mirror of
https://github.com/sheumann/hush.git
synced 2024-11-05 06:07:00 +00:00
8abbee474c
the following of which (from cat.c) belongs in svn history instead of the source code: /* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org) * * This is a new implementation of 'cat' which aims to be SUSv3 compliant. * * Changes from the previous implementation include: * 1) Multiple '-' args are accepted as required by SUSv3. The previous * implementation would close stdin and segfault on a subsequent '-'. * 2) The '-u' options is required by SUSv3. Note that the specified * behavior for '-u' is done by default, so all we need do is accept * the option. */
66 lines
1.3 KiB
C
66 lines
1.3 KiB
C
/* 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;
|
|
}
|