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Annotation of 43BSDReno/libexec/ftpd/logwtmp.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1988 The Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms are permitted
                      6:  * provided that: (1) source distributions retain this entire copyright
                      7:  * notice and comment, and (2) distributions including binaries display
                      8:  * the following acknowledgement:  ``This product includes software
                      9:  * developed by the University of California, Berkeley and its contributors''
                     10:  * in the documentation or other materials provided with the distribution
                     11:  * and in all advertising materials mentioning features or use of this
                     12:  * software. Neither the name of the University nor the names of its
                     13:  * contributors may be used to endorse or promote products derived
                     14:  * from this software without specific prior written permission.
                     15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     16:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     18:  *
                     19:  */
                     20: 
                     21: #ifndef lint
                     22: static char sccsid[] = "@(#)logwtmp.c  5.6 (Berkeley) 6/1/90";
                     23: #endif /* not lint */
                     24: 
                     25: #include <sys/types.h>
                     26: #include <sys/file.h>
                     27: #include <sys/time.h>
                     28: #include <sys/stat.h>
                     29: #include <utmp.h>
                     30: 
                     31: static int fd = -1;
                     32: 
                     33: /*
                     34:  * Modified version of logwtmp that holds wtmp file open
                     35:  * after first call, for use with ftp (which may chroot
                     36:  * after login, but before logout).
                     37:  */
                     38: logwtmp(line, name, host)
                     39:        char *line, *name, *host;
                     40: {
                     41:        struct utmp ut;
                     42:        struct stat buf;
                     43:        time_t time();
                     44:        char *strncpy();
                     45: 
                     46:        if (fd < 0 && (fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) < 0)
                     47:                return;
                     48:        if (fstat(fd, &buf) == 0) {
                     49:                (void)strncpy(ut.ut_line, line, sizeof(ut.ut_line));
                     50:                (void)strncpy(ut.ut_name, name, sizeof(ut.ut_name));
                     51:                (void)strncpy(ut.ut_host, host, sizeof(ut.ut_host));
                     52:                (void)time(&ut.ut_time);
                     53:                if (write(fd, (char *)&ut, sizeof(struct utmp)) !=
                     54:                    sizeof(struct utmp))
                     55:                        (void)ftruncate(fd, buf.st_size);
                     56:        }
                     57: }

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