blob: 4781a42763d0483fe64be15fd46afabb9e7649b9
| 1 | /* vi: set sw=4 ts=4: */ |
| 2 | /* This file was released into the public domain by Paul Fox. |
| 3 | */ |
| 4 | //config:config BBCONFIG |
| 5 | //config: bool "bbconfig" |
| 6 | //config: default n |
| 7 | //config: help |
| 8 | //config: The bbconfig applet will print the config file with which |
| 9 | //config: busybox was built. |
| 10 | //config: |
| 11 | //config:config FEATURE_COMPRESS_BBCONFIG |
| 12 | //config: bool "Compress bbconfig data" |
| 13 | //config: default y |
| 14 | //config: depends on BBCONFIG |
| 15 | //config: help |
| 16 | //config: Store bbconfig data in compressed form, uncompress them on-the-fly |
| 17 | //config: before output. |
| 18 | //config: |
| 19 | //config: If you have a really tiny busybox with few applets enabled (and |
| 20 | //config: bunzip2 isn't one of them), the overhead of the decompressor might |
| 21 | //config: be noticeable. Also, if you run executables directly from ROM |
| 22 | //config: and have very little memory, this might not be a win. Otherwise, |
| 23 | //config: you probably want this. |
| 24 | |
| 25 | //applet:IF_BBCONFIG(APPLET(bbconfig, BB_DIR_BIN, BB_SUID_DROP)) |
| 26 | |
| 27 | //kbuild:lib-$(CONFIG_BBCONFIG) += bbconfig.o |
| 28 | |
| 29 | //usage:#define bbconfig_trivial_usage |
| 30 | //usage: "" |
| 31 | //usage:#define bbconfig_full_usage "\n\n" |
| 32 | //usage: "Print the config file used by busybox build" |
| 33 | |
| 34 | #include "libbb.h" |
| 35 | #include "bbconfigopts.h" |
| 36 | #if ENABLE_FEATURE_COMPRESS_BBCONFIG |
| 37 | # include "bb_archive.h" |
| 38 | # include "bbconfigopts_bz2.h" |
| 39 | #endif |
| 40 | |
| 41 | int bbconfig_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| 42 | int bbconfig_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM) |
| 43 | { |
| 44 | #if ENABLE_FEATURE_COMPRESS_BBCONFIG |
| 45 | bunzip_data *bd; |
| 46 | int i = start_bunzip(&bd, |
| 47 | /* src_fd: */ -1, |
| 48 | /* inbuf: */ bbconfig_config_bz2, |
| 49 | /* len: */ sizeof(bbconfig_config_bz2)); |
| 50 | /* read_bunzip can longjmp to start_bunzip, and ultimately |
| 51 | * end up here with i != 0 on read data errors! Not trivial */ |
| 52 | if (!i) { |
| 53 | /* Cannot use xmalloc: will leak bd in NOFORK case! */ |
| 54 | char *outbuf = malloc_or_warn(sizeof(bbconfig_config)); |
| 55 | if (outbuf) { |
| 56 | read_bunzip(bd, outbuf, sizeof(bbconfig_config)); |
| 57 | full_write1_str(outbuf); |
| 58 | } |
| 59 | } |
| 60 | #else |
| 61 | full_write1_str(bbconfig_config); |
| 62 | #endif |
| 63 | return 0; |
| 64 | } |
| 65 |