8a16b7a18f
Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
250 lines
6.3 KiB
C
250 lines
6.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1983, 1993 The Regents of the University of California.
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* Copyright (c) 2013 Mariusz Zaborski <oshogbo@FreeBSD.org>
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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. 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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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1983, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)rwho.c 8.1 (Berkeley) 6/6/93";
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#endif
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#endif /* not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/capsicum.h>
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#include <sys/param.h>
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#include <sys/file.h>
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#include <protocols/rwhod.h>
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#include <dirent.h>
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#include <err.h>
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#include <errno.h>
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#include <langinfo.h>
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#include <locale.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <timeconv.h>
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#include <unistd.h>
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#define NUSERS 1000
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#define WHDRSIZE (ssize_t)(sizeof(wd) - sizeof(wd.wd_we))
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/*
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* this macro should be shared with ruptime.
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*/
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#define down(w,now) ((now) - (w)->wd_recvtime > 11 * 60)
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static DIR *dirp;
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static struct whod wd;
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static int nusers;
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static struct myutmp {
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char myhost[sizeof(wd.wd_hostname)];
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int myidle;
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struct outmp myutmp;
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} myutmp[NUSERS];
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static time_t now;
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static int aflg;
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static void usage(void);
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static int utmpcmp(const void *, const void *);
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int
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main(int argc, char *argv[])
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{
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int ch;
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struct dirent *dp;
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int width;
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ssize_t cc;
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struct whod *w;
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struct whoent *we;
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struct myutmp *mp;
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cap_rights_t rights;
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int f, n, i;
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int d_first;
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int dfd;
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time_t ct;
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w = &wd;
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(void) setlocale(LC_TIME, "");
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d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
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while ((ch = getopt(argc, argv, "a")) != -1) {
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switch ((char)ch) {
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case 'a':
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aflg = 1;
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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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argc -= optind;
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argv += optind;
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if (argc != 0)
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usage();
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if (chdir(_PATH_RWHODIR) < 0)
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err(1, "chdir(%s)", _PATH_RWHODIR);
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if ((dirp = opendir(".")) == NULL)
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err(1, "opendir(%s)", _PATH_RWHODIR);
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dfd = dirfd(dirp);
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mp = myutmp;
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cap_rights_init(&rights, CAP_READ, CAP_LOOKUP);
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if (cap_rights_limit(dfd, &rights) < 0 && errno != ENOSYS)
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err(1, "cap_rights_limit failed: %s", _PATH_RWHODIR);
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/*
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* Cache files required for time(3) and localtime(3) before entering
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* capability mode.
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*/
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(void) time(&ct);
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(void) localtime(&ct);
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if (cap_enter() < 0 && errno != ENOSYS)
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err(1, "cap_enter");
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(void) time(&now);
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cap_rights_init(&rights, CAP_READ);
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while ((dp = readdir(dirp)) != NULL) {
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if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5) != 0)
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continue;
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f = openat(dfd, dp->d_name, O_RDONLY);
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if (f < 0)
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continue;
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if (cap_rights_limit(f, &rights) < 0 && errno != ENOSYS)
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err(1, "cap_rights_limit failed: %s", dp->d_name);
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cc = read(f, (char *)&wd, sizeof(struct whod));
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if (cc < WHDRSIZE) {
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(void) close(f);
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continue;
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}
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if (down(w, now) != 0) {
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(void) close(f);
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continue;
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}
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cc -= WHDRSIZE;
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we = w->wd_we;
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for (n = cc / sizeof(struct whoent); n > 0; n--) {
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if (aflg == 0 && we->we_idle >= 60 * 60) {
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we++;
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continue;
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}
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if (nusers >= NUSERS)
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errx(1, "too many users");
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mp->myutmp = we->we_utmp;
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mp->myidle = we->we_idle;
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(void) strcpy(mp->myhost, w->wd_hostname);
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nusers++;
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we++;
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mp++;
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}
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(void) close(f);
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}
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qsort((char *)myutmp, nusers, sizeof(struct myutmp), utmpcmp);
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mp = myutmp;
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width = 0;
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for (i = 0; i < nusers; i++) {
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/* append one for the blank and use 8 for the out_line */
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int j;
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j = strlen(mp->myhost) + 1 + sizeof(mp->myutmp.out_line);
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if (j > width)
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width = j;
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mp++;
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}
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mp = myutmp;
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for (i = 0; i < nusers; i++) {
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char buf[BUFSIZ], cbuf[80];
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time_t t;
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t = _int_to_time(mp->myutmp.out_time);
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strftime(cbuf, sizeof(cbuf), d_first ? "%e %b %R" : "%b %e %R",
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localtime(&t));
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(void) sprintf(buf, "%s:%-.*s", mp->myhost,
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(int)sizeof(mp->myutmp.out_line), mp->myutmp.out_line);
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printf("%-*.*s %-*s %s",
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(int)sizeof(mp->myutmp.out_name),
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(int)sizeof(mp->myutmp.out_name),
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mp->myutmp.out_name, width, buf, cbuf);
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mp->myidle /= 60;
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if (mp->myidle != 0) {
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if (aflg != 0) {
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if (mp->myidle >= 100 * 60)
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mp->myidle = 100 * 60 - 1;
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if (mp->myidle >= 60)
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printf(" %2d", mp->myidle / 60);
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else
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printf(" ");
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} else {
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printf(" ");
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}
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printf(":%02d", mp->myidle % 60);
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}
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printf("\n");
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mp++;
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}
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exit(0);
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}
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static void
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usage(void)
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{
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fprintf(stderr, "usage: rwho [-a]\n");
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exit(1);
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}
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#define MYUTMP(a) ((const struct myutmp *)(a))
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static int
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utmpcmp(const void *u1, const void *u2)
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{
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int rc;
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rc = strncmp(MYUTMP(u1)->myutmp.out_name, MYUTMP(u2)->myutmp.out_name,
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sizeof(MYUTMP(u2)->myutmp.out_name));
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if (rc != 0)
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return (rc);
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rc = strcmp(MYUTMP(u1)->myhost, MYUTMP(u2)->myhost);
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if (rc != 0)
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return (rc);
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return (strncmp(MYUTMP(u1)->myutmp.out_line,
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MYUTMP(u2)->myutmp.out_line, sizeof(MYUTMP(u2)->myutmp.out_line)));
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}
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