diff options
Diffstat (limited to 'vendor/rustix/src/backend/libc/fs/syscalls.rs')
| -rw-r--r-- | vendor/rustix/src/backend/libc/fs/syscalls.rs | 342 |
1 files changed, 304 insertions, 38 deletions
diff --git a/vendor/rustix/src/backend/libc/fs/syscalls.rs b/vendor/rustix/src/backend/libc/fs/syscalls.rs index 77b49ee3e..40c160182 100644 --- a/vendor/rustix/src/backend/libc/fs/syscalls.rs +++ b/vendor/rustix/src/backend/libc/fs/syscalls.rs @@ -1,11 +1,9 @@ //! libc syscalls supporting `rustix::fs`. use super::super::c; -use super::super::conv::{ - borrowed_fd, c_str, ret, ret_c_int, ret_off_t, ret_owned_fd, ret_ssize_t, -}; +use super::super::conv::{borrowed_fd, c_str, ret, ret_c_int, ret_off_t, ret_owned_fd, ret_usize}; #[cfg(any(target_os = "android", target_os = "linux"))] -use super::super::conv::{syscall_ret, syscall_ret_owned_fd, syscall_ret_ssize_t}; +use super::super::conv::{syscall_ret, syscall_ret_owned_fd, syscall_ret_usize}; #[cfg(any(target_os = "android", target_os = "fuchsia", target_os = "linux"))] use super::super::offset::libc_fallocate; #[cfg(not(any( @@ -38,7 +36,7 @@ use super::super::offset::{libc_fstat, libc_fstatat, libc_ftruncate, libc_lseek, target_os = "wasi", )))] use super::super::offset::{libc_fstatfs, libc_statfs}; -#[cfg(not(any(solarish, target_os = "haiku", target_os = "redox", target_os = "wasi")))] +#[cfg(not(any(target_os = "haiku", target_os = "redox", target_os = "wasi")))] use super::super::offset::{libc_fstatvfs, libc_statvfs}; #[cfg(all( any(target_arch = "arm", target_arch = "mips", target_arch = "x86"), @@ -49,8 +47,6 @@ use crate::fd::{BorrowedFd, OwnedFd}; use crate::ffi::CStr; #[cfg(apple)] use crate::ffi::CString; -#[cfg(not(solarish))] -use crate::fs::Access; #[cfg(not(any( apple, netbsdlike, @@ -87,12 +83,14 @@ use crate::fs::SealFlags; target_os = "wasi", )))] use crate::fs::StatFs; +#[cfg(any(apple, target_os = "android", target_os = "linux"))] +use crate::fs::XattrFlags; #[cfg(any(target_os = "android", target_os = "linux"))] use crate::fs::{cwd, RenameFlags, ResolveFlags, Statx, StatxFlags}; +use crate::fs::{Access, Mode, OFlags, Stat, Timestamps}; #[cfg(not(any(apple, target_os = "redox", target_os = "wasi")))] use crate::fs::{Dev, FileType}; -use crate::fs::{Mode, OFlags, Stat, Timestamps}; -#[cfg(not(any(solarish, target_os = "haiku", target_os = "redox", target_os = "wasi")))] +#[cfg(not(any(target_os = "haiku", target_os = "redox", target_os = "wasi")))] use crate::fs::{StatVfs, StatVfsMountFlags}; use crate::io::{self, SeekFrom}; #[cfg(not(target_os = "wasi"))] @@ -162,7 +160,7 @@ pub(crate) fn openat( mode: Mode, ) -> io::Result<OwnedFd> { // Work around <https://sourceware.org/bugzilla/show_bug.cgi?id=17523>. - // GLIBC versions before 2.25 don't handle `O_TMPFILE` correctly. + // glibc versions before 2.25 don't handle `O_TMPFILE` correctly. #[cfg(all(unix, target_env = "gnu"))] if oflags.contains(OFlags::TMPFILE) && crate::backend::if_glibc_is_less_than_2_25() { return openat_via_syscall(dirfd, path, oflags, mode); @@ -196,7 +194,7 @@ pub(crate) fn statfs(filename: &CStr) -> io::Result<StatFs> { } } -#[cfg(not(any(solarish, target_os = "haiku", target_os = "redox", target_os = "wasi")))] +#[cfg(not(any(target_os = "haiku", target_os = "redox", target_os = "wasi")))] #[inline] pub(crate) fn statvfs(filename: &CStr) -> io::Result<StatVfs> { unsafe { @@ -210,13 +208,12 @@ pub(crate) fn statvfs(filename: &CStr) -> io::Result<StatVfs> { #[inline] pub(crate) fn readlinkat(dirfd: BorrowedFd<'_>, path: &CStr, buf: &mut [u8]) -> io::Result<usize> { unsafe { - ret_ssize_t(c::readlinkat( + ret_usize(c::readlinkat( borrowed_fd(dirfd), c_str(path), buf.as_mut_ptr().cast::<c::c_char>(), buf.len(), )) - .map(|nread| nread as usize) } } @@ -237,14 +234,13 @@ pub(crate) fn getdents_uninit( buf: &mut [MaybeUninit<u8>], ) -> io::Result<usize> { unsafe { - syscall_ret_ssize_t(c::syscall( + syscall_ret_usize(c::syscall( c::SYS_getdents64, fd, buf.as_mut_ptr().cast::<c::c_char>(), buf.len(), )) } - .map(|nread| nread as usize) } #[cfg(not(target_os = "redox"))] @@ -402,7 +398,7 @@ fn statat_old(dirfd: BorrowedFd<'_>, path: &CStr, flags: AtFlags) -> io::Result< } } -#[cfg(not(any(solarish, target_os = "emscripten", target_os = "redox")))] +#[cfg(not(any(target_os = "emscripten", target_os = "redox")))] pub(crate) fn accessat( dirfd: BorrowedFd<'_>, path: &CStr, @@ -549,7 +545,7 @@ pub(crate) fn utimensat( flags_arg, ) != 0 { - // Translate expected errno codes into ad-hoc integer + // Translate expected `errno` codes into ad-hoc integer // values suitable for exit statuses. let code = match libc_errno::errno().0 { c::EACCES => 2, @@ -573,7 +569,8 @@ pub(crate) fn utimensat( let mut wstatus = 0; let _ = ret_c_int(c::waitpid(child_pid, &mut wstatus, 0))?; if c::WIFEXITED(wstatus) { - // Translate our ad-hoc exit statuses back to errno codes. + // Translate our ad-hoc exit statuses back to `errno` + // codes. match c::WEXITSTATUS(wstatus) { 0 => Ok(()), 2 => Err(io::Errno::ACCESS), @@ -769,7 +766,7 @@ pub(crate) fn copy_file_range( null_mut() }; let copied = unsafe { - syscall_ret_ssize_t(c::syscall( + syscall_ret_usize(c::syscall( c::SYS_copy_file_range, borrowed_fd(fd_in), off_in_ptr, @@ -785,7 +782,7 @@ pub(crate) fn copy_file_range( if let Some(off_out) = off_out { *off_out = off_out_val as u64; } - Ok(copied as usize) + Ok(copied) } #[cfg(not(any( @@ -961,23 +958,23 @@ pub(crate) fn flock(fd: BorrowedFd<'_>, operation: FlockOperation) -> io::Result #[cfg(any(target_os = "android", target_os = "linux"))] pub(crate) fn syncfs(fd: BorrowedFd<'_>) -> io::Result<()> { - unsafe { ret(c::syncfs(borrowed_fd(fd))) } -} - -#[cfg(not(any(solarish, target_os = "redox", target_os = "wasi")))] -pub(crate) fn sync() { - // TODO: Remove this when upstream libc adds `sync`. + // Some versions of Android libc lack a `syncfs` function. #[cfg(target_os = "android")] unsafe { - syscall_ret(c::syscall(c::SYS_sync)).ok(); + syscall_ret(c::syscall(c::SYS_syncfs, borrowed_fd(fd))) } #[cfg(not(target_os = "android"))] unsafe { - c::sync() + ret(c::syncfs(borrowed_fd(fd))) } } +#[cfg(not(any(target_os = "redox", target_os = "wasi")))] +pub(crate) fn sync() { + unsafe { c::sync() } +} + pub(crate) fn fstat(fd: BorrowedFd<'_>) -> io::Result<Stat> { // 32-bit and mips64 Linux: `struct stat64` is not y2038 compatible; use // `statx`. @@ -1033,7 +1030,7 @@ pub(crate) fn fstatfs(fd: BorrowedFd<'_>) -> io::Result<StatFs> { } } -#[cfg(not(any(solarish, target_os = "haiku", target_os = "redox", target_os = "wasi")))] +#[cfg(not(any(target_os = "haiku", target_os = "redox", target_os = "wasi")))] pub(crate) fn fstatvfs(fd: BorrowedFd<'_>) -> io::Result<StatVfs> { let mut statvfs = MaybeUninit::<libc_statvfs>::uninit(); unsafe { @@ -1042,7 +1039,7 @@ pub(crate) fn fstatvfs(fd: BorrowedFd<'_>) -> io::Result<StatVfs> { } } -#[cfg(not(any(solarish, target_os = "haiku", target_os = "redox", target_os = "wasi")))] +#[cfg(not(any(target_os = "haiku", target_os = "redox", target_os = "wasi")))] fn libc_statvfs_to_statvfs(from: libc_statvfs) -> StatVfs { StatVfs { f_bsize: from.f_bsize as u64, @@ -1322,13 +1319,12 @@ pub(crate) fn sendfile( count: usize, ) -> io::Result<usize> { unsafe { - let nsent = ret_ssize_t(c::sendfile64( + ret_usize(c::sendfile64( borrowed_fd(out_fd), borrowed_fd(in_fd), offset.map_or(null_mut(), crate::utils::as_mut_ptr).cast(), count, - ))?; - Ok(nsent as usize) + )) } } @@ -1525,7 +1521,7 @@ pub(crate) fn statx( // // [it's deprecated]: https://patchwork.kernel.org/project/linux-fsdevel/patch/20200505095915.11275-7-mszeredi@redhat.com/ #[cfg(not(any(target_os = "android", target_env = "musl")))] - const STATX__RESERVED: u32 = libc::STATX__RESERVED as u32; + const STATX__RESERVED: u32 = c::STATX__RESERVED as u32; #[cfg(any(target_os = "android", target_env = "musl"))] const STATX__RESERVED: u32 = linux_raw_sys::general::STATX__RESERVED; if (mask.bits() & STATX__RESERVED) == STATX__RESERVED { @@ -1638,11 +1634,11 @@ pub(crate) fn getpath(fd: BorrowedFd<'_>) -> io::Result<CString> { // instead. let mut buf = alloc::vec![0; c::PATH_MAX as usize]; - // From the [macOS `fcntl` man page]: + // From the [macOS `fcntl` manual page]: // `F_GETPATH` - Get the path of the file descriptor `Fildes`. The argument // must be a buffer of size `MAXPATHLEN` or greater. // - // [macOS `fcntl` man page]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/fcntl.2.html + // [macOS `fcntl` manual page]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/fcntl.2.html unsafe { ret(c::fcntl(borrowed_fd(fd), c::F_GETPATH, buf.as_mut_ptr()))?; } @@ -1659,7 +1655,7 @@ pub(crate) fn getpath(fd: BorrowedFd<'_>) -> io::Result<CString> { #[cfg(apple)] pub(crate) fn fcntl_rdadvise(fd: BorrowedFd<'_>, offset: u64, len: u64) -> io::Result<()> { - // From the [macOS `fcntl` man page]: + // From the [macOS `fcntl` manual page]: // `F_RDADVISE` - Issue an advisory read async with no copy to user. // // The `F_RDADVISE` command operates on the following structure which holds @@ -1672,7 +1668,7 @@ pub(crate) fn fcntl_rdadvise(fd: BorrowedFd<'_>, offset: u64, len: u64) -> io::R // }; // ``` // - // [macOS `fcntl` man page]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/fcntl.2.html + // [macOS `fcntl` manual page]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/fcntl.2.html let ra_offset = match offset.try_into() { Ok(len) => len, // If this conversion fails, the user is providing an offset outside @@ -1808,3 +1804,273 @@ pub(crate) fn mount( pub(crate) fn unmount(target: &CStr, flags: super::types::UnmountFlags) -> io::Result<()> { unsafe { ret(c::umount2(target.as_ptr(), flags.bits())) } } + +#[cfg(any(apple, target_os = "android", target_os = "linux"))] +pub(crate) fn getxattr(path: &CStr, name: &CStr, value: &mut [u8]) -> io::Result<usize> { + let value_ptr = value.as_mut_ptr(); + + #[cfg(not(apple))] + unsafe { + ret_usize(c::getxattr( + path.as_ptr(), + name.as_ptr(), + value_ptr.cast::<c::c_void>(), + value.len(), + )) + } + + #[cfg(apple)] + unsafe { + ret_usize(c::getxattr( + path.as_ptr(), + name.as_ptr(), + value_ptr.cast::<c::c_void>(), + value.len(), + 0, + 0, + )) + } +} + +#[cfg(any(apple, target_os = "android", target_os = "linux"))] +pub(crate) fn lgetxattr(path: &CStr, name: &CStr, value: &mut [u8]) -> io::Result<usize> { + let value_ptr = value.as_mut_ptr(); + + #[cfg(not(apple))] + unsafe { + ret_usize(c::lgetxattr( + path.as_ptr(), + name.as_ptr(), + value_ptr.cast::<c::c_void>(), + value.len(), + )) + } + + #[cfg(apple)] + unsafe { + ret_usize(c::getxattr( + path.as_ptr(), + name.as_ptr(), + value_ptr.cast::<c::c_void>(), + value.len(), + 0, + c::XATTR_NOFOLLOW, + )) + } +} + +#[cfg(any(apple, target_os = "android", target_os = "linux"))] +pub(crate) fn fgetxattr(fd: BorrowedFd<'_>, name: &CStr, value: &mut [u8]) -> io::Result<usize> { + let value_ptr = value.as_mut_ptr(); + + #[cfg(not(apple))] + unsafe { + ret_usize(c::fgetxattr( + borrowed_fd(fd), + name.as_ptr(), + value_ptr.cast::<c::c_void>(), + value.len(), + )) + } + + #[cfg(apple)] + unsafe { + ret_usize(c::fgetxattr( + borrowed_fd(fd), + name.as_ptr(), + value_ptr.cast::<c::c_void>(), + value.len(), + 0, + 0, + )) + } +} + +#[cfg(any(apple, target_os = "android", target_os = "linux"))] +pub(crate) fn setxattr( + path: &CStr, + name: &CStr, + value: &[u8], + flags: XattrFlags, +) -> io::Result<()> { + #[cfg(not(apple))] + unsafe { + ret(c::setxattr( + path.as_ptr(), + name.as_ptr(), + value.as_ptr().cast::<c::c_void>(), + value.len(), + flags.bits() as i32, + )) + } + + #[cfg(apple)] + unsafe { + ret(c::setxattr( + path.as_ptr(), + name.as_ptr(), + value.as_ptr().cast::<c::c_void>(), + value.len(), + 0, + flags.bits() as i32, + )) + } +} + +#[cfg(any(apple, target_os = "android", target_os = "linux"))] +pub(crate) fn lsetxattr( + path: &CStr, + name: &CStr, + value: &[u8], + flags: XattrFlags, +) -> io::Result<()> { + #[cfg(not(apple))] + unsafe { + ret(c::lsetxattr( + path.as_ptr(), + name.as_ptr(), + value.as_ptr().cast::<c::c_void>(), + value.len(), + flags.bits() as i32, + )) + } + + #[cfg(apple)] + unsafe { + ret(c::setxattr( + path.as_ptr(), + name.as_ptr(), + value.as_ptr().cast::<c::c_void>(), + value.len(), + 0, + flags.bits() as i32 | c::XATTR_NOFOLLOW, + )) + } +} + +#[cfg(any(apple, target_os = "android", target_os = "linux"))] +pub(crate) fn fsetxattr( + fd: BorrowedFd<'_>, + name: &CStr, + value: &[u8], + flags: XattrFlags, +) -> io::Result<()> { + #[cfg(not(apple))] + unsafe { + ret(c::fsetxattr( + borrowed_fd(fd), + name.as_ptr(), + value.as_ptr().cast::<c::c_void>(), + value.len(), + flags.bits() as i32, + )) + } + + #[cfg(apple)] + unsafe { + ret(c::fsetxattr( + borrowed_fd(fd), + name.as_ptr(), + value.as_ptr().cast::<c::c_void>(), + value.len(), + 0, + flags.bits() as i32, + )) + } +} + +#[cfg(any(apple, target_os = "android", target_os = "linux"))] +pub(crate) fn listxattr(path: &CStr, list: &mut [c::c_char]) -> io::Result<usize> { + #[cfg(not(apple))] + unsafe { + ret_usize(c::listxattr(path.as_ptr(), list.as_mut_ptr(), list.len())) + } + + #[cfg(apple)] + unsafe { + ret_usize(c::listxattr( + path.as_ptr(), + list.as_mut_ptr(), + list.len(), + 0, + )) + } +} + +#[cfg(any(apple, target_os = "android", target_os = "linux"))] +pub(crate) fn llistxattr(path: &CStr, list: &mut [c::c_char]) -> io::Result<usize> { + #[cfg(not(apple))] + unsafe { + ret_usize(c::llistxattr(path.as_ptr(), list.as_mut_ptr(), list.len())) + } + + #[cfg(apple)] + unsafe { + ret_usize(c::listxattr( + path.as_ptr(), + list.as_mut_ptr(), + list.len(), + c::XATTR_NOFOLLOW, + )) + } +} + +#[cfg(any(apple, target_os = "android", target_os = "linux"))] +pub(crate) fn flistxattr(fd: BorrowedFd<'_>, list: &mut [c::c_char]) -> io::Result<usize> { + let fd = borrowed_fd(fd); + + #[cfg(not(apple))] + unsafe { + ret_usize(c::flistxattr(fd, list.as_mut_ptr(), list.len())) + } + + #[cfg(apple)] + unsafe { + ret_usize(c::flistxattr(fd, list.as_mut_ptr(), list.len(), 0)) + } +} + +#[cfg(any(apple, target_os = "android", target_os = "linux"))] +pub(crate) fn removexattr(path: &CStr, name: &CStr) -> io::Result<()> { + #[cfg(not(apple))] + unsafe { + ret(c::removexattr(path.as_ptr(), name.as_ptr())) + } + + #[cfg(apple)] + unsafe { + ret(c::removexattr(path.as_ptr(), name.as_ptr(), 0)) + } +} + +#[cfg(any(apple, target_os = "android", target_os = "linux"))] +pub(crate) fn lremovexattr(path: &CStr, name: &CStr) -> io::Result<()> { + #[cfg(not(apple))] + unsafe { + ret(c::lremovexattr(path.as_ptr(), name.as_ptr())) + } + + #[cfg(apple)] + unsafe { + ret(c::removexattr( + path.as_ptr(), + name.as_ptr(), + c::XATTR_NOFOLLOW, + )) + } +} + +#[cfg(any(apple, target_os = "android", target_os = "linux"))] +pub(crate) fn fremovexattr(fd: BorrowedFd<'_>, name: &CStr) -> io::Result<()> { + let fd = borrowed_fd(fd); + + #[cfg(not(apple))] + unsafe { + ret(c::fremovexattr(fd, name.as_ptr())) + } + + #[cfg(apple)] + unsafe { + ret(c::fremovexattr(fd, name.as_ptr(), 0)) + } +} |