7 files changed, 324 insertions, 0 deletions
diff --git a/sdk/proc/Makefile.in b/sdk/proc/Makefile.in
new file mode 100644
index 0000000..94ae3cb
--- /dev/null
+++ b/sdk/proc/Makefile.in
@@ -0,0 +1,18 @@
+#
+# Template to build our "other" object modules(libother.a)
+# $Id: Makefile.in 1.2 Wed, 19 Mar 1997 12:44:53 -0500 dyfet $
+# Copyright (c) 1997 by Tycho Softworks.
+#
+
+OBJS = spawn.o pdetach.o priority.o
+
+.c.o:
+	$(CC) $(CFLAGS) $(OPTIMIZE) -I.. -o $@ -c $<
+	$(AR) r ../lib/libproc.a $@
+
+all:	$(OBJS)
+	ranlib ../lib/libproc.a
+
+clean:
+	rm *.o
+
diff --git a/sdk/proc/bind.conf b/sdk/proc/bind.conf
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/sdk/proc/bind.conf
@@ -0,0 +1 @@
+
diff --git a/sdk/proc/make.conf b/sdk/proc/make.conf
new file mode 100644
index 0000000..2ce0aaa
--- /dev/null
+++ b/sdk/proc/make.conf
@@ -0,0 +1,5 @@
+inc=$CONFIG_HOST/include
+
+fn_find_file SYS_RESOURCE_H_MISSING $inc/sys/resource.h
+fn_find_type SETPRIORITY_F_MISSING setpriority $inc/sys/resource.h
+
diff --git a/sdk/proc/pdetach.c b/sdk/proc/pdetach.c
new file mode 100644
index 0000000..40814e4
--- /dev/null
+++ b/sdk/proc/pdetach.c
@@ -0,0 +1,78 @@
+/*
+ * Deamon-ify a user process; detach from controlling terminal and parent.
+ * $Id: daemon.c 1.2 Wed, 19 Mar 1997 12:44:53 -0500 dyfet $
+ * Copyright (c) 1997 by Tycho Softworks.
+ * For conditions on distribution and reuse see product license.
+ *
+ * Abstract:
+ *	Daemon processes are commonly used in UNIX to build server
+ *	applications.  This module captures the essense of functionality
+ *	required to make a process into a daemon within a single function
+ *	call.
+ *
+ * Functions:
+ *	daemon() - convert user process into a daemon.
+ */
+
+#include <proc/process.h>
+#include <std/signal.h>
+
+/* Daemonify a user process under UNIX.
+ *
+ * Abstract:
+ *	In UNIX, a user process becomes a daemon by detaching itself from
+ *	it's parent process and establishes it's own process group.  A
+ *	daemon may also detach itself from it's controlling terminal.
+ *	This is usually accomplished through fork().
+ *
+ * Paramaters:
+ *	flag - specifies daemon mode of operation:
+ *		D_KEEPALL 	keeps all files open.
+ *		D_KEEPSTDIO	keeps stdio (stdin, stdout, stderr) open.
+ *		D_KEEPNONIO	detaches from stdio, keeps other files.
+ *		D_KEEPNONE	closes all open files.
+ *
+ * Returns:
+ *	New pid of user process running as a daemon.
+ *
+ * Exceptions:
+ *	Any failure terminates the process.  No error message is possible
+ *	since the process may already be detached from user I/O.
+ */
+
+pid_t	pdetach(int flag)
+{
+	pid_t	pid;
+	int	max = OPEN_MAX;
+	int	i;
+
+	signal(SIGHUP, SIG_IGN);
+
+	i = 0;
+	if(flag == D_KEEPSTDIO)
+		i = 3;
+
+	if(flag == D_KEEPNONIO)
+		max = 3;
+		
+	while((i < max) && (flag != D_KEEPALL))
+		close(i++);
+
+	pid = fork();
+	if(pid < 0)
+		return pid;
+
+	if(pid > 0)
+		exit(EX_OK);
+
+	setsid();
+	setpgid(0, getpid());
+	pid = fork();
+	if(pid < 0)
+		return pid;
+
+	if(pid > 0)
+		exit(EX_OK);
+	
+	return	getpid();
+}
diff --git a/sdk/proc/priority.c b/sdk/proc/priority.c
new file mode 100644
index 0000000..8818567
--- /dev/null
+++ b/sdk/proc/priority.c
@@ -0,0 +1,73 @@
+/*
+ * Specify process for soft realtime scheduling treatment.
+ * $Id$
+ * Copyright (c) 1997 by Tycho Softworks.
+ * For conditions of distribution and reuse see product license.
+ */
+ 
+#include <proc/process.h>
+#include <std/time.h>
+
+#ifndef	SYS_RESOURCE_H_MISSING
+#include <sys/resource.h>
+#endif
+
+#ifndef	SETPRIORITY_F_MISSING
+
+int	priority(int pri)
+{
+#ifdef	_POSIX_PRIORITY_SCHEDULING
+	#define	_P	__P
+
+	#include <sched.h>
+
+	struct	sched_param p;
+#endif
+	int newpri = getpriority(PRIO_PROCESS, 0) - pri - 1;
+
+	if(setpriority(PRIO_PROCESS, 0, newpri))
+		return -1;
+
+#ifdef	_POSIX_MEMLOCK
+	#include <linux/mman.h>
+
+	if(mlockall(MCL_CURRENT | MCL_FUTURE))
+		return -1;
+#endif
+
+#ifdef	_POSIX_PRIORITY_SCHEDULING
+	if(pri > 0)
+	{
+		p.sched_priority = sched_get_priority_min(SCHED_RR) + pri - 1;
+		if(sched_setscheduler(0, SCHED_RR, &p))
+			return -1;
+	} 
+#endif
+	
+	return 0;
+}
+
+#else
+
+int	priority(int priority)
+{
+	return nice(- priority - 1);
+}
+#endif
+
+#ifdef	_POSIX_PRIORITY_SCHEDULING
+#include <sched.h>
+
+void	yield(void)
+{
+	sched_yield();
+}
+#else
+
+void	yield(void)
+{
+	sleep(0);
+}
+#endif
+	
+
diff --git a/sdk/proc/process.h b/sdk/proc/process.h
new file mode 100644
index 0000000..d65b765
--- /dev/null
+++ b/sdk/proc/process.h
@@ -0,0 +1,57 @@
+/*
+ * Portable process handling routines.
+ * $Id$
+ * Copyright (c) 1997 by Tycho Softworks.
+ * For conditions of distribution and reuse see product license.
+ */
+
+#ifndef	__PROC_PROCESS_H__
+#define	__PROC_PROCESS_H__
+
+#ifndef	__STD_PROCESS_H__
+#include <std/process.h>
+#endif
+
+/* Spawn services under UNIX fork()	*/
+
+#define	P_NOWAIT	0x00	/* Default, run concurrent */
+#define	P_WAIT		0x01	/* Wait for and return exit status */
+#define	P_BACKGROUND	0x02	/* Detach child from our stdio */
+#define	P_SESSION	0x04	/* Use setsid() on child */
+#define	P_OVERLAY	0x08	/* Really 'exec' called via spawn */
+
+/* Some common/portable spawn varients and masks */
+
+#define	P_DETACH	P_NOWAIT | P_SESSION | P_BACKGROUND
+#define	P_NOWAITO	P_NOWAIT | P_SESSION
+
+/* Daemon initialization options */
+
+#define	D_KEEPSTDIO	0	/* Daemon keeps stdio connection */
+#define	D_KEEPALL	1	/* Daemon keeps all open files */
+#define	D_KEEPNONIO	2	/* Detach from stdio, keep others open */
+#define	D_KEEPNONE	3	/* Deamon closes all files */
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/* Common process invokation services using fork() */ 
+
+#ifdef	__NAMESPACE
+#define	spawnv	__NAMESPACE(spawnv)
+#define	spawnvp	__NAMESPACE(spawnvp)
+#define	pdetach	__NAMESPACE(pdetach)
+#define	priority __NAMEPSACE(priority)
+#endif
+
+int	spawnv(const int P_mode, const char *path, char *const argv[]);
+int	spawnvp(const int P_mode, const char *path, char *const argv[]);
+pid_t	pdetach(const int D_flag);	/* Make current process a daemon */
+int	priority(int pri);	/* set realtime priorities */
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif
diff --git a/sdk/proc/spawn.c b/sdk/proc/spawn.c
new file mode 100644
index 0000000..2b6d7db
--- /dev/null
+++ b/sdk/proc/spawn.c
@@ -0,0 +1,92 @@
+/* 
+ * Spawn services built on fork() for those libc's that lack spawning.
+ * $Id$
+ * Copyright (c) 1997 by Tycho Softworks.
+ * For conditions of distribution and reuse see product license.
+ */
+
+#include <proc/process.h>
+#include <std/files.h>
+
+static	void	spawn_redirect(int io, int mode)
+{
+	int	fd = open("/dev/null", mode);
+
+	if(fd < 0)
+		exit(EX_OSFILE);
+
+	if(fd != io)
+	{
+		dup2(fd, io);
+		close(fd);
+	}
+}
+
+static	int	spawn_wait(pid_t pid, int mode)
+{
+	int	waitflag = mode & P_WAIT;
+
+	/* -1 on fork failure */
+
+	if(pid == -1)
+		return -1;
+
+	if(!waitflag)
+		return pid;		
+
+	waitpid(pid, &waitflag, 0);
+	return WEXITSTATUS(waitflag);
+}		
+	
+static	void	spawn_mode(int mode)
+{
+	int	i;
+
+	if(mode & P_BACKGROUND)
+	{
+		spawn_redirect(0, O_RDONLY);
+		spawn_redirect(1, O_WRONLY);
+		spawn_redirect(2, O_WRONLY);
+	}
+
+	for(i = 3; i < OPEN_MAX; ++i)
+		close(i);
+
+	if(mode & P_SESSION)
+		setsid();
+}
+
+int	spawnv(const int mode, const char *path, char *const argv[])
+{
+	pid_t pid = 0;
+	int	status;
+
+	if(!(mode & P_OVERLAY))
+		pid = fork();
+
+	if(pid)
+		return spawn_wait(pid, mode);
+	
+	spawn_mode(mode);
+	execv(path, argv);
+	exit(EX_UNAVAILABLE);
+	return -1;
+}
+
+int	spawnvp(const int mode, const char *path, char *const argv[])   
+{
+	pid_t pid = 0;
+	int	status;
+
+	if(!(mode & P_OVERLAY))
+		pid = fork();
+
+	if(pid)
+		return spawn_wait(pid, mode); 
+
+	spawn_mode(mode);
+	execvp(path, argv);
+	exit(EX_UNAVAILABLE);
+	return -1;
+}
+