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irix-657m-src/eoe/cmd/gr_osview/remote.c
calmsacibis995 8fc8fa8089 Source code upload
2022-09-29 17:59:04 +03:00

1077 lines
21 KiB
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/**************************************************************************
* *
* Copyright (C) 1989, Silicon Graphics, Inc. *
* *
* These coded instructions, statements, and computer programs contain *
* unpublished proprietary information of Silicon Graphics, Inc., and *
* are protected by Federal copyright law. They may not be disclosed *
* to third parties or copied or duplicated in any form, in whole or *
* in part, without the prior written consent of Silicon Graphics, Inc. *
* *
**************************************************************************/
/*
* Remote access module.
*
* Remote protocol that is used.
*
* 1-> local host invokes daemon on reemote host, quits if this fails
* 2-> local host waits for version string to be sent back, and
* verifies that versions match, quits if this fails
* 3-> local host forks a RPC child to do the remote's wishes and passes
* the setup file to the remote host
* 4-> remote host parses setup file, initializes colorblocks, then
* pushes copies to local host.
* 5-> local host simply continues with colorblock calls as necessary.
*/
# include "grosview.h"
# include <sys/time.h>
# include <math.h>
# include <string.h>
# include <setjmp.h>
# include <signal.h>
# include <stdlib.h>
# include <stdio.h>
# include <errno.h>
# include <unistd.h>
# include <gl/device.h>
# define RMTCMD "/usr/sbin/gr_osview"
# define MAXRMTWAIT 30
# define RETRYWAIT 30
# define MAXHARDERROR 3
# define getcb(s) {int i; if ((i = nextint((char *) s)) < 0) \
continue; else cb = cbptr(i); }
FILE *rmtpipe;
FILE *rmtwrite;
static char copybuf[RMTBUF];
static char *pstring;
int errchan;
FILE *errfd;
int pullcbinfo(colorblock_t *);
static int fdgets(char *, int, int, FILE *, int);
static int rfgets(char *, int, int);
static int pullthecb(colorblock_t *, FILE *);
static int getremoteinfo(void);
static int contact(char *, char *, char *, char *);
static int getremote(int);
extern int rcmd(char **, u_short, char *, char *, char *, int *);
void
remote_text_start(void) {} /* beginning of text to lock down */
/*
* This is the RPC daemon.
*/
void
passdata(void)
{
if (debug)
printf("RPC daemon starting\n");
getremoteinfo();
exit(0);
}
/*
* For recovery from timeouts.
*/
jmp_buf nonsense;
void
giveup()
{
longjmp(nonsense, 1);
}
void
pushoptions(FILE *fd)
{
if (!barborder)
fprintf(fd, "=%d %d\n", S_SETOPT, SW_NOBORDER);
if (arbsize)
fprintf(fd, "=%d %d\n", S_SETOPT, SW_ARBSIZE);
if (width)
fprintf(fd, "=%d %d %d\n", S_SETOPT, SW_WIDTH,
width);
if (prefpos)
fprintf(fd, "=%d %d %d %d\n", S_SETOPT, SW_ORIGIN,
prefxpos, prefypos);
if (prefwsize)
fprintf(fd, "=%d %d %d %d\n", S_SETOPT,SW_WINSIZE,
prefxsize, prefysize);
if (fontface) {
fprintf(fd, "=%d %d\n", S_SETOPT, SW_FONT);
fprintf(fd, "%s\n", fontface);
}
if (interval)
fprintf(fd, "=%d %d %d\n", S_SETOPT, SW_INTERVAL,
interval);
fprintf(fd, "=%d %d %d\n", S_SETOPT, SW_BACKCOLOR,
backcolor);
fprintf(fd, "=%d %d %d\n", S_SETOPT, SW_FRONTCOLOR,
frontcolor);
}
void
doanoption(FILE *fd) {
int tmp1;
int tmp2;
int i;
char sbuf[RMTBUF];
if ((i = nextint((char *) 0)) < 0)
return;
switch (i) {
case SW_NOBORDER:
barborder = 0;
break;
case SW_WIDTH:
if ((tmp1 = nextint((char *) 0)) < 0)
return;
width = tmp1;
break;
case SW_ARBSIZE:
arbsize = 1;
break;
case SW_ORIGIN:
if ((tmp1 = nextint((char *) 0)) < 0)
return;
if ((tmp2 = nextint((char *) 0)) < 0)
return;
prefxpos = tmp1;
prefypos = tmp2;
prefpos = 1;
break;
case SW_WINSIZE:
if ((tmp1 = nextint((char *) 0)) < 0)
return;
if ((tmp2 = nextint((char *) 0)) < 0)
return;
prefxsize = tmp1;
prefysize = tmp2;
prefwsize = 1;
break;
case SW_FONT:
if (fdgets(sbuf, RMTBUF, 0, fd, MAXRMTWAIT) != 0) {
fontface = strdup(sbuf);
if (fontface[strlen(fontface)-1] == '\n')
fontface[strlen(fontface)-1] = '\0';
}
break;
case SW_BACKCOLOR:
if ((tmp1 = nextint((char *) 0)) < 0)
return;
backcolor = tmp1;
break;
case SW_FRONTCOLOR:
if ((tmp1 = nextint((char *) 0)) < 0)
return;
frontcolor = tmp1;
break;
case SW_INTERVAL:
if ((tmp1 = nextint((char *) 0)) < 0)
return;
interval = tmp1;
break;
}
}
static int
pullthecb(colorblock_t *cb, FILE *nfd) {
int c;
int i;
char buf[RMTBUF];
if (debug)
fprintf(stderr, "Retrieving colorblock %d\n", cbindex(cb));
cbresetbar(cb);
/*
* In case he goes away.
*/
if (setjmp(nonsense)) {
if (debug)
fprintf(stderr, "pullthecb: timeout\n");
return(1);
}
alarm(MAXRMTWAIT);
/*
* Get the strings.
*/
if (pullcbinfo(cb))
return(1);
if ((c = getc(nfd)) == 'n') {
if (fdgets(buf, RMTBUF, 0, nfd, MAXRMTWAIT) == 0)
return(1);
if (scriptfd) {
fputc(c, scriptfd);
fputs(buf, scriptfd);
}
buf[strlen(buf)-1] = '\0';
cb->cb_name = strdup(buf);
c = getc(nfd);
}
if (c == 'h') {
if (fdgets(buf, RMTBUF, 0, nfd, MAXRMTWAIT) == 0)
return(1);
if (scriptfd) {
fputc(c, scriptfd);
fputs(buf, scriptfd);
}
buf[strlen(buf)-1] = '\0';
cb->cb_header = strdup(buf);
c = getc(nfd);
}
if (c == 'l') {
i = 0;
do {
if (fdgets(buf, RMTBUF, 0, nfd, MAXRMTWAIT) == 0)
return(1);
if (scriptfd) {
fputc(c, scriptfd);
fputs(buf, scriptfd);
}
buf[strlen(buf)-1] = '\0';
cb->cb_legend[i] = strdup(buf);
i++;
} while ((c = getc(nfd)) == 'l');
}
if (c == EOF)
return(1);
ungetc(c, nfd);
alarm(0);
return(0);
}
int
pulldraw(colorblock_t *cb)
{
double fa[MAXSECTS];
int i;
for (i = 0; i < cb->cb_nsects; i++)
if ((fa[i] = nextfloat((char *) 0)) < 0)
fa[i] = 0;
/*
if (debug) {
printf("cbdraw(");
for (i = 0; i < cb->cb_nsects; i++)
printf("%.3f,", fa[i]);
printf(")\n");
}
*/
CBDRAW(cb, fa[0], fa[1], fa[2], fa[3], fa[4],
fa[5], fa[6], fa[7], fa[8], fa[9]);
return(0);
}
/*
* Auto detect of a script file. Set up from it.
*/
int
scanscript(FILE *fd) {
char mbuf[RMTBUF];
char *s;
int type;
int i;
colorblock_t *cbp;
while (sgets(mbuf, RMTBUF, fd) != NULL) {
if (debug)
fprintf(stderr, "scanscript: received %s", mbuf);
if (*mbuf != '=')
return(1);
if ((type = nextint(mbuf + 1)) < 0)
return(1);
switch (type) {
case S_LAYOUT:
if (sgets(mbuf, RMTBUF, fd) == NULL)
return(1);
sname = strdup(mbuf);
if ((s = strchr(sname, '\n')) != NULL)
*s = '\0';
goto doit;
case S_NSLAYOUT:
goto doit;
case S_SETOPT:
doanoption(fd);
break;
case S_PUSHCB:
if ((i = nextint((char *) 0)) < 0)
return(1);
if (pullthecb(cbinitindex(i), fd))
return(1);
cbp = cbptr(i);
switch (cbp->cb_btype) {
case bdisk:
if (cbp->cb_name == 0)
break;
if ((cbp->cb_disk = diskinfo(cbp->cb_name)) < 0)
return(1);
break;
case bnetip:
if (cbp->cb_name == 0)
break;
if ((cbp->cb_subtype=netifinfo(cbp->cb_name))
< 0)
return(1);
gi_if = 1;
break;
case bnetudp:
gi_udp = 1;
break;
case bnetipr:
gi_ip = 1;
break;
case bnet:
gi_tcp = 1;
break;
case bswps:
gi_swap = 1;
break;
}
break;
case S_TLIMIT: {
int cb;
float tlim;
if ((cb = nextint((char *) 0)) < 0)
return(1);
if ((tlim = nextfloat((char *) 0)) < 0)
return(1);
if (debug)
fprintf(stderr, "scanscript: tlimit %d %f\n",
cb, tlim);
cbptr(cb)->cb_tlimit = tlim;
if (logfd)
fprintf(logfd, "=%d %d %f\n", S_TLIMIT, cb,
tlim);
break;
}
}
}
return(1);
doit:
return(0);
}
void
startremote(void)
{
fprintf(rmtwrite, "=%d\n", S_GO);
fflush(rmtwrite);
}
void
waitstart(void)
{
char rbuf[RMTBUF];
int type;
colorblock_t *cb;
int i;
while (sgets(rbuf, RMTBUF, stdin) != NULL) {
if (*rbuf != '=') {
fprintf(stderr, "%s: protocol error with master\n",
pname);
exit(1);
}
if ((type = nextint(rbuf+1)) == S_GO)
return;
else if (type < 0)
exit(1);
else if (type == S_TLIMIT) {
if ((i = nextint((char *) 0)) < 0)
continue;
else
cb = cbptr(i);
cb->cb_tlimit = nextfloat((char *) 0);
}
else if (debug)
printf("waitstart: bad message\n");
}
exit(1);
}
/*
* Called to wait for and read the next remote data packet.
*/
static int
getremoteinfo(void)
{
char pbuf[RMTBUF];
char sbuf[RMTBUF];
char *buf;
int type;
int i;
colorblock_t *cb;
int harderror = 0;
if (scriptfd) {
fprintf(scriptfd, "=%d %d %d\n", S_SETOPT, SW_INTERVAL,
interval);
}
tryagain:
while (rfgets(pbuf, RMTBUF, 0) != 0) {
/*
* See if any interesting events have happened.
*/
event_scan(1);
/*
* If not a remote protocol packet, just print it
* on the output.
*/
if (*pbuf != '=') {
if (!debug)
printf(pbuf);
continue;
}
buf = pbuf + 1;
/*
* Figure out what the guy wants, and do it.
*/
if ((type = nextint(buf)) < 0)
continue;
if (debug && (type != S_DRAW && type != S_PAUSE))
printf("executing RPC command type %d\n", type);
switch (type) {
/*
* Sleeping for the next interval.
*/
case S_PAUSE:
if (logfd)
fprintf(logfd, "=%d\n", S_PAUSE);
break;
/*
* Draw the values for a bar.
*/
case S_DRAW: {
harderror = 0;
getcb(0);
if (pulldraw(cb))
goto blam;
break;
}
/*
* Draw the legend.
*/
case S_DRAWLEGEND:
getcb(0);
CBDRAWLEGEND(cb);
break;
/*
* Modify tlimit value.
*/
case S_TLIMIT:
if ((i = nextint((char *) 0)) < 0)
return(1);
else
cb = cbptr(i);
cb->cb_tlimit = nextfloat((char *) 0);
if (scriptfd)
fprintf(scriptfd, "=%d %d %.3f\n", S_TLIMIT,
i, cb->cb_tlimit);
if (logfd)
fprintf(logfd, "=%d %d %.3f\n", S_TLIMIT,
i, cb->cb_tlimit);
break;
/*
* Get a colorblock to use.
*/
case S_INIT:
cb = CBINIT();
fprintf(rmtwrite, "%d %d\n", S_INITREPLY, cbindex(cb));
fflush(rmtwrite);
break;
/*
* Put a message in the box.
*/
case S_MESSAGE:
getcb(0);
if (rfgets(sbuf, RMTBUF, 0) != 0)
CBMESSAGE(cb, sbuf);
else
goto blam;
break;
/*
* Layout the window.
*/
case S_LAYOUT:
if (rfgets(sbuf, RMTBUF, 0) != 0) {
sname = strdup(sbuf);
reinitbars();
}
else
goto blam;
if (scriptfd) {
fprintf(scriptfd, "=%d\n", S_LAYOUT);
fputs(sbuf, scriptfd);
}
startremote();
break;
/*
* No title window layout.
*/
case S_NSLAYOUT:
if (scriptfd)
fprintf(scriptfd, "=%d\n", S_NSLAYOUT);
reinitbars();
startremote();
break;
/*
* Handle option switches.
*/
case S_SETOPT:
if (scriptfd) {
fprintf(scriptfd, "=%d ", S_SETOPT);
fputs(pstring, scriptfd);
}
doanoption(rmtpipe);
break;
/*
* Shut up and go home.
*/
case S_TAKEDOWN:
cbtakedown();
break;
/*
* Read back a color bar from the other side and set
* up the local one.
*/
case S_PUSHCB:
if (scriptfd) {
fprintf(scriptfd, "=%d ", S_PUSHCB);
fputs(pstring, scriptfd);
}
if ((i = nextint((char *) 0)) < 0)
return(1);
if (pullthecb(cbptr(i), rmtpipe))
goto blam;
break;
}
}
i = 0;
blam:
{
char mbuf[RMTBUF];
static FILE *stash = 0;
colorblock_t *cbp;
fclose(rmtpipe);
fclose(rmtwrite);
if (!cbptr(0) || cbptr(0)->cb_strwid == 0) {
printf("%s: Lost connection to remote host.\n",
pname);
exit(1);
}
if (++harderror > MAXHARDERROR) {
printf("%s: Can't re-contact remote host.\n", pname);
exit(1);
}
sprintf(mbuf, "Lost connection to remote host; %d retries left",
MAXHARDERROR - harderror);
CBMESSAGE(cbptr(0), mbuf);
i = 1;
event_scan(1);
while (callremote(1)) {
event_scan(1);
if (cbptr(0)) {
sprintf(mbuf,
"Can't establish connection: Retry %d", i);
CBMESSAGE(cbptr(0), mbuf);
}
i++;
}
if (cbptr(0)) {
sprintf(mbuf, "Connection re-established ...");
CBMESSAGE(cbptr(0), mbuf);
}
if (debug)
printf("sending restart data; contents of file:\n");
if (stash == 0) {
stash = scriptfd;
scriptfd = 0;
}
rewind(stash);
while (fgets(mbuf, RMTBUF, stash) != NULL) {
/*
if (debug)
printf("+ %s", mbuf);
*/
fputs(mbuf, rmtwrite);
}
for (;;) {
if (rfgets(pbuf, RMTBUF, 0) == 0)
goto blam;
if (*pbuf != '=')
continue;
if ((type = nextint(pbuf+1)) < 0)
continue;
if (type == S_LAYOUT) {
if (rfgets(mbuf, RMTBUF, 0) == 0)
goto blam;
break;
}
if (type == S_NSLAYOUT)
break;
}
cbp = nextbar(1);
while (cbp != 0) {
cbresetbar(cbp);
cbp = nextbar(0);
}
drawbarreset();
CBLAYOUT(0);
CBREDRAW();
startremote();
goto tryagain;
}
}
/*
* Push the colorbar entries back over the wire.
*/
# define flout(x) fprintf(fd, " %.3f", cbp->cb_ ##x)
# define hxout(y) fprintf(fd, " %#x", cbp->cb_ ##y)
# define flayout(x) {int i; \
for (i=0;i<cbp->cb_nsects;i++) \
flout(x[i]); }
# define hxayout(x) {int i; \
for (i=0;i<cbp->cb_nsects;i++) \
hxout(x[i]); }
# define flin(x) if ((cbp->cb_ ##x = nextfloat((char *) 0))<0)\
return(1);
# define hxin(x) if ((int)(cbp->cb_ ##x = nextint((char *) 0))<0)\
return(1);
# define flayin(x) {int i; \
for (i=0;i<cbp->cb_nsects;i++) \
flin(x[i]); }
# define hxayin(x) {int i; \
for (i=0;i<cbp->cb_nsects;i++) \
hxin(x[i]); }
void
pushcbinfo(colorblock_t *cbp, FILE *fd) {
hxout(flags);
hxout(type);
hxout(interval);
hxout(count);
flout(tlimit);
flout(upmove);
hxout(nsects);
hxout(nmask);
hxout(avgtick);
hxout(avgcnt);
hxout(maxtick);
hxout(maxcnt);
hxout(nsamp);
hxout(tick);
hxout(bigtick);
hxout(limcol.back);
hxout(limcol.front);
hxout(maxcol.back);
hxout(maxcol.front);
hxout(sumcol.back);
hxout(sumcol.front);
hxout(interval);
hxout(count);
hxout(subtype);
hxout(disk);
hxout(btype);
hxayout(colors);
}
int
pullcbinfo(colorblock_t *cbp) {
hxin(flags);
hxin(type);
hxin(interval);
hxin(count);
flin(tlimit);
flin(upmove);
hxin(nsects);
hxin(nmask);
hxin(avgtick);
hxin(avgcnt);
hxin(maxtick);
hxin(maxcnt);
hxin(nsamp);
hxin(tick);
hxin(bigtick);
hxin(limcol.back);
hxin(limcol.front);
hxin(maxcol.back);
hxin(maxcol.front);
hxin(sumcol.back);
hxin(sumcol.front);
hxin(interval);
hxin(count);
hxin(subtype);
hxin(disk);
hxin(btype);
hxayin(colors);
return(0);
}
void
pushbackcb(FILE *fd)
{
colorblock_t *cp;
int i;
if (fd == 0)
fd = stdout;
cp = nextbar(1);
while (cp != 0) {
fprintf(fd, "=%d %d ", S_PUSHCB, cp->cb_rb);
if (debug)
fprintf(stderr, "pushbackcb: %d\n", cp->cb_rb);
pushcbinfo(cp, fd);
fprintf(fd, "\n");
if (cp->cb_name != 0)
fprintf(fd, "n%s\n", cp->cb_name);
if (cp->cb_header != 0)
fprintf(fd, "h%s\n", cp->cb_header);
for (i = 0; i < cp->cb_nsects; i++)
fprintf(fd, "l%s\n", cp->cb_legend[i]);
cp = nextbar(0);
}
}
/*
* Get back an address to use for an init request.
*/
int
rgetcb(void)
{
char buf[RMTBUF];
int type;
if (fgets(buf, RMTBUF, stdin) == NULL) {
fprintf(stderr, "%s: lost connection to master\n", pname);
exit(1);
}
if ((type = nextint(buf)) < 0 || type != S_INITREPLY) {
fprintf(stderr, "%s protocol error with master\n", pname);
exit(1);
}
return(nextint((char *) 0));
}
/*
* Remote handlers.
*/
int
nextint(char *buf)
{
char *tok;
int val;
if ((tok = strtok(buf, " \n")) == NULL)
return(-1);
if (buf != 0)
pstring = buf + strlen(tok) + 1;
else
pstring += strlen(tok) + 1;
val = strtol(tok, (char **) 0, 0);
return(val);
}
char *
nextptr(char *buf)
{
char *tok;
char *val;
if ((tok = strtok(buf, " \n")) == NULL)
return(0);
if (buf != 0)
pstring = buf + strlen(tok) + 1;
else
pstring += strlen(tok) + 1;
val = (char *) strtol(tok, (char **) 0, 0);
return(val);
}
double
nextfloat(char *buf)
{
char *tok;
double val;
if ((tok = strtok(buf, " \n")) == NULL)
return(-1);
val = atof(tok);
return(val);
}
static int
rfgets(char *b, int l, int wait)
{
return(fdgets(b, l, wait, rmtpipe, MAXRMTWAIT));
}
static int
fdgets(char *b, int l, int wait, FILE *fd, int timeo)
{
if (!wait) {
if (setjmp(nonsense)) {
if (debug)
printf("fdgets: timeout\n");
return(0);
}
alarm(timeo);
}
if (fgets(b, l, fd) == NULL) {
if (debug)
printf("fdgets: null read from remote, err = %d\n",
errno);
return(0);
}
if (!wait)
alarm(0);
if (debug) {
char *s;
char *prefix;
if ((b[1] == '3' && b[2] == ' ') ||
(b[1] == '1' && b[2] == '5' && b[3] == '\n'))
return(1);
strcpy(copybuf, b);
if ((s = strchr(copybuf, '\n')) != NULL)
*s = '\0';
prefix = (slave ? "*RR> " : "*LR> ");
printf("%s %s\n", prefix, copybuf);
}
return(1);
}
void
remote_text_end(void) {} /* end of text to lock down */
/*
* Build a remote command line from the options.
*/
static char *
mkrmtcmd(void)
{
static char cmdbuf[256];
char *rmtcmd;
if ((rmtcmd = getenv("GROSVIEWCMD")) && *rmtcmd)
strcpy(cmdbuf, rmtcmd);
else
strcpy(cmdbuf, RMTCMD);
strcat(cmdbuf, " -R -D-");
if (debug)
strcat(cmdbuf, " -d");
return(cmdbuf);
}
/*
* Try to contact the remote and set up the daemon; fail if not possible.
*/
int
callremote(int x)
{
char user[100];
char host[100];
char luser[L_cuserid];
char *cmd;
char *tmp;
int rfd;
int sfd;
int grcode;
sigset(SIGALRM, giveup);
cmd = mkrmtcmd();
if ((tmp = strchr(remotehost, '@')) == NULL) {
strncpy(host, remotehost, 100);
strcpy(user, "guest");
}
else {
strncpy(host, tmp+1, 100);
strncpy(user, remotehost,
(tmp-remotehost>100?100:tmp-remotehost));
user[tmp-remotehost] = '\0';
}
if (cuserid(luser) == NULL) {
fprintf(stderr, "%s: can't identify you!\n", pname);
exit(1);
}
if (debug)
printf("<execute> %s\n", cmd);
if (!x)
printf(" ... attempting to contact %s\n", host);
if (x) {
if (setjmp(nonsense))
return(1);
alarm(RETRYWAIT);
}
if ((rfd = contact(host, user, luser, cmd)) == -1) {
if (x && errno == EINTR) {
alarm(0);
return(1);
}
exit(1);
}
if (x)
alarm(0);
sfd = dup(rfd);
if ((rmtpipe = fdopen(rfd, "r")) == NULL) {
fprintf(stderr,
"%s: Unable to attach standard I/O to remote stream\n",
pname);
exit(1);
}
/* Really inefficient
setbuf(rmtpipe, NULL);
*/
if ((rmtwrite = fdopen(sfd, "w")) == NULL) {
fprintf(stderr,
"%s: Unable to attach standard I/O to remote stream\n",
pname);
exit(1);
}
setbuf(rmtwrite, NULL);
if (debug)
printf("<channel to remote open>\n");
if ((grcode = getremote(!x))) {
if (!x)
exit(1);
else if (grcode >= 10) {
fprintf(stderr,
"%s: cannot reliably reconnect to remote\n",
pname);
fprintf(stderr, "%s: exiting\n", pname);
exit(1);
}
else
return(1);
}
if (!x)
printf(" ... connection open\n");
return(0);
}
static int
getremote(int showerr)
{
char tbuf[RMTBUF];
char buf[RMTBUF];
void giveup();
int vers = VERS_1;
if (rfgets(buf, RMTBUF, 0) == 0) {
if (showerr)
fprintf(stderr, "%s: read from remote system failed\n",
pname);
return(1);
}
switch (nextint(buf)) {
case S_VERSION:
if ((vers = nextint((char *) 0)) <= 0)
goto err;
if (debug)
printf("getremote: version %ld\n", vers);
break;
default:
if (!debug && showerr)
fprintf(stderr, "%s: couldn't understand remote\n",
pname);
goto err;
}
if (vers < myvers) {
if (showerr) {
fprintf(stderr,
"%s: remote version mismatch\n", pname);
fprintf(stderr,
"%s: you must be running at least IRIX 4.0\n",
pname);
fprintf(stderr, "%s: on both systems\n", pname);
}
return(10);
}
if (debug)
printf("getremote: in sync\n");
return(0);
err:
if (showerr && debug) {
while (fdgets(tbuf, RMTBUF, 1, errfd, 2) != 0)
fprintf(stderr, "\"%s\"", tbuf);
fprintf(stderr, "\n");
}
return(10);
}
/*
* Call the remote system using a nice modern interface through
* rexec.
*/
# include <stdio.h>
# include <netdb.h>
static int
contact(char *node, char *user, char *luser, char *cmd)
{
struct servent *seb;
int fd;
char nbuf[128];
char *nnbuf;
int *wanterr = 0;
if ((seb = getservbyname("shell", "tcp")) == 0) {
fprintf(stderr, "Unable to contact name server\n");
return(-1);
}
strcpy(nbuf, node);
nnbuf = nbuf;
if (debug)
wanterr = &errchan;
if (debug)
printf("contact: host %s port %d luser %s user %s\n", nnbuf,
seb->s_port, luser, user);
if ((fd = rcmd(&nnbuf, seb->s_port, luser, user, cmd, wanterr)) == -1) {
fprintf(stderr, "Unable to invoke remote demon\n");
return(-1);
}
/*
* Server to output remote information to local caller.
*/
if (debug) {
errfd = fdopen(errchan, "r");
setbuf(errfd, NULL);
if (fork() == 0) {
char buf[RMTBUF];
fclose(stdin);
fclose(stdout);
close(fd);
while (fgets(buf, RMTBUF, errfd) != NULL) {
fputs("*RE> ", stderr);
fputs(buf, stderr);
}
exit(0);
}
}
return(fd);
}
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