installed pty

[VSoRC/.git] / node_modules / node-pty / deps / winpty / src / unix-adapter / Util.cc

diff --git a/node_modules/node-pty/deps/winpty/src/unix-adapter/Util.cc b/node_modules/node-pty/deps/winpty/src/unix-adapter/Util.cc
new file mode 100644 (file)
index 0000000..e13f84a
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+++ b/node_modules/node-pty/deps/winpty/src/unix-adapter/Util.cc
@@ -0,0 +1,86 @@
+// Copyright (c) 2015 Ryan Prichard
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+// IN THE SOFTWARE.
+
+#include "Util.h"
+
+#include <assert.h>
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "../shared/DebugClient.h"
+
+// Write the entire buffer, restarting it as necessary.
+bool writeAll(int fd, const void *buffer, size_t size) {
+    size_t written = 0;
+    while (written < size) {
+        int ret = write(fd,
+                        reinterpret_cast<const char*>(buffer) + written,
+                        size - written);
+        if (ret == -1 && errno == EINTR) {
+            continue;
+        }
+        if (ret <= 0) {
+            trace("write failed: "
+                "fd=%d errno=%d size=%u written=%d ret=%d",
+                fd,
+                errno,
+                static_cast<unsigned int>(size),
+                static_cast<unsigned int>(written),
+                ret);
+            return false;
+        }
+        assert(static_cast<size_t>(ret) <= size - written);
+        written += ret;
+    }
+    assert(written == size);
+    return true;
+}
+
+bool writeStr(int fd, const char *str) {
+    return writeAll(fd, str, strlen(str));
+}
+
+void selectWrapper(const char *diagName, int nfds, fd_set *readfds) {
+    int ret = select(nfds, readfds, NULL, NULL, NULL);
+    if (ret < 0) {
+        if (errno == EINTR) {
+            FD_ZERO(readfds);
+            return;
+        }
+#ifdef WINPTY_TARGET_MSYS1
+        // The select system call sometimes fails with EAGAIN instead of EINTR.
+        // This apparantly only happens with the old Cygwin fork "MSYS" used in
+        // the mingw.org project.  select is not supposed to fail with EAGAIN,
+        // and EAGAIN does not make much sense as an error code.  (The whole
+        // point of select is to block.)
+        if (errno == EAGAIN) {
+            trace("%s select returned EAGAIN: interpreting like EINTR",
+                diagName);
+            FD_ZERO(readfds);
+            return;
+        }
+#endif
+        fprintf(stderr, "Internal error: %s select failed: "
+            "error %d", diagName, errno);
+        abort();
+    }
+}