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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2016-11-10 09:28:00 -0200 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2016-11-16 15:53:58 -0200 |
| commit | afcf3cd8ebff8fed79238a2d1b95338c4606b1ee (patch) | |
| tree | 0e21226d1c0fac1db0af0c829c093d59b121eb85 /io | |
| parent | 530862a63e0929128dc98fbbd463b120934434fb (diff) | |
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.
Diffstat (limited to 'io')
| -rw-r--r-- | io/access.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/io/access.c b/io/access.c index 45347048af..859cf75e30 100644 --- a/io/access.c +++ b/io/access.c @@ -19,6 +19,13 @@ #include <stddef.h> #include <unistd.h> +/* Test for access to FILE without setting errno. */ +int +__access_noerrno (const char *file, int type) +{ + return -1; +} + /* Test for access to FILE. */ int __access (const char *file, int type) |