3946 ::gcore
Reviewed by: Adam Leventhal <ahl@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>

@@ -21,13 +21,14 @@
  */
 /*
  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
+/*
+ * Copyright (c) 2013 by Delphix. All rights reserved.
+ */
 
-#pragma ident   "%Z%%M% %I%     %E% SMI"
-
 #include <limits.h>
 #include <string.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <errno.h>

@@ -147,6 +148,99 @@
 /*PRINTFLIKE2*/
 void
 Perror_printf(struct ps_prochandle *P, const char *format, ...)
 {
         /* nothing to do here */
+}
+
+/*
+ * Default operations.
+ */
+static ssize_t
+Pdefault_ssizet()
+{
+        return (-1);
+}
+
+static int
+Pdefault_int()
+{
+        return (-1);
+}
+
+static void
+Pdefault_void()
+{
+}
+
+static void *
+Pdefault_voidp()
+{
+        return (NULL);
+}
+
+static const ps_ops_t P_default_ops = {
+        .pop_pread      = (pop_pread_t)Pdefault_ssizet,
+        .pop_pwrite     = (pop_pwrite_t)Pdefault_ssizet,
+        .pop_read_maps  = (pop_read_maps_t)Pdefault_int,
+        .pop_read_aux   = (pop_read_aux_t)Pdefault_void,
+        .pop_cred       = (pop_cred_t)Pdefault_int,
+        .pop_priv       = (pop_priv_t)Pdefault_int,
+        .pop_psinfo     = (pop_psinfo_t)Pdefault_voidp,
+        .pop_status     = (pop_status_t)Pdefault_void,
+        .pop_lstatus    = (pop_lstatus_t)Pdefault_voidp,
+        .pop_lpsinfo    = (pop_lpsinfo_t)Pdefault_voidp,
+        .pop_fini       = (pop_fini_t)Pdefault_void,
+        .pop_platform   = (pop_platform_t)Pdefault_voidp,
+        .pop_uname      = (pop_uname_t)Pdefault_int,
+        .pop_zonename   = (pop_zonename_t)Pdefault_voidp,
+        .pop_execname   = (pop_execname_t)Pdefault_voidp,
+#if defined(__i386) || defined(__amd64)
+        .pop_ldt        = (pop_ldt_t)Pdefault_int
+#endif
+};
+
+/*
+ * Initialize the destination ops vector with functions from the source.
+ * Functions which are NULL in the source ops vector are set to corresponding
+ * default function in the destination vector.
+ */
+void
+Pinit_ops(ps_ops_t *dst, const ps_ops_t *src)
+{
+        *dst = P_default_ops;
+
+        if (src->pop_pread != NULL)
+                dst->pop_pread = src->pop_pread;
+        if (src->pop_pwrite != NULL)
+                dst->pop_pwrite = src->pop_pwrite;
+        if (src->pop_read_maps != NULL)
+                dst->pop_read_maps = src->pop_read_maps;
+        if (src->pop_read_aux != NULL)
+                dst->pop_read_aux = src->pop_read_aux;
+        if (src->pop_cred != NULL)
+                dst->pop_cred = src->pop_cred;
+        if (src->pop_priv != NULL)
+                dst->pop_priv = src->pop_priv;
+        if (src->pop_psinfo != NULL)
+                dst->pop_psinfo = src->pop_psinfo;
+        if (src->pop_status != NULL)
+                dst->pop_status = src->pop_status;
+        if (src->pop_lstatus != NULL)
+                dst->pop_lstatus = src->pop_lstatus;
+        if (src->pop_lpsinfo != NULL)
+                dst->pop_lpsinfo = src->pop_lpsinfo;
+        if (src->pop_fini != NULL)
+                dst->pop_fini = src->pop_fini;
+        if (src->pop_platform != NULL)
+                dst->pop_platform = src->pop_platform;
+        if (src->pop_uname != NULL)
+                dst->pop_uname = src->pop_uname;
+        if (src->pop_zonename != NULL)
+                dst->pop_zonename = src->pop_zonename;
+        if (src->pop_execname != NULL)
+                dst->pop_execname = src->pop_execname;
+#if defined(__i386) || defined(__amd64)
+        if (src->pop_ldt != NULL)
+                dst->pop_ldt = src->pop_ldt;
+#endif
 }