Listing 4: check()

#include <stdio.h>
#include <stdlib.h>
#include <utmp.h>
#include <time.h>
#include <unistd.h>
#include <sys/types.h>
#include "latool.h"

/*
* AUTHOR: Charles C. Bundy IV
* VERS  : $Id$
*
* Takes a given Unix user name and the unix login
* accounting file (which corresponds to 'wtmp'
* format) and builds a complete record of login/
* logouts including accumulated time statistics.
* A 'logout' is considered a usual blank wtmp
* entry for the corresponding ptty, OR a shutdown
* entry.
*/

int check (loginID, LogFile)
char *loginID, *LogFile;
{
FILE *fp;
struct utmp record[NUMREC];
time_t *clock;
time_t OnTime, AccTime;
int i,j,k;
char *ID;

fp = fopen(LogFile, "r");

if (fp == NULL)
{
printf("<b>\n*\n*");
printf(" ERROR: couldn't open \"%s\" for read",
LogFile);
printf("\n*\n</b>");
return -1;
}

i = 0;
while ((!feof(fp)) && (i < NUMREC))
{
fread((char *)&record[i],
sizeof(record[0]), 1, fp);
if (strlen(record[i].ut_host) > 18)
record[i].ut_host[17] = '\0';
i++;
}
fclose(fp);

if (i >= NUMREC)
{
printf("<b>*\n* WARNING: Only read %d", NUMREC);
printf(" records for log file %s.\n", LogFile);
printf("*\n</b>\n");
}

AccTime = 0;

printf("Login/Logout Statistics for: <b>%s</b><hr>",
loginID);

for (j=0; j<i; j++)
{
if (strcmp(loginID,record[j].ut_name) == 0)
{
clock = &(record[j].ut_time);
printf("%10s :%10s :%18s :%s",
record[j].ut_line, record[j].ut_name,
record[j].ut_host, ctime(clock));

for (k=j+1; k<i; k++)
if ((strcmp(record[j].ut_line,
record[k].ut_line) == 0) ||
(strcmp("~", record[k].ut_line) == 0))
{
clock = &(record[k].ut_time);
printf("%10s :%10s :%18s :%s",
record[k].ut_line,
record[k].ut_name,
record[k].ut_host,
ctime(clock));
OnTime = record[k].ut_time -
record[j].ut_time;
AccTime = AccTime + OnTime;
printf("OnTime: %ld hours", OnTime/3600);
printf(" %ld minutes", (OnTime%3600)/60);
printf(" %ld seconds.\n", OnTime%60);
break;
}
}
}
printf("<HR>");
printf("Total Time Online: %ld hours",AccTime/3600);
printf(" %ld minutes", (AccTime%3600)/60);
printf(" %ld seconds.\n", AccTime%60);

ID = "$Id$";
return 0;
}

/* End of File */