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/* vi: set sw=4 ts=4: */
/*
* cat implementation for busybox
*
* Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
*
* Licensed under GPLv2, see file LICENSE in this tarball for details.
*/
/* BB_AUDIT SUSv3 compliant */
/* http://www.opengroup.org/onlinepubs/007904975/utilities/cat.html */
//kbuild:lib-$(CONFIG_CAT) += cat.o
//kbuild:lib-$(CONFIG_MORE) += cat.o # more uses it if stdout isn't a tty
//kbuild:lib-$(CONFIG_LESS) += cat.o # less too
//kbuild:lib-$(CONFIG_CRONTAB) += cat.o # crontab -l
//config:config CAT
//config: bool "cat"
//config: default y
//config: help
//config: cat is used to concatenate files and print them to the standard
//config: output. Enable this option if you wish to enable the 'cat' utility.
#include "libbb.h"
/* This is a NOFORK applet. Be very careful! */
int bb_cat(char **argv)
{
int fd;
int retval = EXIT_SUCCESS;
if (!*argv)
argv = (char**) &bb_argv_dash;
do {
fd = open_or_warn_stdin(*argv);
if (fd >= 0) {
/* This is not a xfunc - never exits */
off_t r = bb_copyfd_eof(fd, STDOUT_FILENO);
if (fd != STDIN_FILENO)
close(fd);
if (r >= 0)
continue;
}
retval = EXIT_FAILURE;
} while (*++argv);
return retval;
}
int cat_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int cat_main(int argc UNUSED_PARAM, char **argv)
{
getopt32(argv, "u");
argv += optind;
return bb_cat(argv);
}
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