busybox/coreutils/nl.c

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/* vi: set sw=4 ts=4: */
/*
* Copyright (C) 2017 Denys Vlasenko <vda.linux@googlemail.com>
*
* Licensed under GPLv2, see file LICENSE in this source tree.
*/
//config:config NL
//config: bool "nl (4.6 kb)"
//config: default y
//config: help
//config: nl is used to number lines of files.
//applet:IF_NL(APPLET(nl, BB_DIR_USR_BIN, BB_SUID_DROP))
//kbuild:lib-$(CONFIG_NL) += nl.o
//usage:#define nl_trivial_usage
//usage: "[OPTIONS] [FILE]..."
//usage:#define nl_full_usage "\n\n"
//usage: "Write FILEs to standard output with line numbers added\n"
//usage: "\n -b STYLE Which lines to number - a: all, t: nonempty, n: none"
//^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^TODO: support "pBRE": number only lines thatmatch regexp BRE"
////usage: "\n -f STYLE footer lines"
////usage: "\n -h STYLE header lines"
////usage: "\n -d CC use CC for separating logical pages"
//usage: "\n -i N Line number increment"
////usage: "\n -l NUMBER group of NUMBER empty lines counted as one"
////usage: "\n -n FORMAT lneft justified, no leading zeros; rn or rz"
////usage: "\n -p do not reset line numbers at logical pages (huh?)"
//usage: "\n -s STRING Use STRING as line number separator"
//usage: "\n -v N Start from N"
//usage: "\n -w N Width of line numbers"
/* By default, selects -v1 -i1 -l1 -sTAB -w6 -nrn -hn -bt -fn */
#include "libbb.h"
int nl_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int nl_main(int argc UNUSED_PARAM, char **argv)
{
struct number_state ns;
const char *opt_b = "t";
enum {
OPT_p = (1 << 0),
};
#if ENABLE_LONG_OPTS
static const char nl_longopts[] ALIGN1 =
"body-numbering\0" Required_argument "b"
// "footer-numbering\0" Required_argument "f" - not implemented yet
// "header-numbering\0" Required_argument "h" - not implemented yet
// "section-delimiter\0" Required_argument "d" - not implemented yet
"line-increment\0" Required_argument "i"
// "join-blank-lines\0" Required_argument "l" - not implemented yet
// "number-format\0" Required_argument "n" - not implemented yet
"no-renumber\0" No_argument "p" // no-op so far
"number-separator\0" Required_argument "s"
"starting-line-number\0"Required_argument "v"
"number-width\0" Required_argument "w"
;
#endif
int exitcode;
ns.width = 6;
ns.start = 1;
ns.inc = 1;
ns.sep = "\t";
getopt32: remove applet_long_options FEATURE_GETOPT_LONG made dependent on LONG_OPTS. The folloving options are removed, now LONG_OPTS enables long options for affected applets: FEATURE_ENV_LONG_OPTIONS FEATURE_EXPAND_LONG_OPTIONS FEATURE_UNEXPAND_LONG_OPTIONS FEATURE_MKDIR_LONG_OPTIONS FEATURE_MV_LONG_OPTIONS FEATURE_RMDIR_LONG_OPTIONS FEATURE_ADDGROUP_LONG_OPTIONS FEATURE_ADDUSER_LONG_OPTIONS FEATURE_HWCLOCK_LONG_OPTIONS FEATURE_NSENTER_LONG_OPTS FEATURE_CHCON_LONG_OPTIONS FEATURE_RUNCON_LONG_OPTIONS They either had a small number of long options, or their long options are essential. Example: upstream addgroup and adduser have ONLY longopts, we should probably go further and get rid of non-standard short options. To this end, make addgroup and adduser "select LONG_OPTS". We had this breakage caused by us even in our own package! #if ENABLE_LONG_OPTS || !ENABLE_ADDGROUP /* We try to use --gid, not -g, because "standard" addgroup * has no short option -g, it has only long --gid. */ argv[1] = (char*)"--gid"; #else /* Breaks if system in fact does NOT use busybox addgroup */ argv[1] = (char*)"-g"; #endif xargs: its lone longopt no longer depends on DESKTOP, only on LONG_OPTS. hwclock TODO: get rid of incompatible -t, -l aliases to --systz, --localtime Shorten help texts by omitting long option when short opt alternative exists. Reduction of size comes from the fact that store of an immediate (an address of longopts) to a fixed address (global variable) is a longer insn than pushing that immediate or passing it in a register. This effect is CPU-agnostic. function old new delta getopt32 1350 22 -1328 vgetopt32 - 1318 +1318 getopt32long - 24 +24 tftpd_main 562 567 +5 scan_recursive 376 380 +4 collect_cpu 545 546 +1 date_main 1096 1095 -1 hostname_main 262 259 -3 uname_main 259 255 -4 setpriv_main 362 358 -4 rmdir_main 191 187 -4 mv_main 562 558 -4 ipcalc_main 548 544 -4 ifenslave_main 641 637 -4 gzip_main 192 188 -4 gunzip_main 77 73 -4 fsfreeze_main 81 77 -4 flock_main 318 314 -4 deluser_main 337 333 -4 cp_main 374 370 -4 chown_main 175 171 -4 applet_long_options 4 - -4 xargs_main 894 889 -5 wget_main 2540 2535 -5 udhcpc_main 2767 2762 -5 touch_main 436 431 -5 tar_main 1014 1009 -5 start_stop_daemon_main 1033 1028 -5 sed_main 682 677 -5 script_main 1082 1077 -5 run_parts_main 330 325 -5 rtcwake_main 459 454 -5 od_main 2169 2164 -5 nl_main 201 196 -5 modprobe_main 773 768 -5 mkdir_main 160 155 -5 ls_main 568 563 -5 install_main 773 768 -5 hwclock_main 411 406 -5 getopt_main 622 617 -5 fstrim_main 256 251 -5 env_main 198 193 -5 dumpleases_main 635 630 -5 dpkg_main 3991 3986 -5 diff_main 1355 1350 -5 cryptpw_main 233 228 -5 cpio_main 593 588 -5 conspy_main 1135 1130 -5 chpasswd_main 313 308 -5 adduser_main 887 882 -5 addgroup_main 416 411 -5 ftpgetput_main 351 345 -6 get_terminal_width_height 242 234 -8 expand_main 690 680 -10 static.expand_longopts 18 - -18 static.unexpand_longopts 27 - -27 mkdir_longopts 28 - -28 env_longopts 30 - -30 static.ifenslave_longopts 34 - -34 mv_longopts 46 - -46 static.rmdir_longopts 48 - -48 packed_usage 31739 31687 -52 ------------------------------------------------------------------------------ (add/remove: 2/8 grow/shrink: 3/49 up/down: 1352/-1840) Total: -488 bytes text data bss dec hex filename 915681 485 6880 923046 e15a6 busybox_old 915428 485 6876 922789 e14a5 busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-08 20:08:18 +05:30
getopt32long(argv, "pw:+s:v:+i:+b:", nl_longopts,
&ns.width, &ns.sep, &ns.start, &ns.inc, &opt_b);
ns.all = (opt_b[0] == 'a');
ns.nonempty = (opt_b[0] == 't');
ns.empty_str = xasprintf("%*s\n", ns.width + (int)strlen(ns.sep), "");
argv += optind;
if (!*argv)
*--argv = (char*)"-";
exitcode = EXIT_SUCCESS;
do {
exitcode |= print_numbered_lines(&ns, *argv);
} while (*++argv);
fflush_stdout_and_exit(exitcode);
}