diff options
Diffstat (limited to 'usr.sbin/lastlogin/lastlogin.c')
| -rw-r--r-- | usr.sbin/lastlogin/lastlogin.c | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/usr.sbin/lastlogin/lastlogin.c b/usr.sbin/lastlogin/lastlogin.c new file mode 100644 index 0000000..2f8dd78 --- /dev/null +++ b/usr.sbin/lastlogin/lastlogin.c @@ -0,0 +1,152 @@ +/* + * 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_user(const void *, const void *); + +static int order = 1; +static const char *file = NULL; +static int (*utcmp)(const void *, const void *) = utcmp_user; + +static int +utcmp_user(const void *u1, const void *u2) +{ + + return (order * strcmp(((const struct utmpx *)u1)->ut_user, + ((const struct utmpx *)u2)->ut_user)); +} + +static int +utcmp_time(const void *u1, const void *u2) +{ + time_t t1, t2; + + t1 = ((const struct utmpx *)u1)->ut_tv.tv_sec; + t2 = ((const struct utmpx *)u2)->ut_tv.tv_sec; + return (t1 < t2 ? order : t1 > t2 ? -order : 0); +} + +int +main(int argc, char *argv[]) +{ + int ch, i, ulistsize; + struct utmpx *u, *ulist; + + while ((ch = getopt(argc, argv, "f:rt")) != -1) { + switch (ch) { + case 'f': + file = optarg; + break; + case 'r': + order = -1; + break; + case 't': + utcmp = utcmp_time; + break; + default: + usage(); + } + } + argc -= optind; + argv += optind; + + if (argc > 0) { + /* Process usernames given on the command line. */ + for (i = 0; i < argc; i++) { + if (setutxdb(UTXDB_LASTLOGIN, file) != 0) + err(1, "failed to open lastlog database"); + if ((u = getutxuser(argv[i])) == NULL) { + warnx("user '%s' not found", argv[i]); + continue; + } + output(u); + endutxent(); + } + } else { + /* Read all lastlog entries, looking for active ones. */ + if (setutxdb(UTXDB_LASTLOGIN, file) != 0) + err(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)); + if (ulist == NULL) + err(1, "malloc"); + } + 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 [-f file] [-rt] [user ...]\n"); + exit(1); +} |
