Getting console Input from within a Zephyr shell command

[Randall]

I'm trying to create a Zephyr Shell command where I can write a certificate to the modem.  Putting the certificate in the command line doesn't work, so I was going to use the getchar() command to read it in as part of the command operation.  getchar doesn't work.  If I try to use console_getchar() it crashes.  If I power up with console_init then the shell locks up.

I was hoping that there was going to be a shell_getchar() or something similar to the shell_print which I could use to get input.  But I haven't found anything like that.

Is there a way to crack this nut?

[Aslamies]

Here is my implementation:

char* shell_getline(const struct shell *shell, char *buf, const size_t len) {
    if (!buf)
        return NULL;
    
    char *p = buf;
    memset(buf, 0, len);

    for (size_t i = 0; i < (len - 1); i++) {
        char c;
        size_t cnt;

        shell->iface->api->read(shell->iface, &c, sizeof(c), &cnt);
        while (cnt == 0) {    
            k_busy_wait(100);
            shell->iface->api->read(shell->iface, &c, sizeof(c), &cnt);
        }
        shell->iface->api->write(shell->iface, &c, sizeof(c), &cnt);
        if (c == '\n' || c == '\r') {
            break; // end of line
        }
        *p++ = c;
    }

    return buf;
}