen(str); i > pos; i--)
222
        str[i] = str[i - 1];
601 palkovsky 223
    str[pos] = ch;
224
}
225
 
640 jermar 226
/** Try to find a command beginning with prefix */
4055 trochtova 227
static const char *cmdtab_search_one(const char *name,link_t **startpos)
601 palkovsky 228
{
2113 decky 229
    size_t namelen = strlen(name);
601 palkovsky 230
    const char *curname;
231
 
232
    spinlock_lock(&cmd_lock);
233
 
234
    if (!*startpos)
235
        *startpos = cmd_head.next;
236
 
2108 jermar 237
    for (; *startpos != &cmd_head; *startpos = (*startpos)->next) {
601 palkovsky 238
        cmd_info_t *hlp;
239
        hlp = list_get_instance(*startpos, cmd_info_t, link);
240
 
241
        curname = hlp->name;
242
        if (strlen(curname) < namelen)
243
            continue;
244
        if (strncmp(curname, name, namelen) == 0) {
245
            spinlock_unlock(&cmd_lock);
246
            return curname+namelen;
247
        }
248
    }
249
    spinlock_unlock(&cmd_lock);
250
    return NULL;
251
}
252
 
253
 
254
/** Command completion of the commands
255
 *
256
 * @param name - string to match, changed to hint on exit
257
 * @return number of found matches
258
 */
259
static int cmdtab_compl(char *name)
260
{
4055 trochtova 261
    static char output[MAX_SYMBOL_NAME + 1];
601 palkovsky 262
    link_t *startpos = NULL;
263
    const char *foundtxt;
264
    int found = 0;
265
    int i;
266
 
267
    output[0] = '\0';
268
    while ((foundtxt = cmdtab_search_one(name, &startpos))) {
269
        startpos = startpos->next;
270
        if (!found)
4055 trochtova 271
            strncpy(output, foundtxt, strlen(foundtxt) + 1);
601 palkovsky 272
        else {
2108 jermar 273
            for (i = 0; output[i] && foundtxt[i] &&
274
                output[i] == foundtxt[i]; i++)
601 palkovsky 275
                ;
276
            output[i] = '\0';
277
        }
278
        found++;
279
    }
280
    if (!found)
281
        return 0;
282
 
602 palkovsky 283
    if (found > 1 && !strlen(output)) {
601 palkovsky 284
        printf("\n");
285
        startpos = NULL;
286
        while ((foundtxt = cmdtab_search_one(name, &startpos))) {
287
            cmd_info_t *hlp;
288
            hlp = list_get_instance(startpos, cmd_info_t, link);
289
            printf("%s - %s\n", hlp->name, hlp->description);
290
            startpos = startpos->next;
291
        }
292
    }
293
    strncpy(name, output, MAX_SYMBOL_NAME);
294
    return found;
295
 
296
}
297
 
4055 trochtova 298
static char *clever_readline(const char *prompt, chardev_t *input)
601 palkovsky 299
{
300
    static int histposition = 0;
301
 
4055 trochtova 302
    static char tmp[MAX_CMDLINE + 1];
601 palkovsky 303
    int curlen = 0, position = 0;
304
    char *current = history[histposition];
305
    int i;
606 palkovsky 306
    char mod; /* Command Modifier */
601 palkovsky 307
    char c;
308
 
309
    printf("%s> ", prompt);
310
    while (1) {
311
        c = _getc(input);
312
        if (c == '\n') {
313
            putchar(c);
314
            break;
4055 trochtova 315
        }
316
        if (c == '\b') { /* Backspace */
601 palkovsky 317
            if (position == 0)
318
                continue;
2108 jermar 319
            for (i = position; i < curlen; i++)
320
                current[i - 1] = current[i];
601 palkovsky 321
            curlen--;
322
            position--;
323
            putchar('\b');
2108 jermar 324
            for (i = position; i < curlen; i++)
601 palkovsky 325
                putchar(current[i]);
326
            putchar(' ');
2108 jermar 327
            rdln_print_c('\b', curlen - position + 1);
601 palkovsky 328
            continue;
329
        }
607 palkovsky 330
        if (c == '\t') { /* Tabulator */
601 palkovsky 331
            int found;
332
 
333
            /* Move to the end of the word */
2108 jermar 334
            for (; position < curlen && current[position] != ' ';
335
                position++)
601 palkovsky 336
                putchar(current[position]);
337
            /* Copy to tmp last word */
2108 jermar 338
            for (i = position - 1; i >= 0 && current[i] != ' '; i--)
601 palkovsky 339
                ;
340
            /* If word begins with * or &, skip it */
341
            if (tmp[0] == '*' || tmp[0] == '&')
2108 jermar 342
                for (i = 1; tmp[i]; i++)
343
                    tmp[i - 1] = tmp[i];
601 palkovsky 344
            i++; /* I is at the start of the word */
2108 jermar 345
            strncpy(tmp, current + i, position - i + 1);
601 palkovsky 346
 
2108 jermar 347
            if (i == 0) { /* Command completion */
601 palkovsky 348
                found = cmdtab_compl(tmp);
349
            } else { /* Symtab completion */
350
                found = symtab_compl(tmp);
351
            }
352
 
353
            if (found == 0)
354
                continue;
2108 jermar 355
            for (i = 0; tmp[i] && curlen < MAX_CMDLINE;
356
                i++, curlen++)
357
                insert_char(current, tmp[i], i + position);
602 palkovsky 358
 
2108 jermar 359
            if (strlen(tmp) || found == 1) { /* If we have a hint */
360
                for (i = position; i < curlen; i++)
601 palkovsky 361
                    putchar(current[i]);
362
                position += strlen(tmp);
363
                /* Add space to end */
2108 jermar 364
                if (found == 1 && position == curlen &&
602 palkovsky 365
                    curlen < MAX_CMDLINE) {
601 palkovsky 366
                    current[position] = ' ';
367
                    curlen++;
368
                    position++;
369
                    putchar(' ');
370
                }
602 palkovsky 371
            } else { /* No hint, table was printed */
601 palkovsky 372
                printf("%s> ", prompt);
2108 jermar 373
                for (i = 0; i < curlen; i++)
601 palkovsky 374
                    putchar(current[i]);
375
                position += strlen(tmp);
376
            }
2108 jermar 377
            rdln_print_c('\b', curlen - position);
601 palkovsky 378
            continue;
379
        }
607 palkovsky 380
        if (c == 0x1b) { /* Special command */
606 palkovsky 381
            mod = _getc(input);
601 palkovsky 382
            c = _getc(input);
606 palkovsky 383
 
384
            if (mod != 0x5b && mod != 0x4f)
601 palkovsky 385
                continue;
606 palkovsky 386
 
387
            if (c == 0x33 && _getc(input) == 0x7e) {
607 palkovsky 388
                /* Delete */
606 palkovsky 389
                if (position == curlen)
390
                    continue;
2108 jermar 391
                for (i = position + 1; i < curlen; i++) {
606 palkovsky 392
                    putchar(current[i]);
2108 jermar 393
                    current[i - 1] = current[i];
606 palkovsky 394
                }
395
                putchar(' ');
2108 jermar 396
                rdln_print_c('\b', curlen - position);
606 palkovsky 397
                curlen--;
2108 jermar 398
            } else if (c == 0x48) { /* Home */
399
                rdln_print_c('\b', position);
606 palkovsky 400
                position = 0;
2108 jermar 401
            } else if (c == 0x46) {  /* End */
402
                for (i = position; i < curlen; i++)
606 palkovsky 403
                    putchar(current[i]);
404
                position = curlen;
2108 jermar 405
            } else if (c == 0x44) { /* Left */
601 palkovsky 406
                if (position > 0) {
407
                    putchar('\b');
408
                    position--;
409
                }
410
                continue;
2108 jermar 411
            } else if (c == 0x43) { /* Right */
601 palkovsky 412
                if (position < curlen) {
413
                    putchar(current[position]);
414
                    position++;
415
                }
416
                continue;
2108 jermar 417
            } else if (c == 0x41 || c == 0x42) {
418
                                /* Up, down */
419
                rdln_print_c('\b', position);
420
                rdln_print_c(' ', curlen);
421
                rdln_print_c('\b', curlen);
607 palkovsky 422
                if (c == 0x41) /* Up */
601 palkovsky 423
                    histposition--;
424
                else
425
                    histposition++;
2108 jermar 426
                if (histposition < 0) {
427
                    histposition = KCONSOLE_HISTORY - 1;
428
                } else {
429
                    histposition =
430
                        histposition % KCONSOLE_HISTORY;
431
                }
601 palkovsky 432
                current = history[histposition];
433
                printf("%s", current);
434
                curlen = strlen(current);
435
                position = curlen;
436
                continue;
437
            }
438
            continue;
439
        }
440
        if (curlen >= MAX_CMDLINE)
441
            continue;
442
 
443
        insert_char(current, c, position);
444
 
445
        curlen++;
2108 jermar 446
        for (i = position; i < curlen; i++)
601 palkovsky 447
            putchar(current[i]);
448
        position++;
2108 jermar 449
        rdln_print_c('\b',curlen - position);
601 palkovsky 450
    }
603 palkovsky 451
    if (curlen) {
452
        histposition++;
453
        histposition = histposition % KCONSOLE_HISTORY;
454
    }
601 palkovsky 455
    current[curlen] = '\0';
456
    return current;
457
}
458
 
4055 trochtova 459
/** Kernel console prompt.
510 jermar 460
 *
1708 jermar 461
 * @param prompt Kernel console prompt (e.g kconsole/panic).
4055 trochtova 462
 * @param msg    Message to display in the beginning.
463
 * @param kcon   Wait for keypress to show the prompt
464
 *               and never exit.
465
 *
510 jermar 466
 */
4055 trochtova 467
void kconsole(char *prompt, char *msg, bool kcon)
510 jermar 468
{
517 jermar 469
    cmd_info_t *cmd_info;
470
    count_t len;
601 palkovsky 471
    char *cmdline;
510 jermar 472
 
473
    if (!stdin) {
4055 trochtova 474
        LOG("No stdin for kernel console");
510 jermar 475
        return;
476
    }
477
 
4055 trochtova 478
    if (msg)
479
        printf("%s", msg);
480
 
481
    if (kcon)
482
        _getc(stdin);
483
 
510 jermar 484
    while (true) {
2113 decky 485
        cmdline = clever_readline((char *) prompt, stdin);
601 palkovsky 486
        len = strlen(cmdline);
487
        if (!len)
518 jermar 488
            continue;
4055 trochtova 489
 
517 jermar 490
        cmd_info = parse_cmdline(cmdline, len);
518 jermar 491
        if (!cmd_info)
517 jermar 492
            continue;
4055 trochtova 493
 
494
        if ((!kcon)
495
            && (strncmp(cmd_info->name, "exit", min(strlen(cmd_info->name), 5)) == 0))
609 palkovsky 496
            break;
4055 trochtova 497
 
517 jermar 498
        (void) cmd_info->func(cmd_info->argv);
510 jermar 499
    }
500
}
517 jermar 501
 
4055 trochtova 502
/** Kernel console managing thread.
503
 *
504
 */
505
void kconsole_thread(void *data)
506
{
507
    kconsole("kconsole", "Kernel console ready (press any key to activate)\n", true);
508
}
509
 
1780 jermar 510
static int parse_int_arg(char *text, size_t len, unative_t *result)
585 palkovsky 511
{
1972 jermar 512
    static char symname[MAX_SYMBOL_NAME];
1780 jermar 513
    uintptr_t symaddr;
585 palkovsky 514
    bool isaddr = false;
589 palkovsky 515
    bool isptr = false;
585 palkovsky 516
 
517
    /* If we get a name, try to find it in symbol table */
931 palkovsky 518
    if (text[0] == '&') {
519
        isaddr = true;
2108 jermar 520
        text++;
521
        len--;
931 palkovsky 522
    } else if (text[0] == '*') {
523
        isptr = true;
2108 jermar 524
        text++;
525
        len--;
931 palkovsky 526
    }
614 palkovsky 527
    if (text[0] < '0' || text[0] > '9') {
2108 jermar 528
        strncpy(symname, text, min(len + 1, MAX_SYMBOL_NAME));
585 palkovsky 529
        symaddr = get_symbol_addr(symname);
530
        if (!symaddr) {
2108 jermar 531
            printf("Symbol %s not found.\n", symname);
585 palkovsky 532
            return -1;
533
        }
1780 jermar 534
        if (symaddr == (uintptr_t) -1) {
2108 jermar 535
            printf("Duplicate symbol %s.\n", symname);
585 palkovsky 536
            symtab_print_search(symname);
537
            return -1;
538
        }
932 palkovsky 539
        if (isaddr)
1780 jermar 540
            *result = (unative_t)symaddr;
932 palkovsky 541
        else if (isptr)
1780 jermar 542
            *result = **((unative_t **)symaddr);
932 palkovsky 543
        else
1780 jermar 544
            *result = *((unative_t *)symaddr);
932 palkovsky 545
    } else { /* It's a number - convert it */
585 palkovsky 546
        *result = atoi(text);
932 palkovsky 547
        if (isptr)
1780 jermar 548
            *result = *((unative_t *)*result);
932 palkovsky 549
    }
931 palkovsky 550
 
585 palkovsky 551
    return 0;
552
}
553
 
517 jermar 554
/** Parse command line.
555
 *
556
 * @param cmdline Command line as read from input device.
557
 * @param len Command line length.
558
 *
559
 * @return Structure describing the command.
560
 */
561
cmd_info_t *parse_cmdline(char *cmdline, size_t len)
562
{
563
    index_t start = 0, end = 0;
564
    cmd_info_t *cmd = NULL;
565
    link_t *cur;
2113 decky 566
    count_t i;
668 bondari 567
    int error = 0;
517 jermar 568
 
518 jermar 569
    if (!parse_argument(cmdline, len, &start, &end)) {
517 jermar 570
        /* Command line did not contain alphanumeric word. */
571
        return NULL;
572
    }
573
 
574
    spinlock_lock(&cmd_lock);
575
 
576
    for (cur = cmd_head.next; cur != &cmd_head; cur = cur->next) {
577
        cmd_info_t *hlp;
578
 
579
        hlp = list_get_instance(cur, cmd_info_t, link);
580
        spinlock_lock(&hlp->lock);
581
 
635 palkovsky 582
        if (strncmp(hlp->name, &cmdline[start], max(strlen(hlp->name),
2108 jermar 583
            end - start + 1)) == 0) {
517 jermar 584
            cmd = hlp;
585
            break;
586
        }
587
 
588
        spinlock_unlock(&hlp->lock);
589
    }
590
 
591
    spinlock_unlock(&cmd_lock);
592
 
593
    if (!cmd) {
594
        /* Unknown command. */
518 jermar 595
        printf("Unknown command.\n");
517 jermar 596
        return NULL;
597
    }
598
 
599
    /* cmd == hlp is locked */
600
 
601
    /*
602
     * The command line must be further analyzed and
603
     * the parameters therefrom must be matched and
604
     * converted to those specified in the cmd info
605
     * structure.
606
     */
518 jermar 607
 
608
    for (i = 0; i < cmd->argc; i++) {
609
        char *buf;
610
        start = end + 1;
611
        if (!parse_argument(cmdline, len, &start, &end)) {
612
            printf("Too few arguments.\n");
613
            spinlock_unlock(&cmd->lock);
614
            return NULL;
615
        }
616
 
668 bondari 617
        error = 0;
518 jermar 618
        switch (cmd->argv[i].type) {
582 palkovsky 619
        case ARG_TYPE_STRING:
2113 decky 620
            buf = (char *) cmd->argv[i].buffer;
621
            strncpy(buf, (const char *) &cmdline[start],
2108 jermar 622
                min((end - start) + 2, cmd->argv[i].len));
4055 trochtova 623
            buf[min((end - start) + 1, cmd->argv[i].len - 1)] =
624
                '\0';
518 jermar 625
            break;
585 palkovsky 626
        case ARG_TYPE_INT:
2108 jermar 627
            if (parse_int_arg(cmdline + start, end - start + 1,
628
                &cmd->argv[i].intval))
668 bondari 629
                error = 1;
518 jermar 630
            break;
585 palkovsky 631
        case ARG_TYPE_VAR:
2108 jermar 632
            if (start != end && cmdline[start] == '"' &&
633
                cmdline[end] == '"') {
2113 decky 634
                buf = (char *) cmd->argv[i].buffer;
2108 jermar 635
                strncpy(buf, (const char *) &cmdline[start + 1],
636
                    min((end-start), cmd->argv[i].len));
637
                buf[min((end - start), cmd->argv[i].len - 1)] =
638
                    '\0';
1780 jermar 639
                cmd->argv[i].intval = (unative_t) buf;
585 palkovsky 640
                cmd->argv[i].vartype = ARG_TYPE_STRING;
4055 trochtova 641
            } else if (!parse_int_arg(cmdline + start,
642
                end - start + 1, &cmd->argv[i].intval)) {
585 palkovsky 643
                cmd->argv[i].vartype = ARG_TYPE_INT;
2108 jermar 644
            } else {
585 palkovsky 645
                printf("Unrecognized variable argument.\n");
668 bondari 646
                error = 1;
582 palkovsky 647
            }
585 palkovsky 648
            break;
582 palkovsky 649
        case ARG_TYPE_INVALID:
650
        default:
651
            printf("invalid argument type\n");
668 bondari 652
            error = 1;
582 palkovsky 653
            break;
518 jermar 654
        }
655
    }
517 jermar 656
 
668 bondari 657
    if (error) {
658
        spinlock_unlock(&cmd->lock);
659
        return NULL;
660
    }
661
 
518 jermar 662
    start = end + 1;
663
    if (parse_argument(cmdline, len, &start, &end)) {
664
        printf("Too many arguments.\n");
665
        spinlock_unlock(&cmd->lock);
666
        return NULL;
667
    }
668
 
517 jermar 669
    spinlock_unlock(&cmd->lock);
670
    return cmd;
671
}
672
 
518 jermar 673
/** Parse argument.
674
 *
675
 * Find start and end positions of command line argument.
676
 *
677
 * @param cmdline Command line as read from the input device.
678
 * @param len Number of characters in cmdline.
679
 * @param start On entry, 'start' contains pointer to the index
680
 *        of first unprocessed character of cmdline.
681
 *        On successful exit, it marks beginning of the next argument.
682
 * @param end Undefined on entry. On exit, 'end' points to the last character
683
 *        of the next argument.
684
 *
685
 * @return false on failure, true on success.
686
 */
687
bool parse_argument(char *cmdline, size_t len, index_t *start, index_t *end)
688
{
2113 decky 689
    index_t i;
518 jermar 690
    bool found_start = false;
691
 
692
    ASSERT(start != NULL);
693
    ASSERT(end != NULL);
694
 
695
    for (i = *start; i < len; i++) {
696
        if (!found_start) {
2572 jermar 697
            if (isspace(cmdline[i]))
518 jermar 698
                (*start)++;
699
            else
700
                found_start = true;
701
        } else {
2572 jermar 702
            if (isspace(cmdline[i]))
518 jermar 703
                break;
704
        }
705
    }
706
    *end = i - 1;
707
 
708
    return found_start;
709
}
1702 cejka 710
 
1888 jermar 711
/** @}
1702 cejka 712
 */