dmake/os2/ibm/tempnam.c

   1 /* RCS  $Id: tempnam.c,v 1.1.1.1 2000-09-22 15:33:30 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
  26 /*LINTLIBRARY*/
  27 #include <stdio.h>
  28 #include <string.h>
  29 #include <stdlib.h>
  30 #include "config.h"
  31
  32 #if defined(max)
  33 #   undef  max
  34 #endif
  35 #define max(A,B) (((A)<(B))?(B):(A))
  36
  37 extern int access();
  38 int d_access();
  39
  40 /* MSC stdio.h defines P_tmpdir, so let's undo it here */
  41 /* Under DOS leave the default tmpdir pointing here!        */
  42 #ifdef P_tmpdir
  43 #undef P_tmpdir
  44 #endif
  45 static char *P_tmpdir = "";
  46
  47 char *
  48 tempnam(dir, prefix)
  49 char *dir;      /* use this directory please (if non-NULL) */
  50 char *prefix;       /* use this (if non-NULL) as filename prefix */
  51 {
  52    static         int count = 0;
  53    register char *p, *q, *tmpdir;
  54    int            tl=0, dl=0, pl;
  55    char       buf[30];
  56
  57    pl = strlen(P_tmpdir);
  58
  59    if( (tmpdir = getenv("TMPDIR")) != NULL )
  60       tl = strlen(tmpdir);
  61    else if( (tmpdir = getenv("TMP")) != NULL )
  62       tl = strlen(tmpdir);
  63    if( dir != NULL ) dl = strlen(dir);
  64
  65    if( (p = malloc((unsigned)(max(max(dl,tl),pl)+13))) == NULL )
  66      return(NULL);
  67
  68    *p = '\0';
  69
  70    if( (tl == 0) || (d_access( strcpy(p, tmpdir), 0) != 0) )
  71      if( (dl == 0) || (d_access( strcpy(p, dir), 0) != 0) )
  72     if( d_access( strcpy(p, P_tmpdir), 0) != 0 )
  73        if( !prefix )
  74           prefix = "tp";
  75
  76    if(prefix)
  77    {
  78       *(p+strlen(p)+2) = '\0';
  79       (void)strncat(p, prefix, 2);
  80    }
  81
  82    sprintf( buf, "%08x", getpid() );
  83    buf[6]='\0';
  84    (void)strcat(p, buf );
  85    sprintf( buf, "%04d", count++ );
  86    q=p+strlen(p)-6;
  87    *q++ = buf[0]; *q++ = buf[1];
  88    *q++ = buf[2]; *q++ = buf[3];
  89
  90    if( (q = strrchr(p,'.')) != NULL ) *q = '\0';
  91
  92    return strlwr(p);
  93 }
  94
  95
  96
  97 d_access( name, flag )
  98 char *name;
  99 int  flag;
 100 {
 101    char *p;
 102    int r;
 103
 104    if( name == NULL || !*name ) return(1);  /* NULL dir means current dir */
 105    p = name+strlen(name)-1;
 106    if(*p == ':' ) strcat( p++, "\\" );
 107    r = access( name, flag );
 108    if(*p != '/' && *p != '\\') strcat( p, "\\" );
 109
 110    return( r );
 111 }