53 lines
1.0 KiB
C
53 lines
1.0 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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#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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static const char *const argv_dash[] = { "-", NULL };
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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**) &argv_dash;
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do {
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fd = STDIN_FILENO;
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if (!LONE_DASH(*argv))
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fd = open_or_warn(*argv, O_RDONLY);
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if (fd >= 0) {
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/* This is not an 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, 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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