/* vi: set sw=4 ts=4: */ /* * BusyBox' main applet dispatcher. * * Licensed under GPLv2, see file LICENSE in this tarball for details. */ #include "busybox.h" const char *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_func)(const char *, const char *); /* create (sym)links for each applet */ static void install_links(const char *busybox, int use_symbolic_links) { link_func lf = link; char *fpc; int i; int rc; if (use_symbolic_links) lf = symlink; for (i = 0; applets[i].name != NULL; i++) { fpc = concat_path_file( install_dir[applets[i].location], applets[i].name); rc = lf(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; applet_name = argv[0]; if (*applet_name == '-') applet_name++; while ((s = strchr(applet_name, '/'))) applet_name = s + 1; /* Set locale for everybody except 'init' */ if (ENABLE_LOCALE_SUPPORT && getpid() != 1) setlocale(LC_ALL, ""); run_applet_by_name(applet_name, argc, argv); bb_error_msg_and_die("applet not found"); } int busybox_main(int argc, char **argv); 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; char *busybox; /* to use symlinks, or not to use symlinks... */ if (argc > 2) if (strcmp(argv[2], "-s") == 0) use_symbolic_links = 1; /* link */ // XXX: FIXME: this is broken. Why not just use argv[0] ? busybox = xmalloc_readlink_or_warn("/proc/self/exe"); if (!busybox) return 1; install_links(busybox, use_symbolic_links); if (ENABLE_FEATURE_CLEAN_UP) free(busybox); return 0; } /* Deal with --help. (Also print help when called with no arguments) */ if (argc == 1 || !strcmp(argv[1], "--help") ) { if (argc > 2) { applet_name = argv[2]; run_applet_by_name(applet_name, 2, argv); } else { const struct BB_applet *a; int col, output_width; output_width = 80 - sizeof("start-stop-daemon, ") - 8; if (ENABLE_FEATURE_AUTOWIDTH) { /* Obtain the terminal width. */ get_terminal_width_height(0, &output_width, NULL); /* leading tab and room to wrap */ output_width -= sizeof("start-stop-daemon, ") + 8; } printf("%s\n" "Copyright (C) 1998-2006  Erik Andersen, Rob Landley, and others.\n" "Licensed under GPLv2.  See source distribution for full notice.\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); a++; if (col > output_width && a->name) { puts(","); col = 0; } } puts("\n"); return 0; } } else run_applet_by_name(argv[1], argc - 1, argv + 1); bb_error_msg_and_die("applet not found"); }