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archival: add option -k "keep" to gzip/bzip2/lzop, add -U "nokeep" to lzop

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function                                             old     new   delta
bbunpack                                             745     779     +34
lzop_main                                             93     121     +28
do_lzo_compress                                      320     328      +8
packed_usage                                       31685   31653     -32
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(add/remove: 0/0 grow/shrink: 3/1 up/down: 70/-32)             Total: 38 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2017-06-15 18:07:04 +02:00
parent 5d72ae53c9
commit 1c013fae28
4 changed files with 81 additions and 43 deletions
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53
archival/lzop.c
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@@ -33,13 +33,13 @@
//config:
//config:config UNLZOP
//config: bool "unlzop"
//config: default y
//config: default n # INCOMPAT: upstream lzop does not provide such tool
//config: help
//config: Lzop decompresion.
//config:
//config:config LZOPCAT
//config: bool "lzopcat"
//config: default y
//config: default n # INCOMPAT: upstream lzop does not provide such tool
//config: help
//config: Alias to "unlzop -c".
//config:
@@ -61,12 +61,14 @@
//kbuild:lib-$(CONFIG_LZOPCAT) += lzop.o
//usage:#define lzop_trivial_usage
//usage: "[-cfvd123456789CF] [FILE]..."
//usage: "[-cfUvd123456789CF] [FILE]..."
//usage:#define lzop_full_usage "\n\n"
//usage: " -1..9 Compression level"
//usage: "\n -d Decompress"
//usage: "\n -c Write to stdout"
//usage: "\n -f Force"
//usage: "\n -U Delete input files"
///////: "\n -k Keep input files" (default, so why bother documenting?)
//usage: "\n -v Verbose"
//usage: "\n -F Don't store or verify checksum"
//usage: "\n -C Also write checksum of compressed block"
@@ -78,10 +80,12 @@
//usage: "\n -F Don't verify checksum"
//usage:
//usage:#define unlzop_trivial_usage
//usage: "[-cfvF] [FILE]..."
//usage: "[-cfkvF] [FILE]..."
//usage:#define unlzop_full_usage "\n\n"
//usage: " -c Write to stdout"
//usage: "\n -f Force"
//usage: "\n -U Delete input files"
///////: "\n -k Keep input files" (default, so why bother documenting?)
//usage: "\n -v Verbose"
//usage: "\n -F Don't verify checksum"
@@ -472,27 +476,33 @@ struct globals {
//#define LZOP_VERSION_STRING "1.01"
//#define LZOP_VERSION_DATE "Apr 27th 2003"
#define OPTION_STRING "cfvqdt123456789CF"
// lzop wants to be weird:
// unlike all other compressosrs, its -k "keep" option is the default,
// and -U is used to delete the source. We will invert the bit after getopt().
#define OPTION_STRING "cfUvqdt123456789CFk"
/* Note: must be kept in sync with archival/bbunzip.c */
enum {
OPT_STDOUT = (1 << 0),
OPT_FORCE = (1 << 1),
OPT_VERBOSE = (1 << 2),
OPT_QUIET = (1 << 3),
OPT_DECOMPRESS = (1 << 4),
OPT_TEST = (1 << 5),
OPT_1 = (1 << 6),
OPT_2 = (1 << 7),
OPT_3 = (1 << 8),
OPT_4 = (1 << 9),
OPT_5 = (1 << 10),
OPT_6 = (1 << 11),
OPT_789 = (7 << 12),
OPT_KEEP = (1 << 2),
OPT_VERBOSE = (1 << 3),
OPT_QUIET = (1 << 4),
OPT_DECOMPRESS = (1 << 5),
OPT_TEST = (1 << 6),
OPT_1 = (1 << 7),
OPT_2 = (1 << 8),
OPT_3 = (1 << 9),
OPT_4 = (1 << 10),
OPT_5 = (1 << 11),
OPT_6 = (1 << 12),
OPT_7 = (1 << 13),
OPT_8 = (1 << 14),
OPT_C = (1 << 15),
OPT_F = (1 << 16),
OPT_9 = (1 << 15),
OPT_C = (1 << 16),
OPT_F = (1 << 17),
OPT_k = (1 << 18),
OPT_789 = OPT_7 | OPT_8 | OPT_9
};
/**********************************************************************/
@@ -1125,6 +1135,13 @@ int lzop_main(int argc UNUSED_PARAM, char **argv)
{
getopt32(argv, OPTION_STRING);
argv += optind;
/* -U is "anti -k", invert bit for bbunpack(): */
option_mask32 ^= OPT_KEEP;
/* -k disables -U (if any): */
/* opt_complementary = "k-U"; - nope, only handles -Uk, not -kU */
if (option_mask32 & OPT_k)
option_mask32 |= OPT_KEEP;
/* lzopcat? */
if (ENABLE_LZOPCAT && applet_name[4] == 'c')
option_mask32 |= (OPT_STDOUT | OPT_DECOMPRESS);