From afcf3cd8ebff8fed79238a2d1b95338c4606b1ee Mon Sep 17 00:00:00 2001 From: Adhemerval Zanella Date: Thu, 10 Nov 2016 09:28:00 -0200 Subject: New internal function __access_noerrno Implement an internal version of __access called __access_noerrno that avoids setting errno. This is useful to check accessibility of files very early on in process startup i.e. before TLS setup. This allows tunables to replace MALLOC_CHECK_ safely (i.e. check existence of /etc/suid-debug to enable/disable MALLOC_CHECK) and at the same time initialize very early so that it can override IFUNCs. Checked on x86_64. * hurd/hurd.h (__hurd_fail_noerrno): New function. * include/unistd.h [IS_IN (rtld) || !defined SHARED]: Declare __access_noerrno. * io/access.c (__access_noerrno): New function. * sysdeps/mach/hurd/access.c (hurd_fail_seterrno): New function. (hurd_fail_seterrno): Likewise. (access_common): Likewise. (__access_noerrno): Likewise. * sysdeps/nacl/access.c (__access_noerrno): Likewise. * sysdeps/unix/sysv/linux/access.c (__access_noerrno): Likewise. * sysdeps/nacl/nacl-interfaces.h (NACL_CALL_NOERRNO): New macro. --- hurd/hurd.h | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) (limited to 'hurd') diff --git a/hurd/hurd.h b/hurd/hurd.h index ec07827..c089d4c 100644 --- a/hurd/hurd.h +++ b/hurd/hurd.h @@ -75,6 +75,35 @@ __hurd_fail (error_t err) errno = err; return -1; } + +_HURD_H_EXTERN_INLINE int +__hurd_fail_noerrno (error_t err) +{ + switch (err) + { + case EMACH_SEND_INVALID_DEST: + case EMIG_SERVER_DIED: + /* The server has disappeared! */ + err = EIEIO; + break; + + case KERN_NO_SPACE: + err = ENOMEM; + break; + + case KERN_INVALID_ARGUMENT: + err = EINVAL; + break; + + case 0: + return 0; + + default: + break; + } + + return -1; +} /* Basic ports and info, initialized by startup. */ -- cgit v1.1