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* syscalls.cc (stat_worker): Add a check for the special case when 

a process creates a file using mode 000 using ntsec.
This commit is contained in:
Corinna Vinschen 2001-02-06 14:07:02 +00:00
parent 31f5feea33
commit d7ed877ba3
2 changed files with 46 additions and 17 deletions
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5
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,8 @@
Tue Feb 6 15:04:00 2001 Corinna Vinschen <corinna@vinschen.de>
* syscalls.cc (stat_worker): Add a check for the special case when
a process creates a file using mode 000 using ntsec.
Mon Feb 5 17:00:00 2001 Corinna Vinschen <corinna@vinschen.de>
* fhandler.cc (fhandler_base::open): Always add GENERIC_READ access

58
winsup/cygwin/syscalls.cc
View File

@ -1027,6 +1027,11 @@ stat_worker (const char *caller, const char *name, struct stat *buf,
int res = -1;
int oret = 1;
int atts;
int attribute = 0;
uid_t uid;
gid_t gid;
char root[MAX_PATH];
UINT dtype;
fhandler_disk_file fh (NULL);
@ -1060,25 +1065,44 @@ stat_worker (const char *caller, const char *name, struct stat *buf,
if ((atts == -1 || !(atts & FILE_ATTRIBUTE_DIRECTORY) ||
(os_being_run == winNT
&& dtype != DRIVE_NO_ROOT_DIR
&& dtype != DRIVE_UNKNOWN))
&& (oret = fh.open (real_path, O_RDONLY | O_BINARY | O_DIROPEN |
(nofollow ? O_NOSYMLINK : 0), 0)))
&& dtype != DRIVE_UNKNOWN)))
{
res = fh.fstat (buf);
fh.close ();
/* The number of links to a directory includes the
number of subdirectories in the directory, since all
those subdirectories point to it.
This is too slow on remote drives, so we do without it and
set the number of links to 2. */
/* Unfortunately the count of 2 confuses `find(1)' command. So
let's try it with `1' as link count. */
if (atts != -1 && (atts & FILE_ATTRIBUTE_DIRECTORY))
buf->st_nlink =
(dtype == DRIVE_REMOTE ? 1 : num_entries (real_path.get_win32 ()));
oret = fh.open (real_path, O_RDONLY | O_BINARY | O_DIROPEN |
(nofollow ? O_NOSYMLINK : 0), 0);
/* Check a special case here. If ntsec is ON it happens
that a process creates a file using mode 000 to disallow
other processes access. In contrast to UNIX, this results
in a failing open call in the same process. Check that
case. */
if (!oret && allow_ntsec && get_errno () == EACCES
&& !get_file_attribute (TRUE, real_path, &attribute, &uid, &gid)
&& !attribute && uid == myself->uid && gid == myself->gid)
{
set_file_attribute (TRUE, real_path, 0400);
oret = fh.open (real_path, O_RDONLY | O_BINARY | O_DIROPEN |
(nofollow ? O_NOSYMLINK : 0), 0);
set_file_attribute (TRUE, real_path.get_win32 (), 0);
}
if (oret)
{
res = fh.fstat (buf);
fh.close ();
/* The number of links to a directory includes the
number of subdirectories in the directory, since all
those subdirectories point to it.
This is too slow on remote drives, so we do without it and
set the number of links to 2. */
/* Unfortunately the count of 2 confuses `find(1)' command. So
let's try it with `1' as link count. */
if (atts != -1 && (atts & FILE_ATTRIBUTE_DIRECTORY))
buf->st_nlink = (dtype == DRIVE_REMOTE
? 1
: num_entries (real_path.get_win32 ()));
goto done;
}
}
else if (atts != -1 || (!oret && get_errno () != ENOENT
&& get_errno () != ENOSHARE))
if (atts != -1 || (!oret && get_errno () != ENOENT
&& get_errno () != ENOSHARE))
{
/* Unfortunately, the above open may fail if the file exists, though.
So we have to care for this case here, too. */