From 988df03f8a293f7aa1d6bb872b981c5dfc6493d9 Mon Sep 17 00:00:00 2001
From: xujing <xujing125@huawei.com>
Date: Tue, 8 Nov 2022 10:36:36 +0800
Subject: [PATCH] rpm: fix rpm is blocked when open fifo file

---
 lib/fsm.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/lib/fsm.c b/lib/fsm.c
index c9ab3e1..c1c86b0 100644
--- a/lib/fsm.c
+++ b/lib/fsm.c
@@ -1137,8 +1137,13 @@ int rpmPackageFilesInstall(rpmts ts, rpmte te, rpmfiles files,
 
 	    if (!rc && fd == -1 && !S_ISLNK(fp->sb.st_mode)) {
 		/* Only follow safe symlinks, and never on temporary files */
-		fd = fsmOpenat(di.dirfd, fp->fpath,
-				fp->suffix ? AT_SYMLINK_NOFOLLOW : 0);
+		int flags = fp->suffix ? AT_SYMLINK_NOFOLLOW : 0;
+
+		/* Open the FIFO file in O_RDWR mode to prevent process blocking */
+		if (S_ISFIFO(fp->sb.st_mode))
+		    flags |= O_RDWR;
+
+		fd = fsmOpenat(di.dirfd, fp->fpath, flags);
 		if (fd < 0)
 		    rc = RPMERR_OPEN_FAILED;
 	    }
-- 
2.27.0

