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_DOS2UNIX
  68         {"dos2unix", dos2unix_main, _BB_DIR_USR_BIN, dos2unix_usage},
  69 #endif
  70 #ifdef BB_DU
  71         {"du", du_main, _BB_DIR_USR_BIN, du_usage},
  72 #endif
  73 #ifdef BB_DUMPKMAP
  74         {"dumpkmap", dumpkmap_main, _BB_DIR_BIN, dumpkmap_usage},
  75 #endif
  76 #ifdef BB_DUTMP
  77         {"dutmp", dutmp_main, _BB_DIR_USR_SBIN, dutmp_usage},
  78 #endif
  79 #ifdef BB_ECHO
  80         {"echo", echo_main, _BB_DIR_BIN, echo_usage},
  81 #endif
  82 #ifdef BB_EXPR
  83         {"expr", expr_main, _BB_DIR_USR_BIN, expr_usage},
  84 #endif
  85 #ifdef BB_TRUE_FALSE
  86         {"false", false_main, _BB_DIR_BIN, false_usage},
  87 #endif
  88 #ifdef BB_FBSET
  89         {"fbset", fbset_main, _BB_DIR_USR_SBIN, NULL},
  90 #endif
  91 #ifdef BB_FDFLUSH
  92         {"fdflush", fdflush_main, _BB_DIR_BIN, fdflush_usage},
  93 #endif
  94 #ifdef BB_FIND
  95         {"find", find_main, _BB_DIR_USR_BIN, find_usage},
  96 #endif
  97 #ifdef BB_FREE
  98         {"free", free_main, _BB_DIR_USR_BIN, free_usage},
  99 #endif
 100 #ifdef BB_FREERAMDISK
 101         {"freeramdisk", freeramdisk_main, _BB_DIR_SBIN, freeramdisk_usage},
 102 #endif
 103 #ifdef BB_DEALLOCVT
 104         {"deallocvt", deallocvt_main, _BB_DIR_USR_BIN, deallocvt_usage},
 105 #endif
 106 #ifdef BB_FSCK_MINIX
 107         {"fsck.minix", fsck_minix_main, _BB_DIR_SBIN, fsck_minix_usage},
 108 #endif
 109 #ifdef BB_GETOPT
 110         {"getopt", getopt_main, _BB_DIR_BIN},
 111 #endif
 112 #ifdef BB_GREP
 113         {"grep", grep_main, _BB_DIR_BIN, grep_usage},
 114 #endif
 115 #ifdef BB_GUNZIP
 116         {"gunzip", gunzip_main, _BB_DIR_BIN, gunzip_usage},
 117 #endif
 118 #ifdef BB_GZIP
 119         {"gzip", gzip_main, _BB_DIR_BIN, gzip_usage},
 120 #endif
 121 #ifdef BB_HALT
 122         {"halt", halt_main, _BB_DIR_SBIN, halt_usage},
 123 #endif
 124 #ifdef BB_HEAD
 125         {"head", head_main, _BB_DIR_USR_BIN, head_usage},
 126 #endif
 127 #ifdef BB_HOSTID
 128         {"hostid", hostid_main, _BB_DIR_USR_BIN, hostid_usage},
 129 #endif
 130 #ifdef BB_HOSTNAME
 131         {"hostname", hostname_main, _BB_DIR_BIN, hostname_usage},
 132 #endif
 133 #ifdef BB_ID
 134         {"id", id_main, _BB_DIR_USR_BIN, id_usage},
 135 #endif
 136 #ifdef BB_INIT
 137         {"init", init_main, _BB_DIR_SBIN, NULL},
 138 #endif
 139 #ifdef BB_INSMOD
 140         {"insmod", insmod_main, _BB_DIR_SBIN, insmod_usage},
 141 #endif
 142 #ifdef BB_KILL
 143         {"kill", kill_main, _BB_DIR_BIN, kill_usage},
 144 #endif
 145 #ifdef BB_KILLALL
 146         {"killall", kill_main, _BB_DIR_USR_BIN, kill_usage},
 147 #endif
 148 #ifdef BB_LENGTH
 149         {"length", length_main, _BB_DIR_USR_BIN, length_usage},
 150 #endif
 151 #ifdef BB_LINUXRC
 152         {"linuxrc", init_main, _BB_DIR_ROOT, NULL},
 153 #endif
 154 #ifdef BB_LN
 155         {"ln", ln_main, _BB_DIR_BIN, ln_usage},
 156 #endif
 157 #ifdef BB_LOADACM
 158         {"loadacm", loadacm_main, _BB_DIR_USR_BIN, loadacm_usage},
 159 #endif
 160 #ifdef BB_LOADFONT
 161         {"loadfont", loadfont_main, _BB_DIR_USR_BIN, loadfont_usage},
 162 #endif
 163 #ifdef BB_LOADKMAP
 164         {"loadkmap", loadkmap_main, _BB_DIR_SBIN, loadkmap_usage},
 165 #endif
 166 #ifdef BB_LOGGER
 167         {"logger", logger_main, _BB_DIR_USR_BIN, logger_usage},
 168 #endif
 169 #ifdef BB_LOGNAME
 170         {"logname", logname_main, _BB_DIR_USR_BIN, logname_usage},
 171 #endif
 172 #ifdef BB_LS
 173         {"ls", ls_main, _BB_DIR_BIN, ls_usage},
 174 #endif
 175 #ifdef BB_LSMOD
 176         {"lsmod", lsmod_main, _BB_DIR_SBIN, lsmod_usage},
 177 #endif
 178 #ifdef BB_MAKEDEVS
 179         {"makedevs", makedevs_main, _BB_DIR_SBIN, makedevs_usage},
 180 #endif
 181 #ifdef BB_MD5SUM
 182         {"md5sum", md5sum_main, _BB_DIR_USR_BIN, md5sum_usage},
 183 #endif
 184 #ifdef BB_MKDIR
 185         {"mkdir", mkdir_main, _BB_DIR_BIN, mkdir_usage},
 186 #endif
 187 #ifdef BB_MKFIFO
 188         {"mkfifo", mkfifo_main, _BB_DIR_USR_BIN, mkfifo_usage},
 189 #endif
 190 #ifdef BB_MKFS_MINIX
 191         {"mkfs.minix", mkfs_minix_main, _BB_DIR_SBIN, mkfs_minix_usage},
 192 #endif
 193 #ifdef BB_MKNOD
 194         {"mknod", mknod_main, _BB_DIR_BIN, mknod_usage},
 195 #endif
 196 #ifdef BB_MKSWAP
 197         {"mkswap", mkswap_main, _BB_DIR_SBIN, mkswap_usage},
 198 #endif
 199 #ifdef BB_MKTEMP
 200         {"mktemp", mktemp_main, _BB_DIR_BIN, mktemp_usage},
 201 #endif
 202 #ifdef BB_NC
 203         {"nc", nc_main, _BB_DIR_USR_BIN, nc_usage},
 204 #endif
 205 #ifdef BB_MORE
 206         {"more", more_main, _BB_DIR_BIN, more_usage},
 207 #endif
 208 #ifdef BB_MOUNT
 209         {"mount", mount_main, _BB_DIR_BIN, mount_usage},
 210 #endif
 211 #ifdef BB_MT
 212         {"mt", mt_main, _BB_DIR_BIN, mt_usage},
 213 #endif
 214 #ifdef BB_CP_MV
 215         {"mv", cp_mv_main, _BB_DIR_BIN, mv_usage},
 216 #endif
 217 #ifdef BB_NSLOOKUP
 218         {"nslookup", nslookup_main, _BB_DIR_USR_BIN, nslookup_usage},
 219 #endif
 220 #ifdef BB_PING
 221         {"ping", ping_main, _BB_DIR_BIN, ping_usage},
 222 #endif
 223 #ifdef BB_POWEROFF
 224         {"poweroff", poweroff_main, _BB_DIR_SBIN, poweroff_usage},
 225 #endif
 226 #ifdef BB_PRINTF
 227         {"printf", printf_main, _BB_DIR_USR_BIN, printf_usage},
 228 #endif
 229 #ifdef BB_PS
 230         {"ps", ps_main, _BB_DIR_BIN, ps_usage},
 231 #endif
 232 #ifdef BB_PWD
 233         {"pwd", pwd_main, _BB_DIR_BIN, pwd_usage},
 234 #endif
 235 #ifdef BB_RDATE
 236         {"rdate", rdate_main, _BB_DIR_USR_BIN, rdate_usage},
 237 #endif
 238 #ifdef BB_REBOOT
 239         {"reboot", reboot_main, _BB_DIR_SBIN, reboot_usage},
 240 #endif
 241 #ifdef BB_RENICE
 242         {"renice", renice_main, _BB_DIR_USR_BIN},
 243 #endif
 244 #ifdef BB_RESET
 245         {"reset", reset_main, _BB_DIR_USR_BIN, reset_usage},
 246 #endif
 247 #ifdef BB_RM
 248         {"rm", rm_main, _BB_DIR_BIN, rm_usage},
 249 #endif
 250 #ifdef BB_RMDIR
 251         {"rmdir", rmdir_main, _BB_DIR_BIN, rmdir_usage},
 252 #endif
 253 #ifdef BB_RMMOD
 254         {"rmmod", rmmod_main, _BB_DIR_SBIN, rmmod_usage},
 255 #endif
 256 #ifdef BB_SED
 257         {"sed", sed_main, _BB_DIR_BIN, sed_usage},
 258 #endif
 259 #ifdef BB_SETKEYCODES
 260         {"setkeycodes", setkeycodes_main, _BB_DIR_USR_BIN, setkeycodes_usage},
 261 #endif
 262 #ifdef BB_SH
 263         {"sh", shell_main, _BB_DIR_BIN, shell_usage},
 264 #endif
 265 #ifdef BB_SLEEP
 266         {"sleep", sleep_main, _BB_DIR_BIN, sleep_usage},
 267 #endif
 268 #ifdef BB_SORT
 269         {"sort", sort_main, _BB_DIR_USR_BIN, sort_usage},
 270 #endif
 271 #ifdef BB_SYNC
 272         {"sync", sync_main, _BB_DIR_BIN, sync_usage},
 273 #endif
 274 #ifdef BB_SYSLOGD
 275         {"syslogd", syslogd_main, _BB_DIR_SBIN, syslogd_usage},
 276 #endif
 277 #ifdef BB_SWAPONOFF
 278         {"swapon", swap_on_off_main, _BB_DIR_SBIN, swapon_usage},
 279 #endif
 280 #ifdef BB_SWAPONOFF
 281         {"swapoff", swap_on_off_main, _BB_DIR_SBIN, swapoff_usage},
 282 #endif
 283 #ifdef BB_TAIL
 284         {"tail", tail_main, _BB_DIR_USR_BIN, tail_usage},
 285 #endif
 286 #ifdef BB_TAR
 287         {"tar", tar_main, _BB_DIR_BIN, tar_usage},
 288 #endif
 289 #ifdef BB_TELNET
 290         {"telnet", telnet_main, _BB_DIR_USR_BIN, telnet_usage},
 291 #endif
 292 #ifdef BB_TEST
 293         {"test", test_main, _BB_DIR_USR_BIN, test_usage},
 294 #endif
 295 #ifdef BB_TEE
 296         {"tee", tee_main, _BB_DIR_USR_BIN, tee_usage},
 297 #endif
 298 #ifdef BB_TOUCH
 299         {"touch", touch_main, _BB_DIR_BIN, touch_usage},
 300 #endif
 301 #ifdef BB_TR
 302         {"tr", tr_main, _BB_DIR_USR_BIN, tr_usage},
 303 #endif
 304 #ifdef BB_TRUE_FALSE
 305         {"true", true_main, _BB_DIR_BIN, true_usage},
 306 #endif
 307 #ifdef BB_TTY
 308         {"tty", tty_main, _BB_DIR_USR_BIN, tty_usage},
 309 #endif
 310 #ifdef BB_UMOUNT
 311         {"umount", umount_main, _BB_DIR_BIN, umount_usage},
 312 #endif
 313 #ifdef BB_UNAME
 314         {"uname", uname_main, _BB_DIR_BIN, uname_usage},
 315 #endif
 316 #ifdef BB_UNIQ
 317         {"uniq", uniq_main, _BB_DIR_USR_BIN, uniq_usage},
 318 #endif
 319 #ifdef BB_UNIX2DOS
 320         {"unix2dos", unix2dos_main, _BB_DIR_USR_BIN, unix2dos_usage},
 321 #endif
 322 #ifdef BB_UNRPM
 323         {"unrpm", unrpm_main, _BB_DIR_USR_BIN, unrpm_usage},
 324 #endif
 325 #ifdef BB_UPDATE
 326         {"update", update_main, _BB_DIR_SBIN, update_usage},
 327 #endif
 328 #ifdef BB_UPTIME
 329         {"uptime", uptime_main, _BB_DIR_USR_BIN, uptime_usage},
 330 #endif
 331 #ifdef BB_UUENCODE
 332         {"uuencode", uuencode_main, _BB_DIR_USR_BIN, uuencode_usage},
 333 #endif
 334 #ifdef BB_UUDECODE
 335         {"uudecode", uudecode_main, _BB_DIR_USR_BIN, uudecode_usage},
 336 #endif
 337 #ifdef BB_USLEEP
 338         {"usleep", usleep_main, _BB_DIR_BIN, usleep_usage},
 339 #endif
 340 #ifdef BB_WC
 341         {"wc", wc_main, _BB_DIR_USR_BIN, wc_usage},
 342 #endif
 343 #ifdef BB_WGET
 344         {"wget", wget_main, _BB_DIR_USR_BIN, wget_usage},
 345 #endif
 346 #ifdef BB_WHICH
 347         {"which", which_main, _BB_DIR_USR_BIN, which_usage},
 348 #endif
 349 #ifdef BB_WHOAMI
 350         {"whoami", whoami_main, _BB_DIR_USR_BIN, whoami_usage},
 351 #endif
 352 #ifdef BB_XARGS
 353         {"xargs", xargs_main, _BB_DIR_USR_BIN, xargs_usage},
 354 #endif
 355 #ifdef BB_YES
 356         {"yes", yes_main, _BB_DIR_USR_BIN, yes_usage},
 357 #endif
 358 #ifdef BB_GUNZIP
 359         {"zcat", gunzip_main, _BB_DIR_BIN, gunzip_usage},
 360 #endif
 361 #ifdef BB_TEST
 362         {"[", test_main, _BB_DIR_USR_BIN, test_usage},
 363 #endif
 364         {0,NULL,0,NULL}
 365 };
 366
 367 const char *applet_name;
 368
 369 #ifdef BB_FEATURE_INSTALLER
 370 /*
 371  * directory table
 372  *              this should be consistent w/ the enum, internal.h::Location,
 373  *              or else...
 374  */
 375 static char* install_dir[] = {
 376         "/",
 377         "/bin",
 378         "/sbin",
 379         "/usr/bin",
 380         "/usr/sbin",
 381 };
 382
 383 /* abstract link() */
 384 typedef int (*__link_f)(const char *, const char *);
 385
 386 /*
 387  * Where in the filesystem is this busybox?
 388  * [return]
 389  *              malloc'd string w/ full pathname of busybox's location
 390  *              NULL on failure
 391  */
 392 static char *busybox_fullpath()
 393 {
 394         pid_t pid;
 395         char path[256];
 396         char proc[256];
 397         int len;
 398
 399         pid = getpid();
 400         sprintf(proc, "/proc/%d/exe", pid);
 401         len = readlink(proc, path, 256);
 402         if (len != -1) {
 403                 path[len] = 0;
 404         } else {
 405                 errorMsg("%s: %s\n", proc, strerror(errno));
 406                 return NULL;
 407         }
 408         return strdup(path);
 409 }
 410
 411 /* create (sym)links for each applet */
 412 static int install_links(const char *busybox, int use_symbolic_links)
 413 {
 414         __link_f Link = link;
 415
 416         char command[256];
 417         int i;
 418         int rc = 0;
 419
 420         if (use_symbolic_links) Link = symlink;
 421
 422         for (i = 0; applets[i].name != NULL; i++) {
 423                 sprintf (
 424                         command,
 425                         "%s/%s",
 426                         install_dir[applets[i].location],
 427                         applets[i].name
 428                 );
 429 #if 1
 430                 rc |= Link(busybox, command);
 431 #else
 432                 puts(command);
 433 #endif
 434                 if (rc) {
 435                         errorMsg("%s: %s\n", command, strerror(errno));
 436                 }
 437         }
 438         return rc;
 439 }
 440
 441 #endif /* BB_FEATURE_INSTALLER */
 442
 443
 444 int main(int argc, char **argv)
 445 {
 446         const char                              *s;
 447         const struct BB_applet  *a              = applets;
 448         applet_name = "busybox";
 449
 450 #ifdef BB_FEATURE_INSTALLER
 451         /*
 452          * This style of argument parsing doesn't scale well
 453          * in the event that busybox starts wanting more --options.
 454          * If someone has a cleaner approach, by all means implement it.
 455          */
 456         if (argc > 1 && (strcmp(argv[1], "--install") == 0)) {
 457                 int use_symbolic_links = 0;
 458                 int rc = 0;
 459                 char *busybox;
 460
 461                 /* to use symlinks, or not to use symlinks... */
 462                 if (argc > 2) {
 463                         if ((strcmp(argv[2], "-s") == 0)) {
 464                                 use_symbolic_links = 1;
 465                         }
 466                 }
 467
 468                 /* link */
 469                 busybox = busybox_fullpath();
 470                 if (busybox) {
 471                         install_links(busybox, use_symbolic_links);
 472                         free(busybox);
 473                 } else {
 474                         rc = 1;
 475                 }
 476                 return rc;
 477         }
 478 #endif /* BB_FEATURE_INSTALLER */
 479
 480         for (s = applet_name = argv[0]; *s != '\0';) {
 481                 if (*s++ == '/')
 482                         applet_name = s;
 483         }
 484
 485         *argv = (char*)applet_name;
 486
 487 #ifdef BB_SH
 488         /* Add in a special case hack -- whenever **argv == '-'
 489          * (i.e. '-su' or '-sh') always invoke the shell */
 490         if (**argv == '-' && *(*argv+1)!= '-') {
 491                 exit(((*(shell_main)) (argc, argv)));
 492         }
 493 #endif
 494
 495         while (a->name != 0) {
 496                 if (strcmp(applet_name, a->name) == 0) {
 497                         if (a->usage && argv[1] && strcmp(argv[1], "--help") == 0)
 498                                 usage(a->usage);
 499                         exit(((*(a->main)) (argc, argv)));
 500                 }
 501                 a++;
 502         }
 503         return(busybox_main(argc, argv));
 504 }
 505
 506
 507 int busybox_main(int argc, char **argv)
 508 {
 509         int col = 0;
 510
 511         argc--;
 512         argv++;
 513
 514         if (been_there_done_that == 1 || argc < 1) {
 515                 const struct BB_applet *a = applets;
 516
 517                 fprintf(stderr, "%s\n\n"
 518                                 "Usage: busybox [function] [arguments]...\n"
 519                                 "   or: [function] [arguments]...\n\n"
 520                                 "\tBusyBox is a multi-call binary that combines many common Unix\n"
 521                                 "\tutilities into a single executable.  Most people will create a\n"
 522                                 "\tlink to busybox for each function they wish to use, and BusyBox\n"
 523                                 "\twill act like whatever it was invoked as.\n"
 524                                 "\nCurrently defined functions:\n", full_version);
 525
 526                 while (a->name != 0) {
 527                         col +=
 528                                 fprintf(stderr, "%s%s", ((col == 0) ? "\t" : ", "),
 529                                                 (a++)->name);
 530                         if (col > 60 && a->name != 0) {
 531                                 fprintf(stderr, ",\n");
 532                                 col = 0;
 533                         }
 534                 }
 535                 fprintf(stderr, "\n\n");
 536                 exit(-1);
 537         }
 538         /* If we've already been here once, exit now */
 539         been_there_done_that = 1;
 540         return (main(argc, argv));
 541 }
 542
 543 /*
 544 Local Variables:
 545 c-file-style: "linux"
 546 c-basic-offset: 4
 547 tab-width: 4
 548 End:
 549 */