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
  38 static const struct Applet applets[] = {
  39
  40 #ifdef BB_BASENAME                              //usr/bin/basename
  41         {"basename", basename_main},
  42 #endif
  43 #ifdef BB_BUSYBOX                               //bin
  44         {"busybox", busybox_main},
  45 #endif
  46 #ifdef BB_BLOCK_DEVICE                  //sbin
  47         {"block_device", block_device_main},
  48 #endif
  49 #ifdef BB_CAT                                   //bin
  50         {"cat", cat_main},
  51 #endif
  52 #ifdef BB_CHMOD_CHOWN_CHGRP             //bin
  53         {"chmod", chmod_chown_chgrp_main},
  54         {"chown", chmod_chown_chgrp_main},
  55         {"chgrp", chmod_chown_chgrp_main},
  56 #endif
  57 #ifdef BB_CHROOT                                //sbin
  58         {"chroot", chroot_main},
  59 #endif
  60 #ifdef BB_CLEAR                                 //usr/bin
  61         {"clear", clear_main},
  62 #endif
  63 #ifdef BB_CHVT                                  //usr/bin
  64         {"chvt", chvt_main},
  65 #endif
  66 #ifdef BB_CP_MV                                 //bin
  67         {"cp", cp_mv_main},
  68         {"mv", cp_mv_main},
  69 #endif
  70 #ifdef BB_DATE                                  //bin
  71         {"date", date_main},
  72 #endif
  73 #ifdef BB_DD                                    //bin
  74         {"dd", dd_main},
  75 #endif
  76 #ifdef BB_DF                                    //bin
  77         {"df", df_main},
  78 #endif
  79 #ifdef BB_DMESG                                 //bin
  80         {"dmesg", dmesg_main},
  81 #endif
  82 #ifdef BB_DU                                    //bin
  83         {"du", du_main},
  84 #endif
  85 #ifdef BB_DUTMP                                 //usr/sbin
  86         {"dutmp", dutmp_main},
  87 #endif
  88 #ifdef BB_FBSET                                 //usr/sbin
  89         {"fbset", fbset_main},
  90 #endif
  91 #ifdef BB_FDFLUSH                               //bin
  92         {"fdflush", fdflush_main},
  93 #endif
  94 #ifdef BB_FIND                                  //usr/bin
  95         {"find", find_main},
  96 #endif
  97 #ifdef BB_FREE                                  //usr/bin
  98         {"free", free_main},
  99 #endif
 100 #ifdef BB_DEALLOCVT                             //usr/bin
 101         {"deallocvt", deallocvt_main},
 102 #endif
 103 #ifdef BB_FSCK_MINIX                    //sbin
 104         {"fsck.minix", fsck_minix_main},
 105 #endif
 106 #ifdef BB_MKFS_MINIX                    //sbin
 107         {"mkfs.minix", mkfs_minix_main},
 108 #endif
 109 #ifdef BB_GREP                                  //bin
 110         {"grep", grep_main},
 111 #endif
 112 #ifdef BB_HALT                                  //sbin
 113         {"halt", halt_main},
 114 #endif
 115 #ifdef BB_HEAD                                  //bin
 116         {"head", head_main},
 117 #endif
 118 #ifdef BB_HOSTID                                //usr/bin
 119         {"hostid", hostid_main},
 120 #endif
 121 #ifdef BB_HOSTNAME                              //bin
 122         {"hostname", hostname_main},
 123 #endif
 124 #ifdef BB_INIT                                  //sbin
 125         {"init", init_main},
 126 #endif
 127 #ifdef BB_INSMOD                                //sbin
 128         {"insmod", insmod_main},
 129 #endif
 130 #ifdef BB_FEATURE_LINUXRC               //
 131         {"linuxrc", init_main},
 132 #endif
 133 #ifdef BB_KILL                                  //bin
 134         {"kill", kill_main},
 135 #endif
 136 #ifdef BB_LENGTH                                //usr/bin
 137         {"length", length_main},
 138 #endif
 139 #ifdef BB_LN                                    //bin
 140         {"ln", ln_main},
 141 #endif
 142 #ifdef BB_LOADACM                               //usr/bin
 143         {"loadacm", loadacm_main},
 144 #endif
 145 #ifdef BB_LOADFONT                              //usr/bin
 146         {"loadfont", loadfont_main},
 147 #endif
 148 #ifdef BB_LOADKMAP                              //sbin
 149         {"loadkmap", loadkmap_main},
 150 #endif
 151 #ifdef BB_LS                                    //bin
 152         {"ls", ls_main},
 153 #endif
 154 #ifdef BB_LSMOD                                 //sbin
 155         {"lsmod", lsmod_main},
 156 #endif
 157 #ifdef BB_MAKEDEVS                              //sbin
 158         {"makedevs", makedevs_main},
 159 #endif
 160 #ifdef BB_MATH                                  //usr/bin
 161         {"math", math_main},
 162 #endif
 163 #ifdef BB_MKDIR                                 //bin
 164         {"mkdir", mkdir_main},
 165 #endif
 166 #ifdef BB_MKFIFO                                //usr/bin
 167         {"mkfifo", mkfifo_main},
 168 #endif
 169 #ifdef BB_MKNOD                                 //bin
 170         {"mknod", mknod_main},
 171 #endif
 172 #ifdef BB_MKSWAP                                //sbin
 173         {"mkswap", mkswap_main},
 174 #endif
 175 #ifdef BB_MNC                                   //usr/bin
 176         {"mnc", mnc_main},
 177 #endif
 178 #ifdef BB_MORE                                  //bin
 179         {"more", more_main},
 180 #endif
 181 #ifdef BB_MOUNT                                 //bin
 182         {"mount", mount_main},
 183 #endif
 184 #ifdef BB_MT                                    //bin
 185         {"mt", mt_main},
 186 #endif
 187 #ifdef BB_NSLOOKUP                              //usr/bin
 188         {"nslookup", nslookup_main},
 189 #endif
 190 #ifdef BB_PING                                  //bin
 191         {"ping", ping_main},
 192 #endif
 193 #ifdef BB_POWEROFF                              //sbin
 194         {"poweroff", poweroff_main},
 195 #endif
 196 #ifdef BB_PRINTF                                //usr/bin
 197         {"printf", printf_main},
 198 #endif
 199 #ifdef BB_PS                                    //bin
 200         {"ps", ps_main},
 201 #endif
 202 #ifdef BB_PWD                                   //bin
 203         {"pwd", pwd_main},
 204 #endif
 205 #ifdef BB_REBOOT                                //sbin
 206         {"reboot", reboot_main},
 207 #endif
 208 #ifdef BB_RM                                    //bin
 209         {"rm", rm_main},
 210 #endif
 211 #ifdef BB_RMDIR                                 //bin
 212         {"rmdir", rmdir_main},
 213 #endif
 214 #ifdef BB_RMMOD                                 //sbin
 215         {"rmmod", rmmod_main},
 216 #endif
 217 #ifdef BB_SFDISK                                //sbin
 218         {"fdisk", sfdisk_main},
 219         {"sfdisk", sfdisk_main},
 220 #endif
 221 #ifdef BB_SED                                   //bin
 222         {"sed", sed_main},
 223 #endif
 224 #ifdef BB_SLEEP                                 //bin
 225         {"sleep", sleep_main},
 226 #endif
 227 #ifdef BB_SORT                                  //bin
 228         {"sort", sort_main},
 229 #endif
 230 #ifdef BB_SYNC                                  //bin
 231         {"sync", sync_main},
 232 #endif
 233 #ifdef BB_SYSLOGD                               //sbin
 234         {"syslogd", syslogd_main},
 235 #endif
 236 #ifdef BB_LOGGER                                //usr/bin
 237         {"logger", logger_main},
 238 #endif
 239 #ifdef BB_LOGNAME                               //usr/bin
 240         {"logname", logname_main},
 241 #endif
 242 #ifdef BB_SWAPONOFF                             //sbin
 243         {"swapon", swap_on_off_main},
 244         {"swapoff", swap_on_off_main},
 245 #endif
 246 #ifdef BB_TAIL                                  //usr/bin
 247         {"tail", tail_main},
 248 #endif
 249 #ifdef BB_TAR                                   //bin
 250         {"tar", tar_main},
 251 #endif
 252 #ifdef BB_TEE                                   //bin
 253         {"tee", tee_main},
 254 #endif
 255 #ifdef BB_TOUCH                                 //usr/bin
 256         {"touch", touch_main},
 257 #endif
 258 #ifdef BB_TRUE_FALSE                    //bin
 259         {"true", true_main},
 260         {"false", false_main},
 261 #endif
 262 #ifdef BB_TTY                                   //usr/bin
 263         {"tty", tty_main},
 264 #endif
 265 #ifdef BB_UNAME                                 //bin
 266         {"uname", uname_main},
 267 #endif
 268 #ifdef BB_UMOUNT                                //bin
 269         {"umount", umount_main},
 270 #endif
 271 #ifdef BB_UNIQ                                  //bin
 272         {"uniq", uniq_main},
 273 #endif
 274 #ifdef BB_UPDATE                                //sbin
 275         {"update", update_main},
 276 #endif
 277 #ifdef BB_WC                                    //usr/bin
 278         {"wc", wc_main},
 279 #endif
 280 #ifdef BB_WHOAMI                                //usr/bin
 281         {"whoami", whoami_main},
 282 #endif
 283 #ifdef BB_YES                                   //usr/bin
 284         {"yes", yes_main},
 285 #endif
 286 #ifdef BB_GUNZIP                                //bin
 287         {"zcat", gunzip_main},
 288         {"gunzip", gunzip_main},
 289 #endif
 290 #ifdef BB_GZIP                                  //bin
 291         {"gzip", gzip_main},
 292 #endif
 293         {0}
 294 };
 295
 296
 297
 298 int main(int argc, char **argv)
 299 {
 300         char *s = argv[0];
 301         char *name = argv[0];
 302         const struct Applet *a = applets;
 303
 304         while (*s != '\0') {
 305                 if (*s++ == '/')
 306                         name = s;
 307         }
 308
 309         while (a->name != 0) {
 310                 if (strcmp(name, a->name) == 0) {
 311                         int status;
 312
 313                         status = ((*(a->main)) (argc, argv));
 314                         if (status < 0) {
 315                                 fprintf(stderr, "%s: %s\n", a->name, strerror(errno));
 316                         }
 317                         fprintf(stderr, "\n");
 318                         exit(status);
 319                 }
 320                 a++;
 321         }
 322         exit(busybox_main(argc, argv));
 323 }
 324
 325
 326 int busybox_main(int argc, char **argv)
 327 {
 328         int col = 0;
 329
 330         argc--;
 331         argv++;
 332
 333         if (been_there_done_that == 1 || argc < 1) {
 334                 const struct Applet *a = applets;
 335
 336                 fprintf(stderr, "BusyBox v%s (%s) multi-call binary -- GPL2\n\n",
 337                                 BB_VER, BB_BT);
 338                 fprintf(stderr, "Usage: busybox [function] [arguments]...\n");
 339                 fprintf(stderr, "   or: [function] [arguments]...\n\n");
 340                 fprintf(stderr,
 341                                 "\tMost people will create a symlink to busybox for each\n"
 342                                 "\tfunction name, and busybox will act like whatever you invoke it as.\n");
 343                 fprintf(stderr, "\nCurrently defined functions:\n");
 344
 345                 while (a->name != 0) {
 346                         col +=
 347                                 fprintf(stderr, "%s%s", ((col == 0) ? "\t" : ", "),
 348                                                 (a++)->name);
 349                         if (col > 60 && a->name != 0) {
 350                                 fprintf(stderr, ",\n");
 351                                 col = 0;
 352                         }
 353                 }
 354                 fprintf(stderr, "\n\n");
 355                 exit(-1);
 356         } else {
 357                 /* If we've already been here once, exit now */
 358                 been_there_done_that = 1;
 359                 return (main(argc, argv));
 360         }
 361 }