ui/ncurses: Add sysinfo screen

Add a simple screen for displaying the struct system_info. We add this
to the main menu as a selectable option, and separate it from the boot
option list with an unselectable blank entry.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>

1 files changed, 249 insertions, 0 deletions

diff --git a/ui/ncurses/nc-sysinfo.c b/ui/ncurses/nc-sysinfo.c
new file mode 100644
index 0000000..4cba9a9
--- /dev/null
+++ b/ui/ncurses/nc-sysinfo.c
@@ -0,0 +1,249 @@
+/*
+ *  Copyright (C) 2013 IBM Corporation
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; version 2 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#define _GNU_SOURCE
+
+
+#include <string.h>
+
+#include <talloc/talloc.h>
+#include <types/types.h>
+#include <log/log.h>
+#include <util/util.h>
+
+#include "config.h"
+#include "nc-cui.h"
+#include "nc-sysinfo.h"
+
+struct sysinfo_screen {
+	struct nc_scr	scr;
+	struct cui	*cui;
+	char		**lines;
+	int		n_lines;
+	int		n_alloc_lines;
+	int		scroll_y;
+	void		(*on_exit)(struct cui *);
+};
+
+static struct sysinfo_screen *sysinfo_screen_from_scr(struct nc_scr *scr)
+{
+	struct sysinfo_screen *sysinfo_screen;
+
+	assert(scr->sig == pb_sysinfo_screen_sig);
+	sysinfo_screen = (struct sysinfo_screen *)
+		((char *)scr - (size_t)&((struct sysinfo_screen *)0)->scr);
+	assert(sysinfo_screen->scr.sig == pb_sysinfo_screen_sig);
+	return sysinfo_screen;
+}
+
+static void sysinfo_screen_draw(struct sysinfo_screen *screen)
+{
+	int max_y, i;
+
+	max_y = getmaxy(screen->scr.sub_ncw);
+
+	max_y = min(max_y, screen->scroll_y + screen->n_lines);
+
+	for (i = screen->scroll_y; i < max_y; i++)
+		mvwaddstr(screen->scr.sub_ncw, i, 1, screen->lines[i]);
+
+	wrefresh(screen->scr.sub_ncw);
+}
+
+static void sysinfo_screen_scroll(struct sysinfo_screen *screen, int key)
+{
+	int win_lines = getmaxy(screen->scr.sub_ncw);
+	int delta;
+
+	if (key == KEY_UP)
+		delta = -1;
+	else if (key == KEY_DOWN)
+		delta = 1;
+	else
+		return;
+
+	if (screen->scroll_y + delta < 0)
+		return;
+	if (screen->scroll_y + delta + win_lines > screen->n_lines - 1)
+		return;
+
+	screen->scroll_y += delta;
+	wscrl(screen->scr.sub_ncw, delta);
+
+	if (delta > 0) {
+		mvwaddstr(screen->scr.sub_ncw, win_lines - 1, 1,
+				screen->lines[screen->scroll_y+win_lines-1]);
+	} else if (delta < 0) {
+		mvwaddstr(screen->scr.sub_ncw, 0, 1,
+				screen->lines[screen->scroll_y]);
+	}
+
+	wrefresh(screen->scr.sub_ncw);
+}
+
+static void sysinfo_clear(struct sysinfo_screen *screen)
+{
+	talloc_free(screen->lines);
+	screen->n_lines = 0;
+	screen->n_alloc_lines = 16;
+	screen->lines = talloc_array(screen, char *, screen->n_alloc_lines);
+}
+
+static __attribute__((format(printf, 2, 3))) void sysinfo_screen_append_line(
+		struct sysinfo_screen *screen, const char *fmt, ...)
+{
+	char *line;
+	va_list ap;
+
+	if (fmt) {
+		va_start(ap, fmt);
+		line = talloc_vasprintf(screen->lines, fmt, ap);
+		va_end(ap);
+	} else {
+		line = "";
+	}
+
+	if (screen->n_lines == screen->n_alloc_lines) {
+		screen->n_alloc_lines *= 2;
+		screen->lines = talloc_realloc(screen, screen->lines,
+						char *, screen->n_alloc_lines);
+	}
+
+	screen->lines[screen->n_lines] = line;
+	screen->n_lines++;
+}
+
+static void mac_str(struct interface_info *info, char *buf, unsigned int buflen)
+{
+	unsigned int i;
+	char *pos;
+
+	assert(buflen > sizeof("unknown"));
+
+	if (!info->hwaddr_size || info->hwaddr_size * 3 + 1 > buflen) {
+		strcpy(buf, "unknown");
+		return;
+	}
+
+	pos = buf;
+
+	for (i = 0; i < info->hwaddr_size; i++) {
+		snprintf(pos, 4, "%02x:", info->hwaddr[i]);
+		pos += 3;
+	}
+
+	*(pos - 1) = '\0';
+
+	return;
+}
+
+static void sysinfo_screen_populate(struct sysinfo_screen *screen,
+		const struct system_info *sysinfo)
+{
+	unsigned int i;
+
+	sysinfo_clear(screen);
+
+#define line(...) sysinfo_screen_append_line(screen, __VA_ARGS__)
+	if (!sysinfo) {
+		line("Waiting for system information...");
+		return;
+	}
+
+	line("%-12s %s", "System type:", sysinfo->type ?: "");
+	line("%-12s %s", "System id:",   sysinfo->identifier ?: "");
+
+	line(NULL);
+	if (sysinfo->n_interfaces)
+		line("Network interfaces");
+
+	for (i = 0; i < sysinfo->n_interfaces; i++) {
+		struct interface_info *info = sysinfo->interfaces[i];
+		char macbuf[32];
+
+		mac_str(info, macbuf, sizeof(macbuf));
+
+		line("%s:", info->name);
+		line(" MAC: %s", macbuf);
+		line(NULL);
+	}
+
+#undef line
+}
+
+static void sysinfo_screen_process_key(struct nc_scr *scr, int key)
+{
+	struct sysinfo_screen *screen = sysinfo_screen_from_scr(scr);
+
+	switch (key) {
+	case 'x':
+		screen->on_exit(screen->cui);
+		break;
+	case KEY_DOWN:
+	case KEY_UP:
+		sysinfo_screen_scroll(screen, key);
+		break;
+	default:
+		break;
+	}
+}
+
+static void sysinfo_screen_resize(struct nc_scr *scr)
+{
+	struct sysinfo_screen *screen = sysinfo_screen_from_scr(scr);
+	sysinfo_screen_draw(screen);
+}
+
+struct nc_scr *sysinfo_screen_scr(struct sysinfo_screen *screen)
+{
+	return &screen->scr;
+}
+
+void sysinfo_screen_update(struct sysinfo_screen *screen,
+		const struct system_info *sysinfo)
+{
+	sysinfo_screen_populate(screen, sysinfo);
+	sysinfo_screen_draw(screen);
+}
+
+struct sysinfo_screen *sysinfo_screen_init(struct cui *cui,
+		const struct system_info *sysinfo,
+		void (*on_exit)(struct cui *))
+{
+	struct sysinfo_screen *screen;
+
+	screen = talloc_zero(cui, struct sysinfo_screen);
+	nc_scr_init(&screen->scr, pb_sysinfo_screen_sig, 0,
+			cui, sysinfo_screen_process_key,
+			NULL, NULL, sysinfo_screen_resize);
+
+	screen->cui = cui;
+	screen->on_exit = on_exit;
+
+	screen->scr.frame.ltitle = talloc_strdup(screen,
+			"Petitboot System Information");
+	screen->scr.frame.rtitle = NULL;
+	screen->scr.frame.help = talloc_strdup(screen, "x=exit");
+	nc_scr_frame_draw(&screen->scr);
+
+	sysinfo_screen_populate(screen, sysinfo);
+	wrefresh(screen->scr.main_ncw);
+	scrollok(screen->scr.sub_ncw, true);
+	sysinfo_screen_draw(screen);
+
+	return screen;
+}