source: rtems/c/src/libmisc/monitor/mon-command.c @ 3a4ae6c

4.104.114.84.95
Last change on this file since 3a4ae6c was b06e68ef, checked in by Joel Sherrill <joel.sherrill@…>, on Aug 17, 1995 at 7:51:51 PM

Numerous miscellaneous features incorporated from Tony Bennett
(tbennett@…) including the following major additions:

+ variable length messages
+ named devices
+ debug monitor
+ association tables/variables

  • Property mode set to 100644
File size: 4.1 KB
Line 
1/*
2 *      @(#)command.c   1.5 - 95/08/02
3 *     
4 *
5 * Command parsing routines for RTEMS monitor
6 *
7 * TODO:
8 *
9 *  $Id$
10 */
11
12#include <rtems.h>
13
14#include "monitor.h"
15
16#include <stdio.h>
17#include <string.h>
18
19/*
20 * make_argv(cp): token-count
21 *      Break up the command line in 'cp' into global argv[] and argc (return
22 *      value).
23 */
24
25int
26rtems_monitor_make_argv(
27    char *cp,
28    int  *argc_p,
29    char **argv)
30{
31    int argc = 0;
32
33    while ((cp = strtok(cp, " \t\n\r")))
34    {
35        argv[argc++] = cp;
36        cp = (char *) NULL;
37    }
38    argv[argc] = (char *) NULL;                 /* end of argv */
39
40    return *argc_p = argc;
41}
42
43
44/*
45 * Read and break up a monitor command
46 *
47 * We have to loop on the gets call, since it will return NULL under UNIX
48 *  RTEMS when we get a signal (eg: SIGALRM).
49 */
50
51int
52rtems_monitor_command_read(char *command,
53                           int  *argc,
54                           char **argv)
55{
56    extern rtems_configuration_table  BSP_Configuration;
57    static char monitor_prompt[32];
58   
59    /*
60     * put node number in the prompt if we are multiprocessing
61     */
62
63    if (BSP_Configuration.User_multiprocessing_table == 0)
64        sprintf(monitor_prompt, "%s", MONITOR_PROMPT);
65    else if (rtems_monitor_default_node != rtems_monitor_node)
66        sprintf(monitor_prompt, "%d-%s-%d", rtems_monitor_node, MONITOR_PROMPT, rtems_monitor_default_node);
67    else
68        sprintf(monitor_prompt, "%d-%s", rtems_monitor_node, MONITOR_PROMPT);
69
70#ifdef RTEMS_UNIX
71    /* RTEMS on unix gets so many interrupt system calls this is hosed */
72    printf("%s> ", monitor_prompt);
73    fflush(stdout);
74    while (gets(command) == (char *) 0)
75        ;
76#else
77    do
78    {
79        printf("%s> ", monitor_prompt);
80        fflush(stdout);
81    } while (gets(command) == (char *) 0);
82#endif
83
84    return rtems_monitor_make_argv(command, argc, argv);
85}
86
87/*
88 * Look up a command in a command table
89 *
90 */
91
92rtems_monitor_command_entry_t *
93rtems_monitor_command_lookup(
94    rtems_monitor_command_entry_t *table,
95    int                            argc,
96    char                          **argv
97)
98{
99    rtems_monitor_command_entry_t *p;
100    rtems_monitor_command_entry_t *abbreviated_match = 0;
101    int abbreviated_matches = 0;
102    char *command;
103    int command_length;
104
105    command = argv[0];
106
107    if ((table == 0) || (command == 0))
108        goto failed;
109   
110    command_length = strlen(command);
111
112    for (p = table; p->command; p++)
113        if (STREQ(command, p->command))    /* exact match */
114            goto done;
115        else if (STRNEQ(command, p->command, command_length))
116        {
117            abbreviated_matches++;
118            abbreviated_match = p;
119        }
120
121    /* no perfect match; is there a non-ambigous abbreviated match? */
122    if ( ! abbreviated_match)
123    {
124        printf("Unrecognized command '%s'; try 'help'\n", command);
125        goto failed;
126    }   
127
128    if (abbreviated_matches > 1)
129    {
130        printf("Command '%s' is ambiguous; try 'help'\n", command);
131        goto failed;
132    }
133   
134    p = abbreviated_match;
135
136done:
137    if (p->command_function == 0)
138        goto failed;
139    return p;
140
141failed:
142    return 0;
143}
144
145void
146rtems_monitor_command_usage(rtems_monitor_command_entry_t *table,
147                            char *command_string)
148{
149    rtems_monitor_command_entry_t *help = 0;
150    char *help_command_argv[2];
151   
152    /* if first entry in table is a usage, then print it out */
153    if (command_string == 0)
154    {       
155        if (STREQ(table->command, "--usage--") && table->usage)
156            help = table;
157    }
158    else
159    {
160        help_command_argv[0] = command_string;
161        help_command_argv[1] = 0;
162        help = rtems_monitor_command_lookup(table, 1, help_command_argv);
163    }
164
165    if (help)
166        printf("%s\n", help->usage);
167}
168
169
170void
171rtems_monitor_help_cmd(
172    int          argc,
173    char       **argv,
174    unsigned32   command_arg,
175    boolean verbose
176)
177{
178    int arg;
179    rtems_monitor_command_entry_t *command;
180
181    command = (rtems_monitor_command_entry_t *) command_arg;
182   
183    if (argc == 1)
184        rtems_monitor_command_usage(command, 0);
185    else
186    {
187        for (arg=1; argv[arg]; arg++)
188            rtems_monitor_command_usage(command, argv[arg]);
189    }
190}
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