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* fhandler.cc (fhandler_disk_file::fstat): Always reset file position

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to original value after checking for executable magic.
This commit is contained in:
Corinna Vinschen 2001-06-05 09:21:39 +00:00
parent 2c1296f856
commit fa821be37b
2 changed files with 20 additions and 8 deletions
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5
winsup/cygwin/ChangeLog
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@ -1,3 +1,8 @@
Tue Jun 5 11:18:00 2001 Corinna Vinschen <corinna@vinschen.de>
* fhandler.cc (fhandler_disk_file::fstat): Always reset file position
to original value after checking for executable magic.
Mon Jun 4 16:21:00 2001 Corinna Vinschen <corinna@vinschen.de> Mon Jun 4 16:21:00 2001 Corinna Vinschen <corinna@vinschen.de>
* cygheap.h (cygheap_user::cygheap_user): Initialize token to * cygheap.h (cygheap_user::cygheap_user): Initialize token to

23
winsup/cygwin/fhandler.cc
View File

@ -974,16 +974,23 @@ fhandler_disk_file::fstat (struct stat *buf)
buf->st_mode |= S_IFREG; buf->st_mode |= S_IFREG;
if (!dont_care_if_execable () && !get_execable_p ()) if (!dont_care_if_execable () && !get_execable_p ())
{ {
DWORD done; DWORD cur, done;
char magic[3]; char magic[3];
/* FIXME should we use /etc/magic ? */
magic[0] = magic[1] = magic[2] = '\0'; /* First retrieve current position, set to beginning
if (ReadFile (get_handle (), magic, 3, &done, 0) of file if not already there. */
&& done == 3) 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)) /* FIXME should we use /etc/magic ? */
set_execable_p (); magic[0] = magic[1] = magic[2] = '\0';
SetFilePointer (get_handle(), -(LONG) done, NULL, FILE_CURRENT); 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 ()) if (get_execable_p ())