BSD 4_4 development

Work on file usr/src/kerberosIV/krb/netread.c

Synthesized-from: CSRG/cd3/4.4

diff --git a/usr/src/kerberosIV/krb/netread.c b/usr/src/kerberosIV/krb/netread.c
new file mode 100644 (file)
index 0000000..9018690
--- /dev/null
+++ b/usr/src/kerberosIV/krb/netread.c
@@ -0,0 +1,49 @@
+/*
+ * $Source: /mit/kerberos/src/lib/krb/RCS/netread.c,v $
+ * $Author: jtkohl $
+ *
+ * Copyright 1987, 1988 by the Massachusetts Institute of Technology.
+ *
+ * For copying and distribution information, please see the file
+ * <mit-copyright.h>.
+ */
+
+#ifndef        lint
+static char rcsid_netread_c[] =
+"$Header: netread.c,v 4.1 88/11/15 16:47:21 jtkohl Exp $";
+#endif lint
+
+#include <mit-copyright.h>
+
+/*
+ * krb_net_read() reads from the file descriptor "fd" to the buffer
+ * "buf", until either 1) "len" bytes have been read or 2) cannot
+ * read anymore from "fd".  It returns the number of bytes read
+ * or a read() error.  (The calling interface is identical to
+ * read(2).)
+ *
+ * XXX must not use non-blocking I/O
+ */
+
+int
+krb_net_read(fd, buf, len)
+int fd;
+register char *buf;
+register int len;
+{
+    int cc, len2 = 0;
+
+    do {
+       cc = read(fd, buf, len);
+       if (cc < 0)
+           return(cc);          /* errno is already set */
+       else if (cc == 0) {
+           return(len2);
+       } else {
+           buf += cc;
+           len2 += cc;
+           len -= cc;
+       }
+    } while (len > 0);
+    return(len2);
+}