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Added dup() support

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This commit is contained in:
Manoj Ampalam 2016-03-07 15:13:32 -08:00
parent 04ae5b8469
commit 81efa6a3b7
1 changed files with 37 additions and 3 deletions
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40
contrib/win32/win32compat/w32fd.c
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@ -602,10 +602,44 @@ w32_select(int fds, w32_fd_set* readfds, w32_fd_set* writefds, w32_fd_set* excep
int
w32_dup(int oldfd) {
int min_index;
struct w32_io* pio;
HANDLE src, target;
CHECK_FD(oldfd);
errno = EOPNOTSUPP;
debug("ERROR: dup is not implemented yet");
return -1;
if (oldfd > STDERR_FILENO) {
errno = EOPNOTSUPP;
debug("ERROR: dup only supported for std io, fd:%d", oldfd);
return -1;
}
if ((min_index = fd_table_get_min_index()) == -1)
return -1;
src = GetStdHandle(fd_table.w32_ios[oldfd]->std_handle);
if (src == INVALID_HANDLE_VALUE) {
errno = EINVAL;
debug("ERROR: unable to get underlying handle for std fd:%d", oldfd);
return -1;
}
if (!DuplicateHandle(GetCurrentProcess(), src, GetCurrentProcess(), &target, 0, TRUE, DUPLICATE_SAME_ACCESS)) {
errno = EOTHER;
debug("ERROR: Duplicated Handle failed, error:%d", GetLastError());
return -1;
}
pio = (struct w32_io*) malloc(sizeof(struct w32_io));
if (pio == NULL) {
CloseHandle(target);
errno = ENOMEM;
debug("ERROR: %d", errno);
return -1;
}
pio->handle = target;
pio->type = FILE_FD;
fd_table_set(pio, min_index);
return min_index;
}
int