[hackers] [ubase] login: Write utmp entry || sin

From: <git_AT_suckless.org>
Date: Wed, 02 Jul 2014 13:06:02 +0200

commit d0145aaf1f156606ce1eb1ba32a5e432cd55888a
Author: sin <sin_AT_2f30.org>
Date: Tue Jul 1 15:42:31 2014 +0100

    login: Write utmp entry

diff --git a/login.c b/login.c
index aa0ad3c..76d8022 100644
--- a/login.c
+++ b/login.c
_AT_@ -8,7 +8,9 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <time.h>
 #include <unistd.h>
+#include <utmp.h>
 
 #include "config.h"
 #include "passwd.h"
_AT_@ -26,7 +28,10 @@ int
 main(int argc, char *argv[])
 {
         struct passwd *pw;
+ struct utmp usr;
+ FILE *fp;
         char *pass;
+ char *tty;
         uid_t uid;
         gid_t gid;
         int pflag = 0;
_AT_@ -71,6 +76,24 @@ main(int argc, char *argv[])
         if (setuid(uid) < 0)
                 eprintf("setuid:");
 
+ /* Write utmp entry */
+ memset(&usr, 0, sizeof(usr));
+
+ tty = ttyname(STDIN_FILENO);
+ if (!tty)
+ tty = "?";
+ usr.ut_type = USER_PROCESS;
+ usr.ut_pid = getpid();
+ strlcpy(usr.ut_user, argv[0], sizeof(usr.ut_user));
+ strlcpy(usr.ut_line, tty, sizeof(usr.ut_line));
+ usr.ut_tv.tv_sec = time(NULL);
+
+ fp = fopen("/var/run/utmp", "a");
+ if (!fp)
+ weprintf("fopen %s:", "/var/run/utmp");
+ fwrite(&usr, sizeof(usr), 1, fp);
+ fclose(fp);
+
         return dologin(pw, pflag);
 }
 
Received on Wed Jul 02 2014 - 13:06:02 CEST