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Forgot to include utmpx support for this one.

This commit is contained in:
christos 2004-06-25 17:34:38 +00:00
parent 8f329619b8
commit fd55c85046
3 changed files with 114 additions and 88 deletions
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9
libexec/comsat/Makefile
View File

@ -1,7 +1,14 @@
# $NetBSD: Makefile,v 1.5 1997/10/07 10:57:08 mrg Exp $
# $NetBSD: Makefile,v 1.6 2004/06/25 17:34:38 christos Exp $
# from: @(#)Makefile 8.1 (Berkeley) 6/4/93
.include <bsd.own.mk>
WARNS?=3
PROG= comsat
SRCS= comsat.c utmpentry.c
MAN= comsat.8
.PATH.c: ${NETBSDSRCDIR}/usr.bin/who
CPPFLAGS+=-I${NETBSDSRCDIR}/usr.bin/who -DSUPPORT_UTMPX -DSUPPORT_UTMP
.include <bsd.prog.mk>

12
libexec/comsat/comsat.8
View File

@ -1,4 +1,4 @@
.\" $NetBSD: comsat.8,v 1.11 2003/08/07 09:46:37 agc Exp $
.\" $NetBSD: comsat.8,v 1.12 2004/06/25 17:34:38 christos Exp $
.\"
.\" Copyright (c) 1983, 1991, 1993
.\" The Regents of the University of California. All rights reserved.
@ -29,7 +29,7 @@
.\"
.\" from: @(#)comsat.8 8.1 (Berkeley) 6/4/93
.\"
.Dd June 4, 1993
.Dd June 25, 1994
.Dt COMSAT 8
.Os
.Sh NAME
@ -84,9 +84,13 @@ option turns on
log messages.
.El
.Sh FILES
.Bl -tag -width /var/run/utmp -compact
To find out who's logged on and on what terminals
.Nm
consults:
.Pp
.Bl -tag -width /var/run/utmpx -compact
.It Pa /var/run/utmp
to find out who's logged on and on what terminals
.It Pa /var/run/utmpx
.El
.Sh SEE ALSO
.Xr biff 1 ,

181
libexec/comsat/comsat.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: comsat.c,v 1.26 2003/09/19 05:33:15 itojun Exp $ */
/* $NetBSD: comsat.c,v 1.27 2004/06/25 17:34:38 christos Exp $ */
/*
* Copyright (c) 1980, 1993
@ -36,7 +36,7 @@ __COPYRIGHT("@(#) Copyright (c) 1980, 1993\n\
#if 0
static char sccsid[] = "from: @(#)comsat.c 8.1 (Berkeley) 6/4/93";
#else
__RCSID("$NetBSD: comsat.c,v 1.26 2003/09/19 05:33:15 itojun Exp $");
__RCSID("$NetBSD: comsat.c,v 1.27 2004/06/25 17:34:38 christos Exp $");
#endif
#endif /* not lint */
@ -53,6 +53,7 @@ __RCSID("$NetBSD: comsat.c,v 1.26 2003/09/19 05:33:15 itojun Exp $");
#include <netdb.h>
#include <paths.h>
#include <pwd.h>
#include <err.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
@ -62,41 +63,51 @@ __RCSID("$NetBSD: comsat.c,v 1.26 2003/09/19 05:33:15 itojun Exp $");
#include <time.h>
#include <vis.h>
#include <unistd.h>
#ifdef SUPPORT_UTMP
#include <utmp.h>
#endif
#ifdef SUPPORT_UTMPX
#include <utmpx.h>
#endif
#include "utmpentry.h"
#if !defined(SUPPORT_UTMP) && !defined(SUPPORT_UTMPX)
#error "SUPPORT_UTMP and/or SUPPORT_UTMPX must be defined"
#endif
int logging;
int debug = 0;
#define dsyslog if (debug) syslog
#define MAXIDLE 120
char hostname[MAXHOSTNAMELEN+1];
struct utmp *utmp = NULL;
time_t lastmsgtime;
int nutmp, uf;
static int logging;
static int debug = 0;
static char hostname[MAXHOSTNAMELEN+1];
static time_t utmpmtime; /* last modification time for utmp/x */
static int nutmp;
static struct utmpentry *utmp = NULL;
static time_t lastmsgtime;
void jkfprintf (FILE *, char[], off_t);
void mailfor (char *);
void notify (struct utmp *, off_t);
void onalrm (int);
void reapchildren (int);
int main(int, char *[]);
static void jkfprintf(FILE *, const char *, off_t, const char *);
static void mailfor(const char *);
static void notify(const struct utmpentry *, off_t);
static void onalrm(int);
static void reapchildren(int);
int
main(int argc, char *argv[])
{
struct sockaddr_storage from;
int cc, ch;
int fromlen;
socklen_t fromlen;
char msgbuf[100];
sigset_t nsigset;
sigset_t nsigset, osigset;
/* verify proper invocation */
fromlen = sizeof(from);
if (getsockname(0, (struct sockaddr *)&from, &fromlen) < 0) {
(void)fprintf(stderr,
"comsat: getsockname: %s.\n", strerror(errno));
exit(1);
}
if (getsockname(0, (struct sockaddr *)(void *)&from, &fromlen) == -1)
err(1, "getsockname (%s)", strerror(errno));
openlog("comsat", LOG_PID, LOG_DAEMON);
while ((ch = getopt(argc, argv, "l")) != -1)
@ -108,16 +119,11 @@ main(int argc, char *argv[])
syslog(LOG_ERR, "Usage: %s [-l]", getprogname());
exit(1);
}
if (chdir(_PATH_MAILDIR)) {
if (chdir(_PATH_MAILDIR) == -1) {
syslog(LOG_ERR, "chdir: %s: %m", _PATH_MAILDIR);
(void)recv(0, msgbuf, sizeof(msgbuf) - 1, 0);
exit(1);
}
if ((uf = open(_PATH_UTMP, O_RDONLY, 0)) < 0) {
syslog(LOG_ERR, "open: %s: %m", _PATH_UTMP);
(void)recv(0, msgbuf, sizeof(msgbuf) - 1, 0);
exit(1);
}
(void)time(&lastmsgtime);
(void)gethostname(hostname, sizeof(hostname));
hostname[sizeof(hostname) - 1] = '\0';
@ -125,6 +131,12 @@ main(int argc, char *argv[])
(void)signal(SIGALRM, onalrm);
(void)signal(SIGTTOU, SIG_IGN);
(void)signal(SIGCHLD, reapchildren);
(void)sigemptyset(&nsigset);
(void)sigaddset(&nsigset, SIGALRM);
if (sigprocmask(SIG_SETMASK, NULL, &osigset) == -1) {
syslog(LOG_ERR, "sigprocmask get failed (%m)");
exit(1);
}
for (;;) {
cc = recv(0, msgbuf, sizeof(msgbuf) - 1, 0);
if (cc <= 0) {
@ -135,56 +147,60 @@ main(int argc, char *argv[])
}
if (!nutmp) /* no one has logged in yet */
continue;
sigemptyset(&nsigset);
sigaddset(&nsigset, SIGALRM);
sigprocmask(SIG_SETMASK, &nsigset, NULL);
if (sigprocmask(SIG_SETMASK, &nsigset, NULL) == -1) {
syslog(LOG_ERR, "sigprocmask set failed (%m)");
exit(1);
}
msgbuf[cc] = '\0';
(void)time(&lastmsgtime);
mailfor(msgbuf);
sigemptyset(&nsigset);
sigprocmask(SIG_SETMASK, &nsigset, NULL);
if (sigprocmask(SIG_SETMASK, &osigset, NULL) == -1) {
syslog(LOG_ERR, "sigprocmask restore failed (%m)");
exit(1);
}
}
}
void
static void
/*ARGSUSED*/
reapchildren(int signo)
{
while (wait3(NULL, WNOHANG, NULL) > 0);
while (wait3(NULL, WNOHANG, NULL) != -1)
continue;
}
void
static void
/*ARGSUSED*/
onalrm(int signo)
{
static u_int utmpsize; /* last malloced size for utmp */
static u_int utmpmtime; /* last modification time for utmp */
struct stat statbf;
struct utmp *u;
time_t newtime = 0;
if (time(NULL) - lastmsgtime >= MAXIDLE)
exit(0);
(void)alarm((u_int)15);
(void)fstat(uf, &statbf);
if (statbf.st_mtime > utmpmtime) {
utmpmtime = statbf.st_mtime;
if (statbf.st_size > utmpsize) {
if ((u = realloc(utmp,
statbf.st_size + 10 * sizeof(struct utmp))) == NULL) {
syslog(LOG_ERR, "%s", strerror(errno));
exit(1);
}
utmp = u;
utmpsize = statbf.st_size + 10 * sizeof(struct utmp);
}
(void)lseek(uf, (off_t)0, SEEK_SET);
nutmp = read(uf, utmp, (int)statbf.st_size)/sizeof(struct utmp);
#ifdef SUPPORT_UTMP
if (stat(_PATH_UTMP, &statbf) != -1)
if (statbf.st_mtime > newtime)
newtime = statbf.st_mtime;
#endif
#ifdef SUPPORT_UTMPX
if (stat(_PATH_UTMP, &statbf) != -1)
if (statbf.st_mtime > newtime)
newtime = statbf.st_mtime;
#endif
if (newtime > utmpmtime) {
freeutentries(utmp);
nutmp = getutentries(NULL, &utmp);
utmpmtime = newtime;
}
}
void
mailfor(char *name)
static void
mailfor(const char *name)
{
struct utmp *utp = &utmp[nutmp];
struct utmpentry *ep;
char *cp, *fn;
off_t offset;
@ -193,7 +209,7 @@ mailfor(char *name)
*cp = '\0';
errno = 0;
offset = strtol(cp + 1, &fn, 10);
if (errno == ERANGE)
if (errno == ERANGE && (offset == LONG_MAX || offset == LONG_MIN))
return;
if (fn && *fn && *fn != '\n') {
/*
@ -203,30 +219,28 @@ mailfor(char *name)
* files, we need to ignore these. With one exception:
* if it mentions the user's system mailbox.
*/
char maildir[128];
char maildir[MAXPATHLEN];
int l = snprintf(maildir, sizeof(maildir), ":%s/%s",
_PATH_MAILDIR, name);
if (l > sizeof(maildir) || strcmp(maildir, fn) != 0)
return;
}
while (--utp >= utmp)
if (!strncmp(utp->ut_name, name, sizeof(utmp[0].ut_name)))
notify(utp, offset);
for (ep = utmp; ep != NULL; ep = ep->next)
if (strcmp(ep->name, name) == 0)
notify(ep, offset);
}
static char *cr;
void
notify(struct utmp *utp, off_t offset)
static void
notify(const struct utmpentry *ep, off_t offset)
{
FILE *tp;
struct passwd *p;
struct stat stb;
struct termios ttybuf;
char tty[20], name[sizeof(utmp[0].ut_name) + 1];
char tty[sizeof(_PATH_DEV) + sizeof(ep->line) + 1];
const char *cr;
(void)snprintf(tty, sizeof(tty), "%s%.*s",
_PATH_DEV, (int)sizeof(utp->ut_line), utp->ut_line);
(void)snprintf(tty, sizeof(tty), "%s%s", _PATH_DEV, ep->line);
if (strchr(tty + sizeof(_PATH_DEV) - 1, '/')) {
/* A slash is an attempt to break security... */
/*
@ -237,51 +251,52 @@ notify(struct utmp *utp, off_t offset)
return;
}
if (stat(tty, &stb) || !(stb.st_mode & S_IEXEC)) {
dsyslog(LOG_DEBUG, "%s: wrong mode on %s", utp->ut_name, tty);
dsyslog(LOG_DEBUG, "%s: wrong mode on %s", ep->name, tty);
return;
}
dsyslog(LOG_DEBUG, "notify %s on %s", utp->ut_name, tty);
dsyslog(LOG_DEBUG, "notify %s on %s", ep->name, tty);
if (fork())
return;
(void)signal(SIGALRM, SIG_DFL);
(void)alarm((u_int)30);
if ((tp = fopen(tty, "w")) == NULL) {
dsyslog(LOG_ERR, "%s: %s", tty, strerror(errno));
dsyslog(LOG_ERR, "open `%s' (%s)", tty, strerror(errno));
_exit(1);
}
if (tcgetattr(fileno(tp), &ttybuf) == -1) {
dsyslog(LOG_ERR, "tcgetattr `%s' (%s)", tty, strerror(errno));
_exit(1);
}
(void)tcgetattr(fileno(tp), &ttybuf);
cr = (ttybuf.c_oflag & ONLCR) && (ttybuf.c_oflag & OPOST) ?
"\n" : "\n\r";
(void)strlcpy(name, utp->ut_name, sizeof(name));
/* Set uid/gid/groups to users in case mail drop is on nfs */
if ((p = getpwnam(name)) == NULL ||
initgroups(p->pw_name, p->pw_gid) < 0 ||
setgid(p->pw_gid) < 0 ||
setuid(p->pw_uid) < 0)
if ((p = getpwnam(ep->name)) == NULL ||
initgroups(p->pw_name, p->pw_gid) == -1 ||
setgid(p->pw_gid) == -1 ||
setuid(p->pw_uid) == -1)
_exit(1);
if (logging)
syslog(LOG_INFO, "biff message for %s", name);
syslog(LOG_INFO, "biff message for %s", ep->name);
(void)fprintf(tp, "%s\007New mail for %s@%.*s\007 has arrived:%s----%s",
cr, name, (int)sizeof(hostname), hostname, cr, cr);
jkfprintf(tp, name, offset);
cr, ep->name, (int)sizeof(hostname), hostname, cr, cr);
jkfprintf(tp, ep->name, offset, cr);
(void)fclose(tp);
_exit(0);
}
void
jkfprintf(FILE *tp, char name[], off_t offset)
static void
jkfprintf(FILE *tp, const char *name, off_t offset, const char *cr)
{
FILE *fi;
int linecnt, charcnt, inheader;
char line[BUFSIZ], visline[BUFSIZ*4], *nl;
char line[BUFSIZ], visline[BUFSIZ * 4 + 1], *nl;
if ((fi = fopen(name, "r")) == NULL)
return;
(void)fseek(fi, offset, SEEK_SET);
(void)fseeko(fi, offset, SEEK_SET);
/*
* Print the first 7 lines or 560 characters of the new mail
* (whichever comes first). Skip header crap other than