dmake/msdos/borland/tempnam.c

   1 /* RCS  $Id: tempnam.c,v 1.1.1.1 2000-09-22 15:33:28 hr Exp $
   2 --
   3 -- SYNOPSIS
   4 --      tempnam
   5 --
   6 -- DESCRIPTION
   7 --      temp file name generation routines.
   8 --
   9 -- AUTHOR
  10 --      Dennis Vadura, dvadura@dmake.wticorp.com
  11 --
  12 -- WWW
  13 --      http://dmake.wticorp.com/
  14 --
  15 -- COPYRIGHT
  16 --      Copyright (c) 1996,1997 by WTI Corp.  All rights reserved.
  17 --
  18 --      This program is NOT free software; you can redistribute it and/or
  19 --      modify it under the terms of the Software License Agreement Provided
  20 --      in the file <distribution-root>/readme/license.txt.
  21 --
  22 -- LOG
  23 --      Use cvs log to obtain detailed change logs.
  24 */
  25 /*LINTLIBRARY*/
  26 #include <stdio.h>
  27 #include <string.h>
  28 #include <stdlib.h>
  29 #include <dos.h>
  30
  31 #if defined(max)
  32 #   undef  max
  33 #endif
  34 #define max(A,B) (((A)<(B))?(B):(A))
  35
  36 extern char *mktemp();
  37 extern int access();
  38 int d_access();
  39
  40 /* Turbo C stdio.h doesn't define P_tmpdir, so let's do it here */
  41 /* Under DOS leave the default tmpdir pointing here!        */
  42 #ifndef P_tmpdir
  43 static char *P_tmpdir = "";
  44 #endif
  45
  46 char *
  47 tempnam(dir, prefix)
  48 char *dir;      /* use this directory please (if non-NULL) */
  49 char *prefix;       /* use this (if non-NULL) as filename prefix */
  50 {
  51    static         int count = 0;
  52    register char *p, *q, *tmpdir;
  53    int            tl=0, dl=0, pl;
  54    char       buf[30];
  55
  56    pl = strlen(P_tmpdir);
  57
  58    if( (tmpdir = getenv("TMPDIR")) != NULL ) tl = strlen(tmpdir);
  59    else if( (tmpdir = getenv("TMP")) != NULL ) tl = strlen(tmpdir);
  60    if( dir != NULL ) dl = strlen(dir);
  61
  62    if( (p = malloc((unsigned)(max(max(dl,tl),pl)+13))) == NULL )
  63      return(NULL);
  64
  65    *p = '\0';
  66
  67    if( (tl == 0) || (d_access( strcpy(p, tmpdir), 0) != 0) )
  68      if( (dl == 0) || (d_access( strcpy(p, dir), 0) != 0) )
  69     if( d_access( strcpy(p, P_tmpdir), 0) != 0 )
  70        if( !prefix )
  71           prefix = "tp";
  72
  73    if(prefix)
  74    {
  75       *(p+strlen(p)+2) = '\0';
  76       (void)strncat(p, prefix, 2);
  77    }
  78
  79    sprintf( buf, "%08x", _psp );
  80    buf[6]='\0';
  81    (void)strcat(p, buf );
  82    sprintf( buf, "%04d", count++ );
  83    q=p+strlen(p)-6;
  84    *q++ = buf[0]; *q++ = buf[1];
  85    *q++ = buf[2]; *q   = buf[3];
  86
  87    if( (q = strrchr(p,'.')) != NULL ) *q = '\0';
  88
  89    return(p);
  90 }
  91
  92
  93
  94 d_access( name, flag )
  95 char *name;
  96 int  flag;
  97 {
  98    extern char *DirSepStr;
  99    char *p;
 100    int r;
 101
 102    if( name == NULL || !*name ) return(1);  /* NULL dir means current dir */
 103    r = access( name, flag );
 104    p = name+strlen(name)-1;
 105
 106    if(*p != '/' && *p != '\\') strcat( p, DirSepStr );
 107
 108    return( r );
 109 }