1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
5 * part of this file is taken from libcli (libcli.sourceforge.net) *
6 * Copyright (C) David Parrish (david@dparrish.com) *
8 * This program is free software; you can redistribute it and/or modify *
9 * it under the terms of the GNU General Public License as published by *
10 * the Free Software Foundation; either version 2 of the License, or *
11 * (at your option) any later version. *
13 * This program is distributed in the hope that it will be useful, *
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16 * GNU General Public License for more details. *
18 * You should have received a copy of the GNU General Public License *
19 * along with this program; if not, write to the *
20 * Free Software Foundation, Inc., *
21 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
22 ***************************************************************************/
27 #include "replacements.h"
32 #include "time_support.h"
41 void command_print_help_line(command_context_t
* context
, struct command_s
*command
, int indent
);
43 int handle_sleep_command(struct command_context_s
*cmd_ctx
, char *cmd
, char **args
, int argc
);
44 int handle_time_command(struct command_context_s
*cmd_ctx
, char *cmd
, char **args
, int argc
);
46 int build_unique_lengths(command_context_t
*context
, command_t
*commands
)
50 /* iterate through all commands */
51 for (c
= commands
; c
; c
= c
->next
)
53 /* find out how many characters are required to uniquely identify a command */
54 for (c
->unique_len
= 1; c
->unique_len
<= strlen(c
->name
); c
->unique_len
++)
58 /* for every command, see if the current length is enough */
59 for (p
= commands
; p
; p
= p
->next
)
61 /* ignore the command itself */
65 /* compare commands up to the current length */
66 if (strncmp(p
->name
, c
->name
, c
->unique_len
) == 0)
70 /* when none of the commands matched, we've found the minimum length required */
75 /* if the current command has children, build the unique lengths for them */
77 build_unique_lengths(context
, c
->children
);
83 /* Avoid evaluating this each time we add a command. Reduces overhead from O(n^2) to O(n).
84 * Makes a difference on ARM7 types machines and is not observable on GHz machines.
86 static int unique_length_dirty
= 1;
88 command_t
* register_command(command_context_t
*context
, command_t
*parent
, char *name
, int (*handler
)(struct command_context_s
*context
, char* name
, char** args
, int argc
), enum command_mode mode
, char *help
)
91 unique_length_dirty
= 1;
93 if (!context
|| !name
)
96 c
= malloc(sizeof(command_t
));
98 c
->name
= strdup(name
);
101 c
->handler
= handler
;
104 c
->help
= strdup(help
);
110 /* place command in tree */
113 if (parent
->children
)
115 /* find last child */
116 for (p
= parent
->children
; p
&& p
->next
; p
= p
->next
);
122 parent
->children
= c
;
127 if (context
->commands
)
129 /* find last command */
130 for (p
= context
->commands
; p
&& p
->next
; p
= p
->next
);
136 context
->commands
= c
;
143 int unregister_command(command_context_t
*context
, char *name
)
145 unique_length_dirty
= 1;
147 command_t
*c
, *p
= NULL
, *c2
;
149 if ((!context
) || (!name
))
150 return ERROR_INVALID_ARGUMENTS
;
153 for (c
= context
->commands
; c
; c
= c
->next
)
155 if (strcmp(name
, c
->name
) == 0)
164 context
->commands
= c
->next
;
167 /* unregister children */
170 for (c2
= c
->children
; c2
; c2
= c2
->next
)
186 /* remember the last command for unlinking */
193 int parse_line(char *line
, char *words
[], int max_words
)
197 char *word_start
= line
;
200 while (nwords
< max_words
- 1)
202 /* check if we reached
204 * a matching closing quote character " or '
205 * we're inside a word but not a quote, and the current character is whitespace
207 if (!*p
|| *p
== inquote
|| (word_start
&& !inquote
&& isspace(*p
)))
209 /* we're inside a word or quote, and reached its end*/
215 /* This will handle extra whitespace within quotes */
216 while (isspace(*word_start
)&&(word_start
<word_end
))
218 while (isspace(*(word_end
-1))&&(word_start
<word_end
))
220 len
= word_end
- word_start
;
225 memcpy(words
[nwords
] = malloc(len
+ 1), word_start
, len
);
226 /* add terminating NUL */
227 words
[nwords
++][len
] = 0;
230 /* we're done parsing the line */
234 /* skip over trailing quote or whitespace*/
235 if (inquote
|| isspace(*p
))
243 else if (*p
== '"' || *p
== '\'')
245 /* we've reached the beginning of a quote */
251 /* we've reached the beginning of a new word */
255 /* normal character, skip */
263 static void command_printv(command_context_t
*context
, char *format
, va_list ap
)
269 /* process format string */
272 if (!buffer
|| (n
= vsnprintf(buffer
, size
, format
, ap
)) >= size
)
274 /* increase buffer until it fits the whole string */
275 if (!(p
= realloc(buffer
, size
+= 4096)))
290 /* vsnprintf failed */
298 context
->output_handler(context
, buffer
);
304 void command_print_sameline(command_context_t
*context
, char *format
, ...)
307 va_start(ap
, format
);
308 command_printv(context
, format
, ap
);
312 void command_print(command_context_t
*context
, char *format
, ...)
314 char *t
=malloc(strlen(format
)+2);
318 va_start(ap
, format
);
319 command_printv(context
, t
, ap
);
325 int find_and_run_command(command_context_t
*context
, command_t
*commands
, char *words
[], int num_words
, int start_word
)
329 if (unique_length_dirty
)
331 unique_length_dirty
= 0;
332 /* update unique lengths */
333 build_unique_lengths(context
, context
->commands
);
336 for (c
= commands
; c
; c
= c
->next
)
338 if (strncasecmp(c
->name
, words
[start_word
], c
->unique_len
))
341 if (strncasecmp(c
->name
, words
[start_word
], strlen(words
[start_word
])))
344 if ((context
->mode
== COMMAND_CONFIG
) || (c
->mode
== COMMAND_ANY
) || (c
->mode
== context
->mode
) )
350 command_print(context
, "No handler for command");
355 int retval
= c
->handler(context
, c
->name
, words
+ start_word
+ 1, num_words
- start_word
- 1);
356 if (retval
== ERROR_COMMAND_SYNTAX_ERROR
)
358 command_print(context
, "Syntax error:");
359 command_print_help_line(context
, c
, 0);
366 if (start_word
== num_words
- 1)
368 command_print(context
, "Incomplete command");
371 return find_and_run_command(context
, c
->children
, words
, num_words
, start_word
+ 1);
376 command_print(context
, "Command %s not found", words
[start_word
]);
380 int command_run_line(command_context_t
*context
, char *line
)
383 char *words
[128] = {0};
387 if ((!context
) || (!line
))
388 return ERROR_INVALID_ARGUMENTS
;
390 /* skip preceding whitespace */
391 while (isspace(*line
))
394 /* empty line, ignore */
398 /* ignore comments */
399 if (*line
&& (line
[0] == '#'))
404 nwords
= parse_line(line
, words
, sizeof(words
) / sizeof(words
[0]));
407 retval
= find_and_run_command(context
, context
->commands
, words
, nwords
, 0);
409 return ERROR_INVALID_ARGUMENTS
;
411 for (i
= 0; i
< nwords
; i
++)
417 int command_run_file(command_context_t
*context
, FILE *file
, enum command_mode mode
)
419 int retval
= ERROR_OK
;
420 int old_command_mode
;
421 char *buffer
=malloc(4096);
424 return ERROR_INVALID_ARGUMENTS
;
427 old_command_mode
= context
->mode
;
428 context
->mode
= mode
;
430 while (fgets(buffer
, 4096, file
))
435 /* stop processing line after a comment (#, !) or a LF, CR were encountered */
436 if ((p
= strpbrk(buffer
, "#!\r\n")))
439 /* skip over leading whitespace */
441 while (isspace(*cmd
))
444 /* empty (all whitespace) line? */
448 /* search the end of the current line, ignore trailing whitespace */
449 for (p
= end
= cmd
; *p
; p
++)
455 if (strcasecmp(cmd
, "quit") == 0)
459 if ((retval
= command_run_line(context
, cmd
)) == ERROR_COMMAND_CLOSE_CONNECTION
)
463 context
->mode
= old_command_mode
;
471 void command_print_help_line(command_context_t
* context
, struct command_s
*command
, int indent
)
474 char indent_text
[indent
+ 2];
475 char *help
= "no help available";
481 indent_text
[0] = ' ';
482 memset(indent_text
+ 1, '-', indent
);
483 indent_text
[indent
+ 1] = 0;
487 help
= command
->help
;
489 snprintf(name_buf
, 64, command
->name
);
492 strncat(name_buf
, indent_text
, 64);
494 command_print(context
, "%20s\t%s", name_buf
, help
, indent
);
496 if (command
->children
)
498 for (c
= command
->children
; c
; c
= c
->next
)
500 command_print_help_line(context
, c
, indent
+ 1);
505 int command_print_help_match(command_context_t
* context
, command_t
* c_first
, char* name
, char** args
, int argc
)
510 for (c
= c_first
; c
; c
= c
->next
)
514 if (strncasecmp(c
->name
, args
[0], c
->unique_len
))
517 if (strncasecmp(c
->name
, args
[0], strlen(args
[0])))
522 command_print_help_match(context
, c
->children
, name
, args
+ 1, argc
- 1);
527 command_print_help_line(context
, c
, 0);
533 int command_print_help(command_context_t
* context
, char* name
, char** args
, int argc
)
535 return command_print_help_match(context
, context
->commands
, name
, args
, argc
);
539 void command_set_output_handler(command_context_t
* context
, int (*output_handler
)(struct command_context_s
*context
, char* line
), void *priv
)
541 context
->output_handler
= output_handler
;
542 context
->output_handler_priv
= priv
;
545 command_context_t
* copy_command_context(command_context_t
* context
)
547 command_context_t
* copy_context
= malloc(sizeof(command_context_t
));
549 *copy_context
= *context
;
554 int command_done(command_context_t
*context
)
562 command_context_t
* command_init()
564 command_context_t
* context
= malloc(sizeof(command_context_t
));
566 context
->mode
= COMMAND_EXEC
;
567 context
->commands
= NULL
;
568 context
->current_target
= 0;
569 context
->output_handler
= NULL
;
570 context
->output_handler_priv
= NULL
;
572 register_command(context
, NULL
, "help", command_print_help
,
573 COMMAND_EXEC
, "display this help");
575 register_command(context
, NULL
, "sleep", handle_sleep_command
,
576 COMMAND_ANY
, "sleep for <n> milliseconds");
578 register_command(context
, NULL
, "time", handle_time_command
,
579 COMMAND_ANY
, "time <cmd + args> - execute <cmd + args> and print time it took");
584 /* sleep command sleeps for <n> miliseconds
585 * this is useful in target startup scripts
587 int handle_sleep_command(struct command_context_s
*cmd_ctx
, char *cmd
, char **args
, int argc
)
589 unsigned long duration
= 0;
593 duration
= strtoul(args
[0], NULL
, 0);
594 usleep(duration
* 1000);
600 int handle_time_command(struct command_context_s
*cmd_ctx
, char *cmd
, char **args
, int argc
)
603 return ERROR_COMMAND_SYNTAX_ERROR
;
609 duration_start_measure(&duration
);
611 retval
= find_and_run_command(cmd_ctx
, cmd_ctx
->commands
, args
, argc
, 0);
613 duration_stop_measure(&duration
, &duration_text
);
615 float t
=duration
.duration
.tv_sec
;
616 t
+=((float)duration
.duration
.tv_usec
/ 1000000.0);
617 command_print(cmd_ctx
, "%s took %fs", args
[0], t
);
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