/* vi: set sw=4 ts=4: * * cat -v implementation for toybox * * Copyright (C) 2006, 2007 Rob Landley <rob@landley.net> * * Not in SUSv3, but see "Cat -v considered harmful" at * http://cm.bell-labs.com/cm/cs/doc/84/kp.ps.gz USE_CATV(NEWTOY(catv, "vte", TOYFLAG_USR|TOYFLAG_BIN)) 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. */ #include "toys.h" // Callback function for loopfiles() static void do_catv(int fd, char *name) { for(;;) { int i, len; len = read(fd, toybuf, sizeof(toybuf)); if (len < 0) toys.exitval = EXIT_FAILURE; if (len < 1) break; for (i=0; i<len; i++) { char c=toybuf[i]; if (c > 126 && (toys.optflags & 4)) { if (c == 127) { printf("^?"); continue; } else { printf("M-"); c -= 128; } } if (c < 32) { if (c == 10) { if (toys.optflags & 1) xputc('$'); } else if (toys.optflags & (c==9 ? 2 : 4)) { printf("^%c", c+'@'); continue; } } xputc(c); } } } void catv_main(void) { toys.optflags^=4; loopfiles(toys.optargs, do_catv); }