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 static const struct Applet applets[] = {
   9
  10 #ifdef BB_BUSYBOX               //bin
  11     {"busybox", busybox_main},
  12 #endif
  13 #ifdef BB_BLOCK_DEVICE          //sbin
  14     {"block_device", block_device_main},
  15 #endif
  16 #ifdef BB_CAT                   //bin
  17     {"cat", cat_more_main},
  18 #endif
  19 #ifdef BB_CHMOD                 //bin
  20     {"chmod", chmod_main},
  21 #endif
  22 #ifdef BB_CHOWN                 //bin
  23     {"chown", chown_main},
  24     {"chgrp", chown_main},
  25 #endif
  26 #ifdef BB_CHROOT                //sbin
  27     {"chroot", chroot_main},
  28 #endif
  29 #ifdef BB_CLEAR                 //usr/bin
  30     {"clear", clear_main},
  31 #endif
  32 #ifdef BB_CP                    //bin
  33     {"cp", dyadic_main},
  34 #endif
  35 #ifdef BB_DATE                  //bin
  36     {"date", date_main},
  37 #endif
  38 #ifdef BB_DD                    //bin
  39     {"dd", dd_main},
  40 #endif
  41 #ifdef BB_DF                    //bin
  42     {"df", df_main},
  43 #endif
  44 #ifdef BB_DMESG                 //bin
  45     {"dmesg", dmesg_main},
  46 #endif
  47 #ifdef BB_DUTMP                 //usr/sbin
  48     {"dutmp", cat_more_main},
  49 #endif
  50 #ifdef BB_FALSE                 //bin
  51     {"false", false_main},
  52 #endif
  53 #ifdef BB_FDFLUSH               //bin
  54     {"fdflush", monadic_main},
  55 #endif
  56 #ifdef BB_FIND                  //usr/bin
  57     {"find", find_main},
  58 #endif
  59 #ifdef BB_GREP                  //bin
  60     {"grep", grep_main},
  61 #endif
  62 #ifdef BB_HALT                  //sbin
  63     {"halt", halt_main},
  64 #endif
  65 #ifdef BB_INIT                  //sbin
  66     {"init", init_main},
  67 #endif
  68 #ifdef BB_KILL                  //bin
  69     {"kill", kill_main},
  70 #endif
  71 #ifdef BB_LENGTH                //usr/bin
  72     {"length", length_main},
  73 #endif
  74 #ifdef BB_LN                    //bin
  75     {"ln", dyadic_main},
  76 #endif
  77 #ifdef BB_LOADKMAP              //sbin
  78     {"loadkmap", loadkmap_main},
  79 #endif
  80 #ifdef BB_LOSETUP               //sbin
  81     {"losetup", losetup_main},
  82 #endif
  83 #ifdef BB_LS                    //bin
  84     {"ls", ls_main},
  85 #endif
  86 #ifdef BB_MAKEDEVS              //sbin
  87     {"makedevs", makedevs_main},
  88 #endif
  89 #ifdef BB_MATH                  //usr/bin
  90     {"math", math_main},
  91 #endif
  92 #ifdef BB_MKDIR                 //bin
  93     {"mkdir", monadic_main},
  94 #endif
  95 #ifdef BB_MKNOD                 //bin
  96     {"mknod", mknod_main},
  97 #endif
  98 #ifdef BB_MKSWAP                //sbin
  99     {"mkswap", mkswap_main},
 100 #endif
 101 #ifdef BB_MNC                   //usr/bin
 102     {"mnc", mnc_main},
 103 #endif
 104 #ifdef BB_MORE                  //bin
 105     {"more", more_main},
 106 #endif
 107 #ifdef BB_MOUNT                 //bin
 108     {"mount", mount_main},
 109 #endif
 110 #ifdef BB_MT                    //bin
 111     {"mt", mt_main},
 112 #endif
 113 #ifdef BB_MV                    //bin
 114     {"mv", dyadic_main},
 115 #endif
 116 #ifdef BB_PRINTF                //usr/bin
 117     {"printf", printf_main},
 118 #endif
 119 #ifdef BB_PWD                   //bin
 120     {"pwd", pwd_main},
 121 #endif
 122 #ifdef BB_REBOOT                //sbin
 123     {"reboot", reboot_main},
 124 #endif
 125 #ifdef BB_RM                    //bin
 126     {"rm", rm_main},
 127 #endif
 128 #ifdef BB_RMDIR                 //bin
 129     {"rmdir", monadic_main},
 130 #endif
 131 #ifdef BB_SLEEP                 //bin
 132     {"sleep", sleep_main},
 133 #endif
 134 #ifdef BB_TAR                   //bin
 135     {"tar", tar_main},
 136 #endif
 137 #ifdef BB_SWAPOFF               //sbin
 138     {"swapoff", monadic_main},
 139 #endif
 140 #ifdef BB_SWAPON                //sbin
 141     {"swapon", monadic_main},
 142 #endif
 143 #ifdef BB_SYNC                  //bin
 144     {"sync", sync_main},
 145 #endif
 146 #ifdef BB_TOUCH                 //usr/bin
 147     {"touch", monadic_main},
 148 #endif
 149 #ifdef BB_TRUE                  //bin
 150     {"true", true_main},
 151 #endif
 152 #ifdef BB_UMOUNT                //bin
 153     {"umount", umount_main},
 154 #endif
 155 #ifdef BB_UPDATE                //sbin
 156     {"update", update_main},
 157 #endif
 158 #ifdef BB_ZCAT                  //bin
 159     {"zcat", zcat_main},
 160     {"gunzip", zcat_main},
 161 #endif
 162 #ifdef BB_GZIP                  //bin
 163     {"gzip", gzip_main},
 164 #endif
 165     {0}
 166 };
 167
 168 int main(int argc, char **argv)
 169 {
 170     char *s = argv[0];
 171     char *name = argv[0];
 172     const struct Applet *a = applets;
 173
 174     while (*s != '\0') {
 175         if (*s++ == '/')
 176             name = s;
 177     }
 178
 179     while (a->name != 0) {
 180         if (strcmp(name, a->name) == 0) {
 181             int status;
 182
 183             status = ((*(a->main)) (argc, argv));
 184             if (status < 0) {
 185                 fprintf(stderr, "%s: %s\n", a->name, strerror(errno));
 186             }
 187             fprintf(stderr, "\n");
 188             exit(status);
 189         }
 190         a++;
 191     }
 192     return (busybox_main(argc, argv));
 193 }
 194
 195
 196 int busybox_main(int argc, char **argv)
 197 {
 198     argc--;
 199     argv++;
 200
 201     /* If we've already been here once, exit now */
 202     if (been_there_done_that == 1)
 203         return -1;
 204     been_there_done_that = 1;
 205
 206     if (argc < 1) {
 207         const struct Applet *a = applets;
 208         fprintf(stderr, "BusyBox v%s (%s) multi-call binary -- GPL2\n",
 209                 BB_VER, BB_BT);
 210         fprintf(stderr, "Usage: busybox [function] [arguments]...\n");
 211         fprintf(stderr,
 212                 "\n\tMost people will create a symlink to busybox for each\n"
 213                 "\tfunction name, and busybox will act like whatever you invoke it as.\n");
 214         fprintf(stderr, "\nCurrently defined functions:\n");
 215
 216         if (a->name != 0) {
 217             fprintf(stderr, "%s", a->name);
 218             a++;
 219         }
 220         while (a->name != 0) {
 221             fprintf(stderr, ", %s", a->name);
 222             a++;
 223         }
 224         fprintf(stderr, "\n\n");
 225         exit(-1);
 226     } else
 227         return (main(argc, argv));
 228 }