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61 lines
1.4 KiB
C
61 lines
1.4 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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* Licensed under GPLv2, see file License in this tarball for details.
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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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//kbuild:lib-$(CONFIG_CAT) += cat.o
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//kbuild:lib-$(CONFIG_MORE) += cat.o # more uses it if stdout isn't a tty
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//kbuild:lib-$(CONFIG_LESS) += cat.o # less too
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//kbuild:lib-$(CONFIG_CRONTAB) += cat.o # crontab -l
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//config:config CAT
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//config: bool "cat"
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//config: default y
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//config: help
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//config: cat is used to concatenate files and print them to the standard
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//config: output. Enable this option if you wish to enable the 'cat' utility.
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#include "libbb.h"
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/* This is a NOFORK applet. Be very careful! */
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int bb_cat(char **argv)
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{
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int fd;
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int retval = EXIT_SUCCESS;
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if (!*argv)
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argv = (char**) &bb_argv_dash;
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do {
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fd = open_or_warn_stdin(*argv);
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if (fd >= 0) {
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/* This is not a xfunc - never exits */
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off_t r = bb_copyfd_eof(fd, STDOUT_FILENO);
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if (fd != STDIN_FILENO)
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close(fd);
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if (r >= 0)
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continue;
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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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int cat_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int cat_main(int argc UNUSED_PARAM, char **argv)
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{
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getopt32(argv, "u");
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argv += optind;
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return bb_cat(argv);
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}
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