X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=blobdiff_plain;f=windows%2Fwinnpc.c;h=85a3c3ffc3b6e37b252ba0c7f1d92cd41d33fa7d;hb=21101c7397e460933635a7bfed813864fc4f88fe;hp=90e2cbda66b48b710f669f7075f70da03b002b26;hpb=f6f78f835543099d4b5e342ba34f91104862803b;p=PuTTY.git

diff --git a/windows/winnpc.c b/windows/winnpc.c
index 90e2cbda..85a3c3ff 100644
--- a/windows/winnpc.c
+++ b/windows/winnpc.c
@@ -16,8 +16,8 @@
 
 #include "winsecur.h"
 
-Socket make_handle_socket(HANDLE send_H, HANDLE recv_H, Plug plug,
-                          int overlapped);
+Socket make_handle_socket(HANDLE send_H, HANDLE recv_H, HANDLE stderr_H,
+                          Plug plug, int overlapped);
 
 Socket new_named_pipe_client(const char *pipename, Plug plug)
 {
@@ -30,15 +30,36 @@ Socket new_named_pipe_client(const char *pipename, Plug plug)
     assert(strncmp(pipename, "\\\\.\\pipe\\", 9) == 0);
     assert(strchr(pipename + 9, '\\') == NULL);
 
-    pipehandle = CreateFile(pipename, GENERIC_READ | GENERIC_WRITE, 0, NULL,
-                            OPEN_EXISTING, FILE_FLAG_OVERLAPPED, NULL);
+    while (1) {
+        pipehandle = CreateFile(pipename, GENERIC_READ | GENERIC_WRITE,
+                                0, NULL, OPEN_EXISTING,
+                                FILE_FLAG_OVERLAPPED, NULL);
 
-    if (pipehandle == INVALID_HANDLE_VALUE) {
-        err = dupprintf("Unable to open named pipe '%s': %s",
-                        pipename, win_strerror(GetLastError()));
-        ret = new_error_socket(err, plug);
-        sfree(err);
-        return ret;
+        if (pipehandle != INVALID_HANDLE_VALUE)
+            break;
+
+        if (GetLastError() != ERROR_PIPE_BUSY) {
+            err = dupprintf("Unable to open named pipe '%s': %s",
+                            pipename, win_strerror(GetLastError()));
+            ret = new_error_socket(err, plug);
+            sfree(err);
+            return ret;
+        }
+
+        /*
+         * If we got ERROR_PIPE_BUSY, wait for the server to
+         * create a new pipe instance. (Since the server is
+         * expected to be winnps.c, which will do that immediately
+         * after a previous connection is accepted, that shouldn't
+         * take excessively long.)
+         */
+        if (!WaitNamedPipe(pipename, NMPWAIT_USE_DEFAULT_WAIT)) {
+            err = dupprintf("Error waiting for named pipe '%s': %s",
+                            pipename, win_strerror(GetLastError()));
+            ret = new_error_socket(err, plug);
+            sfree(err);
+            return ret;
+        }
     }
 
     if ((usersid = get_user_sid()) == NULL) {
@@ -49,10 +70,10 @@ Socket new_named_pipe_client(const char *pipename, Plug plug)
         return ret;
     }
 
-    if (GetSecurityInfo(pipehandle, SE_KERNEL_OBJECT,
-                        OWNER_SECURITY_INFORMATION,
-                        &pipeowner, NULL, NULL, NULL,
-                        &psd) != ERROR_SUCCESS) {
+    if (p_GetSecurityInfo(pipehandle, SE_KERNEL_OBJECT,
+                          OWNER_SECURITY_INFORMATION,
+                          &pipeowner, NULL, NULL, NULL,
+                          &psd) != ERROR_SUCCESS) {
         err = dupprintf("Unable to get named pipe security information: %s",
                         win_strerror(GetLastError()));
         ret = new_error_socket(err, plug);
@@ -75,7 +96,7 @@ Socket new_named_pipe_client(const char *pipename, Plug plug)
     LocalFree(psd);
     sfree(usersid);
 
-    return make_handle_socket(pipehandle, pipehandle, plug, TRUE);
+    return make_handle_socket(pipehandle, pipehandle, NULL, plug, TRUE);
 }
 
 #endif /* !defined NO_SECURITY */