1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
|
//! Automatically enable “large file” support features.
#[cfg(not(windows))]
use super::c;
#[cfg(not(any(
windows,
target_os = "android",
target_os = "linux",
target_os = "emscripten",
target_os = "l4re",
)))]
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(any(
target_os = "android",
target_os = "linux",
target_os = "emscripten",
target_os = "l4re",
))]
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, rlimit64 as libc_rlimit,
};
#[cfg(not(any(
windows,
target_os = "android",
target_os = "linux",
target_os = "emscripten",
target_os = "l4re",
target_os = "wasi",
)))]
#[cfg(any(feature = "mm", feature = "time", target_arch = "x86"))] // vdso.rs uses `madvise`
pub(super) use c::mmap as libc_mmap;
#[cfg(not(any(
windows,
target_os = "android",
target_os = "linux",
target_os = "emscripten",
target_os = "fuchsia",
target_os = "l4re",
target_os = "redox",
target_os = "wasi",
)))]
pub(super) use c::{rlimit as libc_rlimit, RLIM_INFINITY as LIBC_RLIM_INFINITY};
#[cfg(not(any(
windows,
target_os = "android",
target_os = "fuchsia",
target_os = "emscripten",
target_os = "l4re",
target_os = "linux",
target_os = "wasi",
)))]
pub(super) use c::{getrlimit as libc_getrlimit, setrlimit as libc_setrlimit};
// TODO: Add `RLIM64_INFINITY` to upstream libc.
#[cfg(any(
target_os = "android",
target_os = "linux",
target_os = "emscripten",
target_os = "l4re",
))]
pub(super) const LIBC_RLIM_INFINITY: u64 = !0_u64;
#[cfg(any(
target_os = "android",
target_os = "linux",
target_os = "emscripten",
target_os = "l4re",
))]
pub(super) use c::{getrlimit64 as libc_getrlimit, setrlimit64 as libc_setrlimit};
#[cfg(any(
target_os = "android",
target_os = "linux",
target_os = "emscripten",
target_os = "l4re",
))]
#[cfg(any(feature = "mm", feature = "time", target_arch = "x86"))] // vdso.rs uses `madvise`
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(
windows,
target_os = "android",
target_os = "linux",
target_os = "emscripten",
target_os = "l4re",
target_os = "redox",
)))]
pub(super) use c::openat as libc_openat;
#[cfg(any(
target_os = "android",
target_os = "linux",
target_os = "emscripten",
target_os = "l4re",
))]
pub(super) use c::openat64 as libc_openat;
#[cfg(target_os = "fuchsia")]
pub(super) use c::fallocate as libc_fallocate;
#[cfg(any(target_os = "android", target_os = "linux"))]
pub(super) use c::fallocate64 as libc_fallocate;
#[cfg(not(any(
windows,
target_os = "android",
target_os = "dragonfly",
target_os = "emscripten",
target_os = "illumos",
target_os = "ios",
target_os = "linux",
target_os = "l4re",
target_os = "macos",
target_os = "netbsd",
target_os = "openbsd",
target_os = "redox",
)))]
pub(super) use c::posix_fadvise as libc_posix_fadvise;
#[cfg(any(
target_os = "android",
target_os = "emscripten",
target_os = "linux",
target_os = "l4re",
))]
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(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/imp/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(not(any(
windows,
target_os = "android",
target_os = "emscripten",
target_os = "ios",
target_os = "linux",
target_os = "macos",
target_os = "redox",
)))]
pub(super) use c::{preadv as libc_preadv, pwritev as libc_pwritev};
#[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(any(target_os = "ios", target_os = "macos"))]
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(all(target_os = "linux", target_env = "gnu"))]
pub(super) use c::{preadv64v2 as libc_preadv2, pwritev64v2 as libc_pwritev2};
#[cfg(any(target_os = "ios", target_os = "macos"))]
pub(super) use readwrite_pv::{preadv as libc_preadv, pwritev as libc_pwritev};
#[cfg(not(any(
windows,
target_os = "android",
target_os = "dragonfly",
target_os = "fuchsia",
target_os = "illumos",
target_os = "ios",
target_os = "linux",
target_os = "l4re",
target_os = "macos",
target_os = "netbsd",
target_os = "openbsd",
target_os = "redox",
)))]
pub(super) use c::posix_fallocate as libc_posix_fallocate;
#[cfg(any(target_os = "l4re"))]
pub(super) use c::posix_fallocate64 as libc_posix_fallocate;
#[cfg(not(any(
windows,
target_os = "android",
target_os = "emscripten",
target_os = "illumos",
target_os = "linux",
target_os = "l4re",
target_os = "netbsd",
target_os = "redox",
target_os = "wasi",
)))]
pub(super) use {c::fstatfs as libc_fstatfs, c::statfs as libc_statfs};
#[cfg(any(
target_os = "android",
target_os = "linux",
target_os = "emscripten",
target_os = "l4re",
))]
pub(super) use {c::fstatfs64 as libc_fstatfs, c::statfs64 as libc_statfs};
|
