on OSX add missing krb5_net_read() and krb5_net_write() functions.

Found them missing when switching to "-undefined error".


git-svn-id: http://root.cern.ch/svn/root/trunk@40220 27541ba8-7e3a-0410-8455-c3a389f83636

net/krb5auth/src/TKSocket.cxx

@@ -20,6 +20,131 @@ extern int krb5_net_write(/*IN*/ krb5_context context, int fd,
                           const char *buf, int len);
 }
 
+#ifdef __APPLE__
+#define SOCKET int
+#define SOCKET_ERRNO errno
+#define SOCKET_EINTR EINTR
+#define SOCKET_READ(a,b,c) read(a,b,c)
+#define SOCKET_WRITE(a,b,c) write(a,b,c)
+/*
+ * lib/krb5/os/net_read.c
+ *
+ * Copyright 1987, 1988, 1990 by the Massachusetts Institute of Technology.
+ * All Rights Reserved.
+ *
+ * Export of this software from the United States of America may
+ *   require a specific license from the United States Government.
+ *   It is the responsibility of any person or organization contemplating
+ *   export to obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  Furthermore if you modify this software you must label
+ * your software as modified software and not distribute it in such a
+ * fashion that it might be confused with the original M.I.T. software.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ *
+ */
+
+/*
+ * krb5_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 krb5_net_read(krb5_context /*context*/, int fd, register char *buf, register int len)
+{
+   int cc, len2 = 0;
+
+   do {
+      cc = SOCKET_READ((SOCKET)fd, buf, len);
+      if (cc < 0) {
+         if (SOCKET_ERRNO == SOCKET_EINTR)
+            continue;
+
+         /* XXX this interface sucks! */
+	      errno = SOCKET_ERRNO;
+
+         return(cc);          /* errno is already set */
+      } else if (cc == 0) {
+         return(len2);
+      } else {
+         buf += cc;
+         len2 += cc;
+         len -= cc;
+      }
+   } while (len > 0);
+   return(len2);
+}
+/*
+ * lib/krb5/os/net_write.c
+ *
+ * Copyright 1987, 1988, 1990 by the Massachusetts Institute of Technology.
+ * All Rights Reserved.
+ *
+ * Export of this software from the United States of America may
+ *   require a specific license from the United States Government.
+ *   It is the responsibility of any person or organization contemplating
+ *   export to obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  Furthermore if you modify this software you must label
+ * your software as modified software and not distribute it in such a
+ * fashion that it might be confused with the original M.I.T. software.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ *
+ */
+
+/*
+ * krb5_net_write() writes "len" bytes from "buf" to the file
+ * descriptor "fd".  It returns the number of bytes written or
+ * a write() error.  (The calling interface is identical to
+ * write(2).)
+ *
+ * XXX must not use non-blocking I/O
+ */
+
+int krb5_net_write(krb5_context /*context*/, int fd, register const char *buf, int len)
+{
+   int cc;
+   register int wrlen = len;
+   do {
+      cc = SOCKET_WRITE((SOCKET)fd, buf, wrlen);
+      if (cc < 0) {
+         if (SOCKET_ERRNO == SOCKET_EINTR)
+            continue;
+
+         /* XXX this interface sucks! */
+         errno = SOCKET_ERRNO;
+
+         return(cc);
+      } else {
+         buf += cc;
+         wrlen -= cc;
+      }
+   } while (wrlen > 0);
+   return(len);
+}
+#endif
 
 ClassImp(TKSocket)