From: Hilko Bengen <bengen@debian.org>
Date: Sat, 3 Jan 2026 14:05:07 +0000 (+0100)
Subject: Wait for device name to appearr before mount, mkfs
X-Git-Tag: archive/raspbian/1%1.56.2-6+rpi1~1^2~1
X-Git-Url: https://dgit.raspbian.org/%22http:/www.example.com/cgi/%22https://%22Program/%22http:/www.example.com/cgi/%22https:/%22Program?a=commitdiff_plain;h=937b3ddcbb39bf8fa93a6f4bb78746df2ecb7a94;p=libguestfs.git

Wait for device name to appearr before mount, mkfs


Gbp-Pq: Name Wait-for-device-name-to-appearr-before-mount-mkfs.patch
---

diff --git a/daemon/mkfs.c b/daemon/mkfs.c
index fe2e6781..66c937be 100644
--- a/daemon/mkfs.c
+++ b/daemon/mkfs.c
@@ -52,6 +52,14 @@ do_mkfs (const char *fstype, const char *device, int blocksize,
   CLEANUP_FREE char *err = NULL;
   int extfs = 0;
 
+  /* Wait up to 15s for device to appear */
+  for (int j=0; i < 150; i++) {
+    if (!access (device, F_OK)) {
+      break;
+    }
+    usleep(100000);
+  }
+
   if (fstype_is_extfs (fstype))
     extfs = 1;
 
diff --git a/daemon/mount.ml b/daemon/mount.ml
index 171bea10..2f74555d 100644
--- a/daemon/mount.ml
+++ b/daemon/mount.ml
@@ -30,6 +30,18 @@ let mount_vfs options vfs mountable mountpoint =
 
   let args = ref [] in
 
+  (* Wait up to 15s for device to appear *)
+  (match mountable.m_type with
+  | MountableDevice | MountablePath ->
+    if String.starts_with "/dev/" mountable.m_device then
+      let i = ref 0 in
+      while (not (Sys.file_exists mountable.m_device)) && (!i < 150) do
+        Unix.sleepf 0.1;
+        i := !i + 1;
+      done
+  | _ -> ()
+  );
+
   (* -o options *)
   (match options, mountable.m_type with
    | "", (MountableDevice | MountablePath) -> ()