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ls: make -Z output compatible with GNU coreutils 8.25

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This also makes it clear that LIST_MODEBITS == LIST_LOPT

function                                             old     new   delta
ls_main                                              752     777     +25
display_files                                        400     399      -1
display_single                                      1055    1053      -2
my_stat                                              320     317      -3
packed_usage                                       32311   32280     -31
.rodata                                           168895  168864     -31
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/5 up/down: 25/-68)            Total: -43 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2017-01-23 19:30:14 +01:00
parent 2c3131d88e
commit a1cbaca1ba
1 changed files with 24 additions and 19 deletions
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43
coreutils/ls.c
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@ -154,7 +154,6 @@
//usage: )
//usage: "\n -r Reverse sort order"
//usage: IF_SELINUX(
//usage: "\n -k List security context"
//usage: "\n -Z List security context and permission"
//usage: )
//usage: IF_FEATURE_LS_WIDTH(
@ -198,16 +197,14 @@ SPLIT_SUBDIR = 2,
/* 51306 lrwxrwxrwx 1 root root 2 May 11 01:43 /bin/view -> vi* */
/* what file information will be listed */
LIST_MODEBITS = 1 << 0,
LIST_LOPT = 1 << 1, /* long listing (-l and equivalents) */
LIST_ID_NAME = 1 << 2,
LIST_ID_NUMERIC = 1 << 3,
LIST_CONTEXT = 1 << 4,
LIST_FULLTIME = 1 << 5,
LIST_FILETYPE = 1 << 6, /* show / suffix for dirs */
LIST_CLASSIFY = 1 << 7, /* requires LIST_FILETYPE, also show *,|,@,= suffixes */
LIST_LONG = LIST_LOPT | LIST_MODEBITS | LIST_ID_NAME,
LIST_LONG = LIST_LOPT | LIST_ID_NAME,
/* what files will be displayed */
DISP_DIRNAME = 1 << 8, /* 2 or more items? label directories */
@ -225,8 +222,8 @@ STYLE_MASK = STYLE_SINGLE,
/* -Cadi1l Std options, busybox always supports */
/* -gnsxA Std options, busybox always supports */
/* -Q GNU option, busybox always supports */
/* -k SELinux option, busybox always supports (ignores if !SELinux) */
/* Std has -k which means "for -s, show sizes in kbytes" */
/* -k Std options, busybox always supports (by ignoring) */
/* It means "for -s, show sizes in kbytes" */
/* Seems to only affect "POSIXLY_CORRECT=1 ls -sk" */
/* since otherwise -s shows kbytes anyway */
/* -LHRctur Std options, busybox optionally supports */
@ -317,7 +314,7 @@ static const uint32_t opt_flags[] = {
0, /* s */
DISP_ROWS | STYLE_COLUMNAR, /* x */
0, /* A */
ENABLE_SELINUX * (LIST_CONTEXT|STYLE_SINGLE), /* k (ignored if !SELINUX) */
0, /* k (ignored) */
#if ENABLE_FEATURE_LS_FILETYPES
LIST_FILETYPE | LIST_CLASSIFY, /* F */
LIST_FILETYPE, /* p */
@ -326,7 +323,7 @@ static const uint32_t opt_flags[] = {
DISP_RECURSIVE, /* R */
#endif
#if ENABLE_SELINUX
LIST_MODEBITS|LIST_ID_NAME|LIST_CONTEXT|STYLE_SINGLE, /* Z */
0, /* Z */
#endif
(1U << 31)
/* options after Z are not processed through opt_flags */
@ -554,10 +551,12 @@ static NOINLINE unsigned display_single(const struct dnode *dn)
//TODO: -h should affect -s too:
if (option_mask32 & OPT_s) /* show allocated blocks */
column += printf("%6"OFF_FMT"u ", (off_t) (dn->dn_blocks >> 1));
if (G.all_fmt & LIST_MODEBITS)
if (G.all_fmt & LIST_LOPT) {
/* long listing: show mode */
column += printf("%-10s ", (char *) bb_mode_string(dn->dn_mode));
if (G.all_fmt & LIST_LOPT) /* long listing: show number of links */
/* long listing: show number of links */
column += printf("%4lu ", (long) dn->dn_nlink);
}
if (G.all_fmt & LIST_ID_NUMERIC) {
if (option_mask32 & OPT_g)
column += printf("%-8u ", (int) dn->dn_gid);
@ -577,6 +576,12 @@ static NOINLINE unsigned display_single(const struct dnode *dn)
get_cached_groupname(dn->dn_gid));
}
}
#endif
#if ENABLE_SELINUX
if (option_mask32 & OPT_Z) {
column += printf("%-32s ", dn->sid ? dn->sid : "?");
freecon(dn->sid);
}
#endif
if (G.all_fmt & LIST_LOPT) {
/* long listing: show size */
@ -624,12 +629,6 @@ static NOINLINE unsigned display_single(const struct dnode *dn)
}
#endif
}
#if ENABLE_SELINUX
if (G.all_fmt & LIST_CONTEXT) {
column += printf("%-32s ", dn->sid ? dn->sid : "unknown");
freecon(dn->sid);
}
#endif
#if ENABLE_FEATURE_LS_COLOR
if (G_show_color) {
@ -698,7 +697,7 @@ static void display_files(struct dnode **dn, unsigned nfiles)
column_width = len;
}
column_width += 2
IF_SELINUX(+ ((G.all_fmt & LIST_CONTEXT) ? 33 : 0))
+ ((option_mask32 & OPT_Z) ? 33 : 0) /* context width */
+ ((option_mask32 & OPT_i) ? 8 : 0) /* inode# width */
+ ((option_mask32 & OPT_s) ? 5 : 0) /* "alloc block" width */
;
@ -752,7 +751,7 @@ static struct dnode *my_stat(const char *fullname, const char *name, int force_f
if ((option_mask32 & OPT_L) || force_follow) {
#if ENABLE_SELINUX
if (is_selinux_enabled()) {
if (option_mask32 & OPT_Z) {
getfilecon(fullname, &cur->sid);
}
#endif
@ -765,7 +764,7 @@ static struct dnode *my_stat(const char *fullname, const char *name, int force_f
cur->dn_mode_stat = statbuf.st_mode;
} else {
#if ENABLE_SELINUX
if (is_selinux_enabled()) {
if (option_mask32 & OPT_Z) {
lgetfilecon(fullname, &cur->sid);
}
#endif
@ -1182,6 +1181,12 @@ int ls_main(int argc UNUSED_PARAM, char **argv)
G.all_fmt |= flags;
}
}
#if ENABLE_SELINUX
if (opt & OPT_Z) {
if (!is_selinux_enabled())
option_mask32 &= ~OPT_Z;
}
#endif
if (opt & OPT_full_time)
G.all_fmt |= LIST_FULLTIME;