On 09/12/18 02:45, Kihaguru Gathura wrote:
> Hi,
>
> I am able to send SMS using AT commands and C outside chroot using
> code spinet below
>
> -------------------------------------------------------------------
> #include <stdio.h>
> #include <time.h>
> #include <unistd.h>
>
> #define MODEM_PATH "cu -l /dev/cuaU0 -s 115200"
>
> int main()
> {
> FILE *out;
> char s[40];
>
> printf("Content-type: text/html\n\n");
>
> snprintf(s, sizeof(s), "%s", MODEM_PATH);
> ~
> ~
> ~
> ~
> ~
> ~
> return(0);
> }
> --------------------------------------------------------------------
>
> however, running the program from within chroot, I get the message
>
> /dev/cuaU0 - No such file or directory
>
> All files needed by cu are properly copied to chroot and cu works fine.
>
> Question:
>
> 1: How do i get /dev/cuaU0 device accessible under chroot?
# mkdir $chroot/dev
# cd $chroot/dev
# sh /dev/MAKEDEV ttyU0
Make sure the chroot isn't mounted 'nodev'.
> 2: Is there a better i.e more secure approach to access modem from
> within chroot?
>
