testprogs/win32: add an option to trigger small reads in npecho_client2.c

metze

1 files changed, 76 insertions, 7 deletions

diff --git a/testprogs/win32/npecho/npecho_client2.c b/testprogs/win32/npecho/npecho_client2.c
index 892574beb0..ebf4f9ad17 100755
--- a/testprogs/win32/npecho/npecho_client2.c
+++ b/testprogs/win32/npecho/npecho_client2.c
@@ -15,11 +15,20 @@ int main(int argc, char *argv[])
 	HANDLE h;
 	DWORD numread = 0;
 	char *outbuffer = malloc(sizeof(ECHODATA)*2);
+	BOOL small_reads = FALSE;
+	DWORD state = 0;
+	DWORD flags = 0;
 
 	if (argc == 1) {
-		printf("Usage: %s pipename\n", argv[0]);
-		printf("  Where pipename is something like \\\\servername\\NPECHO\n");
-		return -1;
+		goto usage;
+	} else if (argc >= 3) {
+		if (strcmp(argv[2], "large") == 0) {
+			small_reads = FALSE;
+		} else if (strcmp(argv[2], "small") == 0) {
+			small_reads = TRUE;
+		} else {
+			goto usage;
+		}
 	}
 
 	h = CreateFile(argv[1], GENERIC_READ|GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);
@@ -28,14 +37,69 @@ int main(int argc, char *argv[])
 		return -1;
 	}
 
-	Sleep(5000);
+	GetNamedPipeHandleState(h, &state, NULL, NULL, NULL, NULL, 0);
 
-	if (!ReadFile(h, outbuffer, sizeof(ECHODATA)*2, &numread, NULL)) {
-		printf("Error reading: %d\n", GetLastError());
-		return -1;
+	if (state & PIPE_READMODE_MESSAGE) {
+		printf("message read mode\n");
+	} else {
+		printf("byte read mode\n");
 	}
 
+	Sleep(5000);
+
+	if (small_reads) {
+		DWORD ofs, size, nread;
+		const char *more = "";
+		printf("small reads\n");
+		numread = 0;
+		ofs = 0;
+		size = sizeof(ECHODATA)/2;
+		if (ReadFile(h, outbuffer+ofs, size, &nread, NULL)) {
+			if (state & PIPE_READMODE_MESSAGE) {
+				printf("Error message mode small read succeeded\n");
+				return -1;
+			}
+		} else if (GetLastError() == ERROR_MORE_DATA) {
+			if (!(state & PIPE_READMODE_MESSAGE)) {
+				printf("Error byte mode small read returned ERROR_MORE_DATA\n");
+				return -1;
+			}
+			more = " more data";
+		} else {
+			printf("Error reading: %d\n", GetLastError());
+			return -1;
+		}
+		printf("Small Read: %d%s\n", nread, more);
+		numread += nread;
+		ofs = size;
+		size = sizeof(ECHODATA) - ofs;
+		if (!ReadFile(h, outbuffer+ofs, size, &nread, NULL)) {
+			printf("Error reading: %d\n", GetLastError());
+			return -1;
+		}
+		printf("Small Read: %d\n", nread);
+		numread += nread;
+	} else {
+		printf("large read\n");
+		if (!ReadFile(h, outbuffer, sizeof(ECHODATA)*2, &numread, NULL)) {
+			printf("Error reading: %d\n", GetLastError());
+			return -1;
+		}
+	}
 	printf("Read: %s %d\n", outbuffer, numread);
+	if (state & PIPE_READMODE_MESSAGE) {
+		if (numread != sizeof(ECHODATA)) {
+			printf("message mode returned %d bytes should be %s\n",
+			       numread, sizeof(ECHODATA));
+			return -1;
+		}
+	} else {
+		if (numread != (sizeof(ECHODATA)*2)) {
+			printf("message mode returned %d bytes should be %s\n",
+			       numread, (sizeof(ECHODATA)*2));
+			return -1;
+		}
+	}
 
 	if (!ReadFile(h, outbuffer, sizeof(ECHODATA)*2, &numread, NULL)) {
 		printf("Error reading: %d\n", GetLastError());
@@ -45,4 +109,9 @@ int main(int argc, char *argv[])
 	printf("Read: %s %d\n", outbuffer, numread);
 
 	return 0;
+usage:
+	printf("Usage: %s pipename [read]\n", argv[0]);
+	printf("  Where pipename is something like \\\\servername\\NPECHO\n");
+	printf("  Where read is something 'large' or 'small'\n");
+	return -1;
 }