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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
*
* And "Cat -v considered harmful" at
* http://cm.bell-labs.com/cm/cs/doc/84/kp.ps.gz
USE_CAT(NEWTOY(cat, "u"USE_CAT_V("vte"), TOYFLAG_BIN))
USE_CATV(NEWTOY(catv, USE_CATV("vte"), TOYFLAG_USR|TOYFLAG_BIN))
config CAT
bool "cat"
default y
help
usage: cat [-u] [file...]
Copy (concatenate) files to stdout. If no files listed, copy from stdin.
Filename "-" is a synonym for stdin.
-u Copy one byte at a time (slow)
config CAT_V
bool "cat -etv"
default n
depends on CAT
help
usage: cat [-evt]
-e Mark each newline with $
-t Show tabs as ^I
-v Display nonprinting characters as escape sequences with M-x for
high ascii characters (>127), and ^x for other nonprinting chars
config CATV
bool "catv"
default y
help
usage: catv [-evt] [filename...]
Display nonprinting characters as escape sequences. Use M-x for
high ascii characters (>127), and ^x for other nonprinting chars.
-e Mark each newline with $
-t Show tabs as ^I
-v Don't use ^x or M-x escapes
*/
#define FOR_cat
#define FORCE_FLAGS
#include "toys.h"
static void do_cat(int fd, char *name)
{
int i, len, size=(toys.optflags & FLAG_u) ? 1 : sizeof(toybuf);
for(;;) {
len = read(fd, toybuf, size);
if (len < 0) {
toys.exitval = EXIT_FAILURE;
perror_msg_raw(name);
}
if (len < 1) break;
if ((CFG_CAT_V || CFG_CATV) && (toys.optflags&~FLAG_u)) {
for (i=0; i<len; i++) {
char c=toybuf[i];
if (c > 126 && (toys.optflags & FLAG_v)) {
if (c > 127) {
printf("M-");
c -= 128;
}
if (c == 127) {
printf("^?");
continue;
}
}
if (c < 32) {
if (c == 10) {
if (toys.optflags & FLAG_e) xputc('$');
} else if (toys.optflags & (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);
}
void catv_main(void)
{
toys.optflags ^= FLAG_v;
loopfiles(toys.optargs, do_cat);
}
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