Port of most of the OS directory to the PC

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@5079 dc483132-0cff-0310-8789-dd5450dbe970

31 files changed, 139 insertions, 44 deletions

diff --git a/src/lib/krb5/os/ChangeLog b/src/lib/krb5/os/ChangeLog
index c829a5534..69673dcfb 100644
--- a/src/lib/krb5/os/ChangeLog
+++ b/src/lib/krb5/os/ChangeLog
@@ -1,7 +1,8 @@
-Thu Mar 2 18:00:00 1995 Keith Vetter (keithv@fusion.com)
+Tue Mar 7 13:35:21 1995 Keith Vetter (keithv@fusion.com)
 
-	* ustime.c: added another include for the pc for prototyping.
-	* localaddr.c: used the NEED_SOCKETS mechanism for getting winsock.h.
+	* *.c: ported all the c files except an_to_ln, kuserok, and
+          sendto_kdc which have windows stubs.
+        * Makefile.in: reflects above changes.
 
 Wed Mar 1 17:30:00 1995 Keith Vetter (keithv@fusion.com)
 
diff --git a/src/lib/krb5/os/Makefile.in b/src/lib/krb5/os/Makefile.in
index aefffdd3d..1b47e350b 100644
--- a/src/lib/krb5/os/Makefile.in
+++ b/src/lib/krb5/os/Makefile.in
@@ -2,7 +2,7 @@ CFLAGS = $(CCOPTS) $(DEFS)
 LDFLAGS = -g
 
 ##DOSBUILDTOP = ..\..\..
-##DOSLIBNAME=..\libkrb5.lib
+##DOSLIBNAME=..\krb5.lib
 ##DOS!include $(BUILDTOP)\config\windows.in
 
 OBJS= \
@@ -72,3 +72,4 @@ SRCS= \
 	$(srcdir)/write_msg.c
 
 all:: $(OBJS)
+
diff --git a/src/lib/krb5/os/an_to_ln.c b/src/lib/krb5/os/an_to_ln.c
index a96fb4c18..da065b9dd 100644
--- a/src/lib/krb5/os/an_to_ln.c
+++ b/src/lib/krb5/os/an_to_ln.c
@@ -25,7 +25,7 @@
  */
 
 #include "k5-int.h"
-
+#ifndef _MSDOS    /* Not yet for Windows */
 #ifndef min
 #define min(a,b) ((a) > (b) ? (b) : (a))
 #endif /* min */
@@ -168,3 +168,4 @@ username_an_to_ln(context, aname, lnsize, lname)
     }
     return retval;
 }
+#endif
diff --git a/src/lib/krb5/os/ccdefname.c b/src/lib/krb5/os/ccdefname.c
index 3b00b6df5..79314a6b7 100644
--- a/src/lib/krb5/os/ccdefname.c
+++ b/src/lib/krb5/os/ccdefname.c
@@ -27,7 +27,8 @@
 #include "k5-int.h"
 #include <stdio.h>
 
-char *krb5_cc_default_name(context)
+char * INTERFACE
+krb5_cc_default_name(context)
     krb5_context context;
 {
     char *name = getenv(KRB5_ENV_CCNAME);
@@ -37,7 +38,11 @@ char *krb5_cc_default_name(context)
 	if (name_buf == 0)
 	    name_buf = malloc (35);
 	
+#ifdef MSDOS_FILESYSTEM
+        strcpy (name_buf, "FILE:\\krb5cc");
+#else
 	sprintf(name_buf, "FILE:/tmp/krb5cc_%d", getuid());
+#endif
 	name = name_buf;
     }
     return name;
diff --git a/src/lib/krb5/os/def_realm.c b/src/lib/krb5/os/def_realm.c
index f32061ec3..a6f4f993b 100644
--- a/src/lib/krb5/os/def_realm.c
+++ b/src/lib/krb5/os/def_realm.c
@@ -51,7 +51,7 @@ extern char *krb5_override_default_realm;
 
 char *krb5_override_default_realm = 0;
 
-krb5_error_code
+krb5_error_code INTERFACE
 krb5_get_default_realm(context, lrealm)
     krb5_context context;
     char **lrealm;
diff --git a/src/lib/krb5/os/free_hstrl.c b/src/lib/krb5/os/free_hstrl.c
index f112041e4..8314d44f6 100644
--- a/src/lib/krb5/os/free_hstrl.c
+++ b/src/lib/krb5/os/free_hstrl.c
@@ -31,7 +31,7 @@
  Frees the storage taken by a realm list returned by krb5_get_local_realm.
  */
 
-krb5_error_code
+krb5_error_code INTERFACE
 krb5_free_host_realm(context, realmlist)
     krb5_context context;
     char * const *realmlist;
diff --git a/src/lib/krb5/os/free_krbhs.c b/src/lib/krb5/os/free_krbhs.c
index 066acfcbf..8b50a74c7 100644
--- a/src/lib/krb5/os/free_krbhs.c
+++ b/src/lib/krb5/os/free_krbhs.c
@@ -30,7 +30,7 @@
  Frees the storage taken by a host list returned by krb5_get_krbhst.
  */
 
-krb5_error_code
+krb5_error_code INTERFACE
 krb5_free_krbhst(context, hostlist)
     krb5_context context;
     char * const *hostlist;
diff --git a/src/lib/krb5/os/full_ipadr.c b/src/lib/krb5/os/full_ipadr.c
index d5539e454..94d99f276 100644
--- a/src/lib/krb5/os/full_ipadr.c
+++ b/src/lib/krb5/os/full_ipadr.c
@@ -24,14 +24,17 @@
  * Take an IP addr & port and generate a full IP address.
  */
 
+#define NEED_SOCKETS
 #include "k5-int.h"
 
 #ifdef KRB5_USE_INET
 
 #include "os-proto.h"
+#ifndef _WINSOCKAPI_
 #include <netinet/in.h>
+#endif
 
-krb5_error_code
+krb5_error_code INTERFACE
 krb5_make_full_ipaddr(context, adr, port, outaddr)
     krb5_context context;
     krb5_int32 adr;
diff --git a/src/lib/krb5/os/gen_port.c b/src/lib/krb5/os/gen_port.c
index a5eb91bca..3789759aa 100644
--- a/src/lib/krb5/os/gen_port.c
+++ b/src/lib/krb5/os/gen_port.c
@@ -27,7 +27,7 @@
 #include "k5-int.h"
 #include "os-proto.h"
 
-krb5_error_code
+krb5_error_code INTERFACE
 krb5_gen_portaddr(context, addr, ptr, outaddr)
     krb5_context context;
     const krb5_address *addr;
diff --git a/src/lib/krb5/os/gen_rname.c b/src/lib/krb5/os/gen_rname.c
index 59bd7daca..d56bb9160 100644
--- a/src/lib/krb5/os/gen_rname.c
+++ b/src/lib/krb5/os/gen_rname.c
@@ -25,15 +25,18 @@
  * a replay cache tag string.
  */
 
+#define NEED_SOCKETS
 #include "k5-int.h"
 #include "os-proto.h"
 #ifdef KRB5_USE_INET
 #include <sys/types.h>
+#ifndef _WINSOCKAPI_
 #include <netinet/in.h>
 #include <arpa/inet.h>
 #endif
+#endif
 
-krb5_error_code
+krb5_error_code INTERFACE
 krb5_gen_replay_name(context, address, uniq, string)
     krb5_context context;
     const krb5_address *address;
diff --git a/src/lib/krb5/os/get_krbhst.c b/src/lib/krb5/os/get_krbhst.c
index 2445c1bde..eeb785c0a 100644
--- a/src/lib/krb5/os/get_krbhst.c
+++ b/src/lib/krb5/os/get_krbhst.c
@@ -57,7 +57,7 @@
 extern char *krb5_config_file;		/* extern so can be set at
 					   load/runtime */
 
-krb5_error_code
+krb5_error_code INTERFACE
 krb5_get_krbhst(context, realm, hostlist)
     krb5_context context;
     const krb5_data *realm;
@@ -91,7 +91,7 @@ krb5_get_krbhst(context, realm, hostlist)
 		continue;		/* no match */
 
 	    /* +1 to get beyond trailing space */
-	    if (strlen(filebuf) < realm->length + 1) {
+	    if (strlen(filebuf) < (size_t) realm->length + 1) {
 		/* no hostname on config line */
 		retval = KRB5_CONFIG_BADFORMAT;
 		break;
diff --git a/src/lib/krb5/os/gmt_mktime.c b/src/lib/krb5/os/gmt_mktime.c
index 18973e138..fac8e65f3 100644
--- a/src/lib/krb5/os/gmt_mktime.c
+++ b/src/lib/krb5/os/gmt_mktime.c
@@ -38,7 +38,7 @@ time_t gmt_mktime(t)
 {
   time_t accum;
 
-#define assert_time(cnd) if(!(cnd)) return -1
+#define assert_time(cnd) if(!(cnd)) return (time_t) -1
 
   assert_time(t->tm_year>=70);
   assert_time(t->tm_year<=138);
diff --git a/src/lib/krb5/os/hst_realm.c b/src/lib/krb5/os/hst_realm.c
index 1cbe9aead..00c46ca93 100644
--- a/src/lib/krb5/os/hst_realm.c
+++ b/src/lib/krb5/os/hst_realm.c
@@ -62,9 +62,15 @@
  * host names should be in the usual form (e.g. FOO.BAR.BAZ)
  */
 
+#define NEED_SOCKETS
 #include "k5-int.h"
 #include <ctype.h>
 #include <stdio.h>
+#ifdef USE_STRING_H
+#include <string.h>
+#else
+#include <strings.h>
+#endif
 
 /* for old Unixes and friends ... */
 #ifndef MAXHOSTNAMELEN
@@ -75,7 +81,7 @@
 
 extern char *krb5_trans_file;
 
-krb5_error_code
+krb5_error_code INTERFACE
 krb5_get_host_realm(context, host, realmsp)
     krb5_context context;
     const char *host;
diff --git a/src/lib/krb5/os/init_os_ctx.c b/src/lib/krb5/os/init_os_ctx.c
index 4c92c6775..3f9599aad 100644
--- a/src/lib/krb5/os/init_os_ctx.c
+++ b/src/lib/krb5/os/init_os_ctx.c
@@ -25,7 +25,7 @@
 
 #include "k5-int.h"
 
-krb5_error_code
+krb5_error_code INTERFACE
 krb5_os_init_context(ctx)
 	krb5_context ctx;
 {
@@ -45,7 +45,7 @@ krb5_os_init_context(ctx)
 	return 0;
 }
 
-void
+void INTERFACE
 krb5_os_free_context(ctx)
 	krb5_context	ctx;
 {
diff --git a/src/lib/krb5/os/krbfileio.c b/src/lib/krb5/os/krbfileio.c
index 44521dd9b..1a54ddd7f 100644
--- a/src/lib/krb5/os/krbfileio.c
+++ b/src/lib/krb5/os/krbfileio.c
@@ -33,18 +33,26 @@
 static char *VersionID = "@(#)krbfileio.c	2 - 08/22/91";
 #endif
 
+#define NEED_LOWLEVEL_IO                        /* Need open(), etc. */
+
 #include "k5-int.h"
+#ifdef HAVE_SYS_FILE_H
 #include <sys/file.h>
+#endif
 #include <sys/types.h>
 #ifdef NEED_SYS_FCNTL_H
 #include <sys/fcntl.h>
 #endif
 
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+
 #ifdef apollo
 #   define OPEN_MODE_NOT_TRUSTWORTHY
 #endif
 
-krb5_error_code
+krb5_error_code INTERFACE
 krb5_create_secure_file(context, pathname)
     krb5_context context;
     const char * pathname;
@@ -54,7 +62,7 @@ krb5_create_secure_file(context, pathname)
     /*
      * Create the file with access restricted to the owner
      */
-    fd = open(pathname, O_RDWR | O_CREAT | O_EXCL, 0600);
+    fd = open(pathname, O_RDWR | O_CREAT | O_EXCL | O_BINARY, 0600);
 
 #ifdef OPEN_MODE_NOT_TRUSTWORTHY
     /*
@@ -83,15 +91,17 @@ krb5_create_secure_file(context, pathname)
     }
 }
 
-krb5_error_code
+krb5_error_code INTERFACE
 krb5_sync_disk_file(context, fp)
     krb5_context context;
     FILE *fp;
 {
     fflush(fp);
+#ifndef MSDOS_FILESYSTEM
     if (fsync(fileno(fp))) {
         return errno;
     }
+#endif
 
     return 0;
 }
diff --git a/src/lib/krb5/os/ktdefname.c b/src/lib/krb5/os/ktdefname.c
index 2e944d0e2..3e9e13d5f 100644
--- a/src/lib/krb5/os/ktdefname.c
+++ b/src/lib/krb5/os/ktdefname.c
@@ -28,14 +28,14 @@
 
 extern char *krb5_defkeyname;
 
-krb5_error_code
+krb5_error_code INTERFACE
 krb5_kt_default_name(context, name, namesize)
     krb5_context context;
     char *name;
     int namesize;
 {
     strncpy(name, krb5_defkeyname, namesize);
-    if (namesize < strlen(krb5_defkeyname))
+    if ((size_t) namesize < strlen(krb5_defkeyname))
 	return KRB5_CONFIG_NOTENUFSPACE;
     else
 	return 0;
diff --git a/src/lib/krb5/os/kuserok.c b/src/lib/krb5/os/kuserok.c
index 900f8c0be..cefb3ce9a 100644
--- a/src/lib/krb5/os/kuserok.c
+++ b/src/lib/krb5/os/kuserok.c
@@ -25,6 +25,7 @@
  */
 
 #include "k5-int.h"
+#ifndef _MSDOS    /* Not yet for Windows */
 #include <stdio.h>
 #include <pwd.h>
 
@@ -135,3 +136,4 @@ krb5_kuserok(context, principal, luser)
     fclose(fp);
     return(isok);
 }
+#endif
diff --git a/src/lib/krb5/os/locate_kdc.c b/src/lib/krb5/os/locate_kdc.c
index 99e6fdcfe..4c2d2e94a 100644
--- a/src/lib/krb5/os/locate_kdc.c
+++ b/src/lib/krb5/os/locate_kdc.c
@@ -24,14 +24,19 @@
  * get socket addresses for KDC.
  */
 
+#define NEED_SOCKETS
 #include "k5-int.h"
 #include <stdio.h>
 #include <sys/types.h>
+#ifndef _WINSOCKAPI_
 #include <sys/socket.h>
 #ifdef KRB5_USE_INET
 #include <netinet/in.h>
 #endif
+#endif
+#ifndef _WINSOCKAPI_
 #include <netdb.h>
+#endif
 #include "os-proto.h"
 
 #ifdef KRB5_USE_INET
@@ -43,7 +48,7 @@ extern char *krb5_kdc_sec_udp_portname;
  * returns count of number of addresses found
  */
 
-krb5_error_code
+krb5_error_code INTERFACE
 krb5_locate_kdc(context, realm, addr_pp, naddrs)
     krb5_context context;
     const krb5_data *realm;
@@ -51,7 +56,7 @@ krb5_locate_kdc(context, realm, addr_pp, naddrs)
     int *naddrs;
 {
     char **hostlist;
-    int code;
+    krb5_error_code code;
     int i, j, out, count;
     struct sockaddr *addr_p;
     struct sockaddr_in *sin_p;
diff --git a/src/lib/krb5/os/lock_file.c b/src/lib/krb5/os/lock_file.c
index 86368d80e..95b086ce6 100644
--- a/src/lib/krb5/os/lock_file.c
+++ b/src/lib/krb5/os/lock_file.c
@@ -24,6 +24,7 @@
  * libos: krb5_lock_file routine
  */
 
+#ifndef _MSDOS
 #if HAVE_UNISTD_H
 #include <unistd.h>
 #endif
@@ -103,3 +104,17 @@ krb5_lock_file(context, filep, pathname, mode)
 #endif
     return 0;
 }
+#else   /* MSDOS */
+
+#include "k5-int.h"
+
+krb5_error_code INTERFACE
+krb5_lock_file(context, filep, pathname, mode)
+    krb5_context context;
+    FILE *filep;
+    char *pathname;
+    int mode;
+{
+    return 0;
+}
+#endif
diff --git a/src/lib/krb5/os/net_read.c b/src/lib/krb5/os/net_read.c
index caa85ff78..9b28896d9 100644
--- a/src/lib/krb5/os/net_read.c
+++ b/src/lib/krb5/os/net_read.c
@@ -22,6 +22,7 @@
  * 
  */
 
+#define NEED_LOWLEVEL_IO
 #include "k5-int.h"
 
 /*
@@ -34,7 +35,7 @@
  * XXX must not use non-blocking I/O
  */
 
-int
+int INTERFACE
 krb5_net_read(context, fd, buf, len)
     krb5_context context;
     int fd;
diff --git a/src/lib/krb5/os/net_write.c b/src/lib/krb5/os/net_write.c
index 9cf3bb5e7..4885a8172 100644
--- a/src/lib/krb5/os/net_write.c
+++ b/src/lib/krb5/os/net_write.c
@@ -22,6 +22,7 @@
  * 
  */
 
+#define NEED_LOWLEVEL_IO
 #include "k5-int.h"
 
 /*
@@ -33,7 +34,7 @@
  * XXX must not use non-blocking I/O
  */
 
-int
+int INTERFACE
 krb5_net_write(context, fd, buf, len)
     krb5_context context;
     int fd;
diff --git a/src/lib/krb5/os/os-proto.h b/src/lib/krb5/os/os-proto.h
index f23bb6646..e5f982673 100644
--- a/src/lib/krb5/os/os-proto.h
+++ b/src/lib/krb5/os/os-proto.h
@@ -28,7 +28,7 @@
 #define KRB5_LIBOS_INT_PROTO__
 
 #ifdef SOCK_DGRAM			/* XXX hack... */
-krb5_error_code krb5_locate_kdc
+krb5_error_code INTERFACE krb5_locate_kdc
     PROTOTYPE((krb5_context,
 	       const krb5_data *,
 	       struct sockaddr **,
@@ -36,20 +36,20 @@ krb5_error_code krb5_locate_kdc
 #endif
 
 #ifdef KRB5_USE_INET
-krb5_error_code krb5_unpack_full_ipaddr
+krb5_error_code INTERFACE krb5_unpack_full_ipaddr
     PROTOTYPE((krb5_context,
 	       const krb5_address *,
 	       krb5_int32 *,
 	       krb5_int16 *));
 
 #ifdef NARROW_PROTOTYPES
-krb5_error_code krb5_make_full_ipaddr
+krb5_error_code INTERFACE krb5_make_full_ipaddr
     PROTOTYPE((krb5_context,
 	       krb5_int32,
 	       krb5_int16,
 	       krb5_address **));
 #else
-krb5_error_code krb5_make_full_ipaddr
+krb5_error_code INTERFACE krb5_make_full_ipaddr
     PROTOTYPE((krb5_context,
 	       krb5_int32,
 	       int,			/* unsigned short promotes to signed
diff --git a/src/lib/krb5/os/port2ip.c b/src/lib/krb5/os/port2ip.c
index b6883d782..d8c5b23c1 100644
--- a/src/lib/krb5/os/port2ip.c
+++ b/src/lib/krb5/os/port2ip.c
@@ -24,13 +24,16 @@
  * Take an ADDRPORT address and split into IP addr & port.
  */
 
+#define NEED_SOCKETS
 #include "k5-int.h"
 
 #ifdef KRB5_USE_INET
 #include "os-proto.h"
+#ifndef _WINSOCKAPI_
 #include <netinet/in.h>
+#endif
 
-krb5_error_code
+krb5_error_code INTERFACE
 krb5_unpack_full_ipaddr(context, inaddr, adr, port)
     krb5_context context;
     const krb5_address *inaddr;
@@ -41,7 +44,7 @@ krb5_unpack_full_ipaddr(context, inaddr, adr, port)
     unsigned short smushport;
     register krb5_octet *marshal;
     krb5_addrtype temptype;
-    krb5_int32 templength;
+    krb5_ui_4 templength;
 
     if (inaddr->addrtype != ADDRTYPE_ADDRPORT)
 	return KRB5_PROG_ATYPE_NOSUPP;
diff --git a/src/lib/krb5/os/read_msg.c b/src/lib/krb5/os/read_msg.c
index 2d49249dc..749dae088 100644
--- a/src/lib/krb5/os/read_msg.c
+++ b/src/lib/krb5/os/read_msg.c
@@ -24,31 +24,40 @@
  * Write a message to the network
  */
 
+#define NEED_SOCKETS
 #include "k5-int.h"
 #include <errno.h>
+#ifndef _WINSOCKAPI_
 #include <netinet/in.h>
+#endif
 
-krb5_error_code
+krb5_error_code INTERFACE
 krb5_read_message(context, fdp, inbuf)
     krb5_context context;
 	krb5_pointer fdp;
 	krb5_data	*inbuf;
 {
-	krb5_int32	len, len2;
+	krb5_int32	len;
+   int      len2, ilen;
 	char		*buf = NULL;
 	int		fd = *( (int *) fdp);
 	
 	if ((len2 = krb5_net_read(context, fd, (char *)&len, 4)) != 4)
 		return((len2 < 0) ? errno : ECONNABORTED);
-	inbuf->length = len = ntohl(len);
-	if (len) {
+	len = ntohl(len);
+
+   if ((len & VALID_UINT_BITS) != len)  /* Overflow size_t??? */
+      return ENOMEM;
+
+	inbuf->length = ilen = (int) len;
+	if (ilen) {
 		/*
 		 * We may want to include a sanity check here someday....
 		 */
-		if (!(buf = malloc(len))) {
+		if (!(buf = malloc(ilen))) {
 			return(ENOMEM);
 		}
-		if ((len2 = krb5_net_read(context, fd, buf, len)) != len) {
+		if ((len2 = krb5_net_read(context, fd, buf, ilen)) != ilen) {
 			krb5_xfree(buf);
 			return((len2 < 0) ? errno : ECONNABORTED);
 		}
diff --git a/src/lib/krb5/os/read_pwd.c b/src/lib/krb5/os/read_pwd.c
index 3ca73fbbe..1c07c9c40 100644
--- a/src/lib/krb5/os/read_pwd.c
+++ b/src/lib/krb5/os/read_pwd.c
@@ -25,6 +25,7 @@
  */
 
 #include "k5-int.h"
+#ifndef _MSDOS
 #include <stdio.h>
 #include <errno.h>
 #include <signal.h>
@@ -238,3 +239,19 @@ krb5_read_password(context, prompt, prompt2, return_pwd, size_return)
 
     return 0;
 }
+#else /* MSDOS */
+/* Don't expect to be called, just define it for sanity and the linker.
+*/
+
+krb5_error_code INTERFACE
+krb5_read_password(context, prompt, prompt2, return_pwd, size_return)
+    krb5_context context;
+    char *prompt;
+    char *prompt2;
+    char *return_pwd;
+    int *size_return;
+{
+   *size_return = 0;
+   return 0;
+}
+#endif   /* !MSDOS */
diff --git a/src/lib/krb5/os/realm_dom.c b/src/lib/krb5/os/realm_dom.c
index dd146825a..4550bfbca 100644
--- a/src/lib/krb5/os/realm_dom.c
+++ b/src/lib/krb5/os/realm_dom.c
@@ -51,7 +51,7 @@
 
 extern char *krb5_trans_file;
 
-krb5_error_code
+krb5_error_code INTERFACE
 krb5_get_realm_domain(context, realm, domain)
     krb5_context context;
     const char *realm;
diff --git a/src/lib/krb5/os/sendto_kdc.c b/src/lib/krb5/os/sendto_kdc.c
index 24022ad6b..5b66acae4 100644
--- a/src/lib/krb5/os/sendto_kdc.c
+++ b/src/lib/krb5/os/sendto_kdc.c
@@ -26,6 +26,7 @@
  */
 
 #include "k5-int.h"
+#ifndef _MSDOS    /* Not yet for Windows */
 
 #include <sys/types.h>
 #include <sys/socket.h>
@@ -205,3 +206,4 @@ krb5_sendto_kdc (context, message, realm, reply)
     }
     return retval;
 }
+#endif
diff --git a/src/lib/krb5/os/sn2princ.c b/src/lib/krb5/os/sn2princ.c
index 97509717b..1ee37d3f9 100644
--- a/src/lib/krb5/os/sn2princ.c
+++ b/src/lib/krb5/os/sn2princ.c
@@ -25,12 +25,17 @@
  * form.
  */
 
+#define NEED_SOCKETS
 #include "k5-int.h"
+#ifndef _WINSOCKAPI_
 #include <netdb.h>
+#endif
 #include <ctype.h>
+#ifdef HAVE_SYS_PARAM_H
 #include <sys/param.h>
+#endif
 
-krb5_error_code
+krb5_error_code INTERFACE
 krb5_sname_to_principal(context, hostname, sname, type, ret_princ)
     krb5_context context;
     const char * hostname;
diff --git a/src/lib/krb5/os/timeofday.c b/src/lib/krb5/os/timeofday.c
index 5197809d3..82636efa6 100644
--- a/src/lib/krb5/os/timeofday.c
+++ b/src/lib/krb5/os/timeofday.c
@@ -36,9 +36,11 @@
 #define timetype long
 #endif
 
+#ifndef HAVE_ERRNO
 extern int errno;
+#endif
 
-krb5_error_code
+krb5_error_code INTERFACE
 krb5_timeofday(context, timeret)
     krb5_context context;
     register krb5_int32 *timeret;
diff --git a/src/lib/krb5/os/unlck_file.c b/src/lib/krb5/os/unlck_file.c
index 900073e09..3e0b3b32b 100644
--- a/src/lib/krb5/os/unlck_file.c
+++ b/src/lib/krb5/os/unlck_file.c
@@ -27,7 +27,7 @@
 #include <stdio.h>
 #include "k5-int.h"
 
-krb5_error_code
+krb5_error_code INTERFACE
 krb5_unlock_file(context, filep, pathname)
     krb5_context context;
     FILE *filep;
diff --git a/src/lib/krb5/os/write_msg.c b/src/lib/krb5/os/write_msg.c
index e9f615412..659b79bbe 100644
--- a/src/lib/krb5/os/write_msg.c
+++ b/src/lib/krb5/os/write_msg.c
@@ -24,11 +24,14 @@
  * convenience sendauth/recvauth functions
  */
 
+#define NEED_SOCKETS
 #include "k5-int.h"
 #include <errno.h>
+#ifndef _WINSOCKAPI_
 #include <netinet/in.h>
+#endif
 
-krb5_error_code
+krb5_error_code INTERFACE
 krb5_write_message(context, fdp, outbuf)
     krb5_context context;
 	krb5_pointer	fdp;