diff --git a/std/datetime/systime.d b/std/datetime/systime.d
index e9f07b5f7..70dc24de6 100644
--- a/std/datetime/systime.d
+++ b/std/datetime/systime.d
@@ -322,6 +322,25 @@ public:
                            hnsecsToUnixEpoch;
                 }
             }
+            else version (OpenBSD)
+            {
+                static if (clockType == ClockType.second)
+                    return unixTimeToStdTime(core.stdc.time.time(null));
+                else
+                {
+                    import core.sys.openbsd.time : clock_gettime, CLOCK_REALTIME;
+                    static if (clockType == ClockType.coarse)       alias clockArg = CLOCK_REALTIME;
+                    else static if (clockType == ClockType.normal)  alias clockArg = CLOCK_REALTIME;
+                    else static if (clockType == ClockType.precise) alias clockArg = CLOCK_REALTIME;
+                    else static assert(0, "Previous static if is wrong.");
+                    timespec ts;
+                    if (clock_gettime(clockArg, &ts) != 0)
+                        throw new TimeException("Call to clock_gettime() failed");
+                    return convert!("seconds", "hnsecs")(ts.tv_sec) +
+                           ts.tv_nsec / 100 +
+                           hnsecsToUnixEpoch;
+                }
+            }
             else version (DragonFlyBSD)
             {
                 import core.sys.dragonflybsd.time : clock_gettime, CLOCK_REALTIME,
diff --git a/std/file.d b/std/file.d
index a744916e2..f6afd5243 100644
--- a/std/file.d
+++ b/std/file.d
@@ -3590,6 +3590,44 @@ else version (DragonFlyBSD)
 
         return buffer.assumeUnique;
     }
+    else version (OpenBSD)
+    {
+        import core.sys.openbsd.sys.sysctl : sysctl, CTL_KERN, KERN_PROC_ARGS, KERN_PROC_ARGV;
+        import core.sys.posix.unistd : getpid;
+        import std.conv : to;
+        import std.exception : enforce, errnoEnforce;
+        import std.process : searchPathFor;
+
+        int[4] mib = [CTL_KERN, KERN_PROC_ARGS, getpid(), KERN_PROC_ARGV];
+        size_t len;
+
+        auto result = sysctl(mib.ptr, mib.length, null, &len, null, 0);
+        errnoEnforce(result == 0);
+
+        auto argv = new char*[len - 1];
+        result = sysctl(mib.ptr, mib.length, argv.ptr, &len, null, 0);
+        errnoEnforce(result == 0);
+
+        auto argv0 = argv[0];
+        if (*argv0 == '/' || *argv0 == '.')
+        {
+            import core.sys.posix.stdlib : realpath;
+            auto absolutePath = realpath(argv0, null);
+            scope (exit)
+            {
+                if (absolutePath)
+                    free(absolutePath);
+            }
+            errnoEnforce(absolutePath);
+            return to!(string)(absolutePath);
+        }
+        else
+        {
+            auto absolutePath = searchPathFor(to!string(argv0));
+            errnoEnforce(absolutePath);
+            return absolutePath;
+        }
+    }
     else version (Solaris)
     {
         import core.sys.posix.unistd : getpid;
diff --git a/std/parallelism.d b/std/parallelism.d
index 713a28680..9f1a32126 100644
--- a/std/parallelism.d
+++ b/std/parallelism.d
@@ -994,6 +994,11 @@ uint totalCPUsImpl() @nogc nothrow @trusted
         import core.sys.posix.unistd : _SC_NPROCESSORS_ONLN, sysconf;
         return cast(uint) sysconf(_SC_NPROCESSORS_ONLN);
     }
+    else version (OpenBSD)
+    {
+        import core.sys.posix.unistd : _SC_NPROCESSORS_ONLN, sysconf;
+        return cast(uint) sysconf(_SC_NPROCESSORS_ONLN);
+    }
     else version (useSysctlbyname)
     {
         version (Darwin)
diff --git a/std/process.d b/std/process.d
index 877c7876c..551d5d7c5 100644
--- a/std/process.d
+++ b/std/process.d
@@ -1428,7 +1428,7 @@ version (Windows) @system unittest
 // Searches the PATH variable for the given executable file,
 // (checking that it is in fact executable).
 version (Posix)
-private string searchPathFor(scope const(char)[] executable)
+package(std) string searchPathFor(scope const(char)[] executable)
     @safe
 {
     import std.algorithm.iteration : splitter;
diff --git a/std/stdio.d b/std/stdio.d
index af63c5f7a..4d1674cf4 100644
--- a/std/stdio.d
+++ b/std/stdio.d
@@ -79,6 +79,10 @@ else version (NetBSD)
 {
     version = GENERIC_IO;
 }
+else version (OpenBSD)
+{
+    version = GENERIC_IO;
+}
 else version (DragonFlyBSD)
 {
     version = GENERIC_IO;