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Diffstat (limited to 'usr.bin/rwall/rwall.c')
-rw-r--r-- | usr.bin/rwall/rwall.c | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/usr.bin/rwall/rwall.c b/usr.bin/rwall/rwall.c new file mode 100644 index 0000000..fe0983a --- /dev/null +++ b/usr.bin/rwall/rwall.c @@ -0,0 +1,177 @@ +/* + * Copyright (c) 1993 Christopher G. Demetriou + * Copyright (c) 1988, 1990 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. 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. + */ + +#ifndef lint +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[] = "$Id$"; +#endif /* not lint */ + +/* + * This program is not related to David Wall, whose Stanford Ph.D. thesis + * is entitled "Mechanisms for Broadcast and Selective Broadcast". + */ + +#include <sys/param.h> +#include <sys/stat.h> +#include <sys/time.h> +#include <sys/uio.h> +#include <utmp.h> +#include <pwd.h> +#include <stdio.h> +#include <stdlib.h> +#include <paths.h> + +#include <rpc/rpc.h> +#include <rpcsvc/rwall.h> + +int mbufsize; +char *mbuf; + +/* ARGSUSED */ +main(argc, argv) + int argc; + char **argv; +{ + char *wallhost, res; + CLIENT *cl; + struct timeval tv; + + if ((argc < 2) || (argc > 3)) { + fprintf(stderr, "usage: %s hostname [file]\n", argv[0]); + exit(1); + } + + wallhost = argv[1]; + + makemsg(argv[2]); + + /* + * Create client "handle" used for calling MESSAGEPROG on the + * server designated on the command line. We tell the rpc package + * to use the "tcp" protocol when contacting the server. + */ + cl = clnt_create(wallhost, WALLPROG, WALLVERS, "udp"); + if (cl == NULL) { + /* + * Couldn't establish connection with server. + * Print error message and die. + */ + clnt_pcreateerror(wallhost); + exit(1); + } + + tv.tv_sec = 15; /* XXX ?? */ + tv.tv_usec = 0; + if (clnt_call(cl, WALLPROC_WALL, xdr_wrapstring, &mbuf, xdr_void, &res, tv) != RPC_SUCCESS) { + /* + * An error occurred while calling the server. + * Print error message and die. + */ + clnt_perror(cl, wallhost); + exit(1); + } + + exit(0); +} + +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(); + + (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)unlink(tmpname); + + if (!(whom = getlogin())) + whom = (pw = getpwuid(getuid())) ? pw->pw_name : "???"; + (void)gethostname(hostname, sizeof(hostname)); + (void)time(&now); + lt = localtime(&now); + + /* + * 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, "Remote Broadcast Message from %s@%s\n", + whom, hostname); + (void)fprintf(fp, " (%s) at %d:%02d ...\n", ttyname(2), + lt->tm_hour, lt->tm_min); + + putc('\n', fp); + + if (fname && !(freopen(fname, "r", stdin))) { + (void)fprintf(stderr, "wall: can't read %s.\n", fname); + exit(1); + } + 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); + } + 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); + } + (void)close(fd); +} |