386 lines
9.0 KiB
C
386 lines
9.0 KiB
C
/* $NetBSD: last.c,v 1.21 2003/08/07 11:14:17 agc Exp $ */
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/*
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* Copyright (c) 1987, 1993, 1994
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* The Regents of the University of California. 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. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, 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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__COPYRIGHT(
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"@(#) Copyright (c) 1987, 1993, 1994\n\
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The Regents of the University of California. All rights reserved.\n");
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)last.c 8.2 (Berkeley) 4/2/94";
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#endif
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__RCSID("$NetBSD: last.c,v 1.21 2003/08/07 11:14:17 agc Exp $");
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <err.h>
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#include <fcntl.h>
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#include <paths.h>
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#include <signal.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 <tzfile.h>
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#include <unistd.h>
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#ifdef SUPPORT_UTMPX
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#include <utmpx.h>
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#endif
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#ifdef SUPPORT_UTMP
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#include <utmp.h>
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#endif
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#ifndef UT_NAMESIZE
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#define UT_NAMESIZE 8
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#define UT_LINESIZE 8
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#define UT_HOSTSIZE 16
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#endif
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#ifndef SIGNATURE
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#define SIGNATURE -1
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#endif
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#define NO 0 /* false/no */
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#define YES 1 /* true/yes */
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#define TBUFLEN 30 /* length of time string buffer */
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#define TFMT "%a %b %d %R" /* strftime format string */
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#define LTFMT "%a %b %d %Y %T" /* strftime long format string */
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#define TFMTS "%R" /* strftime format string - time only */
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#define LTFMTS "%T" /* strftime long format string - " */
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/* fmttime() flags */
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#define FULLTIME 0x1 /* show year, seconds */
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#define TIMEONLY 0x2 /* show time only, not date */
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#define GMT 0x4 /* show time at GMT, for offsets only */
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#define MAXUTMP 1024;
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typedef struct arg {
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char *name; /* argument */
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#define HOST_TYPE -2
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#define TTY_TYPE -3
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#define USER_TYPE -4
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int type; /* type of arg */
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struct arg *next; /* linked list pointer */
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} ARG;
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static ARG *arglist; /* head of linked list */
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typedef struct ttytab {
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time_t logout; /* log out time */
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char tty[128]; /* terminal name */
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struct ttytab *next; /* linked list pointer */
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} TTY;
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static TTY *ttylist; /* head of linked list */
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static time_t currentout; /* current logout value */
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static long maxrec; /* records to display */
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static int fulltime = 0; /* Display seconds? */
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int main(int, char *[]);
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static void addarg(int, char *);
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static TTY *addtty(const char *);
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static void hostconv(char *);
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static char *ttyconv(char *);
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#ifdef SUPPORT_UTMPX
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static void wtmpx(const char *, int, int, int);
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#endif
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#ifdef SUPPORT_UTMP
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static void wtmp(const char *, int, int, int);
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#endif
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static char *fmttime(time_t, int);
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static void usage(void);
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static
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void usage(void)
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{
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(void)fprintf(stderr, "Usage: %s [-#%s] [-T] [-f file]"
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" [-H hostsize] [-h host] [-L linesize]\n"
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"\t [-N namesize] [-t tty] [user ...]\n", getprogname(),
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#ifdef NOTYET_SUPPORT_UTMPX
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"w"
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#else
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""
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#endif
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);
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exit(1);
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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;
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char *p;
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char *file = NULL;
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int namesize = UT_NAMESIZE;
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int linesize = UT_LINESIZE;
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int hostsize = UT_HOSTSIZE;
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maxrec = -1;
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while ((ch = getopt(argc, argv, "0123456789f:H:h:L:N:Tt:")) != -1)
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switch (ch) {
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case '0': case '1': case '2': case '3': case '4':
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case '5': case '6': case '7': case '8': case '9':
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/*
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* kludge: last was originally designed to take
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* a number after a dash.
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*/
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if (maxrec == -1) {
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p = argv[optind - 1];
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if (p[0] == '-' && p[1] == ch && !p[2])
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maxrec = atol(++p);
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else
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maxrec = atol(argv[optind] + 1);
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if (!maxrec)
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exit(0);
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}
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break;
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case 'f':
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file = optarg;
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break;
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case 'H':
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hostsize = atoi(optarg);
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break;
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case 'h':
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hostconv(optarg);
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addarg(HOST_TYPE, optarg);
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break;
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case 'L':
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linesize = atoi(optarg);
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break;
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case 'N':
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namesize = atoi(optarg);
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break;
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case 'T':
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fulltime = 1;
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break;
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case 't':
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addarg(TTY_TYPE, ttyconv(optarg));
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break;
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case '?':
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default:
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usage();
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}
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if (argc) {
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setlinebuf(stdout);
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for (argv += optind; *argv; ++argv) {
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#define COMPATIBILITY
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#ifdef COMPATIBILITY
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/* code to allow "last p5" to work */
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addarg(TTY_TYPE, ttyconv(*argv));
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#endif
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addarg(USER_TYPE, *argv);
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}
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}
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if (file == NULL) {
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#ifdef SUPPORT_UTMPX
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if (access(_PATH_WTMPX, R_OK) == 0)
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file = _PATH_WTMPX;
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else
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#endif
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#ifdef SUPPORT_UTMP
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if (access(_PATH_WTMP, R_OK) == 0)
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file = _PATH_WTMP;
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#endif
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if (file == NULL)
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#if defined(SUPPORT_UTMPX) && defined(SUPPORT_UTMP)
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errx(1, "Cannot access `%s' or `%s'", _PATH_WTMPX,
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_PATH_WTMP);
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#elif defined(SUPPORT_UTMPX)
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errx(1, "Cannot access `%s'", _PATH_WTMPX);
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#elif defined(SUPPORT_UTMP)
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errx(1, "Cannot access `%s'", _PATH_WTMP);
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#else
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errx(1, "No utmp or utmpx support compiled in.");
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#endif
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}
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#if defined(SUPPORT_UTMPX) && defined(SUPPORT_UTMP)
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if (file[strlen(file) - 1] == 'x')
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wtmpx(file, namesize, linesize, hostsize);
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else
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wtmp(file, namesize, linesize, hostsize);
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#elif defined(SUPPORT_UTMPX)
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wtmpx(file, namesize, linesize, hostsize);
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#elif defined(SUPPORT_UTMP)
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wtmp(file, namesize, linesize, hostsize);
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#else
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errx(1, "No utmp or utmpx support compiled in.");
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#endif
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exit(0);
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}
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/*
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* addarg --
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* add an entry to a linked list of arguments
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*/
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static void
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addarg(int type, char *arg)
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{
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ARG *cur;
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if (!(cur = (ARG *)malloc((u_int)sizeof(ARG))))
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err(1, "malloc failure");
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cur->next = arglist;
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cur->type = type;
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cur->name = arg;
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arglist = cur;
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}
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/*
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* addtty --
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* add an entry to a linked list of ttys
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*/
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static TTY *
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addtty(const char *ttyname)
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{
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TTY *cur;
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if (!(cur = (TTY *)malloc((u_int)sizeof(TTY))))
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err(1, "malloc failure");
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cur->next = ttylist;
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cur->logout = currentout;
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memmove(cur->tty, ttyname, sizeof(cur->tty));
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return (ttylist = cur);
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}
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/*
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* hostconv --
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* convert the hostname to search pattern; if the supplied host name
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* has a domain attached that is the same as the current domain, rip
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* off the domain suffix since that's what login(1) does.
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*/
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static void
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hostconv(char *arg)
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{
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static int first = 1;
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static char *hostdot, name[MAXHOSTNAMELEN + 1];
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char *argdot;
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if (!(argdot = strchr(arg, '.')))
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return;
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if (first) {
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first = 0;
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if (gethostname(name, sizeof(name)))
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err(1, "gethostname");
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name[sizeof(name) - 1] = '\0';
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hostdot = strchr(name, '.');
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}
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if (hostdot && !strcasecmp(hostdot, argdot))
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*argdot = '\0';
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}
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/*
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* ttyconv --
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* convert tty to correct name.
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*/
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static char *
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ttyconv(char *arg)
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{
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char *mval;
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/*
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* kludge -- we assume that all tty's end with
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* a two character suffix.
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*/
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if (strlen(arg) == 2) {
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if (!strcmp(arg, "co"))
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mval = strdup("console");
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else
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asprintf(&mval, "tty%s", arg);
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if (!mval)
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err(1, "malloc failure");
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return (mval);
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}
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if (!strncmp(arg, _PATH_DEV, sizeof(_PATH_DEV) - 1))
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return (arg + 5);
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return (arg);
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}
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/*
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* fmttime --
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* return pointer to (static) formatted time string.
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*/
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static char *
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fmttime(time_t t, int flags)
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{
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struct tm *tm;
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static char tbuf[TBUFLEN];
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tm = (flags & GMT) ? gmtime(&t) : localtime(&t);
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strftime(tbuf, sizeof(tbuf),
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(flags & TIMEONLY)
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? (flags & FULLTIME ? LTFMTS : TFMTS)
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: (flags & FULLTIME ? LTFMT : TFMT),
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tm);
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return (tbuf);
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}
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#ifdef SUPPORT_UTMP
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#define TYPE(a) 0
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#define NAMESIZE UT_NAMESIZE
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#define LINESIZE UT_LINESIZE
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#define HOSTSIZE UT_HOSTSIZE
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#define ut_timefld ut_time
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#define FIRSTVALID 0
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#include "want.c"
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#undef TYPE /*(a)*/
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#undef NAMESIZE
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#undef LINESIZE
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#undef HOSTSIZE
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#undef ut_timefld
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#undef FIRSTVALID
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#endif
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#ifdef SUPPORT_UTMPX
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#define utmp utmpx
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#define want wantx
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#define wtmp wtmpx
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#define buf bufx
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#define onintr onintrx
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#define TYPE(a) (a)->ut_type
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#define NAMESIZE UTX_USERSIZE
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#define LINESIZE UTX_LINESIZE
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#define HOSTSIZE UTX_HOSTSIZE
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#define ut_timefld ut_xtime
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#define FIRSTVALID 1
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#include "want.c"
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#endif
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