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Improve system call support on NT

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- Improve i/o perf on New Technology
- Code cleanup on read() for New Technology
- Fix bad bug with dup() of socket on New Technology
- Clean up some more strace errors on New Technology
This commit is contained in:
Justine Tunney 2022-04-07 20:30:04 -07:00
parent 29bf8b1a30
commit 4f98ad1054
79 changed files with 707 additions and 197 deletions
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31
libc/calls/mkdirat-nt.c
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@ -24,13 +24,20 @@
#include "libc/str/str.h"
static textwindows bool SubpathExistsThatsNotDirectory(char16_t *path) {
int e;
char16_t *p;
uint32_t attrs;
e = errno;
while ((p = strrchr16(path, '\\'))) {
*p = u'\0';
if ((attrs = GetFileAttributes(path)) != -1u) {
if (attrs & kNtFileAttributeDirectory) return false;
return true;
if (attrs & kNtFileAttributeDirectory) {
return false;
} else {
return true;
}
} else {
errno = e;
}
}
return false;
@ -40,10 +47,20 @@ textwindows int sys_mkdirat_nt(int dirfd, const char *path, uint32_t mode) {
int e;
char16_t *p, path16[PATH_MAX];
if (__mkntpathat(dirfd, path, 0, path16) == -1) return -1;
if (CreateDirectory(path16, NULL)) return 0;
e = GetLastError();
/* WIN32 doesn't distinguish between ENOTDIR and ENOENT */
if (e == ENOTDIR && !SubpathExistsThatsNotDirectory(path16)) e = ENOENT;
errno = e;
if (CreateDirectory(path16, 0)) return 0;
// WIN32 doesn't distinguish between ENOTDIR and ENOENT
//
// - ENOTDIR: A component used as a directory in pathname is not, in
// fact, a directory. -or- pathname is relative and dirfd is a file
// descriptor referring to a file other than a directory.
//
// - ENOENT: A directory component in pathname does not exist or is a
// dangling symbolic link.
if (errno == ENOTDIR) {
if (!SubpathExistsThatsNotDirectory(path16)) {
errno = ENOENT;
}
}
return -1;
}