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-rw-r--r--contrib/tcsh/tc.who.c703
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diff --git a/contrib/tcsh/tc.who.c b/contrib/tcsh/tc.who.c
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-/* $Header: /p/tcsh/cvsroot/tcsh/tc.who.c,v 3.51 2006/03/03 22:08:45 amold Exp $ */
-/*
- * tc.who.c: Watch logins and logouts...
- */
-/*-
- * Copyright (c) 1980, 1991 The Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-#include "sh.h"
-
-RCSID("$tcsh: tc.who.c,v 3.51 2006/03/03 22:08:45 amold Exp $")
-
-#include "tc.h"
-
-#ifndef HAVENOUTMP
-/*
- * kfk 26 Jan 1984 - for login watch functions.
- */
-#include <ctype.h>
-
-#ifdef HAVE_UTMPX_H
-# include <utmpx.h>
-/* I just redefine a few words here. Changing every occurrence below
- * seems like too much of work. All UTMP functions have equivalent
- * UTMPX counterparts, so they can be added all here when needed.
- * Kimmo Suominen, Oct 14 1991
- */
-# if defined(__UTMPX_FILE) && !defined(UTMPX_FILE)
-# define TCSH_PATH_UTMP __UTMPX_FILE
-# elif defined(_PATH_UTMPX)
-# define TCSH_PATH_UTMP _PATH_UTMPX
-# elif defined(UTMPX_FILE)
-# define TCSH_PATH_UTMP UTMPX_FILE
-# endif /* __UTMPX_FILE && !UTMPX_FILE */
-# ifdef TCSH_PATH_UTMP
-# define utmp utmpx
-# if defined(HAVE_STRUCT_UTMP_UT_TV)
-# define ut_time ut_tv.tv_sec
-# elif defined(HAVE_STRUCT_UTMP_UT_XTIME)
-# define ut_time ut_xtime
-# endif
-# ifdef HAVE_STRUCT_UTMP_UT_USER
-# define ut_name ut_user
-# endif
-# ifdef HAVE_GETUTENT
-# define getutent getutxent
-# define setutent setutxent
-# define endutent endutxent
-# endif /* HAVE_GETUTENT */
-# else
-# ifdef HAVE_UTMP_H
-# include <utmp.h>
-# endif /* WINNT_NATIVE */
-# endif /* TCSH_PATH_UTMP */
-#else /* !HAVE_UTMPX_H */
-# ifdef HAVE_UTMP_H
-# include <utmp.h>
-# endif /* WINNT_NATIVE */
-#endif /* HAVE_UTMPX_H */
-
-#ifndef BROKEN_CC
-# define UTNAMLEN sizeof(((struct utmp *) 0)->ut_name)
-# define UTLINLEN sizeof(((struct utmp *) 0)->ut_line)
-# ifdef HAVE_STRUCT_UTMP_UT_HOST
-# ifdef _SEQUENT_
-# define UTHOSTLEN 100
-# else
-# define UTHOSTLEN sizeof(((struct utmp *) 0)->ut_host)
-# endif
-# endif /* HAVE_STRUCT_UTMP_UT_HOST */
-#else
-/* give poor cc a little help if it needs it */
-struct utmp __ut;
-
-# define UTNAMLEN sizeof(__ut.ut_name)
-# define UTLINLEN sizeof(__ut.ut_line)
-# ifdef HAVE_STRUCT_UTMP_UT_HOST
-# ifdef _SEQUENT_
-# define UTHOSTLEN 100
-# else
-# define UTHOSTLEN sizeof(__ut.ut_host)
-# endif
-# endif /* HAVE_STRUCT_UTMP_UT_HOST */
-#endif /* BROKEN_CC */
-
-#ifndef TCSH_PATH_UTMP
-# ifdef UTMP_FILE
-# define TCSH_PATH_UTMP UTMP_FILE
-# elif defined(_PATH_UTMP)
-# define TCSH_PATH_UTMP _PATH_UTMP
-# else
-# define TCSH_PATH_UTMP "/etc/utmp"
-# endif /* UTMP_FILE */
-#endif /* TCSH_PATH_UTMP */
-
-
-struct who {
- struct who *who_next;
- struct who *who_prev;
- char who_name[UTNAMLEN + 1];
- char who_new[UTNAMLEN + 1];
- char who_tty[UTLINLEN + 1];
-#ifdef HAVE_STRUCT_UTMP_UT_HOST
- char who_host[UTHOSTLEN + 1];
-#endif /* HAVE_STRUCT_UTMP_UT_HOST */
- time_t who_time;
- int who_status;
-};
-
-static struct who whohead, whotail;
-static time_t watch_period = 0;
-static time_t stlast = 0;
-#ifdef WHODEBUG
-static void debugwholist (struct who *, struct who *);
-#endif
-static void print_who (struct who *);
-
-
-#define ONLINE 01
-#define OFFLINE 02
-#define CHANGED 04
-#define STMASK 07
-#define ANNOUNCE 010
-#define CLEARED 020
-
-/*
- * Karl Kleinpaste, 26 Jan 1984.
- * Initialize the dummy tty list for login watch.
- * This dummy list eliminates boundary conditions
- * when doing pointer-chase searches.
- */
-void
-initwatch(void)
-{
- whohead.who_next = &whotail;
- whotail.who_prev = &whohead;
- stlast = 1;
-#ifdef WHODEBUG
- debugwholist(NULL, NULL);
-#endif /* WHODEBUG */
-}
-
-void
-resetwatch(void)
-{
- watch_period = 0;
- stlast = 0;
-}
-
-/*
- * Karl Kleinpaste, 26 Jan 1984.
- * Watch /etc/utmp for login/logout changes.
- */
-void
-watch_login(int force)
-{
- int comp = -1, alldone;
- int firsttime = stlast == 1;
-#ifdef HAVE_GETUTENT
- struct utmp *uptr;
-#else
- int utmpfd;
-#endif
- struct utmp utmp;
- struct who *wp, *wpnew;
- struct varent *v;
- Char **vp = NULL;
- time_t t, interval = MAILINTVL;
- struct stat sta;
-#if defined(HAVE_STRUCT_UTMP_UT_HOST) && defined(_SEQUENT_)
- char *host, *ut_find_host();
-#endif
-#ifdef WINNT_NATIVE
- static int ncbs_posted = 0;
- USE(utmp);
- USE(utmpfd);
- USE(sta);
- USE(wpnew);
-#endif /* WINNT_NATIVE */
-
- /* stop SIGINT, lest our login list get trashed. */
- pintr_disabled++;
- cleanup_push(&pintr_disabled, disabled_cleanup);
-
- v = adrof(STRwatch);
- if ((v == NULL || v->vec == NULL) && !force) {
- cleanup_until(&pintr_disabled);
- return; /* no names to watch */
- }
- if (!force) {
- trim(vp = v->vec);
- if (blklen(vp) % 2) /* odd # args: 1st == # minutes. */
- interval = (number(*vp)) ? (getn(*vp++) * 60) : MAILINTVL;
- }
- else
- interval = 0;
-
- (void) time(&t);
-#ifdef WINNT_NATIVE
- /*
- * Since NCB_ASTATs take time, start em async at least 90 secs
- * before we are due -amol 6/5/97
- */
- if (!ncbs_posted) {
- time_t tdiff = t - watch_period;
- if (!watch_period || ((tdiff > 0) && (tdiff > (interval - 90)))) {
- start_ncbs(vp);
- ncbs_posted = 1;
- }
- }
-#endif /* WINNT_NATIVE */
- if (t - watch_period < interval) {
- cleanup_until(&pintr_disabled);
- return; /* not long enough yet... */
- }
- watch_period = t;
-#ifdef WINNT_NATIVE
- ncbs_posted = 0;
-#else /* !WINNT_NATIVE */
-
- /*
- * From: Michael Schroeder <mlschroe@immd4.informatik.uni-erlangen.de>
- * Don't open utmp all the time, stat it first...
- */
- if (stat(TCSH_PATH_UTMP, &sta)) {
- if (!force)
- xprintf(CGETS(26, 1,
- "cannot stat %s. Please \"unset watch\".\n"),
- TCSH_PATH_UTMP);
- cleanup_until(&pintr_disabled);
- return;
- }
- if (stlast == sta.st_mtime) {
- cleanup_until(&pintr_disabled);
- return;
- }
- stlast = sta.st_mtime;
-#ifdef HAVE_GETUTENT
- setutent();
-#else
- if ((utmpfd = xopen(TCSH_PATH_UTMP, O_RDONLY|O_LARGEFILE)) < 0) {
- if (!force)
- xprintf(CGETS(26, 2,
- "%s cannot be opened. Please \"unset watch\".\n"),
- TCSH_PATH_UTMP);
- cleanup_until(&pintr_disabled);
- return;
- }
- cleanup_push(&utmpfd, open_cleanup);
-#endif
-
- /*
- * xterm clears the entire utmp entry - mark everyone on the status list
- * OFFLINE or we won't notice X "logouts"
- */
- for (wp = whohead.who_next; wp->who_next != NULL; wp = wp->who_next)
- wp->who_status = OFFLINE | CLEARED;
-
- /*
- * Read in the utmp file, sort the entries, and update existing entries or
- * add new entries to the status list.
- */
-#ifdef HAVE_GETUTENT
- while ((uptr = getutent()) != NULL) {
- memcpy(&utmp, uptr, sizeof (utmp));
-#else
- while (xread(utmpfd, &utmp, sizeof utmp) == sizeof utmp) {
-#endif
-
-# ifdef DEAD_PROCESS
-# ifndef IRIS4D
- if (utmp.ut_type != USER_PROCESS)
- continue;
-# else
- /* Why is that? Cause the utmp file is always corrupted??? */
- if (utmp.ut_type != USER_PROCESS && utmp.ut_type != DEAD_PROCESS)
- continue;
-# endif /* IRIS4D */
-# endif /* DEAD_PROCESS */
-
- if (utmp.ut_name[0] == '\0' && utmp.ut_line[0] == '\0')
- continue; /* completely void entry */
-# ifdef DEAD_PROCESS
- if (utmp.ut_type == DEAD_PROCESS && utmp.ut_line[0] == '\0')
- continue;
-# endif /* DEAD_PROCESS */
- wp = whohead.who_next;
- while (wp->who_next && (comp = strncmp(wp->who_tty, utmp.ut_line, UTLINLEN)) < 0)
- wp = wp->who_next;/* find that tty! */
-
- if (wp->who_next && comp == 0) { /* found the tty... */
- if (utmp.ut_time < wp->who_time)
- continue;
-# ifdef DEAD_PROCESS
- if (utmp.ut_type == DEAD_PROCESS) {
- wp->who_time = utmp.ut_time;
- wp->who_status = OFFLINE;
- }
- else
-# endif /* DEAD_PROCESS */
- if (utmp.ut_name[0] == '\0') {
- wp->who_time = utmp.ut_time;
- wp->who_status = OFFLINE;
- }
- else if (strncmp(utmp.ut_name, wp->who_name, UTNAMLEN) == 0) {
- /* someone is logged in */
- wp->who_time = utmp.ut_time;
- wp->who_status = ONLINE | ANNOUNCE; /* same guy */
- }
- else {
- (void) strncpy(wp->who_new, utmp.ut_name, UTNAMLEN);
-# ifdef HAVE_STRUCT_UTMP_UT_HOST
-# ifdef _SEQUENT_
- host = ut_find_host(wp->who_tty);
- if (host)
- (void) strncpy(wp->who_host, host, UTHOSTLEN);
- else
- wp->who_host[0] = 0;
-# else
- (void) strncpy(wp->who_host, utmp.ut_host, UTHOSTLEN);
-# endif
-# endif /* HAVE_STRUCT_UTMP_UT_HOST */
- wp->who_time = utmp.ut_time;
- if (wp->who_name[0] == '\0')
- wp->who_status = ONLINE;
- else
- wp->who_status = CHANGED;
- }
- }
- else { /* new tty in utmp */
- wpnew = xcalloc(1, sizeof *wpnew);
- (void) strncpy(wpnew->who_tty, utmp.ut_line, UTLINLEN);
-# ifdef HAVE_STRUCT_UTMP_UT_HOST
-# ifdef _SEQUENT_
- host = ut_find_host(wpnew->who_tty);
- if (host)
- (void) strncpy(wpnew->who_host, host, UTHOSTLEN);
- else
- wpnew->who_host[0] = 0;
-# else
- (void) strncpy(wpnew->who_host, utmp.ut_host, UTHOSTLEN);
-# endif
-# endif /* HAVE_STRUCT_UTMP_UT_HOST */
- wpnew->who_time = utmp.ut_time;
-# ifdef DEAD_PROCESS
- if (utmp.ut_type == DEAD_PROCESS)
- wpnew->who_status = OFFLINE;
- else
-# endif /* DEAD_PROCESS */
- if (utmp.ut_name[0] == '\0')
- wpnew->who_status = OFFLINE;
- else {
- (void) strncpy(wpnew->who_new, utmp.ut_name, UTNAMLEN);
- wpnew->who_status = ONLINE;
- }
-# ifdef WHODEBUG
- debugwholist(wpnew, wp);
-# endif /* WHODEBUG */
-
- wpnew->who_next = wp; /* link in a new 'who' */
- wpnew->who_prev = wp->who_prev;
- wpnew->who_prev->who_next = wpnew;
- wp->who_prev = wpnew; /* linked in now */
- }
- }
-#ifdef HAVE_GETUTENT
- endutent();
-#else
- cleanup_until(&utmpfd);
-#endif
-# if defined(HAVE_STRUCT_UTMP_UT_HOST) && defined(_SEQUENT_)
- endutent();
-# endif
-#endif /* !WINNT_NATIVE */
-
- if (force || vp == NULL) {
- cleanup_until(&pintr_disabled);
- return;
- }
-
- /*
- * The state of all logins is now known, so we can search the user's list
- * of watchables to print the interesting ones.
- */
- for (alldone = 0; !alldone && *vp != NULL && **vp != '\0' &&
- *(vp + 1) != NULL && **(vp + 1) != '\0';
- vp += 2) { /* args used in pairs... */
-
- if (eq(*vp, STRany) && eq(*(vp + 1), STRany))
- alldone = 1;
-
- for (wp = whohead.who_next; wp->who_next != NULL; wp = wp->who_next) {
- if (wp->who_status & ANNOUNCE ||
- (!eq(STRany, vp[0]) &&
- !Gmatch(str2short(wp->who_name), vp[0]) &&
- !Gmatch(str2short(wp->who_new), vp[0])) ||
- (!Gmatch(str2short(wp->who_tty), vp[1]) &&
- !eq(STRany, vp[1])))
- continue; /* entry doesn't qualify */
- /* already printed or not right one to print */
-
-
- if (wp->who_status & CLEARED) {/* utmp entry was cleared */
- wp->who_time = watch_period;
- wp->who_status &= ~CLEARED;
- }
-
- if ((wp->who_status & OFFLINE) &&
- (wp->who_name[0] != '\0')) {
- if (!firsttime)
- print_who(wp);
- wp->who_name[0] = '\0';
- wp->who_status |= ANNOUNCE;
- continue;
- }
- if (wp->who_status & ONLINE) {
- if (!firsttime)
- print_who(wp);
- (void) strcpy(wp->who_name, wp->who_new);
- wp->who_status |= ANNOUNCE;
- continue;
- }
- if (wp->who_status & CHANGED) {
- if (!firsttime)
- print_who(wp);
- (void) strcpy(wp->who_name, wp->who_new);
- wp->who_status |= ANNOUNCE;
- continue;
- }
- }
- }
- cleanup_until(&pintr_disabled);
-}
-
-#ifdef WHODEBUG
-static void
-debugwholist(struct who *new, struct who *wp)
-{
- struct who *a;
-
- a = whohead.who_next;
- while (a->who_next != NULL) {
- xprintf("%s/%s -> ", a->who_name, a->who_tty);
- a = a->who_next;
- }
- xprintf("TAIL\n");
- if (a != &whotail) {
- xprintf(CGETS(26, 3, "BUG! last element is not whotail!\n"));
- abort();
- }
- a = whotail.who_prev;
- xprintf(CGETS(26, 4, "backward: "));
- while (a->who_prev != NULL) {
- xprintf("%s/%s -> ", a->who_name, a->who_tty);
- a = a->who_prev;
- }
- xprintf("HEAD\n");
- if (a != &whohead) {
- xprintf(CGETS(26, 5, "BUG! first element is not whohead!\n"));
- abort();
- }
- if (new)
- xprintf(CGETS(26, 6, "new: %s/%s\n"), new->who_name, new->who_tty);
- if (wp)
- xprintf("wp: %s/%s\n", wp->who_name, wp->who_tty);
-}
-#endif /* WHODEBUG */
-
-
-static void
-print_who(struct who *wp)
-{
-#ifdef HAVE_STRUCT_UTMP_UT_HOST
- Char *cp = str2short(CGETS(26, 7, "%n has %a %l from %m."));
-#else
- Char *cp = str2short(CGETS(26, 8, "%n has %a %l."));
-#endif /* HAVE_STRUCT_UTMP_UT_HOST */
- struct varent *vp = adrof(STRwho);
- Char *str;
-
- if (vp && vp->vec && vp->vec[0])
- cp = vp->vec[0];
-
- str = tprintf(FMT_WHO, cp, NULL, wp->who_time, wp);
- cleanup_push(str, xfree);
- for (cp = str; *cp;)
- xputwchar(*cp++);
- cleanup_until(str);
- xputchar('\n');
-} /* end print_who */
-
-
-char *
-who_info(ptr_t ptr, int c)
-{
- struct who *wp = ptr;
- char *wbuf;
-#ifdef HAVE_STRUCT_UTMP_UT_HOST
- char *wb;
- int flg;
- char *pb;
-#endif /* HAVE_STRUCT_UTMP_UT_HOST */
-
- switch (c) {
- case 'n': /* user name */
- switch (wp->who_status & STMASK) {
- case ONLINE:
- case CHANGED:
- return strsave(wp->who_new);
- case OFFLINE:
- return strsave(wp->who_name);
- default:
- break;
- }
- break;
-
- case 'a':
- switch (wp->who_status & STMASK) {
- case ONLINE:
- return strsave(CGETS(26, 9, "logged on"));
- case OFFLINE:
- return strsave(CGETS(26, 10, "logged off"));
- case CHANGED:
- return xasprintf(CGETS(26, 11, "replaced %s on"), wp->who_name);
- default:
- break;
- }
- break;
-
-#ifdef HAVE_STRUCT_UTMP_UT_HOST
- case 'm':
- if (wp->who_host[0] == '\0')
- return strsave(CGETS(26, 12, "local"));
- else {
- pb = wp->who_host;
- wbuf = xmalloc(strlen(pb) + 1);
- wb = wbuf;
- /* the ':' stuff is for <host>:<display>.<screen> */
- for (flg = isdigit((unsigned char)*pb) ? '\0' : '.';
- *pb != '\0' && (*pb != flg || ((pb = strchr(pb, ':')) != 0));
- pb++) {
- if (*pb == ':')
- flg = '\0';
- *wb++ = isupper((unsigned char)*pb) ?
- tolower((unsigned char)*pb) : *pb;
- }
- *wb = '\0';
- return wbuf;
- }
-
- case 'M':
- if (wp->who_host[0] == '\0')
- return strsave(CGETS(26, 12, "local"));
- else {
- pb = wp->who_host;
- wbuf = xmalloc(strlen(pb) + 1);
- wb = wbuf;
- for (; *pb != '\0'; pb++)
- *wb++ = isupper((unsigned char)*pb) ?
- tolower((unsigned char)*pb) : *pb;
- *wb = '\0';
- return wbuf;
- }
-#endif /* HAVE_STRUCT_UTMP_UT_HOST */
-
- case 'l':
- return strsave(wp->who_tty);
-
- default:
- wbuf = xmalloc(3);
- wbuf[0] = '%';
- wbuf[1] = (char) c;
- wbuf[2] = '\0';
- return wbuf;
- }
- return NULL;
-}
-
-void
-/*ARGSUSED*/
-dolog(Char **v, struct command *c)
-{
- struct who *wp;
- struct varent *vp;
-
- USE(v);
- USE(c);
- vp = adrof(STRwatch); /* lint insists vp isn't used unless we */
- if (vp == NULL) /* unless we assign it outside the if */
- stderror(ERR_NOWATCH);
- resetwatch();
- wp = whohead.who_next;
- while (wp->who_next != NULL) {
- wp->who_name[0] = '\0';
- wp = wp->who_next;
- }
-}
-
-# ifdef HAVE_STRUCT_UTMP_UT_HOST
-size_t
-utmphostsize(void)
-{
- return UTHOSTLEN;
-}
-
-char *
-utmphost(void)
-{
- char *tty = short2str(varval(STRtty));
- struct who *wp;
- char *host = NULL;
-
- watch_login(1);
-
- for (wp = whohead.who_next; wp->who_next != NULL; wp = wp->who_next) {
- if (strcmp(tty, wp->who_tty) == 0)
- host = wp->who_host;
- wp->who_name[0] = '\0';
- }
- resetwatch();
- return host;
-}
-# endif /* HAVE_STRUCT_UTMP_UT_HOST */
-
-#ifdef WINNT_NATIVE
-void add_to_who_list(name, mach_nm)
- char *name;
- char *mach_nm;
-{
-
- struct who *wp, *wpnew;
- int comp = -1;
-
- wp = whohead.who_next;
- while (wp->who_next && (comp = strncmp(wp->who_tty,mach_nm,UTLINLEN)) < 0)
- wp = wp->who_next;/* find that tty! */
-
- if (wp->who_next && comp == 0) { /* found the tty... */
-
- if (*name == '\0') {
- wp->who_time = 0;
- wp->who_status = OFFLINE;
- }
- else if (strncmp(name, wp->who_name, UTNAMLEN) == 0) {
- /* someone is logged in */
- wp->who_time = 0;
- wp->who_status = 0; /* same guy */
- }
- else {
- (void) strncpy(wp->who_new, name, UTNAMLEN);
- wp->who_time = 0;
- if (wp->who_name[0] == '\0')
- wp->who_status = ONLINE;
- else
- wp->who_status = CHANGED;
- }
- }
- else {
- wpnew = xcalloc(1, sizeof *wpnew);
- (void) strncpy(wpnew->who_tty, mach_nm, UTLINLEN);
- wpnew->who_time = 0;
- if (*name == '\0')
- wpnew->who_status = OFFLINE;
- else {
- (void) strncpy(wpnew->who_new, name, UTNAMLEN);
- wpnew->who_status = ONLINE;
- }
-#ifdef WHODEBUG
- debugwholist(wpnew, wp);
-#endif /* WHODEBUG */
-
- wpnew->who_next = wp; /* link in a new 'who' */
- wpnew->who_prev = wp->who_prev;
- wpnew->who_prev->who_next = wpnew;
- wp->who_prev = wpnew; /* linked in now */
- }
-}
-#endif /* WINNT_NATIVE */
-#endif /* HAVENOUTMP */
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