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Cygwin: path_conv: add PATH_RESOLVE_PROCFD path_types flag

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path_conv now sets the PATH_RESOLVE_PROCFD flag in path_flags if
the PC_SYM_NOFOLLOW_PROCFD pathconv_arg flag has been set on input
*and* the file is actually a proc fd symlink.

Add matching path_conv::follow_fd_symlink method for checking and
use it in open(2).

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This commit is contained in:
Corinna Vinschen
2019-01-06 20:13:52 +01:00
parent c1023ee353
commit ba12614f79
3 changed files with 10 additions and 5 deletions
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5
winsup/cygwin/path.cc
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@@ -850,7 +850,10 @@ path_conv::check (const char *src, unsigned opt,
case virt_fdsymlink:
/* Allow open/linkat to do the right thing. */
if (opt & PC_SYM_NOFOLLOW_PROCFD)
opt &= ~PC_SYM_FOLLOW;
{
opt &= ~PC_SYM_FOLLOW;
sym.path_flags |= PATH_RESOLVE_PROCFD;
}
/*FALLTHRU*/
case virt_symlink:
goto is_virtual_symlink;