applets/busybox.c

   1 /* vi: set sw=4 ts=4: */
   2 #include "internal.h"
   3 #include <stdio.h>
   4 #include <string.h>
   5 #include <errno.h>
   6
   7 #ifndef BB_INIT
   8 #undef BB_FEATURE_LINUXRC
   9 #endif
  10
  11 static int been_there_done_that = 0;
  12
  13 /* It has been alledged that doing such things can
  14  * help reduce binary size when staticly linking,
  15  * of course with glibc, this is unlikely as long
  16  * as we use things like printf -- perhaps a printf
  17  * replacement may be in order
  18  */
  19 #if 0
  20 void exit(int status) __attribute__ ((noreturn));
  21 void exit(int status)
  22 {
  23         _exit(status);
  24 };
  25 void abort(void) __attribute__ ((__noreturn__));
  26 void abort(void)
  27 {
  28         _exit(0);
  29 };
  30 int atexit(void (*__func) (void))
  31 {
  32         _exit(0);
  33 };
  34 void *__libc_stack_end;
  35 #endif
  36
  37 static const struct Applet applets[] = {
  38
  39 #ifdef BB_BASENAME                              //usr/bin/basename
  40         {"basename", basename_main, _BB_DIR_USR_BIN},
  41 #endif
  42 #ifdef BB_BUSYBOX                               //bin
  43         {"busybox", busybox_main, _BB_DIR_BIN},
  44 #endif
  45 #ifdef BB_BLOCK_DEVICE                  //sbin
  46         {"block_device", block_device_main, _BB_DIR_SBIN},
  47 #endif
  48 #ifdef BB_CAT                                   //bin
  49         {"cat", cat_main, _BB_DIR_BIN},
  50 #endif
  51 #ifdef BB_CHMOD_CHOWN_CHGRP             //bin
  52         {"chmod", chmod_chown_chgrp_main, _BB_DIR_BIN},
  53 #endif
  54 #ifdef BB_CHMOD_CHOWN_CHGRP             //bin
  55         {"chown", chmod_chown_chgrp_main, _BB_DIR_BIN},
  56 #endif
  57 #ifdef BB_CHMOD_CHOWN_CHGRP             //bin
  58         {"chgrp", chmod_chown_chgrp_main, _BB_DIR_BIN},
  59 #endif
  60 #ifdef BB_CHROOT                                //sbin
  61         {"chroot", chroot_main, _BB_DIR_SBIN},
  62 #endif
  63 #ifdef BB_CLEAR                                 //usr/bin
  64         {"clear", clear_main, _BB_DIR_USR_BIN},
  65 #endif
  66 #ifdef BB_CHVT                                  //usr/bin
  67         {"chvt", chvt_main, _BB_DIR_USR_BIN},
  68 #endif
  69 #ifdef BB_CP_MV                                 //bin
  70         {"cp", cp_mv_main, _BB_DIR_BIN},
  71 #endif
  72 #ifdef BB_CP_MV                                 //bin
  73         {"mv", cp_mv_main, _BB_DIR_BIN},
  74 #endif
  75 #ifdef BB_DATE                                  //bin
  76         {"date", date_main, _BB_DIR_BIN},
  77 #endif
  78 #ifdef BB_DD                                    //bin
  79         {"dd", dd_main, _BB_DIR_BIN},
  80 #endif
  81 #ifdef BB_DF                                    //bin
  82         {"df", df_main, _BB_DIR_BIN},
  83 #endif
  84 #ifdef BB_DIRNAME                               //usr/bin
  85         {"dirname", dirname_main, _BB_DIR_USR_BIN},
  86 #endif
  87 #ifdef BB_DMESG                                 //bin
  88         {"dmesg", dmesg_main, _BB_DIR_BIN},
  89 #endif
  90 #ifdef BB_DU                                    //bin
  91         {"du", du_main, _BB_DIR_BIN},
  92 #endif
  93 #ifdef BB_DUTMP                                 //usr/sbin
  94         {"dutmp", dutmp_main, _BB_DIR_USR_SBIN},
  95 #endif
  96 #ifdef BB_ECHO                                  //bin
  97         {"echo", echo_main, _BB_DIR_BIN},
  98 #endif
  99 #ifdef BB_FBSET                                 //usr/sbin
 100         {"fbset", fbset_main, _BB_DIR_USR_SBIN},
 101 #endif
 102 #ifdef BB_FDFLUSH                               //bin
 103         {"fdflush", fdflush_main, _BB_DIR_BIN},
 104 #endif
 105 #ifdef BB_FIND                                  //usr/bin
 106         {"find", find_main, _BB_DIR_USR_BIN},
 107 #endif
 108 #ifdef BB_FREE                                  //usr/bin
 109         {"free", free_main, _BB_DIR_USR_BIN},
 110 #endif
 111 #ifdef BB_FREERAMDISK                   //sbin
 112         {"freeramdisk", freeramdisk_main, _BB_DIR_SBIN},
 113 #endif
 114 #ifdef BB_DEALLOCVT                             //usr/bin
 115         {"deallocvt", deallocvt_main, _BB_DIR_USR_BIN},
 116 #endif
 117 #ifdef BB_FSCK_MINIX                    //sbin
 118         {"fsck.minix", fsck_minix_main, _BB_DIR_SBIN},
 119 #endif
 120 #ifdef BB_MKFS_MINIX                    //sbin
 121         {"mkfs.minix", mkfs_minix_main, _BB_DIR_SBIN},
 122 #endif
 123 #ifdef BB_GREP                                  //bin
 124         {"grep", grep_main, _BB_DIR_BIN},
 125 #endif
 126 #ifdef BB_HALT                                  //sbin
 127         {"halt", halt_main, _BB_DIR_SBIN},
 128 #endif
 129 #ifdef BB_HEAD                                  //bin
 130         {"head", head_main, _BB_DIR_BIN},
 131 #endif
 132 #ifdef BB_HOSTID                                //usr/bin
 133         {"hostid", hostid_main, _BB_DIR_USR_BIN},
 134 #endif
 135 #ifdef BB_HOSTNAME                              //bin
 136         {"hostname", hostname_main, _BB_DIR_BIN},
 137 #endif
 138 #ifdef BB_INIT                                  //sbin
 139         {"init", init_main, _BB_DIR_SBIN},
 140 #endif
 141 #ifdef BB_INSMOD                                //sbin
 142         {"insmod", insmod_main, _BB_DIR_SBIN},
 143 #endif
 144 #ifdef BB_FEATURE_LINUXRC               //
 145         {"linuxrc", init_main, _BB_DIR_ROOT},
 146 #endif
 147 #ifdef BB_KILL                                  //bin
 148         {"kill", kill_main, _BB_DIR_BIN},
 149 #endif
 150 #ifdef BB_KILLALL                               //usr/bin
 151         {"killall", kill_main, _BB_DIR_USR_BIN},
 152 #endif
 153 #ifdef BB_LENGTH                                //usr/bin
 154         {"length", length_main, _BB_DIR_USR_BIN},
 155 #endif
 156 #ifdef BB_LN                                    //bin
 157         {"ln", ln_main, _BB_DIR_BIN},
 158 #endif
 159 #ifdef BB_LOADACM                               //usr/bin
 160         {"loadacm", loadacm_main, _BB_DIR_USR_BIN},
 161 #endif
 162 #ifdef BB_LOADFONT                              //usr/bin
 163         {"loadfont", loadfont_main, _BB_DIR_USR_BIN},
 164 #endif
 165 #ifdef BB_LOADKMAP                              //sbin
 166         {"loadkmap", loadkmap_main, _BB_DIR_SBIN},
 167 #endif
 168 #ifdef BB_LS                                    //bin
 169         {"ls", ls_main, _BB_DIR_BIN},
 170 #endif
 171 #ifdef BB_LSMOD                                 //sbin
 172         {"lsmod", lsmod_main, _BB_DIR_SBIN},
 173 #endif
 174 #ifdef BB_MAKEDEVS                              //sbin
 175         {"makedevs", makedevs_main, _BB_DIR_SBIN},
 176 #endif
 177 #ifdef BB_MATH                                  //usr/bin
 178         {"math", math_main, _BB_DIR_USR_BIN},
 179 #endif
 180 #ifdef BB_MKDIR                                 //bin
 181         {"mkdir", mkdir_main, _BB_DIR_BIN},
 182 #endif
 183 #ifdef BB_MKFIFO                                //usr/bin
 184         {"mkfifo", mkfifo_main, _BB_DIR_USR_BIN},
 185 #endif
 186 #ifdef BB_MKNOD                                 //bin
 187         {"mknod", mknod_main, _BB_DIR_BIN},
 188 #endif
 189 #ifdef BB_MKSWAP                                //sbin
 190         {"mkswap", mkswap_main, _BB_DIR_SBIN},
 191 #endif
 192 #ifdef BB_MNC                                   //usr/bin
 193         {"mnc", mnc_main, _BB_DIR_USR_BIN},
 194 #endif
 195 #ifdef BB_MORE                                  //bin
 196         {"more", more_main, _BB_DIR_BIN},
 197 #endif
 198 #ifdef BB_MOUNT                                 //bin
 199         {"mount", mount_main, _BB_DIR_BIN},
 200 #endif
 201 #ifdef BB_MT                                    //bin
 202         {"mt", mt_main, _BB_DIR_BIN},
 203 #endif
 204 #ifdef BB_NSLOOKUP                              //usr/bin
 205         {"nslookup", nslookup_main, _BB_DIR_USR_BIN},
 206 #endif
 207 #ifdef BB_PING                                  //bin
 208         {"ping", ping_main, _BB_DIR_BIN},
 209 #endif
 210 #ifdef BB_POWEROFF                              //sbin
 211         {"poweroff", poweroff_main, _BB_DIR_SBIN},
 212 #endif
 213 #ifdef BB_PRINTF                                //usr/bin
 214         {"printf", printf_main, _BB_DIR_USR_BIN},
 215 #endif
 216 #ifdef BB_PS                                    //bin
 217         {"ps", ps_main, _BB_DIR_BIN},
 218 #endif
 219 #ifdef BB_PWD                                   //bin
 220         {"pwd", pwd_main, _BB_DIR_BIN},
 221 #endif
 222 #ifdef BB_REBOOT                                //sbin
 223         {"reboot", reboot_main, _BB_DIR_SBIN},
 224 #endif
 225 #ifdef BB_RM                                    //bin
 226         {"rm", rm_main, _BB_DIR_BIN},
 227 #endif
 228 #ifdef BB_RMDIR                                 //bin
 229         {"rmdir", rmdir_main, _BB_DIR_BIN},
 230 #endif
 231 #ifdef BB_RMMOD                                 //sbin
 232         {"rmmod", rmmod_main, _BB_DIR_SBIN},
 233 #endif
 234 #ifdef BB_SED                                   //bin
 235         {"sed", sed_main, _BB_DIR_BIN},
 236 #endif
 237 #ifdef BB_SH                                    //bin
 238         {"sh", shell_main, _BB_DIR_BIN},
 239 #endif
 240 #ifdef BB_SFDISK                                //sbin
 241         {"fdisk", sfdisk_main, _BB_DIR_SBIN},
 242 #ifdef BB_SFDISK                                //sbin
 243 #endif
 244         {"sfdisk", sfdisk_main, _BB_DIR_SBIN},
 245 #endif
 246 #ifdef BB_SLEEP                                 //bin
 247         {"sleep", sleep_main, _BB_DIR_BIN},
 248 #endif
 249 #ifdef BB_SORT                                  //bin
 250         {"sort", sort_main, _BB_DIR_BIN},
 251 #endif
 252 #ifdef BB_SYNC                                  //bin
 253         {"sync", sync_main, _BB_DIR_BIN},
 254 #endif
 255 #ifdef BB_SYSLOGD                               //sbin
 256         {"syslogd", syslogd_main, _BB_DIR_SBIN},
 257 #endif
 258 #ifdef BB_LOGGER                                //usr/bin
 259         {"logger", logger_main, _BB_DIR_USR_BIN},
 260 #endif
 261 #ifdef BB_LOGNAME                               //usr/bin
 262         {"logname", logname_main, _BB_DIR_USR_BIN},
 263 #endif
 264 #ifdef BB_SWAPONOFF                             //sbin
 265         {"swapon", swap_on_off_main, _BB_DIR_SBIN},
 266 #endif
 267 #ifdef BB_SWAPONOFF                             //sbin
 268         {"swapoff", swap_on_off_main, _BB_DIR_SBIN},
 269 #endif
 270 #ifdef BB_TAIL                                  //usr/bin
 271         {"tail", tail_main, _BB_DIR_USR_BIN},
 272 #endif
 273 #ifdef BB_TAR                                   //bin
 274         {"tar", tar_main, _BB_DIR_BIN},
 275 #endif
 276 #ifdef BB_TELNET                                //usr/bin
 277         {"telnet", telnet_main, _BB_DIR_USR_BIN},
 278 #endif
 279 #ifdef BB_TEST                                  //usr/bin
 280         {"[", test_main, _BB_DIR_USR_BIN},
 281 #endif
 282 #ifdef BB_TEST                                  //usr/bin
 283         {"test", test_main, _BB_DIR_USR_BIN},
 284 #endif
 285 #ifdef BB_TEE                                   //bin
 286         {"tee", tee_main, _BB_DIR_BIN},
 287 #endif
 288 #ifdef BB_TOUCH                                 //usr/bin
 289         {"touch", touch_main, _BB_DIR_USR_BIN},
 290 #endif
 291 #ifdef BB_TR                                    //usr/bin
 292         {"tr", tr_main, _BB_DIR_USR_BIN},
 293 #endif
 294 #ifdef BB_TRUE_FALSE                    //bin
 295         {"true", true_main, _BB_DIR_BIN},
 296 #endif
 297 #ifdef BB_TRUE_FALSE                    //bin
 298         {"false", false_main, _BB_DIR_BIN},
 299 #endif
 300 #ifdef BB_TTY                                   //usr/bin
 301         {"tty", tty_main, _BB_DIR_USR_BIN},
 302 #endif
 303 #ifdef BB_UMOUNT                                //bin
 304         {"umount", umount_main, _BB_DIR_BIN},
 305 #endif
 306 #ifdef BB_UNAME                                 //bin
 307         {"uname", uname_main, _BB_DIR_BIN},
 308 #endif
 309 #ifdef BB_UPTIME                                //usr/bin
 310         {"uptime", uptime_main, _BB_DIR_USR_BIN},
 311 #endif
 312 #ifdef BB_UNIQ                                  //bin
 313         {"uniq", uniq_main, _BB_DIR_BIN},
 314 #endif
 315 #ifdef BB_UPDATE                                //sbin
 316         {"update", update_main, _BB_DIR_SBIN},
 317 #endif
 318 #ifdef BB_WC                                    //usr/bin
 319         {"wc", wc_main, _BB_DIR_USR_BIN},
 320 #endif
 321 #ifdef BB_WHOAMI                                //usr/bin
 322         {"whoami", whoami_main, _BB_DIR_USR_BIN},
 323 #endif
 324 #ifdef BB_YES                                   //usr/bin
 325         {"yes", yes_main, _BB_DIR_USR_BIN},
 326 #endif
 327 #ifdef BB_GUNZIP                                //bin
 328         {"zcat", gunzip_main, _BB_DIR_BIN},
 329 #endif
 330 #ifdef BB_GUNZIP                                //bin
 331         {"gunzip", gunzip_main, _BB_DIR_BIN},
 332 #endif
 333 #ifdef BB_GZIP                                  //bin
 334         {"gzip", gzip_main, _BB_DIR_BIN},
 335 #endif
 336         {0}
 337 };
 338
 339
 340
 341 int main(int argc, char **argv)
 342 {
 343         char                            *s;
 344         char                            *name;
 345         const struct Applet     *a              = applets;
 346
 347         for (s = name = argv[0]; *s != '\0';) {
 348                 if (*s++ == '/')
 349                         name = s;
 350         }
 351
 352         *argv = name;
 353
 354         while (a->name != 0) {
 355                 if (strcmp(name, a->name) == 0) {
 356                         int status;
 357
 358                         status = ((*(a->main)) (argc, argv));
 359                         if (status < 0) {
 360                                 fprintf(stderr, "%s: %s\n", a->name, strerror(errno));
 361                         }
 362                         fprintf(stderr, "\n");
 363                         exit(status);
 364                 }
 365                 a++;
 366         }
 367         exit(busybox_main(argc, argv));
 368 }
 369
 370
 371 int busybox_main(int argc, char **argv)
 372 {
 373         int col = 0;
 374
 375         argc--;
 376         argv++;
 377
 378         if (been_there_done_that == 1 || argc < 1) {
 379                 const struct Applet *a = applets;
 380
 381                 fprintf(stderr, "BusyBox v%s (%s) multi-call binary -- GPL2\n\n",
 382                                 BB_VER, BB_BT);
 383                 fprintf(stderr, "Usage: busybox [function] [arguments]...\n");
 384                 fprintf(stderr, "   or: [function] [arguments]...\n\n");
 385                 fprintf(stderr,
 386                                 "\tMost people will create a link to busybox for each\n"
 387                                 "\tfunction name, and busybox will act like whatever you invoke it as.\n");
 388                 fprintf(stderr, "\nCurrently defined functions:\n");
 389
 390                 while (a->name != 0) {
 391                         col +=
 392                                 fprintf(stderr, "%s%s", ((col == 0) ? "\t" : ", "),
 393                                                 (a++)->name);
 394                         if (col > 60 && a->name != 0) {
 395                                 fprintf(stderr, ",\n");
 396                                 col = 0;
 397                         }
 398                 }
 399                 fprintf(stderr, "\n\n");
 400                 exit(-1);
 401         } else {
 402                 /* If we've already been here once, exit now */
 403                 been_there_done_that = 1;
 404                 return (main(argc, argv));
 405         }
 406 }
 407
 408 /*
 409 Local Variables:
 410 c-file-style: "linux"
 411 c-basic-offset: 4
 412 tab-width: 4
 413 End:
 414 */