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#include <stdio.h>
#include <utmp.h>
#include <time.h>
main()
{
FILE *fp;
struct utmp ut;
struct tm *tm;
char user[9];
char host[17];
char line[13];
if ((fp = fopen(UTMP_FILE, "r")) == NULL)
{
printf("Could not open wtmp file!");
exit(1);
}
/* Go to end of file minus one structure */
fseek(fp, -1L * sizeof(struct utmp), SEEK_END);
while (fread(&ut, sizeof(struct utmp), 1, fp) == 1)
{
tm = localtime(&ut.ut_time);
/*
if (tm->tm_year != now.tm_year || tm->tm_yday != now.tm_yday)
break;
*/
printf("%02d:%02d type=", tm->tm_hour,tm->tm_min);
switch (ut.ut_type)
{
#ifndef SUNOS
case RUN_LVL: printf("RUN_LVL");
break;
case BOOT_TIME: printf("BOOT_TIME");
break;
case NEW_TIME: printf("NEW_TIME");
break;
case OLD_TIME: printf("OLD_TIME");
break;
case INIT_PROCESS: printf("INIT_PROCESS");
break;
case LOGIN_PROCESS: printf("LOGIN_PROCESS");
break;
case USER_PROCESS: printf("USER_PROCESS");
break;
case DEAD_PROCESS: printf("DEAD_PROCESS");
break;
#endif
default: printf("UNKNOWN!(type=%d)", ut.ut_type);
}
strncpy(user, ut.ut_user, 8);
user[8] = 0;
strncpy(host, ut.ut_host, 16);
host[16] = 0;
strncpy(line, ut.ut_line, 12);
line[12] = 0;
printf(" line=%s host=%s user=%s\n", line, host, user);
/* Position the file pointer 2 structures back */
if (fseek(fp, -2 * sizeof(struct utmp), SEEK_CUR) < 0) break;
}
fclose(fp);
}
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