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Rev 1881 Rev 1988
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int link_computefname(char *fname, const char *linkname, unsigned short env_seg) {
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int link_computefname(char *fname, const char *linkname, unsigned short env_seg) {
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  unsigned short pathlen, doserr = 0;
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  unsigned short pathlen, doserr = 0;
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  /* fetch %DOSDIR% */
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  /* fetch %DOSDIR% */
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  pathlen = env_lookup_valcopy(fname, 128, env_seg, "DOSDIR");
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  pathlen = env_lookup_valcopy(fname, 128, env_seg, "DOSDIR");
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  if (pathlen == 0) {
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  if (pathlen == 0) return(-1);
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    nls_outputnl(29,5); /* "%DOSDIR% not defined" */
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    return(-1);
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  }
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  /* prep filename: %DOSDIR%\LINKS\PKG.LNK */
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  /* prep filename: %DOSDIR%\LINKS\PKG.LNK */
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  if (fname[pathlen - 1] == '\\') pathlen--;
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  if (fname[pathlen - 1] == '\\') pathlen--;
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  pathlen += sprintf(fname + pathlen, "\\LINKS");
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  pathlen += sprintf(fname + pathlen, "\\LINKS");
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  /* create \LINKS if not exists */
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  /* create \LINKS if not exists */