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 #define bb_need_full_version
   8 #define BB_DECLARE_EXTERN
   9 #include "messages.c"
  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 const struct BB_applet applets[] = {
  38
  39 #ifdef BB_AR
  40         {"ar", ar_main, _BB_DIR_USR_BIN},
  41 #endif
  42 #ifdef BB_BASENAME
  43         {"basename", basename_main, _BB_DIR_USR_BIN},
  44 #endif
  45         {"busybox", busybox_main, _BB_DIR_BIN},
  46 #ifdef BB_CAT
  47         {"cat", cat_main, _BB_DIR_BIN},
  48 #endif
  49 #ifdef BB_CHMOD_CHOWN_CHGRP
  50         {"chgrp", chmod_chown_chgrp_main, _BB_DIR_BIN},
  51 #endif
  52 #ifdef BB_CHMOD_CHOWN_CHGRP
  53         {"chmod", chmod_chown_chgrp_main, _BB_DIR_BIN},
  54 #endif
  55 #ifdef BB_CHMOD_CHOWN_CHGRP
  56         {"chown", chmod_chown_chgrp_main, _BB_DIR_BIN},
  57 #endif
  58 #ifdef BB_CHROOT
  59         {"chroot", chroot_main, _BB_DIR_SBIN},
  60 #endif
  61 #ifdef BB_CLEAR
  62         {"clear", clear_main, _BB_DIR_USR_BIN},
  63 #endif
  64 #ifdef BB_CHVT
  65         {"chvt", chvt_main, _BB_DIR_USR_BIN},
  66 #endif
  67 #ifdef BB_CP_MV
  68         {"cp", cp_mv_main, _BB_DIR_BIN},
  69 #endif
  70 #ifdef BB_CUT
  71         {"cut", cut_main, _BB_DIR_USR_BIN},
  72 #endif
  73 #ifdef BB_DATE
  74         {"date", date_main, _BB_DIR_BIN},
  75 #endif
  76 #ifdef BB_DC
  77         {"dc", dc_main, _BB_DIR_USR_BIN},
  78 #endif
  79 #ifdef BB_DD
  80         {"dd", dd_main, _BB_DIR_BIN},
  81 #endif
  82 #ifdef BB_DF
  83         {"df", df_main, _BB_DIR_BIN},
  84 #endif
  85 #ifdef BB_DIRNAME
  86         {"dirname", dirname_main, _BB_DIR_USR_BIN},
  87 #endif
  88 #ifdef BB_DMESG
  89         {"dmesg", dmesg_main, _BB_DIR_BIN},
  90 #endif
  91 #ifdef BB_DU
  92         {"du", du_main, _BB_DIR_BIN},
  93 #endif
  94 #ifdef BB_DUMPKMAP
  95         {"dumpkmap", dumpkmap_main, _BB_DIR_BIN},
  96 #endif
  97 #ifdef BB_DUTMP
  98         {"dutmp", dutmp_main, _BB_DIR_USR_SBIN},
  99 #endif
 100 #ifdef BB_ECHO
 101         {"echo", echo_main, _BB_DIR_BIN},
 102 #endif
 103 #ifdef BB_TRUE_FALSE
 104         {"false", false_main, _BB_DIR_BIN},
 105 #endif
 106 #ifdef BB_FBSET
 107         {"fbset", fbset_main, _BB_DIR_USR_SBIN},
 108 #endif
 109 #ifdef BB_FDFLUSH
 110         {"fdflush", fdflush_main, _BB_DIR_BIN},
 111 #endif
 112 #ifdef BB_FIND
 113         {"find", find_main, _BB_DIR_USR_BIN},
 114 #endif
 115 #ifdef BB_FREE
 116         {"free", free_main, _BB_DIR_USR_BIN},
 117 #endif
 118 #ifdef BB_FREERAMDISK
 119         {"freeramdisk", freeramdisk_main, _BB_DIR_SBIN},
 120 #endif
 121 #ifdef BB_DEALLOCVT
 122         {"deallocvt", deallocvt_main, _BB_DIR_USR_BIN},
 123 #endif
 124 #ifdef BB_FSCK_MINIX
 125         {"fsck.minix", fsck_minix_main, _BB_DIR_SBIN},
 126 #endif
 127 #ifdef BB_GREP
 128         {"grep", grep_main, _BB_DIR_BIN},
 129 #endif
 130 #ifdef BB_GUNZIP
 131         {"gunzip", gunzip_main, _BB_DIR_BIN},
 132 #endif
 133 #ifdef BB_GZIP
 134         {"gzip", gzip_main, _BB_DIR_BIN},
 135 #endif
 136 #ifdef BB_HALT
 137         {"halt", halt_main, _BB_DIR_SBIN},
 138 #endif
 139 #ifdef BB_HEAD
 140         {"head", head_main, _BB_DIR_USR_BIN},
 141 #endif
 142 #ifdef BB_HOSTID
 143         {"hostid", hostid_main, _BB_DIR_USR_BIN},
 144 #endif
 145 #ifdef BB_HOSTNAME
 146         {"hostname", hostname_main, _BB_DIR_BIN},
 147 #endif
 148 #ifdef BB_ID
 149         {"id", id_main, _BB_DIR_USR_BIN},
 150 #endif
 151 #ifdef BB_INIT
 152         {"init", init_main, _BB_DIR_SBIN},
 153 #endif
 154 #ifdef BB_INSMOD
 155         {"insmod", insmod_main, _BB_DIR_SBIN},
 156 #endif
 157 #ifdef BB_KILL
 158         {"kill", kill_main, _BB_DIR_BIN},
 159 #endif
 160 #ifdef BB_KILLALL
 161         {"killall", kill_main, _BB_DIR_USR_BIN},
 162 #endif
 163 #ifdef BB_LENGTH
 164         {"length", length_main, _BB_DIR_USR_BIN},
 165 #endif
 166 #ifdef BB_LINUXRC
 167         {"linuxrc", init_main, _BB_DIR_ROOT},
 168 #endif
 169 #ifdef BB_LN
 170         {"ln", ln_main, _BB_DIR_BIN},
 171 #endif
 172 #ifdef BB_LOADACM
 173         {"loadacm", loadacm_main, _BB_DIR_USR_BIN},
 174 #endif
 175 #ifdef BB_LOADFONT
 176         {"loadfont", loadfont_main, _BB_DIR_USR_BIN},
 177 #endif
 178 #ifdef BB_LOADKMAP
 179         {"loadkmap", loadkmap_main, _BB_DIR_SBIN},
 180 #endif
 181 #ifdef BB_LOGGER
 182         {"logger", logger_main, _BB_DIR_USR_BIN},
 183 #endif
 184 #ifdef BB_LOGNAME
 185         {"logname", logname_main, _BB_DIR_USR_BIN},
 186 #endif
 187 #ifdef BB_LS
 188         {"ls", ls_main, _BB_DIR_BIN},
 189 #endif
 190 #ifdef BB_LSMOD
 191         {"lsmod", lsmod_main, _BB_DIR_SBIN},
 192 #endif
 193 #ifdef BB_MAKEDEVS
 194         {"makedevs", makedevs_main, _BB_DIR_SBIN},
 195 #endif
 196 #ifdef BB_MD5SUM
 197         {"md5sum", md5sum_main, _BB_DIR_USR_BIN},
 198 #endif
 199 #ifdef BB_MKDIR
 200         {"mkdir", mkdir_main, _BB_DIR_BIN},
 201 #endif
 202 #ifdef BB_MKFIFO
 203         {"mkfifo", mkfifo_main, _BB_DIR_USR_BIN},
 204 #endif
 205 #ifdef BB_MKFS_MINIX
 206         {"mkfs.minix", mkfs_minix_main, _BB_DIR_SBIN},
 207 #endif
 208 #ifdef BB_MKNOD
 209         {"mknod", mknod_main, _BB_DIR_BIN},
 210 #endif
 211 #ifdef BB_MKSWAP
 212         {"mkswap", mkswap_main, _BB_DIR_SBIN},
 213 #endif
 214 #ifdef BB_MKTEMP
 215         {"mktemp", mktemp_main, _BB_DIR_BIN},
 216 #endif
 217 #ifdef BB_NC
 218         {"nc", nc_main, _BB_DIR_USR_BIN},
 219 #endif
 220 #ifdef BB_MORE
 221         {"more", more_main, _BB_DIR_BIN},
 222 #endif
 223 #ifdef BB_MOUNT
 224         {"mount", mount_main, _BB_DIR_BIN},
 225 #endif
 226 #ifdef BB_MT
 227         {"mt", mt_main, _BB_DIR_BIN},
 228 #endif
 229 #ifdef BB_CP_MV
 230         {"mv", cp_mv_main, _BB_DIR_BIN},
 231 #endif
 232 #ifdef BB_NSLOOKUP
 233         {"nslookup", nslookup_main, _BB_DIR_USR_BIN},
 234 #endif
 235 #ifdef BB_PING
 236         {"ping", ping_main, _BB_DIR_BIN},
 237 #endif
 238 #ifdef BB_POWEROFF
 239         {"poweroff", poweroff_main, _BB_DIR_SBIN},
 240 #endif
 241 #ifdef BB_PRINTF
 242         {"printf", printf_main, _BB_DIR_USR_BIN},
 243 #endif
 244 #ifdef BB_PS
 245         {"ps", ps_main, _BB_DIR_BIN},
 246 #endif
 247 #ifdef BB_PWD
 248         {"pwd", pwd_main, _BB_DIR_BIN},
 249 #endif
 250 #ifdef BB_REBOOT
 251         {"reboot", reboot_main, _BB_DIR_SBIN},
 252 #endif
 253 #ifdef BB_RM
 254         {"rm", rm_main, _BB_DIR_BIN},
 255 #endif
 256 #ifdef BB_RMDIR
 257         {"rmdir", rmdir_main, _BB_DIR_BIN},
 258 #endif
 259 #ifdef BB_RMMOD
 260         {"rmmod", rmmod_main, _BB_DIR_SBIN},
 261 #endif
 262 #ifdef BB_SED
 263         {"sed", sed_main, _BB_DIR_BIN},
 264 #endif
 265 #ifdef BB_SETKEYCODES
 266         {"setkeycodes", setkeycodes_main, _BB_DIR_USR_BIN},
 267 #endif
 268 #ifdef BB_SH
 269         {"sh", shell_main, _BB_DIR_BIN},
 270 #endif
 271 #ifdef BB_SLEEP
 272         {"sleep", sleep_main, _BB_DIR_BIN},
 273 #endif
 274 #ifdef BB_SORT
 275         {"sort", sort_main, _BB_DIR_BIN},
 276 #endif
 277 #ifdef BB_SYNC
 278         {"sync", sync_main, _BB_DIR_BIN},
 279 #endif
 280 #ifdef BB_SYSLOGD
 281         {"syslogd", syslogd_main, _BB_DIR_SBIN},
 282 #endif
 283 #ifdef BB_SWAPONOFF
 284         {"swapon", swap_on_off_main, _BB_DIR_SBIN},
 285 #endif
 286 #ifdef BB_SWAPONOFF
 287         {"swapoff", swap_on_off_main, _BB_DIR_SBIN},
 288 #endif
 289 #ifdef BB_TAIL
 290         {"tail", tail_main, _BB_DIR_USR_BIN},
 291 #endif
 292 #ifdef BB_TAR
 293         {"tar", tar_main, _BB_DIR_BIN},
 294 #endif
 295 #ifdef BB_TELNET
 296         {"telnet", telnet_main, _BB_DIR_USR_BIN},
 297 #endif
 298 #ifdef BB_TEST
 299         {"test", test_main, _BB_DIR_USR_BIN},
 300 #endif
 301 #ifdef BB_TEE
 302         {"tee", tee_main, _BB_DIR_BIN},
 303 #endif
 304 #ifdef BB_TOUCH
 305         {"touch", touch_main, _BB_DIR_USR_BIN},
 306 #endif
 307 #ifdef BB_TR
 308         {"tr", tr_main, _BB_DIR_USR_BIN},
 309 #endif
 310 #ifdef BB_TRUE_FALSE
 311         {"true", true_main, _BB_DIR_BIN},
 312 #endif
 313 #ifdef BB_TTY
 314         {"tty", tty_main, _BB_DIR_USR_BIN},
 315 #endif
 316 #ifdef BB_UMOUNT
 317         {"umount", umount_main, _BB_DIR_BIN},
 318 #endif
 319 #ifdef BB_UNAME
 320         {"uname", uname_main, _BB_DIR_BIN},
 321 #endif
 322 #ifdef BB_UNIQ
 323         {"uniq", uniq_main, _BB_DIR_USR_BIN},
 324 #endif
 325 #ifdef BB_UPDATE
 326         {"update", update_main, _BB_DIR_SBIN},
 327 #endif
 328 #ifdef BB_UPTIME
 329         {"uptime", uptime_main, _BB_DIR_USR_BIN},
 330 #endif
 331 #ifdef BB_UUENCODE
 332         {"uuencode", uuencode_main, _BB_DIR_USR_BIN},
 333 #endif
 334 #ifdef BB_UUDECODE
 335         {"uudecode", uudecode_main, _BB_DIR_USR_BIN},
 336 #endif
 337 #ifdef BB_USLEEP
 338         {"usleep", usleep_main, _BB_DIR_BIN},
 339 #endif
 340 #ifdef BB_WC
 341         {"wc", wc_main, _BB_DIR_USR_BIN},
 342 #endif
 343 #ifdef BB_WHICH
 344         {"which", which_main, _BB_DIR_USR_BIN},
 345 #endif
 346 #ifdef BB_WHOAMI
 347         {"whoami", whoami_main, _BB_DIR_USR_BIN},
 348 #endif
 349 #ifdef BB_YES
 350         {"yes", yes_main, _BB_DIR_USR_BIN},
 351 #endif
 352 #ifdef BB_GUNZIP
 353         {"zcat", gunzip_main, _BB_DIR_BIN},
 354 #endif
 355 #ifdef BB_TEST
 356         {"[", test_main, _BB_DIR_USR_BIN},
 357 #endif
 358         {0,NULL,0}
 359 };
 360
 361 char *applet_name;
 362
 363 #ifdef BB_FEATURE_INSTALLER
 364 /*
 365  * directory table
 366  *              this should be consistent w/ the enum, internal.h::Location,
 367  *              or else...
 368  */
 369 static char* install_dir[] = {
 370         "/",
 371         "/bin",
 372         "/sbin",
 373         "/usr/bin",
 374         "/usr/sbin",
 375 };
 376
 377 /* abstract link() */
 378 typedef int (*__link_f)(const char *, const char *);
 379
 380 /*
 381  * Where in the filesystem is this busybox?
 382  * [return]
 383  *              malloc'd string w/ full pathname of busybox's location
 384  *              NULL on failure
 385  */
 386 static char *busybox_fullpath()
 387 {
 388         pid_t pid;
 389         char path[256];
 390         char proc[256];
 391         int len;
 392
 393         pid = getpid();
 394         sprintf(proc, "/proc/%d/exe", pid);
 395         len = readlink(proc, path, 256);
 396         if (len != -1) {
 397                 path[len] = 0;
 398         } else {
 399                 errorMsg("%s: %s\n", proc, strerror(errno));
 400                 return NULL;
 401         }
 402         return strdup(path);
 403 }
 404
 405 /* create (sym)links for each applet */
 406 static int install_links(const char *busybox, int use_symbolic_links)
 407 {
 408         __link_f Link = link;
 409
 410         char command[256];
 411         int i;
 412         int rc = 0;
 413
 414         if (use_symbolic_links) Link = symlink;
 415
 416         for (i = 0; applets[i].name != NULL; i++) {
 417                 sprintf (
 418                         command,
 419                         "%s/%s",
 420                         install_dir[applets[i].location],
 421                         applets[i].name
 422                 );
 423 #if 1
 424                 rc |= Link(busybox, command);
 425 #else
 426                 puts(command);
 427 #endif
 428                 if (rc) {
 429                         errorMsg("%s: %s\n", command, strerror(errno));
 430                 }
 431         }
 432         return rc;
 433 }
 434
 435 #if 0
 436 int uninstall_links() ?
 437 #endif
 438 #endif /* BB_FEATURE_INSTALLER */
 439
 440
 441 int main(int argc, char **argv)
 442 {
 443         char                            *s;
 444         const struct BB_applet  *a              = applets;
 445         applet_name = "busybox";
 446
 447 #ifdef BB_FEATURE_INSTALLER
 448         /*
 449          * This style of argument parsing doesn't scale well
 450          * in the event that busybox starts wanting more --options.
 451          * If someone has a cleaner approach, by all means implement it.
 452          */
 453         if (argc > 1 && (strcmp(argv[1], "--install") == 0)) {
 454                 int use_symbolic_links = 0;
 455                 int rc = 0;
 456                 char *busybox;
 457
 458                 /* to use symlinks, or not to use symlinks... */
 459                 if (argc > 2) {
 460                         if ((strcmp(argv[2], "-s") == 0)) {
 461                                 use_symbolic_links = 1;
 462                         }
 463                 }
 464
 465                 /* link */
 466                 busybox = busybox_fullpath();
 467                 if (busybox) {
 468                         install_links(busybox, use_symbolic_links);
 469                         free(busybox);
 470                 } else {
 471                         rc = 1;
 472                 }
 473                 return rc;
 474         }
 475 #endif /* BB_FEATURE_INSTALLER */
 476
 477         for (s = applet_name = argv[0]; *s != '\0';) {
 478                 if (*s++ == '/')
 479                         applet_name = s;
 480         }
 481
 482         *argv = applet_name;
 483
 484 #ifdef BB_SH
 485         /* Add in a special case hack -- whenever **argv == '-'
 486          * (i.e. '-su' or '-sh') always invoke the shell */
 487         if (**argv == '-')
 488                 exit(((*(shell_main)) (argc, argv)));
 489 #endif
 490
 491         while (a->name != 0) {
 492                 if (strcmp(applet_name, a->name) == 0) {
 493                         exit(((*(a->main)) (argc, argv)));
 494                 }
 495                 a++;
 496         }
 497         return(busybox_main(argc, argv));
 498 }
 499
 500
 501 int busybox_main(int argc, char **argv)
 502 {
 503         int col = 0;
 504
 505         argc--;
 506         argv++;
 507
 508         if (been_there_done_that == 1 || argc < 1) {
 509                 const struct BB_applet *a = applets;
 510
 511                 fprintf(stderr, "%s\n\n"
 512                                 "Usage: busybox [function] [arguments]...\n"
 513                                 "   or: [function] [arguments]...\n\n"
 514                                 "\tBusyBox is a multi-call binary that combines many common Unix\n"
 515                                 "\tutilities into a single executable.  Most people will create a\n"
 516                                 "\tlink to busybox for each function they wish to use, and BusyBox\n"
 517                                 "\twill act like whatever it was invoked as.\n"
 518                                 "\nCurrently defined functions:\n", full_version);
 519
 520                 while (a->name != 0) {
 521                         col +=
 522                                 fprintf(stderr, "%s%s", ((col == 0) ? "\t" : ", "),
 523                                                 (a++)->name);
 524                         if (col > 60 && a->name != 0) {
 525                                 fprintf(stderr, ",\n");
 526                                 col = 0;
 527                         }
 528                 }
 529                 fprintf(stderr, "\n\n");
 530                 exit(-1);
 531         }
 532         /* If we've already been here once, exit now */
 533         been_there_done_that = 1;
 534         return (main(argc, argv));
 535 }
 536
 537 /*
 538 Local Variables:
 539 c-file-style: "linux"
 540 c-basic-offset: 4
 541 tab-width: 4
 542 End:
 543 */