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authornobody <nobody@localhost>2004-10-13 09:42:10 +0000
committernobody <nobody@localhost>2004-10-13 09:42:10 +0000
commit8c59a0bf0e9e2d87b0ff273ea3f0bf05bbbf6373 (patch)
tree1826706cd4fd009fcd14f4f8021005ec8ec0fa59 /busybox/coreutils/cat.c
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This commit was manufactured by cvs2svn to create tag 'busybox_1_00'.
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1/* vi: set sw=4 ts=4: */
2/*
3 * cat implementation for busybox
4 *
5 * Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 *
21 */
22
23/* BB_AUDIT SUSv3 compliant */
24/* http://www.opengroup.org/onlinepubs/007904975/utilities/cat.html */
25
26/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
27 *
28 * This is a new implementation of 'cat' which aims to be SUSv3 compliant.
29 *
30 * Changes from the previous implementation include:
31 * 1) Multiple '-' args are accepted as required by SUSv3. The previous
32 * implementation would close stdin and segfault on a subsequent '-'.
33 * 2) The '-u' options is required by SUSv3. Note that the specified
34 * behavior for '-u' is done by default, so all we need do is accept
35 * the option.
36 */
37
38#include <stdlib.h>
39#include <stdio.h>
40#include <unistd.h>
41#include "busybox.h"
42
43extern int cat_main(int argc, char **argv)
44{
45 FILE *f;
46 int retval = EXIT_SUCCESS;
47
48 bb_getopt_ulflags(argc, argv, "u");
49
50 argv += optind;
51 if (!*argv) {
52 *--argv = "-";
53 }
54
55 do {
56 if ((f = bb_wfopen_input(*argv)) != NULL) {
57 int r = bb_copyfd_eof(fileno(f), STDOUT_FILENO);
58 bb_fclose_nonstdin(f);
59 if (r >= 0) {
60 continue;
61 }
62 }
63 retval = EXIT_FAILURE;
64 } while (*++argv);
65
66 return retval;
67}