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sloadav.c
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C/C++ Source or Header
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1988-05-26
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1KB
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79 lines
/*
* SLOADAV.C
*
* DNET (c)Copyright 1988, Matthew Dillon, All Rights Reserved
*
* Reports the load average every 5 minutes or until the connection
* is closed.
*/
#include <stdio.h>
#include <sys/wait.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <errno.h>
#include <signal.h>
#include "servers.h"
chandler()
{
union wait stat;
struct rusage rus;
while (wait3(&stat, WNOHANG, &rus) > 0);
}
main(ac,av)
char *av[];
{
long chann = DListen(PORT_LOADAV);
int fd;
int n;
char buf[256];
extern int errno;
if (av[1])
chdir(av[1]);
signal(SIGCHLD, chandler);
signal(SIGPIPE, SIG_IGN);
for (;;) {
fd = DAccept(chann);
if (fd < 0) {
if (errno == EINTR)
continue;
break;
}
if (fork() == NULL) {
do_loadav(fd);
close(fd);
_exit(1);
}
close(fd);
}
perror("SLOADAV");
}
do_loadav(fd)
{
char dummy;
char buf[256];
FILE *fi;
while (ggread(fd, &dummy, 1) == 1) {
fi = popen("la", "r");
if (fi == NULL)
break;
if (fgets(buf, 256, fi)) {
dummy = strlen(buf);
buf[dummy-1] = 0;
gwrite(fd, &dummy, 1);
gwrite(fd, buf, dummy);
}
if (ferror(fi))
break;
pclose(fi);
}
}