release/src/router/busybox/miscutils/bbconfig.c

   1 /* vi: set sw=4 ts=4: */
   2 /* This file was released into the public domain by Paul Fox.
   3  */
   4
   5 //usage:#define bbconfig_trivial_usage
   6 //usage:       ""
   7 //usage:#define bbconfig_full_usage "\n\n"
   8 //usage:       "Print the config file used by busybox build"
   9
  10 #include "libbb.h"
  11 #include "bbconfigopts.h"
  12 #if ENABLE_FEATURE_COMPRESS_BBCONFIG
  13 # include "bb_archive.h"
  14 # include "bbconfigopts_bz2.h"
  15 #endif
  16
  17 int bbconfig_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  18 int bbconfig_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
  19 {
  20 #if ENABLE_FEATURE_COMPRESS_BBCONFIG
  21         bunzip_data *bd;
  22         int i = start_bunzip(&bd,
  23                         /* src_fd: */ -1,
  24                         /* inbuf:  */ bbconfig_config_bz2,
  25                         /* len:    */ sizeof(bbconfig_config_bz2));
  26         /* read_bunzip can longjmp to start_bunzip, and ultimately
  27          * end up here with i != 0 on read data errors! Not trivial */
  28         if (!i) {
  29                 /* Cannot use xmalloc: will leak bd in NOFORK case! */
  30                 char *outbuf = malloc_or_warn(sizeof(bbconfig_config));
  31                 if (outbuf) {
  32                         read_bunzip(bd, outbuf, sizeof(bbconfig_config));
  33                         full_write1_str(outbuf);
  34                 }
  35         }
  36 #else
  37         full_write1_str(bbconfig_config);
  38 #endif
  39         return 0;
  40 }