osprey/libf/pxf/pxfgetgrgid.c

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/*

  Copyright (C) 2000, 2001 Silicon Graphics, Inc.  All Rights Reserved.

  This program is free software; you can redistribute it and/or modify it
  under the terms of version 2.1 of the GNU Lesser General Public License 
  as published by the Free Software Foundation.

  This program is distributed in the hope that it would be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  

  Further, this software is distributed without any warranty that it is
  free of the rightful claim of any third person regarding infringement 
  or the like.  Any license provided herein, whether implied or 
  otherwise, applies only to this software file.  Patent licenses, if
  any, provided herein do not apply to combinations of this program with 
  other software, or any other product whatsoever.  

  You should have received a copy of the GNU Lesser General Public 
  License along with this program; if not, write the Free Software 
  Foundation, Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, 
  USA.

  Contact information:  Silicon Graphics, Inc., 1600 Amphitheatre Pky,
  Mountain View, CA 94043, or:

  http://www.sgi.com

  For further information regarding this notice, see:

  http://oss.sgi.com/projects/GenInfo/NoticeExplan

*/


#pragma ident  "@(#) libf/pxf/pxfgetgrgid.c 92.1  06/29/99 11:36:06"


#include <fortran.h>
#include <errno.h>
#include <liberrno.h>
#include <malloc.h>
#include <string.h>
#include <grp.h>
#include "pxfstruct.h"
#include "table.h"

#ifndef _UNICOS
#include <stddef.h>
#endif

/*
 *  PXFGETGRGID  -- get group information using group ID
 *  (section 9.2.1 of Posix 1003.9-1992) 
 *
 *  Fortran:
 *      SUBROUTINE PXFGETGRGID(IGID,JGROUP,IERROR)
 *      INTEGER IGID,JGROUP,IERROR
 *
 *  Where:
 *
 *  IGID   is an input integer variable containing the
 *         group ID, for which group information is
 *         requested.
 *
 *  JGROUP is an output handle of type 'group' created
 *         with PXFSTRUCTCREATE.
 *
 *  IERROR is an output integer variable that will contain
 *          the status:
 *
 *           zero    - group information was retrieved.
 *
 *           nonzero - PXFGETGRGID was not successful.
 *
 *          PXFGETGRGID may return any of the following error
 *          values:
 *
 *           ENOENT If IGID contains an non-existant group
 *                  ID.
 *
 *           ENOMEM If memory needed by PXFGETGRGID could not
 *                  be allocated.
 *
 *           EBADHANDLE If JGROUP is invalid.
 */

#ifdef _UNICOS
void
PXFGETGRGID(
#else
void
_PXFGETGRGID(
#endif
       _f_int *IGID,
       _f_int *JGROUP,
       _f_int *IERROR
)
{
  struct group *groupsrc, *groupdest, grouptemp;
  int i, vectorlen;
  char *str, **srcvector, **destvector;
  struct pxfhandle pxfhand;

  /* NOTE: copying to a temporary group struct until copy has successfully
   * completed. */
  pxfhand = _pxfhandle_table_lookup(&_pxfhandle_table, *JGROUP);
  if (pxfhand.pxfstructptr == NULL || pxfhand.pxftype != PXF_GROUP) {
    *IERROR = EBADHANDLE;
    return;
  }
  groupdest = pxfhand.pxfstructptr;

  if ((groupsrc = getgrgid(*IGID)) != NULL) {

    /* copy all the contents of the struct and the data
      * structures pointed to by the struct since UNICOS uses
      * static data which may change. */
    /* copy group name */
    if ((grouptemp.gr_name =
   (char *) malloc((strlen(groupsrc->gr_name)+1)*sizeof(char))) == NULL) {
      *IERROR = ENOMEM;
      return;
    }
    strcpy(grouptemp.gr_name, groupsrc->gr_name);

    /* copy group numeric ID */
    grouptemp.gr_gid = groupsrc->gr_gid;

    /* component: gr_passwd (group password) */
    /*
     * Note: PAssword component currently not supported by Posix 1003.9-1992,
     * but all target OSes support this field, so copy for future support.
     */
    grouptemp.gr_passwd =
       (char *) malloc((strlen(groupsrc->gr_passwd)+1)*sizeof(char));
    if (grouptemp.gr_name == NULL) {
      *IERROR = ENOMEM;
      free(grouptemp.gr_name);
      return;
    }
    (void) strcpy(grouptemp.gr_passwd, groupsrc->gr_passwd);

    /* copy vector of user names */
    srcvector = groupsrc->gr_mem;
    for(vectorlen=0; srcvector[vectorlen] != NULL; vectorlen++);

    /* allocate vector of character string pointers for user names.
     * NOTE: Using calloc so the entries are initiall NULL. This is done
     * so PXFSTRUCTFREE knows which entries need to be free'd. */
    if ((grouptemp.gr_mem =
   (char **) calloc(vectorlen+1,sizeof(char *))) == NULL) {
      free(grouptemp.gr_name);
      *IERROR = ENOMEM;
      return;
    }
    destvector = grouptemp.gr_mem;
    for(i=0; i < vectorlen; i++) {
      if ((destvector[i] =
     (char *) malloc((strlen(srcvector[i])+1)*sizeof(char))) == NULL) {
  for(i--; i >= 0; i--) free(destvector[i]);
  free(grouptemp.gr_name);
  free(grouptemp.gr_mem);
  *IERROR = ENOMEM;
  return;
      }
      strcpy(destvector[i], srcvector[i]);
    }
    destvector[vectorlen] = NULL; /* NULL terminate vector of strings */

    *IERROR = 0;

    /* free up any memory held by original struct & copy temp struct to */
    free(groupdest->gr_name);
    free(groupdest->gr_passwd);
    if (groupdest->gr_mem != NULL) {
      for(i=0; groupdest->gr_mem[i] != NULL; i++) {
  free(groupdest->gr_mem[i]);
      }
      free(groupdest->gr_mem);
    }

    *groupdest = grouptemp;
  } else {
    *IERROR = ENOENT;
  }

}

#ifndef _UNICOS
void
pxfgetgrgid_(
       _f_int *IGID,
       _f_int *JGROUP,
       _f_int *IERROR
)
{
  _PXFGETGRGID( IGID, JGROUP, IERROR);
}
#endif

---