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Introduce posix_spawn_file_actions_addchdir_np()

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Justine Tunney 2023-10-11 20:26:28 -07:00
parent f92ad74e6b
commit 3a1f887928
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GPG key ID: BE714B4575D6E328
25 changed files with 446 additions and 748 deletions
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57
libc/calls/mkntpath.c
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@ -54,6 +54,35 @@ textwindows static const char *FixNtMagicPath(const char *path,
return path;
}
textwindows size_t __normntpath(char16_t *p, size_t n) {
size_t i, j;
for (j = i = 0; i < n; ++i) {
int c = p[i];
if (c == '/') {
c = '\\';
}
if (j > 1 && c == '\\' && p[j - 1] == '\\') {
// matched "^/" or "//" but not "^//"
} else if ((j && p[j - 1] == '\\') && //
c == '.' && //
(i + 1 == n || IsSlash(p[i + 1]))) {
// matched "/./" or "/.$"
i += !(i + 1 == n);
} else if ((j && p[j - 1] == '\\') && //
c == '.' && //
(i + 1 < n && p[i + 1] == '.') && //
(i + 2 == n || IsSlash(p[i + 2]))) {
// matched "/../" or "/..$"
while (j && p[j - 1] == '\\') --j;
while (j && p[j - 1] != '\\') --j;
} else {
p[j++] = c;
}
}
p[j] = 0;
return j;
}
textwindows int __mkntpath(const char *path,
char16_t path16[hasatleast PATH_MAX]) {
return __mkntpath2(path, path16, -1);
@ -78,7 +107,6 @@ textwindows int __mkntpath(const char *path,
*/
textwindows int __mkntpath2(const char *path,
char16_t path16[hasatleast PATH_MAX], int flags) {
// 1. Need +1 for NUL-terminator
// 2. Need +1 for UTF-16 overflow
// 3. Need ≥2 for SetCurrentDirectory trailing slash requirement
@ -165,32 +193,7 @@ textwindows int __mkntpath2(const char *path,
// normalize path
// we need it because \\?\... paths have to be normalized
// we don't remove the trailing slash since it is special
size_t i, j;
for (j = i = 0; i < n; ++i) {
int c = p[i];
if (c == '/') {
c = '\\';
}
if (j > 1 && c == '\\' && p[j - 1] == '\\') {
// matched "^/" or "//" but not "^//"
} else if ((j && p[j - 1] == '\\') && //
c == '.' && //
(i + 1 == n || IsSlash(p[i + 1]))) {
// matched "/./" or "/.$"
i += !(i + 1 == n);
} else if ((j && p[j - 1] == '\\') && //
c == '.' && //
(i + 1 < n && p[i + 1] == '.') && //
(i + 2 == n || IsSlash(p[i + 2]))) {
// matched "/../" or "/..$"
while (j && p[j - 1] == '\\') --j;
while (j && p[j - 1] != '\\') --j;
} else {
p[j++] = c;
}
}
p[j] = 0;
n = j;
n = __normntpath(p, n);
// our path is now stored at `path16` with length `n`
n = x + m + n;