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/*
* Copyright (C) 2005-2006 by CERN/IT/GD/SC
* All rights reserved
*/
#ifndef lint
static char sccsid[] = "@(#)$RCSfile: Cns_getgrpbygid.c,v $ $Revision: 1.3 $ $Date: 2006/08/01 12:41:12 $ CERN IT-GD/SC Jean-Philippe Baud";
#endif /* not lint */
/* Cns_getgrpbygid - get group name associated with a given gid */
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#if defined(_WIN32)
#include <winsock2.h>
#else
#include <unistd.h>
#include <netinet/in.h>
#endif
#include "marshall.h"
#include "Cns_api.h"
#include "Cns.h"
#include "serrno.h"
int DLL_DECL
Cns_getgrpbygid(gid_t gid, char *groupname)
{
int c;
char func[16];
int msglen;
char *q;
char *rbp;
char repbuf[256];
char *sbp;
char sendbuf[REQBUFSZ];
struct Cns_api_thread_info *thip;
strcpy (func, "Cns_getgrpbygid");
if (Cns_apiinit (&thip))
return (-1);
if (! groupname) {
serrno = EFAULT;
return (-1);
}
/* Build request header */
sbp = sendbuf;
marshall_LONG (sbp, CNS_MAGIC);
marshall_LONG (sbp, CNS_GETGRPNAM);
q = sbp; /* save pointer. The next field will be updated */
msglen = 3 * LONGSIZE;
marshall_LONG (sbp, msglen);
/* Build request body */
marshall_LONG (sbp, gid);
msglen = sbp - sendbuf;
marshall_LONG (q, msglen); /* update length field */
c = send2nsd (NULL, NULL, sendbuf, msglen, repbuf, sizeof(repbuf));
if (c == 0) {
rbp = repbuf;
unmarshall_STRING (rbp, groupname);
}
return (c);
}
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