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/*
* $Id: lun2fn.c,v 1.1 2005/03/31 13:13:01 baud Exp $
*/
/*
* Copyright (C) 1990-1999 by CERN/IT/PDP/DM
* All rights reserved
*/
#ifndef lint
static char sccsid[] = "@(#)$RCSfile: lun2fn.c,v $ $Revision: 1.1 $ $Date: 2005/03/31 13:13:01 $ CERN/IT/PDP/DM Frederic Hemmer";
#endif /* not lint */
/* lun2fn.c Remote File I/O - translate FORTRAN LUN to file name */
/*
* C bindings :
*
* assign syntax :
*
* fort.LUN:<filepath>[,<filepath>[,<filepath>...]]
*
* char *lun2fn(int lun)
*
*/
#define RFIO_KERNEL 1 /* system part of Remote File I/O */
#include "rfio.h" /* remote file I/O definitions */
#include <pwd.h> /* password entry structure */
#include <Cpwd.h>
extern char *getenv();
char * DLL_DECL
lun2fn(lun) /* find file name corresponding to lun */
int lun;
{
char *afile; /* assign file name */
FILE *fp; /* a file pointer */
char *p, *p1; /* character pointers */
int clun; /* current lun entry */
static char buf[1024]; /* general purpose buffer */
/*
* Open the assign file, get the corresponding entry
*/
INIT_TRACE("RFIO_TRACE");
TRACE(1, "rfio", "lun2fn: looking environment for %s", "RFASSIGN");
if ((p = getenv("RFASSIGN")) != NULL) {
afile = p;
}
else { /* No RFASSIGN env var, so get the passwd entry */
TRACE(1, "rfio", "lun2fn: getting home directory name");
if ((p = Cgetpwuid(getuid())->pw_dir) == NULL) {
END_TRACE();
return(NULL);
}
sprintf(buf,"%s/%s",p,DEFASNFNAM);
afile = buf;
}
TRACE(1, "rfio", "lun2fn: opening %s", afile);
if ((fp = fopen(afile, "r")) == NULL) {
if (errno == ENOENT) {
#if hpux
sprintf (buf, "ftn%02d", lun);
#else
sprintf (buf, "fort.%d", lun);
#endif
TRACE(1, "rfio", "lun2fn: assigning unit %d to %s", lun, buf);
END_TRACE();
return(buf);
}
else {
END_TRACE();
return(NULL);
}
}
for (;(p=fgets(buf, BUFSIZ, fp)) != NULL;) {
p = strchr(p,'.');
p1 = strchr(p+1, ':');
*(p1++)='\0';
clun = atoi(p+1);
TRACE(1, "rfio", "lun2fn: processing entry %d", clun);
if (clun == lun) { /* matching entry */
p = p1;
/* The string is terminated by \n, \0 or \, */
if ((p1 = strpbrk(p,"\n\0,")) != NULL) {
*p1 = '\0';
}
break;
}
else {
p = NULL;
}
}
(void) fclose(fp);
if (p == NULL) { /* no matching entry */
#if hpux
sprintf (buf, "ftn%d", lun);
#else
sprintf (buf, "fort.%d", lun);
#endif
TRACE(1, "rfio", "lun2fn: assigning unit %d to %s", lun, buf);
END_TRACE();
return(buf);
}
else {
TRACE(1, "rfio", "lun2fn: assigning unit %d to %s", lun, p);
END_TRACE();
return(p);
}
}
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