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/* cat.c - copy inputs to stdout.
*
* Copyright 2006 Rob Landley <rob@landley.net>
*
* See http://opengroup.org/onlinepubs/9699919799/utilities/cat.html
USE_CAT(NEWTOY(cat, "uvte", TOYFLAG_BIN))
config CAT
bool "cat"
default y
help
usage: cat [-etuv] [FILE...]
Copy (concatenate) files to stdout. If no files listed, copy from stdin.
Filename "-" is a synonym for stdin.
-e Mark each newline with $
-t Show tabs as ^I
-u Copy one byte at a time (slow)
-v Display nonprinting characters as escape sequences with M-x for
high ascii characters (>127), and ^x for other nonprinting chars
*/
#define FOR_cat
#define FORCE_FLAGS
#include "toys.h"
static void do_cat(int fd, char *name)
{
int i, len, size = FLAG(u) ? 1 : sizeof(toybuf);
for(;;) {
len = read(fd, toybuf, size);
if (len<0) perror_msg_raw(name);
if (len<1) break;
if (toys.optflags&~FLAG_u) {
for (i = 0; i<len; i++) {
char c = toybuf[i];
if (c>126 && FLAG(v)) {
if (c>127) {
printf("M-");
c -= 128;
}
if (c == 127) {
printf("^?");
continue;
}
}
if (c<32) {
if (c == 10) {
if (FLAG(e)) xputc('$');
} else if (c==9 ? FLAG(t) : FLAG(v)) {
printf("^%c", c+'@');
continue;
}
}
xputc(c);
}
} else xwrite(1, toybuf, len);
}
}
void cat_main(void)
{
loopfiles(toys.optargs, do_cat);
}
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