#include "libbb.h"
#include <utmp.h>
+/* NB: ut_name and ut_user are the same field, use only one name (ut_user)
+ * to reduce confusion */
+
#ifndef SHUTDOWN_TIME
# define SHUTDOWN_TIME 254
#endif
#endif
int last_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int last_main(int argc, char **argv ATTRIBUTE_UNUSED)
+int last_main(int argc, char **argv UNUSED_PARAM)
{
struct utmp ut;
int n, file = STDIN_FILENO;
/* do we really need to be cautious here? */
n = index_in_strings(_ut_usr, ut.ut_user);
if (++n > 0)
- ut.ut_type = n;
+ ut.ut_type = n != 3 ? n : SHUTDOWN_TIME;
#else
if (strncmp(ut.ut_user, "shutdown", 8) == 0)
ut.ut_type = SHUTDOWN_TIME;
ut.ut_type = RUN_LVL;
#endif
} else {
- if (ut.ut_name[0] == '\0' || strcmp(ut.ut_name, "LOGIN") == 0) {
+ if (ut.ut_user[0] == '\0' || strcmp(ut.ut_user, "LOGIN") == 0) {
/* Don't bother. This means we can't find how long
* someone was logged in for. Oh well. */
goto next;
}
if (ut.ut_type != DEAD_PROCESS
- && ut.ut_name[0] && ut.ut_line[0]
+ && ut.ut_user[0] && ut.ut_line[0]
) {
ut.ut_type = USER_PROCESS;
}
- if (strcmp(ut.ut_name, "date") == 0) {
+ if (strcmp(ut.ut_user, "date") == 0) {
if (n == TYPE_OLD_TIME) { /* '|' */
ut.ut_type = OLD_TIME;
}
strcpy(ut.ut_line, "system boot");
}
}
+ /* manpages say ut_tv.tv_sec *is* time_t,
+ * but some systems have it wrong */
t_tmp = (time_t)ut.ut_tv.tv_sec;
printf("%-10s %-14s %-18s %-12.12s\n",
ut.ut_user, ut.ut_line, ut.ut_host, ctime(&t_tmp) + 4);
next:
- if (!pos)
+ pos -= sizeof(ut);
+ if (pos <= 0)
break; /* done. */
- pos = lseek(file, pos - sizeof(ut), SEEK_SET);
+ xlseek(file, pos, SEEK_SET);
}
fflush_stdout_and_exit(EXIT_SUCCESS);