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| -rw-r--r-- | toys/cat.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/toys/cat.c b/toys/cat.c new file mode 100644 index 00000000..118aa603 --- /dev/null +++ b/toys/cat.c @@ -0,0 +1,38 @@ +/* vi: set sw=4 ts=4: + * + * hello.c - A hello world program. + * + * Copyright 2006 Rob Landley <rob@landley.net> + * + * See http://www.opengroup.org/onlinepubs/009695399/utilities/cat.html + +USE_CAT(NEWTOY(cat, "u", 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. + + -u Copy one byte at a time (slow). +*/ + +#include "toys.h" + +static void do_cat(int fd, char *name) +{ + int len, size=toys.optflags ? 1 : sizeof(toybuf); + + for (;;) { + len = xread(fd, toybuf, size); + if (len<0) toys.exitval = EXIT_FAILURE; + if (len<1) break; + xwrite(1, toybuf, size); + } +} + +void cat_main(void) +{ + loopfiles(toys.optargs, do_cat); +} |