| //! Automatically enable “large file” support features. |
| |
| #[cfg(not(windows))] |
| use super::c; |
| |
| #[cfg(not(any(linux_like, windows)))] |
| #[cfg(feature = "fs")] |
| pub(super) use c::{ |
| fstat as libc_fstat, fstatat as libc_fstatat, ftruncate as libc_ftruncate, lseek as libc_lseek, |
| off_t as libc_off_t, |
| }; |
| |
| #[cfg(linux_like)] |
| #[cfg(feature = "fs")] |
| pub(super) use c::{ |
| fstat64 as libc_fstat, fstatat64 as libc_fstatat, ftruncate64 as libc_ftruncate, |
| lseek64 as libc_lseek, off64_t as libc_off_t, |
| }; |
| |
| #[cfg(linux_like)] |
| pub(super) use c::rlimit64 as libc_rlimit; |
| |
| #[cfg(not(any(linux_like, windows, target_os = "wasi")))] |
| #[cfg(feature = "mm")] |
| pub(super) use c::mmap as libc_mmap; |
| |
| #[cfg(not(any( |
| linux_like, |
| windows, |
| target_os = "fuchsia", |
| target_os = "redox", |
| target_os = "wasi", |
| )))] |
| pub(super) use c::{rlimit as libc_rlimit, RLIM_INFINITY as LIBC_RLIM_INFINITY}; |
| |
| #[cfg(not(any(linux_like, windows, target_os = "fuchsia", target_os = "wasi")))] |
| pub(super) use c::{getrlimit as libc_getrlimit, setrlimit as libc_setrlimit}; |
| |
| // TODO: Add `RLIM64_INFINITY` to upstream libc. |
| #[cfg(linux_like)] |
| pub(super) const LIBC_RLIM_INFINITY: u64 = !0_u64; |
| |
| #[cfg(linux_like)] |
| pub(super) use c::{getrlimit64 as libc_getrlimit, setrlimit64 as libc_setrlimit}; |
| |
| #[cfg(linux_like)] |
| #[cfg(feature = "mm")] |
| pub(super) use c::mmap64 as libc_mmap; |
| |
| // `prlimit64` wasn't supported in glibc until 2.13. |
| #[cfg(all(target_os = "linux", target_env = "gnu"))] |
| weak_or_syscall! { |
| fn prlimit64( |
| pid: c::pid_t, |
| resource: c::__rlimit_resource_t, |
| new_limit: *const c::rlimit64, |
| old_limit: *mut c::rlimit64 |
| ) via SYS_prlimit64 -> c::c_int |
| } |
| #[cfg(all(target_os = "linux", target_env = "musl"))] |
| weak_or_syscall! { |
| fn prlimit64( |
| pid: c::pid_t, |
| resource: c::c_int, |
| new_limit: *const c::rlimit64, |
| old_limit: *mut c::rlimit64 |
| ) via SYS_prlimit64 -> c::c_int |
| } |
| #[cfg(target_os = "android")] |
| weak_or_syscall! { |
| fn prlimit64( |
| pid: c::pid_t, |
| resource: c::c_int, |
| new_limit: *const c::rlimit64, |
| old_limit: *mut c::rlimit64 |
| ) via SYS_prlimit64 -> c::c_int |
| } |
| #[cfg(all(target_os = "linux", target_env = "gnu"))] |
| pub(super) unsafe fn libc_prlimit( |
| pid: c::pid_t, |
| resource: c::__rlimit_resource_t, |
| new_limit: *const c::rlimit64, |
| old_limit: *mut c::rlimit64, |
| ) -> c::c_int { |
| prlimit64(pid, resource, new_limit, old_limit) |
| } |
| #[cfg(all(target_os = "linux", target_env = "musl"))] |
| pub(super) unsafe fn libc_prlimit( |
| pid: c::pid_t, |
| resource: c::c_int, |
| new_limit: *const c::rlimit64, |
| old_limit: *mut c::rlimit64, |
| ) -> c::c_int { |
| prlimit64(pid, resource, new_limit, old_limit) |
| } |
| #[cfg(target_os = "android")] |
| pub(super) unsafe fn libc_prlimit( |
| pid: c::pid_t, |
| resource: c::c_int, |
| new_limit: *const c::rlimit64, |
| old_limit: *mut c::rlimit64, |
| ) -> c::c_int { |
| prlimit64(pid, resource, new_limit, old_limit) |
| } |
| |
| #[cfg(not(any(linux_like, windows, target_os = "redox")))] |
| #[cfg(feature = "fs")] |
| pub(super) use c::openat as libc_openat; |
| #[cfg(linux_like)] |
| #[cfg(feature = "fs")] |
| pub(super) use c::openat64 as libc_openat; |
| |
| #[cfg(target_os = "fuchsia")] |
| #[cfg(feature = "fs")] |
| pub(super) use c::fallocate as libc_fallocate; |
| #[cfg(any(target_os = "android", target_os = "linux"))] |
| #[cfg(feature = "fs")] |
| pub(super) use c::fallocate64 as libc_fallocate; |
| #[cfg(not(any( |
| apple, |
| linux_like, |
| netbsdlike, |
| solarish, |
| windows, |
| target_os = "dragonfly", |
| target_os = "haiku", |
| target_os = "redox", |
| )))] |
| #[cfg(feature = "fs")] |
| pub(super) use c::posix_fadvise as libc_posix_fadvise; |
| #[cfg(linux_like)] |
| #[cfg(feature = "fs")] |
| pub(super) use c::posix_fadvise64 as libc_posix_fadvise; |
| |
| #[cfg(all(not(any( |
| windows, |
| target_os = "android", |
| target_os = "linux", |
| target_os = "emscripten", |
| ))))] |
| pub(super) use c::{pread as libc_pread, pwrite as libc_pwrite}; |
| #[cfg(any(target_os = "android", target_os = "linux", target_os = "emscripten"))] |
| pub(super) use c::{pread64 as libc_pread, pwrite64 as libc_pwrite}; |
| #[cfg(not(any( |
| apple, |
| windows, |
| target_os = "android", |
| target_os = "emscripten", |
| target_os = "haiku", |
| target_os = "linux", |
| target_os = "redox", |
| target_os = "solaris", |
| )))] |
| pub(super) use c::{preadv as libc_preadv, pwritev as libc_pwritev}; |
| #[cfg(any(target_os = "linux", target_os = "emscripten"))] |
| pub(super) use c::{preadv64 as libc_preadv, pwritev64 as libc_pwritev}; |
| |
| #[cfg(target_os = "android")] |
| mod readwrite_pv64 { |
| use super::c; |
| |
| // 64-bit offsets on 32-bit platforms are passed in endianness-specific |
| // lo/hi pairs. See src/backend/linux_raw/conv.rs for details. |
| #[cfg(all(target_endian = "little", target_pointer_width = "32"))] |
| fn lo(x: u64) -> usize { |
| (x >> 32) as usize |
| } |
| #[cfg(all(target_endian = "little", target_pointer_width = "32"))] |
| fn hi(x: u64) -> usize { |
| (x & 0xffff_ffff) as usize |
| } |
| #[cfg(all(target_endian = "big", target_pointer_width = "32"))] |
| fn lo(x: u64) -> usize { |
| (x & 0xffff_ffff) as usize |
| } |
| #[cfg(all(target_endian = "big", target_pointer_width = "32"))] |
| fn hi(x: u64) -> usize { |
| (x >> 32) as usize |
| } |
| |
| pub(in super::super) unsafe fn preadv64( |
| fd: c::c_int, |
| iov: *const c::iovec, |
| iovcnt: c::c_int, |
| offset: c::off64_t, |
| ) -> c::ssize_t { |
| // Older Android libc lacks `preadv64`, so use the `weak!` mechanism to |
| // test for it, and call back to `c::syscall`. We don't use |
| // `weak_or_syscall` here because we need to pass the 64-bit offset |
| // specially. |
| weak! { |
| fn preadv64(c::c_int, *const c::iovec, c::c_int, c::off64_t) -> c::ssize_t |
| } |
| if let Some(fun) = preadv64.get() { |
| fun(fd, iov, iovcnt, offset) |
| } else { |
| #[cfg(target_pointer_width = "32")] |
| { |
| c::syscall( |
| c::SYS_preadv, |
| fd, |
| iov, |
| iovcnt, |
| hi(offset as u64), |
| lo(offset as u64), |
| ) as c::ssize_t |
| } |
| #[cfg(target_pointer_width = "64")] |
| { |
| c::syscall(c::SYS_preadv, fd, iov, iovcnt, offset) as c::ssize_t |
| } |
| } |
| } |
| pub(in super::super) unsafe fn pwritev64( |
| fd: c::c_int, |
| iov: *const c::iovec, |
| iovcnt: c::c_int, |
| offset: c::off64_t, |
| ) -> c::ssize_t { |
| // See the comments in `preadv64`. |
| weak! { |
| fn pwritev64(c::c_int, *const c::iovec, c::c_int, c::off64_t) -> c::ssize_t |
| } |
| if let Some(fun) = pwritev64.get() { |
| fun(fd, iov, iovcnt, offset) |
| } else { |
| #[cfg(target_pointer_width = "32")] |
| { |
| c::syscall( |
| c::SYS_pwritev, |
| fd, |
| iov, |
| iovcnt, |
| hi(offset as u64), |
| lo(offset as u64), |
| ) as c::ssize_t |
| } |
| #[cfg(target_pointer_width = "64")] |
| { |
| c::syscall(c::SYS_pwritev, fd, iov, iovcnt, offset) as c::ssize_t |
| } |
| } |
| } |
| } |
| #[cfg(target_os = "android")] |
| pub(super) use readwrite_pv64::{preadv64 as libc_preadv, pwritev64 as libc_pwritev}; |
| |
| // macOS added preadv and pwritev in version 11.0 |
| #[cfg(apple)] |
| mod readwrite_pv { |
| use super::c; |
| |
| weakcall! { |
| pub(in super::super) fn preadv( |
| fd: c::c_int, |
| iov: *const c::iovec, |
| iovcnt: c::c_int, |
| offset: c::off_t |
| ) -> c::ssize_t |
| } |
| weakcall! { |
| pub(in super::super) fn pwritev( |
| fd: c::c_int, |
| iov: *const c::iovec, |
| iovcnt: c::c_int, offset: c::off_t |
| ) -> c::ssize_t |
| } |
| } |
| #[cfg(apple)] |
| pub(super) use readwrite_pv::{preadv as libc_preadv, pwritev as libc_pwritev}; |
| |
| // GLIBC added `preadv64v2` and `pwritev64v2` in version 2.26. |
| #[cfg(all(target_os = "linux", target_env = "gnu"))] |
| mod readwrite_pv64v2 { |
| use super::c; |
| |
| // 64-bit offsets on 32-bit platforms are passed in endianness-specific |
| // lo/hi pairs. See src/backend/linux_raw/conv.rs for details. |
| #[cfg(all(target_endian = "little", target_pointer_width = "32"))] |
| fn lo(x: u64) -> usize { |
| (x >> 32) as usize |
| } |
| #[cfg(all(target_endian = "little", target_pointer_width = "32"))] |
| fn hi(x: u64) -> usize { |
| (x & 0xffff_ffff) as usize |
| } |
| #[cfg(all(target_endian = "big", target_pointer_width = "32"))] |
| fn lo(x: u64) -> usize { |
| (x & 0xffff_ffff) as usize |
| } |
| #[cfg(all(target_endian = "big", target_pointer_width = "32"))] |
| fn hi(x: u64) -> usize { |
| (x >> 32) as usize |
| } |
| |
| pub(in super::super) unsafe fn preadv64v2( |
| fd: c::c_int, |
| iov: *const c::iovec, |
| iovcnt: c::c_int, |
| offset: c::off64_t, |
| flags: c::c_int, |
| ) -> c::ssize_t { |
| // Older GLIBC lacks `preadv64v2`, so use the `weak!` mechanism to |
| // test for it, and call back to `c::syscall`. We don't use |
| // `weak_or_syscall` here because we need to pass the 64-bit offset |
| // specially. |
| weak! { |
| fn preadv64v2(c::c_int, *const c::iovec, c::c_int, c::off64_t, c::c_int) -> c::ssize_t |
| } |
| if let Some(fun) = preadv64v2.get() { |
| fun(fd, iov, iovcnt, offset, flags) |
| } else { |
| #[cfg(target_pointer_width = "32")] |
| { |
| c::syscall( |
| c::SYS_preadv, |
| fd, |
| iov, |
| iovcnt, |
| hi(offset as u64), |
| lo(offset as u64), |
| flags, |
| ) as c::ssize_t |
| } |
| #[cfg(target_pointer_width = "64")] |
| { |
| c::syscall(c::SYS_preadv2, fd, iov, iovcnt, offset, flags) as c::ssize_t |
| } |
| } |
| } |
| pub(in super::super) unsafe fn pwritev64v2( |
| fd: c::c_int, |
| iov: *const c::iovec, |
| iovcnt: c::c_int, |
| offset: c::off64_t, |
| flags: c::c_int, |
| ) -> c::ssize_t { |
| // See the comments in `preadv64v2`. |
| weak! { |
| fn pwritev64v2(c::c_int, *const c::iovec, c::c_int, c::off64_t, c::c_int) -> c::ssize_t |
| } |
| if let Some(fun) = pwritev64v2.get() { |
| fun(fd, iov, iovcnt, offset, flags) |
| } else { |
| #[cfg(target_pointer_width = "32")] |
| { |
| c::syscall( |
| c::SYS_pwritev, |
| fd, |
| iov, |
| iovcnt, |
| hi(offset as u64), |
| lo(offset as u64), |
| flags, |
| ) as c::ssize_t |
| } |
| #[cfg(target_pointer_width = "64")] |
| { |
| c::syscall(c::SYS_pwritev2, fd, iov, iovcnt, offset, flags) as c::ssize_t |
| } |
| } |
| } |
| } |
| #[cfg(all(target_os = "linux", target_env = "gnu"))] |
| pub(super) use readwrite_pv64v2::{preadv64v2 as libc_preadv2, pwritev64v2 as libc_pwritev2}; |
| |
| #[cfg(not(any( |
| apple, |
| netbsdlike, |
| solarish, |
| windows, |
| target_os = "aix", |
| target_os = "android", |
| target_os = "dragonfly", |
| target_os = "fuchsia", |
| target_os = "linux", |
| target_os = "l4re", |
| target_os = "redox", |
| )))] |
| #[cfg(feature = "fs")] |
| pub(super) use c::posix_fallocate as libc_posix_fallocate; |
| #[cfg(target_os = "l4re")] |
| #[cfg(feature = "fs")] |
| pub(super) use c::posix_fallocate64 as libc_posix_fallocate; |
| #[cfg(not(any( |
| linux_like, |
| solarish, |
| windows, |
| target_os = "haiku", |
| target_os = "netbsd", |
| target_os = "redox", |
| target_os = "wasi", |
| )))] |
| #[cfg(feature = "fs")] |
| pub(super) use {c::fstatfs as libc_fstatfs, c::statfs as libc_statfs}; |
| #[cfg(not(any( |
| linux_like, |
| solarish, |
| windows, |
| target_os = "haiku", |
| target_os = "redox", |
| target_os = "wasi", |
| )))] |
| #[cfg(feature = "fs")] |
| pub(super) use {c::fstatvfs as libc_fstatvfs, c::statvfs as libc_statvfs}; |
| |
| #[cfg(linux_like)] |
| #[cfg(feature = "fs")] |
| pub(super) use { |
| c::fstatfs64 as libc_fstatfs, c::fstatvfs64 as libc_fstatvfs, c::statfs64 as libc_statfs, |
| c::statvfs64 as libc_statvfs, |
| }; |
