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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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13
libc/calls/dup3.c
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@ -18,10 +18,11 @@
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/calls/internal.h"
#include "libc/intrin/strace.internal.h"
#include "libc/calls/syscall-nt.internal.h"
#include "libc/calls/syscall-sysv.internal.h"
#include "libc/dce.h"
#include "libc/intrin/strace.internal.h"
#include "libc/sysv/consts/o.h"
#include "libc/sysv/errfuns.h"
/**
@ -46,14 +47,14 @@
*/
int dup3(int oldfd, int newfd, int flags) {
int rc;
if (__isfdkind(oldfd, kFdZip)) {
if (oldfd == newfd || (flags & ~O_CLOEXEC)) {
rc = einval(); // NetBSD doesn't do this
} else if (oldfd < 0 || newfd < 0) {
rc = ebadf();
} else if (__isfdkind(oldfd, kFdZip)) {
rc = eopnotsupp();
} else if (oldfd == newfd) {
rc = einval();
} else if (!IsWindows()) {
rc = sys_dup3(oldfd, newfd, flags);
} else if (newfd < 0) {
rc = ebadf();
} else {
rc = sys_dup_nt(oldfd, newfd, flags, -1);
}