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/* Calculates total time used at ISP */
/* Works with dip-3.3.7o-uri         */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <pwd.h>


main(int argc, char **argv)
{
	int started = 0, total = 0, used;
	int hour, min, sec;
	char s[1026], s2[30], startdate[20], *p;
	char user[16];
	char login_s[50], logout_s[50];
	FILE *f;
	struct passwd *pw;

	if (! (f = fopen("/var/adm/messages", "r"))) {
		perror("open");
		exit(1);
	}

	if (argc > 1) {
		if (argc == 2)
			strcpy(startdate, argv[1]);
		else
			sprintf(startdate, "%s %2s", argv[1], argv[2]);
	}

	pw = getpwuid(getuid());
	memset(user, 0, sizeof(user));
	strncpy(user, pw->pw_name, sizeof(user));

	sprintf(login_s, "]: %s dial-up", user);
	sprintf(logout_s, "]: %s down", user);

	while (fgets(s, 1024, f)) {
		if ((! started) && (argc > 1)) {
			if (argc == 2) {
				if (strncmp(s, startdate, 3))
					continue;
			} else {
				if (strncmp(s, startdate, 6))
					continue;
			}
		}

		started = 1;
		if (strstr(s, login_s)) {
			strncpy(s2, s, 15);
			s2[15] = 0;
			printf("Login:  %s\n", s2);
		} else if (strstr(s, logout_s)) {
			strncpy(s2, s, 15);
			s2[15] = 0;
			printf("Logout: %s   ", s2);

			memset(s2, 0, 30);
			p = strstr(s, "online") + 7;
			strncpy(s2, p, strlen(p) - 2);
			used = atoi(s2);
			hour = used / 3600;
			min = (used / 60) % 60;
			sec = used % 60;
			printf("Time used: %d hours %d minutes %d seconds\n\n",
				hour, min, sec);

			total += used;
                }        
	}

	fclose(f);

	hour = total / 3600;
	min = (total / 60) % 60;
	sec = total % 60;

	printf("\nTotal time used: %d hours %d minutes %d seconds\n\n",
		hour, min, sec);
}
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