https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=b940faa144cae9cd29295d8fdaac163a17f334cc
commit b940faa144cae9cd29295d8fdaac163a17f334cc
Author: Corinna Vinschen <cori...@vinschen.de>
AuthorDate: Mon Jan 27 11:01:29 2025 +0100
Commit: Corinna Vinschen <cori...@vinschen.de>
CommitDate: Mon Jan 27 11:17:27 2025 +0100
Cygwin: message queues are not devices
Message queues are basically just files and in most cases can be handled
like normal files. So it was a mistake to set the "on-disk-device" flag
for them to fix the mq_unlink() problem reported in
https://cygwin.com/pipermail/cygwin/2025-January/257119.html
Rather, given that unlink() just checks if the object to be deleted
has an on-disk representation, make sure message queues are added to
the path_conv::isondisk() predicate.
This also reverts commit d870655f570f25393dcefbaf0b1dc807f277749c.
Fixes: d870655f570f ("Cygwin: path_conv: set on-disk-device flag for
message queue files")
Reported-by: Christian Franke <christian.fra...@t-online.de>
Signed-off-by: Corinna Vinschen <cori...@vinschen.de>
Diff:
---
winsup/cygwin/local_includes/devices.h | 3 ++-
winsup/cygwin/local_includes/path.h | 3 +--
winsup/cygwin/path.cc | 5 +----
winsup/cygwin/release/3.5.7 | 5 +++++
4 files changed, 9 insertions(+), 7 deletions(-)
diff --git a/winsup/cygwin/local_includes/devices.h
b/winsup/cygwin/local_includes/devices.h
index c4f06127418c..dc4a29b12b8e 100644
--- a/winsup/cygwin/local_includes/devices.h
+++ b/winsup/cygwin/local_includes/devices.h
@@ -376,7 +376,8 @@ public:
}
fh_devices operator = (fh_devices n) {return d.devn_fh_devices = n;}
inline void setfs (bool x) {dev_on_fs = x;}
- inline bool isfs () const {return dev_on_fs || d.devn == FH_FS;}
+ inline bool isfs () const {return dev_on_fs || d.devn == FH_FS
+ || d.devn == FH_MQUEUE;}
inline bool is_fs_special () const {return dev_on_fs && d.devn != FH_FS;}
inline bool is_dev_resident () const {return lives_in_dev;}
inline int exists () const {return exists_func (*this);}
diff --git a/winsup/cygwin/local_includes/path.h
b/winsup/cygwin/local_includes/path.h
index 924c93eed006..1fd542c96b4a 100644
--- a/winsup/cygwin/local_includes/path.h
+++ b/winsup/cygwin/local_includes/path.h
@@ -235,8 +235,7 @@ class path_conv
/proc. */
int isspecial () const {return dev.not_device (FH_FS);}
/* Devices with representation on disk. This includes local sockets, FIFOs,
- message queues and devices created with mknod. It does not include
- the /proc hierarchy. */
+ devices created with mknod. It does not include the /proc hierarchy. */
int is_fs_special () const {return dev.is_fs_special ();}
/* Like is_fs_special but excluding local sockets. */
int is_lnk_special () const {return is_fs_special () && !issocket ();}
diff --git a/winsup/cygwin/path.cc b/winsup/cygwin/path.cc
index c10f2e8e1bd8..658f3f9cf7ea 100644
--- a/winsup/cygwin/path.cc
+++ b/winsup/cygwin/path.cc
@@ -1273,10 +1273,7 @@ path_conv::check (const char *src, unsigned opt,
/* FIXME: bad hack alert!!! We need a better solution */
if (!strncmp (path_copy, MQ_PATH, MQ_LEN) && path_copy[MQ_LEN])
- {
- dev.parse (FH_MQUEUE);
- dev.setfs (1);
- }
+ dev.parse (FH_MQUEUE);
}
if (opt & PC_NOFULL)
diff --git a/winsup/cygwin/release/3.5.7 b/winsup/cygwin/release/3.5.7
new file mode 100644
index 000000000000..12180efd9a82
--- /dev/null
+++ b/winsup/cygwin/release/3.5.7
@@ -0,0 +1,5 @@
+Fixes:
+------
+
+- Fix stat() on message queues.
+ Addresses: https://cygwin.com/pipermail/cygwin/2025-January/257186.html
