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 #include <signal.h>
  43 #include <sys/types.h>
  44 #include <sys/types.h>
  45 #include <sys/wait.h>
  46
  47
  48 #include <libtest/killpid.h>
  49 #include <libtest/stream.h>
  50
  51 using namespace libtest;
  52
  53 bool kill_pid(pid_t pid_arg)
  54 {
  55   assert(pid_arg > 0);
  56   if (pid_arg < 1)
  57   {
  58     Error << "Invalid pid:" << pid_arg;
  59     return false;
  60   }
  61
  62   if ((::kill(pid_arg, SIGTERM) == -1))
  63   {
  64     switch (errno)
  65     {
  66     case EPERM:
  67       Error << "Does someone else have a process running locally for " << int(pid_arg) << "?";
  68       return false;
  69
  70     case ESRCH:
  71       Error << "Process " << int(pid_arg) << " not found.";
  72       return false;
  73
  74     default:
  75     case EINVAL:
  76       Error << "kill() " << strerror(errno);
  77       return false;
  78     }
  79   }
  80
  81   int status= 0;
  82   if (waitpid(pid_arg, &status, 0) == -1)
  83   {
  84     switch (errno)
  85     {
  86       // Just means that the server has already gone away
  87     case ECHILD:
  88       {
  89         return true;
  90       }
  91     }
  92
  93     Error << "Error occured while waitpid(" << strerror(errno) << ") on pid " << int(pid_arg);
  94
  95     return false;
  96   }
  97
  98   return true;
  99 }
 100
 101
 102 void kill_file(const std::string &filename)
 103 {
 104   FILE *fp;
 105
 106   if (filename.empty())
 107     return;
 108
 109   if ((fp= fopen(filename.c_str(), "r")))
 110   {
 111     char pid_buffer[1024];
 112
 113     char *ptr= fgets(pid_buffer, sizeof(pid_buffer), fp);
 114     fclose(fp);
 115
 116     if (ptr)
 117     {
 118       pid_t pid= (pid_t)atoi(pid_buffer);
 119       if (pid != 0)
 120       {
 121         kill_pid(pid);
 122         unlink(filename.c_str()); // If this happens we may be dealing with a dead server that left its pid file.
 123       }
 124     }
 125   }
 126 }