| /* 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_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; |
| |
| applet_name=argv[0]; |
| if (*applet_name == '-') applet_name++; |
| for (s = applet_name; *s ;) |
| if (*(s++) == '/') applet_name = s; |
| |
| /* 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) |
| { |
| /* |
| * 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) { |
| applet_name = argv[2]; |
| run_applet_by_name(applet_name, 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" |
| "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); |
| 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"); |
| } |