--- /dev/null
+/* $Cambridge: exim/src/OS/os.h-SunOS4,v 1.1 2004/10/06 15:07:39 ph10 Exp $ */
+
+/* Exim: OS-specific C header file for SunOS4 */
+
+#define LOAD_AVG_NEEDS_ROOT
+#define HAVE_DEV_KMEM
+#define LOAD_AVG_TYPE long
+#define LOAD_AVG_SYMBOL "_avenrun"
+#define KERNEL_PATH "/vmunix"
+
+#define HAVE_MMAP
+#define HAVE_SYS_VFS_H
+
+#define F_FREESP O_TRUNC
+#define EXIT_FAILURE 1
+#define EXIT_SUCCESS 0
+typedef struct flock flock_t;
+
+#define STRERROR_FROM_ERRLIST
+#define memmove(a, b, c) bcopy(b, a, c)
+#define strtoul(str, ptr, base) ((unsigned int)strtol((str),(ptr),(base)))
+
+extern char *strerror(int);
+extern int sys_nerr;
+extern char *sys_errlist[];
+
+/* In ANSI C strtod() is defined in stdlib.h, but in SunOS4 it is defined in
+floatingpoint.h which is called from math.h, which Exim doesn't include. */
+
+extern double strtod(const char *, char **);
+
+/* SunOS4 seems to define getc, ungetc, feof and ferror as macros only, not
+as functions. We need to have them as assignable functions. Setting this
+flag causes this to get done in exim.h. */
+
+#define FUDGE_GETC_AND_FRIENDS
+
+/* End */