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68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* cat 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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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/* BB_AUDIT SUSv3 compliant */
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/* http://www.opengroup.org/onlinepubs/007904975/utilities/cat.html */
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/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
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*
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* This is a new implementation of 'cat' which aims to be SUSv3 compliant.
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*
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* Changes from the previous implementation include:
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* 1) Multiple '-' args are accepted as required by SUSv3. The previous
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* implementation would close stdin and segfault on a subsequent '-'.
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* 2) The '-u' options is required by SUSv3. Note that the specified
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* behavior for '-u' is done by default, so all we need do is accept
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* the option.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include "busybox.h"
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int cat_main(int argc, char **argv)
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{
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FILE *f;
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int retval = EXIT_SUCCESS;
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bb_getopt_ulflags(argc, argv, "u");
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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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do {
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if ((f = bb_wfopen_input(*argv)) != NULL) {
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int r = bb_copyfd_eof(fileno(f), STDOUT_FILENO);
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bb_fclose_nonstdin(f);
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if (r >= 0) {
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continue;
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}
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}
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retval = EXIT_FAILURE;
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} while (*++argv);
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return retval;
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}
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