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