patch

MINIX操作系统的内核修改补丁

+ 
+   /* Main loop - get work and do it, forever. */         
+   while (TRUE) {              
+ 
+       /* Wait for incoming message, sets 'callnr' and 'who'. */
+       get_work(&m);
+ 
+       switch (callnr) {
+       case PROC_EVENT:
+ 	  sig_handler();
+           continue;
+       case SEMA_INIT:
+           result = do_init(&m);
+           break;
+       case SEMA_DOWN:
+ 	  result = do_down(&m);
+ 	  break;
+       case SEMA_UP:
+ 	  result = do_up(&m);
+ 	  break;
+       case SEMA_RELEASE:
+ 	  result = do_release(&m); 
+       case GETSYSINFO:
+ 	  result = do_getsysinfo(&m);
+ 	  break;
+       default: 
+           report("DS","warning, got illegal request from:", m.m_source);
+           result = EINVAL;
+       }
+ 
+       /* Finally send reply message, unless disabled. */
+       if (result != EDONTREPLY) {
+           m.m_type = result;  		/* build reply message */
+ 	  reply(who_e, &m);		/* send it away */
+       }
+   }
+   return(OK);				/* shouldn't come here */
+ }
+ 
+ /*===========================================================================*
+  *				 init_server                                 *
+  *===========================================================================*/
+ PRIVATE void init_server(int argc, char **argv)
+ {
+ /* Initialize the data store server. */
+   int i, s;
+   struct sigaction sigact;
+ 
+   /* Install signal handler. Ask PM to transform signal into message. */
+   sigact.sa_handler = SIG_MESS;
+   sigact.sa_mask = ~0;			/* block all other signals */
+   sigact.sa_flags = 0;			/* default behaviour */
+   if (sigaction(SIGTERM, &sigact, NULL) < 0) 
+       report("DS","warning, sigaction() failed", errno);
+ }
+ 
+ /*===========================================================================*
+  *				 sig_handler                                 *
+  *===========================================================================*/
+ PRIVATE void sig_handler()
+ {
+ /* Signal handler. */
+   sigset_t sigset;
+   int sig;
+ 
+   /* Try to obtain signal set from PM. */
+   if (getsigset(&sigset) != 0) return;
+ 
+   /* Check for known signals. */
+   if (sigismember(&sigset, SIGTERM)) {
+       exit_server();
+   }
+ }
+ 
+ /*===========================================================================*
+  *				exit_server                                  *
+  *===========================================================================*/
+ PRIVATE void exit_server()
+ {
+ /* Shut down the information service. */
+ 
+   /* Done. Now exit. */
+   exit(0);
+ }
+ 
+ /*===========================================================================*
+  *				get_work                                     *
+  *===========================================================================*/
+ PRIVATE void get_work(m_ptr)
+ message *m_ptr;				/* message buffer */
+ {
+     int status = 0;
+     status = receive(ANY, m_ptr);   /* this blocks until message arrives */
+     if (OK != status)
+         panic("SS","failed to receive message!", status);
+     who_e = m_ptr->m_source;        /* message arrived! set sender */
+     callnr = m_ptr->m_type;       /* set function call number */
+ }
+ 
+ /*===========================================================================*
+  *				reply					     *
+  *===========================================================================*/
+ PRIVATE void reply(who_e, m_ptr)
+ int who_e;                           	/* destination */
+ message *m_ptr;				/* message buffer */
+ {
+     int s;
+     s = send(who_e, m_ptr);    /* send the message */
+     if (OK != s)
+         panic("SS", "unable to send reply!", s);
+ }
+ 
diff -c -Nr src.clean/servers/ss/proto.h src/servers/ss/proto.h
*** src.clean/servers/ss/proto.h	Thu Jan  1 00:00:00 1970
--- src/servers/ss/proto.h	Fri Nov 14 20:45:35 2008
***************
*** 0 ****
--- 1,12 ----
+ /* Function prototypes. */
+ 
+ /* main.c */
+ _PROTOTYPE(int main, (int argc, char **argv));
+ 
+ /* sema.c */
+ _PROTOTYPE(int do_init, (message *m_ptr));
+ _PROTOTYPE(int do_down, (message *m_ptr));
+ _PROTOTYPE(int do_up, (message *m_ptr));
+ _PROTOTYPE(int do_release, (message *m_ptr));
+ _PROTOTYPE(int do_getsysinfo, (message *m_ptr));
+ 
diff -c -Nr src.clean/servers/ss/store.c src/servers/ss/store.c
*** src.clean/servers/ss/store.c	Thu Jan  1 00:00:00 1970
--- src/servers/ss/store.c	Sat Nov 15 15:37:29 2008
***************
*** 0 ****
--- 1,42 ----
+ /* Implementation of the Data Store. */
+ 
+ #include "inc.h"
+ 
+ PUBLIC int do_init(m_ptr)
+ message *m_ptr;					/* request message */
+ {
+ 
+     printf("ss:init,%d",m_ptr->m_source);
+   return(OK);
+ }
+ 
+ 
+ PUBLIC int do_up(m_ptr)
+ message *m_ptr;					/* request message */
+ {
+   return(OK);					/* key not found */
+ }
+ 
+ 
+ PUBLIC int do_down(m_ptr)
+ message *m_ptr;					/* request message */
+ {
+   return(OK);
+ }
+ 
+ PUBLIC int do_release(m_ptr)
+ message *m_ptr;					/* request message */
+ {
+   return(OK);
+ }
+ 
+ 
+ /*===========================================================================*
+  *				do_getsysinfo				     *
+  *===========================================================================*/
+ PUBLIC int do_getsysinfo(m_ptr)
+ message *m_ptr;
+ {
+   return(OK);
+ }
+ 
diff -c -Nr src.clean/servers/ss/store.h src/servers/ss/store.h
*** src.clean/servers/ss/store.h	Thu Jan  1 00:00:00 1970
--- src/servers/ss/store.h	Fri Nov 14 19:57:49 2008
***************
*** 0 ****
--- 1,7 ----
+ /* Type definitions for the Data Store Server. */
+ struct semaphore {
+   int sema_nr;			/* flags for this store */
+   int start_nr;			/* key to lookup information */
+ };
+ 
+ 
diff -c -Nr src.clean/tools/Makefile src/tools/Makefile
*** src.clean/tools/Makefile	Thu Nov 13 17:54:56 2008
--- src/tools/Makefile	Fri Nov 14 20:19:43 2008
***************
*** 11,16 ****
--- 11,17 ----
  	../servers/fs/fs \
  	../servers/rs/rs \
  	../servers/ds/ds \
+ 	../servers/ss/ss \
  	../drivers/tty/tty \
  	../drivers/memory/memory \
  	../drivers/log/log \
diff -c -Nr src.clean/tools/Makefile~ src/tools/Makefile~
*** src.clean/tools/Makefile~	Thu Jan  1 00:00:00 1970
--- src/tools/Makefile~	Sun Apr  9 23:16:13 2006
***************
*** 0 ****
--- 1,100 ----
+ # Makefile for the kernel image.
+ 
+ u=/usr
+ CC=	exec cc
+ CFLAGS=	-O -D_MINIX -D_POSIX_SOURCE
+ MDEC=	/usr/mdec
+ 
+ # Specify the programs that are part of the system image.
+ PROGRAMS=	../kernel/kernel \
+ 	../servers/pm/pm \
+ 	../servers/fs/fs \
+ 	../servers/rs/rs \
+ 	../servers/ds/ds \
+ 	../drivers/tty/tty \
+ 	../drivers/memory/memory \
+ 	../drivers/log/log \
+ 	../servers/init/init
+ 
+ usage:	
+ 	@echo " " >&2
+ 	@echo "Master Makefile to create new MINIX configuration." >& 2
+ 	@echo "Root privileges are required." >&2
+ 	@echo " " >&2
+ 	@echo "Usage:" >&2
+ 	@echo "	make includes   # Install include files" >&2
+ 	@echo "	make depend     # Generate dependency files" >&2
+ 	@echo "	make libraries  # Make system libraries" >&2
+ 	@echo "	make services   # Compile and install all services" >&2
+ 	@echo "	make fresh      # Make clean, libraries, and services" >&2
+ 	@echo "	make image      # Make needed services and create boot image" >&2
+ 	@echo "	make install    # Make image, and install to hard disk" >&2
+ 	@echo "	make hdboot     # Make image, and install to hard disk" >&2
+ 	@echo "	make fdboot     # Make image, and install to floppy disk" >&2
+ 	@echo "	make bootable   # Make hard disk bootable" >&2
+ 	@echo "	make clean      # Remove all compiler results, except libs" >&2
+ 	@echo " " >&2
+ 	@echo "To create a fresh MINIX configuration, try:" >&2
+ 	@echo "	make clean install      # new boot image" >&2
+ 	@echo "	make fresh install      # new everything" >&2
+ 	@echo " " >&2
+ 
+ # create a fresh configuration or system image
+ fresh: 
+ 	cd ../lib && $(MAKE) clean
+ 	$(MAKE) clean 
+ 	$(MAKE) libraries services
+ 
+ all: services image
+ 
+ image:  includes
+ 	cd ../kernel && $(MAKE) 
+ 	cd ../servers && $(MAKE) image
+ 	cd ../drivers && $(MAKE) image
+ 	installboot -image $@ $(PROGRAMS)
+ 
+ image_small:  includes
+ 	cd ../kernel && $(MAKE) 
+ 	cd ../servers && $(MAKE) EXTRA_OPTS=-D_MINIX_SMALL=1 image
+ 	cd ../drivers && $(MAKE) EXTRA_OPTS=$(EXTRA_OPTS) image
+ 	installboot -image $@ $(PROGRAMS)
+ 
+ # rebuild the program or system libraries
+ includes:
+ 	cd ../include && $(MAKE) install
+ 
+ depend: includes
+ 	cd ../ && $(MAKE) depend
+ 
+ services: includes 
+ 	cd ../kernel && $(MAKE) 
+ 	cd ../servers && $(MAKE) install
+ 	cd ../drivers && $(MAKE) install
+ 
+ libraries: includes
+ 	cd ../lib && $(MAKE) clean
+ 	cd ../lib && $(MAKE) all
+ 	cd ../lib && $(MAKE) install
+ 
+ 
+ # make bootable and place system images
+ bootable:
+ 	exec su root mkboot bootable
+ 
+ hdboot:	image
+ 	exec sh mkboot $@
+ 	@sync
+ 
+ fdboot:	image
+ 	exec su root mkboot $@
+ 	@sync
+ 
+ install: includes services hdboot
+ 
+ # clean up compile results
+ clean:
+ 	cd ../kernel && $(MAKE) $@
+ 	cd ../servers && $(MAKE) $@
+ 	cd ../drivers && $(MAKE) $@
+ 	rm -rf *.bak image image_small *.iso *.iso.gz cdfdimage rootimage src
+ 
diff -c -Nr src.clean/tools/revision src/tools/revision
*** src.clean/tools/revision	Thu Nov 13 17:54:56 2008
--- src/tools/revision	Sat Nov 15 15:38:37 2008
***************
*** 1 ****
! 0
--- 1 ----
! 20