SchOS/ports/ncurses/tinfotest.c

/* SPDX-License-Identifier: Apache-2.0
 *
 * ncurses acceptance test for SchOS.
 *
 * The question this answers is not "did the library compile" -- that much the
 * build already proved -- but "does terminfo work on a SchOS console". Those
 * are different questions, because ncurses can link, initialise, and then
 * return null for every capability it is asked for, at which point a line
 * editor draws nothing and blames itself.
 *
 * So: initialise against the compiled-in fallback, then ask for exactly the
 * capabilities zsh's ZLE needs, and print what came back. Anything reported
 * MISSING here will be a missing feature in the shell later.
 */
#include <curses.h>
#include <term.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/ioctl.h>

static int failures;

/* Capability present and non-empty, or a named failure. The distinction
 * matters: tigetstr returns (char *)-1 for "no such capability in this
 * terminal's description" and NULL for "not in the database at all", and
 * only the second means the port is broken. */
static void
cap(const char *name, const char *what)
{
    char *v = tigetstr((char *)name);
    if (v == (char *)-1) {
        printf("  %-8s %-22s ABSENT (not in this terminal type)\n", name, what);
    } else if (v == NULL) {
        printf("  %-8s %-22s MISSING\n", name, what);
        failures++;
    } else {
        printf("  %-8s %-22s ok (%d bytes)\n", name, what, (int)strlen(v));
    }
}

int
main(void)
{
    struct winsize ws;
    const char *term = getenv("TERM");
    int err = 0;

    printf("ncurses %s on SchOS\n\n", curses_version());

    /* The kernel's idea of the screen, which is what everything lays out
     * against. A hardcoded 80x24 here used to be a kernel bug; print the
     * numbers so a regression is visible rather than merely wrong. */
    if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == 0)
        printf("TIOCGWINSZ   %d cols x %d rows (%dx%d px)\n",
               ws.ws_col, ws.ws_row, ws.ws_xpixel, ws.ws_ypixel);
    else {
        printf("TIOCGWINSZ   FAILED\n");
        failures++;
    }

    if (!term) {
        printf("TERM         unset -- falling back to \"linux\"\n");
        term = "linux";
    } else {
        printf("TERM         %s\n", term);
    }

    /* The whole point of --disable-database: this must succeed with no
     * /usr/share/terminfo anywhere on the system. */
    if (setupterm((char *)term, STDOUT_FILENO, &err) != OK) {
        printf("\nsetupterm failed (err=%d) -- no compiled-in fallback for "
               "\"%s\"\n", err, term);
        return 1;
    }
    printf("setupterm    ok, from compiled-in fallback (no terminfo files)\n");
    printf("             %s\n\n", longname());

    printf("capabilities a line editor needs:\n");
    cap("cup", "absolute cursor move");
    cap("cuu1", "cursor up");
    cap("cud1", "cursor down");
    cap("cub1", "cursor left");
    cap("cuf1", "cursor right");
    cap("el",  "erase to end of line");
    cap("ed",  "erase to end of screen");
    cap("clear", "clear screen");
    cap("bold", "bold");
    cap("sgr0", "reset attributes");
    cap("setaf", "set foreground colour");

    printf("\nkeys ZLE binds:\n");
    cap("kcuu1", "up arrow");
    cap("kcud1", "down arrow");
    cap("kcub1", "left arrow");
    cap("kcuf1", "right arrow");
    cap("khome", "home");
    cap("kend",  "end");
    cap("kdch1", "delete");

    printf("\nnumbers:\n");
    printf("  colors   %d\n", tigetnum((char *)"colors"));
    printf("  cols     %d\n", tigetnum((char *)"cols"));
    printf("  lines    %d\n", tigetnum((char *)"lines"));

    /* Finally, actually drive the terminal. Everything above only read the
     * description; this proves the escape sequences reach the console and
     * that its ANSI parser accepts what ncurses emits. */
    printf("\noutput test: ");
    fflush(stdout);
    char *bold = tigetstr((char *)"bold"), *sgr0 = tigetstr((char *)"sgr0");
    if (bold && bold != (char *)-1 && sgr0 && sgr0 != (char *)-1) {
        putp(bold);
        printf("this should be bold");
        putp(sgr0);
        fflush(stdout);
    }
    printf("\n\n%s\n", failures ? "FAIL" : "PASS");
    return failures ? 1 : 0;
}