66 lines
1.3 KiB
C
66 lines
1.3 KiB
C
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/* vi: set sw=4 ts=4: */
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/*
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* cat -v implementation for busybox
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*
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* Copyright (C) 2006 Rob Landley <rob@landley.net>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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/* See "Cat -v considered harmful" at
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* http://cm.bell-labs.com/cm/cs/doc/84/kp.ps.gz */
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#include "busybox.h"
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#include <unistd.h>
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#include <fcntl.h>
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int catv_main(int argc, char **argv)
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{
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int retval = EXIT_SUCCESS, fd, flags;
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flags = bb_getopt_ulflags(argc, argv, "etv");
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flags ^= 4;
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// Loop through files.
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argv += optind;
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do {
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// Read from stdin if there's nothing else to do.
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fd = 0;
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if (*argv && 0>(fd = bb_xopen(*argv, O_RDONLY))) retval = EXIT_FAILURE;
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else for(;;) {
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int i, res;
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res = read(fd, bb_common_bufsiz1, sizeof(bb_common_bufsiz1));
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if (res < 0) retval = EXIT_FAILURE;
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if (res <1) break;
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for (i=0; i<res; i++) {
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char c=bb_common_bufsiz1[i];
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if (c > 126 && (flags & 4)) {
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if (c == 127) {
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printf("^?");
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continue;
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} else {
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printf("M-");
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c -= 128;
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}
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}
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if (c < 32) {
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if (c == 10) {
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if (flags & 1) putchar('$');
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} else if (flags & (c==9 ? 2 : 4)) {
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printf("^%c", c+'@');
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continue;
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}
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}
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putchar(c);
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}
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}
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if (ENABLE_FEATURE_CLEAN_UP && fd) close(fd);
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} while (*++argv);
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return retval;
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}
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