Subversion Repositories HelenOS

Rev

Rev 3346 | Rev 3372 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
3265 post 1 
/* Copyright (c) 2008, Tim Post <tinkertim@gmail.com>
2 
 * All rights reserved.
3 
 * Copyright (c) 2008, Jiri Svoboda - 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 are met:
7 
 *
8 
 * Redistributions of source code must retain the above copyright notice, this
9 
 * list of conditions and the following disclaimer.
10 
 *
11 
 * Redistributions in binary form must reproduce the above copyright notice,
12 
 * this list of conditions and the following disclaimer in the documentation
13 
 * and/or other materials provided with the distribution.
14 
 *
15 
 * Neither the name of the original program's authors nor the names of its
16 
 * contributors may be used to endorse or promote products derived from this
17 
 * software without specific prior written permission.
18 
 *
19 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
20 
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
23 
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 
 * POSSIBILITY OF SUCH DAMAGE.
30 
 */
31 
 
32 
#include <stdio.h>
33 
#include <stdlib.h>
34 
#include <string.h>
35 
#include <io/stream.h>
36 
 
37 
#include "config.h"
38 
#include "util.h"
39 
#include "scli.h"
40 
#include "input.h"
41 
#include "errors.h"
42 
#include "exec.h"
43 
 
44 
extern volatile unsigned int cli_interactive;
45 
 
46 
/* More than a macro than anything */
47 
void cli_restricted(char *cmd)
48 
{
3366 post 49 
    printf("%s is not available in %s mode\n", cmd,
3265 post 50 
        cli_interactive ? "interactive" : "non-interactive");
51 
 
52 
    return;
53 
}
54 
 
55 
/* Tokenizes input from console, sees if the first word is a built-in, if so
56 
 * invokes the built-in entry point (a[0]) passing all arguments in a[] to
57 
 * the handler */
58 
int tok_input(cliuser_t *usr)
59 
{
60 
    char *cmd[WORD_MAX];
61 
    int n = 0, i = 0;
62 
    int rc = 0;
3269 post 63 
    char *tmp;
3265 post 64 
 
3269 post 65 
    if (NULL == usr->line)
66 
        return CL_EFAIL;
3265 post 67 
 
3268 post 68 
    tmp = cli_strdup(usr->line);
3275 post 69 
 
3265 post 70 
    /* Break up what the user typed, space delimited */
3339 post 71 
 
72 
    /* TODO: Protect things in quotes / ticks, expand wildcards */
3265 post 73 
    cmd[n] = cli_strtok(tmp, " ");
74 
    while (cmd[n] && n < WORD_MAX) {
75 
        cmd[++n] = cli_strtok(NULL, " ");
76 
    }
77 
 
78 
    /* We have rubbish */
79 
    if (NULL == cmd[0]) {
80 
        rc = CL_ENOENT;
81 
        goto finit;
82 
    }
83 
 
3339 post 84 
    /* Check what kind of command argv[0] might be, TODO: move this to
85 
     * a function */
3265 post 86 
    if ((i = (is_builtin(cmd[0]))) > -1) {
87 
        if (builtin_is_restricted(i)) {
88 
                rc = try_exec(cmd[0], cmd);
89 
                if (rc)
90 
                    cli_restricted(cmd[0]);
91 
                goto finit;
92 
        }
93 
        rc = run_builtin(i, cmd, usr);
94 
        goto finit;
95 
    } else if ((i = (is_module(cmd[0]))) > -1) {
96 
        if (module_is_restricted(i)) {
97 
            rc = try_exec(cmd[0], cmd);
98 
            if (rc)
99 
                cli_restricted(cmd[0]);
100 
            goto finit;
101 
        }
102 
        rc = run_module(i, cmd);
103 
        goto finit;
104 
    } else {
105 
        rc = try_exec(cmd[0], cmd);
106 
        goto finit;
107 
    }
108 
 
109 
finit:
110 
    if (NULL != usr->line) {
111 
        free(usr->line);
112 
        usr->line = (char *) NULL;
113 
    }
3268 post 114 
    if (NULL != tmp)
115 
        free(tmp);
3275 post 116 
 
3265 post 117 
    return rc;
118 
}
119 
 
120 
/* Borrowed from Jiri Svoboda's 'cli' uspace app */
121 
void read_line(char *buffer, int n)
122 
{
123 
    char c;
124 
    int chars;
125 
 
126 
    chars = 0;
127 
    while (chars < n - 1) {
128 
        c = getchar();
129 
        if (c < 0)
130 
            return;
131 
        if (c == '\n')
132 
            break;
133 
        if (c == '\b') {
134 
            if (chars > 0) {
135 
                putchar('\b');
136 
                --chars;
137 
            }
138 
            continue;
139 
        }
140 
        putchar(c);
141 
        buffer[chars++] = c;
142 
    }
143 
    putchar('\n');
144 
    buffer[chars] = '\0';
145 
}
146 
 
147 
void get_input(cliuser_t *usr)
148 
{
149 
    char line[INPUT_MAX];
150 
    size_t len = 0;
151 
 
152 
    printf("%s", usr->prompt);
153 
    read_line(line, INPUT_MAX);
154 
    len = strlen(line);
155 
    /* Make sure we don't have rubbish or a C/R happy user */
3275 post 156 
    if (len == 0 || line[0] == '\n')
3265 post 157 
        return;
158 
    usr->line = cli_strdup(line);
3304 post 159 
 
3265 post 160 
    return;
161 
}
162