busybox.c

   1 #include "internal.h"
   2 #include <stdio.h>
   3 #include <string.h>
   4 #include <errno.h>
   5
   6 #ifndef BB_INIT
   7 #undef BB_FEATURE_LINUXRC
   8 #endif
   9
  10 static int been_there_done_that = 0;
  11
  12 /* It has been alledged that doing such things can
  13  * help reduce binary size when staticly linking,
  14  * of course with glibc, this is unlikely as long
  15  * as we use things like printf -- perhaps a printf
  16  * replacement may be in order
  17  */
  18 #if 0
  19 void exit (int status) __attribute__ ((noreturn));
  20 void exit (int status) { _exit(status); };
  21 void abort (void) __attribute__ ((__noreturn__));
  22 void abort (void) { _exit(0); };
  23 int atexit (void (*__func) (void)) { _exit(0); };
  24 void *__libc_stack_end;
  25 #endif
  26
  27
  28 static const struct Applet applets[] = {
  29
  30 #ifdef BB_BUSYBOX               //bin
  31     {"busybox", busybox_main},
  32 #endif
  33 #ifdef BB_BLOCK_DEVICE          //sbin
  34     {"block_device", block_device_main},
  35 #endif
  36 #ifdef BB_CAT                   //bin
  37     {"cat", cat_main},
  38 #endif
  39 #ifdef BB_CHMOD_CHOWN_CHGRP     //bin
  40     {"chmod", chmod_chown_chgrp_main},
  41     {"chown", chmod_chown_chgrp_main},
  42     {"chgrp", chmod_chown_chgrp_main},
  43 #endif
  44 #ifdef BB_CHROOT                //sbin
  45     {"chroot", chroot_main},
  46 #endif
  47 #ifdef BB_CLEAR                 //usr/bin
  48     {"clear", clear_main},
  49 #endif
  50 #ifdef BB_CHVT                  //usr/bin
  51     {"chvt", chvt_main},
  52 #endif
  53 #ifdef BB_CP                    //bin
  54     {"cp", cp_main},
  55 #endif
  56 #ifdef BB_DATE                  //bin
  57     {"date", date_main},
  58 #endif
  59 #ifdef BB_DD                    //bin
  60     {"dd", dd_main},
  61 #endif
  62 #ifdef BB_DF                    //bin
  63     {"df", df_main},
  64 #endif
  65 #ifdef BB_DMESG                 //bin
  66     {"dmesg", dmesg_main},
  67 #endif
  68 #ifdef BB_DU                    //bin
  69     {"du", du_main},
  70 #endif
  71 #ifdef BB_DUTMP                 //usr/sbin
  72     {"dutmp", dutmp_main},
  73 #endif
  74 #ifdef BB_FBSET                 //usr/sbin
  75     {"fbset", fbset_main},
  76 #endif
  77 #ifdef BB_FDFLUSH               //bin
  78     {"fdflush", fdflush_main},
  79 #endif
  80 #ifdef BB_FIND                  //usr/bin
  81     {"find", find_main},
  82 #endif
  83 #ifdef BB_FREE                  //usr/bin
  84     {"free", free_main},
  85 #endif
  86 #ifdef BB_DEALLOCVT                     //usr/bin
  87     {"deallocvt", deallocvt_main},
  88 #endif
  89 #ifdef BB_FSCK_MINIX            //sbin
  90     {"fsck.minix", fsck_minix_main},
  91 #endif
  92 #ifdef BB_MKFS_MINIX            //sbin
  93     {"mkfs.minix", mkfs_minix_main},
  94 #endif
  95 #ifdef BB_GREP                  //bin
  96     {"grep", grep_main},
  97 #endif
  98 #ifdef BB_HALT                  //sbin
  99     {"halt", halt_main},
 100 #endif
 101 #ifdef BB_HEAD                  //bin
 102     {"head", head_main},
 103 #endif
 104 #ifdef BB_HOSTID                //usr/bin
 105     {"hostid", hostid_main},
 106 #endif
 107 #ifdef BB_HOSTNAME              //bin
 108     {"hostname", hostname_main},
 109 #endif
 110 #ifdef BB_INIT                  //sbin
 111     {"init", init_main},
 112 #endif
 113 #ifdef BB_INSMOD                //sbin
 114     {"insmod", insmod_main},
 115 #endif
 116 #ifdef BB_FEATURE_LINUXRC       //
 117     {"linuxrc", init_main},
 118 #endif
 119 #ifdef BB_KILL                  //bin
 120     {"kill", kill_main},
 121 #endif
 122 #ifdef BB_LENGTH                //usr/bin
 123     {"length", length_main},
 124 #endif
 125 #ifdef BB_LN                    //bin
 126     {"ln", ln_main},
 127 #endif
 128 #ifdef BB_LOADACM               //usr/bin
 129     {"loadacm", loadacm_main},
 130 #endif
 131 #ifdef BB_LOADFONT              //usr/bin
 132     {"loadfont", loadfont_main},
 133 #endif
 134 #ifdef BB_LOADKMAP              //sbin
 135     {"loadkmap", loadkmap_main},
 136 #endif
 137 #ifdef BB_LS                    //bin
 138     {"ls", ls_main},
 139 #endif
 140 #ifdef BB_LSMOD                 //sbin
 141     {"lsmod", lsmod_main},
 142 #endif
 143 #ifdef BB_MAKEDEVS              //sbin
 144     {"makedevs", makedevs_main},
 145 #endif
 146 #ifdef BB_MATH                  //usr/bin
 147     {"math", math_main},
 148 #endif
 149 #ifdef BB_MKDIR                 //bin
 150     {"mkdir", mkdir_main},
 151 #endif
 152 #ifdef BB_MKFIFO                //usr/bin
 153     {"mkfifo", mkfifo_main},
 154 #endif
 155 #ifdef BB_MKNOD                 //bin
 156     {"mknod", mknod_main},
 157 #endif
 158 #ifdef BB_MKSWAP                //sbin
 159     {"mkswap", mkswap_main},
 160 #endif
 161 #ifdef BB_MNC                   //usr/bin
 162     {"mnc", mnc_main},
 163 #endif
 164 #ifdef BB_MORE                  //bin
 165     {"more", more_main},
 166 #endif
 167 #ifdef BB_MOUNT                 //bin
 168     {"mount", mount_main},
 169 #endif
 170 #ifdef BB_MT                    //bin
 171     {"mt", mt_main},
 172 #endif
 173 #ifdef BB_MV                    //bin
 174     {"mv", mv_main},
 175 #endif
 176 #ifdef BB_PING                  //bin
 177     {"ping", ping_main},
 178 #endif
 179 #ifdef BB_POWEROFF              //sbin
 180     {"poweroff", poweroff_main},
 181 #endif
 182 #ifdef BB_PRINTF                //usr/bin
 183     {"printf", printf_main},
 184 #endif
 185 #ifdef BB_PS                    //bin
 186     {"ps", ps_main},
 187 #endif
 188 #ifdef BB_PWD                   //bin
 189     {"pwd", pwd_main},
 190 #endif
 191 #ifdef BB_REBOOT                //sbin
 192     {"reboot", reboot_main},
 193 #endif
 194 #ifdef BB_RM                    //bin
 195     {"rm", rm_main},
 196 #endif
 197 #ifdef BB_RMDIR                 //bin
 198     {"rmdir", rmdir_main},
 199 #endif
 200 #ifdef BB_RMMOD                 //sbin
 201     {"rmmod", rmmod_main},
 202 #endif
 203 #ifdef BB_SFDISK                //sbin
 204     {"fdisk", sfdisk_main},
 205     {"sfdisk", sfdisk_main},
 206 #endif
 207 #ifdef BB_SED                   //bin
 208     {"sed", sed_main},
 209 #endif
 210 #ifdef BB_SLEEP                 //bin
 211     {"sleep", sleep_main},
 212 #endif
 213 #ifdef BB_SORT                  //bin
 214     {"sort", sort_main},
 215 #endif
 216 #ifdef BB_SYNC                  //bin
 217     {"sync", sync_main},
 218 #endif
 219 #ifdef BB_SYSLOGD               //sbin
 220     {"syslogd", syslogd_main},
 221 #endif
 222 #ifdef BB_LOGGER                //usr/bin
 223     {"logger", logger_main},
 224 #endif
 225 #ifdef BB_LOGNAME               //usr/bin
 226     {"logname", logname_main},
 227 #endif
 228 #ifdef BB_SWAPONOFF             //sbin
 229     {"swapon", swap_on_off_main},
 230     {"swapoff", swap_on_off_main},
 231 #endif
 232 #ifdef BB_TAIL                  //usr/bin
 233     {"tail", tail_main},
 234 #endif
 235 #ifdef BB_TAR                   //bin
 236     {"tar", tar_main},
 237 #endif
 238 #ifdef BB_TEE                   //bin
 239     {"tee", tee_main},
 240 #endif
 241 #ifdef BB_TOUCH                 //usr/bin
 242     {"touch", touch_main},
 243 #endif
 244 #ifdef BB_TRUE_FALSE            //bin
 245     {"true", true_main},
 246     {"false", false_main},
 247 #endif
 248 #ifdef BB_TTY                   //usr/bin
 249     {"tty", tty_main},
 250 #endif
 251 #ifdef BB_UNAME                 //bin
 252     {"uname",  uname_main},
 253 #endif
 254 #ifdef BB_UMOUNT                //bin
 255     {"umount",  umount_main},
 256 #endif
 257 #ifdef BB_UNIQ                  //bin
 258     {"uniq", uniq_main},
 259 #endif
 260 #ifdef BB_UPDATE                //sbin
 261     {"update", update_main},
 262 #endif
 263 #ifdef BB_WC                    //usr/bin
 264     {"wc",  wc_main},
 265 #endif
 266 #ifdef BB_WHOAMI                //usr/bin
 267     {"whoami",  whoami_main},
 268 #endif
 269 #ifdef BB_YES                   //usr/bin
 270     {"yes",  yes_main},
 271 #endif
 272 #ifdef BB_GUNZIP                //bin
 273     {"zcat", gunzip_main},
 274     {"gunzip", gunzip_main},
 275 #endif
 276 #ifdef BB_GZIP                  //bin
 277     {"gzip", gzip_main},
 278 #endif
 279     {0}
 280 };
 281
 282
 283
 284 int main(int argc, char **argv)
 285 {
 286     char *s = argv[0];
 287     char *name = argv[0];
 288     const struct Applet *a = applets;
 289
 290     while (*s != '\0') {
 291         if (*s++ == '/')
 292             name = s;
 293     }
 294
 295     while (a->name != 0) {
 296         if (strcmp(name, a->name) == 0) {
 297             int status;
 298
 299             status = ((*(a->main)) (argc, argv));
 300             if (status < 0) {
 301                 fprintf(stderr, "%s: %s\n", a->name, strerror(errno));
 302             }
 303             fprintf(stderr, "\n");
 304             exit(status);
 305         }
 306         a++;
 307     }
 308     exit (busybox_main(argc, argv));
 309 }
 310
 311
 312 int busybox_main(int argc, char **argv)
 313 {
 314     int col=0;
 315     argc--;
 316     argv++;
 317
 318     if (been_there_done_that == 1 || argc < 1) {
 319         const struct Applet *a = applets;
 320         fprintf(stderr, "BusyBox v%s (%s) multi-call binary -- GPL2\n\n",
 321                 BB_VER, BB_BT);
 322         fprintf(stderr, "Usage: busybox [function] [arguments]...\n");
 323         fprintf(stderr, "   or: [function] [arguments]...\n\n");
 324         fprintf(stderr,
 325                 "\tMost people will create a symlink to busybox for each\n"
 326                 "\tfunction name, and busybox will act like whatever you invoke it as.\n");
 327         fprintf(stderr, "\nCurrently defined functions:\n");
 328
 329         while (a->name != 0) {
 330             col+=fprintf(stderr, "%s%s", ((col==0)? "\t":", "), (a++)->name);
 331             if (col>60) {
 332                 fprintf(stderr, ",\n");
 333                 col=0;
 334             }
 335         }
 336         fprintf(stderr, "\n\n");
 337         exit(-1);
 338     } else {
 339         /* If we've already been here once, exit now */
 340         been_there_done_that = 1;
 341         return (main(argc, argv));
 342     }
 343 }