Update all licenses to BSD.

[m6w6/libmemcached] / libtest / killpid.cc

diff --git a/libtest/killpid.cc b/libtest/killpid.cc
index 1d5992db175cd486b2897de1c7f10ce85155c6b1..aae43bb391bc12729bf82648653ecf4892708627 100644 (file)
--- a/libtest/killpid.cc
+++ b/libtest/killpid.cc
@@ -1,8 +1,8 @@
 /*  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
- * 
- *  uTest
  *
- *  Copyright (C) 2011 Data Differential, http://datadifferential.com/
+ *  Data Differential YATL (i.e. libtest)  library
+ *
+ *  Copyright (C) 2012 Data Differential, http://datadifferential.com/
  *
  *  Redistribution and use in source and binary forms, with or without
  *  modification, are permitted provided that the following conditions are
@@ -34,11 +34,13 @@
  *
  */
 
+#include <config.h>
 #include <libtest/common.h>
 
 #include <cstdlib>
 #include <cstring>
 #include <iostream>
+#include <sstream>
 #include <signal.h>
 #include <sys/types.h>
 #include <sys/types.h>
@@ -98,15 +100,43 @@ bool kill_pid(pid_t pid_arg)
   return true;
 }
 
-
-pid_t kill_file(const std::string &filename)
+bool check_pid(const std::string &filename)
 {
-  pid_t ret= -1;
+  if (filename.empty())
+  {
+    return false;
+  }
+
   FILE *fp;
+  if ((fp= fopen(filename.c_str(), "r")))
+  {
+    char pid_buffer[1024];
 
+    char *ptr= fgets(pid_buffer, sizeof(pid_buffer), fp);
+    fclose(fp);
+
+    if (ptr)
+    {
+      pid_t pid= (pid_t)atoi(pid_buffer);
+      if (pid > 0)
+      {
+        return (::kill(pid, 0) == 0);
+      }
+    }
+  }
+  
+  return false;
+}
+
+
+bool kill_file(const std::string &filename)
+{
   if (filename.empty())
-    return ret;
+  {
+    return true;
+  }
 
+  FILE *fp;
   if ((fp= fopen(filename.c_str(), "r")))
   {
     char pid_buffer[1024];
@@ -119,23 +149,29 @@ pid_t kill_file(const std::string &filename)
       pid_t pid= (pid_t)atoi(pid_buffer);
       if (pid != 0)
       {
-        kill_pid(pid);
+        bool ret= kill_pid(pid);
         unlink(filename.c_str()); // If this happens we may be dealing with a dead server that left its pid file.
+
+        return ret;
       }
     }
   }
   
-  return ret;
+  return false;
 }
 
-pid_t get_pid_from_file(const std::string &filename)
+#define STRINGIFY(x) #x
+#define TOSTRING(x) STRINGIFY(x)
+#define LIBTEST_AT __FILE__ ":" TOSTRING(__LINE__)
+
+pid_t get_pid_from_file(const std::string &filename, std::stringstream& error_message)
 {
   pid_t ret= -1;
   FILE *fp;
 
   if (filename.empty())
   {
-    Error << "empty pid file";
+    error_message << LIBTEST_AT << " empty pid file";
     return ret;
   }
 
@@ -149,11 +185,23 @@ pid_t get_pid_from_file(const std::string &filename)
     if (ptr)
     {
       ret= (pid_t)atoi(pid_buffer);
-      if (ret <= 0)
+      if (ret < 1)
       {
-        return ret;
+        error_message << LIBTEST_AT << " Invalid pid was read from file " << filename;
       }
     }
+    else
+    {
+      error_message << LIBTEST_AT << " File " << filename << " was empty ";
+    }
+
+    return ret;
+  }
+  else
+  {
+    char buffer[1024];
+    char *current_directory= getcwd(buffer, sizeof(buffer));
+    error_message << "Error while opening " << current_directory << "/" << filename << " " << strerror(errno);
   }
   
   return ret;