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114 lines
3.0 KiB
C
114 lines
3.0 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Utility routines.
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*
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* Copyright (C) tons of folks. Tracking down who wrote what
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* isn't something I'm going to worry about... If you wrote something
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* here, please feel free to acknowledge your work.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Based in part on code from sash, Copyright (c) 1999 by David I. Bell
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* Permission has been granted to redistribute this code under the GPL.
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "busybox.h"
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#undef APPLET
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#undef APPLET_NOUSAGE
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#undef PROTOTYPES
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#include "applets.h"
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struct BB_applet *applet_using;
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/* The -1 arises because of the {0,NULL,0,-1} entry above. */
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const size_t NUM_APPLETS = (sizeof (applets) / sizeof (struct BB_applet) - 1);
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extern void show_usage(void)
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{
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const char *format_string;
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const char *usage_string = usage_messages;
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int i;
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/* From busybox.c */
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extern int been_there_done_that;
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if (strcmp(applet_using->name, "busybox")==0) {
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been_there_done_that=1;
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busybox_main(0, NULL);
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}
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for (i = applet_using - applets; i > 0; ) {
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if (!*usage_string++) {
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--i;
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}
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}
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format_string = "%s\n\nUsage: %s %s\n\n";
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if(*usage_string == 0)
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format_string = "%s\n\nNo help available.\n\n";
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fprintf(stderr, format_string,
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full_version, applet_using->name, usage_string);
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exit(EXIT_FAILURE);
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}
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static int applet_name_compare(const void *x, const void *y)
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{
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const char *name = x;
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const struct BB_applet *applet = y;
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return strcmp(name, applet->name);
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}
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extern const size_t NUM_APPLETS;
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struct BB_applet *find_applet_by_name(const char *name)
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{
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return bsearch(name, applets, NUM_APPLETS, sizeof(struct BB_applet),
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applet_name_compare);
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}
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void run_applet_by_name(const char *name, int argc, char **argv)
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{
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static int recurse_level = 0;
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recurse_level++;
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/* Do a binary search to find the applet entry given the name. */
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if ((applet_using = find_applet_by_name(name)) != NULL) {
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applet_name = applet_using->name;
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if (argv[1] && strcmp(argv[1], "--help") == 0) {
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show_usage();
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}
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exit((*(applet_using->main)) (argc, argv));
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}
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/* Just in case they have renamed busybox - Check argv[1] */
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if (recurse_level == 1) {
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run_applet_by_name("busybox", argc, argv);
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}
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recurse_level = 0;
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}
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/* END CODE */
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/*
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Local Variables:
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c-file-style: "linux"
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c-basic-offset: 4
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tab-width: 4
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End:
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*/
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