/* Great hacking proggie by the eleet p0nk B) */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <pwd.h>
#include <unistd.h>
#include <paths.h>
 
#include <rpc/rpc.h>
#include <rpcsvc/rwall.h>
 
#define FLASH "\033c\033(0\033#8\033[1;3r\033[J\033[5m\033[?5h"
 
 
struct timeval timeout = { 25, 0 };
int mbufsize;
char *mbuf;
 
void makemsg ();
 
int
main(argc, argv)
        int argc;
        char **argv;
{
        char *wallhost, res;
        CLIENT *cl;
        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);
        }
 
        if (clnt_call(cl, WALLPROC_WALL, xdr_wrapstring, &mbuf, xdr_void, &res, timeout) != RPC_SUCCESS) {
                /*
                 * An error occurred while calling the server. 
                 * Print error message and die.
                 */
                clnt_perror(cl, wallhost);
                exit(1);
        }
 
        exit(0);
}
 
void
makemsg(fname)
        char *fname;
{
        struct tm *lt;
        struct passwd *pw;
        struct stat sbuf;
        time_t now;
        FILE *fp;
        int fd;
        char whom[30]=FLASH, hostname[MAXHOSTNAMELEN], lbuf[100], tmpname[32];
 
        (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);
 
                (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);
}