create utmp file if it does not exist (from shanzer@ritcsh.rit.edu)

[unix-history] / usr / src / lib / libutil / logout.c

diff --git a/usr/src/lib/libutil/logout.c b/usr/src/lib/libutil/logout.c
index 94326b7..ca493d8 100644 (file)
--- a/usr/src/lib/libutil/logout.c
+++ b/usr/src/lib/libutil/logout.c
@@ -16,40 +16,38 @@
  */
 
 #if defined(LIBC_SCCS) && !defined(lint)
  */
 
 #if defined(LIBC_SCCS) && !defined(lint)

-static char sccsid[] = "@(#)logout.c   5.3 (Berkeley) %G%";
+static char sccsid[] = "@(#)logout.c   5.4 (Berkeley) %G%";

 #endif /* LIBC_SCCS and not lint */
 
 #include <sys/types.h>
 #include <sys/file.h>
 #include <sys/time.h>
 #include <utmp.h>
 #endif /* LIBC_SCCS and not lint */
 
 #include <sys/types.h>
 #include <sys/file.h>
 #include <sys/time.h>
 #include <utmp.h>

-#include <stdio.h>

 
 

-/* 0 on failure, 1 on success */
+typedef struct utmp UTMP;

 
 logout(line)
        register char *line;
 {
 
 logout(line)
        register char *line;
 {

-       register FILE *fp;
-       struct utmp ut;
+       register int fd;
+       UTMP ut;

        int rval;
        int rval;

+       off_t lseek();

        time_t time();
 
        time_t time();
 

-       if (!(fp = fopen(_PATH_UTMP, "r+")))
+       if ((fd = open(_PATH_UTMP, O_RDWR)) < 0)

                return(0);
        rval = 0;
                return(0);
        rval = 0;

-       while (fread((char *)&ut, sizeof(struct utmp), 1, fp) == 1) {
-               if (!ut.ut_name[0] ||
-                   strncmp(ut.ut_line, line, sizeof(ut.ut_line)))
+       while (read(fd, (char *)&ut, sizeof(UTMP)) == sizeof(UTMP)) {
+               if (!ut.ut_name[0] || strncmp(ut.ut_line, line, UT_LINESIZE))

                        continue;
                        continue;

-               bzero(ut.ut_name, sizeof(ut.ut_name));
-               bzero(ut.ut_host, sizeof(ut.ut_host));
+               bzero(ut.ut_name, UT_NAMESIZE);
+               bzero(ut.ut_host, UT_HOSTSIZE);

                (void)time(&ut.ut_time);
                (void)time(&ut.ut_time);

-               (void)fseek(fp, (long)-sizeof(struct utmp), L_INCR);
-               (void)fwrite((char *)&ut, sizeof(struct utmp), 1, fp);
-               (void)fseek(fp, (long)0, L_INCR);
+               (void)lseek(fd, -(long)sizeof(UTMP), L_INCR);
+               (void)write(fd, (char *)&ut, sizeof(UTMP));

                rval = 1;
        }
                rval = 1;
        }

-       (void)fclose(fp);
+       (void)close(fd);

        return(rval);
 }
        return(rval);
 }