On Windows, make pg_dump use binary mode for compressed plain text output.

tglsfdc · tglsfdc · commit d063f972d23a · 2017-06-19T11:03:11.000-04:00
The combination of -Z -Fp and output to stdout resulted in corrupted output data, because we left stdout in text mode, resulting in newline conversion being done on the compressed stream. Switch stdout to binary mode for this case, at the same place where we do it for non-text output formats. Report and patch by Kuntal Ghosh, tested by Ashutosh Sharma and Neha Sharma. Back-patch to all supported branches. Discussion: https://postgr.es/m/CAGz5QCJPvbBjXAmJuGx1B_41yVCetAJhp7rtaDf7XQGWuB1GSw@mail.gmail.com
diff --git a/src/bin/pg_dump/pg_backup_archiver.c b/src/bin/pg_dump/pg_backup_archiver.c
@@ -2215,12 +2215,12 @@ _allocAH(const char *FileSpec, const ArchiveFormat fmt,
 	AH->OF = stdout;
 
 	/*
-	 * On Windows, we need to use binary mode to read/write non-text archive
-	 * formats.  Force stdin/stdout into binary mode if that is what we are
-	 * using.
+	 * On Windows, we need to use binary mode to read/write non-text files,
+	 * which include all archive formats as well as compressed plain text.
+	 * Force stdin/stdout into binary mode if that is what we are using.
 	 */
 #ifdef WIN32
-	if (fmt != archNull &&
+	if ((fmt != archNull || compression != 0) &&
 		(AH->fSpec == NULL || strcmp(AH->fSpec, "") == 0))
 	{
 		if (mode == archModeWrite)
