WebSVN – HelenOS – Diff – /trunk/kernel/generic/src/console/kconsole.c


/*
 * Copyright (c) 2005 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
/** @addtogroup genericconsole
 * @{
 */
 
/**
 * @file    kconsole.c
 * @brief   Kernel console.
 *
 * This file contains kernel thread managing the kernel console.
 */
 
#include <console/kconsole.h>
#include <console/console.h>
#include <console/chardev.h>
#include <console/cmd.h>
#include <print.h>
#include <panic.h>
#include <arch/types.h>
#include <adt/list.h>
#include <arch.h>
#include <macros.h>
#include <debug.h>
#include <func.h>
#include <string.h>
#include <macros.h>
#include <sysinfo/sysinfo.h>
#include <ddi/device.h>
 
 
#include <symtab.h>
#include <errno.h>
 
/** Simple kernel console.
 *
 * The console is realized by kernel thread kconsole.
 * It doesn't understand any useful command on its own,
 * but makes it possible for other kernel subsystems to
 * register their own commands.
 */
 
/** Locking.
 *
 * There is a list of cmd_info_t structures. This list
 * is protected by cmd_lock spinlock. Note that specially
 * the link elements of cmd_info_t are protected by
 * this lock.
 *
 * Each cmd_info_t also has its own lock, which protects
 * all elements thereof except the link element.
 *
 * cmd_lock must be acquired before any cmd_info lock.
 * When locking two cmd info structures, structure with
 * lower address must be locked first.
 */
 
SPINLOCK_INITIALIZE(cmd_lock);  /**< Lock protecting command list. */
LIST_INITIALIZE(cmd_head);  /**< Command list. */
 
static cmd_info_t *parse_cmdline(char *cmdline, size_t len);
static bool parse_argument(char *cmdline, size_t len, index_t *start,
    index_t *end);
static char history[KCONSOLE_HISTORY][MAX_CMDLINE] = {};
 
/*
 * For now, we use 0 as INR.
 * However, it is therefore desirable to have architecture specific
 * definition of KCONSOLE_VIRT_INR in the future.
 */
#define KCONSOLE_VIRT_INR  0
 
bool kconsole_notify = false;
irq_t kconsole_irq;
 
 
/** Allways refuse IRQ ownership.
 *
 * This is not a real IRQ, so we always decline.
 *
 * @return Always returns IRQ_DECLINE.
 *
 */
static irq_ownership_t kconsole_claim(irq_t *irq)
{
    return IRQ_DECLINE;
}
 
 
/** Initialize kconsole data structures
 *
 * This is the most basic initialization, almost no
 * other kernel subsystem is ready yet.
 *
 */
void kconsole_init(void)
{
    unsigned int i;
 
    cmd_init();
    for (i = 0; i < KCONSOLE_HISTORY; i++)
        history[i][0] = '\0';
}
 
 
/** Initialize kconsole notification mechanism
 *
 * Initialize the virtual IRQ notification mechanism.
 *
 */
void kconsole_notify_init(void)
{
    devno_t devno = device_assign_devno();
   
    sysinfo_set_item_val("kconsole.present", NULL, true);
    sysinfo_set_item_val("kconsole.devno", NULL, devno);
    sysinfo_set_item_val("kconsole.inr", NULL, KCONSOLE_VIRT_INR);
   
    irq_initialize(&kconsole_irq);
    kconsole_irq.devno = devno;
    kconsole_irq.inr = KCONSOLE_VIRT_INR;
    kconsole_irq.claim = kconsole_claim;
    irq_register(&kconsole_irq);
   
    kconsole_notify = true;
}
 
 
/** Register kconsole command.
 *
 * @param cmd Structure describing the command.
 *
 * @return 0 on failure, 1 on success.
 */
int cmd_register(cmd_info_t *cmd)
{
    link_t *cur;
   
    spinlock_lock(&cmd_lock);
   
    /*
     * Make sure the command is not already listed.
     */
    for (cur = cmd_head.next; cur != &cmd_head; cur = cur->next) {
        cmd_info_t *hlp;
       
        hlp = list_get_instance(cur, cmd_info_t, link);
 
        if (hlp == cmd) {
            /* The command is already there. */
            spinlock_unlock(&cmd_lock);
            return 0;
        }
 
        /* Avoid deadlock. */
        if (hlp < cmd) {
            spinlock_lock(&hlp->lock);
            spinlock_lock(&cmd->lock);
        } else {
            spinlock_lock(&cmd->lock);
            spinlock_lock(&hlp->lock);
        }
        if ((strncmp(hlp->name, cmd->name, max(strlen(cmd->name),
            strlen(hlp->name))) == 0)) {
            /* The command is already there. */
            spinlock_unlock(&hlp->lock);
            spinlock_unlock(&cmd->lock);
            spinlock_unlock(&cmd_lock);
            return 0;
        }
       
        spinlock_unlock(&hlp->lock);
        spinlock_unlock(&cmd->lock);
    }
   
    /*
     * Now the command can be added.
     */
    list_append(&cmd->link, &cmd_head);
   
    spinlock_unlock(&cmd_lock);
    return 1;
}
 
/** Print count times a character */
static void rdln_print_c(char ch, int count)
{
    int i;
    for (i = 0; i < count; i++)
        putchar(ch);
}
 
/** Insert character to string */
static void insert_char(char *str, char ch, int pos)
{
    int i;
   
    for (i = strlen(str); i > pos; i--)
        str[i] = str[i - 1];
    str[pos] = ch;
}
 
/** Try to find a command beginning with prefix */
static const char *cmdtab_search_one(const char *name,link_t **startpos)
{
    size_t namelen = strlen(name);
    const char *curname;
 
    spinlock_lock(&cmd_lock);
 
    if (!*startpos)
        *startpos = cmd_head.next;
 
    for (; *startpos != &cmd_head; *startpos = (*startpos)->next) {
        cmd_info_t *hlp;
        hlp = list_get_instance(*startpos, cmd_info_t, link);
 
        curname = hlp->name;
        if (strlen(curname) < namelen)
            continue;
        if (strncmp(curname, name, namelen) == 0) {
            spinlock_unlock(&cmd_lock);
            return curname+namelen;
        }
    }
    spinlock_unlock(&cmd_lock);
    return NULL;
}
 
 
/** Command completion of the commands
 *
 * @param name - string to match, changed to hint on exit
 * @return number of found matches
 */
static int cmdtab_compl(char *name)
{
    static char output[/*MAX_SYMBOL_NAME*/128 + 1];
    link_t *startpos = NULL;
    const char *foundtxt;
    int found = 0;
    int i;
 
    output[0] = '\0';
    while ((foundtxt = cmdtab_search_one(name, &startpos))) {
        startpos = startpos->next;
        if (!found)
            strncpy(output, foundtxt, strlen(foundtxt) + 1);
        else {
            for (i = 0; output[i] && foundtxt[i] &&
                output[i] == foundtxt[i]; i++)
                ;
            output[i] = '\0';
        }
        found++;
    }
    if (!found)
        return 0;
 
    if (found > 1 && !strlen(output)) {
        printf("\n");
        startpos = NULL;
        while ((foundtxt = cmdtab_search_one(name, &startpos))) {
            cmd_info_t *hlp;
            hlp = list_get_instance(startpos, cmd_info_t, link);
            printf("%s - %s\n", hlp->name, hlp->description);
            startpos = startpos->next;
        }
    }
    strncpy(name, output, 128/*MAX_SYMBOL_NAME*/);
    return found;
}
 
static char *clever_readline(const char *prompt, indev_t *input)
{
    static int histposition = 0;
 
    static char tmp[MAX_CMDLINE + 1];
    int curlen = 0, position = 0;
    char *current = history[histposition];
    int i;
    char mod; /* Command Modifier */
    char c;
 
    printf("%s> ", prompt);
    while (1) {
        c = _getc(input);
        if (c == '\n') {
            putchar(c);
            break;
        }
        if (c == '\b') { /* Backspace */
            if (position == 0)
                continue;
            for (i = position; i < curlen; i++)
                current[i - 1] = current[i];
            curlen--;
            position--;
            putchar('\b');
            for (i = position; i < curlen; i++)
                putchar(current[i]);
            putchar(' ');
            rdln_print_c('\b', curlen - position + 1);
            continue;
        }
        if (c == '\t') { /* Tabulator */
            int found;
 
            /* Move to the end of the word */
            for (; position < curlen && current[position] != ' ';
                position++)
                putchar(current[position]);
            /* Copy to tmp last word */
            for (i = position - 1; i >= 0 && current[i] != ' '; i--)
                ;
            /* If word begins with * or &, skip it */
            if (tmp[0] == '*' || tmp[0] == '&')
                for (i = 1; tmp[i]; i++)
                    tmp[i - 1] = tmp[i];
            i++; /* I is at the start of the word */
            strncpy(tmp, current + i, position - i + 1);
 
            if (i == 0) { /* Command completion */
                found = cmdtab_compl(tmp);
            } else { /* Symtab completion */
 
                found = symtab_compl(tmp);
 
 
 
            }
 
            if (found == 0)
                continue;
            for (i = 0; tmp[i] && curlen < MAX_CMDLINE;
                i++, curlen++)
                insert_char(current, tmp[i], i + position);
 
            if (strlen(tmp) || found == 1) { /* If we have a hint */
                for (i = position; i < curlen; i++)
                    putchar(current[i]);
                position += strlen(tmp);
                /* Add space to end */
                if (found == 1 && position == curlen &&
                    curlen < MAX_CMDLINE) {
                    current[position] = ' ';
                    curlen++;
                    position++;
                    putchar(' ');
                }
            } else { /* No hint, table was printed */
                printf("%s> ", prompt);
                for (i = 0; i < curlen; i++)
                    putchar(current[i]);
                position += strlen(tmp);
            }
            rdln_print_c('\b', curlen - position);
            continue;
        }
        if (c == 0x1b) { /* Special command */
            mod = _getc(input);
            c = _getc(input);
 
            if (mod != 0x5b && mod != 0x4f)
                continue;
 
            if (c == 0x33 && _getc(input) == 0x7e) {
                /* Delete */
                if (position == curlen)
                    continue;
                for (i = position + 1; i < curlen; i++) {
                    putchar(current[i]);
                    current[i - 1] = current[i];
                }
                putchar(' ');
                rdln_print_c('\b', curlen - position);
                curlen--;
            } else if (c == 0x48) { /* Home */
                rdln_print_c('\b', position);
                position = 0;
            } else if (c == 0x46) {  /* End */
                for (i = position; i < curlen; i++)
                    putchar(current[i]);
                position = curlen;
            } else if (c == 0x44) { /* Left */
                if (position > 0) {
                    putchar('\b');
                    position--;
                }
                continue;
            } else if (c == 0x43) { /* Right */
                if (position < curlen) {
                    putchar(current[position]);
                    position++;
                }
                continue;
            } else if (c == 0x41 || c == 0x42) {
                                /* Up, down */
                rdln_print_c('\b', position);
                rdln_print_c(' ', curlen);
                rdln_print_c('\b', curlen);
                if (c == 0x41) /* Up */
                    histposition--;
                else
                    histposition++;
                if (histposition < 0) {
                    histposition = KCONSOLE_HISTORY - 1;
                } else {
                    histposition =
                        histposition % KCONSOLE_HISTORY;
                }
                current = history[histposition];
                printf("%s", current);
                curlen = strlen(current);
                position = curlen;
                continue;
            }
            continue;
        }
        if (curlen >= MAX_CMDLINE)
            continue;
 
        insert_char(current, c, position);
 
        curlen++;
        for (i = position; i < curlen; i++)
            putchar(current[i]);
        position++;
        rdln_print_c('\b',curlen - position);
    }
    if (curlen) {
        histposition++;
        histposition = histposition % KCONSOLE_HISTORY;
    }
    current[curlen] = '\0';
    return current;
}
 
bool kconsole_check_poll(void)
{
    return check_poll(stdin);
}
 
/** Kernel console prompt.
 *
 * @param prompt Kernel console prompt (e.g kconsole/panic).
 * @param msg    Message to display in the beginning.
 * @param kcon   Wait for keypress to show the prompt
 *               and never exit.
 *
 */
void kconsole(char *prompt, char *msg, bool kcon)
{
    cmd_info_t *cmd_info;
    count_t len;
    char *cmdline;
   
    if (!stdin) {
        LOG("No stdin for kernel console");
        return;
    }
   
    if (msg)
        printf("%s", msg);
   
    if (kcon)
        _getc(stdin);
    else
        printf("Type \"exit\" to leave the console.\n");
   
    while (true) {
        cmdline = clever_readline((char *) prompt, stdin);
        len = strlen(cmdline);
        if (!len)
            continue;
       
        if ((!kcon) && (len == 4) && (strncmp(cmdline, "exit", 4) == 0))
            break;
       
        cmd_info = parse_cmdline(cmdline, len);
        if (!cmd_info)
            continue;
       
        (void) cmd_info->func(cmd_info->argv);
    }
}
 
/** Kernel console managing thread.
 *
 */
void kconsole_thread(void *data)
{
    kconsole("kconsole", "Kernel console ready (press any key to activate)\n", true);
}
 
static int parse_int_arg(char *text, size_t len, unative_t *result)
{
    uintptr_t symaddr;
    bool isaddr = false;
    bool isptr = false;
    int rc;
 
 
    static char symname[MAX_SYMBOL_NAME];
 
   
    /* If we get a name, try to find it in symbol table */
    if (text[0] == '&') {
        isaddr = true;
        text++;
        len--;
    } else if (text[0] == '*') {
        isptr = true;
        text++;
        len--;
    }
    if (text[0] < '0' || text[0] > '9') {
 
        strncpy(symname, text, min(len + 1, MAX_SYMBOL_NAME));
        rc = symtab_addr_lookup(symname, &symaddr);
        switch (rc) {
        case ENOENT:
            printf("Symbol %s not found.\n", symname);
            return -1;
 
        case EOVERFLOW:
            printf("Duplicate symbol %s.\n", symname);
            symtab_print_search(symname);
            return -1;
        default:
            printf("No symbol information available.\n");
            return -1;
        }
 
 
 
        if (isaddr)
            *result = (unative_t)symaddr;
        else if (isptr)
            *result = **((unative_t **)symaddr);
        else
            *result = *((unative_t *)symaddr);
    } else { /* It's a number - convert it */
        *result = atoi(text);
        if (isptr)
            *result = *((unative_t *)*result);
    }
 
    return 0;
}
 
/** Parse command line.
 *
 * @param cmdline Command line as read from input device.
 * @param len Command line length.
 *
 * @return Structure describing the command.
 */
cmd_info_t *parse_cmdline(char *cmdline, size_t len)
{
    index_t start = 0, end = 0;
    cmd_info_t *cmd = NULL;
    link_t *cur;
    count_t i;
    int error = 0;
   
    if (!parse_argument(cmdline, len, &start, &end)) {
        /* Command line did not contain alphanumeric word. */
        return NULL;
    }
 
    spinlock_lock(&cmd_lock);
   
    for (cur = cmd_head.next; cur != &cmd_head; cur = cur->next) {
        cmd_info_t *hlp;
       
        hlp = list_get_instance(cur, cmd_info_t, link);
        spinlock_lock(&hlp->lock);
       
        if (strncmp(hlp->name, &cmdline[start], max(strlen(hlp->name),
            end - start + 1)) == 0) {
            cmd = hlp;
            break;
        }
       
        spinlock_unlock(&hlp->lock);
    }
   
    spinlock_unlock(&cmd_lock);
   
    if (!cmd) {
        /* Unknown command. */
        printf("Unknown command.\n");
        return NULL;
    }
 
    /* cmd == hlp is locked */
   
    /*
     * The command line must be further analyzed and
     * the parameters therefrom must be matched and
     * converted to those specified in the cmd info
     * structure.
     */
 
    for (i = 0; i < cmd->argc; i++) {
        char *buf;
        start = end + 1;
        if (!parse_argument(cmdline, len, &start, &end)) {
            printf("Too few arguments.\n");
            spinlock_unlock(&cmd->lock);
            return NULL;
        }
       
        error = 0;
        switch (cmd->argv[i].type) {
        case ARG_TYPE_STRING:
            buf = (char *) cmd->argv[i].buffer;
            strncpy(buf, (const char *) &cmdline[start],
                min((end - start) + 2, cmd->argv[i].len));
            buf[min((end - start) + 1, cmd->argv[i].len - 1)] =
                '\0';
            break;
        case ARG_TYPE_INT:
            if (parse_int_arg(cmdline + start, end - start + 1,
                &cmd->argv[i].intval))
                error = 1;
            break;
        case ARG_TYPE_VAR:
            if (start != end && cmdline[start] == '"' &&
                cmdline[end] == '"') {
                buf = (char *) cmd->argv[i].buffer;
                strncpy(buf, (const char *) &cmdline[start + 1],
                    min((end-start), cmd->argv[i].len));
                buf[min((end - start), cmd->argv[i].len - 1)] =
                    '\0';
                cmd->argv[i].intval = (unative_t) buf;
                cmd->argv[i].vartype = ARG_TYPE_STRING;
            } else if (!parse_int_arg(cmdline + start,
                end - start + 1, &cmd->argv[i].intval)) {
                cmd->argv[i].vartype = ARG_TYPE_INT;
            } else {
                printf("Unrecognized variable argument.\n");
                error = 1;
            }
            break;
        case ARG_TYPE_INVALID:
        default:
            printf("invalid argument type\n");
            error = 1;
            break;
        }
    }
   
    if (error) {
        spinlock_unlock(&cmd->lock);
        return NULL;
    }
   
    start = end + 1;
    if (parse_argument(cmdline, len, &start, &end)) {
        printf("Too many arguments.\n");
        spinlock_unlock(&cmd->lock);
        return NULL;
    }
   
    spinlock_unlock(&cmd->lock);
    return cmd;
}
 
/** Parse argument.
 *
 * Find start and end positions of command line argument.
 *
 * @param cmdline Command line as read from the input device.
 * @param len Number of characters in cmdline.
 * @param start On entry, 'start' contains pointer to the index
 *        of first unprocessed character of cmdline.
 *        On successful exit, it marks beginning of the next argument.
 * @param end Undefined on entry. On exit, 'end' points to the last character
 *        of the next argument.
 *
 * @return false on failure, true on success.
 */
bool parse_argument(char *cmdline, size_t len, index_t *start, index_t *end)
{
    index_t i;
    bool found_start = false;
   
    ASSERT(start != NULL);
    ASSERT(end != NULL);
   
    for (i = *start; i < len; i++) {
        if (!found_start) {
            if (isspace(cmdline[i]))
                (*start)++;
            else
                found_start = true;
        } else {
            if (isspace(cmdline[i]))
                break;
        }
    }
    *end = i - 1;
 
    return found_start;
}
 
/** @}
 */
 

Rev 4132	Rev 4137
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		-
57	#ifdef CONFIG_SYMTAB	-
58	#include <symtab.h>	56	#include <symtab.h>
59	#endif	57	#include <errno.h>
60		58
61	/** Simple kernel console.	59	/** Simple kernel console.
62	*	60	*
63	* The console is realized by kernel thread kconsole.	61	* The console is realized by kernel thread kconsole.
64	* It doesn't understand any useful command on its own,	62	* It doesn't understand any useful command on its own,
65	* but makes it possible for other kernel subsystems to	63	* but makes it possible for other kernel subsystems to
66	* register their own commands.	64	* register their own commands.
67	*/	65	*/
68		66
69	/** Locking.	67	/** Locking.
70	*	68	*
71	* There is a list of cmd_info_t structures. This list	69	* There is a list of cmd_info_t structures. This list
72	* is protected by cmd_lock spinlock. Note that specially	70	* is protected by cmd_lock spinlock. Note that specially
73	* the link elements of cmd_info_t are protected by	71	* the link elements of cmd_info_t are protected by
74	* this lock.	72	* this lock.
75	*	73	*
76	* Each cmd_info_t also has its own lock, which protects	74	* Each cmd_info_t also has its own lock, which protects
77	* all elements thereof except the link element.	75	* all elements thereof except the link element.
78	*	76	*
79	* cmd_lock must be acquired before any cmd_info lock.	77	* cmd_lock must be acquired before any cmd_info lock.
80	* When locking two cmd info structures, structure with	78	* When locking two cmd info structures, structure with
81	* lower address must be locked first.	79	* lower address must be locked first.
82	*/	80	*/
83		81
84	SPINLOCK_INITIALIZE(cmd_lock); /*< Lock protecting command list. /	82	SPINLOCK_INITIALIZE(cmd_lock); /*< Lock protecting command list. /
85	LIST_INITIALIZE(cmd_head); /*< Command list. /	83	LIST_INITIALIZE(cmd_head); /*< Command list. /
86		84
87	static cmd_info_t parse_cmdline(char cmdline, size_t len);	85	static cmd_info_t parse_cmdline(char cmdline, size_t len);
88	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,
89	index_t *end);	87	index_t *end);
90	static char history[KCONSOLE_HISTORY][MAX_CMDLINE] = {};	88	static char history[KCONSOLE_HISTORY][MAX_CMDLINE] = {};
91		89
92	/*	90	/*
93	* For now, we use 0 as INR.	91	* For now, we use 0 as INR.
94	* However, it is therefore desirable to have architecture specific	92	* However, it is therefore desirable to have architecture specific
95	* definition of KCONSOLE_VIRT_INR in the future.	93	* definition of KCONSOLE_VIRT_INR in the future.
96	*/	94	*/
97	#define KCONSOLE_VIRT_INR 0	95	#define KCONSOLE_VIRT_INR 0
98		96
99	bool kconsole_notify = false;	97	bool kconsole_notify = false;
100	irq_t kconsole_irq;	98	irq_t kconsole_irq;
101		99
102		100
103	/** Allways refuse IRQ ownership.	101	/** Allways refuse IRQ ownership.
104	*	102	*
105	* This is not a real IRQ, so we always decline.	103	* This is not a real IRQ, so we always decline.
106	*	104	*
107	* @return Always returns IRQ_DECLINE.	105	* @return Always returns IRQ_DECLINE.
108	*	106	*
109	*/	107	*/
110	static irq_ownership_t kconsole_claim(irq_t *irq)	108	static irq_ownership_t kconsole_claim(irq_t *irq)
111	{	109	{
112	return IRQ_DECLINE;	110	return IRQ_DECLINE;
113	}	111	}
114		112
115		113
116	/** Initialize kconsole data structures	114	/** Initialize kconsole data structures
117	*	115	*
118	* This is the most basic initialization, almost no	116	* This is the most basic initialization, almost no
119	* other kernel subsystem is ready yet.	117	* other kernel subsystem is ready yet.
120	*	118	*
121	*/	119	*/
122	void kconsole_init(void)	120	void kconsole_init(void)
123	{	121	{
124	unsigned int i;	122	unsigned int i;
125		123
126	cmd_init();	124	cmd_init();
127	for (i = 0; i < KCONSOLE_HISTORY; i++)	125	for (i = 0; i < KCONSOLE_HISTORY; i++)
128	history[i][0] = '\0';	126	history[i][0] = '\0';
129	}	127	}
130		128
131		129
132	/** Initialize kconsole notification mechanism	130	/** Initialize kconsole notification mechanism
133	*	131	*
134	* Initialize the virtual IRQ notification mechanism.	132	* Initialize the virtual IRQ notification mechanism.
135	*	133	*
136	*/	134	*/
137	void kconsole_notify_init(void)	135	void kconsole_notify_init(void)
138	{	136	{
139	devno_t devno = device_assign_devno();	137	devno_t devno = device_assign_devno();
140		138
141	sysinfo_set_item_val("kconsole.present", NULL, true);	139	sysinfo_set_item_val("kconsole.present", NULL, true);
142	sysinfo_set_item_val("kconsole.devno", NULL, devno);	140	sysinfo_set_item_val("kconsole.devno", NULL, devno);
143	sysinfo_set_item_val("kconsole.inr", NULL, KCONSOLE_VIRT_INR);	141	sysinfo_set_item_val("kconsole.inr", NULL, KCONSOLE_VIRT_INR);
144		142
145	irq_initialize(&kconsole_irq);	143	irq_initialize(&kconsole_irq);
146	kconsole_irq.devno = devno;	144	kconsole_irq.devno = devno;
147	kconsole_irq.inr = KCONSOLE_VIRT_INR;	145	kconsole_irq.inr = KCONSOLE_VIRT_INR;
148	kconsole_irq.claim = kconsole_claim;	146	kconsole_irq.claim = kconsole_claim;
149	irq_register(&kconsole_irq);	147	irq_register(&kconsole_irq);
150		148
151	kconsole_notify = true;	149	kconsole_notify = true;
152	}	150	}
153		151
154		152
155	/** Register kconsole command.	153	/** Register kconsole command.
156	*	154	*
157	* @param cmd Structure describing the command.	155	* @param cmd Structure describing the command.
158	*	156	*
159	* @return 0 on failure, 1 on success.	157	* @return 0 on failure, 1 on success.
160	*/	158	*/
161	int cmd_register(cmd_info_t *cmd)	159	int cmd_register(cmd_info_t *cmd)
162	{	160	{
163	link_t *cur;	161	link_t *cur;
164		162
165	spinlock_lock(&cmd_lock);	163	spinlock_lock(&cmd_lock);
166		164
167	/*	165	/*
168	* Make sure the command is not already listed.	166	* Make sure the command is not already listed.
169	*/	167	*/
170	for (cur = cmd_head.next; cur != &cmd_head; cur = cur->next) {	168	for (cur = cmd_head.next; cur != &cmd_head; cur = cur->next) {
171	cmd_info_t *hlp;	169	cmd_info_t *hlp;
172		170
173	hlp = list_get_instance(cur, cmd_info_t, link);	171	hlp = list_get_instance(cur, cmd_info_t, link);
174		172
175	if (hlp == cmd) {	173	if (hlp == cmd) {
176	/* The command is already there. */	174	/* The command is already there. */
177	spinlock_unlock(&cmd_lock);	175	spinlock_unlock(&cmd_lock);
178	return 0;	176	return 0;
179	}	177	}
180		178
181	/* Avoid deadlock. */	179	/* Avoid deadlock. */
182	if (hlp < cmd) {	180	if (hlp < cmd) {
183	spinlock_lock(&hlp->lock);	181	spinlock_lock(&hlp->lock);
184	spinlock_lock(&cmd->lock);	182	spinlock_lock(&cmd->lock);
185	} else {	183	} else {
186	spinlock_lock(&cmd->lock);	184	spinlock_lock(&cmd->lock);
187	spinlock_lock(&hlp->lock);	185	spinlock_lock(&hlp->lock);
188	}	186	}
189	if ((strncmp(hlp->name, cmd->name, max(strlen(cmd->name),	187	if ((strncmp(hlp->name, cmd->name, max(strlen(cmd->name),
190	strlen(hlp->name))) == 0)) {	188	strlen(hlp->name))) == 0)) {
191	/* The command is already there. */	189	/* The command is already there. */
192	spinlock_unlock(&hlp->lock);	190	spinlock_unlock(&hlp->lock);
193	spinlock_unlock(&cmd->lock);	191	spinlock_unlock(&cmd->lock);
194	spinlock_unlock(&cmd_lock);	192	spinlock_unlock(&cmd_lock);
195	return 0;	193	return 0;
196	}	194	}
197		195
198	spinlock_unlock(&hlp->lock);	196	spinlock_unlock(&hlp->lock);
199	spinlock_unlock(&cmd->lock);	197	spinlock_unlock(&cmd->lock);
200	}	198	}
201		199
202	/*	200	/*
203	* Now the command can be added.	201	* Now the command can be added.
204	*/	202	*/
205	list_append(&cmd->link, &cmd_head);	203	list_append(&cmd->link, &cmd_head);
206		204
207	spinlock_unlock(&cmd_lock);	205	spinlock_unlock(&cmd_lock);
208	return 1;	206	return 1;
209	}	207	}
210		208
211	/** Print count times a character */	209	/** Print count times a character */
212	static void rdln_print_c(char ch, int count)	210	static void rdln_print_c(char ch, int count)
213	{	211	{
214	int i;	212	int i;
215	for (i = 0; i < count; i++)	213	for (i = 0; i < count; i++)
216	putchar(ch);	214	putchar(ch);
217	}	215	}
218		216
219	/** Insert character to string */	217	/** Insert character to string */
220	static void insert_char(char *str, char ch, int pos)	218	static void insert_char(char *str, char ch, int pos)
221	{	219	{
222	int i;	220	int i;
223		221
224	for (i = strlen(str); i > pos; i--)	222	for (i = strlen(str); i > pos; i--)
225	str[i] = str[i - 1];	223	str[i] = str[i - 1];
226	str[pos] = ch;	224	str[pos] = ch;
227	}	225	}
228		226
229	/** Try to find a command beginning with prefix */	227	/** Try to find a command beginning with prefix */
230	static const char cmdtab_search_one(const char name,link_t **startpos)	228	static const char cmdtab_search_one(const char name,link_t **startpos)
231	{	229	{
232	size_t namelen = strlen(name);	230	size_t namelen = strlen(name);
233	const char *curname;	231	const char *curname;
234		232
235	spinlock_lock(&cmd_lock);	233	spinlock_lock(&cmd_lock);
236		234
237	if (!*startpos)	235	if (!*startpos)
238	*startpos = cmd_head.next;	236	*startpos = cmd_head.next;
239		237
240	for (; startpos != &cmd_head; startpos = (*startpos)->next) {	238	for (; startpos != &cmd_head; startpos = (*startpos)->next) {
241	cmd_info_t *hlp;	239	cmd_info_t *hlp;
242	hlp = list_get_instance(*startpos, cmd_info_t, link);	240	hlp = list_get_instance(*startpos, cmd_info_t, link);
243		241
244	curname = hlp->name;	242	curname = hlp->name;
245	if (strlen(curname) < namelen)	243	if (strlen(curname) < namelen)
246	continue;	244	continue;
247	if (strncmp(curname, name, namelen) == 0) {	245	if (strncmp(curname, name, namelen) == 0) {
248	spinlock_unlock(&cmd_lock);	246	spinlock_unlock(&cmd_lock);
249	return curname+namelen;	247	return curname+namelen;
250	}	248	}
251	}	249	}
252	spinlock_unlock(&cmd_lock);	250	spinlock_unlock(&cmd_lock);
253	return NULL;	251	return NULL;
254	}	252	}
255		253
256		254
257	/** Command completion of the commands	255	/** Command completion of the commands
258	*	256	*
259	* @param name - string to match, changed to hint on exit	257	* @param name - string to match, changed to hint on exit
260	* @return number of found matches	258	* @return number of found matches
261	*/	259	*/
262	static int cmdtab_compl(char *name)	260	static int cmdtab_compl(char *name)
263	{	261	{
264	static char output[/MAX_SYMBOL_NAME/128 + 1];	262	static char output[/MAX_SYMBOL_NAME/128 + 1];
265	link_t *startpos = NULL;	263	link_t *startpos = NULL;
266	const char *foundtxt;	264	const char *foundtxt;
267	int found = 0;	265	int found = 0;
268	int i;	266	int i;
269		267
270	output[0] = '\0';	268	output[0] = '\0';
271	while ((foundtxt = cmdtab_search_one(name, &startpos))) {	269	while ((foundtxt = cmdtab_search_one(name, &startpos))) {
272	startpos = startpos->next;	270	startpos = startpos->next;
273	if (!found)	271	if (!found)
274	strncpy(output, foundtxt, strlen(foundtxt) + 1);	272	strncpy(output, foundtxt, strlen(foundtxt) + 1);
275	else {	273	else {
276	for (i = 0; output[i] && foundtxt[i] &&	274	for (i = 0; output[i] && foundtxt[i] &&
277	output[i] == foundtxt[i]; i++)	275	output[i] == foundtxt[i]; i++)
278	;	276	;
279	output[i] = '\0';	277	output[i] = '\0';
280	}	278	}
281	found++;	279	found++;
282	}	280	}
283	if (!found)	281	if (!found)
284	return 0;	282	return 0;
285		283
286	if (found > 1 && !strlen(output)) {	284	if (found > 1 && !strlen(output)) {
287	printf("\n");	285	printf("\n");
288	startpos = NULL;	286	startpos = NULL;
289	while ((foundtxt = cmdtab_search_one(name, &startpos))) {	287	while ((foundtxt = cmdtab_search_one(name, &startpos))) {
290	cmd_info_t *hlp;	288	cmd_info_t *hlp;
291	hlp = list_get_instance(startpos, cmd_info_t, link);	289	hlp = list_get_instance(startpos, cmd_info_t, link);
292	printf("%s - %s\n", hlp->name, hlp->description);	290	printf("%s - %s\n", hlp->name, hlp->description);
293	startpos = startpos->next;	291	startpos = startpos->next;
294	}	292	}
295	}	293	}
296	strncpy(name, output, 128/MAX_SYMBOL_NAME/);	294	strncpy(name, output, 128/MAX_SYMBOL_NAME/);
297	return found;	295	return found;
298	}	296	}
299		297
300	static char clever_readline(const char prompt, indev_t *input)	298	static char clever_readline(const char prompt, indev_t *input)
301	{	299	{
302	static int histposition = 0;	300	static int histposition = 0;
303		301
304	static char tmp[MAX_CMDLINE + 1];	302	static char tmp[MAX_CMDLINE + 1];
305	int curlen = 0, position = 0;	303	int curlen = 0, position = 0;
306	char *current = history[histposition];	304	char *current = history[histposition];
307	int i;	305	int i;
308	char mod; /* Command Modifier */	306	char mod; /* Command Modifier */
309	char c;	307	char c;
310		308
311	printf("%s> ", prompt);	309	printf("%s> ", prompt);
312	while (1) {	310	while (1) {
313	c = _getc(input);	311	c = _getc(input);
314	if (c == '\n') {	312	if (c == '\n') {
315	putchar(c);	313	putchar(c);
316	break;	314	break;
317	}	315	}
318	if (c == '\b') { /* Backspace */	316	if (c == '\b') { /* Backspace */
319	if (position == 0)	317	if (position == 0)
320	continue;	318	continue;
321	for (i = position; i < curlen; i++)	319	for (i = position; i < curlen; i++)
322	current[i - 1] = current[i];	320	current[i - 1] = current[i];
323	curlen--;	321	curlen--;
324	position--;	322	position--;
325	putchar('\b');	323	putchar('\b');
326	for (i = position; i < curlen; i++)	324	for (i = position; i < curlen; i++)
327	putchar(current[i]);	325	putchar(current[i]);
328	putchar(' ');	326	putchar(' ');
329	rdln_print_c('\b', curlen - position + 1);	327	rdln_print_c('\b', curlen - position + 1);
330	continue;	328	continue;
331	}	329	}
332	if (c == '\t') { /* Tabulator */	330	if (c == '\t') { /* Tabulator */
333	int found;	331	int found;
334		332
335	/* Move to the end of the word */	333	/* Move to the end of the word */
336	for (; position < curlen && current[position] != ' ';	334	for (; position < curlen && current[position] != ' ';
337	position++)	335	position++)
338	putchar(current[position]);	336	putchar(current[position]);
339	/* Copy to tmp last word */	337	/* Copy to tmp last word */
340	for (i = position - 1; i >= 0 && current[i] != ' '; i--)	338	for (i = position - 1; i >= 0 && current[i] != ' '; i--)
341	;	339	;
342	/* If word begins with * or &, skip it */	340	/* If word begins with * or &, skip it */
343	if (tmp[0] == '*' \|\| tmp[0] == '&')	341	if (tmp[0] == '*' \|\| tmp[0] == '&')
344	for (i = 1; tmp[i]; i++)	342	for (i = 1; tmp[i]; i++)
345	tmp[i - 1] = tmp[i];	343	tmp[i - 1] = tmp[i];
346	i++; /* I is at the start of the word */	344	i++; /* I is at the start of the word */
347	strncpy(tmp, current + i, position - i + 1);	345	strncpy(tmp, current + i, position - i + 1);
348		346
349	if (i == 0) { /* Command completion */	347	if (i == 0) { /* Command completion */
350	found = cmdtab_compl(tmp);	348	found = cmdtab_compl(tmp);
351	} else { /* Symtab completion */	349	} else { /* Symtab completion */
352	#ifdef CONFIG_SYMTAB	-
353	found = symtab_compl(tmp);	350	found = symtab_compl(tmp);
354	#else	-
355	found = 0;	-
356	#endif	-
357	}	351	}
358		352
359	if (found == 0)	353	if (found == 0)
360	continue;	354	continue;
361	for (i = 0; tmp[i] && curlen < MAX_CMDLINE;	355	for (i = 0; tmp[i] && curlen < MAX_CMDLINE;
362	i++, curlen++)	356	i++, curlen++)
363	insert_char(current, tmp[i], i + position);	357	insert_char(current, tmp[i], i + position);
364		358
365	if (strlen(tmp) \|\| found == 1) { /* If we have a hint */	359	if (strlen(tmp) \|\| found == 1) { /* If we have a hint */
366	for (i = position; i < curlen; i++)	360	for (i = position; i < curlen; i++)
367	putchar(current[i]);	361	putchar(current[i]);
368	position += strlen(tmp);	362	position += strlen(tmp);
369	/* Add space to end */	363	/* Add space to end */
370	if (found == 1 && position == curlen &&	364	if (found == 1 && position == curlen &&
371	curlen < MAX_CMDLINE) {	365	curlen < MAX_CMDLINE) {
372	current[position] = ' ';	366	current[position] = ' ';
373	curlen++;	367	curlen++;
374	position++;	368	position++;
375	putchar(' ');	369	putchar(' ');
376	}	370	}
377	} else { /* No hint, table was printed */	371	} else { /* No hint, table was printed */
378	printf("%s> ", prompt);	372	printf("%s> ", prompt);
379	for (i = 0; i < curlen; i++)	373	for (i = 0; i < curlen; i++)
380	putchar(current[i]);	374	putchar(current[i]);
381	position += strlen(tmp);	375	position += strlen(tmp);
382	}	376	}
383	rdln_print_c('\b', curlen - position);	377	rdln_print_c('\b', curlen - position);
384	continue;	378	continue;
385	}	379	}
386	if (c == 0x1b) { /* Special command */	380	if (c == 0x1b) { /* Special command */
387	mod = _getc(input);	381	mod = _getc(input);
388	c = _getc(input);	382	c = _getc(input);
389		383
390	if (mod != 0x5b && mod != 0x4f)	384	if (mod != 0x5b && mod != 0x4f)
391	continue;	385	continue;
392		386
393	if (c == 0x33 && _getc(input) == 0x7e) {	387	if (c == 0x33 && _getc(input) == 0x7e) {
394	/* Delete */	388	/* Delete */
395	if (position == curlen)	389	if (position == curlen)
396	continue;	390	continue;
397	for (i = position + 1; i < curlen; i++) {	391	for (i = position + 1; i < curlen; i++) {
398	putchar(current[i]);	392	putchar(current[i]);
399	current[i - 1] = current[i];	393	current[i - 1] = current[i];
400	}	394	}
401	putchar(' ');	395	putchar(' ');
402	rdln_print_c('\b', curlen - position);	396	rdln_print_c('\b', curlen - position);
403	curlen--;	397	curlen--;
404	} else if (c == 0x48) { /* Home */	398	} else if (c == 0x48) { /* Home */
405	rdln_print_c('\b', position);	399	rdln_print_c('\b', position);
406	position = 0;	400	position = 0;
407	} else if (c == 0x46) { /* End */	401	} else if (c == 0x46) { /* End */
408	for (i = position; i < curlen; i++)	402	for (i = position; i < curlen; i++)
409	putchar(current[i]);	403	putchar(current[i]);
410	position = curlen;	404	position = curlen;
411	} else if (c == 0x44) { /* Left */	405	} else if (c == 0x44) { /* Left */
412	if (position > 0) {	406	if (position > 0) {
413	putchar('\b');	407	putchar('\b');
414	position--;	408	position--;
415	}	409	}
416	continue;	410	continue;
417	} else if (c == 0x43) { /* Right */	411	} else if (c == 0x43) { /* Right */
418	if (position < curlen) {	412	if (position < curlen) {
419	putchar(current[position]);	413	putchar(current[position]);
420	position++;	414	position++;
421	}	415	}
422	continue;	416	continue;
423	} else if (c == 0x41 \|\| c == 0x42) {	417	} else if (c == 0x41 \|\| c == 0x42) {
424	/* Up, down */	418	/* Up, down */
425	rdln_print_c('\b', position);	419	rdln_print_c('\b', position);
426	rdln_print_c(' ', curlen);	420	rdln_print_c(' ', curlen);
427	rdln_print_c('\b', curlen);	421	rdln_print_c('\b', curlen);
428	if (c == 0x41) /* Up */	422	if (c == 0x41) /* Up */
429	histposition--;	423	histposition--;
430	else	424	else
431	histposition++;	425	histposition++;
432	if (histposition < 0) {	426	if (histposition < 0) {
433	histposition = KCONSOLE_HISTORY - 1;	427	histposition = KCONSOLE_HISTORY - 1;
434	} else {	428	} else {
435	histposition =	429	histposition =
436	histposition % KCONSOLE_HISTORY;	430	histposition % KCONSOLE_HISTORY;
437	}	431	}
438	current = history[histposition];	432	current = history[histposition];
439	printf("%s", current);	433	printf("%s", current);
440	curlen = strlen(current);	434	curlen = strlen(current);
441	position = curlen;	435	position = curlen;
442	continue;	436	continue;
443	}	437	}
444	continue;	438	continue;
445	}	439	}
446	if (curlen >= MAX_CMDLINE)	440	if (curlen >= MAX_CMDLINE)
447	continue;	441	continue;
448		442
449	insert_char(current, c, position);	443	insert_char(current, c, position);
450		444
451	curlen++;	445	curlen++;
452	for (i = position; i < curlen; i++)	446	for (i = position; i < curlen; i++)
453	putchar(current[i]);	447	putchar(current[i]);
454	position++;	448	position++;
455	rdln_print_c('\b',curlen - position);	449	rdln_print_c('\b',curlen - position);
456	}	450	}
457	if (curlen) {	451	if (curlen) {
458	histposition++;	452	histposition++;
459	histposition = histposition % KCONSOLE_HISTORY;	453	histposition = histposition % KCONSOLE_HISTORY;
460	}	454	}
461	current[curlen] = '\0';	455	current[curlen] = '\0';
462	return current;	456	return current;
463	}	457	}
464		458
465	bool kconsole_check_poll(void)	459	bool kconsole_check_poll(void)
466	{	460	{
467	return check_poll(stdin);	461	return check_poll(stdin);
468	}	462	}
469		463
470	/** Kernel console prompt.	464	/** Kernel console prompt.
471	*	465	*
472	* @param prompt Kernel console prompt (e.g kconsole/panic).	466	* @param prompt Kernel console prompt (e.g kconsole/panic).
473	* @param msg Message to display in the beginning.	467	* @param msg Message to display in the beginning.
474	* @param kcon Wait for keypress to show the prompt	468	* @param kcon Wait for keypress to show the prompt
475	* and never exit.	469	* and never exit.
476	*	470	*
477	*/	471	*/
478	void kconsole(char prompt, char msg, bool kcon)	472	void kconsole(char prompt, char msg, bool kcon)
479	{	473	{
480	cmd_info_t *cmd_info;	474	cmd_info_t *cmd_info;
481	count_t len;	475	count_t len;
482	char *cmdline;	476	char *cmdline;
483		477
484	if (!stdin) {	478	if (!stdin) {
485	LOG("No stdin for kernel console");	479	LOG("No stdin for kernel console");
486	return;	480	return;
487	}	481	}
488		482
489	if (msg)	483	if (msg)
490	printf("%s", msg);	484	printf("%s", msg);
491		485
492	if (kcon)	486	if (kcon)
493	_getc(stdin);	487	_getc(stdin);
494	else	488	else
495	printf("Type \"exit\" to leave the console.\n");	489	printf("Type \"exit\" to leave the console.\n");
496		490
497	while (true) {	491	while (true) {
498	cmdline = clever_readline((char *) prompt, stdin);	492	cmdline = clever_readline((char *) prompt, stdin);
499	len = strlen(cmdline);	493	len = strlen(cmdline);
500	if (!len)	494	if (!len)

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(root)/trunk/kernel/generic/src/console/kconsole.c – Rev 4132 → 4137