14902917f6
It this were to actually happen, then others parts would go into infinite loop. Also, fix KNF. Found while checking Coverity CID 3784.
587 lines
13 KiB
C
587 lines
13 KiB
C
/* $NetBSD: ac.c,v 1.23 2006/05/26 02:16:17 jnemeth Exp $ */
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/*
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* Copyright (c) 1994 Christopher G. Demetriou
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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
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* NetBSD Project. See http://www.NetBSD.org/ for
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* information about NetBSD.
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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, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* <<Id: LICENSE,v 1.2 2000/06/14 15:57:33 cgd Exp>>
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*
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*
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* @(#)Copyright (c) 1994, Simon J. Gerraty.
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*
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* This is free software. It comes with NO WARRANTY.
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* Permission to use, modify and distribute this source code
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* is granted subject to the following conditions.
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* 1/ that the above copyright notice and this notice
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* are preserved in all copies and that due credit be given
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* to the author.
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* 2/ that any changes to this code are clearly commented
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* as such so that the author does not get blamed for bugs
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* other than his own.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: ac.c,v 1.23 2006/05/26 02:16:17 jnemeth Exp $");
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#endif
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#include <sys/types.h>
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#include <err.h>
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#include <errno.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <time.h>
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#include <utmp.h>
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#include <ttyent.h>
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/*
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* this is for our list of currently logged in sessions
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*/
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struct utmp_list {
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struct utmp_list *next;
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struct utmp usr;
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};
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/*
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* this is for our list of users that are accumulating time.
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*/
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struct user_list {
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struct user_list *next;
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char name[UT_NAMESIZE+1];
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time_t secs;
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};
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/*
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* this is for chosing whether to ignore a login
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*/
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struct tty_list {
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struct tty_list *next;
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char name[UT_LINESIZE+3];
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int len;
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int ret;
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};
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/*
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* globals - yes yuk
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*/
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static time_t Total = 0;
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static time_t FirstTime = 0;
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static int Flags = 0;
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static struct user_list *Users = NULL;
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static struct tty_list *Ttys = NULL;
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static int Maxcon = 0, Ncon = 0;
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static char (*Con)[UT_LINESIZE] = NULL;
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#define NEW(type) (type *)malloc(sizeof (type))
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#define is_login_tty(line) \
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(bsearch(line, Con, Ncon, sizeof(Con[0]), compare) != NULL)
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#define AC_W 1 /* not _PATH_WTMP */
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#define AC_D 2 /* daily totals (ignore -p) */
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#define AC_P 4 /* per-user totals */
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#define AC_U 8 /* specified users only */
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#define AC_T 16 /* specified ttys only */
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#ifdef DEBUG
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static int Debug = 0;
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#endif
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static int ac(FILE *);
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static struct tty_list *add_tty(char *);
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static int do_tty(char *);
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static FILE *file(const char *);
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static struct utmp_list *log_in(struct utmp_list *, struct utmp *);
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static struct utmp_list *log_out(struct utmp_list *, struct utmp *);
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#ifdef notdef
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static int on_console(struct utmp_list *);
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#endif
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static void find_login_ttys(void);
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static void show(const char *, time_t);
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static void show_today(struct user_list *, struct utmp_list *,
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time_t);
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static void show_users(struct user_list *);
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static struct user_list *update_user(struct user_list *, char *, time_t);
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static int compare(const void *, const void *);
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static void usage(void);
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/*
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* open wtmp or die
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*/
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static FILE *
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file(const char *name)
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{
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FILE *fp;
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if (strcmp(name, "-") == 0)
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fp = stdin;
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else if ((fp = fopen(name, "r")) == NULL)
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err(1, "%s", name);
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/* in case we want to discriminate */
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if (strcmp(_PATH_WTMP, name))
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Flags |= AC_W;
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return fp;
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}
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static struct tty_list *
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add_tty(char *name)
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{
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struct tty_list *tp;
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char *rcp;
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Flags |= AC_T;
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if ((tp = NEW(struct tty_list)) == NULL)
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err(1, "malloc");
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tp->len = 0; /* full match */
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tp->ret = 1; /* do if match */
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if (*name == '!') { /* don't do if match */
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tp->ret = 0;
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name++;
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}
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(void)strlcpy(tp->name, name, sizeof (tp->name));
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if ((rcp = strchr(tp->name, '*')) != NULL) { /* wild card */
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*rcp = '\0';
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tp->len = strlen(tp->name); /* match len bytes only */
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}
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tp->next = Ttys;
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Ttys = tp;
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return Ttys;
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}
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/*
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* should we process the named tty?
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*/
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static int
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do_tty(char *name)
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{
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struct tty_list *tp;
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int def_ret = 0;
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for (tp = Ttys; tp != NULL; tp = tp->next) {
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if (tp->ret == 0) /* specific don't */
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def_ret = 1; /* default do */
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if (tp->len != 0) {
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if (strncmp(name, tp->name, tp->len) == 0)
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return tp->ret;
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} else {
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if (strncmp(name, tp->name, sizeof (tp->name)) == 0)
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return tp->ret;
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}
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}
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return def_ret;
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}
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static int
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compare(const void *a, const void *b)
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{
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return strncmp(a, b, UT_LINESIZE);
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}
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/*
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* Deal correctly with multiple virtual consoles/login ttys.
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* We read the ttyent's from /etc/ttys and classify as login
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* ttys ones that are running getty and they are turned on.
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*/
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static void
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find_login_ttys(void)
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{
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struct ttyent *tty;
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char (*nCon)[UT_LINESIZE];
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if ((Con = malloc((Maxcon = 10) * sizeof(Con[0]))) == NULL)
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err(1, "malloc");
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setttyent();
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while ((tty = getttyent()) != NULL)
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if ((tty->ty_status & TTY_ON) != 0 &&
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strstr(tty->ty_getty, "getty") != NULL) {
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if (Ncon == Maxcon) {
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if ((nCon = realloc(Con, (Maxcon + 10) *
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sizeof(Con[0]))) == NULL)
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err(1, "malloc");
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Con = nCon;
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Maxcon += 10;
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}
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(void)strncpy(Con[Ncon++], tty->ty_name, UT_LINESIZE);
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}
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endttyent();
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qsort(Con, Ncon, sizeof(Con[0]), compare);
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}
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#ifdef notdef
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/*
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* is someone logged in on Console/login tty?
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*/
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static int
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on_console(struct utmp_list *head)
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{
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struct utmp_list *up;
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for (up = head; up; up = up->next)
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if (is_login_tty(up->usr.ut_line))
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return 1;
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return 0;
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}
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#endif
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/*
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* update user's login time
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*/
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static struct user_list *
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update_user(struct user_list *head, char *name, time_t secs)
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{
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struct user_list *up;
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for (up = head; up != NULL; up = up->next) {
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if (strncmp(up->name, name, sizeof (up->name) - 1) == 0) {
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up->secs += secs;
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Total += secs;
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return head;
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}
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}
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/*
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* not found so add new user unless specified users only
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*/
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if (Flags & AC_U)
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return head;
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if ((up = NEW(struct user_list)) == NULL)
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err(1, "malloc");
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up->next = head;
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(void)strlcpy(up->name, name, sizeof (up->name));
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up->secs = secs;
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Total += secs;
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return up;
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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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FILE *fp;
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int c;
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fp = NULL;
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while ((c = getopt(argc, argv, "Ddpt:w:")) != -1) {
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switch (c) {
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#ifdef DEBUG
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case 'D':
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Debug++;
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break;
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#endif
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case 'd':
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Flags |= AC_D;
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break;
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case 'p':
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Flags |= AC_P;
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break;
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case 't': /* only do specified ttys */
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add_tty(optarg);
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break;
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case 'w':
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fp = file(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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}
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find_login_ttys();
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if (optind < argc) {
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/*
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* initialize user list
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*/
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for (; optind < argc; optind++) {
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Users = update_user(Users, argv[optind], 0L);
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}
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Flags |= AC_U; /* freeze user list */
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}
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if (Flags & AC_D)
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Flags &= ~AC_P;
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if (fp == NULL) {
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/*
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* if _PATH_WTMP does not exist, exit quietly
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*/
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if (access(_PATH_WTMP, 0) != 0 && errno == ENOENT)
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return 0;
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fp = file(_PATH_WTMP);
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}
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ac(fp);
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return 0;
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}
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/*
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* print login time in decimal hours
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*/
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static void
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show(const char *name, time_t secs)
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{
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(void)printf("\t%-*s %8.2f\n", UT_NAMESIZE, name,
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((double)secs / 3600));
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}
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static void
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show_users(struct user_list *list)
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{
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struct user_list *lp;
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for (lp = list; lp; lp = lp->next)
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show(lp->name, lp->secs);
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}
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/*
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* print total login time for 24hr period in decimal hours
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*/
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static void
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show_today(struct user_list *users, struct utmp_list *logins, time_t secs)
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{
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struct user_list *up;
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struct utmp_list *lp;
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char date[64];
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time_t yesterday = secs - 1;
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(void)strftime(date, sizeof (date), "%b %e total",
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localtime(&yesterday));
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/* restore the missing second */
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yesterday++;
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for (lp = logins; lp != NULL; lp = lp->next) {
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secs = yesterday - lp->usr.ut_time;
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Users = update_user(Users, lp->usr.ut_name, secs);
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lp->usr.ut_time = yesterday; /* as if they just logged in */
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}
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secs = 0;
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for (up = users; up != NULL; up = up->next) {
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secs += up->secs;
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up->secs = 0; /* for next day */
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}
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if (secs)
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(void)printf("%s %11.2f\n", date, ((double)secs / 3600));
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}
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/*
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* log a user out and update their times.
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* if ut_line is "~", we log all users out as the system has
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* been shut down.
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*/
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static struct utmp_list *
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log_out(struct utmp_list *head, struct utmp *up)
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{
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struct utmp_list *lp, *lp2, *tlp;
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time_t secs;
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for (lp = head, lp2 = NULL; lp != NULL; )
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if (*up->ut_line == '~' || strncmp(lp->usr.ut_line, up->ut_line,
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sizeof (up->ut_line)) == 0) {
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secs = up->ut_time - lp->usr.ut_time;
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Users = update_user(Users, lp->usr.ut_name, secs);
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#ifdef DEBUG
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if (Debug)
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printf("%-.*s %-.*s: %-.*s logged out (%2d:%02d:%02d)\n",
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19, ctime(&up->ut_time),
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sizeof (lp->usr.ut_line), lp->usr.ut_line,
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sizeof (lp->usr.ut_name), lp->usr.ut_name,
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secs / 3600, (secs % 3600) / 60, secs % 60);
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#endif
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/*
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* now lose it
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*/
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tlp = lp;
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lp = lp->next;
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if (tlp == head) {
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head = lp;
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} else if (lp2 != NULL)
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lp2->next = lp;
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free(tlp);
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} else {
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lp2 = lp;
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lp = lp->next;
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}
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return head;
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}
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/*
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* if do_tty says ok, login a user
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*/
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struct utmp_list *
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log_in(struct utmp_list *head, struct utmp *up)
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{
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struct utmp_list *lp;
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/*
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* If we are doing specified ttys only, we ignore
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* anything else.
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*/
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if (Flags & AC_T)
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if (!do_tty(up->ut_line))
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return head;
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/*
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* go ahead and log them in
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*/
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if ((lp = NEW(struct utmp_list)) == NULL)
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err(1, "malloc");
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lp->next = head;
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head = lp;
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memmove((char *)&lp->usr, (char *)up, sizeof (struct utmp));
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#ifdef DEBUG
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if (Debug) {
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printf("%-.*s %-.*s: %-.*s logged in", 19,
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ctime(&lp->usr.ut_time), sizeof (up->ut_line),
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up->ut_line, sizeof (up->ut_name), up->ut_name);
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if (*up->ut_host)
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printf(" (%-.*s)", sizeof (up->ut_host), up->ut_host);
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putchar('\n');
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}
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#endif
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return head;
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}
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static int
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ac(FILE *fp)
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{
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struct utmp_list *lp, *head = NULL;
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struct utmp usr;
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struct tm *ltm;
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time_t secs = 0;
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int day = -1;
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while (fread((char *)&usr, sizeof(usr), 1, fp) == 1) {
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if (!FirstTime)
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FirstTime = usr.ut_time;
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if (Flags & AC_D) {
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ltm = localtime(&usr.ut_time);
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if (day >= 0 && day != ltm->tm_yday) {
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day = ltm->tm_yday;
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/*
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* print yesterday's total
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*/
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secs = usr.ut_time;
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secs -= ltm->tm_sec;
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secs -= 60 * ltm->tm_min;
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secs -= 3600 * ltm->tm_hour;
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show_today(Users, head, secs);
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} else
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day = ltm->tm_yday;
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}
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switch(*usr.ut_line) {
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case '|':
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secs = usr.ut_time;
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break;
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case '{':
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secs -= usr.ut_time;
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/*
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* adjust time for those logged in
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*/
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for (lp = head; lp != NULL; lp = lp->next)
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lp->usr.ut_time -= secs;
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break;
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case '~': /* reboot or shutdown */
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head = log_out(head, &usr);
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FirstTime = usr.ut_time; /* shouldn't be needed */
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break;
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default:
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/*
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* if they came in on tty[p-y]*, then it is only
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* a login session if the ut_host field is non-empty,
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* or this tty is a login tty [eg. a console]
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*/
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if (*usr.ut_name) {
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if ((strncmp(usr.ut_line, "tty", 3) != 0 &&
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strncmp(usr.ut_line, "dty", 3) != 0) ||
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strchr("pqrstuvwxyzPQRST", usr.ut_line[3]) == 0 ||
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*usr.ut_host != '\0' ||
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is_login_tty(usr.ut_line))
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head = log_in(head, &usr);
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#ifdef DEBUG
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else if (Debug)
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printf("%-.*s %-.*s: %-.*s ignored\n",
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19, ctime(&usr.ut_time),
|
|
sizeof (usr.ut_line), usr.ut_line,
|
|
sizeof (usr.ut_name), usr.ut_name);
|
|
#endif
|
|
} else
|
|
head = log_out(head, &usr);
|
|
break;
|
|
}
|
|
}
|
|
(void)fclose(fp);
|
|
usr.ut_time = time((time_t *)0);
|
|
(void)strcpy(usr.ut_line, "~");
|
|
|
|
if (Flags & AC_D) {
|
|
ltm = localtime(&usr.ut_time);
|
|
if (day >= 0 && day != ltm->tm_yday) {
|
|
/*
|
|
* print yesterday's total
|
|
*/
|
|
secs = usr.ut_time;
|
|
secs -= ltm->tm_sec;
|
|
secs -= 60 * ltm->tm_min;
|
|
secs -= 3600 * ltm->tm_hour;
|
|
show_today(Users, head, secs);
|
|
}
|
|
}
|
|
/*
|
|
* anyone still logged in gets time up to now
|
|
*/
|
|
head = log_out(head, &usr);
|
|
|
|
if (Flags & AC_D)
|
|
show_today(Users, head, time((time_t *)0));
|
|
else {
|
|
if (Flags & AC_P)
|
|
show_users(Users);
|
|
show("total", Total);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
|
|
(void)fprintf(stderr,
|
|
"usage: %s [-d | -p] [-t tty] [-w wtmp] [users ...]\n",
|
|
getprogname());
|
|
exit(1);
|
|
}
|