busybox.c

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