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Allow 'gzip -d' and 'bzip2 -d' without gunzip or bunzip2

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Idea copied from the "ip" applet.

Signed-off-by: Kang-Che Sung <explorer09@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Kang-Che Sung
2017-01-08 14:28:34 +08:00
committed by Denys Vlasenko
parent fb87d93d1e
commit b130f9f758
3 changed files with 41 additions and 19 deletions
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20
archival/bbunzip.c
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@@ -12,9 +12,9 @@
//kbuild:lib-$(CONFIG_LZOPCAT) += bbunzip.o
//kbuild:lib-$(CONFIG_UNLZOP) += bbunzip.o
/* bzip2_main() too: */
//kbuild:lib-$(CONFIG_BZIP2) += bbunzip.o
//kbuild:lib-$(CONFIG_FEATURE_BZIP2_DECOMPRESS) += bbunzip.o
/* gzip_main() too: */
//kbuild:lib-$(CONFIG_GZIP) += bbunzip.o
//kbuild:lib-$(CONFIG_FEATURE_GZIP_DECOMPRESS) += bbunzip.o
/* Note: must be kept in sync with archival/lzop.c */
enum {
@@ -197,7 +197,7 @@ int FAST_FUNC bbunpack(char **argv,
}
#if ENABLE_UNCOMPRESS \
|| ENABLE_BUNZIP2 || ENABLE_BZCAT \
|| ENABLE_FEATURE_BZIP2_DECOMPRESS \
|| ENABLE_UNLZMA || ENABLE_LZCAT || ENABLE_LZMA \
|| ENABLE_UNXZ || ENABLE_XZCAT || ENABLE_XZ
static
@@ -295,6 +295,7 @@ int uncompress_main(int argc UNUSED_PARAM, char **argv)
//config:config GUNZIP
//config: bool "gunzip"
//config: default y
//config: select FEATURE_GZIP_DECOMPRESS
//config: help
//config: gunzip is used to decompress archives created by gzip.
//config: You can use the `-t' option to test the integrity of
@@ -303,6 +304,7 @@ int uncompress_main(int argc UNUSED_PARAM, char **argv)
//config:config ZCAT
//config: bool "zcat"
//config: default y
//config: select FEATURE_GZIP_DECOMPRESS
//config: help
//config: Alias to "gunzip -c".
//config:
@@ -315,9 +317,7 @@ int uncompress_main(int argc UNUSED_PARAM, char **argv)
//applet:IF_GUNZIP(APPLET(gunzip, BB_DIR_BIN, BB_SUID_DROP))
//applet:IF_ZCAT(APPLET_ODDNAME(zcat, gunzip, BB_DIR_BIN, BB_SUID_DROP, zcat))
//kbuild:lib-$(CONFIG_GUNZIP) += bbunzip.o
//kbuild:lib-$(CONFIG_ZCAT) += bbunzip.o
#if ENABLE_GUNZIP || ENABLE_ZCAT
#if ENABLE_FEATURE_GZIP_DECOMPRESS
static
char* FAST_FUNC make_new_name_gunzip(char *filename, const char *expected_ext UNUSED_PARAM)
{
@@ -385,7 +385,7 @@ int gunzip_main(int argc UNUSED_PARAM, char **argv)
return bbunpack(argv, unpack_gz_stream, make_new_name_gunzip, /*unused:*/ NULL);
}
#endif
#endif /* FEATURE_GZIP_DECOMPRESS */
/*
@@ -408,6 +408,7 @@ int gunzip_main(int argc UNUSED_PARAM, char **argv)
//config:config BUNZIP2
//config: bool "bunzip2"
//config: default y
//config: select FEATURE_BZIP2_DECOMPRESS
//config: help
//config: bunzip2 is a compression utility using the Burrows-Wheeler block
//config: sorting text compression algorithm, and Huffman coding. Compression
@@ -421,14 +422,13 @@ int gunzip_main(int argc UNUSED_PARAM, char **argv)
//config:config BZCAT
//config: bool "bzcat"
//config: default y
//config: select FEATURE_BZIP2_DECOMPRESS
//config: help
//config: Alias to "bunzip2 -c".
//applet:IF_BUNZIP2(APPLET(bunzip2, BB_DIR_USR_BIN, BB_SUID_DROP))
//applet:IF_BZCAT(APPLET_ODDNAME(bzcat, bunzip2, BB_DIR_USR_BIN, BB_SUID_DROP, bzcat))
//kbuild:lib-$(CONFIG_BUNZIP2) += bbunzip.o
//kbuild:lib-$(CONFIG_BZCAT) += bbunzip.o
#if ENABLE_BUNZIP2 || ENABLE_BZCAT
#if ENABLE_FEATURE_BZIP2_DECOMPRESS
int bunzip2_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int bunzip2_main(int argc UNUSED_PARAM, char **argv)
{