1 files changed, 99 insertions, 0 deletions
diff --git a/tools/xenstore/xenstored_posix.c b/tools/xenstore/xenstored_posix.c
new file mode 100644
index 0000000000..25bdf74716
--- /dev/null
+++ b/tools/xenstore/xenstored_posix.c
@@ -0,0 +1,99 @@
+/* 
+    Simple prototype Xen Store Daemon providing simple tree-like database.
+    Copyright (C) 2005 Rusty Russell IBM Corporation
+
+    This program 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 of the License, or
+    (at your option) any later version.
+
+    This program 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 this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <sys/mman.h>
+
+#include "utils.h"
+#include "xenstored_core.h"
+
+void write_pidfile(const char *pidfile)
+{
+	char buf[100];
+	int len;
+	int fd;
+
+	fd = open(pidfile, O_RDWR | O_CREAT, 0600);
+	if (fd == -1)
+		barf_perror("Opening pid file %s", pidfile);
+
+	/* We exit silently if daemon already running. */
+	if (lockf(fd, F_TLOCK, 0) == -1)
+		exit(0);
+
+	len = snprintf(buf, sizeof(buf), "%ld\n", (long)getpid());
+	if (write(fd, buf, len) != len)
+		barf_perror("Writing pid file %s", pidfile);
+}
+
+/* Stevens. */
+void daemonize(void)
+{
+	pid_t pid;
+
+	/* Separate from our parent via fork, so init inherits us. */
+	if ((pid = fork()) < 0)
+		barf_perror("Failed to fork daemon");
+	if (pid != 0)
+		exit(0);
+
+	/* Session leader so ^C doesn't whack us. */
+	setsid();
+
+	/* Let session leader exit so child cannot regain CTTY */
+	if ((pid = fork()) < 0)
+		barf_perror("Failed to fork daemon");
+	if (pid != 0)
+		exit(0);
+
+	/* Move off any mount points we might be in. */
+	if (chdir("/") == -1)
+		barf_perror("Failed to chdir");
+
+	/* Discard our parent's old-fashioned umask prejudices. */
+	umask(0);
+}
+
+void finish_daemonize(void)
+{
+	int devnull = open("/dev/null", O_RDWR);
+	if (devnull == -1)
+		barf_perror("Could not open /dev/null\n");
+	dup2(devnull, STDIN_FILENO);
+	dup2(devnull, STDOUT_FILENO);
+	dup2(devnull, STDERR_FILENO);
+	close(devnull);
+	xprintf = trace;
+}
+
+void init_pipe(int reopen_log_pipe[2])
+{
+	if (pipe(reopen_log_pipe)) {
+		barf_perror("pipe");
+	}
+}
+
+void unmap_xenbus(void *interface)
+{
+	munmap(interface, getpagesize());
+}