125 lines
3.5 KiB
C
125 lines
3.5 KiB
C
/*
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* Copyright (c) 1996 John M. Vinopal
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project
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* by John M. Vinopal.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$FreeBSD$");
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__RCSID("$NetBSD: lastlogin.c,v 1.4 1998/02/03 04:45:35 perry Exp $");
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#endif
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include <utmpx.h>
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int main(int, char **);
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static void output(struct utmpx *);
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static void usage(void);
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static int
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utcmp(const void *u1, const void *u2)
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{
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return (strcmp(((const struct utmpx *)u1)->ut_user,
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((const struct utmpx *)u2)->ut_user));
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}
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int
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main(int argc, char *argv[])
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{
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int ch, i, ulistsize;
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struct utmpx *u, *ulist;
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while ((ch = getopt(argc, argv, "")) != -1) {
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usage();
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}
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/* Process usernames given on the command line. */
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if (argc > 1) {
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for (i = 1; i < argc; ++i) {
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if (setutxdb(UTXDB_LASTLOGIN, NULL) != 0)
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errx(1, "failed to open lastlog database");
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if ((u = getutxuser(argv[i])) == NULL) {
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warnx("user '%s' not found", argv[i]);
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continue;
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}
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output(u);
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endutxent();
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}
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}
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/* Read all lastlog entries, looking for active ones */
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else {
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if (setutxdb(UTXDB_LASTLOGIN, NULL) != 0)
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errx(1, "failed to open lastlog database");
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ulist = NULL;
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ulistsize = 0;
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while ((u = getutxent()) != NULL) {
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if (u->ut_type != USER_PROCESS)
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continue;
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if ((ulistsize % 16) == 0) {
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ulist = realloc(ulist,
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(ulistsize + 16) * sizeof(struct utmpx));
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if (ulist == NULL)
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err(1, "malloc");
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}
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ulist[ulistsize++] = *u;
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}
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endutxent();
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qsort(ulist, ulistsize, sizeof(struct utmpx), utcmp);
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for (i = 0; i < ulistsize; i++)
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output(&ulist[i]);
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}
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exit(0);
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}
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/* Duplicate the output of last(1) */
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static void
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output(struct utmpx *u)
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{
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time_t t = u->ut_tv.tv_sec;
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printf("%-10s %-8s %-22.22s %s",
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u->ut_user, u->ut_line, u->ut_host, ctime(&t));
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}
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static void
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usage(void)
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{
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fprintf(stderr, "usage: lastlogin [user ...]\n");
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exit(1);
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}
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