Mercurial > hg > toybox
view toys/cat.c @ 536:2c1cb0d35031
Add lib/portability.h description with explanation of SWAP() macros.
author | Rob Landley <rob@landley.net> |
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date | Fri, 09 Mar 2012 08:33:57 -0600 |
parents | d1ae502ee190 |
children |
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/* vi: set sw=4 ts=4: * * cat.c - copy inputs to stdout. * * 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. Filename "-" is a synonym for 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 = read(fd, toybuf, size); if (len<0) { perror_msg("%s",name); toys.exitval = EXIT_FAILURE; } if (len<1) break; xwrite(1, toybuf, len); } } void cat_main(void) { loopfiles(toys.optargs, do_cat); }