* Copyright (c) 1988, 1990, 1993
* The Regents of the University of California. All rights reserved.
* %sccs.include.redist.c%
static char copyright
[] =
"@(#) Copyright (c) 1988, 1990, 1993\n\
The Regents of the University of California. All rights reserved.\n";
static char sccsid
[] = "@(#)wall.c 8.1 (Berkeley) %G%";
* This program is not related to David Wall, whose Stanford Ph.D. thesis
* is entitled "Mechanisms for Broadcast and Selective Broadcast".
#define IGNOREUSER "sleeper"
while ((ch
= getopt(argc
, argv
, "n")) != EOF
)
/* undoc option for shutdown: suppress banner */
(void)fprintf(stderr
, "usage: wall [file]\n");
if (!(fp
= fopen(_PATH_UTMP
, "r"))) {
(void)fprintf(stderr
, "wall: cannot read %s.\n", _PATH_UTMP
);
while (fread((char *)&utmp
, sizeof(utmp
), 1, fp
) == 1) {
!strncmp(utmp
.ut_name
, IGNOREUSER
, sizeof(utmp
.ut_name
)))
if (p
= ttymsg(&iov
, 1, utmp
.ut_line
, 60*5))
(void)fprintf(stderr
, "wall: %s\n", p
);
char *p
, *whom
, hostname
[MAXHOSTNAMELEN
], lbuf
[100], tmpname
[15];
char *getlogin(), *strcpy(), *ttyname();
(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");
if (!(whom
= getlogin()))
whom
= (pw
= getpwuid(getuid())) ? pw
->pw_name
: "???";
(void)gethostname(hostname
, sizeof(hostname
));
* all this stuff is to blank out a square for the message;
* we wrap message lines at column 79, not 80, because some
* terminals wrap after 79, some do not, and we can't tell.
* Which means that we may leave a non-blank character
* in column 80, but that can't be helped.
(void)fprintf(fp
, "\r%79s\r\n", " ");
(void)sprintf(lbuf
, "Broadcast Message from %s@%s",
(void)fprintf(fp
, "%-79.79s\007\007\r\n", lbuf
);
(void)sprintf(lbuf
, " (%s) at %d:%02d ...", ttyname(2),
lt
->tm_hour
, lt
->tm_min
);
(void)fprintf(fp
, "%-79.79s\r\n", lbuf
);
(void)fprintf(fp
, "%79s\r\n", " ");
if (fname
&& !(freopen(fname
, "r", stdin
))) {
(void)fprintf(stderr
, "wall: can't read %s.\n", fname
);
while (fgets(lbuf
, sizeof(lbuf
), stdin
))
for (cnt
= 0, p
= lbuf
; ch
= *p
; ++p
, ++cnt
) {
if (cnt
== 79 || ch
== '\n') {
(void)fprintf(fp
, "%79s\r\n", " ");
(void)fprintf(stderr
, "wall: can't stat temporary file.\n");
if (!(mbuf
= malloc((u_int
)mbufsize
))) {
(void)fprintf(stderr
, "wall: out of memory.\n");
if (fread(mbuf
, sizeof(*mbuf
), mbufsize
, fp
) != mbufsize
) {
(void)fprintf(stderr
, "wall: can't read temporary file.\n");