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Make important improvements

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- Fix preadv() and pwritev() for old distros
- Introduce _npassert() and _unassert() macros
- Prove that file locks work properly on Windows
- Support fcntl(F_DUPFD_CLOEXEC) on more systems
This commit is contained in:
Justine Tunney 2022-09-14 21:29:50 -07:00
parent 1ad2f530f9
commit 3f49889841
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GPG key ID: BE714B4575D6E328
130 changed files with 1225 additions and 431 deletions
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9
libc/calls/pread.c
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@ -46,8 +46,11 @@
*/
ssize_t pread(int fd, void *buf, size_t size, int64_t offset) {
ssize_t rc;
if (fd == -1 || offset < 0) return einval();
if (IsAsan() && !__asan_is_valid(buf, size)) {
if (offset < 0) {
rc = einval();
} else if (fd < 0) {
rc = ebadf();
} else if (IsAsan() && !__asan_is_valid(buf, size)) {
rc = efault();
} else if (__isfdkind(fd, kFdZip)) {
rc = _weaken(__zipos_read)(
@ -60,7 +63,7 @@ ssize_t pread(int fd, void *buf, size_t size, int64_t offset) {
} else {
rc = ebadf();
}
assert(rc == -1 || (size_t)rc <= size);
_npassert(rc == -1 || (size_t)rc <= size);
DATATRACE("pread(%d, [%#.*hhs%s], %'zu, %'zd) → %'zd% m", fd,
MAX(0, MIN(40, rc)), buf, rc > 40 ? "..." : "", size, offset, rc);
return rc;