I cannot figure out why my ouput has a core dump. The program should display info about the cpu, take the time of the report and take the averages of all the times.

Thanks

#include #include #include #include #define SHORT 0; #define LONG 1; #define STANDARD 2; int main(int argc, char *argv[]) { char repTypeName[16]; // Name of Report Type FILE *thisProcFile; // File pointer for this particular /proc file char lineBuf[256]; // Buffer for reading a line in the /proc file int reportType; // Report type = 0, 1, 2 char c1, c2; // for checking first argument (eg : -s) struct timeval now; // for keeping time int interval; // Interval between wakeup int duration; // Duration of sleep int iteration = 1; // used for loop iteration int bufSize = 255; // determine report type reportType = STANDARD; // report = STANDARD by default strcpy(repTypeName, "Standard"); // // if there is argument in command line,(ie: argc is more than 1), read them if (argc > 1) { sscanf(argv[1], "%c%c", &c1, &c2); // if 1st char in 1st arg isn't "-", tell user how to give commands if (c1!='-') { fprintf(stderr, "usage: observer [-s][-I int dur] "); exit(1); } // if 1st char is "-" check 2nd char, if it is "s", short report. if (c2=='s') { reportType = SHORT; strcpy(repTypeName,"Short"); } // else if it is "l", long report, get the interval and duration if (c2=='l') { reportType = LONG; strcpy(repTypeName, "Long"); interval = atoi(argv[2]); duration = atoi(argv[3]); } } // Finish Initializing then read time and display message gettimeofday(&now, NULL); // Get the time of day printf(" ------- Observer program to get info about system ------ "); printf("1. Status report type: %s ", repTypeName); printf("2. Time of report: %s", (float)ctime(&(now.tv_sec))); // Get host filename and print info from it thisProcFile=fopen("/proc/cpuinfo","r"); fgets(lineBuf, bufSize, thisProcFile); printf("3. Machine hostname : %s ", lineBuf); fclose(thisProcFile); printf("interval: %d ", interval); printf("duration: %d ", duration); // Code to read the relevant /proc files printf("4. Load averages "); while (iteration *interval < duration) { sleep(interval); // sample the LoadAvg file; thisProcFile=fopen("/proc/loadavg","r"); fgets(lineBuf, bufSize, thisProcFile); printf(" Iteration no %d (time: %d) : %s", iteration, iteration*interval, lineBuf); iteration = iteration + 1; fclose(thisProcFile); } exit(0); }

My Output:

------- Observer program to get info about system ------

1. Status report type: Standard 2. Time of report: Segmentation fault (core dumped)