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-rw-r--r--src/catrw.c43
1 files changed, 43 insertions, 0 deletions
diff --git a/src/catrw.c b/src/catrw.c
new file mode 100644
index 0000000..40d06e3
--- /dev/null
+++ b/src/catrw.c
@@ -0,0 +1,43 @@
+/*
+ * catrw.c -- open a file with O_RDWR and print it.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+
+#define BUFSIZE 4096
+char buf[BUFSIZE];
+
+void catrw(int fd) {
+ int i;
+ for (;;) {
+ while ( (i = read(fd, buf, BUFSIZE)) < 0 && errno == EINTR)
+ ;
+ if (i <= 0)
+ break;
+ write(1, buf, i);
+ }
+}
+
+int main(int argc, char *argv[]) {
+ int fd;
+ if (argc == 1)
+ catrw(0);
+ else {
+ while (--argc && (fd = open(*++argv, O_RDWR))) {
+ catrw(fd);
+ close(fd);
+ }
+ }
+ return 0;
+}
+