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authorRob Landley <rob@landley.net>2008-04-04 12:19:21 -0500
committerRob Landley <rob@landley.net>2008-04-04 12:19:21 -0500
commit52b499c816e77aa4ebb66ab959ccd8aaa0982ccb (patch)
treee211ae8f794ee756d0f232bfef031ada269ac781 /toys/cat.c
parent0a91d9d1db41dd25a4f2d61f3efda7391f00782c (diff)
downloadtoybox-52b499c816e77aa4ebb66ab959ccd8aaa0982ccb.tar.gz
Spent the five minutes to implement "cat".
Diffstat (limited to 'toys/cat.c')
-rw-r--r--toys/cat.c38
1 files changed, 38 insertions, 0 deletions
diff --git a/toys/cat.c b/toys/cat.c
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+/* 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);
+}