Merge pull request #4095 from apple/🍒/austria/a4d6de2031ad2f92d399fc8d1b1301229ed8255b

[lldb] Fix TestProcessIOHandlerInterrupt.py for macos

Author: JDevlieghere

lldb/test/API/iohandler/sigint/cat.cpp

@@ -1,9 +1,25 @@
-#include <iostream>
+#include <cstdio>
+#include <string>
+#include <unistd.h>
+
+std::string getline() {
+  std::string result;
+  while (true) {
+    int r;
+    char c;
+    do
+      r = read(fileno(stdin), &c, 1);
+    while (r == -1 && errno == EINTR);
+    if (r <= 0 || c == '\n')
+      return result;
+    result += c;
+  }
+}
 
 void input_copy_loop() {
   std::string str;
-  while (std::getline(std::cin, str))
-    std::cout << "read: " << str << std::endl;
+  while (str = getline(), !str.empty())
+    printf("read: %s\n", str.c_str());
 }
 
 int main() {