diff options
Diffstat (limited to 'toys')
| -rw-r--r-- | toys/Config.in | 13 | ||||
| -rw-r--r-- | toys/catv.c | 60 | ||||
| -rw-r--r-- | toys/toylist.h | 1 |
3 files changed, 74 insertions, 0 deletions
diff --git a/toys/Config.in b/toys/Config.in index 59271ddb..3828ab50 100644 --- a/toys/Config.in +++ b/toys/Config.in @@ -1,5 +1,18 @@ menu "Toys" +config CATV + bool "catv" + default n + 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. + config DF bool "df (disk free)" default n diff --git a/toys/catv.c b/toys/catv.c new file mode 100644 index 00000000..3a36de6b --- /dev/null +++ b/toys/catv.c @@ -0,0 +1,60 @@ +/* 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, 0))) retval = EXIT_FAILURE; + else for(;;) { + int i, res; + + res = reread(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_TOYS_FREE && fd) close(fd); + } while (*++argv); + + return retval; +} diff --git a/toys/toylist.h b/toys/toylist.h index ef427491..6c5059f1 100644 --- a/toys/toylist.h +++ b/toys/toylist.h @@ -53,6 +53,7 @@ NEWTOY(toybox, NULL, 0) // The rest of these are alphabetical, for binary search. +USE_CATV(NEWTOY(catv, "vte", TOYFLAG_NOFORK|TOYFLAG_USR|TOYFLAG_BIN)) USE_TOYSH(NEWTOY(cd, NULL, TOYFLAG_NOFORK)) USE_DF(NEWTOY(df, "Pkt*a", TOYFLAG_USR|TOYFLAG_SBIN)) USE_TOYSH(NEWTOY(exit, NULL, TOYFLAG_NOFORK)) |