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 static int been_there_done_that = 0;
   8
   9 /* It has been alledged that doing such things can
  10  * help reduce binary size when staticly linking,
  11  * of course with glibc, this is unlikely as long
  12  * as we use things like printf -- perhaps a printf
  13  * replacement may be in order
  14  */
  15 #if 0
  16 void exit(int status) __attribute__ ((noreturn));
  17 void exit(int status)
  18 {
  19         _exit(status);
  20 };
  21 void abort(void) __attribute__ ((__noreturn__));
  22 void abort(void)
  23 {
  24         _exit(0);
  25 };
  26 int atexit(void (*__func) (void))
  27 {
  28         _exit(0);
  29 };
  30 void *__libc_stack_end;
  31 #endif
  32
  33 const struct BB_applet applets[] = {
  34
  35 #ifdef BB_BASENAME
  36         {"basename", basename_main, _BB_DIR_USR_BIN},
  37 #endif
  38         {"busybox", busybox_main, _BB_DIR_BIN},
  39 #ifdef BB_BLOCK_DEVICE
  40         {"block_device", block_device_main, _BB_DIR_SBIN},
  41 #endif
  42 #ifdef BB_CAT
  43         {"cat", cat_main, _BB_DIR_BIN},
  44 #endif
  45 #ifdef BB_CHMOD_CHOWN_CHGRP
  46         {"chgrp", chmod_chown_chgrp_main, _BB_DIR_BIN},
  47 #endif
  48 #ifdef BB_CHMOD_CHOWN_CHGRP
  49         {"chmod", chmod_chown_chgrp_main, _BB_DIR_BIN},
  50 #endif
  51 #ifdef BB_CHMOD_CHOWN_CHGRP
  52         {"chown", chmod_chown_chgrp_main, _BB_DIR_BIN},
  53 #endif
  54 #ifdef BB_CHROOT
  55         {"chroot", chroot_main, _BB_DIR_SBIN},
  56 #endif
  57 #ifdef BB_CLEAR
  58         {"clear", clear_main, _BB_DIR_USR_BIN},
  59 #endif
  60 #ifdef BB_CHVT
  61         {"chvt", chvt_main, _BB_DIR_USR_BIN},
  62 #endif
  63 #ifdef BB_CP_MV
  64         {"cp", cp_mv_main, _BB_DIR_BIN},
  65 #endif
  66 #ifdef BB_CUT
  67         {"cut", cut_main, _BB_DIR_USR_BIN},
  68 #endif
  69 #ifdef BB_DATE
  70         {"date", date_main, _BB_DIR_BIN},
  71 #endif
  72 #ifdef BB_DD
  73         {"dd", dd_main, _BB_DIR_BIN},
  74 #endif
  75 #ifdef BB_DF
  76         {"df", df_main, _BB_DIR_BIN},
  77 #endif
  78 #ifdef BB_DIRNAME
  79         {"dirname", dirname_main, _BB_DIR_USR_BIN},
  80 #endif
  81 #ifdef BB_DMESG
  82         {"dmesg", dmesg_main, _BB_DIR_BIN},
  83 #endif
  84 #ifdef BB_DU
  85         {"du", du_main, _BB_DIR_BIN},
  86 #endif
  87 #ifdef BB_DUTMP
  88         {"dutmp", dutmp_main, _BB_DIR_USR_SBIN},
  89 #endif
  90 #ifdef BB_ECHO
  91         {"echo", echo_main, _BB_DIR_BIN},
  92 #endif
  93 #ifdef BB_TRUE_FALSE
  94         {"false", false_main, _BB_DIR_BIN},
  95 #endif
  96 #ifdef BB_FBSET
  97         {"fbset", fbset_main, _BB_DIR_USR_SBIN},
  98 #endif
  99 #ifdef BB_FDFLUSH
 100         {"fdflush", fdflush_main, _BB_DIR_BIN},
 101 #endif
 102 #ifdef BB_FIND
 103         {"find", find_main, _BB_DIR_USR_BIN},
 104 #endif
 105 #ifdef BB_FREE
 106         {"free", free_main, _BB_DIR_USR_BIN},
 107 #endif
 108 #ifdef BB_FREERAMDISK
 109         {"freeramdisk", freeramdisk_main, _BB_DIR_SBIN},
 110 #endif
 111 #ifdef BB_DEALLOCVT
 112         {"deallocvt", deallocvt_main, _BB_DIR_USR_BIN},
 113 #endif
 114 #ifdef BB_FSCK_MINIX
 115         {"fsck.minix", fsck_minix_main, _BB_DIR_SBIN},
 116 #endif
 117 #ifdef BB_GREP
 118         {"grep", grep_main, _BB_DIR_BIN},
 119 #endif
 120 #ifdef BB_GUNZIP
 121         {"gunzip", gunzip_main, _BB_DIR_BIN},
 122 #endif
 123 #ifdef BB_GZIP
 124         {"gzip", gzip_main, _BB_DIR_BIN},
 125 #endif
 126 #ifdef BB_HALT
 127         {"halt", halt_main, _BB_DIR_SBIN},
 128 #endif
 129 #ifdef BB_HEAD
 130         {"head", head_main, _BB_DIR_BIN},
 131 #endif
 132 #ifdef BB_HOSTID
 133         {"hostid", hostid_main, _BB_DIR_USR_BIN},
 134 #endif
 135 #ifdef BB_HOSTNAME
 136         {"hostname", hostname_main, _BB_DIR_BIN},
 137 #endif
 138 #ifdef BB_ID
 139         {"id", id_main, _BB_DIR_USR_BIN},
 140 #endif
 141 #ifdef BB_INIT
 142         {"init", init_main, _BB_DIR_SBIN},
 143 #endif
 144 #ifdef BB_INSMOD
 145         {"insmod", insmod_main, _BB_DIR_SBIN},
 146 #endif
 147 #ifdef BB_KILL
 148         {"kill", kill_main, _BB_DIR_BIN},
 149 #endif
 150 #ifdef BB_KILLALL
 151         {"killall", kill_main, _BB_DIR_USR_BIN},
 152 #endif
 153 #ifdef BB_LENGTH
 154         {"length", length_main, _BB_DIR_USR_BIN},
 155 #endif
 156 #ifdef BB_LINUXRC
 157         {"linuxrc", init_main, _BB_DIR_ROOT},
 158 #endif
 159 #ifdef BB_LN
 160         {"ln", ln_main, _BB_DIR_BIN},
 161 #endif
 162 #ifdef BB_LOADACM
 163         {"loadacm", loadacm_main, _BB_DIR_USR_BIN},
 164 #endif
 165 #ifdef BB_LOADFONT
 166         {"loadfont", loadfont_main, _BB_DIR_USR_BIN},
 167 #endif
 168 #ifdef BB_LOADKMAP
 169         {"loadkmap", loadkmap_main, _BB_DIR_SBIN},
 170 #endif
 171 #ifdef BB_LOGGER
 172         {"logger", logger_main, _BB_DIR_USR_BIN},
 173 #endif
 174 #ifdef BB_LOGNAME
 175         {"logname", logname_main, _BB_DIR_USR_BIN},
 176 #endif
 177 #ifdef BB_LS
 178         {"ls", ls_main, _BB_DIR_BIN},
 179 #endif
 180 #ifdef BB_LSMOD
 181         {"lsmod", lsmod_main, _BB_DIR_SBIN},
 182 #endif
 183 #ifdef BB_MAKEDEVS
 184         {"makedevs", makedevs_main, _BB_DIR_SBIN},
 185 #endif
 186 #ifdef BB_MATH
 187         {"math", math_main, _BB_DIR_USR_BIN},
 188 #endif
 189 #ifdef BB_MKDIR
 190         {"mkdir", mkdir_main, _BB_DIR_BIN},
 191 #endif
 192 #ifdef BB_MKFIFO
 193         {"mkfifo", mkfifo_main, _BB_DIR_USR_BIN},
 194 #endif
 195 #ifdef BB_MKFS_MINIX
 196         {"mkfs.minix", mkfs_minix_main, _BB_DIR_SBIN},
 197 #endif
 198 #ifdef BB_MKNOD
 199         {"mknod", mknod_main, _BB_DIR_BIN},
 200 #endif
 201 #ifdef BB_MKSWAP
 202         {"mkswap", mkswap_main, _BB_DIR_SBIN},
 203 #endif
 204 #ifdef BB_MKTEMP
 205         {"mktemp", mktemp_main, _BB_DIR_BIN},
 206 #endif
 207 #ifdef BB_NC
 208         {"nc", nc_main, _BB_DIR_USR_BIN},
 209 #endif
 210 #ifdef BB_MORE
 211         {"more", more_main, _BB_DIR_BIN},
 212 #endif
 213 #ifdef BB_MOUNT
 214         {"mount", mount_main, _BB_DIR_BIN},
 215 #endif
 216 #ifdef BB_MT
 217         {"mt", mt_main, _BB_DIR_BIN},
 218 #endif
 219 #ifdef BB_CP_MV
 220         {"mv", cp_mv_main, _BB_DIR_BIN},
 221 #endif
 222 #ifdef BB_NSLOOKUP
 223         {"nslookup", nslookup_main, _BB_DIR_USR_BIN},
 224 #endif
 225 #ifdef BB_PING
 226         {"ping", ping_main, _BB_DIR_BIN},
 227 #endif
 228 #ifdef BB_POWEROFF
 229         {"poweroff", poweroff_main, _BB_DIR_SBIN},
 230 #endif
 231 #ifdef BB_PRINTF
 232         {"printf", printf_main, _BB_DIR_USR_BIN},
 233 #endif
 234 #ifdef BB_PS
 235         {"ps", ps_main, _BB_DIR_BIN},
 236 #endif
 237 #ifdef BB_PWD
 238         {"pwd", pwd_main, _BB_DIR_BIN},
 239 #endif
 240 #ifdef BB_REBOOT
 241         {"reboot", reboot_main, _BB_DIR_SBIN},
 242 #endif
 243 #ifdef BB_RM
 244         {"rm", rm_main, _BB_DIR_BIN},
 245 #endif
 246 #ifdef BB_RMDIR
 247         {"rmdir", rmdir_main, _BB_DIR_BIN},
 248 #endif
 249 #ifdef BB_RMMOD
 250         {"rmmod", rmmod_main, _BB_DIR_SBIN},
 251 #endif
 252 #ifdef BB_SED
 253         {"sed", sed_main, _BB_DIR_BIN},
 254 #endif
 255 #ifdef BB_SETKEYCODES
 256         {"setkeycodes", setkeycodes_main, _BB_DIR_USR_BIN},
 257 #endif
 258 #ifdef BB_SFDISK
 259         {"sfdisk", sfdisk_main, _BB_DIR_SBIN},
 260 #endif
 261 #ifdef BB_SH
 262         {"sh", shell_main, _BB_DIR_BIN},
 263 #endif
 264 #ifdef BB_SLEEP
 265         {"sleep", sleep_main, _BB_DIR_BIN},
 266 #endif
 267 #ifdef BB_SORT
 268         {"sort", sort_main, _BB_DIR_BIN},
 269 #endif
 270 #ifdef BB_SYNC
 271         {"sync", sync_main, _BB_DIR_BIN},
 272 #endif
 273 #ifdef BB_SYSLOGD
 274         {"syslogd", syslogd_main, _BB_DIR_SBIN},
 275 #endif
 276 #ifdef BB_SWAPONOFF
 277         {"swapon", swap_on_off_main, _BB_DIR_SBIN},
 278 #endif
 279 #ifdef BB_SWAPONOFF
 280         {"swapoff", swap_on_off_main, _BB_DIR_SBIN},
 281 #endif
 282 #ifdef BB_TAIL
 283         {"tail", tail_main, _BB_DIR_USR_BIN},
 284 #endif
 285 #ifdef BB_TAR
 286         {"tar", tar_main, _BB_DIR_BIN},
 287 #endif
 288 #ifdef BB_TELNET
 289         {"telnet", telnet_main, _BB_DIR_USR_BIN},
 290 #endif
 291 #ifdef BB_TEST
 292         {"test", test_main, _BB_DIR_USR_BIN},
 293 #endif
 294 #ifdef BB_TEE
 295         {"tee", tee_main, _BB_DIR_BIN},
 296 #endif
 297 #ifdef BB_TOUCH
 298         {"touch", touch_main, _BB_DIR_USR_BIN},
 299 #endif
 300 #ifdef BB_TR
 301         {"tr", tr_main, _BB_DIR_USR_BIN},
 302 #endif
 303 #ifdef BB_TRUE_FALSE
 304         {"true", true_main, _BB_DIR_BIN},
 305 #endif
 306 #ifdef BB_TTY
 307         {"tty", tty_main, _BB_DIR_USR_BIN},
 308 #endif
 309 #ifdef BB_UMOUNT
 310         {"umount", umount_main, _BB_DIR_BIN},
 311 #endif
 312 #ifdef BB_UNAME
 313         {"uname", uname_main, _BB_DIR_BIN},
 314 #endif
 315 #ifdef BB_UNIQ
 316         {"uniq", uniq_main, _BB_DIR_USR_BIN},
 317 #endif
 318 #ifdef BB_UPDATE
 319         {"update", update_main, _BB_DIR_SBIN},
 320 #endif
 321 #ifdef BB_UPTIME
 322         {"uptime", uptime_main, _BB_DIR_USR_BIN},
 323 #endif
 324 #ifdef BB_USLEEP
 325         {"usleep", usleep_main, _BB_DIR_BIN},
 326 #endif
 327 #ifdef BB_WC
 328         {"wc", wc_main, _BB_DIR_USR_BIN},
 329 #endif
 330 #ifdef BB_WHICH
 331         {"which", which_main, _BB_DIR_USR_BIN},
 332 #endif
 333 #ifdef BB_WHOAMI
 334         {"whoami", whoami_main, _BB_DIR_USR_BIN},
 335 #endif
 336 #ifdef BB_YES
 337         {"yes", yes_main, _BB_DIR_USR_BIN},
 338 #endif
 339 #ifdef BB_GUNZIP
 340         {"zcat", gunzip_main, _BB_DIR_BIN},
 341 #endif
 342 #ifdef BB_TEST
 343         {"[", test_main, _BB_DIR_USR_BIN},
 344 #endif
 345         {0}
 346 };
 347
 348
 349
 350 int main(int argc, char **argv)
 351 {
 352         char                            *s;
 353         char                            *name;
 354         const struct BB_applet  *a              = applets;
 355
 356         for (s = name = argv[0]; *s != '\0';) {
 357                 if (*s++ == '/')
 358                         name = s;
 359         }
 360
 361         *argv = name;
 362
 363         while (a->name != 0) {
 364                 if (strcmp(name, a->name) == 0) {
 365                         int status;
 366
 367                         status = ((*(a->main)) (argc, argv));
 368                         if (status < 0) {
 369                                 fprintf(stderr, "%s: %s\n", a->name, strerror(errno));
 370                         }
 371                         fprintf(stderr, "\n");
 372                         exit(status);
 373                 }
 374                 a++;
 375         }
 376         exit(busybox_main(argc, argv));
 377 }
 378
 379
 380 int busybox_main(int argc, char **argv)
 381 {
 382         int col = 0;
 383
 384         argc--;
 385         argv++;
 386
 387         if (been_there_done_that == 1 || argc < 1) {
 388                 const struct BB_applet *a = applets;
 389
 390                 fprintf(stderr, "BusyBox v%s (%s) multi-call binary -- GPL2\n\n"
 391                                 "Usage: busybox [function] [arguments]...\n"
 392                                 "   or: [function] [arguments]...\n\n"
 393                                 "\tBusyBox is a multi-call binary that combines many common Unix\n"
 394                                 "\tutilities into a single executable.  Most people will create a\n"
 395                                 "\tlink to busybox for each function they wish to use, and BusyBox\n"
 396                                 "\twill act like whatever it was invoked as.\n"
 397                                 "\nCurrently defined functions:\n", BB_VER, BB_BT);
 398
 399                 while (a->name != 0) {
 400                         col +=
 401                                 fprintf(stderr, "%s%s", ((col == 0) ? "\t" : ", "),
 402                                                 (a++)->name);
 403                         if (col > 60 && a->name != 0) {
 404                                 fprintf(stderr, ",\n");
 405                                 col = 0;
 406                         }
 407                 }
 408                 fprintf(stderr, "\n\n");
 409                 exit(-1);
 410         } else {
 411                 /* If we've already been here once, exit now */
 412                 been_there_done_that = 1;
 413                 return (main(argc, argv));
 414         }
 415 }
 416
 417 /*
 418 Local Variables:
 419 c-file-style: "linux"
 420 c-basic-offset: 4
 421 tab-width: 4
 422 End:
 423 */