68 lines
1.5 KiB
C
68 lines
1.5 KiB
C
/* 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 source tree.
|
|
*/
|
|
//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.
|
|
|
|
//applet:IF_CAT(APPLET_NOFORK(cat, cat, BB_DIR_BIN, BB_SUID_DROP, cat))
|
|
|
|
//kbuild:lib-$(CONFIG_CAT) += cat.o
|
|
|
|
/* BB_AUDIT SUSv3 compliant */
|
|
/* http://www.opengroup.org/onlinepubs/007904975/utilities/cat.html */
|
|
|
|
//usage:#define cat_trivial_usage
|
|
//usage: "[FILE]..."
|
|
//usage:#define cat_full_usage "\n\n"
|
|
//usage: "Concatenate FILEs and print them to stdout"
|
|
//usage:
|
|
//usage:#define cat_example_usage
|
|
//usage: "$ cat /proc/uptime\n"
|
|
//usage: "110716.72 17.67"
|
|
|
|
#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);
|
|
}
|