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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 /include/uapi/asm-generic
parent55923e4d7d195a34d3b1faaba57a5a6551e88b36 (diff)
downloadlinux-c8ffd8bcdd28296a198f237cc595148a8d4adfbe.tar.bz2
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 'include/uapi/asm-generic')
-rw-r--r--include/uapi/asm-generic/unistd.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic/unistd.h
index 3a3201e4618e..f4a01305d9a6 100644
--- a/include/uapi/asm-generic/unistd.h
+++ b/include/uapi/asm-generic/unistd.h
@@ -855,9 +855,11 @@ __SYSCALL(__NR_clone3, sys_clone3)
__SYSCALL(__NR_openat2, sys_openat2)
#define __NR_pidfd_getfd 438
__SYSCALL(__NR_pidfd_getfd, sys_pidfd_getfd)
+#define __NR_faccessat2 439
+__SYSCALL(__NR_faccessat2, sys_faccessat2)
#undef __NR_syscalls
-#define __NR_syscalls 439
+#define __NR_syscalls 440
/*
* 32 bit systems traditionally used different