1 //! Libc and supplemental types and constants.
2
3 #![allow(unused_imports)]
4
5 // Import everything from libc, but we'll add some stuff and override some
6 // things below.
7 pub(crate) use libc::*;
8
9 /// `PROC_SUPER_MAGIC`—The magic number for the procfs filesystem.
10 #[cfg(all(linux_kernel, target_env = "musl"))]
11 pub(crate) const PROC_SUPER_MAGIC: u32 = 0x0000_9fa0;
12
13 /// `NFS_SUPER_MAGIC`—The magic number for the NFS filesystem.
14 #[cfg(all(linux_kernel, target_env = "musl"))]
15 pub(crate) const NFS_SUPER_MAGIC: u32 = 0x0000_6969;
16
17 #[cfg(feature = "process")]
18 #[cfg(not(any(target_os = "espidf", target_os = "wasi")))]
19 pub(crate) const EXIT_SIGNALED_SIGABRT: c_int = 128 + SIGABRT as c_int;
20
21 // TODO: Upstream these.
22 #[cfg(all(linux_kernel, feature = "net"))]
23 pub(crate) const ETH_P_TSN: c_int = linux_raw_sys::if_ether::ETH_P_TSN as _;
24 #[cfg(all(linux_kernel, feature = "net"))]
25 pub(crate) const ETH_P_ERSPAN2: c_int = linux_raw_sys::if_ether::ETH_P_ERSPAN2 as _;
26 #[cfg(all(linux_kernel, feature = "net"))]
27 pub(crate) const ETH_P_ERSPAN: c_int = linux_raw_sys::if_ether::ETH_P_ERSPAN as _;
28 #[cfg(all(linux_kernel, feature = "net"))]
29 pub(crate) const ETH_P_PROFINET: c_int = linux_raw_sys::if_ether::ETH_P_PROFINET as _;
30 #[cfg(all(linux_kernel, feature = "net"))]
31 pub(crate) const ETH_P_REALTEK: c_int = linux_raw_sys::if_ether::ETH_P_REALTEK as _;
32 #[cfg(all(linux_kernel, feature = "net"))]
33 pub(crate) const ETH_P_ETHERCAT: c_int = linux_raw_sys::if_ether::ETH_P_ETHERCAT as _;
34 #[cfg(all(linux_kernel, feature = "net"))]
35 pub(crate) const ETH_P_PREAUTH: c_int = linux_raw_sys::if_ether::ETH_P_PREAUTH as _;
36 #[cfg(all(linux_kernel, feature = "net"))]
37 pub(crate) const ETH_P_LLDP: c_int = linux_raw_sys::if_ether::ETH_P_LLDP as _;
38 #[cfg(all(linux_kernel, feature = "net"))]
39 pub(crate) const ETH_P_MRP: c_int = linux_raw_sys::if_ether::ETH_P_MRP as _;
40 #[cfg(all(linux_kernel, feature = "net"))]
41 pub(crate) const ETH_P_NCSI: c_int = linux_raw_sys::if_ether::ETH_P_NCSI as _;
42 #[cfg(all(linux_kernel, feature = "net"))]
43 pub(crate) const ETH_P_CFM: c_int = linux_raw_sys::if_ether::ETH_P_CFM as _;
44 #[cfg(all(linux_kernel, feature = "net"))]
45 pub(crate) const ETH_P_IBOE: c_int = linux_raw_sys::if_ether::ETH_P_IBOE as _;
46 #[cfg(all(linux_kernel, feature = "net"))]
47 pub(crate) const ETH_P_HSR: c_int = linux_raw_sys::if_ether::ETH_P_HSR as _;
48 #[cfg(all(linux_kernel, feature = "net"))]
49 pub(crate) const ETH_P_NSH: c_int = linux_raw_sys::if_ether::ETH_P_NSH as _;
50 #[cfg(all(linux_kernel, feature = "net"))]
51 pub(crate) const ETH_P_DSA_8021Q: c_int = linux_raw_sys::if_ether::ETH_P_DSA_8021Q as _;
52 #[cfg(all(linux_kernel, feature = "net"))]
53 pub(crate) const ETH_P_DSA_A5PSW: c_int = linux_raw_sys::if_ether::ETH_P_DSA_A5PSW as _;
54 #[cfg(all(linux_kernel, feature = "net"))]
55 pub(crate) const ETH_P_IFE: c_int = linux_raw_sys::if_ether::ETH_P_IFE as _;
56 #[cfg(all(linux_kernel, feature = "net"))]
57 pub(crate) const ETH_P_CAN: c_int = linux_raw_sys::if_ether::ETH_P_CAN as _;
58 #[cfg(all(linux_kernel, feature = "net"))]
59 pub(crate) const ETH_P_CANXL: c_int = linux_raw_sys::if_ether::ETH_P_CANXL as _;
60 #[cfg(all(linux_kernel, feature = "net"))]
61 pub(crate) const ETH_P_XDSA: c_int = linux_raw_sys::if_ether::ETH_P_XDSA as _;
62 #[cfg(all(linux_kernel, feature = "net"))]
63 pub(crate) const ETH_P_MAP: c_int = linux_raw_sys::if_ether::ETH_P_MAP as _;
64 #[cfg(all(linux_kernel, feature = "net"))]
65 pub(crate) const ETH_P_MCTP: c_int = linux_raw_sys::if_ether::ETH_P_MCTP as _;
66
67 #[cfg(all(
68 linux_kernel,
69 any(
70 target_arch = "mips",
71 target_arch = "mips32r6",
72 target_arch = "mips64",
73 target_arch = "mips64r6",
74 target_arch = "sparc",
75 target_arch = "sparc64"
76 )
77 ))]
78 pub(crate) const SIGEMT: c_int = linux_raw_sys::general::SIGEMT as _;
79
80 // TODO: Upstream these.
81 #[cfg(all(linux_kernel, feature = "termios"))]
82 pub(crate) const IUCLC: tcflag_t = linux_raw_sys::general::IUCLC as _;
83 #[cfg(all(linux_kernel, feature = "termios"))]
84 pub(crate) const XCASE: tcflag_t = linux_raw_sys::general::XCASE as _;
85
86 #[cfg(target_os = "aix")]
87 pub(crate) const MSG_DONTWAIT: c_int = libc::MSG_NONBLOCK;
88
89 // TODO: Remove once https://github.com/rust-lang/libc/pull/3377 is merged and released.
90 #[cfg(target_os = "netbsd")]
91 #[cfg(feature = "net")]
92 pub(crate) const SO_NOSIGPIPE: c_int = 0x0800;
93
94 // On PowerPC, the regular `termios` has the `termios2` fields and there is no
95 // `termios2`. linux-raw-sys has aliases `termios2` to `termios` to cover this
96 // difference, but we still need to manually import it since `libc` doesn't
97 // have this.
98 #[cfg(all(
99 linux_kernel,
100 feature = "termios",
101 any(target_arch = "powerpc", target_arch = "powerpc64")
102 ))]
103 pub(crate) use {
104 linux_raw_sys::general::{termios2, CIBAUD},
105 linux_raw_sys::ioctl::{TCGETS2, TCSETS2, TCSETSF2, TCSETSW2},
106 };
107
108 // Automatically enable “large file” support (LFS) features.
109
110 #[cfg(target_os = "vxworks")]
111 pub(super) use libc::_Vx_ticks64_t as _Vx_ticks_t;
112 #[cfg(linux_kernel)]
113 pub(super) use libc::fallocate64 as fallocate;
114 #[cfg(not(any(target_arch = "aarch64", target_arch = "riscv64")))]
115 #[cfg(any(linux_like, target_os = "aix"))]
116 pub(super) use libc::open64 as open;
117 #[cfg(any(
118 linux_kernel,
119 target_os = "aix",
120 target_os = "hurd",
121 target_os = "l4re"
122 ))]
123 pub(super) use libc::posix_fallocate64 as posix_fallocate;
124 #[cfg(any(all(linux_like, not(target_os = "android")), target_os = "aix"))]
125 pub(super) use libc::{blkcnt64_t as blkcnt_t, rlim64_t as rlim_t};
126 // TODO: AIX has `stat64x`, `fstat64x`, `lstat64x`, and `stat64xat`; add them
127 // to the upstream libc crate and implement rustix's `statat` etc. with them.
128 #[cfg(target_os = "aix")]
129 pub(super) use libc::{
130 blksize64_t as blksize_t, fstat64 as fstat, fstatfs64 as fstatfs, fstatvfs64 as fstatvfs,
131 ftruncate64 as ftruncate, getrlimit64 as getrlimit, ino_t, lseek64 as lseek, mmap,
132 off64_t as off_t, openat, posix_fadvise64 as posix_fadvise, preadv, pwritev,
133 rlimit64 as rlimit, setrlimit64 as setrlimit, stat64at as fstatat, statfs64 as statfs,
134 statvfs64 as statvfs, RLIM_INFINITY,
135 };
136 #[cfg(any(linux_like, target_os = "hurd"))]
137 pub(super) use libc::{
138 fstat64 as fstat, fstatat64 as fstatat, fstatfs64 as fstatfs, fstatvfs64 as fstatvfs,
139 ftruncate64 as ftruncate, getrlimit64 as getrlimit, ino64_t as ino_t, lseek64 as lseek,
140 mmap64 as mmap, off64_t as off_t, openat64 as openat, posix_fadvise64 as posix_fadvise,
141 rlimit64 as rlimit, setrlimit64 as setrlimit, statfs64 as statfs, statvfs64 as statvfs,
142 RLIM64_INFINITY as RLIM_INFINITY,
143 };
144 #[cfg(apple)]
145 pub(super) use libc::{
146 host_info64_t as host_info_t, host_statistics64 as host_statistics,
147 vm_statistics64_t as vm_statistics_t,
148 };
149 #[cfg(not(all(
150 linux_kernel,
151 any(
152 target_pointer_width = "32",
153 target_arch = "mips64",
154 target_arch = "mips64r6"
155 )
156 )))]
157 #[cfg(any(linux_like, target_os = "aix", target_os = "hurd"))]
158 pub(super) use libc::{lstat64 as lstat, stat64 as stat};
159 #[cfg(any(
160 linux_kernel,
161 target_os = "aix",
162 target_os = "hurd",
163 target_os = "emscripten"
164 ))]
165 pub(super) use libc::{pread64 as pread, pwrite64 as pwrite};
166 #[cfg(any(target_os = "linux", target_os = "hurd", target_os = "emscripten"))]
167 pub(super) use libc::{preadv64 as preadv, pwritev64 as pwritev};
168
169 #[cfg(all(target_os = "linux", any(target_env = "gnu", target_env = "uclibc")))]
prlimit( pid: libc::pid_t, resource: libc::__rlimit_resource_t, new_limit: *const libc::rlimit64, old_limit: *mut libc::rlimit64, ) -> libc::c_int170 pub(super) unsafe fn prlimit(
171 pid: libc::pid_t,
172 resource: libc::__rlimit_resource_t,
173 new_limit: *const libc::rlimit64,
174 old_limit: *mut libc::rlimit64,
175 ) -> libc::c_int {
176 // `prlimit64` wasn't supported in glibc until 2.13.
177 weak_or_syscall! {
178 fn prlimit64(
179 pid: libc::pid_t,
180 resource: libc::__rlimit_resource_t,
181 new_limit: *const libc::rlimit64,
182 old_limit: *mut libc::rlimit64
183 ) via SYS_prlimit64 -> libc::c_int
184 }
185
186 prlimit64(pid, resource, new_limit, old_limit)
187 }
188
189 #[cfg(all(target_os = "linux", target_env = "musl"))]
prlimit( pid: libc::pid_t, resource: libc::c_int, new_limit: *const libc::rlimit64, old_limit: *mut libc::rlimit64, ) -> libc::c_int190 pub(super) unsafe fn prlimit(
191 pid: libc::pid_t,
192 resource: libc::c_int,
193 new_limit: *const libc::rlimit64,
194 old_limit: *mut libc::rlimit64,
195 ) -> libc::c_int {
196 weak_or_syscall! {
197 fn prlimit64(
198 pid: libc::pid_t,
199 resource: libc::c_int,
200 new_limit: *const libc::rlimit64,
201 old_limit: *mut libc::rlimit64
202 ) via SYS_prlimit64 -> libc::c_int
203 }
204
205 prlimit64(pid, resource, new_limit, old_limit)
206 }
207
208 #[cfg(target_os = "android")]
prlimit( pid: libc::pid_t, resource: libc::c_int, new_limit: *const libc::rlimit64, old_limit: *mut libc::rlimit64, ) -> libc::c_int209 pub(super) unsafe fn prlimit(
210 pid: libc::pid_t,
211 resource: libc::c_int,
212 new_limit: *const libc::rlimit64,
213 old_limit: *mut libc::rlimit64,
214 ) -> libc::c_int {
215 weak_or_syscall! {
216 fn prlimit64(
217 pid: libc::pid_t,
218 resource: libc::c_int,
219 new_limit: *const libc::rlimit64,
220 old_limit: *mut libc::rlimit64
221 ) via SYS_prlimit64 -> libc::c_int
222 }
223
224 prlimit64(pid, resource, new_limit, old_limit)
225 }
226
227 #[cfg(target_os = "android")]
228 mod readwrite_pv64 {
229 use super::*;
230
preadv64( fd: libc::c_int, iov: *const libc::iovec, iovcnt: libc::c_int, offset: libc::off64_t, ) -> libc::ssize_t231 pub(in super::super) unsafe fn preadv64(
232 fd: libc::c_int,
233 iov: *const libc::iovec,
234 iovcnt: libc::c_int,
235 offset: libc::off64_t,
236 ) -> libc::ssize_t {
237 // Older Android libc lacks `preadv64`, so use the `weak!` mechanism to
238 // test for it, and call back to `libc::syscall`. We don't use
239 // `weak_or_syscall` here because we need to pass the 64-bit offset
240 // specially.
241 weak! {
242 fn preadv64(libc::c_int, *const libc::iovec, libc::c_int, libc::off64_t) -> libc::ssize_t
243 }
244 if let Some(fun) = preadv64.get() {
245 fun(fd, iov, iovcnt, offset)
246 } else {
247 // Unlike the plain "p" functions, the "pv" functions pass their
248 // offset in an endian-independent way, and always in two registers.
249 syscall! {
250 fn preadv(
251 fd: libc::c_int,
252 iov: *const libc::iovec,
253 iovcnt: libc::c_int,
254 offset_lo: usize,
255 offset_hi: usize
256 ) via SYS_preadv -> libc::ssize_t
257 }
258 preadv(fd, iov, iovcnt, offset as usize, (offset >> 32) as usize)
259 }
260 }
pwritev64( fd: libc::c_int, iov: *const libc::iovec, iovcnt: libc::c_int, offset: libc::off64_t, ) -> libc::ssize_t261 pub(in super::super) unsafe fn pwritev64(
262 fd: libc::c_int,
263 iov: *const libc::iovec,
264 iovcnt: libc::c_int,
265 offset: libc::off64_t,
266 ) -> libc::ssize_t {
267 // See the comments in `preadv64`.
268 weak! {
269 fn pwritev64(libc::c_int, *const libc::iovec, libc::c_int, libc::off64_t) -> libc::ssize_t
270 }
271 if let Some(fun) = pwritev64.get() {
272 fun(fd, iov, iovcnt, offset)
273 } else {
274 // Unlike the plain "p" functions, the "pv" functions pass their
275 // offset in an endian-independent way, and always in two registers.
276 syscall! {
277 fn pwritev(
278 fd: libc::c_int,
279 iov: *const libc::iovec,
280 iovcnt: libc::c_int,
281 offset_lo: usize,
282 offset_hi: usize
283 ) via SYS_pwritev -> libc::ssize_t
284 }
285 pwritev(fd, iov, iovcnt, offset as usize, (offset >> 32) as usize)
286 }
287 }
288 }
289 #[cfg(target_os = "android")]
290 pub(super) use readwrite_pv64::{preadv64 as preadv, pwritev64 as pwritev};
291
292 // macOS added `preadv` and `pwritev` in version 11.0.
293 #[cfg(apple)]
294 mod readwrite_pv {
295 weakcall! {
296 pub(in super::super) fn preadv(
297 fd: libc::c_int,
298 iov: *const libc::iovec,
299 iovcnt: libc::c_int,
300 offset: libc::off_t
301 ) -> libc::ssize_t
302 }
303 weakcall! {
304 pub(in super::super) fn pwritev(
305 fd: libc::c_int,
306 iov: *const libc::iovec,
307 iovcnt: libc::c_int, offset: libc::off_t
308 ) -> libc::ssize_t
309 }
310 }
311 #[cfg(apple)]
312 pub(super) use readwrite_pv::{preadv, pwritev};
313
314 // glibc added `preadv64v2` and `pwritev64v2` in version 2.26.
315 #[cfg(all(target_os = "linux", target_env = "gnu"))]
316 mod readwrite_pv64v2 {
317 use super::*;
318
preadv64v2( fd: libc::c_int, iov: *const libc::iovec, iovcnt: libc::c_int, offset: libc::off64_t, flags: libc::c_int, ) -> libc::ssize_t319 pub(in super::super) unsafe fn preadv64v2(
320 fd: libc::c_int,
321 iov: *const libc::iovec,
322 iovcnt: libc::c_int,
323 offset: libc::off64_t,
324 flags: libc::c_int,
325 ) -> libc::ssize_t {
326 // Older glibc lacks `preadv64v2`, so use the `weak!` mechanism to
327 // test for it, and call back to `libc::syscall`. We don't use
328 // `weak_or_syscall` here because we need to pass the 64-bit offset
329 // specially.
330 weak! {
331 fn preadv64v2(libc::c_int, *const libc::iovec, libc::c_int, libc::off64_t, libc::c_int) -> libc::ssize_t
332 }
333 if let Some(fun) = preadv64v2.get() {
334 fun(fd, iov, iovcnt, offset, flags)
335 } else {
336 // Unlike the plain "p" functions, the "pv" functions pass their
337 // offset in an endian-independent way, and always in two registers.
338 syscall! {
339 fn preadv2(
340 fd: libc::c_int,
341 iov: *const libc::iovec,
342 iovcnt: libc::c_int,
343 offset_lo: usize,
344 offset_hi: usize,
345 flags: libc::c_int
346 ) via SYS_preadv2 -> libc::ssize_t
347 }
348 preadv2(
349 fd,
350 iov,
351 iovcnt,
352 offset as usize,
353 (offset >> 32) as usize,
354 flags,
355 )
356 }
357 }
pwritev64v2( fd: libc::c_int, iov: *const libc::iovec, iovcnt: libc::c_int, offset: libc::off64_t, flags: libc::c_int, ) -> libc::ssize_t358 pub(in super::super) unsafe fn pwritev64v2(
359 fd: libc::c_int,
360 iov: *const libc::iovec,
361 iovcnt: libc::c_int,
362 offset: libc::off64_t,
363 flags: libc::c_int,
364 ) -> libc::ssize_t {
365 // See the comments in `preadv64v2`.
366 weak! {
367 fn pwritev64v2(libc::c_int, *const libc::iovec, libc::c_int, libc::off64_t, libc::c_int) -> libc::ssize_t
368 }
369 if let Some(fun) = pwritev64v2.get() {
370 fun(fd, iov, iovcnt, offset, flags)
371 } else {
372 // Unlike the plain "p" functions, the "pv" functions pass their
373 // offset in an endian-independent way, and always in two registers.
374 syscall! {
375 fn pwritev2(
376 fd: libc::c_int,
377 iov: *const libc::iovec,
378 iovec: libc::c_int,
379 offset_lo: usize,
380 offset_hi: usize,
381 flags: libc::c_int
382 ) via SYS_pwritev2 -> libc::ssize_t
383 }
384 pwritev2(
385 fd,
386 iov,
387 iovcnt,
388 offset as usize,
389 (offset >> 32) as usize,
390 flags,
391 )
392 }
393 }
394 }
395 #[cfg(all(target_os = "linux", target_env = "gnu"))]
396 pub(super) use readwrite_pv64v2::{preadv64v2 as preadv2, pwritev64v2 as pwritev2};
397
398 // On non-glibc, assume we don't have `pwritev2`/`preadv2` in libc and use
399 // `c::syscall` instead.
400 #[cfg(any(
401 target_os = "android",
402 all(target_os = "linux", not(target_env = "gnu")),
403 ))]
404 mod readwrite_pv64v2 {
405 use super::*;
406
preadv64v2( fd: libc::c_int, iov: *const libc::iovec, iovcnt: libc::c_int, offset: libc::off64_t, flags: libc::c_int, ) -> libc::ssize_t407 pub(in super::super) unsafe fn preadv64v2(
408 fd: libc::c_int,
409 iov: *const libc::iovec,
410 iovcnt: libc::c_int,
411 offset: libc::off64_t,
412 flags: libc::c_int,
413 ) -> libc::ssize_t {
414 // Unlike the plain "p" functions, the "pv" functions pass their offset
415 // in an endian-independent way, and always in two registers.
416 syscall! {
417 fn preadv2(
418 fd: libc::c_int,
419 iov: *const libc::iovec,
420 iovcnt: libc::c_int,
421 offset_lo: usize,
422 offset_hi: usize,
423 flags: libc::c_int
424 ) via SYS_preadv2 -> libc::ssize_t
425 }
426 preadv2(
427 fd,
428 iov,
429 iovcnt,
430 offset as usize,
431 (offset >> 32) as usize,
432 flags,
433 )
434 }
pwritev64v2( fd: libc::c_int, iov: *const libc::iovec, iovcnt: libc::c_int, offset: libc::off64_t, flags: libc::c_int, ) -> libc::ssize_t435 pub(in super::super) unsafe fn pwritev64v2(
436 fd: libc::c_int,
437 iov: *const libc::iovec,
438 iovcnt: libc::c_int,
439 offset: libc::off64_t,
440 flags: libc::c_int,
441 ) -> libc::ssize_t {
442 // Unlike the plain "p" functions, the "pv" functions pass their offset
443 // in an endian-independent way, and always in two registers.
444 syscall! {
445 fn pwritev2(
446 fd: libc::c_int,
447 iov: *const libc::iovec,
448 iovcnt: libc::c_int,
449 offset_lo: usize,
450 offset_hi: usize,
451 flags: libc::c_int
452 ) via SYS_pwritev2 -> libc::ssize_t
453 }
454 pwritev2(
455 fd,
456 iov,
457 iovcnt,
458 offset as usize,
459 (offset >> 32) as usize,
460 flags,
461 )
462 }
463 }
464 #[cfg(any(
465 target_os = "android",
466 all(target_os = "linux", not(target_env = "gnu")),
467 ))]
468 pub(super) use readwrite_pv64v2::{preadv64v2 as preadv2, pwritev64v2 as pwritev2};
469