/* vi: set sw=4 ts=4: */ /* * cat -v implementation for toybox * * Copyright (C) 2006 Rob Landley <rob@landley.net> */ /* See "Cat -v considered harmful" at * http://cm.bell-labs.com/cm/cs/doc/84/kp.ps.gz */ #include "toys.h" int catv_main(void) { int retval = 0, fd; char **argv = toys.optargs; toys.optflags^=4; // Loop through files. do { // Read from stdin if there's nothing else to do. fd = 0; if (*argv && 0>(fd = xopen(*argv, O_RDONLY))) retval = EXIT_FAILURE; else for(;;) { int i, res; res = read(fd, toybuf, sizeof(toybuf)); if (res < 0) retval = EXIT_FAILURE; if (res < 1) break; for (i=0; i<res; 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) putchar('$'); } else if (toys.optflags & (c==9 ? 2 : 4)) { printf("^%c", c+'@'); continue; } } putchar(c); } } if (CFG_TOYBOX_FREE && fd) close(fd); } while (*++argv); return retval; }