refactor win32 shims into posix_win.c

this also adds a rename shim that allows overwrites
2015-06-05 04:31:56 -05:00
parent 1d27b22e82
commit b4a6a61513
5 changed files with 191 additions and 151 deletions
--- a/crypto/compat/posix_win.c
+++ b/crypto/compat/posix_win.c
@@ -0,0 +1,167 @@
+/*
+ * Public domain
+ *
+ * BSD socket emulation code for Winsock2
+ * File IO compatibility shims
+ * Brent Cook <bcook@openbsd.org>
+ */
+
+#define NO_REDEF_POSIX_FUNCTIONS
+
+#include <windows.h>
+#include <ws2tcpip.h>
+
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+void
+posix_perror(const char *s)
+{
+	fprintf(stderr, "%s: %s\n", s, strerror(errno));
+}
+
+FILE *
+posix_fopen(const char *path, const char *mode)
+{
+	if (strchr(mode, 'b') == NULL) {
+		char *bin_mode = NULL;
+		if (asprintf(&bin_mode, "%sb", mode) == -1)
+			return NULL;
+		FILE *f = fopen(path, bin_mode);
+		free(bin_mode);
+		return f;
+	}
+
+	return fopen(path, mode);
+}
+
+int
+posix_rename(const char *oldpath, const char *newpath)
+{
+	MoveFileEx(oldpath, newpath, MOVEFILE_REPLACE_EXISTING) ? 0 : -1;
+}
+
+static int
+wsa_errno(int err)
+{
+	switch (err) {
+	case WSAENOBUFS:
+		errno = ENOMEM;
+		break;
+	case WSAEACCES:
+		errno = EACCES;
+		break;
+	case WSANOTINITIALISED:
+		errno = EPERM;
+		break;
+	case WSAEHOSTUNREACH:
+	case WSAENETDOWN:
+		errno = EIO;
+		break;
+	case WSAEFAULT:
+		errno = EFAULT;
+		break;
+	case WSAEINTR:
+		errno = EINTR;
+		break;
+	case WSAEINVAL:
+		errno = EINVAL;
+		break;
+	case WSAEINPROGRESS:
+		errno = EINPROGRESS;
+		break;
+	case WSAEWOULDBLOCK:
+		errno = EAGAIN;
+		break;
+	case WSAEOPNOTSUPP:
+		errno = ENOTSUP;
+		break;
+	case WSAEMSGSIZE:
+		errno = EFBIG;
+		break;
+	case WSAENOTSOCK:
+		errno = ENOTSOCK;
+		break;
+	case WSAENOPROTOOPT:
+		errno = ENOPROTOOPT;
+		break;
+	case WSAECONNREFUSED:
+		errno = ECONNREFUSED;
+		break;
+	case WSAEAFNOSUPPORT:
+		errno = EAFNOSUPPORT;
+		break;
+	case WSAENETRESET:
+	case WSAENOTCONN:
+	case WSAECONNABORTED:
+	case WSAECONNRESET:
+	case WSAESHUTDOWN:
+	case WSAETIMEDOUT:
+		errno = EPIPE;
+		break;
+	}
+	return -1;
+}
+
+int
+posix_connect(int sockfd, const struct sockaddr *addr, socklen_t addrlen)
+{
+	int rc = connect(sockfd, addr, addrlen);
+	if (rc == SOCKET_ERROR)
+		return wsa_errno(WSAGetLastError());
+	return rc;
+}
+
+int
+posix_close(int fd)
+{
+	if (closesocket(fd) == SOCKET_ERROR) {
+		int err = WSAGetLastError();
+		return err == WSAENOTSOCK ?
+			close(fd) : wsa_errno(err);
+	}
+	return 0;
+}
+
+ssize_t
+posix_read(int fd, void *buf, size_t count)
+{
+	ssize_t rc = recv(fd, buf, count, 0);
+	if (rc == SOCKET_ERROR) {
+		int err = WSAGetLastError();
+		return err == WSAENOTSOCK ?
+			read(fd, buf, count) : wsa_errno(err);
+	}
+	return rc;
+}
+
+ssize_t
+posix_write(int fd, const void *buf, size_t count)
+{
+	ssize_t rc = send(fd, buf, count, 0);
+	if (rc == SOCKET_ERROR) {
+		int err = WSAGetLastError();
+		return err == WSAENOTSOCK ?
+			write(fd, buf, count) : wsa_errno(err);
+	}
+	return rc;
+}
+
+int
+posix_getsockopt(int sockfd, int level, int optname,
+	void *optval, socklen_t *optlen)
+{
+	int rc = getsockopt(sockfd, level, optname, (char *)optval, optlen);
+	return rc == 0 ? 0 : wsa_errno(WSAGetLastError());
+
+}
+
+int
+posix_setsockopt(int sockfd, int level, int optname,
+	const void *optval, socklen_t optlen)
+{
+	int rc = setsockopt(sockfd, level, optname, (char *)optval, optlen);
+	return rc == 0 ? 0 : wsa_errno(WSAGetLastError());
+}