From 0d530384a33a9573b650f4f86d8198af7bedd9ac Mon Sep 17 00:00:00 2001
From: Sapan Bhatia <sapanb@cs.princeton.edu>
Date: Tue, 24 Mar 2009 21:46:34 +0000
Subject: [PATCH] Fd passing script for fusemount

---
 fd_fusemount.c | 68 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 fd_fusemount.c

diff --git a/fd_fusemount.c b/fd_fusemount.c
new file mode 100644
index 0000000..6280244
--- /dev/null
+++ b/fd_fusemount.c
@@ -0,0 +1,68 @@
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+#include "fdpass.h"
+
+unsigned int rcvbuf = 16*1024*1024;
+unsigned int arg_length = 128;
+
+void receive_argument(int control_channel_fd, char *source) {
+    int received;
+    received=recv(control_channel_fd, source, arg_length);
+    if (received<arg_length) {
+        printf("Error receiving arguments over the control buffer\n");
+        exit(1);
+    }
+}
+
+int get_magic_fd (char *data) {
+    char *ptr;
+    int fd;
+
+    data[arg_length-1]='\0';
+    ptr = strstr(data,"fd=");
+    if (!ptr)
+        return -1;
+
+    // Found two fd= expressions
+    if (strstr(ptr+3,"fd="))
+        return -1;
+
+    if (*(ptr+3)!='\0') {
+        sscanf(ptr+3,"%d",&fd);
+        return fd;
+    }
+    else
+        return -1;
+}
+
+int main(int argc, char *argv[]) {
+    int control_channel_fd, magic_fd;
+    char source[128],target[128],filesystemtype[128],data[129];
+
+    int received;
+
+    if (argc < 3) {
+        printf("This script is called by vsys.\n");
+        exit(1);
+    }
+
+    sscanf(argv[2],"%d", &control_channel_fd);
+
+    receive_argument(control_channel_fd, source);
+    receive_argument(control_channel_fd, target);
+    receive_argument(control_channel_fd, filesystemtype);
+    receive_argument(control_channel_fd, data);
+    
+    magic_fd = get_magic_fd (data);
+
+    if (magic_fd < 3) {
+        printf("Got fd %d in fusemount\n",magic_fd);
+        exit(1);
+    }
+
+
+
+}
-- 
2.43.0