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