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ls: get rid of opt_flags[], handle -l1c through option_mask32

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function                                             old     new   delta
display_single                                       885     888      +3
scan_and_display_dirs_recur                          496     486     -10
opt_flags                                             11       -     -11
ls_main                                              618     553     -65
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 1/2 up/down: 3/-86)             Total: -83 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2017-01-23 20:43:06 +01:00
parent 92c6898e10
commit ccc1699e3e
1 changed files with 33 additions and 67 deletions
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100
coreutils/ls.c
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@ -194,16 +194,8 @@ SPLIT_DIR = 1,
SPLIT_SUBDIR = 2,
/* Bits in G.all_fmt: */
LIST_LONG = 1 << 0, /* long listing (-l and equivalents) */
/* what files will be displayed */
DISP_DIRNAME = 1 << 1, /* 2 or more items? label directories */
/* what is the overall style of the listing */
STYLE_COLUMNAR = 1 << 2, /* many records per line */
STYLE_LONG = 2 << 2, /* one record per line, extended info */
STYLE_SINGLE = 3 << 2, /* one record per line */
STYLE_MASK = STYLE_SINGLE,
DISP_DIRNAME = 1 << 9, /* 2 or more items? label directories */
};
/* -Cadi1l Std options, busybox always supports */
@ -231,11 +223,11 @@ static const char ls_options[] ALIGN1 =
IF_FEATURE_LS_WIDTH("T:w:") /* 2, 29 */
;
enum {
//OPT_C = (1 << 0),
OPT_C = (1 << 0),
OPT_a = (1 << 1),
OPT_d = (1 << 2),
OPT_i = (1 << 3),
//OPT_1 = (1 << 4),
OPT_1 = (1 << 4),
OPT_l = (1 << 5),
OPT_g = (1 << 6),
OPT_n = (1 << 7),
@ -288,23 +280,6 @@ enum {
OPT_color = (1 << OPTBIT_color ) * ENABLE_FEATURE_LS_COLOR,
};
/* TODO: simple toggles may be stored as OPT_xxx bits instead */
static const uint8_t opt_flags[] = {
STYLE_COLUMNAR, /* C */
0, /* a */
0, /* d */
0, /* i */
STYLE_SINGLE, /* 1 */
LIST_LONG | STYLE_LONG, /* l - by keeping it after -1, "ls -l -1" ignores -1 */
LIST_LONG | STYLE_LONG, /* g (don't show owner) - handled via OPT_g. assumes l */
LIST_LONG | STYLE_LONG, /* n (numeris uid/gid) - handled via OPT_n. assumes l */
0, /* s */
STYLE_COLUMNAR, /* x */
0xff
/* options after -x are not processed through opt_flags */
};
/*
* a directory entry and its stat info
*/
@ -465,8 +440,8 @@ static unsigned calc_name_len(const char *name)
}
/* Return the number of used columns.
* Note that only STYLE_COLUMNAR uses return value.
* STYLE_SINGLE and STYLE_LONG don't care.
* Note that only columnar output uses return value.
* -l and -1 modes don't care.
* coreutils 7.2 also supports:
* ls -b (--escape) = octal escapes (although it doesn't look like working)
* ls -N (--literal) = not escape at all
@ -499,13 +474,14 @@ static unsigned print_name(const char *name)
}
/* Return the number of used columns.
* Note that only STYLE_COLUMNAR uses return value,
* STYLE_SINGLE and STYLE_LONG don't care.
* Note that only columnar output uses return value,
* -l and -1 modes don't care.
*/
static NOINLINE unsigned display_single(const struct dnode *dn)
{
unsigned column = 0;
char *lpath;
int opt;
#if ENABLE_FEATURE_LS_FILETYPES || ENABLE_FEATURE_LS_COLOR
struct stat statbuf;
char append;
@ -514,27 +490,28 @@ static NOINLINE unsigned display_single(const struct dnode *dn)
#if ENABLE_FEATURE_LS_FILETYPES
append = append_char(dn->dn_mode);
#endif
opt = option_mask32;
/* Do readlink early, so that if it fails, error message
* does not appear *inside* the "ls -l" line */
lpath = NULL;
if (G.all_fmt & LIST_LONG)
if (opt & OPT_l)
if (S_ISLNK(dn->dn_mode))
lpath = xmalloc_readlink_or_warn(dn->fullname);
if (option_mask32 & OPT_i) /* show inode# */
if (opt & OPT_i) /* show inode# */
column += printf("%7llu ", (long long) dn->dn_ino);
//TODO: -h should affect -s too:
if (option_mask32 & OPT_s) /* show allocated blocks */
if (opt & OPT_s) /* show allocated blocks */
column += printf("%6"OFF_FMT"u ", (off_t) (dn->dn_blocks >> 1));
if (G.all_fmt & LIST_LONG) {
if (opt & OPT_l) {
/* long listing: show mode */
column += printf("%-10s ", (char *) bb_mode_string(dn->dn_mode));
/* long listing: show number of links */
column += printf("%4lu ", (long) dn->dn_nlink);
/* long listing: show user/group */
if (option_mask32 & OPT_n) {
if (option_mask32 & OPT_g)
if (opt & OPT_n) {
if (opt & OPT_g)
column += printf("%-8u ", (int) dn->dn_gid);
else
column += printf("%-8u %-8u ",
@ -543,7 +520,7 @@ static NOINLINE unsigned display_single(const struct dnode *dn)
}
#if ENABLE_FEATURE_LS_USERNAME
else {
if (option_mask32 & OPT_g) {
if (opt & OPT_g) {
column += printf("%-8.8s ",
get_cached_groupname(dn->dn_gid));
} else {
@ -555,11 +532,11 @@ static NOINLINE unsigned display_single(const struct dnode *dn)
#endif
#if ENABLE_SELINUX
}
if (option_mask32 & OPT_Z) {
if (opt & OPT_Z) {
column += printf("%-32s ", dn->sid ? dn->sid : "?");
freecon(dn->sid);
}
if (G.all_fmt & LIST_LONG) {
if (opt & OPT_l) {
#endif
/* long listing: show size */
if (S_ISBLK(dn->dn_mode) || S_ISCHR(dn->dn_mode)) {
@ -567,7 +544,7 @@ static NOINLINE unsigned display_single(const struct dnode *dn)
dn->dn_rdev_maj,
dn->dn_rdev_min);
} else {
if (option_mask32 & OPT_h) {
if (opt & OPT_h) {
column += printf("%"HUMAN_READABLE_MAX_WIDTH_STR"s ",
/* print size, show one fractional, use suffixes */
make_human_readable_str(dn->dn_size, 1, 0)
@ -578,7 +555,7 @@ static NOINLINE unsigned display_single(const struct dnode *dn)
}
#if ENABLE_FEATURE_LS_TIMESTAMPS
/* long listing: show {m,c,a}time */
if (option_mask32 & OPT_full_time) { /* --full-time */
if (opt & OPT_full_time) { /* --full-time */
/* coreutils 8.4 ls --full-time prints:
* 2009-07-13 17:49:27.000000000 +0200
* we don't show fractional seconds.
@ -624,7 +601,7 @@ static NOINLINE unsigned display_single(const struct dnode *dn)
if (lpath) {
printf(" -> ");
#if ENABLE_FEATURE_LS_FILETYPES || ENABLE_FEATURE_LS_COLOR
if ((option_mask32 & (OPT_F|OPT_p))
if ((opt & (OPT_F|OPT_p))
|| G_show_color
) {
mode_t mode = dn->dn_mode_stat;
@ -648,7 +625,7 @@ static NOINLINE unsigned display_single(const struct dnode *dn)
}
}
#if ENABLE_FEATURE_LS_FILETYPES
if (option_mask32 & (OPT_F|OPT_p)) {
if (opt & (OPT_F|OPT_p)) {
if (append) {
putchar(append);
column++;
@ -664,9 +641,9 @@ static void display_files(struct dnode **dn, unsigned nfiles)
unsigned i, ncols, nrows, row, nc;
unsigned column;
unsigned nexttab;
unsigned column_width = 0; /* used only by STYLE_COLUMNAR */
unsigned column_width = 0; /* used only by coulmnal output */
if (G.all_fmt & STYLE_LONG) { /* STYLE_LONG or STYLE_SINGLE */
if (option_mask32 & (OPT_l|OPT_1)) {
ncols = 1;
} else {
/* find the longest file name, use that as the column width */
@ -1043,9 +1020,7 @@ static void scan_and_display_dirs_recur(struct dnode **dn, int first)
}
subdnp = scan_one_dir((*dn)->fullname, &nfiles);
#if ENABLE_DESKTOP
if ((G.all_fmt & STYLE_MASK) == STYLE_LONG
|| (option_mask32 & OPT_s)
) {
if (option_mask32 & (OPT_s|OPT_l)) {
printf("total %"OFF_FMT"u\n", calculate_blocks(subdnp));
}
#endif
@ -1124,8 +1099,10 @@ int ls_main(int argc UNUSED_PARAM, char **argv)
/* process options */
IF_FEATURE_LS_COLOR(applet_long_options = ls_longopts;)
opt_complementary =
/* -n and -g imply -l */
"nl:gl"
/* --full-time implies -l */
IF_FEATURE_LS_TIMESTAMPS(IF_LONG_OPTS("\xff""l"))
IF_FEATURE_LS_TIMESTAMPS(IF_LONG_OPTS(":\xff""l"))
/* http://pubs.opengroup.org/onlinepubs/9699919799/utilities/ls.html:
* in some pairs of opts, only last one takes effect:
*/
@ -1139,7 +1116,7 @@ int ls_main(int argc UNUSED_PARAM, char **argv)
/* -w NUM: */
IF_FEATURE_LS_WIDTH(":w+");
opt = getopt32(argv, ls_options
IF_FEATURE_LS_WIDTH(, NULL, &G_terminal_width)
IF_FEATURE_LS_WIDTH(, /*-T*/ NULL, /*-w*/ &G_terminal_width)
IF_FEATURE_LS_COLOR(, &color_opt)
);
#if 0 /* option bits debug */
@ -1152,16 +1129,7 @@ int ls_main(int argc UNUSED_PARAM, char **argv)
if (opt & OPT_full_time ) bb_error_msg("--full-time");
exit(0);
#endif
for (i = 0; opt_flags[i] != 0xff; i++) {
if (opt & (1 << i)) {
uint32_t flags = opt_flags[i];
if (flags & STYLE_MASK)
G.all_fmt &= ~STYLE_MASK;
G.all_fmt |= flags;
}
}
#if ENABLE_SELINUX
if (opt & OPT_Z) {
if (!is_selinux_enabled())
@ -1197,7 +1165,7 @@ int ls_main(int argc UNUSED_PARAM, char **argv)
/* sort out which command line options take precedence */
if (ENABLE_FEATURE_LS_RECURSIVE && (opt & OPT_d))
option_mask32 &= ~OPT_R; /* no recurse if listing only dir */
if ((G.all_fmt & STYLE_MASK) != STYLE_LONG) { /* not -l? */
if (!(opt & OPT_l)) { /* not -l? */
if (ENABLE_FEATURE_LS_TIMESTAMPS && ENABLE_FEATURE_LS_SORTFILES) {
/* when to sort by time? -t[cu] sorts by time even with -l */
/* (this is achieved by opt_flags[] element for -t) */
@ -1210,8 +1178,8 @@ int ls_main(int argc UNUSED_PARAM, char **argv)
}
/* choose a display format if one was not already specified by an option */
if (!(G.all_fmt & STYLE_MASK))
G.all_fmt |= (isatty(STDOUT_FILENO) ? STYLE_COLUMNAR : STYLE_SINGLE);
if (!(option_mask32 & (OPT_l|OPT_1|OPT_x|OPT_C)))
option_mask32 |= (isatty(STDOUT_FILENO) ? OPT_C : OPT_1);
argv += optind;
if (!argv[0])
@ -1226,9 +1194,7 @@ int ls_main(int argc UNUSED_PARAM, char **argv)
do {
cur = my_stat(*argv, *argv,
/* follow links on command line unless -l, -s or -F: */
!((G.all_fmt & STYLE_MASK) == STYLE_LONG
|| (option_mask32 & (OPT_s|OPT_F))
)
!(option_mask32 & (OPT_l|OPT_s|OPT_F))
/* ... or if -H: */
|| (option_mask32 & OPT_H)
/* ... or if -L, but my_stat always follows links if -L */