[RFC PATCH v2 4/4] Add rtc server

[Zhaoming Luo]

---
 rtc/Makefile     | 19 +++++++++++
 rtc/main.c       | 88 ++++++++++++++++++++++++++++++++++++++++++++++++
 rtc/mig-mutate.h |  4 +++
 rtc/pioctl-ops.c | 28 +++++++++++++++
 4 files changed, 139 insertions(+)
 create mode 100644 rtc/Makefile
 create mode 100644 rtc/main.c
 create mode 100644 rtc/mig-mutate.h
 create mode 100644 rtc/pioctl-ops.c

diff --git a/rtc/Makefile b/rtc/Makefile
new file mode 100644
index 00000000..dd0e19d2
--- /dev/null
+++ b/rtc/Makefile
@@ -0,0 +1,19 @@
+dir := rtc
+makemode := server
+
+SRCS = main.c pioctl-ops.c
+MIGSRCS = pioctlServer.c
+
+OBJS = main.o pioctlServer.o pioctl-ops.o
+
+HURDLIBS = trivfs shouldbeinlibc ports
+
+target = rtc
+
+include ../Makeconf
+
+MIGCOMSFLAGS += -prefix rtc_
+mig-sheader-prefix = rtc_
+pioctl-MIGSFLAGS = -imacros $(srcdir)/mig-mutate.h
+
+rtc_pioctl_S.h pioctlServer.c: mig-mutate.h
diff --git a/rtc/main.c b/rtc/main.c
new file mode 100644
index 00000000..114fb497
--- /dev/null
+++ b/rtc/main.c
@@ -0,0 +1,88 @@
+
+#include <version.h>
+
+#include <error.h>
+#include <argp.h>
+#include <nullauth.h>
+#include <hurd/trivfs.h>
+#include <hurd/ports.h>
+#include <hurd/rtc.h>
+
+#include "rtc_pioctl_S.h"
+
+const char *argp_program_version = STANDARD_HURD_VERSION (rtc);
+
+struct trivfs_control *rtccntl;
+
+int trivfs_fstype = FSTYPE_DEV;
+int trivfs_fsid = 0;
+int trivfs_support_read = 0;
+int trivfs_support_write = 0;
+int trivfs_support_exec = 0;
+int trivfs_allow_open = O_READ | O_WRITE;
+
+static const struct argp_option options[] =
+{
+  {0}
+};
+
+/* TODO: adding option */
+static error_t
+parse_opt (int opt, char *arg, struct argp_state *state)
+{
+  return ARGP_ERR_UNKNOWN;
+}
+
+static const struct argp rtc_argp =
+{ options, parse_opt, 0, "RTC device" };
+
+int
+demuxer (mach_msg_header_t *inp, mach_msg_header_t *outp)
+{
+  mig_routine_t routine;
+  if ((routine = rtc_pioctl_server_routine (inp)) ||
+      (routine = NULL, trivfs_demuxer (inp, outp)))
+    {
+      if (routine)
+        (*routine) (inp, outp);
+      return TRUE;
+    }
+  else
+    return FALSE;
+}
+
+int
+main (int argc, char **argv)
+{
+  error_t err;
+  mach_port_t bootstrap;
+
+  argp_parse (&rtc_argp, argc, argv, 0, 0, 0);
+
+  task_get_bootstrap_port (mach_task_self (), &bootstrap);
+  if (bootstrap == MACH_PORT_NULL)
+    error (1, 0, "Must be started as a translator");
+
+  /* Reply to our parent */
+  err = trivfs_startup (bootstrap, 0, 0, 0, 0, 0, &rtccntl);
+  mach_port_deallocate (mach_task_self (), bootstrap);
+  if (err)
+    error (1, err, "trivfs_startup failed");
+
+  /* Launch. */
+  ports_manage_port_operations_multithread (rtccntl->pi.bucket, demuxer,
+                                           30 * 1000, 2 * 60 * 1000, 0);
+
+  return 0;
+}
+
+void
+trivfs_modify_stat (struct trivfs_protid *cred, struct stat *st)
+{
+}
+
+error_t
+trivfs_goaway (struct trivfs_control *fsys, int flags)
+{
+  exit (0);
+}
diff --git a/rtc/mig-mutate.h b/rtc/mig-mutate.h
new file mode 100644
index 00000000..cbf156c7
--- /dev/null
+++ b/rtc/mig-mutate.h
@@ -0,0 +1,4 @@
+#define IO_INTRAN trivfs_protid_t trivfs_begin_using_protid (io_t)
+#define IO_INTRAN_PAYLOAD trivfs_protid_t trivfs_begin_using_protid_payload
+#define IO_DESTRUCTOR trivfs_end_using_protid (trivfs_protid_t)
+#define PIOCTL_IMPORTS import "../libtrivfs/mig-decls.h";
diff --git a/rtc/pioctl-ops.c b/rtc/pioctl-ops.c
new file mode 100644
index 00000000..44038e26
--- /dev/null
+++ b/rtc/pioctl-ops.c
@@ -0,0 +1,28 @@
+/* Server side implementation for rtc device */
+
+/* This implementation is largely based on sys-utils/hwclock from util-linux */
+
+#include "rtc_pioctl_S.h"
+#include <hurd/rtc.h>
+#include <hurd/hurd_types.h>
+
+/* 9 RTC_RD_TIME -- Read RTC time */
+kern_return_t
+rtc_S_pioctl_rtc_rd_time (struct trivfs_protid *cred, struct rtc_time *time)
+{
+  if (!cred) {
+    return EOPNOTSUPP;
+  }
+  if (!(cred->po->openmodes & O_READ))
+    return EBADF;
+  return KERN_SUCCESS;
+}
+
+/* 10 RTC_SET_TIME -- Set RTC time */
+kern_return_t
+rtc_S_pioctl_rtc_set_time (struct trivfs_protid *cred, struct rtc_time time)
+{
+  if (!(cred->po->openmodes & O_WRITE))
+    return EBADF;
+  return KERN_SUCCESS;
+}
-- 
2.47.0