147 lines
3.8 KiB
C
147 lines
3.8 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* BusyBox' main applet dispatcher.
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*
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* Licensed under GPLv2, see file LICENSE in this tarball for details.
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*/
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#include "busybox.h"
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const char *applet_name ATTRIBUTE_EXTERNALLY_VISIBLE;
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#ifdef CONFIG_FEATURE_INSTALLER
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/*
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* directory table
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* this should be consistent w/ the enum, busybox.h::Location,
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* or else...
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*/
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static const char usr_bin [] = "/usr/bin";
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static const char usr_sbin[] = "/usr/sbin";
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static const char* const install_dir[] = {
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&usr_bin [8], /* "", equivalent to "/" for concat_path_file() */
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&usr_bin [4], /* "/bin" */
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&usr_sbin[4], /* "/sbin" */
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usr_bin,
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usr_sbin
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};
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/* abstract link() */
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typedef int (*link_func)(const char *, const char *);
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/* create (sym)links for each applet */
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static void install_links(const char *busybox, int use_symbolic_links)
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{
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link_func lf = link;
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char *fpc;
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int i;
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int rc;
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if (use_symbolic_links)
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lf = symlink;
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for (i = 0; applets[i].name != NULL; i++) {
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fpc = concat_path_file(
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install_dir[applets[i].location],
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applets[i].name);
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rc = lf(busybox, fpc);
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if (rc != 0 && errno != EEXIST) {
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bb_perror_msg("%s", fpc);
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}
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free(fpc);
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}
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}
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#else
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#define install_links(x,y)
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#endif /* CONFIG_FEATURE_INSTALLER */
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int main(int argc, char **argv)
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{
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const char *s;
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applet_name = argv[0];
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if (*applet_name == '-')
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applet_name++;
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while ((s = strchr(applet_name, '/')))
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applet_name = s + 1;
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/* Set locale for everybody except 'init' */
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if (ENABLE_LOCALE_SUPPORT && getpid() != 1)
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setlocale(LC_ALL, "");
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run_applet_by_name(applet_name, argc, argv);
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bb_error_msg_and_die("applet not found");
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}
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int busybox_main(int argc, char **argv)
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{
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/*
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* This style of argument parsing doesn't scale well
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* in the event that busybox starts wanting more --options.
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* If someone has a cleaner approach, by all means implement it.
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*/
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if (ENABLE_FEATURE_INSTALLER && argc > 1 && !strcmp(argv[1], "--install")) {
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int use_symbolic_links = 0;
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char *busybox;
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/* to use symlinks, or not to use symlinks... */
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if (argc > 2)
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if (strcmp(argv[2], "-s") == 0)
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use_symbolic_links = 1;
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/* link */
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// XXX: FIXME: this is broken. Why not just use argv[0] ?
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busybox = xreadlink("/proc/self/exe");
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if (!busybox)
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return 1;
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install_links(busybox, use_symbolic_links);
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if (ENABLE_FEATURE_CLEAN_UP)
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free(busybox);
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return 0;
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}
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/* Deal with --help. (Also print help when called with no arguments) */
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if (argc == 1 || !strcmp(argv[1], "--help") ) {
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if (argc > 2) {
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applet_name = argv[2];
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run_applet_by_name(applet_name, 2, argv);
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} else {
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const struct BB_applet *a;
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int col, output_width;
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output_width = 80 - sizeof("start-stop-daemon, ") - 8;
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if (ENABLE_FEATURE_AUTOWIDTH) {
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/* Obtain the terminal width. */
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get_terminal_width_height(0, &output_width, NULL);
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/* leading tab and room to wrap */
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output_width -= sizeof("start-stop-daemon, ") + 8;
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}
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printf("%s\n"
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"Copyright (C) 1998-2006 Erik Andersen, Rob Landley, and others.\n"
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"Licensed under GPLv2. See source distribution for full notice.\n\n"
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"Usage: busybox [function] [arguments]...\n"
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" or: [function] [arguments]...\n\n"
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"\tBusyBox is a multi-call binary that combines many common Unix\n"
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"\tutilities into a single executable. Most people will create a\n"
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"\tlink to busybox for each function they wish to use and BusyBox\n"
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"\twill act like whatever it was invoked as!\n"
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"\nCurrently defined functions:\n", bb_msg_full_version);
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col = 0;
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for (a = applets; a->name;) {
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col += printf("%s%s", (col ? ", " : "\t"), a->name);
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a++;
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if (col > output_width && a->name) {
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puts(",");
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col = 0;
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}
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}
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puts("\n");
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return 0;
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}
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} else run_applet_by_name(argv[1], argc - 1, argv + 1);
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bb_error_msg_and_die("applet not found");
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}
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