558 lines
11 KiB
C
558 lines
11 KiB
C
/*
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* Copyright (c) 1994 Christopher G. Demetriou.
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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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#ifndef lint
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static char rcsid[] = "$Id: ac.c,v 1.1.1.1 1994/05/18 08:00:45 csgr Exp $";
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#endif
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#include <sys/types.h>
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#include <sys/file.h>
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#include <sys/time.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 <stdlib.h>
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#include <string.h>
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#include <utmp.h>
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#include <unistd.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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#ifdef CONSOLE_TTY
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static char *Console = CONSOLE_TTY;
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#endif
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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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#define NEW(type) (type *)malloc(sizeof (type))
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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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int main __P((int, char **));
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int ac __P((FILE *));
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struct tty_list *add_tty __P((char *));
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int do_tty __P((char *));
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FILE *file __P((char *));
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struct utmp_list *log_in __P((struct utmp_list *, struct utmp *));
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struct utmp_list *log_out __P((struct utmp_list *, struct utmp *));
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int on_console __P((struct utmp_list *));
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void show __P((char *, time_t));
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void show_today __P((struct user_list *, struct utmp_list *,
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time_t));
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void show_users __P((struct user_list *));
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struct user_list *update_user __P((struct user_list *, char *, time_t));
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void usage __P((void));
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/*
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* open wtmp or die
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*/
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FILE *
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file(name)
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char *name;
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{
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FILE *fp;
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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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struct tty_list *
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add_tty(name)
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char *name;
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{
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struct tty_list *tp;
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register 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)strncpy(tp->name, name, sizeof (tp->name) - 1);
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tp->name[sizeof (tp->name) - 1] = '\0';
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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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int
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do_tty(name)
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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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#ifdef CONSOLE_TTY
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/*
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* is someone logged in on Console?
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*/
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int
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on_console(head)
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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 (strncmp(up->usr.ut_line, Console,
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sizeof (up->usr.ut_line)) == 0)
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return 1;
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}
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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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struct user_list *
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update_user(head, name, secs)
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struct user_list *head;
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char *name;
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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)) == 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)strncpy(up->name, name, sizeof (up->name) - 1);
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up->name[sizeof (up->name) - 1] = '\0'; /* paranoid! */
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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(argc, argv)
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int argc;
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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, "Dc:dpt:w:")) != EOF) {
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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 'c':
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#ifdef CONSOLE_TTY
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Console = optarg;
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#else
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usage(); /* XXX */
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#endif
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break;
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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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break;
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}
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}
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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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void
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show(name, secs)
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char *name;
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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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void
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show_users(list)
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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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void
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show_today(users, logins, secs)
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struct user_list *users;
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struct utmp_list *logins;
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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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struct utmp_list *
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log_out(head, up)
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struct utmp_list *head;
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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(head, up)
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struct utmp_list *head;
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struct utmp *up;
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{
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struct utmp_list *lp;
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/*
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* this could be a login. if we're not dealing with
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* the console name, say it is.
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*
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* If we are, and if ut_host==":0.0" we know that it
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* isn't a real login. _But_ if we have not yet recorded
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* someone being logged in on Console - due to the wtmp
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* file starting after they logged in, we'll pretend they
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* logged in, at the start of the wtmp file.
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*/
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#ifdef CONSOLE_TTY
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if (up->ut_host[0] == ':') {
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/*
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* SunOS 4.0.2 does not treat ":0.0" as special but we
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* do.
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*/
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if (on_console(head))
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return head;
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/*
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* ok, no recorded login, so they were here when wtmp
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* started! Adjust ut_time!
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*/
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up->ut_time = FirstTime;
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/*
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* this allows us to pick the right logout
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*/
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(void)strncpy(up->ut_line, Console, sizeof (up->ut_line) - 1);
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up->ut_line[sizeof (up->ut_line) - 1] = '\0'; /* paranoid! */
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}
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#endif
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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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int
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ac(fp)
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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;
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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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*/
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if (*usr.ut_name) {
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if (strncmp(usr.ut_line, "tty", 3) != 0 ||
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strchr("pqrstuvwxy", usr.ut_line[3]) == 0 ||
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*usr.ut_host != '\0')
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head = log_in(head, &usr);
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} else
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head = log_out(head, &usr);
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break;
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}
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}
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(void)fclose(fp);
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usr.ut_time = time((time_t *)0);
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(void)strcpy(usr.ut_line, "~");
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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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/*
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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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}
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}
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/*
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* anyone still logged in gets time up to now
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*/
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head = log_out(head, &usr);
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if (Flags & AC_D)
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show_today(Users, head, time((time_t *)0));
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else {
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if (Flags & AC_P)
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show_users(Users);
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show("total", Total);
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}
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return 0;
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}
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void
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usage()
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{
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(void)fprintf(stderr,
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#ifdef CONSOLE_TTY
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"ac [-dp] [-c console] [-t tty] [-w wtmp] [users ...]\n");
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#else
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"ac [-dp] [-t tty] [-w wtmp] [users ...]\n");
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#endif
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exit(1);
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}
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