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_CHGRP                 //bin
  20     {"chgrp", chgrp_main},
  21 #endif
  22 #ifdef BB_CHMOD                 //bin
  23     {"chmod", chmod_main},
  24 #endif
  25 #ifdef BB_CHOWN                 //bin
  26     {"chown", chown_main},
  27 #endif
  28 #ifdef BB_CHROOT                //sbin
  29     {"chroot", chroot_main},
  30 #endif
  31 #ifdef BB_CLEAR                 //usr/bin
  32     {"clear", clear_main},
  33 #endif
  34 #ifdef BB_CP                    //bin
  35     {"cp", dyadic_main},
  36 #endif
  37 #ifdef BB_DATE                  //bin
  38     {"date", date_main},
  39 #endif
  40 #ifdef BB_DD                    //bin
  41     {"dd", dd_main},
  42 #endif
  43 #ifdef BB_DF                    //bin
  44     {"df", df_main},
  45 #endif
  46 #ifdef BB_DMESG                 //bin
  47     {"dmesg", dmesg_main},
  48 #endif
  49 #ifdef BB_DUTMP                 //usr/sbin
  50     {"dutmp", cat_more_main},
  51 #endif
  52 #ifdef BB_FALSE                 //bin
  53     {"false", false_main},
  54 #endif
  55 #ifdef BB_FDFLUSH               //bin
  56     {"fdflush", monadic_main},
  57 #endif
  58 #ifdef BB_FIND                  //usr/bin
  59     {"find", find_main},
  60 #endif
  61 #ifdef BB_GREP                  //bin
  62     {"grep", grep_main},
  63 #endif
  64 #ifdef BB_HALT                  //sbin
  65     {"halt", halt_main},
  66 #endif
  67 #ifdef BB_INIT                  //sbin
  68     {"init", init_main},
  69 #endif
  70 #ifdef BB_KILL                  //bin
  71     {"kill", kill_main},
  72 #endif
  73 #ifdef BB_LENGTH                //usr/bin
  74     {"length", length_main},
  75 #endif
  76 #ifdef BB_LN                    //bin
  77     {"ln", dyadic_main},
  78 #endif
  79 #ifdef BB_LOADKMAP              //sbin
  80     {"loadkmap", loadkmap_main},
  81 #endif
  82 #ifdef BB_LOSETUP               //sbin
  83     {"losetup", losetup_main},
  84 #endif
  85 #ifdef BB_LS                    //bin
  86     {"ls", ls_main},
  87 #endif
  88 #ifdef BB_MAKEDEVS              //sbin
  89     {"makedevs", makedevs_main},
  90 #endif
  91 #ifdef BB_MATH                  //usr/bin
  92     {"math", math_main},
  93 #endif
  94 #ifdef BB_MKDIR                 //bin
  95     {"mkdir", monadic_main},
  96 #endif
  97 #ifdef BB_MKNOD                 //bin
  98     {"mknod", mknod_main},
  99 #endif
 100 #ifdef BB_MKSWAP                //sbin
 101     {"mkswap", mkswap_main},
 102 #endif
 103 #ifdef BB_MNC                   //usr/bin
 104     {"mnc", mnc_main},
 105 #endif
 106 #ifdef BB_MORE                  //bin
 107     {"more", cat_more_main},
 108 #endif
 109 #ifdef BB_MOUNT                 //bin
 110     {"mount", mount_main},
 111 #endif
 112 #ifdef BB_MT                    //bin
 113     {"mt", mt_main},
 114 #endif
 115 #ifdef BB_MV                    //bin
 116     {"mv", dyadic_main},
 117 #endif
 118 #ifdef BB_PRINTF                //usr/bin
 119     {"printf", printf_main},
 120 #endif
 121 #ifdef BB_PWD                   //bin
 122     {"pwd", pwd_main},
 123 #endif
 124 #ifdef BB_REBOOT                //sbin
 125     {"reboot", reboot_main},
 126 #endif
 127 #ifdef BB_RM                    //bin
 128     {"rm", rm_main},
 129 #endif
 130 #ifdef BB_RMDIR                 //bin
 131     {"rmdir", monadic_main},
 132 #endif
 133 #ifdef BB_SLEEP                 //bin
 134     {"sleep", sleep_main},
 135 #endif
 136 #ifdef BB_TAR                   //bin
 137     {"tar", tar_main},
 138 #endif
 139 #ifdef BB_SWAPOFF               //sbin
 140     {"swapoff", monadic_main},
 141 #endif
 142 #ifdef BB_SWAPON                //sbin
 143     {"swapon", monadic_main},
 144 #endif
 145 #ifdef BB_SYNC                  //bin
 146     {"sync", sync_main},
 147 #endif
 148 #ifdef BB_TOUCH                 //usr/bin
 149     {"touch", monadic_main},
 150 #endif
 151 #ifdef BB_TRUE                  //bin
 152     {"true", true_main},
 153 #endif
 154 #ifdef BB_UMOUNT                //bin
 155     {"umount", umount_main},
 156 #endif
 157 #ifdef BB_UPDATE                //sbin
 158     {"update", update_main},
 159 #endif
 160 #ifdef BB_ZCAT                  //bin
 161     {"zcat", zcat_main},
 162     {"gunzip", zcat_main},
 163 #endif
 164 #ifdef BB_GZIP                  //bin
 165     {"gzip", gzip_main},
 166 #endif
 167     {0}
 168 };
 169
 170 int main(int argc, char **argv)
 171 {
 172     char *s = argv[0];
 173     char *name = argv[0];
 174     const struct Applet *a = applets;
 175
 176     while (*s != '\0') {
 177         if (*s++ == '/')
 178             name = s;
 179     }
 180
 181     while (a->name != 0) {
 182         if (strcmp(name, a->name) == 0) {
 183             int status;
 184
 185             status = ((*(a->main)) (argc, argv));
 186             if (status < 0) {
 187                 fprintf(stderr, "%s: %s\n", a->name, strerror(errno));
 188             }
 189             fprintf(stderr, "\n");
 190             exit(status);
 191         }
 192         a++;
 193     }
 194     return (busybox_main(argc, argv));
 195 }
 196
 197
 198 int busybox_main(int argc, char **argv)
 199 {
 200     argc--;
 201     argv++;
 202
 203     /* If we've already been here once, exit now */
 204     if (been_there_done_that == 1)
 205         return -1;
 206     been_there_done_that = 1;
 207
 208     if (argc < 1) {
 209         const struct Applet *a = applets;
 210         fprintf(stderr, "BusyBox v%s (%s) multi-call binary -- GPL2\n",
 211                 BB_VER, BB_BT);
 212         fprintf(stderr, "Usage: busybox [function] [arguments]...\n");
 213         fprintf(stderr,
 214                 "\n\tMost people will create a symlink to busybox for each\n"
 215                 "\tfunction name, and busybox will act like whatever you invoke it as.\n");
 216         fprintf(stderr, "\nCurrently defined functions:\n");
 217
 218         if (a->name != 0) {
 219             fprintf(stderr, "%s", a->name);
 220             a++;
 221         }
 222         while (a->name != 0) {
 223             fprintf(stderr, ", %s", a->name);
 224             a++;
 225         }
 226         fprintf(stderr, "\n\n");
 227         exit(-1);
 228     } else
 229         return (main(argc, argv));
 230 }