home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Sprite 1984 - 1993
/
Sprite 1984 - 1993.iso
/
src
/
lib
/
c
/
mig
/
Mig_ReturnHosts.c
< prev
next >
Wrap
C/C++ Source or Header
|
1990-09-24
|
3KB
|
126 lines
/*
* Mig_ReturnHosts.c --
*
* Source code for the Mig_ReturnHosts procedure.
* This procedure returns the specified hosts to the
* pool of idle hosts.
*
* Copyright 1990 Regents of the University of California
* Permission to use, copy, modify, and distribute this
* software and its documentation for any purpose and without
* fee is hereby granted, provided that the above copyright
* notice appear in all copies. The University of California
* makes no representations about the suitability of this
* software for any purpose. It is provided "as is" without
* express or implied warranty.
*/
#ifndef lint
static char rcsid[] = "$Header: /sprite/src/lib/c/mig/RCS/Mig_ReturnHosts.c,v 2.2 90/09/24 14:46:48 douglis Exp $ SPRITE (Berkeley)";
#endif not lint
#include <sprite.h>
#include <mig.h>
#include <host.h>
#include <errno.h>
#include <stdio.h>
#include "migInt.h"
extern int errno;
extern char *strerror();
extern char *malloc();
/*
*----------------------------------------------------------------------
*
* Mig_ReturnHosts --
*
* Return hosts to the pool of idle hosts.
*
* Results:
* A non-zero status indicates an error, in which case errno reflects
* the error from the migration daemon.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
int
Mig_ReturnHosts(numHosts, hostArray)
int numHosts; /* Number of hosts to return, or
* MIG_ALL_HOSTS. */
int *hostArray; /* Array of hostIDs, or NULL if all hosts. */
{
int status; /* Status of system calls. */
int dummyArray[1]; /* Array used in the event of all hosts being
* returned. */
int *arrayPtr; /* Pointer specifying which array to use. */
int size; /* Size of buffer for ioctl. */
int i; /* Counter. */
int actualHosts; /* Number of hosts we really want to return. */
int *allocArray; /* Array used in the event of specific hosts
being returned. */
if (mig_GlobalPdev < 0) {
errno = EINVAL;
return(-1);
}
if (numHosts <= 0 && hostArray != (int *) NULL) {
errno = EINVAL;
return(-1);
}
if (hostArray == (int *) NULL) {
MigHostCache(0, MIG_CACHE_REMOVE_ALL);
arrayPtr = dummyArray;
allocArray = (int *) NULL;
dummyArray[0] = MIG_ALL_HOSTS;
size = sizeof(int);
} else {
allocArray = (int *) malloc(numHosts * sizeof(int));
if (allocArray == (int *) NULL) {
errno = ENOMEM;
return(-1);
}
for (i = 0, actualHosts = 0; i < numHosts; i++) {
int host = hostArray[i];
if (Mig_ConfirmIdle(host) &&
MigHostCache(host, MIG_CACHE_REMOVE, FALSE)) {
allocArray[actualHosts] = host;
actualHosts++;
}
}
if (actualHosts == 0) {
return(0);
}
arrayPtr = allocArray;
size = actualHosts * sizeof(int);
}
if (MigSetAlarm() < 0) {
fprintf(stderr,
"Error setting alarm for contact with migd.\n");
return(-1);
}
status = Fs_IOControl(mig_GlobalPdev, IOC_MIG_DONE,
size, (char *) arrayPtr, 0, (char *) NULL);
if (MigClearAlarm() < 0) {
fprintf(stderr,
"Error clearing alarm for contact with migd.\n");
}
if (allocArray != (int *) NULL) {
free((char *) allocArray);
}
if (status != SUCCESS) {
fprintf(stderr,
"Mig_ReturnHosts: error during ioctl to global master: %s\n",
Stat_GetMsg(status));
errno = Compat_MapCode(status);
return(-1);
}
return(0);
}