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372 mateuszvis 1 
/*
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 * path
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 *
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 * Displays or sets a search path for executable files.
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 */
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static int cmd_path(struct cmd_funcparam *p) {
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  char *buff = p->BUFFER;
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  /* no parameter - display current path */
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  if (p->argc == 0) {
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    char far *curpath = env_lookup(p->env_seg, "PATH");
373 mateuszvis 13 
    if (curpath == NULL) {
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      outputnl("No Path");
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    } else {
372 mateuszvis 16 
      unsigned short i;
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      for (i = 0;; i++) {
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        buff[i] = curpath[i];
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        if (buff[i] == 0) break;
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      }
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      outputnl(buff);
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    }
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    return(-1);
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  }
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  /* more than 1 parameter */
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  if (p->argc > 1) {
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    outputnl("Too many parameters");
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    return(-1);
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  }
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  /* IF HERE: THERE IS EXACTLY 1 ARGUMENT (argc == 1) */
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  /* help screen (/?) */
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  if (imatch(p->argv[0], "/?")) {
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    output("Displays or sets a search path for executable files.\r\n"
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           "\r\n"
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           "PATH [[drive:]path[;...]]\r\n"
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           "PATH ;\r\n"
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           "\r\n"
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           "Type PATH ; to clear all search-path settings and direct DOS to search\r\n"
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           "only in the current directory.\r\n"
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           "\r\n"
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           "Type PATH without parameters to display the current path.\r\n");
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    return(-1);
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  }
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  /* reset the PATH string (PATH ;) */
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  if (imatch(p->argv[0], ";")) {
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    env_dropvar(p->env_seg, "PATH");
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    return(-1);
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  }
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  /* otherwise set PATH to whatever is passed on command-line */
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  {
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    unsigned short i;
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    strcpy(buff, "PATH=");
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    for (i = 0;; i++) {
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      buff[i + 5] = p->argv[0][i];
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      if (buff[i + 5] == '\r') break;
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    }
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    buff[i + 5] = 0;
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    env_setvar(p->env_seg, buff);
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  }
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  return(-1);
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}