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authorThomas Schwinge <tschwinge@gnu.org>2007-11-13 19:34:40 +0100
committerThomas Schwinge <tschwinge@gnu.org>2007-11-13 19:34:40 +0100
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-[[meta copyright="Copyright © 2007 Free Software Foundation, Inc."]]
-[[meta license="Permission is granted to copy, distribute and/or modify this
-document under the terms of the GNU Free Documentation License, Version 1.2 or
-any later version published by the Free Software Foundation; with no Invariant
-Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license
-is included in the section entitled
-[[GNU_Free_Documentation_License|/fdl]]."]]
-
-## Data User-Server Translator Example
-
-The code examples were written by Anand Babu.
-
-We have a data.h header file, a data.defs file, a data-user.c, data-server.c
-sources files and a Makefile.
-
-data.h:
--------
-
- #ifndef _data_user_
- #define _data_user_
-
- /* Module data */
-
- #include <mach/kern_return.h>
- #include <mach/port.h>
- #include <mach/message.h>
-
- #include <mach/std_types.h>
- #include <mach/mach_types.h>
- #include <device/device_types.h>
- #include <device/net_status.h>
- #include <sys/types.h>
- #include <sys/stat.h>
- #include <sys/statfs.h>
- #include <sys/resource.h>
- #include <sys/utsname.h>
- #include <hurd/hurd_types.h>
-
- /* Routine data_set_value */
- #ifdef mig_external
- mig_external
- #else
- extern
- #endif
- kern_return_t S_data_set_value
- #if defined(LINTLIBRARY)
- (data_port, value)
- mach_port_t data_port;
- int value;
- { return S_data_set_value(data_port, value); }
- #else
- (
- mach_port_t data_port,
- int value
- );
- #endif
-
- /* Routine data_get_value */
- #ifdef mig_external
- mig_external
- #else
- extern
- #endif
- kern_return_t S_data_get_value
- #if defined(LINTLIBRARY)
- (data_port, value)
- mach_port_t data_port;
- int *value;
- { return S_data_get_value(data_port, value); }
- #else
- (
- mach_port_t data_port,
- int *value
- );
- #endif
-
- #endif /* not defined(_data_user_) */
-
-data.defs:
-----------
-
- /* Definitions for data interface
-
- This file is part of the GNU Hurd.
-
- The GNU Hurd is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- The GNU Hurd is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with the GNU Hurd; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- subsystem data 45000;
-
- #include <hurd/hurd_types.defs>
-
- #ifdef STACK_IMPORTS
- STACK_IMPORTS
- #endif
-
- /* intr-rpc.defs defines the INTR_INTERFACE macro to make the generated RPC
- stubs send-interruptible, and to prefix them with `hurd_intr_rpc_'. */
- INTR_INTERFACE
-
- /* set integer value to data */
- routine data_set_value (
- data_port: mach_port_t;
- value: int);
-
- /* get integer value from data */
- routine data_get_value (
- data_port: mach_port_t;
- out value: int);
-
-data-user.c:
-------------
-
- #include <stdio.h>
- #include <hurd.h>
- #include <hurd/hurd_types.h>
- #include "data.h"
-
- #ifndef _GNU_SOURCE
- #define _GNU_SOURCE
- #endif
-
- int
- main(int argc, char *argv[])
- {
- int value=0;
- mach_port_t data_server_port;
-
- data_server_port = file_name_lookup ("/tmp/trans", 0, 0);
- printf ("data_server_port [%u]\n", data_server_port);
- S_data_set_value (data_server_port, 99);
- S_data_get_value (data_server_port, &value);
- printf ("data->get_value: [%d]\n", value);
-
- return 0;
- }
-
-data-server.c:
---------------
-
- #ifndef _GNU_SOURCE
- #define _GNU_SOURCE
- #endif
-
- #include <stdio.h>
- #include <getopt.h>
- #include <errno.h>
- #include <sys/stat.h>
- #include <error.h>
-
- #include <hurd/ports.h>
- #include <hurd/hurd_types.h>
- #include <hurd/trivfs.h>
-
- #include "data.h"
-
- extern boolean_t S_data_server
- (mach_msg_header_t *InHeadP, mach_msg_header_t *OutHeadP);
-
- int trivfs_fstype = FSTYPE_MISC;
- int trivfs_fsid = 0;
- int trivfs_support_read = 0;
- int trivfs_support_write = 0;
- int trivfs_support_exec = 0;
- int trivfs_allow_open = 0x00;
- int trivfs_protid_nportclasses = 0;
- int trivfs_cntl_nportclasses = 0;
-
- int data_value;
-
- int demuxer (mach_msg_header_t *inp, mach_msg_header_t *outp)
- {
- return (S_data_server(inp,outp)||trivfs_demuxer(inp,outp));
- }
-
- void trivfs_modify_stat (struct trivfs_protid *cred, io_statbuf_t *st)
- {
- }
- error_t trivfs_goaway (struct trivfs_control *fsys, int flags)
- {
- exit (0);
- }
-
- kern_return_t S_data_set_value (mach_port_t data_port, int value)
- {
- data_value = value;
- return 0;
- }
-
- kern_return_t S_data_get_value (mach_port_t data_port, int *value)
- {
- *value = data_value;
- return 0;
- }
-
- int
- main(int argc, char *argv[])
- {
- int err;
- mach_port_t bootstrap;
- struct trivfs_control *fsys;
-
- if (argc > 1)
- {
- fprintf(stderr, "Usage: settrans [opts] node %s\n", program_invocation_name);
- exit (1);
- }
-
- task_get_bootstrap_port (mach_task_self (), &bootstrap);
- if (bootstrap == MACH_PORT_NULL)
- error(2, 0, "Must be started as a translator");
-
- /* Reply to our parent */
- err = trivfs_startup (bootstrap, 0, 0, 0, 0, 0,&fsys);
- mach_port_deallocate (mach_task_self (), bootstrap);
- if (err) {
- return (0);
- }
-
- ports_manage_port_operations_one_thread (fsys->pi.bucket, demuxer, 0);
-
- return 0;
- }
-
-Makefile:
----------
-
- CC = gcc
- MIG = mig
- CFLAGS = -Wall -g -D_GNU_SOURCE
- LDFLAGS = -lthreads -lports -ltrivfs -lfshelp -lshouldbeinlibc
- INCLUDES = -I.
- LCHDRS =
- MIGCOMSFLAGS = -prefix S_
- OBJS = $(SRCS:.c=.o)
- TAGS = etags.emacs21
-
- all: data-server data-user
- tags:
- $(TAGS) $(SRCS) $(LCHDRS)
-
- stubs: data.defs
- $(MIG) $(MIGCOMSFLAGS) -server dataServer.c -user dataUser.c $^
- data-server: data-server.c dataServer.c
- $(CC) $^ $(CFLAGS) $(INCLUDES) $(LDFLAGS) -o $@
- data-user: data-user.c dataUser.c
- $(CC) $^ $(CFLAGS) $(INCLUDES) -o $@
- clean:
- rm -f *.o data-server data-user
-
- start: data-server data-user
- settrans -ac /tmp/trans data-server
- ps -x | grep data-server
- end:
- settrans -fg /tmp/trans
-
-Building
---------
-
-Do
-
- make stubs
-
-to create the dataUser.c and dataServer.c files generated by mig. Create the
-executables using:
-
- make all
-
-Testing
--------
-
-Start the data-server translator using:
-
- settrans -ac /tmp/trans data-server
-
-You can check if it is running using
-
- ps -x | grep data-server
-
-Run the data-user executable to get the resultant output.
-
-You can remove the translator using:
-
- settrans -fg /tmp/trans
-
-To remove the built files use:
-
- make clean
-
-Happy Hacking!