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Use err(3). Add usage().

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This commit is contained in:
charnier 1997-08-08 12:18:16 +00:00
parent 45f7e36166
commit 3fcaa37fee
2 changed files with 43 additions and 41 deletions
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8
usr.bin/rwall/rwall.1
View File

@ -30,7 +30,7 @@
.\" SUCH DAMAGE.
.\"
.\" from: @(#)rwall.1 6.7 (Berkeley) 4/23/91
.\" $Id$
.\" $Id: rwall.1,v 1.4 1997/02/22 19:56:55 peter Exp $
.\"
.Dd April 23, 1991
.Dt RWALL 1
@ -39,12 +39,12 @@
.Nm rwall
.Nd send a message to users logged on a host
.Sh SYNOPSIS
.Nm rwall
.Nm
.Ar host
.Op Ar file
.Sh DESCRIPTION
The
.Nm rwall
.Nm
command sends a message to the users logged into the specified host. The
message to be sent can be typed in and terminated with EOF or it can
be in a
@ -71,7 +71,7 @@ and cannot accomodate any RPC-based services. The host may be down.
.Xr rpc.rwalld 8
.Sh HISTORY
The
.Nm rwall
.Nm
command
appeared in
.Em Sun-OS .

76
usr.bin/rwall/rwall.c
View File

@ -33,14 +33,17 @@
*/
#ifndef lint
char copyright[] =
static const char copyright[] =
"@(#) Copyright (c) 1988 Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */
#ifndef lint
/*static char sccsid[] = "from: @(#)wall.c 5.14 (Berkeley) 3/2/91";*/
static char rcsid[] = "$Id$";
#if 0
static char sccsid[] = "from: @(#)wall.c 5.14 (Berkeley) 3/2/91";
#endif
static const char rcsid[] =
"$Id: rwall.c,v 1.5 1997/02/22 19:56:55 peter Exp $";
#endif /* not lint */
/*
@ -52,11 +55,14 @@ static char rcsid[] = "$Id$";
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/uio.h>
#include <utmp.h>
#include <err.h>
#include <paths.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <paths.h>
#include <string.h>
#include <unistd.h>
#include <utmp.h>
#include <rpc/rpc.h>
#include <rpcsvc/rwall.h>
@ -64,7 +70,11 @@ static char rcsid[] = "$Id$";
int mbufsize;
char *mbuf;
void makemsg __P((char *));
static void usage __P((void));
/* ARGSUSED */
int
main(argc, argv)
int argc;
char **argv;
@ -73,10 +83,8 @@ main(argc, argv)
CLIENT *cl;
struct timeval tv;
if ((argc < 2) || (argc > 3)) {
fprintf(stderr, "usage: %s hostname [file]\n", argv[0]);
exit(1);
}
if ((argc < 2) || (argc > 3))
usage();
wallhost = argv[1];
@ -93,8 +101,7 @@ main(argc, argv)
* Couldn't establish connection with server.
* Print error message and die.
*/
clnt_pcreateerror(wallhost);
exit(1);
errx(1, "%s", clnt_spcreateerror(wallhost));
}
tv.tv_sec = 15; /* XXX ?? */
@ -104,32 +111,35 @@ main(argc, argv)
* An error occurred while calling the server.
* Print error message and die.
*/
clnt_perror(cl, wallhost);
exit(1);
errx(1, "%s", clnt_sperror(cl, wallhost));
}
exit(0);
}
static void
usage()
{
fprintf(stderr, "usage: rwall hostname [file]\n");
exit(1);
}
void
makemsg(fname)
char *fname;
{
register int ch, cnt;
struct tm *lt;
struct passwd *pw;
struct stat sbuf;
time_t now, time();
FILE *fp;
int fd;
char *p, *whom, hostname[MAXHOSTNAMELEN], lbuf[100], tmpname[15];
char *getlogin(), *strcpy(), *ttyname();
char *whom, hostname[MAXHOSTNAMELEN], lbuf[100], tmpname[15];
(void)strcpy(tmpname, _PATH_TMP);
(void)strcat(tmpname, "/wall.XXXXXX");
if (!(fd = mkstemp(tmpname)) || !(fp = fdopen(fd, "r+"))) {
(void)fprintf(stderr, "wall: can't open temporary file.\n");
exit(1);
}
(void)strcat(tmpname, "wall.XXXXXX");
if (!(fd = mkstemp(tmpname)) || !(fp = fdopen(fd, "r+")))
errx(1, "can't open temporary file");
(void)unlink(tmpname);
if (!(whom = getlogin()))
@ -152,26 +162,18 @@ makemsg(fname)
putc('\n', fp);
if (fname && !(freopen(fname, "r", stdin))) {
(void)fprintf(stderr, "wall: can't read %s.\n", fname);
exit(1);
}
if (fname && !(freopen(fname, "r", stdin)))
errx(1, "can't read %s", fname);
while (fgets(lbuf, sizeof(lbuf), stdin))
fputs(lbuf, fp);
rewind(fp);
if (fstat(fd, &sbuf)) {
(void)fprintf(stderr, "wall: can't stat temporary file.\n");
exit(1);
}
if (fstat(fd, &sbuf))
errx(1, "can't stat temporary file");
mbufsize = sbuf.st_size;
if (!(mbuf = malloc((u_int)mbufsize))) {
(void)fprintf(stderr, "wall: out of memory.\n");
exit(1);
}
if (fread(mbuf, sizeof(*mbuf), mbufsize, fp) != mbufsize) {
(void)fprintf(stderr, "wall: can't read temporary file.\n");
exit(1);
}
if (!(mbuf = malloc((u_int)mbufsize)))
errx(1, "out of memory");
if (fread(mbuf, sizeof(*mbuf), mbufsize, fp) != mbufsize)
errx(1, "can't read temporary file");
(void)close(fd);
}