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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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11
archival/gzip.c
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@@ -84,7 +84,7 @@ aa: 85.1% -- replaced with aa.gz
//kbuild:lib-$(CONFIG_GZIP) += gzip.o
//usage:#define gzip_trivial_usage
//usage: "[-cf" IF_FEATURE_GZIP_DECOMPRESS("dt") IF_FEATURE_GZIP_LEVELS("123456789") "] [FILE]..."
//usage: "[-cfk" IF_FEATURE_GZIP_DECOMPRESS("dt") IF_FEATURE_GZIP_LEVELS("123456789") "] [FILE]..."
//usage:#define gzip_full_usage "\n\n"
//usage: "Compress FILEs (or stdin)\n"
//usage: IF_FEATURE_GZIP_LEVELS(
@@ -96,6 +96,7 @@ aa: 85.1% -- replaced with aa.gz
//usage: )
//usage: "\n -c Write to stdout"
//usage: "\n -f Force"
//usage: "\n -k Keep input files"
//usage:
//usage:#define gzip_example_usage
//usage: "$ ls -la /tmp/busybox*\n"
@@ -2219,13 +2220,13 @@ int gzip_main(int argc UNUSED_PARAM, char **argv)
applet_long_options = gzip_longopts;
#endif
/* Must match bbunzip's constants OPT_STDOUT, OPT_FORCE! */
opt = getopt32(argv, "cfv" IF_FEATURE_GZIP_DECOMPRESS("dt") "qn123456789");
opt = getopt32(argv, "cfkv" IF_FEATURE_GZIP_DECOMPRESS("dt") "qn123456789");
#if ENABLE_FEATURE_GZIP_DECOMPRESS /* gunzip_main may not be visible... */
if (opt & 0x18) // -d and/or -t
if (opt & 0x30) // -d and/or -t
return gunzip_main(argc, argv);
#endif
#if ENABLE_FEATURE_GZIP_LEVELS
opt >>= ENABLE_FEATURE_GZIP_DECOMPRESS ? 7 : 5; /* drop cfv[dt]qn bits */
opt >>= ENABLE_FEATURE_GZIP_DECOMPRESS ? 8 : 6; /* drop cfkv[dt]qn bits */
if (opt == 0)
opt = 1 << 6; /* default: 6 */
opt = ffs(opt >> 4); /* Maps -1..-4 to [0], -5 to [1] ... -9 to [5] */
@@ -2234,7 +2235,7 @@ int gzip_main(int argc UNUSED_PARAM, char **argv)
max_lazy_match = gzip_level_config[opt].lazy2 * 2;
nice_match = gzip_level_config[opt].nice2 * 2;
#endif
option_mask32 &= 0x7; /* retain only -cfv */
option_mask32 &= 0xf; /* retain only -cfkv */
/* Allocate all global buffers (for DYN_ALLOC option) */
ALLOC(uch, G1.l_buf, INBUFSIZ);