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/* vi: set sw=4 ts=4: */
/*
* Utility routines.
*
* Copyright (C) tons of folks. Tracking down who wrote what
* isn't something I'm going to worry about... If you wrote something
* here, please feel free to acknowledge your work.
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Based in part on code from sash, Copyright (c) 1999 by David I. Bell
* Permission has been granted to redistribute this code under the GPL.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "busybox.h"
#undef APPLET
#undef APPLET_NOUSAGE
#undef PROTOTYPES
#include "applets.h"
struct BB_applet *applet_using;
/* The -1 arises because of the {0,NULL,0,-1} entry above. */
const size_t NUM_APPLETS = (sizeof (applets) / sizeof (struct BB_applet) - 1);
extern void show_usage(void)
{
const char *format_string;
const char *usage_string = usage_messages;
int i;
/* From busybox.c */
extern int been_there_done_that;
if (strcmp(applet_using->name, "busybox")==0) {
been_there_done_that=1;
busybox_main(0, NULL);
}
for (i = applet_using - applets; i > 0; ) {
if (!*usage_string++) {
--i;
}
}
format_string = "%s\n\nUsage: %s %s\n\n";
if(*usage_string == 0)
format_string = "%s\n\nNo help available.\n\n";
fprintf(stderr, format_string,
full_version, applet_using->name, usage_string);
exit(EXIT_FAILURE);
}
static int applet_name_compare(const void *x, const void *y)
{
const char *name = x;
const struct BB_applet *applet = y;
return strcmp(name, applet->name);
}
extern const size_t NUM_APPLETS;
struct BB_applet *find_applet_by_name(const char *name)
{
return bsearch(name, applets, NUM_APPLETS, sizeof(struct BB_applet),
applet_name_compare);
}
void run_applet_by_name(const char *name, int argc, char **argv)
{
static int recurse_level = 0;
recurse_level++;
/* Do a binary search to find the applet entry given the name. */
if ((applet_using = find_applet_by_name(name)) != NULL) {
applet_name = applet_using->name;
if (argv[1] && strcmp(argv[1], "--help") == 0) {
show_usage();
}
exit((*(applet_using->main)) (argc, argv));
}
/* Just in case they have renamed busybox - Check argv[1] */
if (recurse_level == 1) {
run_applet_by_name("busybox", argc, argv);
}
recurse_level--;
}
/* END CODE */
/*
Local Variables:
c-file-style: "linux"
c-basic-offset: 4
tab-width: 4
End:
*/
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