mirror of
https://github.com/sheumann/hush.git
synced 2024-06-26 17:29:42 +00:00
d921b2ecc0
things like xasprintf() into xfuncs.c, remove xprint_file_by_name() (it only had one user), clean up lots of #includes... General cleanup pass. What I've been doing for the last couple days. And it conflicts! I've removed httpd.c from this checkin due to somebody else touching that file. It builds for me. I have to catch a bus. (Now you know why I'm looking forward to Mercurial.)
142 lines
2.9 KiB
C
142 lines
2.9 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 "busybox.h"
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static const char head_opts[] =
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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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{ NULL, 0 }
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};
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#endif
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static const char header_fmt_str[] = "\n==> %s <==\n";
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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_DEBUG_YANK_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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&& (((unsigned int)(argv[1][1] - '0')) <= 9)
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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 bb_getopt_ulflags */
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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_DEBUG_YANK_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 = bb_xgetularg10(p);
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#else
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count = bb_xgetularg_bnd_sfx(p, 10,
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0, ULONG_MAX,
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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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argv += optind;
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if (!*argv) {
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*--argv = "-";
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}
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fmt = header_fmt_str + 1;
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#if ENABLE_FEATURE_FANCY_HEAD
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if (argc - optind <= header_threshhold) {
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header_threshhold = 0;
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}
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#else
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if (argc <= optind + 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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if ((fp = bb_wfopen_input(*argv)) != NULL) {
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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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bb_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 (bb_fclose_nonstdin(fp)) {
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bb_perror_msg("%s", *argv); /* Avoid multibyte problems. */
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retval = EXIT_FAILURE;
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}
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xferror_stdout();
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}
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fmt = header_fmt_str;
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} while (*++argv);
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bb_fflush_stdout_and_exit(retval);
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}
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