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/*
common.h - common functions for NSS lookups
Copyright (C) 2006 West Consulting
Copyright (C) 2006 Arthur de Jong
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
MA 02110-1301 USA
*/
#ifndef _NSS_COMMON_H
#define _NSS_COMMON_H 1
#include <nss.h>
/* translates a nslcd return code (as defined in nslcd.h) to
a nss code (as defined in nss.h) */
enum nss_status nslcd2nss(int code);
/* macros for handling read and write problems, they are
NSS specific due to the return codes */
#define ERROR_OUT_OPENERROR \
*errnop=ENOENT; \
return NSS_STATUS_UNAVAIL;
#define ERROR_OUT_READERROR(fp) \
fclose(fp); \
fp=NULL; \
*errnop=ENOENT; \
return NSS_STATUS_UNAVAIL;
#define ERROR_OUT_BUFERROR(fp) \
fclose(fp); \
fp=NULL; \
*errnop=ERANGE; \
return NSS_STATUS_TRYAGAIN;
#define ERROR_OUT_WRITEERROR(fp) \
ERROR_OUT_READERROR(fp)
#define ERROR_OUT_NOSUCCESS(fp,retv) \
fclose(fp); \
fp=NULL; \
*errnop=ENOENT; \
return nslcd2nss(retv);
/* helper macros available to easily generate {set,get,end}ent functions */
#define NSS_BYGEN(action,param,readfn) \
FILE *fp; \
int32_t tmpint32; \
enum nss_status retv; \
/* open socket and write request */ \
OPEN_SOCK(fp); \
WRITE_REQUEST(fp,action); \
param; \
WRITE_FLUSH(fp); \
/* read response header */ \
READ_RESPONSEHEADER(fp,action); \
/* read response */ \
READ_RESPONSE_CODE(fp); \
readfn(fp,result,buffer,buflen,errnop); \
retv=readfn(fp,result,buffer,buflen,errnop); \
/* check read result */ \
if (retv!=NSS_STATUS_SUCCESS) \
return retv; \
/* close socket and we're done */ \
fclose(fp); \
return NSS_STATUS_SUCCESS;
#define NSS_BYNAME(action,name,readfn) \
NSS_BYGEN(action,WRITE_STRING(fp,name),readfn)
#define NSS_BYTYPE(action,val,type,readfn) \
NSS_BYGEN(action,WRITE_TYPE(fp,val,type),readfn)
#define NSS_BYINT32(action,val,readfn) \
NSS_BYGEN(action,WRITE_INT32(fp,val),readfn)
#define NSS_SETENT(action) \
int32_t tmpint32; \
int errnocp; \
int *errnop; \
errnop=&errnocp; \
/* close the existing stream if it is still open */ \
if (fp!=NULL) \
fclose(fp); \
/* open a new stream and write the request */ \
OPEN_SOCK(fp); \
WRITE_REQUEST(fp,action); \
WRITE_FLUSH(fp); \
/* read response header */ \
READ_RESPONSEHEADER(fp,action); \
return NSS_STATUS_SUCCESS;
#define NSS_GETENT(readfn) \
int32_t tmpint32; \
enum nss_status retv; \
/* check that we have a valid file descriptor */ \
if (fp==NULL) \
{ \
*errnop=ENOENT; \
return NSS_STATUS_UNAVAIL; \
} \
/* read a response */ \
READ_RESPONSE_CODE(fp); \
retv=readfn(fp,result,buffer,buflen,errnop); \
/* check read result */ \
if (retv!=NSS_STATUS_SUCCESS) \
return retv; \
return NSS_STATUS_SUCCESS;
#define NSS_ENDENT() \
if (fp!=NULL) \
fclose(fp); \
return NSS_STATUS_SUCCESS;
#endif /* not _NSS_COMMON_H */
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