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1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * cat implementation for busybox
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4 | *
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5 | * Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
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6 | *
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7 | * Licensed under GPLv2, see file License in this tarball for details.
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8 | */
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9 |
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10 | /* BB_AUDIT SUSv3 compliant */
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11 | /* http://www.opengroup.org/onlinepubs/007904975/utilities/cat.html */
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12 |
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13 | #include "libbb.h"
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14 |
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15 | /* This is a NOFORK applet. Be very careful! */
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16 |
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17 |
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18 | int bb_cat(char **argv)
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19 | {
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20 | static const char *const argv_dash[] = { "-", NULL };
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21 |
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22 | int fd;
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23 | int retval = EXIT_SUCCESS;
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24 |
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25 | if (!*argv)
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26 | argv = (char**) &argv_dash;
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27 |
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28 | do {
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29 | fd = STDIN_FILENO;
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30 | if (!LONE_DASH(*argv))
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31 | fd = open_or_warn(*argv, O_RDONLY);
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32 | if (fd >= 0) {
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33 | /* This is not an xfunc - never exits */
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34 | off_t r = bb_copyfd_eof(fd, STDOUT_FILENO);
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35 | if (fd != STDIN_FILENO)
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36 | close(fd);
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37 | if (r >= 0)
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38 | continue;
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39 | }
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40 | retval = EXIT_FAILURE;
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41 | } while (*++argv);
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42 |
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43 | return retval;
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44 | }
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45 |
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46 | int cat_main(int argc, char **argv);
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47 | int cat_main(int argc, char **argv)
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48 | {
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49 | getopt32(argv, "u");
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50 | argv += optind;
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51 | return bb_cat(argv);
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52 | }
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