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authorMiklos Szeredi <mszeredi@redhat.com>2020-05-14 16:44:25 +0200
committerMiklos Szeredi <mszeredi@redhat.com>2020-05-14 16:44:25 +0200
commitc8ffd8bcdd28296a198f237cc595148a8d4adfbe (patch)
tree71ce857ad8d9feea14cfe9619013e84a88bb374c /fs/internal.h
parent55923e4d7d195a34d3b1faaba57a5a6551e88b36 (diff)
vfs: add faccessat2 syscall
POSIX defines faccessat() as having a fourth "flags" argument, while the linux syscall doesn't have it. Glibc tries to emulate AT_EACCESS and AT_SYMLINK_NOFOLLOW, but AT_EACCESS emulation is broken. Add a new faccessat(2) syscall with the added flags argument and implement both flags. The value of AT_EACCESS is defined in glibc headers to be the same as AT_REMOVEDIR. Use this value for the kernel interface as well, together with the explanatory comment. Also add AT_EMPTY_PATH support, which is not documented by POSIX, but can be useful and is trivial to implement. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'fs/internal.h')
-rw-r--r--fs/internal.h1
1 files changed, 0 insertions, 1 deletions
diff --git a/fs/internal.h b/fs/internal.h
index aa5d45524e87..0d467e32dd7e 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -126,7 +126,6 @@ extern struct open_how build_open_how(int flags, umode_t mode);
extern int build_open_flags(const struct open_how *how, struct open_flags *op);
long do_sys_ftruncate(unsigned int fd, loff_t length, int small);
-long do_faccessat(int dfd, const char __user *filename, int mode);
int do_fchmodat(int dfd, const char __user *filename, umode_t mode);
int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group,
int flag);