256 lines
7.1 KiB
C
256 lines
7.1 KiB
C
/* $NetBSD: want.c,v 1.6 2006/02/28 17:17:43 ginsbach 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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static struct utmp *buf;
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static void onintr(int);
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static int want(struct utmp *, int);
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static const char *gethost(struct utmp *, const char *, int);
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static const char *
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/*ARGSUSED*/
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gethost(struct utmp *ut, const char *host, int numeric)
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{
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#if FIRSTVALID == 0
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return numeric ? "" : host;
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#else
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if (numeric) {
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static char buf[512];
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buf[0] = '\0';
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(void)sockaddr_snprintf(buf, sizeof(buf), "%a",
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(struct sockaddr *)&ut->ut_ss);
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return buf;
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} else
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return host;
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#endif
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}
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#define NULTERM(what) \
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if (check ## what) \
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(void)strlcpy(what ## p = what ## buf, bp->ut_ ## what, \
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sizeof(what ## buf)); \
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else \
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what ## p = bp->ut_ ## what
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/*
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* wtmp --
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* read through the wtmp file
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*/
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void
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wtmp(const char *file, int namesz, int linesz, int hostsz, int numeric)
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{
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struct utmp *bp; /* current structure */
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TTY *T; /* tty list entry */
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struct stat stb; /* stat of file for sz */
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time_t delta; /* time difference */
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off_t bl;
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int bytes, wfd;
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char *ct, *crmsg;
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size_t len = sizeof(*buf) * MAXUTMP;
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char namebuf[sizeof(bp->ut_name) + 1], *namep;
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char linebuf[sizeof(bp->ut_line) + 1], *linep;
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char hostbuf[sizeof(bp->ut_host) + 1], *hostp;
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int checkname = namesz > sizeof(bp->ut_name);
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int checkline = linesz > sizeof(bp->ut_line);
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int checkhost = hostsz > sizeof(bp->ut_host);
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if ((buf = malloc(len)) == NULL)
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err(1, "Cannot allocate utmp buffer");
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crmsg = NULL;
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if ((wfd = open(file, O_RDONLY, 0)) < 0 || fstat(wfd, &stb) == -1)
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err(1, "%s", file);
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bl = (stb.st_size + len - 1) / len;
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buf[FIRSTVALID].ut_timefld = time(NULL);
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(void)signal(SIGINT, onintr);
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(void)signal(SIGQUIT, onintr);
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while (--bl >= 0) {
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if (lseek(wfd, bl * len, SEEK_SET) == -1 ||
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(bytes = read(wfd, buf, len)) == -1)
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err(1, "%s", file);
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for (bp = &buf[bytes / sizeof(*buf) - 1]; bp >= buf; --bp) {
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NULTERM(name);
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NULTERM(line);
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NULTERM(host);
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/*
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* if the terminal line is '~', the machine stopped.
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* see utmp(5) for more info.
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*/
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if (linep[0] == '~' && !linep[1]) {
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/* everybody just logged out */
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for (T = ttylist; T; T = T->next)
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T->logout = -bp->ut_timefld;
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currentout = -bp->ut_timefld;
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crmsg = strncmp(namep, "shutdown",
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namesz) ? "crash" : "shutdown";
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if (want(bp, NO)) {
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ct = fmttime(bp->ut_timefld, fulltime);
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printf("%-*.*s %-*.*s %-*.*s %s\n",
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namesz, namesz, namep,
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linesz, linesz, linep,
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hostsz, hostsz,
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gethost(bp, hostp, numeric), ct);
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if (maxrec != -1 && !--maxrec)
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return;
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}
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continue;
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}
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/*
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* if the line is '{' or '|', date got set; see
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* utmp(5) for more info.
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*/
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if ((linep[0] == '{' || linep[0] == '|') && !linep[1]) {
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if (want(bp, NO)) {
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ct = fmttime(bp->ut_timefld, fulltime);
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printf("%-*.*s %-*.*s %-*.*s %s\n",
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namesz, namesz, namep,
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linesz, linesz, linep,
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hostsz, hostsz,
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gethost(bp, hostp, numeric),
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ct);
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if (maxrec && !--maxrec)
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return;
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}
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continue;
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}
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/* find associated tty */
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for (T = ttylist;; T = T->next) {
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if (!T) {
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/* add new one */
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T = addtty(linep);
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break;
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}
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if (!strncmp(T->tty, linep, LINESIZE))
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break;
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}
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if (TYPE(bp) == SIGNATURE)
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continue;
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if (namep[0] && want(bp, YES)) {
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ct = fmttime(bp->ut_timefld, fulltime);
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printf("%-*.*s %-*.*s %-*.*s %s ",
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namesz, namesz, namep,
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linesz, linesz, linep,
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hostsz, hostsz,
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gethost(bp, hostp, numeric),
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ct);
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if (!T->logout)
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puts(" still logged in");
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else {
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if (T->logout < 0) {
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T->logout = -T->logout;
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printf("- %s", crmsg);
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}
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else
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printf("- %s",
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fmttime(T->logout,
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fulltime | TIMEONLY));
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delta = T->logout - bp->ut_timefld;
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if (delta < SECSPERDAY)
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printf(" (%s)\n",
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fmttime(delta,
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fulltime | TIMEONLY | GMT));
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else
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printf(" (%ld+%s)\n",
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delta / SECSPERDAY,
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fmttime(delta,
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fulltime | TIMEONLY | GMT));
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}
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if (maxrec != -1 && !--maxrec)
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return;
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}
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T->logout = bp->ut_timefld;
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}
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}
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fulltime = 1; /* show full time */
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crmsg = fmttime(buf[FIRSTVALID].ut_timefld, FULLTIME);
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if ((ct = strrchr(file, '/')) != NULL)
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ct++;
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printf("\n%s begins %s\n", ct ? ct : file, crmsg);
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}
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/*
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* want --
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* see if want this entry
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*/
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static int
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want(struct utmp *bp, int check)
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{
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ARG *step;
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if (check) {
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/*
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* when uucp and ftp log in over a network, the entry in
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* the utmp file is the name plus their process id. See
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* etc/ftpd.c and usr.bin/uucp/uucpd.c for more information.
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*/
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if (!strncmp(bp->ut_line, "ftp", sizeof("ftp") - 1))
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bp->ut_line[3] = '\0';
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else if (!strncmp(bp->ut_line, "uucp", sizeof("uucp") - 1))
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bp->ut_line[4] = '\0';
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}
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if (!arglist)
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return (YES);
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for (step = arglist; step; step = step->next)
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switch(step->type) {
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case HOST_TYPE:
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if (!strncasecmp(step->name, bp->ut_host, HOSTSIZE))
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return (YES);
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break;
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case TTY_TYPE:
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if (!strncmp(step->name, bp->ut_line, LINESIZE))
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return (YES);
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break;
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case USER_TYPE:
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if (!strncmp(step->name, bp->ut_name, NAMESIZE))
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return (YES);
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break;
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}
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return (NO);
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}
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/*
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* onintr --
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* on interrupt, we inform the user how far we've gotten
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*/
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static void
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onintr(int signo)
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{
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printf("\ninterrupted %s\n", fmttime(buf[FIRSTVALID].ut_timefld,
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FULLTIME));
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if (signo == SIGINT)
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exit(1);
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(void)fflush(stdout); /* fix required for rsh */
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}
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