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

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  36
  37 #include <libtest/common.h>
  38
  39 #include <cstdlib>
  40 #include <cstring>
  41 #include <iostream>
  42
  43 #include <libtest/killpid.h>
  44 #include <libtest/stream.h>
  45
  46 using namespace libtest;
  47
  48 bool kill_pid(pid_t pid_arg)
  49 {
  50   if (pid_arg <= 1)
  51     return false;
  52
  53   if ((::kill(pid_arg, SIGTERM) == -1))
  54   {
  55     switch (errno)
  56     {
  57     case EPERM:
  58       perror(__func__);
  59       Error << __func__ << " -> Does someone else have a process running locally for " << int(pid_arg) << "?";
  60       return false;
  61
  62     case ESRCH:
  63       perror(__func__);
  64       Error << "Process " << int(pid_arg) << " not found.";
  65       return false;
  66
  67     default:
  68     case EINVAL:
  69       perror(__func__);
  70       return false;
  71     }
  72   }
  73
  74   int status= 0;
  75   pid_t pid= waitpid(pid_arg, &status, 0);
  76   if (pid == -1)
  77   {
  78     switch (errno)
  79     {
  80     case ECHILD:
  81       return true;
  82     }
  83
  84     Error << "Error occured while waitpid(" << strerror(errno) << ") on pid " << int(pid_arg);
  85
  86     return false;
  87   }
  88
  89   if (WIFEXITED(status))
  90     return true;
  91
  92   if (WCOREDUMP(status))
  93     return true;
  94
  95   return false;
  96 }
  97
  98
  99 void kill_file(const std::string &filename)
 100 {
 101   FILE *fp;
 102
 103   if (filename.empty())
 104     return;
 105
 106   if ((fp= fopen(filename.c_str(), "r")))
 107   {
 108     char pid_buffer[1024];
 109
 110     char *ptr= fgets(pid_buffer, sizeof(pid_buffer), fp);
 111     fclose(fp);
 112
 113     if (ptr)
 114     {
 115       pid_t pid= (pid_t)atoi(pid_buffer);
 116       if (pid != 0)
 117       {
 118         kill_pid(pid);
 119         unlink(filename.c_str()); // If this happens we may be dealing with a dead server that left its pid file.
 120       }
 121     }
 122   }
 123 }