apps/system/zoneinfo: Add logic to build a ROMFS file system containing the timezone data

examples/romfs/Kconfig

@@ -6,6 +6,7 @@
 config EXAMPLES_ROMFS
 	bool "ROMFS example"
 	default n
+	depends on FS_ROMFS
 	---help---
 		Enable the ROMFS example
 

examples/romfs/romfs_main.c

@@ -74,7 +74,7 @@
 #include "romfs_testdir.h"
 
 /****************************************************************************
- * Definitions
+ * Pre-processor Definitions
  ****************************************************************************/
 
 /* Configuration settings */

include/zoneinfo.h

@@ -0,0 +1,83 @@
+/****************************************************************************
+ * apps/include/zoneinfo.h
+ *
+ *   Copyright (C) 2015 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#ifndef __APPS_INCLUDE_ZONEINFO_H
+#define __APPS_INCLUDE_ZONEINFO_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#ifdef CONFIG_SYSTEM_ZONEINFO_ROMFS
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+#ifdef __cplusplus
+#define EXTERN extern "C"
+extern "C"
+{
+#else
+#define EXTERN extern
+#endif
+
+/* If the TZ database is built as a ROMFS file system, then these variables
+ * provide (1) the address of the array in FLASH/ROM that contains the 
+ * ROMFS file system image, and (2) the size of the ROMFS file system image
+ * in bytes.  This is sufficient information to permit external logic to
+ * mount the ROMF file system.
+ */
+
+EXTERN unsigned char romfs_zoneinfo_img[];
+EXTERN unsigned int  romfs_zoneinfo_img_len;
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+#undef EXTERN
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* CONFIG_SYSTEM_ZONEINFO_ROMFS */
+#endif /* __APPS_INCLUDE_ZONEINFO_H */

system/zoneinfo/.gitignore

@@ -1,9 +1,12 @@
 /Make.dep
 /.depend
 /.built
-/.tzbin
+/.tzbuilt
-/.tzcode
+/.tzunpack
+/tzbin
+/tzcode
 /tz*-latest.tar.gz
+/romfs_zoneinfo.*
 /*.asm
 /*.rel
 /*.lst

system/zoneinfo/Kconfig

@@ -11,5 +11,31 @@ config SYSTEM_ZONEINFO
 		Build the TZ/Olson database.
 
 if SYSTEM_ZONEINFO
-endif
 
+config SYSTEM_ZONEINFO_ROMFS
+	bool "Build ROMFS filesystem"
+	default n
+	depends on FS_ROMFS
+	---help---
+		Build a mountable ROMFS filesystem containing the TZ database
+
+config SYSTEM_ZONEINFO_MNTCMD
+	bool "Zoneinfo mount command"
+	default n
+	depends on SYSTEM_ZONEINFO_ROMFS && NSH_BUILTIN_APPS
+	---help---
+		Build an NSH command that will mount the ROMFS filesystem containing
+		the TZ database at CONFIG_LIBC_TZDIR.
+
+config SYSTEM_ZONEINFO_RAMDEVNO
+	int "ROMFS minor number"
+	default 0
+	depends on SYSTEM_ZONEINFO_MNTCMD
+	---help---
+		Minor number to use when registering the ROM disk block driver.  The
+		driver will be registers as /dev/ramN where N is provided by
+		CONFIG_SYSTEM_ZONEINFO_RAMDEVNO.  This, of course, must not conflict
+		with other RAM/ROM disk devices that may have been previously
+		registered.
+
+endif # SYSTEM_ZONEINFO

system/zoneinfo/Makefile

@@ -49,7 +49,14 @@ STACKSIZE = 768
 
 ASRCS =
 CSRCS =
+
+ifeq ($(CONFIG_SYSTEM_ZONEINFO_ROMFS),y)
+CSRCS += tzromfs.c
+endif
+
+ifeq ($(CONFIG_SYSTEM_ZONEINFO_MNTCMD),y)
 MAINSRC = tzmount.c
+endif
 
 AOBJS = $(ASRCS:.S=$(OBJEXT))
 COBJS = $(CSRCS:.c=$(OBJEXT))
@@ -62,6 +69,10 @@ ifneq ($(CONFIG_BUILD_KERNEL),y)
   OBJS += $(MAINOBJ)
 endif
 
+ZONEINFO_PATH = $(APPDIR)/system/zoneinfo
+TZBIN_PATH = $(ZONEINFO_PATH)/tzbin
+TZCODE_PATH = $(ZONEINFO_PATH)/tzcode
+
 ifeq ($(CONFIG_WINDOWS_NATIVE),y)
   BIN = ..\..\libapps$(LIBEXT)
 else
@@ -88,7 +99,7 @@ ROOTDEPPATH = --dep-path .
 VPATH =
 
 all: .built
-.PHONY: tzcode_unpack tzdata_unpack tzcode_build tzbuild register context depend clean distclean
+.PHONY: romfs register context depend clean distclean
 
 $(AOBJS): %$(OBJEXT): %.S
 	$(call ASSEMBLE, $<, $@)
@@ -96,10 +107,12 @@ $(AOBJS): %$(OBJEXT): %.S
 $(COBJS) $(MAINOBJ): %$(OBJEXT): %.c
 	$(call COMPILE, $<, $@)
 
-.built: $(OBJS)
+.built: .tzbuilt romfs $(OBJS)
 	$(call ARCHIVE, $(BIN), $(OBJS))
 	$(Q) touch .built
 
+# Kernel mode program build
+
 ifeq ($(CONFIG_BUILD_KERNEL),y)
 $(BIN_DIR)$(DELIM)$(PROGNAME): $(OBJS) $(MAINOBJ)
 	@echo "LD: $(PROGNAME)"
@@ -113,6 +126,31 @@ install:
 
 endif
 
+# ROMFS file system containing the TZ database
+
+ifeq ($(CONFIG_SYSTEM_ZONEINFO_MNTCMD),y)
+
+checkgenromfs:
+	@genromfs -h 1>/dev/null 2>&1 || { \
+ echo "Host executable genromfs not available in PATH"; \
+ echo "You may need to download in from http://romfs.sourceforge.net/"; \
+ exit 1; \
+	}
+
+romfs_zoneinfo.img : checkgenromfs .tzbuilt
+	@genromfs -f $@ -d $(TZBIN_PATH)/etc/zoneinfo -V "TZDatbase" || { echo "genromfs failed" ; exit 1 ; }
+
+romfs_zoneinfo.h : romfs_zoneinfo.img
+	@xxd -i $< >$@ || { echo "xxd of $< failed" ; exit 1 ; }
+
+romfs: romfs_zoneinfo.h
+
+else
+
+romfs:
+
+endif # CONFIG_SYSTEM_ZONEINFO_MNTCMD
+
 # Build TZ database
 
 tzcode:
@@ -127,20 +165,18 @@ tzcode-latest.tar.gz:
 tzdata-latest.tar.gz:
 	$(Q) wget --retr-symlinks ftp://ftp.iana.org/tz/tzdata-latest.tar.gz
 
-tzcode_unpack: tzcode tzcode-latest.tar.gz
+.tzunpack: tzcode tzcode-latest.tar.gz tzdata-latest.tar.gz
 	$(Q) tar zx -C tzcode -f tzcode-latest.tar.gz
-
-tzdata_unpack: tzcode tzdata-latest.tar.gz
 	$(Q) tar zx -C tzcode -f tzdata-latest.tar.gz
+	$(Q) touch .tzunpack
 
-tzcode_build: tzcode_unpack
+.tzbuilt: tzcode tzbin .tzunpack
-
+	$(Q) $(MAKE) -C tzcode TOPDIR=$(TZBIN_PATH) install
-tzbuild: tzcode_build tzdata_unpack tzbin
+	$(Q) touch .tzbuilt
-	$(Q) $(MAKE) -C tzcode TOPDIR=$(PWD)$(DELIM)tzbin install
 
 # Register application
 
-ifeq ($(CONFIG_NSH_BUILTIN_APPS),y)
+ifeq ($(CONFIG_SYSTEM_ZONEINFO_MNTCMD),y)
 $(BUILTIN_REGISTRY)$(DELIM)$(APPNAME)_main.bdat: $(DEPCONFIG) Makefile
 	$(call REGISTER,$(APPNAME),$(PRIORITY),$(STACKSIZE),$(APPNAME)_main)
 
@@ -149,7 +185,7 @@ else
 register:
 endif
 
-context: tzbuild register
+context: .tzbuilt romfs register
 
 # Create dependencies
 
@@ -161,14 +197,18 @@ depend: .depend
 
 clean:
 	$(call DELFILE, .built)
-	$(call DELDIR, tzbin)
-	$(call DELDIR, tzcode)
 	$(call CLEAN)
 
 distclean: clean
 	$(call DELFILE, Make.dep)
 	$(call DELFILE, .depend)
+	$(call DELFILE, .tzunpack)
+	$(call DELFILE, .tzbuilt)
+	$(call DELFILE, romfs_zoneinfo.img)
+	$(call DELFILE, romfs_zoneinfo.h)
 	$(call DELFILE, tzdata-latest.tar.gz)
 	$(call DELFILE, tzcode-latest.tar.gz)
+	$(call DELDIR, tzbin)
+	$(call DELDIR, tzcode)
 
 -include Make.dep

system/zoneinfo/tzmount.c

@@ -38,10 +38,45 @@
  ****************************************************************************/
 
 #include <nuttx/config.h>
-#include <nuttx/progmem.h>
 
+#include <sys/mount.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <errno.h>
+
+#include <nuttx/fs/ramdisk.h>
+#include <apps/zoneinfo.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#ifndef CONFIG_SYSTEM_ZONEINFO_RAMDEVNO
+#  define CONFIG_SYSTEM_ZONEINFO_RAMDEVNO 1
+#endif
+
+#ifndef CONFIG_LIBC_TZDIR
+#  errror CONFIG_LIBC_TZDIR is not defined
+#endif
+
+#ifdef CONFIG_DISABLE_MOUNTPOINT
+#  error "Mountpoint support is disabled"
+#endif
+
+#if CONFIG_NFILE_DESCRIPTORS < 4
+#  error "Not enough file descriptors"
+#endif
+
+#ifndef CONFIG_FS_ROMFS
+#  error "ROMFS support not enabled"
+#endif
+
+#define SECTORSIZE  64
+#define NSECTORS(b) (((b)+SECTORSIZE-1)/SECTORSIZE)
+
+#define STR_RAMDEVNO(m)    #m
+#define MKMOUNT_DEVNAME(m) "/dev/ram" STR_RAMDEVNO(m)
+#define MOUNT_DEVNAME      MKMOUNT_DEVNAME(CONFIG_SYSTEM_ZONEINFO_RAMDEVNO)
 
 /****************************************************************************
  * Private Functions
@@ -57,9 +92,32 @@ int main(int argc, FAR char *argv[])
 int tzmount_main(int argc, char **argv)
 #endif
 {
-  /* This function is currently just a placeholder.  Future logic will
+   int  ret;
-   * mount a ROMFS volume here that hold the TZ database.
-   */
 
-  return OK;
+  /* Create a RAM disk for the test */
+
+  ret = romdisk_register(CONFIG_SYSTEM_ZONEINFO_RAMDEVNO,
+                         romfs_zoneinfo_img,
+                         NSECTORS(romfs_zoneinfo_img_len),
+                         SECTORSIZE);
+  if (ret < 0)
+    {
+      printf("ERROR: Failed to create RAM disk\n");
+      return EXIT_FAILURE;
+    }
+
+  /* Mount the test file system */
+
+  printf("Mounting ROMFS filesystem at target=%s with source=%s\n",
+         CONFIG_LIBC_TZDIR, MOUNT_DEVNAME);
+
+  ret = mount(MOUNT_DEVNAME, CONFIG_LIBC_TZDIR, "romfs", MS_RDONLY, NULL);
+  if (ret < 0)
+    {
+      printf("ERROR: Mount failed: %d\n", errno);
+      return EXIT_FAILURE;
+    }
+
+  printf("TZ database mounted at %s\n", CONFIG_LIBC_TZDIR);
+  return EXIT_SUCCESS;
 }

system/zoneinfo/tzromfs.c

@@ -0,0 +1,51 @@
+/****************************************************************************
+ * apps/system/zoneinfo/tzromfs.c
+ *
+ *   Copyright (C) 2015 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <apps/zoneinfo.h>
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+#include "romfs_zoneinfo.h"