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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] [FILE...]
- 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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