1 /* vi: set sw=4 ts=4: */
2 /*
3 * Copyright (C) 2017 Denys Vlasenko <vda.linux@googlemail.com>
4 *
5 * Licensed under GPLv2, see file LICENSE in this source tree.
6 */
7 //config:config NL
8 //config: bool "nl (4.6 kb)"
9 //config: default y
10 //config: help
11 //config: nl is used to number lines of files.
12
13 //applet:IF_NL(APPLET(nl, BB_DIR_USR_BIN, BB_SUID_DROP))
14
15 //kbuild:lib-$(CONFIG_NL) += nl.o
16
17 //usage:#define nl_trivial_usage
18 //usage: "[OPTIONS] [FILE]..."
19 //usage:#define nl_full_usage "\n\n"
20 //usage: "Write FILEs to standard output with line numbers added\n"
21 //usage: "\n -b STYLE Which lines to number - a: all, t: nonempty, n: none"
22 //^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^TODO: support "pBRE": number only lines that match regexp BRE"
23 ////usage: "\n -f STYLE footer lines"
24 ////usage: "\n -h STYLE header lines"
25 ////usage: "\n -d CC use CC for separating logical pages"
26 //usage: "\n -i N Line number increment"
27 ////usage: "\n -l NUMBER group of NUMBER empty lines counted as one"
28 ////usage: "\n -n FORMAT lneft justified, no leading zeros; rn or rz"
29 ////usage: "\n -p do not reset line numbers at logical pages (huh?)"
30 //usage: "\n -s STRING Use STRING as line number separator"
31 //usage: "\n -v N Start from N"
32 //usage: "\n -w N Width of line numbers"
33
34 /* By default, selects -v1 -i1 -l1 -sTAB -w6 -nrn -hn -bt -fn */
35
36 #include "libbb.h"
37
38 int nl_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
nl_main(int argc UNUSED_PARAM,char ** argv)39 int nl_main(int argc UNUSED_PARAM, char **argv)
40 {
41 struct number_state ns;
42 const char *opt_b = "t";
43 enum {
44 OPT_p = (1 << 0),
45 };
46 #if ENABLE_LONG_OPTS
47 static const char nl_longopts[] ALIGN1 =
48 "body-numbering\0" Required_argument "b"
49 // "footer-numbering\0" Required_argument "f" - not implemented yet
50 // "header-numbering\0" Required_argument "h" - not implemented yet
51 // "section-delimiter\0" Required_argument "d" - not implemented yet
52 "line-increment\0" Required_argument "i"
53 // "join-blank-lines\0" Required_argument "l" - not implemented yet
54 // "number-format\0" Required_argument "n" - not implemented yet
55 "no-renumber\0" No_argument "p" // no-op so far
56 "number-separator\0" Required_argument "s"
57 "starting-line-number\0"Required_argument "v"
58 "number-width\0" Required_argument "w"
59 ;
60 #endif
61 int exitcode;
62
63 ns.width = 6;
64 ns.start = 1;
65 ns.inc = 1;
66 ns.sep = "\t";
67 getopt32long(argv, "pw:+s:v:+i:+b:", nl_longopts,
68 &ns.width, &ns.sep, &ns.start, &ns.inc, &opt_b);
69 ns.all = (opt_b[0] == 'a');
70 ns.nonempty = (opt_b[0] == 't');
71 ns.empty_str = xasprintf("%*s", ns.width + (int)strlen(ns.sep), "");
72
73 argv += optind;
74 if (!*argv)
75 *--argv = (char*)"-";
76
77 exitcode = EXIT_SUCCESS;
78 do {
79 exitcode |= print_numbered_lines(&ns, *argv);
80 } while (*++argv);
81
82 fflush_stdout_and_exit(exitcode);
83 }
84