An app execution alias cannot be opened for read (CreateFile() with GENERIC_READ fails with ERROR_CANT_ACCESS_FILE) because it does not resolve the reparse point. Therefore, we need to know if the path is an app execution alias when opening it.
This patch adds new api path_conv::is_app_execution_alias() for that purpose. Reviewed-by: Signed-off-by: Takashi Yano <[email protected]> --- winsup/cygwin/local_includes/path.h | 5 +++++ winsup/cygwin/path.cc | 2 +- 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/winsup/cygwin/local_includes/path.h b/winsup/cygwin/local_includes/path.h index a9ce2c7e4..ad142ddd3 100644 --- a/winsup/cygwin/local_includes/path.h +++ b/winsup/cygwin/local_includes/path.h @@ -79,6 +79,7 @@ enum path_types PATH_SOCKET = _BIT ( 5), /* AF_UNIX socket file */ PATH_RESOLVE_PROCFD = _BIT ( 6), /* fd symlink via /proc */ PATH_REP_NOAPI = _BIT ( 7), /* rep. point unknown to WinAPI */ + PATH_APPEXECLINK = _BIT ( 8), /* rep. point app execution alias */ PATH_DONT_USE = _BIT (31) /* conversion to signed happens. */ }; @@ -214,6 +215,10 @@ class path_conv { return (path_flags & (PATH_REP | PATH_REP_NOAPI)) == PATH_REP; } + int is_app_execution_alias () const + { + return path_flags & PATH_APPEXECLINK; + } int isfifo () const {return dev.is_device (FH_FIFO);} int iscygdrive () const {return dev.is_device (FH_CYGDRIVE);} diff --git a/winsup/cygwin/path.cc b/winsup/cygwin/path.cc index 710775e38..625e60686 100644 --- a/winsup/cygwin/path.cc +++ b/winsup/cygwin/path.cc @@ -2661,7 +2661,7 @@ check_reparse_point_target (HANDLE h, bool remote, PREPARSE_DATA_BUFFER rp, if (i == 2 && n > 0 && n < size) { RtlInitCountedUnicodeString (psymbuf, buf, n * sizeof (WCHAR)); - return PATH_SYMLINK | PATH_REP; + return PATH_SYMLINK | PATH_REP | PATH_APPEXECLINK; } if (i == 2) break; -- 2.51.0
