[syslinux] NEW: COM32 module to alias

[Kevin Landreth]

I like this :)

If/when HPA commits this, you may want to document it on the Wiki here :
http://syslinux.zytor.com/wiki/index.php/Category:Comboot

On Tue, Oct 21, 2008 at 9:37 PM, Gene Cumm <gene.cumm at gmail.com> wrote:

> From: Gene Cumm <gene.cumm at gmail.com>
>
> alias.c: A simple COM32 module that allows the creation of an alias
> within the config for SYSLINUX, etc.
>
> Signed-off-by: Gene Cumm <gene.cumm at gmail.com>
>
> ---
>
> If, for example, you had two labels that only differed by the length
> of the label (a short name) or additional APPENDd parameters, this
> would reduce the amount of copies of the same configuration.
>
> LABEL boot1
> KERNEL kernel
> APPEND initrd=initrd.img
>
> LABEL boot2
> KERNEL kernel
> APPEND initrd=initrd.img extraParamForBoot2
>
> could be shortened to
>
> LABEL boot1
> KERNEL kernel
> APPEND initrd=initrd.img
>
> LABEL boot2
> KERNEL alias.c32
> APPEND boot1 extraParamForBoot2
>
> I created this as I've got several instances of both short names and
> extra APPENDd parameters in a config file I use.  The only thing that
> would be better (if this benefits others) would be an ALIAS option in
> the config file.
>
> com32/modules/alias.c:
>
> /* -----------------------------------------------------------------------
> *
>  *
>  *   Copyright 2008 Gene Cumm - All Rights Reserved
>  *
>  *   This program is free software; you can redistribute it and/or modify
>  *   it under the terms of the GNU General Public License as published by
>  *   the Free Software Foundation, Inc., 53 Temple Place Ste 330,
>  *   Boston MA 02111-1307, USA; either version 2 of the License, or
>  *   (at your option) any later version; incorporated herein by reference.
>  *
>  * -----------------------------------------------------------------------
> */
>
> /*
>  * alias.c
>  *
>  * Alias COM32 application;  Call as a KERNEL with a boot line command as
> the
>  * APPEND line.
>  */
>
> /*
>  * History
>  * b002 Alter the concatenation of the command line arguments to use memcpy
>  * b001 Initial version
>  */
>
> #include <stdio.h>
> #include <stdlib.h>
> // #include <stdbool.h>
> #include <string.h>
>
> #ifdef __COM32__                /* Allow targetting Linux, etc to test */
> #include <syslinux/boot.h>      /* syslinux_run_command() */
> #endif  /* __COM32__ */
>
> #define ALIAS_CMD_SZ    128
>
> // #define DO_DEBUG 1
>
> #define APP_LONGNAME    "Alias COM32"
> #define APP_NAME        "alias"
> #define APP_YEAR        "2008"
> #define APP_AUTHOR      "Gene Cumm"
> #define APP_VER         "beta-b002"
>
> int main(int argc, char *argv[]){
>        char cmdstr[ALIAS_CMD_SZ];      // Command string to execute
>        int curpos;     // Current position in cmdstr; Use memcpy rather
> than strcat
>        int arglen;     // length of current argument string
>        int i;
>
>        // Initialization
>        curpos = 0;
>        cmdstr[0] = 0;
>        for(i=1; i<argc; i++){
>                arglen = strlen(argv[i]);
>                memcpy(cmdstr + curpos, argv[i], arglen);
>                curpos += arglen;
>                cmdstr[curpos] = ' ';
>                curpos += 1;
>                cmdstr[curpos] = 0;
>        }
>        curpos -= 1;
>        cmdstr[curpos] = 0;
> #ifdef DO_DEBUG
>        printf("Parsed arg list\n");
> #endif
>        printf("--alias: '%s'\n", cmdstr);
> #ifdef __COM32__
>        syslinux_run_command(cmdstr);
> #endif  /* __COM32__ */
>
>        return 0;
> }
>
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>


-- 
Kevin Landreth, RHCE