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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 /include | |
| parent | 530862a63e0929128dc98fbbd463b120934434fb (diff) | |
| download | glibc-afcf3cd8ebff8fed79238a2d1b95338c4606b1ee.tar.gz glibc-afcf3cd8ebff8fed79238a2d1b95338c4606b1ee.tar.xz glibc-afcf3cd8ebff8fed79238a2d1b95338c4606b1ee.zip | |
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 'include')
| -rw-r--r-- | include/unistd.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/unistd.h b/include/unistd.h index d2802b2b3e..6144f411aa 100644 --- a/include/unistd.h +++ b/include/unistd.h @@ -181,6 +181,12 @@ extern int __getlogin_r_loginuid (char *name, size_t namesize) # include <dl-unistd.h> # endif +# if IS_IN (rtld) || !defined SHARED +/* __access variant that does not set errno. Used in very early initialization + code in libc.a and ld.so. */ +extern __typeof (__access) __access_noerrno attribute_hidden; +# endif + __END_DECLS # endif |