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cp: implement -n

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function                                             old     new   delta
.rodata                                           103681  103722     +41
packed_usage                                       33698   33717     +19
copy_file                                           1678    1696     +18
cp_main                                              500     492      -8
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(add/remove: 0/0 grow/shrink: 3/1 up/down: 78/-8)              Total: 70 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2021-06-22 15:28:34 +02:00
parent 91b9549a8c
commit 56bbbfae7d
3 changed files with 28 additions and 22 deletions
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29
include/libbb.h
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@ -450,28 +450,29 @@ enum { /* cp.c, mv.c, install.c depend on these values. CAREFUL when changing th
FILEUTILS_RECUR = 1 << 2, /* -R */
FILEUTILS_FORCE = 1 << 3, /* -f */
FILEUTILS_INTERACTIVE = 1 << 4, /* -i */
FILEUTILS_MAKE_HARDLINK = 1 << 5, /* -l */
FILEUTILS_MAKE_SOFTLINK = 1 << 6, /* -s */
FILEUTILS_DEREF_SOFTLINK = 1 << 7, /* -L */
FILEUTILS_DEREFERENCE_L0 = 1 << 8, /* -H */
FILEUTILS_NO_OVERWRITE = 1 << 5, /* -n */
FILEUTILS_MAKE_HARDLINK = 1 << 6, /* -l */
FILEUTILS_MAKE_SOFTLINK = 1 << 7, /* -s */
FILEUTILS_DEREF_SOFTLINK = 1 << 8, /* -L */
FILEUTILS_DEREFERENCE_L0 = 1 << 9, /* -H */
/* -a = -pdR (mapped in cp.c) */
/* -r = -dR (mapped in cp.c) */
/* -P = -d (mapped in cp.c) */
FILEUTILS_VERBOSE = (1 << 12) * ENABLE_FEATURE_VERBOSE, /* -v */
FILEUTILS_UPDATE = 1 << 13, /* -u */
FILEUTILS_NO_TARGET_DIR = 1 << 14, /* -T */
FILEUTILS_TARGET_DIR = 1 << 15, /* -t DIR */
FILEUTILS_VERBOSE = (1 << 13) * ENABLE_FEATURE_VERBOSE, /* -v */
FILEUTILS_UPDATE = 1 << 14, /* -u */
FILEUTILS_NO_TARGET_DIR = 1 << 15, /* -T */
FILEUTILS_TARGET_DIR = 1 << 16, /* -t DIR */
#if ENABLE_SELINUX
FILEUTILS_PRESERVE_SECURITY_CONTEXT = 1 << 16, /* -c */
FILEUTILS_PRESERVE_SECURITY_CONTEXT = 1 << 17, /* -c */
#endif
#define FILEUTILS_CP_OPTSTR "pdRfilsLHarPvuTt:" IF_SELINUX("c")
#define FILEUTILS_CP_OPTSTR "pdRfinlsLHarPvuTt:" IF_SELINUX("c")
/* How many bits in FILEUTILS_CP_OPTSTR? */
FILEUTILS_CP_OPTNUM = 17 - !ENABLE_SELINUX,
FILEUTILS_CP_OPTBITS = 18 - !ENABLE_SELINUX,
FILEUTILS_RMDEST = 1 << (17 - !ENABLE_SELINUX), /* --remove-destination */
FILEUTILS_RMDEST = 1 << (19 - !ENABLE_SELINUX), /* cp --remove-destination */
/* bit 18 skipped for "cp --parents" */
FILEUTILS_REFLINK = 1 << (19 - !ENABLE_SELINUX), /* cp --reflink=auto */
FILEUTILS_REFLINK_ALWAYS = 1 << (20 - !ENABLE_SELINUX), /* cp --reflink[=always] */
FILEUTILS_REFLINK = 1 << (20 - !ENABLE_SELINUX), /* cp --reflink=auto */
FILEUTILS_REFLINK_ALWAYS = 1 << (21 - !ENABLE_SELINUX), /* cp --reflink[=always] */
/*
* Hole. cp may have some bits set here,
* they should not affect remove_file()/copy_file()