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/*
$Id: menu.c,v 1.15 2007-04-11 10:43:27+01 taviso Exp $
Copyright (C) 2006,2007 Tavis Ormandy <taviso@sdf.lonestar.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _GNU_SOURCE
# define _GNU_SOURCE
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <string.h>
#include <stdbool.h>
#include <readline/readline.h>
#include <readline/history.h>
#include "scanmem.h"
#include "commands.h"
static char *commandgenerator(const char *text, int state);
static char **commandcompletion(const char *text, int start, int end);
/*
* getcommand() reads in a command using readline, and places a pointer to the
* read string into *line, _which must be free'd by caller_.
* returns true on success, or false on error.
*/
bool getcommand(globals_t * vars, char **line)
{
char prompt[64];
assert(vars != NULL);
assert(vars->matches != NULL);
snprintf(prompt, sizeof(prompt), "%u> ", vars->matches->size);
rl_readline_name = "scanmem";
rl_attempted_completion_function = commandcompletion;
while (true) {
/* read in the next command using readline library */
if ((*line = readline(prompt)) == NULL) {
/* EOF */
if ((*line = strdup("__eof")) == NULL) {
fprintf(stderr,
"error: sorry, there was a memory allocation error.\n");
return false;
}
}
if (strlen(*line)) {
break;
}
free(*line);
}
/* record this line to readline history */
add_history(*line);
return true;
}
/* custom completor program for readline */
static char **commandcompletion(const char *text, int start, int end)
{
(void) end;
/* never use default completer (filenames), even if I dont generate any matches */
rl_attempted_completion_over = 1;
/* only complete on the first word, the command */
return start ? NULL : rl_completion_matches(text, commandgenerator);
}
/* command generator for readline completion */
static char *commandgenerator(const char *text, int state)
{
static unsigned index = 0;
unsigned i;
size_t len;
element_t *np;
/* reset generator if state == 0, otherwise continue from last time */
index = state ? index : 0;
np = globals.commands ? globals.commands->head : NULL;
len = strlen(text);
/* skip to the last node checked */
for (i = 0; np && i < index; i++)
np = np->next;
/* traverse the commands list, checking for matches */
while (np) {
command_t *command = np->data;
np = np->next;
/* record progress */
index++;
/* if shortdoc is NULL, this is not supposed ot be user visible */
if (command == NULL || command->command == NULL
|| command->shortdoc == NULL)
continue;
/* check if we have a match */
if (strncmp(text, command->command, len) == 0) {
return strdup(command->command);
}
}
return NULL;
}
int printversion(FILE * fp)
{
return fprintf(fp, "scanmem version %s, Copyright (C) 2006-2007 Tavis Ormandy\n"
"scanmem comes with ABSOLUTELY NO WARRANTY; for details type `show warranty'.\n"
"This is free software, and you are welcome to redistribute it\n"
"under certain conditions; type `show copying' for details.\n\n", PACKAGE_VERSION);
}
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