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Annotation of prex-old/usr/test/kmon/kmon.c, Revision 1.1

1.1     ! nbrk        1: /*
        !             2:  * Copyright (c) 2005, Kohsuke Ohtani
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms, with or without
        !             6:  * modification, are permitted provided that the following conditions
        !             7:  * are met:
        !             8:  * 1. Redistributions of source code must retain the above copyright
        !             9:  *    notice, this list of conditions and the following disclaimer.
        !            10:  * 2. Redistributions in binary form must reproduce the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer in the
        !            12:  *    documentation and/or other materials provided with the distribution.
        !            13:  * 3. Neither the name of the author nor the names of any co-contributors
        !            14:  *    may be used to endorse or promote products derived from this software
        !            15:  *    without specific prior written permission.
        !            16:  *
        !            17:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
        !            18:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            19:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            20:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
        !            21:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            22:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            23:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            24:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            25:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            26:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            27:  * SUCH DAMAGE.
        !            28:  */
        !            29:
        !            30: /*
        !            31:  * kmon.c - main routine for kernel monitor
        !            32:  */
        !            33:
        !            34: #include <prex/prex.h>
        !            35: #include <prex/keycode.h>
        !            36: #include <ctype.h>
        !            37: #include <stdio.h>
        !            38: #include <limits.h>
        !            39:
        !            40: extern int dispatch_cmd(int argc, char **arg_list);
        !            41:
        !            42: static char *arg_list[LINE_MAX];
        !            43:
        !            44: /*
        !            45:  * Read a line.
        !            46:  */
        !            47: void
        !            48: read_line(char *line)
        !            49: {
        !            50:        int c, len = 0;
        !            51:        char *p = line;
        !            52:
        !            53:        for (;;) {
        !            54:                c = getchar();
        !            55:                if (c == '\n' || len > LINE_MAX) {
        !            56:                        *p = '\0';
        !            57:                        return;
        !            58:                }
        !            59:                *p = (char)c;
        !            60:                p++;
        !            61:                len++;
        !            62:        }
        !            63: }
        !            64:
        !            65: /*
        !            66:  * Parse an entire given line.
        !            67:  */
        !            68: int
        !            69: parse_line(char *line)
        !            70: {
        !            71:        char *p = line;
        !            72:        int argc = 0;
        !            73:
        !            74:        for (;;) {
        !            75:                /* Skip space */
        !            76:                while (*p && *p == ' ')
        !            77:                        p++;
        !            78:                if (*p == 0)
        !            79:                        break;
        !            80:                arg_list[argc++] = p;
        !            81:
        !            82:                /* Skip word */
        !            83:                while (*p && *p != ' ')
        !            84:                        p++;
        !            85:                if (*p == 0)
        !            86:                        break;
        !            87:                *p++ = 0;
        !            88:        }
        !            89:        arg_list[argc] = NULL;
        !            90:        return argc;
        !            91: }
        !            92:
        !            93: int
        !            94: main(int argc, char *argv[])
        !            95: {
        !            96:        char line[LINE_MAX];
        !            97:        int c;
        !            98:
        !            99:        printf("Prex kernel monitor - type 'help' to list commands\n");
        !           100:
        !           101:        for (;;) {
        !           102:                printf("[kmon]$ ");
        !           103:                read_line(line);
        !           104:                c = parse_line(line);
        !           105:                if (c) {
        !           106:                        if (dispatch_cmd(c, arg_list))
        !           107:                                break;
        !           108:                }
        !           109:        }
        !           110:        return 0;
        !           111: }