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1.1 root 1: /*
2: * Copyright (C) 2006 Michael Brown <[email protected]>.
3: *
4: * This program is free software; you can redistribute it and/or
5: * modify it under the terms of the GNU General Public License as
6: * published by the Free Software Foundation; either version 2 of the
7: * License, or any later version.
8: *
9: * This program is distributed in the hope that it will be useful, but
10: * WITHOUT ANY WARRANTY; without even the implied warranty of
11: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12: * General Public License for more details.
13: *
14: * You should have received a copy of the GNU General Public License
15: * along with this program; if not, write to the Free Software
16: * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17: */
18:
19: FILE_LICENCE ( GPL2_OR_LATER );
20:
21: #include <stdint.h>
22: #include <stdlib.h>
23: #include <stdio.h>
24: #include <string.h>
25: #include <getopt.h>
26: #include <readline/readline.h>
27: #include <ipxe/command.h>
28: #include <ipxe/parseopt.h>
29: #include <ipxe/shell.h>
30:
31: /** @file
32: *
33: * Minimal command shell
34: *
35: */
36:
37: /** The shell prompt string */
38: static const char shell_prompt[] = "iPXE> ";
39:
40: /**
41: * "help" command
42: *
43: * @v argc Argument count
44: * @v argv Argument list
45: * @ret rc Return status code
46: */
47: static int help_exec ( int argc __unused, char **argv __unused ) {
48: struct command *command;
49: unsigned int hpos = 0;
50:
51: printf ( "\nAvailable commands:\n\n" );
52: for_each_table_entry ( command, COMMANDS ) {
53: hpos += printf ( " %s", command->name );
54: if ( hpos > ( 16 * 4 ) ) {
55: printf ( "\n" );
56: hpos = 0;
57: } else {
58: while ( hpos % 16 ) {
59: printf ( " " );
60: hpos++;
61: }
62: }
63: }
64: printf ( "\n\nType \"<command> --help\" for further information\n\n" );
65: return 0;
66: }
67:
68: /** "help" command */
69: struct command help_command __command = {
70: .name = "help",
71: .exec = help_exec,
72: };
73:
74: /**
75: * Start command shell
76: *
77: */
78: int shell ( void ) {
79: struct readline_history history;
80: char *line;
81: int rc = 0;
82:
83: /* Initialise shell history */
84: memset ( &history, 0, sizeof ( history ) );
85:
86: /* Read and execute commands */
87: do {
88: line = readline_history ( shell_prompt, &history );
89: if ( line ) {
90: rc = system ( line );
91: free ( line );
92: }
93: } while ( ! shell_stopped ( SHELL_STOP_COMMAND_SEQUENCE ) );
94:
95: /* Discard shell history */
96: history_free ( &history );
97:
98: return rc;
99: }
100:
101: /** "shell" options */
102: struct shell_options {};
103:
104: /** "shell" option list */
105: static struct option_descriptor shell_opts[] = {};
106:
107: /** "shell" command descriptor */
108: static struct command_descriptor shell_cmd =
109: COMMAND_DESC ( struct shell_options, shell_opts, 0, 0, "" );
110:
111: /**
112: * "shell" command
113: *
114: * @v argc Argument count
115: * @v argv Argument list
116: * @ret rc Return status code
117: */
118: static int shell_exec ( int argc, char **argv ) {
119: struct shell_options opts;
120: int rc;
121:
122: /* Parse options */
123: if ( ( rc = parse_options ( argc, argv, &shell_cmd, &opts ) ) != 0 )
124: return rc;
125:
126: /* Start shell */
127: if ( ( rc = shell() ) != 0 )
128: return rc;
129:
130: return 0;
131: }
132:
133: /** "shell" command */
134: struct command shell_command __command = {
135: .name = "shell",
136: .exec = shell_exec,
137: };
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