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Cygwin: open: cleanup code in preparation of O_TMPFILE 

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This commit is contained in:
Corinna Vinschen 2017-11-14 16:28:44 +01:00
parent 9cf0c4a012
commit f94fe74aad
1 changed files with 55 additions and 57 deletions
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112
winsup/cygwin/syscalls.cc
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@ -1361,6 +1361,7 @@ open (const char *unix_path, int flags, ...)
int res = -1;
va_list ap;
mode_t mode = 0;
fhandler_base *fh = NULL;
pthread_testcancel ();
@ -1368,69 +1369,66 @@ open (const char *unix_path, int flags, ...)
{
syscall_printf ("open(%s, %y)", unix_path, flags);
if (!*unix_path)
set_errno (ENOENT);
else
{
/* check for optional mode argument */
va_start (ap, flags);
mode = va_arg (ap, mode_t);
va_end (ap);
fhandler_base *fh;
cygheap_fdnew fd;
if (fd >= 0)
{
/* This is a temporary kludge until all utilities can catch up
with a change in behavior that implements linux functionality:
opening a tty should not automatically cause it to become the
controlling tty for the process. */
int opt = PC_OPEN | ((flags & (O_NOFOLLOW | O_EXCL))
? PC_SYM_NOFOLLOW : PC_SYM_FOLLOW);
if (!(flags & O_NOCTTY) && fd > 2 && myself->ctty != -2)
{
flags |= O_NOCTTY;
/* flag that, if opened, this fhandler could later be capable
of being a controlling terminal if /dev/tty is opened. */
opt |= PC_CTTY;
}
if (!(fh = build_fh_name (unix_path, opt, stat_suffixes)))
; // errno already set
else if ((flags & O_NOFOLLOW) && fh->issymlink ())
{
delete fh;
set_errno (ELOOP);
}
else if ((flags & O_DIRECTORY) && fh->exists ()
&& !fh->pc.isdir ())
{
delete fh;
set_errno (ENOTDIR);
}
else if (((flags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
&& fh->exists ())
{
delete fh;
set_errno (EEXIST);
}
else if ((fh->is_fs_special ()
&& fh->device_access_denied (flags))
|| !fh->open_with_arch (flags, mode & 07777))
delete fh;
else
{
fd = fh;
if (fd <= 2)
set_std_handle (fd);
res = fd;
}
}
set_errno (ENOENT);
__leave;
}
syscall_printf ("%R = open(%s, %y)", res, unix_path, flags);
/* check for optional mode argument */
va_start (ap, flags);
mode = va_arg (ap, mode_t);
va_end (ap);
cygheap_fdnew fd;
if (fd < 0)
__leave; /* errno already set */
/* This is a temporary kludge until all utilities can catch up
with a change in behavior that implements linux functionality:
opening a tty should not automatically cause it to become the
controlling tty for the process. */
int opt = PC_OPEN | ((flags & (O_NOFOLLOW | O_EXCL))
? PC_SYM_NOFOLLOW : PC_SYM_FOLLOW);
if (!(flags & O_NOCTTY) && fd > 2 && myself->ctty != -2)
{
flags |= O_NOCTTY;
/* flag that, if opened, this fhandler could later be capable
of being a controlling terminal if /dev/tty is opened. */
opt |= PC_CTTY;
}
if (!(fh = build_fh_name (unix_path, opt, stat_suffixes)))
__leave; /* errno already set */
if ((flags & O_NOFOLLOW) && fh->issymlink ())
{
set_errno (ELOOP);
__leave;
}
if ((flags & O_DIRECTORY) && fh->exists () && !fh->pc.isdir ())
{
set_errno (ENOTDIR);
__leave;
}
if (((flags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) && fh->exists ())
{
set_errno (EEXIST);
__leave;
}
if ((fh->is_fs_special () && fh->device_access_denied (flags))
|| !fh->open_with_arch (flags, mode & 07777))
__leave; /* errno already set */
fd = fh;
if (fd <= 2)
set_std_handle (fd);
res = fd;
}
__except (EFAULT) {}
__endtry
if (res < 0 && fh)
delete fh;
syscall_printf ("%R = open(%s, %y)", res, unix_path, flags);
return res;
}