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author | Christopher Speller <crspeller@gmail.com> | 2018-08-28 10:05:26 -0700 |
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committer | GitHub <noreply@github.com> | 2018-08-28 10:05:26 -0700 |
commit | 61e27beabc9804fdcf59ed9df2180802175a4f70 (patch) | |
tree | 52c86f5cdbd4e13d05b8f9dddad1a01b88e26cab /vendor/golang.org/x/sys/unix/syscall_linux.go | |
parent | 347ee1d205c95f5fd766e206cc65bfb9782a2623 (diff) | |
download | chat-61e27beabc9804fdcf59ed9df2180802175a4f70.tar.gz chat-61e27beabc9804fdcf59ed9df2180802175a4f70.tar.bz2 chat-61e27beabc9804fdcf59ed9df2180802175a4f70.zip |
Updating dependancies. (#9303)
Diffstat (limited to 'vendor/golang.org/x/sys/unix/syscall_linux.go')
-rw-r--r-- | vendor/golang.org/x/sys/unix/syscall_linux.go | 79 |
1 files changed, 70 insertions, 9 deletions
diff --git a/vendor/golang.org/x/sys/unix/syscall_linux.go b/vendor/golang.org/x/sys/unix/syscall_linux.go index 690c2c87f..eb6335402 100644 --- a/vendor/golang.org/x/sys/unix/syscall_linux.go +++ b/vendor/golang.org/x/sys/unix/syscall_linux.go @@ -61,11 +61,11 @@ func IoctlSetInt(fd int, req uint, value int) error { return ioctl(fd, req, uintptr(value)) } -func IoctlSetWinsize(fd int, req uint, value *Winsize) error { +func ioctlSetWinsize(fd int, req uint, value *Winsize) error { return ioctl(fd, req, uintptr(unsafe.Pointer(value))) } -func IoctlSetTermios(fd int, req uint, value *Termios) error { +func ioctlSetTermios(fd int, req uint, value *Termios) error { return ioctl(fd, req, uintptr(unsafe.Pointer(value))) } @@ -1288,7 +1288,11 @@ func Mount(source string, target string, fstype string, flags uintptr, data stri //sys Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error) //sys fcntl(fd int, cmd int, arg int) (val int, err error) //sys Fdatasync(fd int) (err error) +//sys Fgetxattr(fd int, attr string, dest []byte) (sz int, err error) +//sys Flistxattr(fd int, dest []byte) (sz int, err error) //sys Flock(fd int, how int) (err error) +//sys Fremovexattr(fd int, attr string) (err error) +//sys Fsetxattr(fd int, attr string, dest []byte, flags int) (err error) //sys Fsync(fd int) (err error) //sys Getdents(fd int, buf []byte) (n int, err error) = SYS_GETDENTS64 //sysnb Getpgid(pid int) (pgid int, err error) @@ -1327,6 +1331,7 @@ func Getpgrp() (pid int) { //sys read(fd int, p []byte) (n int, err error) //sys Removexattr(path string, attr string) (err error) //sys Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error) +//sys Renameat2(olddirfd int, oldpath string, newdirfd int, newpath string, flags uint) (err error) //sys RequestKey(keyType string, description string, callback string, destRingid int) (id int, err error) //sys Setdomainname(p []byte) (err error) //sys Sethostname(p []byte) (err error) @@ -1415,10 +1420,70 @@ func Vmsplice(fd int, iovs []Iovec, flags int) (int, error) { func Faccessat(dirfd int, path string, mode uint32, flags int) (err error) { if flags & ^(AT_SYMLINK_NOFOLLOW|AT_EACCESS) != 0 { return EINVAL - } else if flags&(AT_SYMLINK_NOFOLLOW|AT_EACCESS) != 0 { - return EOPNOTSUPP } - return faccessat(dirfd, path, mode) + + // The Linux kernel faccessat system call does not take any flags. + // The glibc faccessat implements the flags itself; see + // https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/unix/sysv/linux/faccessat.c;hb=HEAD + // Because people naturally expect syscall.Faccessat to act + // like C faccessat, we do the same. + + if flags == 0 { + return faccessat(dirfd, path, mode) + } + + var st Stat_t + if err := Fstatat(dirfd, path, &st, flags&AT_SYMLINK_NOFOLLOW); err != nil { + return err + } + + mode &= 7 + if mode == 0 { + return nil + } + + var uid int + if flags&AT_EACCESS != 0 { + uid = Geteuid() + } else { + uid = Getuid() + } + + if uid == 0 { + if mode&1 == 0 { + // Root can read and write any file. + return nil + } + if st.Mode&0111 != 0 { + // Root can execute any file that anybody can execute. + return nil + } + return EACCES + } + + var fmode uint32 + if uint32(uid) == st.Uid { + fmode = (st.Mode >> 6) & 7 + } else { + var gid int + if flags&AT_EACCESS != 0 { + gid = Getegid() + } else { + gid = Getgid() + } + + if uint32(gid) == st.Gid { + fmode = (st.Mode >> 3) & 7 + } else { + fmode = st.Mode & 7 + } + } + + if fmode&mode == mode { + return nil + } + + return EACCES } /* @@ -1440,11 +1505,7 @@ func Faccessat(dirfd int, path string, mode uint32, flags int) (err error) { // EpollPwait // EpollWaitOld // Execve -// Fgetxattr -// Flistxattr // Fork -// Fremovexattr -// Fsetxattr // Futex // GetKernelSyms // GetMempolicy |