[821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * BusyBox' main applet dispatcher.
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| 4 | *
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| 5 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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| 6 | */
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| 7 | #include "busybox.h"
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| 8 | #include <stdio.h>
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| 9 | #include <string.h>
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| 10 | #include <unistd.h>
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| 11 | #include <errno.h>
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| 12 | #include <stdlib.h>
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| 13 | #if ENABLE_LOCALE_SUPPORT
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| 14 | #include <locale.h>
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| 15 | #else
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| 16 | #define setlocale(x,y)
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| 17 | #endif
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| 18 |
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| 19 | const char *bb_applet_name ATTRIBUTE_EXTERNALLY_VISIBLE;
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| 20 |
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| 21 | #ifdef CONFIG_FEATURE_INSTALLER
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| 22 | /*
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| 23 | * directory table
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| 24 | * this should be consistent w/ the enum, busybox.h::Location,
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| 25 | * or else...
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| 26 | */
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| 27 | static const char usr_bin [] ="/usr/bin";
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| 28 | static const char usr_sbin[] ="/usr/sbin";
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| 29 |
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| 30 | static const char* const install_dir[] = {
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| 31 | &usr_bin [8], /* "", equivalent to "/" for concat_path_file() */
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| 32 | &usr_bin [4], /* "/bin" */
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| 33 | &usr_sbin[4], /* "/sbin" */
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| 34 | usr_bin,
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| 35 | usr_sbin
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| 36 | };
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| 37 |
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| 38 | /* abstract link() */
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| 39 | typedef int (*__link_f)(const char *, const char *);
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| 40 |
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| 41 | /* create (sym)links for each applet */
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| 42 | static void install_links(const char *busybox, int use_symbolic_links)
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| 43 | {
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| 44 | __link_f Link = link;
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| 45 |
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| 46 | char *fpc;
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| 47 | int i;
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| 48 | int rc;
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| 49 |
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| 50 | if (use_symbolic_links)
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| 51 | Link = symlink;
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| 52 |
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| 53 | for (i = 0; applets[i].name != NULL; i++) {
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| 54 | fpc = concat_path_file(
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| 55 | install_dir[applets[i].location], applets[i].name);
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| 56 | rc = Link(busybox, fpc);
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| 57 | if (rc!=0 && errno!=EEXIST) {
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| 58 | bb_perror_msg("%s", fpc);
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| 59 | }
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| 60 | free(fpc);
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| 61 | }
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| 62 | }
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| 63 |
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| 64 | #else
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| 65 | #define install_links(x,y)
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| 66 | #endif /* CONFIG_FEATURE_INSTALLER */
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| 67 |
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| 68 | int main(int argc, char **argv)
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| 69 | {
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| 70 | const char *s;
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| 71 |
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| 72 | bb_applet_name=argv[0];
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| 73 | if (*bb_applet_name == '-') bb_applet_name++;
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| 74 | for (s = bb_applet_name; *s ;)
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| 75 | if (*(s++) == '/') bb_applet_name = s;
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| 76 |
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| 77 | /* Set locale for everybody except `init' */
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| 78 | if(ENABLE_LOCALE_SUPPORT && getpid() != 1)
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| 79 | setlocale(LC_ALL, "");
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| 80 |
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| 81 | run_applet_by_name(bb_applet_name, argc, argv);
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| 82 | bb_error_msg_and_die("applet not found");
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| 83 | }
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| 84 |
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| 85 | int busybox_main(int argc, char **argv)
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| 86 | {
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| 87 | /*
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| 88 | * This style of argument parsing doesn't scale well
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| 89 | * in the event that busybox starts wanting more --options.
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| 90 | * If someone has a cleaner approach, by all means implement it.
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| 91 | */
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| 92 | if (ENABLE_FEATURE_INSTALLER && argc > 1 && !strcmp(argv[1], "--install")) {
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| 93 | int use_symbolic_links = 0;
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| 94 | int rc = 0;
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| 95 | char *busybox;
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| 96 |
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| 97 | /* to use symlinks, or not to use symlinks... */
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| 98 | if (argc > 2) {
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| 99 | if ((strcmp(argv[2], "-s") == 0)) {
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| 100 | use_symbolic_links = 1;
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| 101 | }
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| 102 | }
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| 103 |
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| 104 | /* link */
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| 105 | busybox = xreadlink("/proc/self/exe");
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| 106 | if (busybox) {
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| 107 | install_links(busybox, use_symbolic_links);
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| 108 | free(busybox);
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| 109 | } else {
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| 110 | rc = 1;
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| 111 | }
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| 112 | return rc;
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| 113 | }
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| 114 |
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| 115 | /* Deal with --help. (Also print help when called with no arguments) */
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| 116 |
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| 117 | if (argc==1 || !strcmp(argv[1],"--help") ) {
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| 118 | if (argc>2) {
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| 119 | run_applet_by_name(bb_applet_name=argv[2], 2, argv);
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| 120 | } else {
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| 121 | const struct BB_applet *a;
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| 122 | int col, output_width;
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| 123 |
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| 124 | if (ENABLE_FEATURE_AUTOWIDTH) {
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| 125 | /* Obtain the terminal width. */
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| 126 | get_terminal_width_height(0, &output_width, NULL);
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| 127 | /* leading tab and room to wrap */
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| 128 | output_width -= 20;
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| 129 | } else output_width = 60;
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| 130 |
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| 131 | printf("%s\n\n"
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| 132 | "Usage: busybox [function] [arguments]...\n"
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| 133 | " or: [function] [arguments]...\n\n"
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| 134 | "\tBusyBox is a multi-call binary that combines many common Unix\n"
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| 135 | "\tutilities into a single executable. Most people will create a\n"
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| 136 | "\tlink to busybox for each function they wish to use and BusyBox\n"
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| 137 | "\twill act like whatever it was invoked as!\n"
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| 138 | "\nCurrently defined functions:\n", bb_msg_full_version);
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| 139 |
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| 140 | col=0;
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| 141 | for(a = applets; a->name;) {
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| 142 | col += printf("%s%s", (col ? ", " : "\t"), (a++)->name);
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| 143 | if (col > output_width && a->name) {
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| 144 | printf(",\n");
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| 145 | col = 0;
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| 146 | }
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| 147 | }
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| 148 | printf("\n\n");
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| 149 | exit(0);
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| 150 | }
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| 151 | } else run_applet_by_name(argv[1], argc-1, argv+1);
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| 152 |
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| 153 | bb_error_msg_and_die("applet not found");
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| 154 | }
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