aacd7d6afc
According to the manpage, the entries have to be sorted by uid. This is no longer possible, since our utmpx implementation is completely unaware of user IDs. You can safely add entries for multiple users sharing the same uid. Make the output less random by sorting everything by name.
122 lines
3.4 KiB
C
122 lines
3.4 KiB
C
/*
|
|
* Copyright (c) 1996 John M. Vinopal
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed for the NetBSD Project
|
|
* by John M. Vinopal.
|
|
* 4. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#ifndef lint
|
|
__RCSID("$FreeBSD$");
|
|
__RCSID("$NetBSD: lastlogin.c,v 1.4 1998/02/03 04:45:35 perry Exp $");
|
|
#endif
|
|
|
|
#include <err.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <time.h>
|
|
#include <unistd.h>
|
|
#include <utmpx.h>
|
|
|
|
int main(int, char **);
|
|
static void output(struct utmpx *);
|
|
static void usage(void);
|
|
|
|
static int
|
|
utcmp(const void *u1, const void *u2)
|
|
{
|
|
|
|
return (strcmp(((const struct utmpx *)u1)->ut_user,
|
|
((const struct utmpx *)u2)->ut_user));
|
|
}
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
int ch, i, ulistsize;
|
|
struct utmpx *u, *ulist;
|
|
|
|
while ((ch = getopt(argc, argv, "")) != -1) {
|
|
usage();
|
|
}
|
|
|
|
/* Process usernames given on the command line. */
|
|
if (argc > 1) {
|
|
for (i = 1; i < argc; ++i) {
|
|
if (setutxdb(UTXDB_LASTLOGIN, NULL) != 0)
|
|
errx(1, "failed to open lastlog database");
|
|
if ((u = getutxuser(argv[i])) == NULL) {
|
|
warnx("user '%s' not found", argv[i]);
|
|
continue;
|
|
}
|
|
output(u);
|
|
endutxent();
|
|
}
|
|
}
|
|
/* Read all lastlog entries, looking for active ones */
|
|
else {
|
|
if (setutxdb(UTXDB_LASTLOGIN, NULL) != 0)
|
|
errx(1, "failed to open lastlog database");
|
|
ulist = NULL;
|
|
ulistsize = 0;
|
|
while ((u = getutxent()) != NULL) {
|
|
if (u->ut_type != USER_PROCESS)
|
|
continue;
|
|
if ((ulistsize % 16) == 0)
|
|
ulist = realloc(ulist,
|
|
(ulistsize + 16) * sizeof(struct utmpx));
|
|
ulist[ulistsize++] = *u;
|
|
}
|
|
endutxent();
|
|
|
|
qsort(ulist, ulistsize, sizeof(struct utmpx), utcmp);
|
|
for (i = 0; i < ulistsize; i++)
|
|
output(&ulist[i]);
|
|
}
|
|
|
|
exit(0);
|
|
}
|
|
|
|
/* Duplicate the output of last(1) */
|
|
static void
|
|
output(struct utmpx *u)
|
|
{
|
|
time_t t = u->ut_tv.tv_sec;
|
|
|
|
printf("%-10s %-8s %-22.22s %s",
|
|
u->ut_user, u->ut_line, u->ut_host, ctime(&t));
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
fprintf(stderr, "usage: lastlogin [user ...]\n");
|
|
exit(1);
|
|
}
|