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[821] | 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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[1765] | 7 | * Licensed under GPLv2, see file License in this tarball for details.
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[821] | 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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[1765] | 13 | #include "libbb.h"
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[821] | 14 |
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[1765] | 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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[821] | 19 | {
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[1765] | 20 | static const char *const argv_dash[] = { "-", NULL };
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| 21 |
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| 22 | int fd;
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[821] | 23 | int retval = EXIT_SUCCESS;
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| 24 |
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[1765] | 25 | if (!*argv)
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| 26 | argv = (char**) &argv_dash;
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[821] | 27 |
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| 28 | do {
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[1765] | 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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[821] | 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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[1765] | 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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