First commit of that cat(1) clone I'm making

1 files changed, 25 insertions, 0 deletions

diff --git a/cfn.c b/cfn.c
new file mode 100644
index 0000000..ad6776e
--- /dev/null
+++ b/cfn.c
@@ -0,0 +1,25 @@
+#include "cat.h"
+
+/* Function opens and writes the contents of a named file to stdout;
+ * effectively a wrapper around cfd() */
+int cfn(const char *fn, void *buf) {
+    int fd;
+
+    /* Open the file to get a read-only file descriptor */
+    if ((fd = open(fn, O_RDONLY)) == -1) {
+        perror(__FUNCTION__);
+        return -1;
+    }
+
+    /* Pass the opened descriptor to cfd() to read it; we keep going even if
+     * there are problems, because we need the descriptor closed even if we
+     * couldn't read it */
+    cfd(fd, buf);
+
+    /* Close the descriptor, since we should now be done with it */
+    if (close(fd) == -1) {
+        perror(__FUNCTION__);
+        return -1;
+    }
+}
+