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/* RCS $Id: tempnam.c,v 1.1.1.1 2000-09-22 15:33:34 hr Exp $
--
-- SYNOPSIS
-- tempnam
--
-- DESCRIPTION
-- temp file name generation routines.
--
-- AUTHOR
-- Dennis Vadura, dvadura@dmake.wticorp.com
--
-- WWW
-- http://dmake.wticorp.com/
--
-- COPYRIGHT
-- Copyright (c) 1996,1997 by WTI Corp. All rights reserved.
--
-- This program is NOT free software; you can redistribute it and/or
-- modify it under the terms of the Software License Agreement Provided
-- in the file <distribution-root>/readme/license.txt.
--
-- LOG
-- Use cvs log to obtain detailed change logs.
*/
/*LINTLIBRARY*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define max(A,B) (((A)<(B))?(B):(A))
extern char *mktemp();
extern int access();
static char *cpdir();
static char seed[4]="AAA";
/* BSD stdio.h doesn't define P_tmpdir, so let's do it here */
#ifndef P_tmpdir
static char *P_tmpdir = "/tmp";
#endif
char *
tempnam(dir, prefix)
char *dir; /* use this directory please (if non-NULL) */
char *prefix; /* use this (if non-NULL) as filename prefix */
{
register char *p, *q, *tmpdir;
int tl=0, dl=0, pl;
pl = strlen(P_tmpdir);
if( (tmpdir = getenv("TMPDIR")) != NULL ) tl = strlen(tmpdir);
if( dir != NULL ) dl = strlen(dir);
if( (p = malloc((unsigned)(max(max(dl,tl),pl)+16))) == NULL )
return(NULL);
*p = '\0';
if( (tl == 0) || (access( cpdir(p, tmpdir), 3) != 0) )
if( (dl == 0) || (access( cpdir(p, dir), 3) != 0) )
if( access( cpdir(p, P_tmpdir), 3) != 0 )
if( access( cpdir(p, "/tmp"), 3) != 0 )
return(NULL);
(void) strcat(p, "/");
if(prefix)
{
*(p+strlen(p)+5) = '\0';
(void)strncat(p, prefix, 5);
}
(void)strcat(p, seed);
(void)strcat(p, "XXXXXX");
q = seed;
while(*q == 'Z') *q++ = 'A';
++*q;
if(*mktemp(p) == '\0') return(NULL);
return(p);
}
static char *
cpdir(buf, str)
char *buf;
char *str;
{
char *p;
if(str != NULL)
{
(void) strcpy(buf, str);
p = buf - 1 + strlen(buf);
if(*p == '/') *p = '\0';
}
return(buf);
}
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