dmake/unix/macosx/tempnam.c

   1 /* RCS  $Id: tempnam.c,v 1.1 2001-02-23 03:44:30 pluby 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
  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 char *
  41 dtempnam(dir, prefix)
  42 char *dir;              /* use this directory please (if non-NULL) */
  43 char *prefix;           /* use this (if non-NULL) as filename prefix */
  44 {
  45    static         int count = 0;
  46    register char *p, *q, *tmpdir;
  47    int            tl=0, dl=0, pl;
  48    char           buf[30];
  49
  50    pl = strlen(P_tmpdir);
  51
  52    if( (tmpdir = getenv("TMPDIR")) != NULL ) tl = strlen(tmpdir);
  53    else if( (tmpdir = getenv("TMP")) != NULL ) tl = strlen(tmpdir);
  54    if( dir != NULL ) dl = strlen(dir);
  55
  56    if( (p = malloc((unsigned)(max(max(dl,tl),pl)+13))) == NULL )
  57      return(NULL);
  58
  59    *p = '\0';
  60
  61    if( (tl == 0) || (d_access( strcpy(p, tmpdir), 0) != 0) )
  62      if( (dl == 0) || (d_access( strcpy(p, dir), 0) != 0) )
  63     if( d_access( strcpy(p, P_tmpdir), 0) != 0 )
  64        if( !prefix )
  65           prefix = "tp";
  66
  67    if(prefix)
  68    {
  69       *(p+strlen(p)+2) = '\0';
  70       (void)strncat(p, prefix, 2);
  71    }
  72
  73    sprintf( buf, "%08x", getpid() );
  74    buf[6]='\0';
  75    (void)strcat(p, buf );
  76    sprintf( buf, "%04d", count++ );
  77    q=p+strlen(p)-6;
  78    *q++ = buf[0]; *q++ = buf[1];
  79    *q++ = buf[2]; *q++ = buf[3];
  80
  81    if( (q = strrchr(p,'.')) != NULL ) *q = '\0';
  82
  83    return(p);
  84 }
  85
  86
  87
  88 d_access( name, flag )
  89 char *name;
  90 int  flag;
  91 {
  92    extern char *DirSepStr;
  93    char *p;
  94    int r;
  95
  96    if( name == NULL || !*name ) return(1);  /* NULL dir means current dir */
  97    r = access( name, flag );
  98    p = name+strlen(name)-1;
  99    if(*p != '/' && *p != '\\') strcat( p, DirSepStr );
 100
 101    return( r );
 102 }