Prex Home / Browse Source - Prex Version: 0.9.0

root/usr/test/kmon/kmon.c

DEFINITIONS

1. parse_line
2. read_line
3. main

   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  */
  30 /*
  31  * kmon.c - main routine for kernel monitor
  32  */
  34 #include <sys/prex.h>
  35 #include <sys/keycode.h>
  36 #include <ctype.h>
  37 #include <stdio.h>
  38 #include <limits.h>
  40 #define ARGMAX          32
  42 extern int dispatch_cmd(int argc, char **args);
  44 /*
  45  * Parse an entire given line.
  46  */
  47 static int
parse_line(char *line)
  49 {
  50         static char *args[ARGMAX];
  51         char *p, *word = NULL;
  52         int argc = 0;
  53         int rc = 0;
  55         if (line[0] != ' ' && line[0] != '\t')
word = line;
p = line;
  59         while (*p) {
  60                 if (word == NULL) {
  61                         /* Skip white space. */
  62                         if (*p != ' ' && *p != '\t')
word = p;
  64                 } else {
  65                         if (*p == ' ' || *p == '\t') {
  66                                 *p = '\0';
args[argc++] = word;
word = NULL;
  69                                 if (argc >= ARGMAX - 1) {
printf("Too many args\n");
  71                                         return 0;
  72                                 }
  73                         }
  74                 }
p++;
  76         }
  77         if (word)
args[argc++] = word;
args[argc] = NULL;
  81         if (argc) {
  82                 if (dispatch_cmd(argc, args))
rc = 1;
  84         }
  85         return rc;
  86 }
  88 static void
read_line(char *line)
  90 {
  91         int c, len = 0;
  92         char *p = line;
  94         for (;;) {
c = getchar();
  96                 if (c == '\n' || len > LINE_MAX) {
  97                         *p = '\0';
  98                         return;
  99                 }
 100                 *p = (char)c;
p++;
len++;
 103         }
 104 }
 106 int
main(int argc, char *argv[])
 108 {
 109         static char line[LINE_MAX];
printf("Prex kernel monitor - type 'help' to list commands\n");
 113         for (;;) {
printf("[kmon]$ ");
read_line(line);
 116                 if (parse_line(line))
 117                         break;
 118         }
 119         return 0;
 120 }