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Annotation of src/lib/libutil/logwtmp.c, Revision 1.10

1.10    ! lukem       1: /*     $NetBSD: logwtmp.c,v 1.9 1999/09/16 11:45:51 lukem Exp $        */
1.6       christos    2:
1.1       cgd         3: /*
1.3       cgd         4:  * Copyright (c) 1988, 1993
                      5:  *     The Regents of the University of California.  All rights reserved.
1.1       cgd         6:  *
                      7:  * Redistribution and use in source and binary forms, with or without
                      8:  * modification, are permitted provided that the following conditions
                      9:  * are met:
                     10:  * 1. Redistributions of source code must retain the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer.
                     12:  * 2. Redistributions in binary form must reproduce the above copyright
                     13:  *    notice, this list of conditions and the following disclaimer in the
                     14:  *    documentation and/or other materials provided with the distribution.
                     15:  * 3. All advertising materials mentioning features or use of this software
                     16:  *    must display the following acknowledgement:
                     17:  *     This product includes software developed by the University of
                     18:  *     California, Berkeley and its contributors.
                     19:  * 4. Neither the name of the University nor the names of its contributors
                     20:  *    may be used to endorse or promote products derived from this software
                     21:  *    without specific prior written permission.
                     22:  *
                     23:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     24:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     25:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     26:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     27:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     28:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     29:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     30:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     31:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     32:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     33:  * SUCH DAMAGE.
                     34:  */
                     35:
1.6       christos   36: #include <sys/cdefs.h>
1.1       cgd        37: #if defined(LIBC_SCCS) && !defined(lint)
1.5       jtc        38: #if 0
                     39: static char sccsid[] = "@(#)logwtmp.c  8.1 (Berkeley) 6/4/93";
                     40: #else
1.10    ! lukem      41: __RCSID("$NetBSD: logwtmp.c,v 1.9 1999/09/16 11:45:51 lukem Exp $");
1.5       jtc        42: #endif
1.1       cgd        43: #endif /* LIBC_SCCS and not lint */
                     44:
                     45: #include <sys/types.h>
                     46: #include <sys/file.h>
                     47: #include <sys/time.h>
                     48: #include <sys/stat.h>
1.3       cgd        49:
1.9       lukem      50: #include <assert.h>
1.4       pk         51: #include <string.h>
1.7       kleink     52: #include <time.h>
1.3       cgd        53: #include <unistd.h>
1.1       cgd        54: #include <utmp.h>
1.5       jtc        55: #include <util.h>
1.4       pk         56:
                     57: void
1.1       cgd        58: logwtmp(line, name, host)
1.5       jtc        59:        const char *line, *name, *host;
1.1       cgd        60: {
                     61:        struct utmp ut;
                     62:        struct stat buf;
                     63:        int fd;
1.9       lukem      64:
                     65:        _DIAGASSERT(line != NULL);
                     66:        _DIAGASSERT(name != NULL);
                     67:        _DIAGASSERT(host != NULL);
1.1       cgd        68:
                     69:        if ((fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) < 0)
                     70:                return;
                     71:        if (fstat(fd, &buf) == 0) {
                     72:                (void) strncpy(ut.ut_line, line, sizeof(ut.ut_line));
                     73:                (void) strncpy(ut.ut_name, name, sizeof(ut.ut_name));
                     74:                (void) strncpy(ut.ut_host, host, sizeof(ut.ut_host));
                     75:                (void) time(&ut.ut_time);
1.8       christos   76:                if (write(fd, &ut, sizeof(struct utmp)) != sizeof(struct utmp))
1.1       cgd        77:                        (void) ftruncate(fd, buf.st_size);
                     78:        }
                     79:        (void) close(fd);
                     80: }

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