WebSVN – HelenOS-historic – Diff – /kernel/trunk/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.
 */
 
#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] < '0' || text[0] > '9') {
        if (text[0] == '&') {
            isaddr = true;
            text++;len--;
        } else if (text[0] == '*') {
            isptr = true;
            text++;len--;
        }
        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);
    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 668	Rev 788
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	#include <console/kconsole.h>	29	#include <console/kconsole.h>
30	#include <console/console.h>	30	#include <console/console.h>
31	#include <console/chardev.h>	31	#include <console/chardev.h>
32	#include <console/cmd.h>	32	#include <console/cmd.h>
33	#include <print.h>	33	#include <print.h>
34	#include <panic.h>	34	#include <panic.h>
35	#include <typedefs.h>	35	#include <typedefs.h>
36	#include <arch/types.h>	36	#include <arch/types.h>
37	#include <list.h>	37	#include <adt/list.h>
38	#include <arch.h>	38	#include <arch.h>
39	#include <macros.h>	39	#include <macros.h>
40	#include <debug.h>	40	#include <debug.h>
41	#include <func.h>	41	#include <func.h>
42	#include <symtab.h>	42	#include <symtab.h>
43	#include <macros.h>	43	#include <macros.h>
44		44
45	/** Simple kernel console.	45	/** Simple kernel console.
46	*	46	*
47	* The console is realized by kernel thread kconsole.	47	* The console is realized by kernel thread kconsole.
48	* It doesn't understand any useful command on its own,	48	* It doesn't understand any useful command on its own,
49	* but makes it possible for other kernel subsystems to	49	* but makes it possible for other kernel subsystems to
50	* register their own commands.	50	* register their own commands.
51	*/	51	*/
52		52
53	/** Locking.	53	/** Locking.
54	*	54	*
55	* There is a list of cmd_info_t structures. This list	55	* There is a list of cmd_info_t structures. This list
56	* is protected by cmd_lock spinlock. Note that specially	56	* is protected by cmd_lock spinlock. Note that specially
57	* the link elements of cmd_info_t are protected by	57	* the link elements of cmd_info_t are protected by
58	* this lock.	58	* this lock.
59	*	59	*
60	* Each cmd_info_t also has its own lock, which protects	60	* Each cmd_info_t also has its own lock, which protects
61	* all elements thereof except the link element.	61	* all elements thereof except the link element.
62	*	62	*
63	* cmd_lock must be acquired before any cmd_info lock.	63	* cmd_lock must be acquired before any cmd_info lock.
64	* When locking two cmd info structures, structure with	64	* When locking two cmd info structures, structure with
65	* lower address must be locked first.	65	* lower address must be locked first.
66	*/	66	*/
67		67
68	SPINLOCK_INITIALIZE(cmd_lock); /*< Lock protecting command list. /	68	SPINLOCK_INITIALIZE(cmd_lock); /*< Lock protecting command list. /
69	LIST_INITIALIZE(cmd_head); /*< Command list. /	69	LIST_INITIALIZE(cmd_head); /*< Command list. /
70		70
71	static cmd_info_t parse_cmdline(char cmdline, size_t len);	71	static cmd_info_t parse_cmdline(char cmdline, size_t len);
72	static bool parse_argument(char cmdline, size_t len, index_t start, index_t *end);	72	static bool parse_argument(char cmdline, size_t len, index_t start, index_t *end);
73	static char history[KCONSOLE_HISTORY][MAX_CMDLINE] = {};	73	static char history[KCONSOLE_HISTORY][MAX_CMDLINE] = {};
74		74
75	/** Initialize kconsole data structures. */	75	/** Initialize kconsole data structures. */
76	void kconsole_init(void)	76	void kconsole_init(void)
77	{	77	{
78	int i;	78	int i;
79		79
80	cmd_init();	80	cmd_init();
81	for (i=0; i<KCONSOLE_HISTORY; i++)	81	for (i=0; i<KCONSOLE_HISTORY; i++)
82	history[i][0] = '\0';	82	history[i][0] = '\0';
83	}	83	}
84		84
85		85
86	/** Register kconsole command.	86	/** Register kconsole command.
87	*	87	*
88	* @param cmd Structure describing the command.	88	* @param cmd Structure describing the command.
89	*	89	*
90	* @return 0 on failure, 1 on success.	90	* @return 0 on failure, 1 on success.
91	*/	91	*/
92	int cmd_register(cmd_info_t *cmd)	92	int cmd_register(cmd_info_t *cmd)
93	{	93	{
94	link_t *cur;	94	link_t *cur;
95		95
96	spinlock_lock(&cmd_lock);	96	spinlock_lock(&cmd_lock);
97		97
98	/*	98	/*
99	* Make sure the command is not already listed.	99	* Make sure the command is not already listed.
100	*/	100	*/
101	for (cur = cmd_head.next; cur != &cmd_head; cur = cur->next) {	101	for (cur = cmd_head.next; cur != &cmd_head; cur = cur->next) {
102	cmd_info_t *hlp;	102	cmd_info_t *hlp;
103		103
104	hlp = list_get_instance(cur, cmd_info_t, link);	104	hlp = list_get_instance(cur, cmd_info_t, link);
105		105
106	if (hlp == cmd) {	106	if (hlp == cmd) {
107	/* The command is already there. */	107	/* The command is already there. */
108	spinlock_unlock(&cmd_lock);	108	spinlock_unlock(&cmd_lock);
109	return 0;	109	return 0;
110	}	110	}
111		111
112	/* Avoid deadlock. */	112	/* Avoid deadlock. */
113	if (hlp < cmd) {	113	if (hlp < cmd) {
114	spinlock_lock(&hlp->lock);	114	spinlock_lock(&hlp->lock);
115	spinlock_lock(&cmd->lock);	115	spinlock_lock(&cmd->lock);
116	} else {	116	} else {
117	spinlock_lock(&cmd->lock);	117	spinlock_lock(&cmd->lock);
118	spinlock_lock(&hlp->lock);	118	spinlock_lock(&hlp->lock);
119	}	119	}
120	if ((strncmp(hlp->name,	120	if ((strncmp(hlp->name,
121	cmd->name, max(strlen(cmd->name),	121	cmd->name, max(strlen(cmd->name),
122	strlen(hlp->name))) == 0)) {	122	strlen(hlp->name))) == 0)) {
123	/* The command is already there. */	123	/* The command is already there. */
124	spinlock_unlock(&hlp->lock);	124	spinlock_unlock(&hlp->lock);
125	spinlock_unlock(&cmd->lock);	125	spinlock_unlock(&cmd->lock);
126	spinlock_unlock(&cmd_lock);	126	spinlock_unlock(&cmd_lock);
127	return 0;	127	return 0;
128	}	128	}
129		129
130	spinlock_unlock(&hlp->lock);	130	spinlock_unlock(&hlp->lock);
131	spinlock_unlock(&cmd->lock);	131	spinlock_unlock(&cmd->lock);
132	}	132	}
133		133
134	/*	134	/*
135	* Now the command can be added.	135	* Now the command can be added.
136	*/	136	*/
137	list_append(&cmd->link, &cmd_head);	137	list_append(&cmd->link, &cmd_head);
138		138
139	spinlock_unlock(&cmd_lock);	139	spinlock_unlock(&cmd_lock);
140	return 1;	140	return 1;
141	}	141	}
142		142
143	/** Print count times a character */	143	/** Print count times a character */
144	static void rdln_print_c(char ch, int count)	144	static void rdln_print_c(char ch, int count)
145	{	145	{
146	int i;	146	int i;
147	for (i=0;i<count;i++)	147	for (i=0;i<count;i++)
148	putchar(ch);	148	putchar(ch);
149	}	149	}
150		150
151	/** Insert character to string */	151	/** Insert character to string */
152	static void insert_char(char *str, char ch, int pos)	152	static void insert_char(char *str, char ch, int pos)
153	{	153	{
154	int i;	154	int i;
155		155
156	for (i=strlen(str);i > pos; i--)	156	for (i=strlen(str);i > pos; i--)
157	str[i] = str[i-1];	157	str[i] = str[i-1];
158	str[pos] = ch;	158	str[pos] = ch;
159	}	159	}
160		160
161	/** Try to find a command beginning with prefix */	161	/** Try to find a command beginning with prefix */
162	static const char * cmdtab_search_one(const char name,link_t *startpos)	162	static const char * cmdtab_search_one(const char name,link_t *startpos)
163	{	163	{
164	int namelen = strlen(name);	164	int namelen = strlen(name);
165	const char *curname;	165	const char *curname;
166		166
167	spinlock_lock(&cmd_lock);	167	spinlock_lock(&cmd_lock);
168		168
169	if (!*startpos)	169	if (!*startpos)
170	*startpos = cmd_head.next;	170	*startpos = cmd_head.next;
171		171
172	for (;startpos != &cmd_head;startpos = (*startpos)->next) {	172	for (;startpos != &cmd_head;startpos = (*startpos)->next) {
173	cmd_info_t *hlp;	173	cmd_info_t *hlp;
174	hlp = list_get_instance(*startpos, cmd_info_t, link);	174	hlp = list_get_instance(*startpos, cmd_info_t, link);
175		175
176	curname = hlp->name;	176	curname = hlp->name;
177	if (strlen(curname) < namelen)	177	if (strlen(curname) < namelen)
178	continue;	178	continue;
179	if (strncmp(curname, name, namelen) == 0) {	179	if (strncmp(curname, name, namelen) == 0) {
180	spinlock_unlock(&cmd_lock);	180	spinlock_unlock(&cmd_lock);
181	return curname+namelen;	181	return curname+namelen;
182	}	182	}
183	}	183	}
184	spinlock_unlock(&cmd_lock);	184	spinlock_unlock(&cmd_lock);
185	return NULL;	185	return NULL;
186	}	186	}
187		187
188		188
189	/** Command completion of the commands	189	/** Command completion of the commands
190	*	190	*
191	* @param name - string to match, changed to hint on exit	191	* @param name - string to match, changed to hint on exit
192	* @return number of found matches	192	* @return number of found matches
193	*/	193	*/
194	static int cmdtab_compl(char *name)	194	static int cmdtab_compl(char *name)
195	{	195	{
196	char output[MAX_SYMBOL_NAME+1];	196	char output[MAX_SYMBOL_NAME+1];
197	link_t *startpos = NULL;	197	link_t *startpos = NULL;
198	const char *foundtxt;	198	const char *foundtxt;
199	int found = 0;	199	int found = 0;
200	int i;	200	int i;
201		201
202	output[0] = '\0';	202	output[0] = '\0';
203	while ((foundtxt = cmdtab_search_one(name, &startpos))) {	203	while ((foundtxt = cmdtab_search_one(name, &startpos))) {
204	startpos = startpos->next;	204	startpos = startpos->next;
205	if (!found)	205	if (!found)
206	strncpy(output, foundtxt, strlen(foundtxt)+1);	206	strncpy(output, foundtxt, strlen(foundtxt)+1);
207	else {	207	else {
208	for (i=0; output[i] && foundtxt[i] && output[i]==foundtxt[i]; i++)	208	for (i=0; output[i] && foundtxt[i] && output[i]==foundtxt[i]; i++)
209	;	209	;
210	output[i] = '\0';	210	output[i] = '\0';
211	}	211	}
212	found++;	212	found++;
213	}	213	}
214	if (!found)	214	if (!found)
215	return 0;	215	return 0;
216		216
217	if (found > 1 && !strlen(output)) {	217	if (found > 1 && !strlen(output)) {
218	printf("\n");	218	printf("\n");
219	startpos = NULL;	219	startpos = NULL;
220	while ((foundtxt = cmdtab_search_one(name, &startpos))) {	220	while ((foundtxt = cmdtab_search_one(name, &startpos))) {
221	cmd_info_t *hlp;	221	cmd_info_t *hlp;
222	hlp = list_get_instance(startpos, cmd_info_t, link);	222	hlp = list_get_instance(startpos, cmd_info_t, link);
223	printf("%s - %s\n", hlp->name, hlp->description);	223	printf("%s - %s\n", hlp->name, hlp->description);
224	startpos = startpos->next;	224	startpos = startpos->next;
225	}	225	}
226	}	226	}
227	strncpy(name, output, MAX_SYMBOL_NAME);	227	strncpy(name, output, MAX_SYMBOL_NAME);
228	return found;	228	return found;
229		229
230	}	230	}
231		231
232	static char * clever_readline(const char prompt, chardev_t input)	232	static char * clever_readline(const char prompt, chardev_t input)
233	{	233	{
234	static int histposition = 0;	234	static int histposition = 0;
235		235
236	char tmp[MAX_CMDLINE+1];	236	char tmp[MAX_CMDLINE+1];
237	int curlen = 0, position = 0;	237	int curlen = 0, position = 0;
238	char *current = history[histposition];	238	char *current = history[histposition];
239	int i;	239	int i;
240	char mod; /* Command Modifier */	240	char mod; /* Command Modifier */
241	char c;	241	char c;
242		242
243	printf("%s> ", prompt);	243	printf("%s> ", prompt);
244	while (1) {	244	while (1) {
245	c = _getc(input);	245	c = _getc(input);
246	if (c == '\n') {	246	if (c == '\n') {
247	putchar(c);	247	putchar(c);
248	break;	248	break;
249	} if (c == '\b') { /* Backspace */	249	} if (c == '\b') { /* Backspace */
250	if (position == 0)	250	if (position == 0)
251	continue;	251	continue;
252	for (i=position; i<curlen;i++)	252	for (i=position; i<curlen;i++)
253	current[i-1] = current[i];	253	current[i-1] = current[i];
254	curlen--;	254	curlen--;
255	position--;	255	position--;
256	putchar('\b');	256	putchar('\b');
257	for (i=position;i<curlen;i++)	257	for (i=position;i<curlen;i++)
258	putchar(current[i]);	258	putchar(current[i]);
259	putchar(' ');	259	putchar(' ');
260	rdln_print_c('\b',curlen-position+1);	260	rdln_print_c('\b',curlen-position+1);
261	continue;	261	continue;
262	}	262	}
263	if (c == '\t') { /* Tabulator */	263	if (c == '\t') { /* Tabulator */
264	int found;	264	int found;
265		265
266	/* Move to the end of the word */	266	/* Move to the end of the word */
267	for (;position<curlen && current[position]!=' ';position++)	267	for (;position<curlen && current[position]!=' ';position++)
268	putchar(current[position]);	268	putchar(current[position]);
269	/* Copy to tmp last word */	269	/* Copy to tmp last word */
270	for (i=position-1;i >= 0 && current[i]!=' ' ;i--)	270	for (i=position-1;i >= 0 && current[i]!=' ' ;i--)
271	;	271	;
272	/* If word begins with * or &, skip it */	272	/* If word begins with * or &, skip it */
273	if (tmp[0] == '*' \|\| tmp[0] == '&')	273	if (tmp[0] == '*' \|\| tmp[0] == '&')
274	for (i=1;tmp[i];i++)	274	for (i=1;tmp[i];i++)
275	tmp[i-1] = tmp[i];	275	tmp[i-1] = tmp[i];
276	i++; /* I is at the start of the word */	276	i++; /* I is at the start of the word */
277	strncpy(tmp, current+i, position-i+1);	277	strncpy(tmp, current+i, position-i+1);
278		278
279	if (i==0) { /* Command completion */	279	if (i==0) { /* Command completion */
280	found = cmdtab_compl(tmp);	280	found = cmdtab_compl(tmp);
281	} else { /* Symtab completion */	281	} else { /* Symtab completion */
282	found = symtab_compl(tmp);	282	found = symtab_compl(tmp);
283	}	283	}
284		284
285	if (found == 0)	285	if (found == 0)
286	continue;	286	continue;
287	for (i=0;tmp[i] && curlen < MAX_CMDLINE;i++,curlen++)	287	for (i=0;tmp[i] && curlen < MAX_CMDLINE;i++,curlen++)
288	insert_char(current, tmp[i], i+position);	288	insert_char(current, tmp[i], i+position);
289		289
290	if (strlen(tmp) \|\| found==1) { /* If we have a hint */	290	if (strlen(tmp) \|\| found==1) { /* If we have a hint */
291	for (i=position;i<curlen;i++)	291	for (i=position;i<curlen;i++)
292	putchar(current[i]);	292	putchar(current[i]);
293	position += strlen(tmp);	293	position += strlen(tmp);
294	/* Add space to end */	294	/* Add space to end */
295	if (found == 1 && position == curlen && \	295	if (found == 1 && position == curlen && \
296	curlen < MAX_CMDLINE) {	296	curlen < MAX_CMDLINE) {
297	current[position] = ' ';	297	current[position] = ' ';
298	curlen++;	298	curlen++;
299	position++;	299	position++;
300	putchar(' ');	300	putchar(' ');
301	}	301	}
302	} else { /* No hint, table was printed */	302	} else { /* No hint, table was printed */
303	printf("%s> ", prompt);	303	printf("%s> ", prompt);
304	for (i=0; i<curlen;i++)	304	for (i=0; i<curlen;i++)
305	putchar(current[i]);	305	putchar(current[i]);
306	position += strlen(tmp);	306	position += strlen(tmp);
307	}	307	}
308	rdln_print_c('\b', curlen-position);	308	rdln_print_c('\b', curlen-position);
309	continue;	309	continue;
310	}	310	}
311	if (c == 0x1b) { /* Special command */	311	if (c == 0x1b) { /* Special command */
312	mod = _getc(input);	312	mod = _getc(input);
313	c = _getc(input);	313	c = _getc(input);
314		314
315	if (mod != 0x5b && mod != 0x4f)	315	if (mod != 0x5b && mod != 0x4f)
316	continue;	316	continue;
317		317
318	if (c == 0x33 && _getc(input) == 0x7e) {	318	if (c == 0x33 && _getc(input) == 0x7e) {
319	/* Delete */	319	/* Delete */
320	if (position == curlen)	320	if (position == curlen)
321	continue;	321	continue;
322	for (i=position+1; i<curlen;i++) {	322	for (i=position+1; i<curlen;i++) {
323	putchar(current[i]);	323	putchar(current[i]);
324	current[i-1] = current[i];	324	current[i-1] = current[i];
325	}	325	}
326	putchar(' ');	326	putchar(' ');
327	rdln_print_c('\b',curlen-position);	327	rdln_print_c('\b',curlen-position);
328	curlen--;	328	curlen--;
329	}	329	}
330	else if (c == 0x48) { /* Home */	330	else if (c == 0x48) { /* Home */
331	rdln_print_c('\b',position);	331	rdln_print_c('\b',position);
332	position = 0;	332	position = 0;
333	}	333	}
334	else if (c == 0x46) { /* End */	334	else if (c == 0x46) { /* End */
335	for (i=position;i<curlen;i++)	335	for (i=position;i<curlen;i++)
336	putchar(current[i]);	336	putchar(current[i]);
337	position = curlen;	337	position = curlen;
338	}	338	}
339	else if (c == 0x44) { /* Left */	339	else if (c == 0x44) { /* Left */
340	if (position > 0) {	340	if (position > 0) {
341	putchar('\b');	341	putchar('\b');
342	position--;	342	position--;
343	}	343	}
344	continue;	344	continue;
345	}	345	}
346	else if (c == 0x43) { /* Right */	346	else if (c == 0x43) { /* Right */
347	if (position < curlen) {	347	if (position < curlen) {
348	putchar(current[position]);	348	putchar(current[position]);
349	position++;	349	position++;
350	}	350	}
351	continue;	351	continue;
352	}	352	}
353	else if (c == 0x41 \|\| c == 0x42) {	353	else if (c == 0x41 \|\| c == 0x42) {
354	/* Up,down */	354	/* Up,down */
355	rdln_print_c('\b',position);	355	rdln_print_c('\b',position);
356	rdln_print_c(' ',curlen);	356	rdln_print_c(' ',curlen);
357	rdln_print_c('\b',curlen);	357	rdln_print_c('\b',curlen);
358	if (c == 0x41) /* Up */	358	if (c == 0x41) /* Up */
359	histposition--;	359	histposition--;
360	else	360	else
361	histposition++;	361	histposition++;
362	if (histposition < 0)	362	if (histposition < 0)
363	histposition = KCONSOLE_HISTORY -1 ;	363	histposition = KCONSOLE_HISTORY -1 ;
364	else	364	else
365	histposition = histposition % KCONSOLE_HISTORY;	365	histposition = histposition % KCONSOLE_HISTORY;
366	current = history[histposition];	366	current = history[histposition];
367	printf("%s", current);	367	printf("%s", current);
368	curlen = strlen(current);	368	curlen = strlen(current);
369	position = curlen;	369	position = curlen;
370	continue;	370	continue;
371	}	371	}
372	continue;	372	continue;
373	}	373	}
374	if (curlen >= MAX_CMDLINE)	374	if (curlen >= MAX_CMDLINE)
375	continue;	375	continue;
376		376
377	insert_char(current, c, position);	377	insert_char(current, c, position);
378		378
379	curlen++;	379	curlen++;
380	for (i=position;i<curlen;i++)	380	for (i=position;i<curlen;i++)
381	putchar(current[i]);	381	putchar(current[i]);
382	position++;	382	position++;
383	rdln_print_c('\b',curlen-position);	383	rdln_print_c('\b',curlen-position);
384	}	384	}
385	if (curlen) {	385	if (curlen) {
386	histposition++;	386	histposition++;
387	histposition = histposition % KCONSOLE_HISTORY;	387	histposition = histposition % KCONSOLE_HISTORY;
388	}	388	}
389	current[curlen] = '\0';	389	current[curlen] = '\0';
390	return current;	390	return current;
391	}	391	}
392		392
393	/** Kernel console managing thread.	393	/** Kernel console managing thread.
394	*	394	*
395	* @param arg Not used.	395	* @param arg Not used.
396	*/	396	*/
397	void kconsole(void *prompt)	397	void kconsole(void *prompt)
398	{	398	{
399	cmd_info_t *cmd_info;	399	cmd_info_t *cmd_info;
400	count_t len;	400	count_t len;
401	char *cmdline;	401	char *cmdline;
402		402
403	if (!stdin) {	403	if (!stdin) {
404	printf("%s: no stdin\n", __FUNCTION__);	404	printf("%s: no stdin\n", __FUNCTION__);
405	return;	405	return;
406	}	406	}
407		407
408	while (true) {	408	while (true) {
409	cmdline = clever_readline(prompt, stdin);	409	cmdline = clever_readline(prompt, stdin);
410	len = strlen(cmdline);	410	len = strlen(cmdline);
411	if (!len)	411	if (!len)
412	continue;	412	continue;
413	cmd_info = parse_cmdline(cmdline, len);	413	cmd_info = parse_cmdline(cmdline, len);
414	if (!cmd_info)	414	if (!cmd_info)
415	continue;	415	continue;
416	if (strncmp(cmd_info->name,"exit", \	416	if (strncmp(cmd_info->name,"exit", \
417	min(strlen(cmd_info->name),5)) == 0)	417	min(strlen(cmd_info->name),5)) == 0)
418	break;	418	break;
419	(void) cmd_info->func(cmd_info->argv);	419	(void) cmd_info->func(cmd_info->argv);
420	}	420	}
421	}	421	}
422		422
423	static int parse_int_arg(char text, size_t len, __native result)	423	static int parse_int_arg(char text, size_t len, __native result)
424	{	424	{
425	char symname[MAX_SYMBOL_NAME];	425	char symname[MAX_SYMBOL_NAME];
426	__address symaddr;	426	__address symaddr;
427	bool isaddr = false;	427	bool isaddr = false;
428	bool isptr = false;	428	bool isptr = false;
429		429
430	/* If we get a name, try to find it in symbol table */	430	/* If we get a name, try to find it in symbol table */
431	if (text[0] < '0' \|\| text[0] > '9') {	431	if (text[0] < '0' \|\| text[0] > '9') {
432	if (text[0] == '&') {	432	if (text[0] == '&') {
433	isaddr = true;	433	isaddr = true;
434	text++;len--;	434	text++;len--;
435	} else if (text[0] == '*') {	435	} else if (text[0] == '*') {
436	isptr = true;	436	isptr = true;
437	text++;len--;	437	text++;len--;
438	}	438	}
439	strncpy(symname, text, min(len+1, MAX_SYMBOL_NAME));	439	strncpy(symname, text, min(len+1, MAX_SYMBOL_NAME));
440	symaddr = get_symbol_addr(symname);	440	symaddr = get_symbol_addr(symname);
441	if (!symaddr) {	441	if (!symaddr) {
442	printf("Symbol %s not found.\n",symname);	442	printf("Symbol %s not found.\n",symname);
443	return -1;	443	return -1;
444	}	444	}
445	if (symaddr == (__address) -1) {	445	if (symaddr == (__address) -1) {
446	printf("Duplicate symbol %s.\n",symname);	446	printf("Duplicate symbol %s.\n",symname);
447	symtab_print_search(symname);	447	symtab_print_search(symname);
448	return -1;	448	return -1;
449	}	449	}
450	if (isaddr)	450	if (isaddr)
451	*result = (__native)symaddr;	451	*result = (__native)symaddr;
452	else if (isptr)	452	else if (isptr)
453	result = ((__native *)symaddr);	453	result = ((__native *)symaddr);
454	else	454	else
455	result = ((__native *)symaddr);	455	result = ((__native *)symaddr);
456	} else /* It's a number - convert it */	456	} else /* It's a number - convert it */
457	*result = atoi(text);	457	*result = atoi(text);
458	return 0;	458	return 0;
459	}	459	}
460		460
461	/** Parse command line.	461	/** Parse command line.
462	*	462	*
463	* @param cmdline Command line as read from input device.	463	* @param cmdline Command line as read from input device.
464	* @param len Command line length.	464	* @param len Command line length.
465	*	465	*
466	* @return Structure describing the command.	466	* @return Structure describing the command.
467	*/	467	*/
468	cmd_info_t parse_cmdline(char cmdline, size_t len)	468	cmd_info_t parse_cmdline(char cmdline, size_t len)
469	{	469	{
470	index_t start = 0, end = 0;	470	index_t start = 0, end = 0;
471	cmd_info_t *cmd = NULL;	471	cmd_info_t *cmd = NULL;
472	link_t *cur;	472	link_t *cur;
473	int i;	473	int i;
474	int error = 0;	474	int error = 0;
475		475
476	if (!parse_argument(cmdline, len, &start, &end)) {	476	if (!parse_argument(cmdline, len, &start, &end)) {
477	/* Command line did not contain alphanumeric word. */	477	/* Command line did not contain alphanumeric word. */
478	return NULL;	478	return NULL;
479	}	479	}
480		480
481	spinlock_lock(&cmd_lock);	481	spinlock_lock(&cmd_lock);
482		482
483	for (cur = cmd_head.next; cur != &cmd_head; cur = cur->next) {	483	for (cur = cmd_head.next; cur != &cmd_head; cur = cur->next) {
484	cmd_info_t *hlp;	484	cmd_info_t *hlp;
485		485
486	hlp = list_get_instance(cur, cmd_info_t, link);	486	hlp = list_get_instance(cur, cmd_info_t, link);
487	spinlock_lock(&hlp->lock);	487	spinlock_lock(&hlp->lock);
488		488
489	if (strncmp(hlp->name, &cmdline[start], max(strlen(hlp->name),	489	if (strncmp(hlp->name, &cmdline[start], max(strlen(hlp->name),
490	end-start+1)) == 0) {	490	end-start+1)) == 0) {
491	cmd = hlp;	491	cmd = hlp;
492	break;	492	break;
493	}	493	}
494		494
495	spinlock_unlock(&hlp->lock);	495	spinlock_unlock(&hlp->lock);
496	}	496	}
497		497
498	spinlock_unlock(&cmd_lock);	498	spinlock_unlock(&cmd_lock);
499		499
500	if (!cmd) {	500	if (!cmd) {

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/generic/src/console/kconsole.c – Rev 668 → 788