WebSVN – HelenOS – Diff – /tags/0.2.0.1/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.
 */
 
/**
 * @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 <typedefs.h>
#include <arch/types.h>
#include <adt/list.h>
#include <arch.h>
#include <macros.h>
#include <debug.h>
#include <func.h>
#include <symtab.h>
#include <macros.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] = {};
 
/** Initialize kconsole data structures. */
void kconsole_init(void)
{
    int i;
 
    cmd_init();
    for (i=0; i<KCONSOLE_HISTORY; i++)
        history[i][0] = '\0';
}
 
 
/** 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)
{
    int 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)
{
    char output[MAX_SYMBOL_NAME+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, MAX_SYMBOL_NAME);
    return found;
   
}
 
static char * clever_readline(const char *prompt, chardev_t *input)
{
    static int histposition = 0;
 
    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;
}
 
/** Kernel console managing thread.
 *
 * @param arg Not used.
 */
void kconsole(void *prompt)
{
    cmd_info_t *cmd_info;
    count_t len;
    char *cmdline;
 
    if (!stdin) {
        printf("%s: no stdin\n", __FUNCTION__);
        return;
    }
   
    while (true) {
        cmdline = clever_readline(prompt, stdin);
        len = strlen(cmdline);
        if (!len)
            continue;
        cmd_info = parse_cmdline(cmdline, len);
        if (!cmd_info)
            continue;
        if (strncmp(cmd_info->name,"exit", \
                min(strlen(cmd_info->name),5)) == 0)
            break;
        (void) cmd_info->func(cmd_info->argv);
    }
}
 
static int parse_int_arg(char *text, size_t len, __native *result)
{
    char symname[MAX_SYMBOL_NAME];
    __address symaddr;
    bool isaddr = false;
    bool isptr = false;
   
    /* 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));
        symaddr = get_symbol_addr(symname);
        if (!symaddr) {
            printf("Symbol %s not found.\n",symname);
            return -1;
        }
        if (symaddr == (__address) -1) {
            printf("Duplicate symbol %s.\n",symname);
            symtab_print_search(symname);
            return -1;
        }
        if (isaddr)
            *result = (__native)symaddr;
        else if (isptr)
            *result = **((__native **)symaddr);
        else
            *result = *((__native *)symaddr);
    } else { /* It's a number - convert it */
        *result = atoi(text);
        if (isptr)
            *result = *((__native *)*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;
    int 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 = 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 = 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 = (__native) 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)
{
    int i;
    bool found_start = false;
   
    ASSERT(start != NULL);
    ASSERT(end != NULL);
   
    for (i = *start; i < len; i++) {
        if (!found_start) {
            if (is_white(cmdline[i]))
                (*start)++;
            else
                found_start = true;
        } else {
            if (is_white(cmdline[i]))
                break;
        }
    }
    *end = i - 1;
 
    return found_start;
}
 

Rev 1965	Rev 1968
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	/**	29	/**
30	* @file kconsole.c	30	* @file kconsole.c
31	* @brief Kernel console.	31	* @brief Kernel console.
32	*	32	*
33	* This file contains kernel thread managing the kernel console.	33	* This file contains kernel thread managing the kernel console.
34	*/	34	*/
35		35
36	#include <console/kconsole.h>	36	#include <console/kconsole.h>
37	#include <console/console.h>	37	#include <console/console.h>
38	#include <console/chardev.h>	38	#include <console/chardev.h>
39	#include <console/cmd.h>	39	#include <console/cmd.h>
40	#include <print.h>	40	#include <print.h>
41	#include <panic.h>	41	#include <panic.h>
42	#include <typedefs.h>	42	#include <typedefs.h>
43	#include <arch/types.h>	43	#include <arch/types.h>
44	#include <adt/list.h>	44	#include <adt/list.h>
45	#include <arch.h>	45	#include <arch.h>
46	#include <macros.h>	46	#include <macros.h>
47	#include <debug.h>	47	#include <debug.h>
48	#include <func.h>	48	#include <func.h>
49	#include <symtab.h>	49	#include <symtab.h>
50	#include <macros.h>	50	#include <macros.h>
51		51
52	/** Simple kernel console.	52	/** Simple kernel console.
53	*	53	*
54	* The console is realized by kernel thread kconsole.	54	* The console is realized by kernel thread kconsole.
55	* It doesn't understand any useful command on its own,	55	* It doesn't understand any useful command on its own,
56	* but makes it possible for other kernel subsystems to	56	* but makes it possible for other kernel subsystems to
57	* register their own commands.	57	* register their own commands.
58	*/	58	*/
59		59
60	/** Locking.	60	/** Locking.
61	*	61	*
62	* There is a list of cmd_info_t structures. This list	62	* There is a list of cmd_info_t structures. This list
63	* is protected by cmd_lock spinlock. Note that specially	63	* is protected by cmd_lock spinlock. Note that specially
64	* the link elements of cmd_info_t are protected by	64	* the link elements of cmd_info_t are protected by
65	* this lock.	65	* this lock.
66	*	66	*
67	* Each cmd_info_t also has its own lock, which protects	67	* Each cmd_info_t also has its own lock, which protects
68	* all elements thereof except the link element.	68	* all elements thereof except the link element.
69	*	69	*
70	* cmd_lock must be acquired before any cmd_info lock.	70	* cmd_lock must be acquired before any cmd_info lock.
71	* When locking two cmd info structures, structure with	71	* When locking two cmd info structures, structure with
72	* lower address must be locked first.	72	* lower address must be locked first.
73	*/	73	*/
74		74
75	SPINLOCK_INITIALIZE(cmd_lock); /*< Lock protecting command list. /	75	SPINLOCK_INITIALIZE(cmd_lock); /*< Lock protecting command list. /
76	LIST_INITIALIZE(cmd_head); /*< Command list. /	76	LIST_INITIALIZE(cmd_head); /*< Command list. /
77		77
78	static cmd_info_t parse_cmdline(char cmdline, size_t len);	78	static cmd_info_t parse_cmdline(char cmdline, size_t len);
79	static bool parse_argument(char cmdline, size_t len, index_t start, index_t *end);	79	static bool parse_argument(char cmdline, size_t len, index_t start, index_t *end);
80	static char history[KCONSOLE_HISTORY][MAX_CMDLINE] = {};	80	static char history[KCONSOLE_HISTORY][MAX_CMDLINE] = {};
81		81
82	/** Initialize kconsole data structures. */	82	/** Initialize kconsole data structures. */
83	void kconsole_init(void)	83	void kconsole_init(void)
84	{	84	{
85	int i;	85	int i;
86		86
87	cmd_init();	87	cmd_init();
88	for (i=0; i<KCONSOLE_HISTORY; i++)	88	for (i=0; i<KCONSOLE_HISTORY; i++)
89	history[i][0] = '\0';	89	history[i][0] = '\0';
90	}	90	}
91		91
92		92
93	/** Register kconsole command.	93	/** Register kconsole command.
94	*	94	*
95	* @param cmd Structure describing the command.	95	* @param cmd Structure describing the command.
96	*	96	*
97	* @return 0 on failure, 1 on success.	97	* @return 0 on failure, 1 on success.
98	*/	98	*/
99	int cmd_register(cmd_info_t *cmd)	99	int cmd_register(cmd_info_t *cmd)
100	{	100	{
101	link_t *cur;	101	link_t *cur;
102		102
103	spinlock_lock(&cmd_lock);	103	spinlock_lock(&cmd_lock);
104		104
105	/*	105	/*
106	* Make sure the command is not already listed.	106	* Make sure the command is not already listed.
107	*/	107	*/
108	for (cur = cmd_head.next; cur != &cmd_head; cur = cur->next) {	108	for (cur = cmd_head.next; cur != &cmd_head; cur = cur->next) {
109	cmd_info_t *hlp;	109	cmd_info_t *hlp;
110		110
111	hlp = list_get_instance(cur, cmd_info_t, link);	111	hlp = list_get_instance(cur, cmd_info_t, link);
112		112
113	if (hlp == cmd) {	113	if (hlp == cmd) {
114	/* The command is already there. */	114	/* The command is already there. */
115	spinlock_unlock(&cmd_lock);	115	spinlock_unlock(&cmd_lock);
116	return 0;	116	return 0;
117	}	117	}
118		118
119	/* Avoid deadlock. */	119	/* Avoid deadlock. */
120	if (hlp < cmd) {	120	if (hlp < cmd) {
121	spinlock_lock(&hlp->lock);	121	spinlock_lock(&hlp->lock);
122	spinlock_lock(&cmd->lock);	122	spinlock_lock(&cmd->lock);
123	} else {	123	} else {
124	spinlock_lock(&cmd->lock);	124	spinlock_lock(&cmd->lock);
125	spinlock_lock(&hlp->lock);	125	spinlock_lock(&hlp->lock);
126	}	126	}
127	if ((strncmp(hlp->name,	127	if ((strncmp(hlp->name,
128	cmd->name, max(strlen(cmd->name),	128	cmd->name, max(strlen(cmd->name),
129	strlen(hlp->name))) == 0)) {	129	strlen(hlp->name))) == 0)) {
130	/* The command is already there. */	130	/* The command is already there. */
131	spinlock_unlock(&hlp->lock);	131	spinlock_unlock(&hlp->lock);
132	spinlock_unlock(&cmd->lock);	132	spinlock_unlock(&cmd->lock);
133	spinlock_unlock(&cmd_lock);	133	spinlock_unlock(&cmd_lock);
134	return 0;	134	return 0;
135	}	135	}
136		136
137	spinlock_unlock(&hlp->lock);	137	spinlock_unlock(&hlp->lock);
138	spinlock_unlock(&cmd->lock);	138	spinlock_unlock(&cmd->lock);
139	}	139	}
140		140
141	/*	141	/*
142	* Now the command can be added.	142	* Now the command can be added.
143	*/	143	*/
144	list_append(&cmd->link, &cmd_head);	144	list_append(&cmd->link, &cmd_head);
145		145
146	spinlock_unlock(&cmd_lock);	146	spinlock_unlock(&cmd_lock);
147	return 1;	147	return 1;
148	}	148	}
149		149
150	/** Print count times a character */	150	/** Print count times a character */
151	static void rdln_print_c(char ch, int count)	151	static void rdln_print_c(char ch, int count)
152	{	152	{
153	int i;	153	int i;
154	for (i=0;i<count;i++)	154	for (i=0;i<count;i++)
155	putchar(ch);	155	putchar(ch);
156	}	156	}
157		157
158	/** Insert character to string */	158	/** Insert character to string */
159	static void insert_char(char *str, char ch, int pos)	159	static void insert_char(char *str, char ch, int pos)
160	{	160	{
161	int i;	161	int i;
162		162
163	for (i=strlen(str);i > pos; i--)	163	for (i=strlen(str);i > pos; i--)
164	str[i] = str[i-1];	164	str[i] = str[i-1];
165	str[pos] = ch;	165	str[pos] = ch;
166	}	166	}
167		167
168	/** Try to find a command beginning with prefix */	168	/** Try to find a command beginning with prefix */
169	static const char * cmdtab_search_one(const char name,link_t *startpos)	169	static const char * cmdtab_search_one(const char name,link_t *startpos)
170	{	170	{
171	int namelen = strlen(name);	171	int namelen = strlen(name);
172	const char *curname;	172	const char *curname;
173		173
174	spinlock_lock(&cmd_lock);	174	spinlock_lock(&cmd_lock);
175		175
176	if (!*startpos)	176	if (!*startpos)
177	*startpos = cmd_head.next;	177	*startpos = cmd_head.next;
178		178
179	for (;startpos != &cmd_head;startpos = (*startpos)->next) {	179	for (;startpos != &cmd_head;startpos = (*startpos)->next) {
180	cmd_info_t *hlp;	180	cmd_info_t *hlp;
181	hlp = list_get_instance(*startpos, cmd_info_t, link);	181	hlp = list_get_instance(*startpos, cmd_info_t, link);
182		182
183	curname = hlp->name;	183	curname = hlp->name;
184	if (strlen(curname) < namelen)	184	if (strlen(curname) < namelen)
185	continue;	185	continue;
186	if (strncmp(curname, name, namelen) == 0) {	186	if (strncmp(curname, name, namelen) == 0) {
187	spinlock_unlock(&cmd_lock);	187	spinlock_unlock(&cmd_lock);
188	return curname+namelen;	188	return curname+namelen;
189	}	189	}
190	}	190	}
191	spinlock_unlock(&cmd_lock);	191	spinlock_unlock(&cmd_lock);
192	return NULL;	192	return NULL;
193	}	193	}
194		194
195		195
196	/** Command completion of the commands	196	/** Command completion of the commands
197	*	197	*
198	* @param name - string to match, changed to hint on exit	198	* @param name - string to match, changed to hint on exit
199	* @return number of found matches	199	* @return number of found matches
200	*/	200	*/
201	static int cmdtab_compl(char *name)	201	static int cmdtab_compl(char *name)
202	{	202	{
203	char output[MAX_SYMBOL_NAME+1];	203	char output[MAX_SYMBOL_NAME+1];
204	link_t *startpos = NULL;	204	link_t *startpos = NULL;
205	const char *foundtxt;	205	const char *foundtxt;
206	int found = 0;	206	int found = 0;
207	int i;	207	int i;
208		208
209	output[0] = '\0';	209	output[0] = '\0';
210	while ((foundtxt = cmdtab_search_one(name, &startpos))) {	210	while ((foundtxt = cmdtab_search_one(name, &startpos))) {
211	startpos = startpos->next;	211	startpos = startpos->next;
212	if (!found)	212	if (!found)
213	strncpy(output, foundtxt, strlen(foundtxt)+1);	213	strncpy(output, foundtxt, strlen(foundtxt)+1);
214	else {	214	else {
215	for (i=0; output[i] && foundtxt[i] && output[i]==foundtxt[i]; i++)	215	for (i=0; output[i] && foundtxt[i] && output[i]==foundtxt[i]; i++)
216	;	216	;
217	output[i] = '\0';	217	output[i] = '\0';
218	}	218	}
219	found++;	219	found++;
220	}	220	}
221	if (!found)	221	if (!found)
222	return 0;	222	return 0;
223		223
224	if (found > 1 && !strlen(output)) {	224	if (found > 1 && !strlen(output)) {
225	printf("\n");	225	printf("\n");
226	startpos = NULL;	226	startpos = NULL;
227	while ((foundtxt = cmdtab_search_one(name, &startpos))) {	227	while ((foundtxt = cmdtab_search_one(name, &startpos))) {
228	cmd_info_t *hlp;	228	cmd_info_t *hlp;
229	hlp = list_get_instance(startpos, cmd_info_t, link);	229	hlp = list_get_instance(startpos, cmd_info_t, link);
230	printf("%s - %s\n", hlp->name, hlp->description);	230	printf("%s - %s\n", hlp->name, hlp->description);
231	startpos = startpos->next;	231	startpos = startpos->next;
232	}	232	}
233	}	233	}
234	strncpy(name, output, MAX_SYMBOL_NAME);	234	strncpy(name, output, MAX_SYMBOL_NAME);
235	return found;	235	return found;
236		236
237	}	237	}
238		238
239	static char * clever_readline(const char prompt, chardev_t input)	239	static char * clever_readline(const char prompt, chardev_t input)
240	{	240	{
241	static int histposition = 0;	241	static int histposition = 0;
242		242
243	char tmp[MAX_CMDLINE+1];	243	char tmp[MAX_CMDLINE+1];
244	int curlen = 0, position = 0;	244	int curlen = 0, position = 0;
245	char *current = history[histposition];	245	char *current = history[histposition];
246	int i;	246	int i;
247	char mod; /* Command Modifier */	247	char mod; /* Command Modifier */
248	char c;	248	char c;
249		249
250	printf("%s> ", prompt);	250	printf("%s> ", prompt);
251	while (1) {	251	while (1) {
252	c = _getc(input);	252	c = _getc(input);
253	if (c == '\n') {	253	if (c == '\n') {
254	putchar(c);	254	putchar(c);
255	break;	255	break;
256	} if (c == '\b') { /* Backspace */	256	} if (c == '\b') { /* Backspace */
257	if (position == 0)	257	if (position == 0)
258	continue;	258	continue;
259	for (i=position; i<curlen;i++)	259	for (i=position; i<curlen;i++)
260	current[i-1] = current[i];	260	current[i-1] = current[i];
261	curlen--;	261	curlen--;
262	position--;	262	position--;
263	putchar('\b');	263	putchar('\b');
264	for (i=position;i<curlen;i++)	264	for (i=position;i<curlen;i++)
265	putchar(current[i]);	265	putchar(current[i]);
266	putchar(' ');	266	putchar(' ');
267	rdln_print_c('\b',curlen-position+1);	267	rdln_print_c('\b',curlen-position+1);
268	continue;	268	continue;
269	}	269	}
270	if (c == '\t') { /* Tabulator */	270	if (c == '\t') { /* Tabulator */
271	int found;	271	int found;
272		272
273	/* Move to the end of the word */	273	/* Move to the end of the word */
274	for (;position<curlen && current[position]!=' ';position++)	274	for (;position<curlen && current[position]!=' ';position++)
275	putchar(current[position]);	275	putchar(current[position]);
276	/* Copy to tmp last word */	276	/* Copy to tmp last word */
277	for (i=position-1;i >= 0 && current[i]!=' ' ;i--)	277	for (i=position-1;i >= 0 && current[i]!=' ' ;i--)
278	;	278	;
279	/* If word begins with * or &, skip it */	279	/* If word begins with * or &, skip it */
280	if (tmp[0] == '*' \|\| tmp[0] == '&')	280	if (tmp[0] == '*' \|\| tmp[0] == '&')
281	for (i=1;tmp[i];i++)	281	for (i=1;tmp[i];i++)
282	tmp[i-1] = tmp[i];	282	tmp[i-1] = tmp[i];
283	i++; /* I is at the start of the word */	283	i++; /* I is at the start of the word */
284	strncpy(tmp, current+i, position-i+1);	284	strncpy(tmp, current+i, position-i+1);
285		285
286	if (i==0) { /* Command completion */	286	if (i==0) { /* Command completion */
287	found = cmdtab_compl(tmp);	287	found = cmdtab_compl(tmp);
288	} else { /* Symtab completion */	288	} else { /* Symtab completion */
289	found = symtab_compl(tmp);	289	found = symtab_compl(tmp);
290	}	290	}
291		291
292	if (found == 0)	292	if (found == 0)
293	continue;	293	continue;
294	for (i=0;tmp[i] && curlen < MAX_CMDLINE;i++,curlen++)	294	for (i=0;tmp[i] && curlen < MAX_CMDLINE;i++,curlen++)
295	insert_char(current, tmp[i], i+position);	295	insert_char(current, tmp[i], i+position);
296		296
297	if (strlen(tmp) \|\| found==1) { /* If we have a hint */	297	if (strlen(tmp) \|\| found==1) { /* If we have a hint */
298	for (i=position;i<curlen;i++)	298	for (i=position;i<curlen;i++)
299	putchar(current[i]);	299	putchar(current[i]);
300	position += strlen(tmp);	300	position += strlen(tmp);
301	/* Add space to end */	301	/* Add space to end */
302	if (found == 1 && position == curlen && \	302	if (found == 1 && position == curlen && \
303	curlen < MAX_CMDLINE) {	303	curlen < MAX_CMDLINE) {
304	current[position] = ' ';	304	current[position] = ' ';
305	curlen++;	305	curlen++;
306	position++;	306	position++;
307	putchar(' ');	307	putchar(' ');
308	}	308	}
309	} else { /* No hint, table was printed */	309	} else { /* No hint, table was printed */
310	printf("%s> ", prompt);	310	printf("%s> ", prompt);
311	for (i=0; i<curlen;i++)	311	for (i=0; i<curlen;i++)
312	putchar(current[i]);	312	putchar(current[i]);
313	position += strlen(tmp);	313	position += strlen(tmp);
314	}	314	}
315	rdln_print_c('\b', curlen-position);	315	rdln_print_c('\b', curlen-position);
316	continue;	316	continue;
317	}	317	}
318	if (c == 0x1b) { /* Special command */	318	if (c == 0x1b) { /* Special command */
319	mod = _getc(input);	319	mod = _getc(input);
320	c = _getc(input);	320	c = _getc(input);
321		321
322	if (mod != 0x5b && mod != 0x4f)	322	if (mod != 0x5b && mod != 0x4f)
323	continue;	323	continue;
324		324
325	if (c == 0x33 && _getc(input) == 0x7e) {	325	if (c == 0x33 && _getc(input) == 0x7e) {
326	/* Delete */	326	/* Delete */
327	if (position == curlen)	327	if (position == curlen)
328	continue;	328	continue;
329	for (i=position+1; i<curlen;i++) {	329	for (i=position+1; i<curlen;i++) {
330	putchar(current[i]);	330	putchar(current[i]);
331	current[i-1] = current[i];	331	current[i-1] = current[i];
332	}	332	}
333	putchar(' ');	333	putchar(' ');
334	rdln_print_c('\b',curlen-position);	334	rdln_print_c('\b',curlen-position);
335	curlen--;	335	curlen--;
336	}	336	}
337	else if (c == 0x48) { /* Home */	337	else if (c == 0x48) { /* Home */
338	rdln_print_c('\b',position);	338	rdln_print_c('\b',position);
339	position = 0;	339	position = 0;
340	}	340	}
341	else if (c == 0x46) { /* End */	341	else if (c == 0x46) { /* End */
342	for (i=position;i<curlen;i++)	342	for (i=position;i<curlen;i++)
343	putchar(current[i]);	343	putchar(current[i]);
344	position = curlen;	344	position = curlen;
345	}	345	}
346	else if (c == 0x44) { /* Left */	346	else if (c == 0x44) { /* Left */
347	if (position > 0) {	347	if (position > 0) {
348	putchar('\b');	348	putchar('\b');
349	position--;	349	position--;
350	}	350	}
351	continue;	351	continue;
352	}	352	}
353	else if (c == 0x43) { /* Right */	353	else if (c == 0x43) { /* Right */
354	if (position < curlen) {	354	if (position < curlen) {
355	putchar(current[position]);	355	putchar(current[position]);
356	position++;	356	position++;
357	}	357	}
358	continue;	358	continue;
359	}	359	}
360	else if (c == 0x41 \|\| c == 0x42) {	360	else if (c == 0x41 \|\| c == 0x42) {
361	/* Up,down */	361	/* Up,down */
362	rdln_print_c('\b',position);	362	rdln_print_c('\b',position);
363	rdln_print_c(' ',curlen);	363	rdln_print_c(' ',curlen);
364	rdln_print_c('\b',curlen);	364	rdln_print_c('\b',curlen);
365	if (c == 0x41) /* Up */	365	if (c == 0x41) /* Up */
366	histposition--;	366	histposition--;
367	else	367	else
368	histposition++;	368	histposition++;
369	if (histposition < 0)	369	if (histposition < 0)
370	histposition = KCONSOLE_HISTORY -1 ;	370	histposition = KCONSOLE_HISTORY -1 ;
371	else	371	else
372	histposition = histposition % KCONSOLE_HISTORY;	372	histposition = histposition % KCONSOLE_HISTORY;
373	current = history[histposition];	373	current = history[histposition];
374	printf("%s", current);	374	printf("%s", current);
375	curlen = strlen(current);	375	curlen = strlen(current);
376	position = curlen;	376	position = curlen;
377	continue;	377	continue;
378	}	378	}
379	continue;	379	continue;
380	}	380	}
381	if (curlen >= MAX_CMDLINE)	381	if (curlen >= MAX_CMDLINE)
382	continue;	382	continue;
383		383
384	insert_char(current, c, position);	384	insert_char(current, c, position);
385		385
386	curlen++;	386	curlen++;
387	for (i=position;i<curlen;i++)	387	for (i=position;i<curlen;i++)
388	putchar(current[i]);	388	putchar(current[i]);
389	position++;	389	position++;
390	rdln_print_c('\b',curlen-position);	390	rdln_print_c('\b',curlen-position);
391	}	391	}
392	if (curlen) {	392	if (curlen) {
393	histposition++;	393	histposition++;
394	histposition = histposition % KCONSOLE_HISTORY;	394	histposition = histposition % KCONSOLE_HISTORY;
395	}	395	}
396	current[curlen] = '\0';	396	current[curlen] = '\0';
397	return current;	397	return current;
398	}	398	}
399		399
400	/** Kernel console managing thread.	400	/** Kernel console managing thread.
401	*	401	*
402	* @param arg Not used.	402	* @param arg Not used.
403	*/	403	*/
404	void kconsole(void *prompt)	404	void kconsole(void *prompt)
405	{	405	{
406	cmd_info_t *cmd_info;	406	cmd_info_t *cmd_info;
407	count_t len;	407	count_t len;
408	char *cmdline;	408	char *cmdline;
409		409
410	if (!stdin) {	410	if (!stdin) {
411	printf("%s: no stdin\n", __FUNCTION__);	411	printf("%s: no stdin\n", __FUNCTION__);
412	return;	412	return;
413	}	413	}
414		414
415	while (true) {	415	while (true) {
416	cmdline = clever_readline(prompt, stdin);	416	cmdline = clever_readline(prompt, stdin);
417	len = strlen(cmdline);	417	len = strlen(cmdline);
418	if (!len)	418	if (!len)
419	continue;	419	continue;
420	cmd_info = parse_cmdline(cmdline, len);	420	cmd_info = parse_cmdline(cmdline, len);
421	if (!cmd_info)	421	if (!cmd_info)
422	continue;	422	continue;
423	if (strncmp(cmd_info->name,"exit", \	423	if (strncmp(cmd_info->name,"exit", \
424	min(strlen(cmd_info->name),5)) == 0)	424	min(strlen(cmd_info->name),5)) == 0)
425	break;	425	break;
426	(void) cmd_info->func(cmd_info->argv);	426	(void) cmd_info->func(cmd_info->argv);
427	}	427	}
428	}	428	}
429		429
430	static int parse_int_arg(char text, size_t len, __native result)	430	static int parse_int_arg(char text, size_t len, __native result)
431	{	431	{
432	char symname[MAX_SYMBOL_NAME];	432	char symname[MAX_SYMBOL_NAME];
433	__address symaddr;	433	__address symaddr;
434	bool isaddr = false;	434	bool isaddr = false;
435	bool isptr = false;	435	bool isptr = false;
436		436
437	/* If we get a name, try to find it in symbol table */	437	/* If we get a name, try to find it in symbol table */
438	if (text[0] == '&') {	438	if (text[0] == '&') {
439	isaddr = true;	439	isaddr = true;
440	text++;len--;	440	text++;len--;
441	} else if (text[0] == '*') {	441	} else if (text[0] == '*') {
442	isptr = true;	442	isptr = true;
443	text++;len--;	443	text++;len--;
444	}	444	}
445	if (text[0] < '0' \|\| text[0] > '9') {	445	if (text[0] < '0' \|\| text[0] > '9') {
446	strncpy(symname, text, min(len+1, MAX_SYMBOL_NAME));	446	strncpy(symname, text, min(len+1, MAX_SYMBOL_NAME));
447	symaddr = get_symbol_addr(symname);	447	symaddr = get_symbol_addr(symname);
448	if (!symaddr) {	448	if (!symaddr) {
449	printf("Symbol %s not found.\n",symname);	449	printf("Symbol %s not found.\n",symname);
450	return -1;	450	return -1;
451	}	451	}
452	if (symaddr == (__address) -1) {	452	if (symaddr == (__address) -1) {
453	printf("Duplicate symbol %s.\n",symname);	453	printf("Duplicate symbol %s.\n",symname);
454	symtab_print_search(symname);	454	symtab_print_search(symname);
455	return -1;	455	return -1;
456	}	456	}
457	if (isaddr)	457	if (isaddr)
458	*result = (__native)symaddr;	458	*result = (__native)symaddr;
459	else if (isptr)	459	else if (isptr)
460	result = ((__native *)symaddr);	460	result = ((__native *)symaddr);
461	else	461	else
462	result = ((__native *)symaddr);	462	result = ((__native *)symaddr);
463	} else { /* It's a number - convert it */	463	} else { /* It's a number - convert it */
464	*result = atoi(text);	464	*result = atoi(text);
465	if (isptr)	465	if (isptr)
466	result = ((__native )result);	466	result = ((__native )result);
467	}	467	}
468		468
469	return 0;	469	return 0;
470	}	470	}
471		471
472	/** Parse command line.	472	/** Parse command line.
473	*	473	*
474	* @param cmdline Command line as read from input device.	474	* @param cmdline Command line as read from input device.
475	* @param len Command line length.	475	* @param len Command line length.
476	*	476	*
477	* @return Structure describing the command.	477	* @return Structure describing the command.
478	*/	478	*/
479	cmd_info_t parse_cmdline(char cmdline, size_t len)	479	cmd_info_t parse_cmdline(char cmdline, size_t len)
480	{	480	{
481	index_t start = 0, end = 0;	481	index_t start = 0, end = 0;
482	cmd_info_t *cmd = NULL;	482	cmd_info_t *cmd = NULL;
483	link_t *cur;	483	link_t *cur;
484	int i;	484	int i;
485	int error = 0;	485	int error = 0;
486		486
487	if (!parse_argument(cmdline, len, &start, &end)) {	487	if (!parse_argument(cmdline, len, &start, &end)) {
488	/* Command line did not contain alphanumeric word. */	488	/* Command line did not contain alphanumeric word. */
489	return NULL;	489	return NULL;
490	}	490	}
491		491
492	spinlock_lock(&cmd_lock);	492	spinlock_lock(&cmd_lock);
493		493
494	for (cur = cmd_head.next; cur != &cmd_head; cur = cur->next) {	494	for (cur = cmd_head.next; cur != &cmd_head; cur = cur->next) {
495	cmd_info_t *hlp;	495	cmd_info_t *hlp;
496		496
497	hlp = list_get_instance(cur, cmd_info_t, link);	497	hlp = list_get_instance(cur, cmd_info_t, link);
498	spinlock_lock(&hlp->lock);	498	spinlock_lock(&hlp->lock);
499		499
500	if (strncmp(hlp->name, &cmdline[start], max(strlen(hlp->name),	500	if (strncmp(hlp->name, &cmdline[start], max(strlen(hlp->name),

Subversion Repositories HelenOS

(root)/tags/0.2.0.1/kernel/generic/src/console/kconsole.c – Rev 1965 → 1968