/* $Id: null.c,v 1.8.2.1 2004/04/20 08:50:06 alan Exp $ */
/*
* Stonith module for NULL Stonith device
*
* Copyright (c) 2000 Alan Robertson <alanr@unix.sh>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <portability.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <syslog.h>
#include <libintl.h>
#include <sys/wait.h>
#include <glib.h>
#include <stonith/stonith.h>
#define PIL_PLUGINTYPE STONITH_TYPE
#define PIL_PLUGINTYPE_S STONITH_TYPE_S
#define PIL_PLUGIN null
#define PIL_PLUGIN_S "null"
#define PIL_PLUGINLICENSE LICENSE_LGPL
#define PIL_PLUGINLICENSEURL URL_LGPL
#include <pils/plugin.h>
/*
* nullclose is called as part of unloading the null STONITH plugin.
* If there was any global data allocated, or file descriptors opened, etc.
* which is associated with the plugin, and not a single interface
* in particular, here's our chance to clean it up.
*/
static void
nullclosepi(PILPlugin*pi)
{
}
/*
* nullcloseintf called as part of shutting down the null STONITH
* interface. If there was any global data allocated, or file descriptors
* opened, etc. which is associated with the null implementation,
* here's our chance to clean it up.
*/
static PIL_rc
nullcloseintf(PILInterface* pi, void* pd)
{
return PIL_OK;
}
static void * null_new(void);
static void null_destroy(Stonith *);
static int null_set_config_file(Stonith *, const char * cfgname);
static int null_set_config_info(Stonith *, const char * info);
static const char * null_getinfo(Stonith * s, int InfoType);
static int null_status(Stonith * );
static int null_reset_req(Stonith * s, int request, const char * host);
static char ** null_hostlist(Stonith *);
static void null_free_hostlist(char **);
static struct stonith_ops nullOps ={
null_new, /* Create new STONITH object */
null_destroy, /* Destroy STONITH object */
null_set_config_file, /* set configuration from file */
null_set_config_info, /* Get configuration from file */
null_getinfo, /* Return STONITH info string */
null_status, /* Return STONITH device status */
null_reset_req, /* Request a reset */
null_hostlist, /* Return list of supported hosts */
null_free_hostlist /* free above list */
};
PIL_PLUGIN_BOILERPLATE("1.0", Debug, nullclosepi);
static const PILPluginImports* PluginImports;
static PILPlugin* OurPlugin;
static PILInterface* OurInterface;
static StonithImports* OurImports;
static void* interfprivate;
#define LOG PluginImports->log
#define MALLOC PluginImports->alloc
#define STRDUP PluginImports->mstrdup
#define FREE PluginImports->mfree
#define EXPECT_TOK OurImports->ExpectToken
#define STARTPROC OurImports->StartProcess
PIL_rc
PIL_PLUGIN_INIT(PILPlugin*us, const PILPluginImports* imports);
PIL_rc
PIL_PLUGIN_INIT(PILPlugin*us, const PILPluginImports* imports)
{
/* Force the compiler to do a little type checking */
(void)(PILPluginInitFun)PIL_PLUGIN_INIT;
PluginImports = imports;
OurPlugin = us;
/* Register ourself as a plugin */
imports->register_plugin(us, &OurPIExports);
/* Register our interface implementation */
return imports->register_interface(us, PIL_PLUGINTYPE_S
, PIL_PLUGIN_S
, &nullOps
, nullcloseintf /*close */
, &OurInterface
, (void*)&OurImports
, &interfprivate);
}
#define DEVICE "NULL STONITH device"
#define WHITESPACE " \t\n\r\f"
/*
* Null STONITH device. We are very agreeable, but don't do much :-)
*/
struct NullDevice {
const char * NULLid;
char ** hostlist;
int hostcount;
};
static const char * NULLid = "NullDevice-Stonith";
static const char * NOTnullID = "Hey, dummy this has been destroyed (NullDev)";
#define ISNULLDEV(i) (((i)!= NULL && (i)->pinfo != NULL) \
&& ((struct NullDevice *)(i->pinfo))->NULLid == NULLid)
#ifndef MALLOCT
# define MALLOCT(t) ((t *)(MALLOC(sizeof(t))))
#endif
#define N_(text) (text)
#define _(text) dgettext(ST_TEXTDOMAIN, text)
static int
null_status(Stonith *s)
{
if (!ISNULLDEV(s)) {
syslog(LOG_ERR, "invalid argument to NULL_status");
return(S_OOPS);
}
return S_OK;
}
/*
* Return the list of hosts configured for this NULL device
*/
static char **
null_hostlist(Stonith *s)
{
int numnames = 0;
char ** ret = NULL;
struct NullDevice* nd;
int j;
if (!ISNULLDEV(s)) {
syslog(LOG_ERR, "invalid argument to NULL_list_hosts");
return(NULL);
}
nd = (struct NullDevice*) s->pinfo;
if (nd->hostcount < 0) {
syslog(LOG_ERR
, "unconfigured stonith object in NULL_list_hosts");
return(NULL);
}
numnames = nd->hostcount;
ret = (char **)MALLOC(numnames*sizeof(char*));
if (ret == NULL) {
syslog(LOG_ERR, "out of memory");
return ret;
}
memset(ret, 0, numnames*sizeof(char*));
for (j=0; j < numnames-1; ++j) {
ret[j] = STRDUP(nd->hostlist[j]);
if (ret[j] == NULL) {
null_free_hostlist(ret);
ret = NULL;
return ret;
}
}
return(ret);
}
static void
null_free_hostlist (char ** hlist)
{
char ** hl = hlist;
if (hl == NULL) {
return;
}
while (*hl) {
FREE(*hl);
*hl = NULL;
++hl;
}
FREE(hlist);
hlist = NULL;
}
static int
WordCount(const char * s)
{
int wc = 0;
if (!s) {
return wc;
}
do {
s += strspn(s, WHITESPACE);
if (*s) {
++wc;
s += strcspn(s, WHITESPACE);
}
}while (*s);
return(wc);
}
/*
* Parse the config information, and stash it away...
*/
static int
NULL_parse_config_info(struct NullDevice* nd, const char * info)
{
char ** ret;
int wc;
int numnames;
const char * s = info;
int j;
if (nd->hostcount >= 0) {
return(S_OOPS);
}
wc = WordCount(info);
numnames = wc + 1;
ret = (char **)MALLOC(numnames*sizeof(char*));
if (ret == NULL) {
syslog(LOG_ERR, "out of memory");
return S_OOPS;
}
memset(ret, 0, numnames*sizeof(char*));
for (j=0; j < wc; ++j) {
s += strspn(s, WHITESPACE);
if (*s) {
const char * start = s;
s += strcspn(s, WHITESPACE);
ret[j] = MALLOC((1+(s-start))*sizeof(char));
if (ret[j] == NULL) {
null_free_hostlist(ret);
ret = NULL;
return S_OOPS;
}
strncpy(ret[j], start, (s-start));
g_strdown(ret[j]);
}
}
nd->hostlist = ret;
nd->hostcount = numnames;
return(S_OK);
}
/*
* Pretend to reset the given host on this Stonith device.
* (we don't even error check the "request" type)
*/
static int
null_reset_req(Stonith * s, int request, const char * host)
{
if (!ISNULLDEV(s)) {
syslog(LOG_ERR, "invalid argument to %s", __FUNCTION__);
return(S_OOPS);
}
/* Real devices need to pay attention to the "request" */
/* (but we don't care ;-)) */
syslog(LOG_INFO, _("Host %s null-reset."), host);
return S_OK;
}
/*
* Parse the information in the given configuration file,
* and stash it away...
*/
static int
null_set_config_file(Stonith* s, const char * configname)
{
FILE * cfgfile;
char NULLline[256];
struct NullDevice* nd;
if (!ISNULLDEV(s)) {
syslog(LOG_ERR, "invalid argument to NULL_set_configfile");
return(S_OOPS);
}
nd = (struct NullDevice*) s->pinfo;
if ((cfgfile = fopen(configname, "r")) == NULL) {
syslog(LOG_ERR, "Cannot open %s", configname);
return(S_BADCONFIG);
}
while (fgets(NULLline, sizeof(NULLline), cfgfile) != NULL){
if (*NULLline == '#' || *NULLline == '\n' || *NULLline == EOS) {
continue;
}
return(NULL_parse_config_info(nd, NULLline));
}
return(S_BADCONFIG);
}
/*
* Parse the config information in the given string, and stash it away...
*/
static int
null_set_config_info(Stonith* s, const char * info)
{
struct NullDevice* nd;
if (!ISNULLDEV(s)) {
syslog(LOG_ERR, "%s: invalid argument", __FUNCTION__);
return(S_OOPS);
}
nd = (struct NullDevice *)s->pinfo;
return(NULL_parse_config_info(nd, info));
}
static const char *
null_getinfo(Stonith * s, int reqtype)
{
struct NullDevice* nd;
char * ret;
if (!ISNULLDEV(s)) {
syslog(LOG_ERR, "NULL_idinfo: invalid argument");
return NULL;
}
/*
* We look in the ST_TEXTDOMAIN catalog for our messages
*/
nd = (struct NullDevice *)s->pinfo;
switch (reqtype) {
case ST_DEVICEID:
ret = _("null STONITH device");
break;
case ST_CONF_INFO_SYNTAX:
ret = _("hostname ...\n"
"host names are white-space delimited.");
break;
case ST_CONF_FILE_SYNTAX:
ret = _("hostname ...\n"
"host names are white-space delimited. "
"All host names must be on one line. "
"Blank lines and lines beginning with # are ignored");
break;
case ST_DEVICEDESCR:
ret = _("Dummy (do-nothing) STONITH device\n"
"FOR TESTING ONLY!");
break;
default:
ret = NULL;
break;
}
return ret;
}
/*
* NULL Stonith destructor...
*/
static void
null_destroy(Stonith *s)
{
struct NullDevice* nd;
if (!ISNULLDEV(s)) {
syslog(LOG_ERR, "%s: invalid argument", __FUNCTION__);
return;
}
nd = (struct NullDevice *)s->pinfo;
nd->NULLid = NOTnullID;
if (nd->hostlist) {
null_free_hostlist(nd->hostlist);
nd->hostlist = NULL;
}
nd->hostcount = -1;
FREE(nd);
}
/* Create a new Null Stonith device. Too bad this function can't be static */
static void *
null_new(void)
{
struct NullDevice* nd = MALLOCT(struct NullDevice);
if (nd == NULL) {
syslog(LOG_ERR, "out of memory");
return(NULL);
}
memset(nd, 0, sizeof(*nd));
nd->NULLid = NULLid;
nd->hostlist = NULL;
nd->hostcount = -1;
return((void *)nd);
}
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