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

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