1 files changed, 138 insertions, 0 deletions
diff --git a/app/xfs/os/daemon.c b/app/xfs/os/daemon.c
new file mode 100644
index 000000000..2b23de328
--- /dev/null
+++ b/app/xfs/os/daemon.c
@@ -0,0 +1,138 @@
+/*
+
+Copyright (c) 1988  X Consortium
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of the X Consortium shall
+not be used in advertising or otherwise to promote the sale, use or
+other dealings in this Software without prior written authorization
+from the X Consortium.
+
+*/
+/* $XFree86: xc/programs/xfs/os/daemon.c,v 1.12 2002/10/20 21:42:50 tsi Exp $ */
+
+#include <X11/Xos.h>
+#include <sys/types.h>
+#include <errno.h>
+#include <stdlib.h>
+
+#if defined(USG)
+# include <termios.h>
+#else
+# include <sys/ioctl.h>
+#endif
+#ifdef hpux
+# include <sys/ptyio.h>
+#endif
+
+#ifdef X_NOT_POSIX
+# define Pid_t int
+#else
+# define Pid_t pid_t
+#endif
+
+#include "os.h"
+
+#if defined(__GLIBC__) || defined(CSRG_BASED)
+#define HAS_DAEMON
+#endif
+
+#ifndef X_NOT_POSIX
+#define HAS_SETSID
+#endif
+
+#ifndef HAS_SETSID
+
+#define setsid() MySetsid()
+
+static Pid_t
+MySetsid(void)
+{
+#if defined(TIOCNOTTY) || defined(TCCLRCTTY) || defined(TIOCTTY)
+    int fd;
+#endif
+    int stat;
+
+    fd = open("/dev/tty", O_RDWR);
+    if (fd >= 0) {
+#if defined(USG) && defined(TCCLRCTTY)
+	int zero = 0;
+	(void) ioctl (fd, TCCLRCTTY, &zero);
+#elif (defined(SYSV) || defined(SVR4)) && defined(TIOCTTY)
+	int zero = 0;
+	(void) ioctl (i, TIOCTTY, &zero);
+#elif defined(TIOCNOTTY)
+	(void) ioctl (i, TIOCNOTTY, (char *) 0);    /* detach, BSD style */
+#endif
+        close(fd);
+    }
+
+#if defined(SYSV) || defined(__QNXNTO__)
+    return setpgrp();
+#else
+    return setpgid(0, getpid());
+#endif
+}
+
+#endif /* !HAS_SETSID */
+
+
+/* detach */
+void
+BecomeDaemon ()
+{
+    /* If our C library has the daemon() function, just use it. */
+#ifdef HAS_DAEMON
+    daemon (0, 0);
+#else
+
+    switch (fork()) {
+    case -1:
+	/* error */
+	FatalError("daemon fork failed, %s\n", strerror(errno));
+	break;
+    case 0:
+	/* child */
+	break;
+    default:
+	/* parent */
+	exit(0);
+    }
+
+    if (setsid() == -1)
+	FatalError("setting session id for daemon failed: %s\n",
+		   strerror(errno));
+
+    chdir("/");
+
+    close (0);
+    close (1);
+    close (2);
+
+    /*
+     * Set up the standard file descriptors.
+     */
+    (void) open ("/dev/null", O_RDWR);
+    (void) dup2 (0, 1);
+    (void) dup2 (0, 2);
+
+#endif /* HAS_DAEMON */
+}