git.m6w6.name Git - m6w6/libmemcached/blob - libtest/killpid.cc

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  36
  37 #include <config.h>
  38
  39 #include <cerrno>
  40 #include <cstdlib>
  41 #include <cstring>
  42 #include <iostream>
  43
  44 #include <libtest/killpid.h>
  45
  46 bool kill_pid(pid_t pid_arg)
  47 {
  48   if (pid_arg <= 1)
  49     return false;
  50
  51   if ((::kill(pid_arg, SIGTERM) == -1))
  52   {
  53     switch (errno)
  54     {
  55     case EPERM:
  56       perror(__func__);
  57       std::cerr << __func__ << " -> Does someone else have a process running locally for " << int(pid_arg) << "?" << std::endl;
  58       return false;
  59
  60     case ESRCH:
  61       perror(__func__);
  62       std::cerr << "Process " << int(pid_arg) << " not found." << std::endl;
  63       return false;
  64
  65     default:
  66     case EINVAL:
  67       perror(__func__);
  68       return false;
  69     }
  70   }
  71
  72   int status= 0;
  73   pid_t pid= waitpid(pid_arg, &status, 0);
  74   if (pid == -1)
  75   {
  76     switch (errno)
  77     {
  78     case ECHILD:
  79       return true;
  80     }
  81     std::cerr << std::endl << "Error occured while waitpid(" << strerror(errno) << ") on pid " << int(pid_arg) << std::endl;
  82     return false;
  83   }
  84
  85   if (WIFEXITED(status))
  86     return true;
  87
  88   if (WCOREDUMP(status))
  89     return true;
  90
  91   return false;
  92 }
  93
  94
  95 void kill_file(const std::string &filename)
  96 {
  97   FILE *fp;
  98
  99   if (filename.empty())
 100     return;
 101
 102   if ((fp= fopen(filename.c_str(), "r")))
 103   {
 104     char pid_buffer[1024];
 105
 106     char *ptr= fgets(pid_buffer, sizeof(pid_buffer), fp);
 107     fclose(fp);
 108
 109     if (ptr)
 110     {
 111       pid_t pid= (pid_t)atoi(pid_buffer);
 112       if (pid != 0)
 113       {
 114         kill_pid(pid);
 115         unlink(filename.c_str()); // If this happens we may be dealing with a dead server that left its pid file.
 116       }
 117     }
 118   }
 119 }