#ifndef __send_cmd__#define __send_cmd__ 1 #include <u.h>#include <libc.h> char *MPOINT = "/n/anl/";char *CMD = "rc";char *HOME_DIR = "/home/ericvh"; voidcat  (int f, char *s, char *msg){	char buf[8192];	long n;	int logfd = 2;	int first = 1; 	while((n=read(f, buf, (long)sizeof buf))>0){				/* showing first message */		if (n>0) {			if (first) {				if (msg) {					print ("%s\n", msg);				}				first = 0;			}		}		if(write(1, buf, n)!=n){			fprint(logfd, "%ld %d %s outputing error %s: %r\n", time(0), getpid(), argv0, s);			sysfatal("write error reading %s: %r", s );		}	}	if(n < 0){		fprint(logfd, "%ld %d  %s error reading: %s %r", time(0), getpid(), argv0, s);		sysfatal("error reading %s: %r", s );	}}  voidexecute_cmd (char *cmd){	int clonefd;	char path[1024];	char buf[1024];	int n;	int session_id;	int iofd;	int i;		snprint (path, sizeof(path), "%s/cmd/clone", MPOINT );	clonefd = open(path, ORDWR);  	n = read(clonefd, buf, (long)sizeof buf);	if ( n <= 0) {		sysfatal ("can't read from clone file :%r");	} 	buf[n] = 0;	session_id = atoi (buf);	if ( session_id < 0) {		sysfatal ("getting invalid session id %d [%s]: %r", session_id, buf);	} 	/* changing dir to working dir */	snprint (buf, sizeof(buf), "dir %s", HOME_DIR );	n = write (clonefd, buf, strlen(buf)); 	if (n < 0 ) {		sysfatal ("write failed : %r");	}		snprint (buf, sizeof(buf), "exec %s", cmd );	n = write (clonefd, buf, strlen(buf));	if (n < 0 ) {		sysfatal ("write failed : %r");	} 	/* read and display the content of stdio file */ 	snprint (path, sizeof(path), "%s/cmd/%d/data", MPOINT, session_id );	iofd = open(path, ORDWR); 	if(iofd < 0)		sysfatal("can't open %s: %r", path);	else{		cat (iofd, path, nil );		close (iofd);	} 	/* read and display the content of stderr file */ 	snprint (path, sizeof(path), "%s/cmd/%d/stderr", MPOINT, session_id );	iofd = open(path, OREAD); 	if(iofd < 0)		sysfatal("can't open %s: %r", path);	else{		cat (iofd, path, "STDERR content" );		close (iofd);	} 	close(clonefd);} #endif /* __send_cmd__ */