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 #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 const struct BB_applet applets[] = {
  14
  15 #ifdef BB_AR
  16         {"ar", ar_main, _BB_DIR_USR_BIN, ar_usage},
  17 #endif
  18 #ifdef BB_BASENAME
  19         {"basename", basename_main, _BB_DIR_USR_BIN, basename_usage},
  20 #endif
  21         {"busybox", busybox_main, _BB_DIR_BIN, NULL},
  22 #ifdef BB_CAT
  23         {"cat", cat_main, _BB_DIR_BIN, cat_usage},
  24 #endif
  25 #ifdef BB_CHMOD_CHOWN_CHGRP
  26         {"chgrp", chmod_chown_chgrp_main, _BB_DIR_BIN, chgrp_usage},
  27 #endif
  28 #ifdef BB_CHMOD_CHOWN_CHGRP
  29         {"chmod", chmod_chown_chgrp_main, _BB_DIR_BIN, chmod_usage},
  30 #endif
  31 #ifdef BB_CHMOD_CHOWN_CHGRP
  32         {"chown", chmod_chown_chgrp_main, _BB_DIR_BIN, chown_usage},
  33 #endif
  34 #ifdef BB_CHROOT
  35         {"chroot", chroot_main, _BB_DIR_USR_SBIN, chroot_usage},
  36 #endif
  37 #ifdef BB_CLEAR
  38         {"clear", clear_main, _BB_DIR_USR_BIN, clear_usage},
  39 #endif
  40 #ifdef BB_CHVT
  41         {"chvt", chvt_main, _BB_DIR_USR_BIN, chvt_usage},
  42 #endif
  43 #ifdef BB_CP_MV
  44         {"cp", cp_mv_main, _BB_DIR_BIN, cp_usage},
  45 #endif
  46 #ifdef BB_CUT
  47         {"cut", cut_main, _BB_DIR_USR_BIN, cut_usage},
  48 #endif
  49 #ifdef BB_DATE
  50         {"date", date_main, _BB_DIR_BIN, date_usage},
  51 #endif
  52 #ifdef BB_DC
  53         {"dc", dc_main, _BB_DIR_USR_BIN, dc_usage},
  54 #endif
  55 #ifdef BB_DD
  56         {"dd", dd_main, _BB_DIR_BIN, dd_usage},
  57 #endif
  58 #ifdef BB_DF
  59         {"df", df_main, _BB_DIR_BIN, df_usage},
  60 #endif
  61 #ifdef BB_DIRNAME
  62         {"dirname", dirname_main, _BB_DIR_USR_BIN, dirname_usage},
  63 #endif
  64 #ifdef BB_DMESG
  65         {"dmesg", dmesg_main, _BB_DIR_BIN, dmesg_usage},
  66 #endif
  67 #ifdef BB_DU
  68         {"du", du_main, _BB_DIR_USR_BIN, du_usage},
  69 #endif
  70 #ifdef BB_DUMPKMAP
  71         {"dumpkmap", dumpkmap_main, _BB_DIR_BIN, dumpkmap_usage},
  72 #endif
  73 #ifdef BB_DUTMP
  74         {"dutmp", dutmp_main, _BB_DIR_USR_SBIN, dutmp_usage},
  75 #endif
  76 #ifdef BB_ECHO
  77         {"echo", echo_main, _BB_DIR_BIN, echo_usage},
  78 #endif
  79 #ifdef BB_TRUE_FALSE
  80         {"false", false_main, _BB_DIR_BIN, false_usage},
  81 #endif
  82 #ifdef BB_FBSET
  83         {"fbset", fbset_main, _BB_DIR_USR_SBIN, NULL},
  84 #endif
  85 #ifdef BB_FDFLUSH
  86         {"fdflush", fdflush_main, _BB_DIR_BIN, fdflush_usage},
  87 #endif
  88 #ifdef BB_FIND
  89         {"find", find_main, _BB_DIR_USR_BIN, find_usage},
  90 #endif
  91 #ifdef BB_FREE
  92         {"free", free_main, _BB_DIR_USR_BIN, free_usage},
  93 #endif
  94 #ifdef BB_FREERAMDISK
  95         {"freeramdisk", freeramdisk_main, _BB_DIR_SBIN, freeramdisk_usage},
  96 #endif
  97 #ifdef BB_DEALLOCVT
  98         {"deallocvt", deallocvt_main, _BB_DIR_USR_BIN, deallocvt_usage},
  99 #endif
 100 #ifdef BB_FSCK_MINIX
 101         {"fsck.minix", fsck_minix_main, _BB_DIR_SBIN, fsck_minix_usage},
 102 #endif
 103 #ifdef BB_GETOPT
 104         {"getopt", getopt_main, _BB_DIR_BIN},
 105 #endif
 106 #ifdef BB_GREP
 107         {"grep", grep_main, _BB_DIR_BIN, grep_usage},
 108 #endif
 109 #ifdef BB_GUNZIP
 110         {"gunzip", gunzip_main, _BB_DIR_BIN, gunzip_usage},
 111 #endif
 112 #ifdef BB_GZIP
 113         {"gzip", gzip_main, _BB_DIR_BIN, gzip_usage},
 114 #endif
 115 #ifdef BB_HALT
 116         {"halt", halt_main, _BB_DIR_SBIN, halt_usage},
 117 #endif
 118 #ifdef BB_HEAD
 119         {"head", head_main, _BB_DIR_USR_BIN, head_usage},
 120 #endif
 121 #ifdef BB_HOSTID
 122         {"hostid", hostid_main, _BB_DIR_USR_BIN, hostid_usage},
 123 #endif
 124 #ifdef BB_HOSTNAME
 125         {"hostname", hostname_main, _BB_DIR_BIN, hostname_usage},
 126 #endif
 127 #ifdef BB_ID
 128         {"id", id_main, _BB_DIR_USR_BIN, id_usage},
 129 #endif
 130 #ifdef BB_INIT
 131         {"init", init_main, _BB_DIR_SBIN, NULL},
 132 #endif
 133 #ifdef BB_INSMOD
 134         {"insmod", insmod_main, _BB_DIR_SBIN, insmod_usage},
 135 #endif
 136 #ifdef BB_KILL
 137         {"kill", kill_main, _BB_DIR_BIN, kill_usage},
 138 #endif
 139 #ifdef BB_KILLALL
 140         {"killall", kill_main, _BB_DIR_USR_BIN, kill_usage},
 141 #endif
 142 #ifdef BB_LENGTH
 143         {"length", length_main, _BB_DIR_USR_BIN, length_usage},
 144 #endif
 145 #ifdef BB_LINUXRC
 146         {"linuxrc", init_main, _BB_DIR_ROOT, NULL},
 147 #endif
 148 #ifdef BB_LN
 149         {"ln", ln_main, _BB_DIR_BIN, ln_usage},
 150 #endif
 151 #ifdef BB_LOADACM
 152         {"loadacm", loadacm_main, _BB_DIR_USR_BIN, loadacm_usage},
 153 #endif
 154 #ifdef BB_LOADFONT
 155         {"loadfont", loadfont_main, _BB_DIR_USR_BIN, loadfont_usage},
 156 #endif
 157 #ifdef BB_LOADKMAP
 158         {"loadkmap", loadkmap_main, _BB_DIR_SBIN, loadkmap_usage},
 159 #endif
 160 #ifdef BB_LOGGER
 161         {"logger", logger_main, _BB_DIR_USR_BIN, logger_usage},
 162 #endif
 163 #ifdef BB_LOGNAME
 164         {"logname", logname_main, _BB_DIR_USR_BIN, logname_usage},
 165 #endif
 166 #ifdef BB_LS
 167         {"ls", ls_main, _BB_DIR_BIN, ls_usage},
 168 #endif
 169 #ifdef BB_LSMOD
 170         {"lsmod", lsmod_main, _BB_DIR_SBIN, lsmod_usage},
 171 #endif
 172 #ifdef BB_MAKEDEVS
 173         {"makedevs", makedevs_main, _BB_DIR_SBIN, makedevs_usage},
 174 #endif
 175 #ifdef BB_MD5SUM
 176         {"md5sum", md5sum_main, _BB_DIR_USR_BIN, md5sum_usage},
 177 #endif
 178 #ifdef BB_MKDIR
 179         {"mkdir", mkdir_main, _BB_DIR_BIN, mkdir_usage},
 180 #endif
 181 #ifdef BB_MKFIFO
 182         {"mkfifo", mkfifo_main, _BB_DIR_USR_BIN, mkfifo_usage},
 183 #endif
 184 #ifdef BB_MKFS_MINIX
 185         {"mkfs.minix", mkfs_minix_main, _BB_DIR_SBIN, mkfs_minix_usage},
 186 #endif
 187 #ifdef BB_MKNOD
 188         {"mknod", mknod_main, _BB_DIR_BIN, mknod_usage},
 189 #endif
 190 #ifdef BB_MKSWAP
 191         {"mkswap", mkswap_main, _BB_DIR_SBIN, mkswap_usage},
 192 #endif
 193 #ifdef BB_MKTEMP
 194         {"mktemp", mktemp_main, _BB_DIR_BIN, mktemp_usage},
 195 #endif
 196 #ifdef BB_NC
 197         {"nc", nc_main, _BB_DIR_USR_BIN, nc_usage},
 198 #endif
 199 #ifdef BB_MORE
 200         {"more", more_main, _BB_DIR_BIN, more_usage},
 201 #endif
 202 #ifdef BB_MOUNT
 203         {"mount", mount_main, _BB_DIR_BIN, mount_usage},
 204 #endif
 205 #ifdef BB_MT
 206         {"mt", mt_main, _BB_DIR_BIN, mt_usage},
 207 #endif
 208 #ifdef BB_CP_MV
 209         {"mv", cp_mv_main, _BB_DIR_BIN, mv_usage},
 210 #endif
 211 #ifdef BB_NSLOOKUP
 212         {"nslookup", nslookup_main, _BB_DIR_USR_BIN, nslookup_usage},
 213 #endif
 214 #ifdef BB_PING
 215         {"ping", ping_main, _BB_DIR_BIN, ping_usage},
 216 #endif
 217 #ifdef BB_POWEROFF
 218         {"poweroff", poweroff_main, _BB_DIR_SBIN, poweroff_usage},
 219 #endif
 220 #ifdef BB_PRINTF
 221         {"printf", printf_main, _BB_DIR_USR_BIN, printf_usage},
 222 #endif
 223 #ifdef BB_PS
 224         {"ps", ps_main, _BB_DIR_BIN, ps_usage},
 225 #endif
 226 #ifdef BB_PWD
 227         {"pwd", pwd_main, _BB_DIR_BIN, pwd_usage},
 228 #endif
 229 #ifdef BB_RDATE
 230         {"rdate", rdate_main, _BB_DIR_USR_BIN, rdate_usage},
 231 #endif
 232 #ifdef BB_REBOOT
 233         {"reboot", reboot_main, _BB_DIR_SBIN, reboot_usage},
 234 #endif
 235 #ifdef BB_RENICE
 236         {"renice", renice_main, _BB_DIR_USR_BIN},
 237 #endif
 238 #ifdef BB_RESET
 239         {"reset", reset_main, _BB_DIR_USR_BIN, reset_usage},
 240 #endif
 241 #ifdef BB_RM
 242         {"rm", rm_main, _BB_DIR_BIN, rm_usage},
 243 #endif
 244 #ifdef BB_RMDIR
 245         {"rmdir", rmdir_main, _BB_DIR_BIN, rmdir_usage},
 246 #endif
 247 #ifdef BB_RMMOD
 248         {"rmmod", rmmod_main, _BB_DIR_SBIN, rmmod_usage},
 249 #endif
 250 #ifdef BB_SED
 251         {"sed", sed_main, _BB_DIR_BIN, sed_usage},
 252 #endif
 253 #ifdef BB_SETKEYCODES
 254         {"setkeycodes", setkeycodes_main, _BB_DIR_USR_BIN, setkeycodes_usage},
 255 #endif
 256 #ifdef BB_SH
 257         {"sh", shell_main, _BB_DIR_BIN, shell_usage},
 258 #endif
 259 #ifdef BB_SLEEP
 260         {"sleep", sleep_main, _BB_DIR_BIN, sleep_usage},
 261 #endif
 262 #ifdef BB_SORT
 263         {"sort", sort_main, _BB_DIR_USR_BIN, sort_usage},
 264 #endif
 265 #ifdef BB_SYNC
 266         {"sync", sync_main, _BB_DIR_BIN, sync_usage},
 267 #endif
 268 #ifdef BB_SYSLOGD
 269         {"syslogd", syslogd_main, _BB_DIR_SBIN, syslogd_usage},
 270 #endif
 271 #ifdef BB_SWAPONOFF
 272         {"swapon", swap_on_off_main, _BB_DIR_SBIN, swapon_usage},
 273 #endif
 274 #ifdef BB_SWAPONOFF
 275         {"swapoff", swap_on_off_main, _BB_DIR_SBIN, swapoff_usage},
 276 #endif
 277 #ifdef BB_TAIL
 278         {"tail", tail_main, _BB_DIR_USR_BIN, tail_usage},
 279 #endif
 280 #ifdef BB_TAR
 281         {"tar", tar_main, _BB_DIR_BIN, tar_usage},
 282 #endif
 283 #ifdef BB_TELNET
 284         {"telnet", telnet_main, _BB_DIR_USR_BIN, telnet_usage},
 285 #endif
 286 #ifdef BB_TEST
 287         {"test", test_main, _BB_DIR_USR_BIN, test_usage},
 288 #endif
 289 #ifdef BB_TEE
 290         {"tee", tee_main, _BB_DIR_USR_BIN, tee_usage},
 291 #endif
 292 #ifdef BB_TOUCH
 293         {"touch", touch_main, _BB_DIR_BIN, touch_usage},
 294 #endif
 295 #ifdef BB_TR
 296         {"tr", tr_main, _BB_DIR_USR_BIN, tr_usage},
 297 #endif
 298 #ifdef BB_TRUE_FALSE
 299         {"true", true_main, _BB_DIR_BIN, true_usage},
 300 #endif
 301 #ifdef BB_TTY
 302         {"tty", tty_main, _BB_DIR_USR_BIN, tty_usage},
 303 #endif
 304 #ifdef BB_UMOUNT
 305         {"umount", umount_main, _BB_DIR_BIN, umount_usage},
 306 #endif
 307 #ifdef BB_UNAME
 308         {"uname", uname_main, _BB_DIR_BIN, uname_usage},
 309 #endif
 310 #ifdef BB_UNIQ
 311         {"uniq", uniq_main, _BB_DIR_USR_BIN, uniq_usage},
 312 #endif
 313 #ifdef BB_UPDATE
 314         {"update", update_main, _BB_DIR_SBIN, update_usage},
 315 #endif
 316 #ifdef BB_UPTIME
 317         {"uptime", uptime_main, _BB_DIR_USR_BIN, uptime_usage},
 318 #endif
 319 #ifdef BB_UUENCODE
 320         {"uuencode", uuencode_main, _BB_DIR_USR_BIN, uuencode_usage},
 321 #endif
 322 #ifdef BB_UUDECODE
 323         {"uudecode", uudecode_main, _BB_DIR_USR_BIN, uudecode_usage},
 324 #endif
 325 #ifdef BB_USLEEP
 326         {"usleep", usleep_main, _BB_DIR_BIN, usleep_usage},
 327 #endif
 328 #ifdef BB_WC
 329         {"wc", wc_main, _BB_DIR_USR_BIN, wc_usage},
 330 #endif
 331 #ifdef BB_WHICH
 332         {"which", which_main, _BB_DIR_USR_BIN, which_usage},
 333 #endif
 334 #ifdef BB_WHOAMI
 335         {"whoami", whoami_main, _BB_DIR_USR_BIN, whoami_usage},
 336 #endif
 337 #ifdef BB_YES
 338         {"yes", yes_main, _BB_DIR_USR_BIN, yes_usage},
 339 #endif
 340 #ifdef BB_GUNZIP
 341         {"zcat", gunzip_main, _BB_DIR_BIN, gunzip_usage},
 342 #endif
 343 #ifdef BB_TEST
 344         {"[", test_main, _BB_DIR_USR_BIN, test_usage},
 345 #endif
 346         {0,NULL,0,NULL}
 347 };
 348
 349 const char *applet_name;
 350
 351 #ifdef BB_FEATURE_INSTALLER
 352 /*
 353  * directory table
 354  *              this should be consistent w/ the enum, internal.h::Location,
 355  *              or else...
 356  */
 357 static char* install_dir[] = {
 358         "/",
 359         "/bin",
 360         "/sbin",
 361         "/usr/bin",
 362         "/usr/sbin",
 363 };
 364
 365 /* abstract link() */
 366 typedef int (*__link_f)(const char *, const char *);
 367
 368 /*
 369  * Where in the filesystem is this busybox?
 370  * [return]
 371  *              malloc'd string w/ full pathname of busybox's location
 372  *              NULL on failure
 373  */
 374 static char *busybox_fullpath()
 375 {
 376         pid_t pid;
 377         char path[256];
 378         char proc[256];
 379         int len;
 380
 381         pid = getpid();
 382         sprintf(proc, "/proc/%d/exe", pid);
 383         len = readlink(proc, path, 256);
 384         if (len != -1) {
 385                 path[len] = 0;
 386         } else {
 387                 errorMsg("%s: %s\n", proc, strerror(errno));
 388                 return NULL;
 389         }
 390         return strdup(path);
 391 }
 392
 393 /* create (sym)links for each applet */
 394 static int install_links(const char *busybox, int use_symbolic_links)
 395 {
 396         __link_f Link = link;
 397
 398         char command[256];
 399         int i;
 400         int rc = 0;
 401
 402         if (use_symbolic_links) Link = symlink;
 403
 404         for (i = 0; applets[i].name != NULL; i++) {
 405                 sprintf (
 406                         command,
 407                         "%s/%s",
 408                         install_dir[applets[i].location],
 409                         applets[i].name
 410                 );
 411 #if 1
 412                 rc |= Link(busybox, command);
 413 #else
 414                 puts(command);
 415 #endif
 416                 if (rc) {
 417                         errorMsg("%s: %s\n", command, strerror(errno));
 418                 }
 419         }
 420         return rc;
 421 }
 422
 423 #endif /* BB_FEATURE_INSTALLER */
 424
 425
 426 int main(int argc, char **argv)
 427 {
 428         const char                              *s;
 429         const struct BB_applet  *a              = applets;
 430         applet_name = "busybox";
 431
 432 #ifdef BB_FEATURE_INSTALLER
 433         /*
 434          * This style of argument parsing doesn't scale well
 435          * in the event that busybox starts wanting more --options.
 436          * If someone has a cleaner approach, by all means implement it.
 437          */
 438         if (argc > 1 && (strcmp(argv[1], "--install") == 0)) {
 439                 int use_symbolic_links = 0;
 440                 int rc = 0;
 441                 char *busybox;
 442
 443                 /* to use symlinks, or not to use symlinks... */
 444                 if (argc > 2) {
 445                         if ((strcmp(argv[2], "-s") == 0)) {
 446                                 use_symbolic_links = 1;
 447                         }
 448                 }
 449
 450                 /* link */
 451                 busybox = busybox_fullpath();
 452                 if (busybox) {
 453                         install_links(busybox, use_symbolic_links);
 454                         free(busybox);
 455                 } else {
 456                         rc = 1;
 457                 }
 458                 return rc;
 459         }
 460 #endif /* BB_FEATURE_INSTALLER */
 461
 462         for (s = applet_name = argv[0]; *s != '\0';) {
 463                 if (*s++ == '/')
 464                         applet_name = s;
 465         }
 466
 467         *argv = (char*)applet_name;
 468
 469 #ifdef BB_SH
 470         /* Add in a special case hack -- whenever **argv == '-'
 471          * (i.e. '-su' or '-sh') always invoke the shell */
 472         if (**argv == '-' && *(*argv+1)!= '-') {
 473                 exit(((*(shell_main)) (argc, argv)));
 474         }
 475 #endif
 476
 477         while (a->name != 0) {
 478                 if (strcmp(applet_name, a->name) == 0) {
 479                         if (a->usage && argv[1] && strcmp(argv[1], "--help") == 0)
 480                                 usage(a->usage);
 481                         exit(((*(a->main)) (argc, argv)));
 482                 }
 483                 a++;
 484         }
 485         return(busybox_main(argc, argv));
 486 }
 487
 488
 489 int busybox_main(int argc, char **argv)
 490 {
 491         int col = 0;
 492
 493         argc--;
 494         argv++;
 495
 496         if (been_there_done_that == 1 || argc < 1) {
 497                 const struct BB_applet *a = applets;
 498
 499                 fprintf(stderr, "%s\n\n"
 500                                 "Usage: busybox [function] [arguments]...\n"
 501                                 "   or: [function] [arguments]...\n\n"
 502                                 "\tBusyBox is a multi-call binary that combines many common Unix\n"
 503                                 "\tutilities into a single executable.  Most people will create a\n"
 504                                 "\tlink to busybox for each function they wish to use, and BusyBox\n"
 505                                 "\twill act like whatever it was invoked as.\n"
 506                                 "\nCurrently defined functions:\n", full_version);
 507
 508                 while (a->name != 0) {
 509                         col +=
 510                                 fprintf(stderr, "%s%s", ((col == 0) ? "\t" : ", "),
 511                                                 (a++)->name);
 512                         if (col > 60 && a->name != 0) {
 513                                 fprintf(stderr, ",\n");
 514                                 col = 0;
 515                         }
 516                 }
 517                 fprintf(stderr, "\n\n");
 518                 exit(-1);
 519         }
 520         /* If we've already been here once, exit now */
 521         been_there_done_that = 1;
 522         return (main(argc, argv));
 523 }
 524
 525 /*
 526 Local Variables:
 527 c-file-style: "linux"
 528 c-basic-offset: 4
 529 tab-width: 4
 530 End:
 531 */