Jeremy Soller
93 lines
2.5 KiB
Rust
93 lines
2.5 KiB
Rust
//! `fcntl.h` implementation.
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//!
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//! See <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/fcntl.h.html>.
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#![deny(unsafe_op_in_unsafe_fn)]
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use crate::{
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c_str::CStr,
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error::ResultExt,
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platform::{
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Pal, Sys,
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types::{c_char, c_int, c_short, c_ulonglong, mode_t, off_t, pid_t},
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},
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};
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pub use self::sys::*;
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#[cfg(target_os = "linux")]
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#[path = "linux.rs"]
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pub mod sys;
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#[cfg(target_os = "redox")]
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#[path = "redox.rs"]
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pub mod sys;
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pub const F_DUPFD: c_int = 0;
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pub const F_GETFD: c_int = 1;
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pub const F_SETFD: c_int = 2;
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pub const F_GETFL: c_int = 3;
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pub const F_SETFL: c_int = 4;
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pub const F_GETLK: c_int = 5;
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pub const F_SETLK: c_int = 6;
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pub const F_SETLKW: c_int = 7;
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pub const F_DUPFD_CLOEXEC: c_int = 1030;
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pub const F_RDLCK: c_int = 0;
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pub const F_WRLCK: c_int = 1;
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pub const F_UNLCK: c_int = 2;
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pub const F_ULOCK: c_int = 0;
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pub const F_LOCK: c_int = 1;
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pub const F_TLOCK: c_int = 2;
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pub const F_TEST: c_int = 3;
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/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/creat.html>.
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#[unsafe(no_mangle)]
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pub unsafe extern "C" fn creat(path: *const c_char, mode: mode_t) -> c_int {
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unsafe { open(path, O_WRONLY | O_CREAT | O_TRUNC, mode) }
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}
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/// See <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/fcntl.h.html>.
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#[repr(C)]
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#[derive(Clone, Copy, Default)]
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pub struct flock {
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pub l_type: c_short,
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pub l_whence: c_short,
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pub l_start: off_t,
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pub l_len: off_t,
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pub l_pid: pid_t,
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}
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/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/fcntl.html>.
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#[unsafe(no_mangle)]
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pub unsafe extern "C" fn fcntl(fildes: c_int, cmd: c_int, mut __valist: ...) -> c_int {
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// c_ulonglong
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let arg = match cmd {
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F_DUPFD | F_SETFD | F_SETFL | F_SETLK | F_SETLKW | F_GETLK | F_DUPFD_CLOEXEC => unsafe {
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__valist.arg::<c_ulonglong>()
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},
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_ => 0,
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};
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Sys::fcntl(fildes, cmd, arg).or_minus_one_errno()
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}
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/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/open.html>.
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#[unsafe(no_mangle)]
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pub unsafe extern "C" fn open(path: *const c_char, oflag: c_int, mut __valist: ...) -> c_int {
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let mode = if oflag & O_CREAT == O_CREAT
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/* || oflag & O_TMPFILE == O_TMPFILE */
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{
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unsafe { __valist.arg::<mode_t>() }
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} else {
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0
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};
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let path = unsafe { CStr::from_ptr(path) };
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Sys::open(path, oflag, mode).or_minus_one_errno()
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}
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#[unsafe(no_mangle)]
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pub unsafe extern "C" fn cbindgen_stupid_struct_user_for_fcntl(a: flock) {}
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