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/* vi: set sw=4 ts=4: */
/*
* BusyBox' main applet dispatcher.
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
#include "busybox.h"
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <stdlib.h>
#if ENABLE_LOCALE_SUPPORT
#include <locale.h>
#else
#define setlocale(x,y)
#endif
const char *bb_applet_name ATTRIBUTE_EXTERNALLY_VISIBLE;
#ifdef CONFIG_FEATURE_INSTALLER
/*
* directory table
* this should be consistent w/ the enum, busybox.h::Location,
* or else...
*/
static const char usr_bin [] ="/usr/bin";
static const char usr_sbin[] ="/usr/sbin";
static const char* const install_dir[] = {
&usr_bin [8], /* "", equivalent to "/" for concat_path_file() */
&usr_bin [4], /* "/bin" */
&usr_sbin[4], /* "/sbin" */
usr_bin,
usr_sbin
};
/* abstract link() */
typedef int (*__link_f)(const char *, const char *);
/* create (sym)links for each applet */
static void install_links(const char *busybox, int use_symbolic_links)
{
__link_f Link = link;
char *fpc;
int i;
int rc;
if (use_symbolic_links)
Link = symlink;
for (i = 0; applets[i].name != NULL; i++) {
fpc = concat_path_file(
install_dir[applets[i].location], applets[i].name);
rc = Link(busybox, fpc);
if (rc!=0 && errno!=EEXIST) {
bb_perror_msg("%s", fpc);
}
free(fpc);
}
}
#else
#define install_links(x,y)
#endif /* CONFIG_FEATURE_INSTALLER */
int main(int argc, char **argv)
{
const char *s;
bb_applet_name=argv[0];
if (*bb_applet_name == '-') bb_applet_name++;
for (s = bb_applet_name; *s ;)
if (*(s++) == '/') bb_applet_name = s;
/* Set locale for everybody except `init' */
if(ENABLE_LOCALE_SUPPORT && getpid() != 1)
setlocale(LC_ALL, "");
run_applet_by_name(bb_applet_name, argc, argv);
bb_error_msg_and_die("applet not found");
}
int busybox_main(int argc, char **argv)
{
/*
* This style of argument parsing doesn't scale well
* in the event that busybox starts wanting more --options.
* If someone has a cleaner approach, by all means implement it.
*/
if (ENABLE_FEATURE_INSTALLER && argc > 1 && !strcmp(argv[1], "--install")) {
int use_symbolic_links = 0;
int rc = 0;
char *busybox;
/* to use symlinks, or not to use symlinks... */
if (argc > 2) {
if ((strcmp(argv[2], "-s") == 0)) {
use_symbolic_links = 1;
}
}
/* link */
busybox = xreadlink("/proc/self/exe");
if (busybox) {
install_links(busybox, use_symbolic_links);
free(busybox);
} else {
rc = 1;
}
return rc;
}
/* Deal with --help. (Also print help when called with no arguments) */
if (argc==1 || !strcmp(argv[1],"--help") ) {
if (argc>2) {
run_applet_by_name(bb_applet_name=argv[2], 2, argv);
} else {
const struct BB_applet *a;
int col, output_width;
if (ENABLE_FEATURE_AUTOWIDTH) {
/* Obtain the terminal width. */
get_terminal_width_height(0, &output_width, NULL);
/* leading tab and room to wrap */
output_width -= 20;
} else output_width = 60;
printf("%s\n\n"
"Usage: busybox [function] [arguments]...\n"
" or: [function] [arguments]...\n\n"
"\tBusyBox is a multi-call binary that combines many common Unix\n"
"\tutilities into a single executable. Most people will create a\n"
"\tlink to busybox for each function they wish to use and BusyBox\n"
"\twill act like whatever it was invoked as!\n"
"\nCurrently defined functions:\n", bb_msg_full_version);
col=0;
for(a = applets; a->name;) {
col += printf("%s%s", (col ? ", " : "\t"), (a++)->name);
if (col > output_width && a->name) {
printf(",\n");
col = 0;
}
}
printf("\n\n");
exit(0);
}
} else run_applet_by_name(argv[1], argc-1, argv+1);
bb_error_msg_and_die("applet not found");
}
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