diff options
Diffstat (limited to 'lib/libutil/login.c')
| -rw-r--r-- | lib/libutil/login.c | 37 |
1 files changed, 28 insertions, 9 deletions
diff --git a/lib/libutil/login.c b/lib/libutil/login.c index b4e4d60f773d..fb87570b41ba 100644 --- a/lib/libutil/login.c +++ b/lib/libutil/login.c @@ -30,7 +30,7 @@ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * - * $Id: login.c,v 1.2 1994/02/23 09:56:47 rgrimes Exp $ + * $Id: login.c,v 1.3 1994/04/07 17:47:36 ache Exp $ */ #if defined(LIBC_SCCS) && !defined(lint) @@ -41,23 +41,42 @@ static char sccsid[] = "@(#)login.c 5.4 (Berkeley) 6/1/90"; #include <sys/file.h> #include <utmp.h> #include <stdio.h> +#include <unistd.h> +#include <ttyent.h> + +typedef struct utmp UTMP; void login(ut) - struct utmp *ut; + UTMP *ut; { register int fd; int tty; - off_t lseek(); + UTMP utmp; - tty = ttyslot(); - if (tty > 0 && (fd = open(_PATH_UTMP, O_WRONLY|O_CREAT, 0644)) >= 0) { - (void)lseek(fd, (long)(tty * sizeof(struct utmp)), L_SET); - (void)write(fd, (char *)ut, sizeof(struct utmp)); - (void)close(fd); + if ((fd = open(_PATH_UTMP, O_RDWR|O_CREAT, 0644)) >= 0) { + if ((tty = ttyslot()) > 0) { + (void)lseek(fd, (long)(tty * sizeof(UTMP)), L_SET); + (void)write(fd, (char *)ut, sizeof(UTMP)); + (void)close(fd); + } else { + setttyent(); + for (tty = 0; getttyent(); tty++) + ; + endttyent(); + (void)lseek(fd, (long)(tty * sizeof(UTMP)), L_SET); + while (read(fd, (char *)&utmp, sizeof(UTMP)) == sizeof(UTMP)) { + if (!utmp.ut_name[0]) { + (void)lseek(fd, -(long)sizeof(UTMP), L_INCR); + break; + } + } + (void)write(fd, (char *)ut, sizeof(UTMP)); + (void)close(fd); + } } if ((fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) >= 0) { - (void)write(fd, (char *)ut, sizeof(struct utmp)); + (void)write(fd, (char *)ut, sizeof(UTMP)); (void)close(fd); } } |