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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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41
libc/calls/chdir-nt.c
View file

@ -26,35 +26,36 @@
#include "libc/nt/synchronization.h"
#include "libc/sysv/errfuns.h"
textwindows int sys_chdir_nt(const char *path) {
textwindows int sys_chdir_nt_impl(char16_t path[hasatleast PATH_MAX],
uint32_t len) {
uint32_t n;
int e, ms, err, len;
char16_t path16[PATH_MAX], var[4];
if ((len = __mkntpath(path, path16)) == -1) return -1;
if (!len) return enoent();
if (len && path16[len - 1] != u'\\') {
int e, ms, err;
char16_t var[4];
if (len && path[len - 1] != u'\\') {
if (len + 2 > PATH_MAX) return enametoolong();
path16[len + 0] = u'\\';
path16[len + 1] = u'\0';
path[len + 0] = u'\\';
path[len + 1] = u'\0';
}
/*
* chdir() seems flaky on windows 7
* in a similar way to rmdir() sigh
*/
for (err = errno, ms = 1;; ms *= 2) {
if (SetCurrentDirectory(path16)) {
if (SetCurrentDirectory(path)) {
/*
* Now we need to set a magic environment variable.
*/
if ((n = GetCurrentDirectory(ARRAYLEN(path16), path16))) {
if (n < ARRAYLEN(path16)) {
if (!((path16[0] == '/' && path16[1] == '/') ||
(path16[0] == '\\' && path16[1] == '\\'))) {
if ((n = GetCurrentDirectory(PATH_MAX, path))) {
if (n < PATH_MAX) {
if (!((path[0] == '/' && path[1] == '/') ||
(path[0] == '\\' && path[1] == '\\'))) {
var[0] = '=';
var[1] = path16[0];
var[1] = path[0];
var[2] = ':';
var[3] = 0;
if (!SetEnvironmentVariable(var, path16)) {
if (!SetEnvironmentVariable(var, path)) {
return __winerr();
}
}
@ -77,5 +78,13 @@ textwindows int sys_chdir_nt(const char *path) {
}
}
}
return __fix_enotdir(-1, path16);
return __fix_enotdir(-1, path);
}
textwindows int sys_chdir_nt(const char *path) {
int len;
char16_t path16[PATH_MAX];
if ((len = __mkntpath(path, path16)) == -1) return -1;
if (!len) return enoent();
return sys_chdir_nt_impl(path16, len);
}