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Document -n flag. Use err(3). Add usage.

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Add syslog capability.
This commit is contained in:
Philippe Charnier 1997-12-02 12:20:17 +00:00
parent 027e5abe40
commit 40150947c4
2 changed files with 54 additions and 37 deletions
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22
libexec/rpc.rwalld/rpc.rwalld.8
View File

@ -31,7 +31,7 @@
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" $Id$
.\" $Id: rpc.rwalld.8,v 1.3 1997/02/22 14:22:18 peter Exp $
.\"
.Dd June 7, 1993
.Dt RPC.RWALLD 8
@ -41,8 +41,9 @@
.Nd write messages to users currently logged in server
.Sh SYNOPSIS
.Nm /usr/libexec/rpc.rwalld
.Op Fl n
.Sh DESCRIPTION
.Nm rpc.rwalld
.Nm Rpc.rwalld
is a server which will send a message to users
currently logged in to the system. This server
invokes the
@ -50,16 +51,27 @@ invokes the
command to actually write the messages to the
system.
.Pp
The following option is available:
.Bl -tag -width indent
.It Fl n
Do not become a daemon. This option is only available when
.Nm
is not invoked by
.Xr inetd 8 .
.El
.Pp
Messages are sent to this server by the
.Xr rwall 1
command.
The
.Nm rpc.rwalld
.Nm
daemon is normally invoked by
.Xr inetd 8 .
.Pp
.Nm rpc.rwalld
uses an RPC protocol defined in
.Nm Rpc.rwalld
uses an
.Tn RPC
protocol defined in
.Pa /usr/include/rpcsvc/rwall.x .
.Sh SEE ALSO
.Xr rwall 1 ,

69
libexec/rpc.rwalld/rwalld.c
View File

@ -28,20 +28,24 @@
*/
#ifndef lint
static char rcsid[] = "$Id$";
static const char rcsid[] =
"$Id$";
#endif /* not lint */
#include <unistd.h>
#include <sys/types.h>
#include <err.h>
#include <pwd.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <sys/socket.h>
#include <signal.h>
#include <sys/wait.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <rpc/rpc.h>
#include <rpc/pmap_clnt.h>
#include <rpcsvc/rwall.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#ifdef OSF
#define WALL_CMD "/usr/sbin/wall"
@ -52,10 +56,12 @@ static char rcsid[] = "$Id$";
void wallprog_1();
void possess();
void killkids();
static void usage __P((void));
int nodaemon = 0;
int from_inetd = 1;
int
main(argc, argv)
int argc;
char *argv[];
@ -68,10 +74,8 @@ main(argc, argv)
if (argc == 2 && !strcmp(argv[1], "-n"))
nodaemon = 1;
if (argc != 1 && !nodaemon) {
printf("usage: %s [-n]\n", argv[0]);
exit(1);
}
if (argc != 1 && !nodaemon)
usage();
if (geteuid() == 0) {
struct passwd *pep = getpwnam("nobody");
@ -96,45 +100,45 @@ main(argc, argv)
possess();
(void)pmap_unset(WALLPROG, WALLVERS);
if ((s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
perror("socket");
exit(1);
}
if ((s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
err(1, "socket");
bzero((char *)&sa, sizeof sa);
if (bind(s, (struct sockaddr *)&sa, sizeof sa) < 0) {
perror("bind");
exit(1);
}
if (bind(s, (struct sockaddr *)&sa, sizeof sa) < 0)
err(1, "bind");
salen = sizeof sa;
if (getsockname(s, (struct sockaddr *)&sa, &salen)) {
perror("getsockname");
exit(1);
}
if (getsockname(s, (struct sockaddr *)&sa, &salen))
err(1, "getsockname");
pmap_set(WALLPROG, WALLVERS, IPPROTO_UDP, ntohs(sa.sin_port));
if (dup2(s, 0) < 0) {
perror("dup2");
exit(1);
}
if (dup2(s, 0) < 0)
err(1, "dup2");
(void)pmap_unset(WALLPROG, WALLVERS);
}
(void)signal(SIGCHLD, killkids);
openlog("rpc.rwalld", LOG_CONS|LOG_PID, LOG_DAEMON);
transp = svcudp_create(sock);
if (transp == NULL) {
(void)fprintf(stderr, "cannot create udp service.\n");
syslog(LOG_ERR, "cannot create udp service");
exit(1);
}
if (!svc_register(transp, WALLPROG, WALLVERS, wallprog_1, proto)) {
(void)fprintf(stderr, "unable to register (WALLPROG, WALLVERS, udp).\n");
syslog(LOG_ERR, "unable to register (WALLPROG, WALLVERS, %s)", proto?"udp":"(inetd)");
exit(1);
}
svc_run();
(void)fprintf(stderr, "svc_run returned\n");
syslog(LOG_ERR, "svc_run returned");
exit(1);
}
static void
usage()
{
fprintf(stderr, "usage: rpc.rwalld [-n]\n");
exit(1);
}
void possess()
@ -162,6 +166,7 @@ void *wallproc_wall_1(s)
exit(0);
}
}
return(NULL);
}
void
@ -201,7 +206,7 @@ wallprog_1(rqstp, transp)
svcerr_systemerr(transp);
}
if (!svc_freeargs(transp, xdr_argument, &argument)) {
(void)fprintf(stderr, "unable to free arguments\n");
syslog(LOG_ERR, "unable to free arguments");
exit(1);
}
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