[ltt-dev] [PATCH] ltt-sessiond: use short options for modprobe in order to support Busybox

[Mathieu Desnoyers]

* Thomas Petazzoni (thomas.petazzoni at free-electrons.com) wrote:
> Many embedded systems are based on Busybox, and therefore use the
> Busybox implementation of modprobe. This implementation does not
> support long options such as --remove and --quiet, only short options
> such as -r and -q are supported.
> 
> This patches changes ltt-sessiond to use the short options, which are
> more widely available, and allows lttng to work easily on a
> Busybox-based system.

Merged, thanks!

Mathieu

> 
> Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
> ---
>  ltt-sessiond/main.c |    8 ++++----
>  1 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/ltt-sessiond/main.c b/ltt-sessiond/main.c
> index 334af53..2c2fe44 100644
> --- a/ltt-sessiond/main.c
> +++ b/ltt-sessiond/main.c
> @@ -211,16 +211,16 @@ static int modprobe_remove_kernel_modules(void)
>  
>  	for (i = ARRAY_SIZE(kernel_modules_list) - 1; i >= 0; i--) {
>  		ret = snprintf(modprobe, sizeof(modprobe),
> -				"/sbin/modprobe --remove --quiet %s",
> +				"/sbin/modprobe -r -q %s",
>  				kernel_modules_list[i].name);
>  		if (ret < 0) {
> -			perror("snprintf modprobe --remove");
> +			perror("snprintf modprobe -r");
>  			goto error;
>  		}
>  		modprobe[sizeof(modprobe) - 1] = '\0';
>  		ret = system(modprobe);
>  		if (ret == -1) {
> -			ERR("Unable to launch modprobe --remove for module %s",
> +			ERR("Unable to launch modprobe -r for module %s",
>  					kernel_modules_list[i].name);
>  		} else if (kernel_modules_list[i].required
>  				&& WEXITSTATUS(ret) != 0) {
> @@ -1490,7 +1490,7 @@ static int modprobe_kernel_modules(void)
>  	for (i = 0; i < ARRAY_SIZE(kernel_modules_list); i++) {
>  		ret = snprintf(modprobe, sizeof(modprobe),
>  			"/sbin/modprobe %s%s",
> -			kernel_modules_list[i].required ? "" : "--quiet ",
> +			kernel_modules_list[i].required ? "" : "-q ",
>  			kernel_modules_list[i].name);
>  		if (ret < 0) {
>  			perror("snprintf modprobe");
> -- 
> 1.7.4.1
> 
> 
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> 

-- 
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com