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Improve system call documentation

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This change also introduces partial faccessat() support for zipos and
makes some slight breaking changes in errno results. close() is fixed
to use `EBADF` rather than `EINVAL` and we're now using `ENOTSUP` not
`EOPNOTSUPP` to indicate that zipos doesn't support a system call yet
This commit is contained in:
Justine Tunney 2022-10-02 07:42:44 -07:00
parent 0b5f84dd20
commit ad97775370
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GPG key ID: BE714B4575D6E328
18 changed files with 273 additions and 67 deletions
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12
libc/calls/dup3.c
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@ -38,11 +38,13 @@
* @param flags may have O_CLOEXEC which is needed to preserve the
* close-on-execve() state after file descriptor duplication
* @return newfd on success, or -1 w/ errno
* @raise EINVAL if flags has unsupported bits
* @raise EINVAL if newfd equals oldfd
* @raise EBADF is oldfd isn't open
* @raise EBADF is newfd negative or too big
* @raise ENOTSUP if `oldfd` is a zip file descriptor
* @raise EPERM if pledge() is in play without stdio
* @raise EINVAL if `flags` has unsupported bits
* @raise EINTR if a signal handler was called
* @raise EBADF is `newfd` negative or too big
* @raise EINVAL if `newfd` equals oldfd
* @raise EBADF is `oldfd` isn't open
* @see dup(), dup2()
*/
int dup3(int oldfd, int newfd, int flags) {
@ -52,7 +54,7 @@ int dup3(int oldfd, int newfd, int flags) {
} else if (oldfd < 0 || newfd < 0) {
rc = ebadf();
} else if (__isfdkind(oldfd, kFdZip)) {
rc = eopnotsupp();
rc = enotsup();
} else if (!IsWindows()) {
rc = sys_dup3(oldfd, newfd, flags);
} else {