1 files changed, 48 insertions, 0 deletions

diff --git a/update.c b/update.c
new file mode 100644
index 000000000..f3b7fc0c8
--- /dev/null
+++ b/update.c
@@ -0,0 +1,48 @@
+#include "internal.h"
+#include <linux/unistd.h>
+
+const char      update_usage[] = "update\n"
+"\n"
+"\tFlush buffered data to the disk devices every 30 seconds.\n";
+
+#if defined(__GLIBC__)
+#include <sys/kdaemon.h>
+#else
+_syscall2(int, bdflush, int, func, int, data);
+#endif /* __GLIBC__ */
+
+extern int
+update_main(struct FileInfo * i, int argc, char * * argv)
+{
+        /*
+         * Update is actually two daemons, bdflush and update.
+         */
+        int     pid;
+
+        pid = fork();
+        if ( pid < 0 )
+                return pid;
+        else if ( pid == 0 ) {
+                /*
+                 * This is no longer necessary since 1.3.5x, but it will harmlessly
+                 * exit if that is the case.
+                 */
+                strcpy(argv[0], "bdflush (update)");
+                argv[1] = 0;
+                argv[2] = 0;
+                bdflush(1, 0);
+                _exit(0);
+        }
+        pid = fork();
+        if ( pid < 0 )
+                return pid;
+        else if ( pid == 0 ) {
+                argv[0] = "update";
+                for ( ; ; ) {
+                        sync();
+                        sleep(30);
+                }
+        }
+
+        return 0;
+}