1 files changed, 105 insertions, 0 deletions
diff --git a/src/include/coredumpctl.h b/src/include/coredumpctl.h
new file mode 100644
index 00000000..60fab432
--- /dev/null
+++ b/src/include/coredumpctl.h
@@ -0,0 +1,105 @@
+#pragma once
+
+#include "acconfig.h"
+
+#ifdef HAVE_SYS_PRCTL_H
+#include <iostream>
+#include <sys/prctl.h>
+#include "common/errno.h"
+
+class PrCtl {
+  int saved_state = -1;
+  static int get_dumpable() {
+    int r = prctl(PR_GET_DUMPABLE);
+    if (r == -1) {
+      r = errno;
+      std::cerr << "warning: unable to get dumpable flag: " << cpp_strerror(r)
+                << std::endl;
+    }
+    return r;
+  }
+  static int set_dumpable(bool new_state) {
+    int r = prctl(PR_SET_DUMPABLE, new_state);
+    if (r) {
+      r = -errno;
+      std::cerr << "warning: unable to " << (new_state ? "set" : "unset")
+                << " dumpable flag: " << cpp_strerror(r)
+                << std::endl;
+    }
+    return r;
+  }
+public:
+  PrCtl(int new_state = 0) {
+    int r = get_dumpable();
+    if (r == -1) {
+      return;
+    }
+    if (r != new_state) {
+      if (!set_dumpable(new_state)) {
+        saved_state = r;
+      }
+    }
+  }
+  ~PrCtl() {
+    if (saved_state < 0) {
+      return;
+    }
+    set_dumpable(saved_state);
+  }
+};
+
+#else
+#include <sys/resource.h>
+#ifdef RLIMIT_CORE
+#include <iostream>
+#include <sys/resource.h>
+#include "common/errno.h"
+
+class PrCtl {
+  rlimit saved_lim;
+  static int get_dumpable(rlimit* saved) {
+    int r = getrlimit(RLIMIT_CORE, saved);
+    if (r) {
+      r = errno;
+      std::cerr << "warning: unable to getrlimit(): " << cpp_strerror(r)
+                << std::endl;
+    }
+    return r;
+  }
+  static void set_dumpable(const rlimit& rlim) {
+    int r = setrlimit(RLIMIT_CORE, &rlim);
+    if (r) {
+      r = -errno;
+      std::cerr << "warning: unable to setrlimit(): " << cpp_strerror(r)
+                << std::endl;
+    }
+  }
+public:
+  PrCtl(int new_state = 0) {
+    int r = get_dumpable(&saved_lim);
+    if (r == -1) {
+      return;
+    }
+    rlimit new_lim;
+    if (new_state) {
+      new_lim.rlim_cur = saved_lim.rlim_max;
+    } else {
+      new_lim.rlim_cur = new_lim.rlim_max = 0;
+    }
+    if (new_lim.rlim_cur == saved_lim.rlim_cur) {
+      return;
+    }
+    set_dumpable(new_lim);
+  }
+  ~PrCtl() {
+    set_dumpable(saved_lim);
+  }
+};
+#else
+struct PrCtl {
+  // to silence the Wunused-variable warning
+  PrCtl() {}
+};
+
+#endif  // RLIMIT_CORE
+#endif