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| author | Corinna Vinschen <corinna@vinschen.de> | 2001-06-05 09:21:39 +0000 |
|---|---|---|
| committer | Corinna Vinschen <corinna@vinschen.de> | 2001-06-05 09:21:39 +0000 |
| commit | fa821be37b56798f70b488530a07adeb2092b69b (patch) | |
| tree | 7b998e8c103a40a6b6f390fe72e6842b9924d1ee /winsup/cygwin/fhandler.cc | |
| parent | 2c1296f8565c55177449fbae7cc365700726a890 (diff) | |
| download | cygnal-fa821be37b56798f70b488530a07adeb2092b69b.tar.gz cygnal-fa821be37b56798f70b488530a07adeb2092b69b.tar.bz2 cygnal-fa821be37b56798f70b488530a07adeb2092b69b.zip | |
* fhandler.cc (fhandler_disk_file::fstat): Always reset file position
to original value after checking for executable magic.
Diffstat (limited to 'winsup/cygwin/fhandler.cc')
| -rw-r--r-- | winsup/cygwin/fhandler.cc | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/winsup/cygwin/fhandler.cc b/winsup/cygwin/fhandler.cc index 15e0e2303..5c613bccd 100644 --- a/winsup/cygwin/fhandler.cc +++ b/winsup/cygwin/fhandler.cc @@ -974,16 +974,23 @@ fhandler_disk_file::fstat (struct stat *buf) buf->st_mode |= S_IFREG; if (!dont_care_if_execable () && !get_execable_p ()) { - DWORD done; + DWORD cur, done; char magic[3]; - /* FIXME should we use /etc/magic ? */ - magic[0] = magic[1] = magic[2] = '\0'; - if (ReadFile (get_handle (), magic, 3, &done, 0) - && done == 3) + + /* First retrieve current position, set to beginning + of file if not already there. */ + cur = SetFilePointer (get_handle(), 0, NULL, FILE_CURRENT); + if (cur != INVALID_SET_FILE_POINTER && + (!cur || + SetFilePointer (get_handle(), 0, NULL, FILE_BEGIN) + != INVALID_SET_FILE_POINTER)) { - if (has_exec_chars (magic, done)) - set_execable_p (); - SetFilePointer (get_handle(), -(LONG) done, NULL, FILE_CURRENT); + /* FIXME should we use /etc/magic ? */ + magic[0] = magic[1] = magic[2] = '\0'; + if (ReadFile (get_handle (), magic, 3, &done, 0) && + done == 3 && has_exec_chars (magic, done)) + set_execable_p (); + SetFilePointer (get_handle(), cur, NULL, FILE_BEGIN); } } if (get_execable_p ()) |