dmake/unix/tempnam.c

   1 /* RCS  $Id: tempnam.c,v 1.2 2002-07-11 08:53:35 mh 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 #ifdef __APPLE__
  27
  28 /*LINTLIBRARY*/
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include <stdlib.h>
  32
  33 #if defined(max)
  34 #   undef  max
  35 #endif
  36 #define max(A,B) (((A)<(B))?(B):(A))
  37
  38 extern char *mktemp();
  39 extern int access();
  40 int d_access();
  41
  42 char *
  43 dtempnam(dir, prefix)
  44 char *dir;      /* use this directory please (if non-NULL) */
  45 char *prefix;       /* use this (if non-NULL) as filename prefix */
  46 {
  47    static         int count = 0;
  48    register char *p, *q, *tmpdir;
  49    int            tl=0, dl=0, pl;
  50    char       buf[30];
  51
  52    pl = strlen(P_tmpdir);
  53
  54    if( (tmpdir = getenv("TMPDIR")) != NULL ) tl = strlen(tmpdir);
  55    else if( (tmpdir = getenv("TMP")) != NULL ) tl = strlen(tmpdir);
  56    if( dir != NULL ) dl = strlen(dir);
  57
  58    if( (p = malloc((unsigned)(max(max(dl,tl),pl)+13))) == NULL )
  59      return(NULL);
  60
  61    *p = '\0';
  62
  63    if( (tl == 0) || (d_access( strcpy(p, tmpdir), 0) != 0) )
  64      if( (dl == 0) || (d_access( strcpy(p, dir), 0) != 0) )
  65     if( d_access( strcpy(p, P_tmpdir), 0) != 0 )
  66        if( !prefix )
  67           prefix = "tp";
  68
  69    if(prefix)
  70    {
  71       *(p+strlen(p)+2) = '\0';
  72       (void)strncat(p, prefix, 2);
  73    }
  74
  75    sprintf( buf, "%08x", getpid() );
  76    buf[6]='\0';
  77    (void)strcat(p, buf );
  78    sprintf( buf, "%04d", count++ );
  79    q=p+strlen(p)-6;
  80    *q++ = buf[0]; *q++ = buf[1];
  81    *q++ = buf[2]; *q++ = buf[3];
  82
  83    if( (q = strrchr(p,'.')) != NULL ) *q = '\0';
  84
  85    return(p);
  86 }
  87
  88
  89
  90 d_access( name, flag )
  91 char *name;
  92 int  flag;
  93 {
  94    extern char *DirSepStr;
  95    char *p;
  96    int r;
  97
  98    if( name == NULL || !*name ) return(1);  /* NULL dir means current dir */
  99    r = access( name, flag );
 100    p = name+strlen(name)-1;
 101    if(*p != '/' && *p != '\\') strcat( p, DirSepStr );
 102
 103    return( r );
 104 }
 105
 106 #endif