mirror of
https://github.com/sheumann/hush.git
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62a90cdd74
function old new delta lsattr_main 62 143 +81 open_or_warn_stdin - 36 +36 fclose_if_not_stdin 20 47 +27 xfopen_stdin - 20 +20 tac_main 336 356 +20 cksum_main 249 259 +10 bb_argv_dash - 8 +8 su_main 448 455 +7 cmp_main 630 633 +3 passwd_main 1072 1074 +2 uudecode_main 317 315 -2 text_yank 110 108 -2 handle_incoming_and_exit 2653 2651 -2 flags 5 1 -4 write_leases 235 230 -5 fopen_or_warn_stdin 48 42 -6 fold_main 648 642 -6 static.argv_dash 8 - -8 sum_main 142 128 -14 tail_main 1237 1221 -16 sed_main 711 695 -16 cmp_xfopen_input 17 - -17 bb_cat 113 96 -17 catv_main 328 306 -22 strings_main 457 434 -23 hash_file 298 274 -24 sum_file 353 325 -28 sort_main 904 859 -45 expand_main 736 686 -50 cut_main 1116 1065 -51 md5_sha1_sum_main 549 493 -56 lsattr_args 90 - -90 read_stduu 408 255 -153 ------------------------------------------------------------------------------ (add/remove: 3/3 grow/shrink: 7/20 up/down: 214/-657) Total: -443 bytes text data bss dec hex filename 797417 658 7428 805503 c4a7f busybox_old 796973 658 7428 805059 c48c3 busybox_unstripped
141 lines
2.8 KiB
C
141 lines
2.8 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* head implementation for busybox
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*
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* Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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/* BB_AUDIT SUSv3 compliant */
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/* BB_AUDIT GNU compatible -c, -q, and -v options in 'fancy' configuration. */
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/* http://www.opengroup.org/onlinepubs/007904975/utilities/head.html */
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#include "libbb.h"
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static const char head_opts[] ALIGN1 =
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"n:"
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#if ENABLE_FEATURE_FANCY_HEAD
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"c:qv"
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#endif
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;
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#if ENABLE_FEATURE_FANCY_HEAD
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static const struct suffix_mult head_suffixes[] = {
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{ "b", 512 },
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{ "k", 1024 },
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{ "m", 1024*1024 },
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{ }
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};
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#endif
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static const char header_fmt_str[] ALIGN1 = "\n==> %s <==\n";
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int head_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int head_main(int argc, char **argv)
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{
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unsigned long count = 10;
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unsigned long i;
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#if ENABLE_FEATURE_FANCY_HEAD
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int count_bytes = 0;
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int header_threshhold = 1;
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#endif
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FILE *fp;
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const char *fmt;
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char *p;
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int opt;
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int c;
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int retval = EXIT_SUCCESS;
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#if ENABLE_INCLUDE_SUSv2 || ENABLE_FEATURE_FANCY_HEAD
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/* Allow legacy syntax of an initial numeric option without -n. */
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if (argc > 1 && argv[1][0] == '-'
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&& isdigit(argv[1][1])
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) {
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--argc;
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++argv;
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p = (*argv) + 1;
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goto GET_COUNT;
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}
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#endif
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/* No size benefit in converting this to getopt32 */
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while ((opt = getopt(argc, argv, head_opts)) > 0) {
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switch (opt) {
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#if ENABLE_FEATURE_FANCY_HEAD
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case 'q':
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header_threshhold = INT_MAX;
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break;
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case 'v':
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header_threshhold = -1;
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break;
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case 'c':
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count_bytes = 1;
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/* fall through */
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#endif
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case 'n':
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p = optarg;
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#if ENABLE_INCLUDE_SUSv2 || ENABLE_FEATURE_FANCY_HEAD
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GET_COUNT:
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#endif
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#if !ENABLE_FEATURE_FANCY_HEAD
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count = xatoul(p);
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#else
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count = xatoul_sfx(p, head_suffixes);
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#endif
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break;
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default:
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bb_show_usage();
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}
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}
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argc -= optind;
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argv += optind;
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if (!*argv)
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*--argv = (char*)"-";
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fmt = header_fmt_str + 1;
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#if ENABLE_FEATURE_FANCY_HEAD
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if (argc <= header_threshhold) {
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header_threshhold = 0;
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}
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#else
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if (argc <= 1) {
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fmt += 11; /* "" */
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}
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/* Now define some things here to avoid #ifdefs in the code below.
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* These should optimize out of the if conditions below. */
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#define header_threshhold 1
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#define count_bytes 0
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#endif
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do {
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fp = fopen_or_warn_stdin(*argv);
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if (fp) {
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if (fp == stdin) {
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*argv = (char *) bb_msg_standard_input;
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}
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if (header_threshhold) {
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printf(fmt, *argv);
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}
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i = count;
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while (i && ((c = getc(fp)) != EOF)) {
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if (count_bytes || (c == '\n')) {
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--i;
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}
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putchar(c);
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}
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if (fclose_if_not_stdin(fp)) {
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bb_simple_perror_msg(*argv); /* Avoid multibyte problems. */
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retval = EXIT_FAILURE;
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}
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die_if_ferror_stdout();
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}
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fmt = header_fmt_str;
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} while (*++argv);
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fflush_stdout_and_exit(retval);
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}
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