check_smart.cpp
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#include "check_smart.h"
char *servicename = (char*)"SMART";
int evalStatus(char* disk, string reallocatedCount, string currentPending, string offlineUncorrectable, string *status)
{
int returnStatus = 0;
*status = string(disk) + " reallocated_count:";
string reallocatedNum = reallocatedCount.substr(reallocatedCount.find_last_of(" ")+1);
if(reallocatedNum != "0")
{
returnStatus = 1;
}
*status += reallocatedNum + " current_pending:";
string currentNum = currentPending.substr(currentPending.find_last_of(" ")+1);
if(currentNum != "0")
{
returnStatus = 2;
}
*status += currentNum + " offline_uncorrectable:";
string offlineNum = offlineUncorrectable.substr(offlineUncorrectable.find_last_of(" ")+1);
if(offlineNum != "0")
{
returnStatus = 2;
}
*status += offlineNum;
return returnStatus;
}
void printVersion()
{
cout << "check_smart v" << VERSION << endl << endl;
}
void printHelp(bool longVersion)
{
if(longVersion)
{
printVersion();
cout << "Checks for pending, reallocated or uncorrectable sectors in disks using SMART" << endl << "WARNING: Requires the setuid bit to be set to run as root" << endl << endl;
printHelp(false);
cout << "Options:" << endl;
cout << " -h" << endl;
cout << " Print detailed help screen" << endl;
cout << " -V" << endl;
cout << " Print version information" << endl;
cout << " DISKS" << endl;
cout << " Disks for which to retrieve S.M.A.R.T data" << endl << endl;
return;
}
cout << "Usage: " << endl << "check_smart [-hV] DISKS..." << endl << endl;
}
int main(int argc, char **argv)
{
struct itimerval timer;
timer.it_value.tv_sec = 10;
timer.it_value.tv_usec = 0;
timer.it_interval.tv_sec = 0;
timer.it_interval.tv_usec = 0;
setitimer (ITIMER_VIRTUAL, &timer, 0);
struct sigaction sa;
memset (&sa, 0, sizeof (sa));
sa.sa_handler = &timer_handler;
sigaction (SIGVTALRM, &sa, 0);
int c;
while ((c = getopt (argc, argv, "Vh")) != -1)
{
switch(c)
{
case 'h':
printHelp(true);
return 0;
case 'V':
printVersion();
return 0;
case '?':
printHelp(false);
return 3;
}
}
if(argc == 1)
{
cout << "No disks checked" << endl;
return 3;
}
string *results = new string[argc-1];
int returnCode = 0;
string command = string(SMARTCTL_CMD);
stringstream sstream;
string line = "";
string reallocatedCount = "";
string currentPending = "";
string offlineUncorrectable = "";
string status = "";
for(int i = 1; i < argc; i++)
{
string output;
int uid = getuid();
int gid = getgid();
setuid(0);
setgid(0);
int rc = exec(command + argv[i],&output);
setuid(uid);
setgid(gid);
if(rc)
{
cout << "Error reading SMART data from disk" << endl;
exit(3);
}
sstream.str(output);
while(getline(sstream,line))
{
int j = 0;
while(line[j] == ' ')
{
j++;
}
size_t spacePos = line.find_first_of(" ",j);
if(line.substr(j,spacePos-j) == "5")
{
reallocatedCount = line;
}
else if(line.substr(j,spacePos-j) == "197")
{
currentPending = line;
}
else if(line.substr(j,spacePos-j) == "198")
{
offlineUncorrectable = line;
}
}
if((reallocatedCount == "") || (currentPending == "") || (offlineUncorrectable == ""))
{
returnCode = 3;
status = string(argv[i]) + " status UNKNOWN";
}
else
{
switch(evalStatus(argv[i],reallocatedCount,currentPending,offlineUncorrectable,&status))
{
case 0:
//everything is OK
break;
case 1:
//Warning issued
if(!returnCode)
{
returnCode = 1;
}
break;
case 2:
//Critical issued
returnCode = 2;
break;
}
}
results[i-1] = status;
reallocatedCount = "";
currentPending = "";
offlineUncorrectable = "";
output = "";
line = "";
status = "";
sstream.str("");
sstream.clear();
}
cout << servicename;
if(returnCode == 0)
{
cout << " OK - disk status: ";
}
else if(returnCode == 1)
{
cout << " WARNING - disk status: ";
}
else if(returnCode == 2)
{
cout << " CRITICAL - disk status: ";
}
else if(returnCode == 3)
{
cout << " UNKNOWN - disk status: ";
}
for(int i = 0; i < (argc-1); i++)
{
cout << results[i];
if(i != (argc-2))
{
cout << ", ";
}
}
cout << endl;
return returnCode;
}