[PATCH] libmisc/shell: Work around tmux bug in row and column

[Sebastian Huber]

On 13.12.23 03:47, chrisj at rtems.org wrote:
> +        const int timeout = 150;
> +        bool row_cols_swapped = false;
>           memset(&buf[0], 0, sizeof(buf));
> +        /*
> +         *https://github.com/tmux/tmux/issues/3457
> +         *
> +         * Tmux has a bug where the lines and cols are swapped. There is a lag
> +         * in the time it takes to get the fix into code so see if tmux is
> +         * running and which version and work around the bug.
> +         *
> +         * CSI > Ps q
> +         *    Ps = 0   =>   DCS > | text ST
> +         */
> +        fputs("\033[>0q", stdout);
> +        fflush(stdout);
> +        if (rtems_shell_term_wait_for(fd, "\033P>|", timeout)) {
> +          int len = rtems_shell_term_buffer_until(fd, buf, sizeof(buf), "\033\\", timeout);
> +          if (len > 0) {
> +            if (memcmp(buf, "tmux ", 5) == 0) {
> +              static const char* bad_versions[] = {
> +                "3.2", "3.2a", "3.3", "3.3a"
> +              };
> +              #define bad_versions_num (sizeof(bad_versions) / sizeof(bad_versions[0]))
> +              size_t i;
> +              for (i = 0; i < bad_versions_num; ++i) {
> +                if (strcmp(bad_versions[i], buf + 5) == 0) {
> +                  row_cols_swapped = true;
> +                  break;
> +                }
> +              }
> +            }
> +          }
> +        }

I think the above new code block could be moved to a helper function 
which returns the value of row_cols_swapped.

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