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Simplify the way jobs work and drop the persist type, so all jobs are
fire-and-forget.

Status jobs now managed with two trees of output (new and old), rather
than storing the output in the jobs themselves. When the status line is
processed any jobs which don't appear in the new tree are started and
the output from the old tree displayed. When a job finishes it updates
the new tree with its output and that is used for any subsequent
redraws. When the status interval expires, the new tree is moved to the
old so that all jobs are run again.

This fixes the "#(echo %H:%M:%S)" problem which would lead to thousands
of identical persistent jobs and high memory use (this can still be
achieved by adding "sleep 30" but that is much less likely to happen by
accident).

/* $OpenBSD: cmd-server-info.c,v 1.24 2011/01/26 01:54:56 nicm Exp $ */

/*
 * Copyright (c) 2008 Nicholas Marriott <nicm@users.sourceforge.net>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/types.h>
#include <sys/utsname.h>

#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <vis.h>

#include "tmux.h"

/*
 * Show various information about server.
 */

int	cmd_server_info_exec(struct cmd *, struct cmd_ctx *);

const struct cmd_entry cmd_server_info_entry = {
	"server-info", "info",
	"", 0, 0,
	"",
	0,
	NULL,
	NULL,
	cmd_server_info_exec
};

/* ARGSUSED */
int
cmd_server_info_exec(unused struct cmd *self, struct cmd_ctx *ctx)
{
	struct tty_term				*term;
	struct client				*c;
	struct session				*s;
	struct winlink				*wl;
	struct window				*w;
	struct window_pane			*wp;
	struct tty_code				*code;
	const struct tty_term_code_entry	*ent;
	struct utsname				 un;
	struct job				*job;
	struct grid				*gd;
	struct grid_line			*gl;
	u_int		 			 i, j, k;
	char					 out[80];
	char					*tim;
	time_t		 			 t;
	u_int					 lines, ulines;
	size_t					 size, usize;

	tim = ctime(&start_time);
	*strchr(tim, '\n') = '\0';
	ctx->print(ctx, "pid %ld, started %s", (long) getpid(), tim);
	ctx->print(
	    ctx, "socket path %s, debug level %d", socket_path, debug_level);
	if (uname(&un) == 0) {
		ctx->print(ctx, "system is %s %s %s %s",
		    un.sysname, un.release, un.version, un.machine);
	}
	if (cfg_file != NULL)
		ctx->print(ctx, "configuration file is %s", cfg_file);
	else
		ctx->print(ctx, "configuration file not specified");
	ctx->print(ctx, "protocol version is %d", PROTOCOL_VERSION);
	ctx->print(ctx, "%s", "");

	ctx->print(ctx, "Clients:");
	for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
		c = ARRAY_ITEM(&clients, i);
		if (c == NULL || c->session == NULL)
			continue;

		ctx->print(ctx,"%2d: %s (%d, %d): %s [%ux%u %s bs=%hho] "
		    "[flags=0x%x/0x%x, references=%u]", i, c->tty.path,
		    c->ibuf.fd, c->tty.fd, c->session->name,
		    c->tty.sx, c->tty.sy, c->tty.termname,
		    c->tty.tio.c_cc[VERASE], c->flags,
		    c->tty.flags, c->references);
	}
	ctx->print(ctx, "%s", "");

	ctx->print(ctx, "Sessions: [%zu/%zu]",
	    sizeof (struct grid_cell), sizeof (struct grid_utf8));
	RB_FOREACH(s, sessions, &sessions) {
		t = s->creation_time.tv_sec;
		tim = ctime(&t);
		*strchr(tim, '\n') = '\0';

		ctx->print(ctx, "%2u: %s: %u windows (created %s) [%ux%u] "
		    "[flags=0x%x]", s->idx, s->name,
		    winlink_count(&s->windows), tim, s->sx, s->sy, s->flags);
		RB_FOREACH(wl, winlinks, &s->windows) {
			w = wl->window;
			ctx->print(ctx, "%4u: %s [%ux%u] [flags=0x%x, "
			    "references=%u, last layout=%d]", wl->idx, w->name,
			    w->sx, w->sy, w->flags, w->references,
			    w->lastlayout);
			j = 0;
			TAILQ_FOREACH(wp, &w->panes, entry) {
				lines = ulines = size = usize = 0;
				gd = wp->base.grid;
				for (k = 0; k < gd->hsize + gd->sy; k++) {
					gl = &gd->linedata[k];
					if (gl->celldata != NULL) {
						lines++;
						size += gl->cellsize *
						    sizeof *gl->celldata;
					}
					if (gl->utf8data != NULL) {
						ulines++;
						usize += gl->utf8size *
						    sizeof *gl->utf8data;
					}
				}
				ctx->print(ctx, "%6u: %s %lu %d %u/%u, %zu "
				    "bytes; UTF-8 %u/%u, %zu bytes", j,
				    wp->tty, (u_long) wp->pid, wp->fd, lines,
				    gd->hsize + gd->sy, size, ulines,
				    gd->hsize + gd->sy, usize);
				j++;
			}
		}
	}
	ctx->print(ctx, "%s", "");

	ctx->print(ctx, "Terminals:");
	LIST_FOREACH(term, &tty_terms, entry) {
		ctx->print(ctx, "%s [references=%u, flags=0x%x]:",
		    term->name, term->references, term->flags);
		for (i = 0; i < NTTYCODE; i++) {
			ent = &tty_term_codes[i];
			code = &term->codes[ent->code];
			switch (code->type) {
			case TTYCODE_NONE:
				ctx->print(ctx, "%2u: %s: [missing]",
				    ent->code, ent->name);
				break;
			case TTYCODE_STRING:
				strnvis(out, code->value.string, sizeof out,
				    VIS_OCTAL|VIS_TAB|VIS_NL);
				ctx->print(ctx, "%2u: %s: (string) %s",
				    ent->code, ent->name, out);
				break;
			case TTYCODE_NUMBER:
				ctx->print(ctx, "%2u: %s: (number) %d",
				    ent->code, ent->name, code->value.number);
				break;
			case TTYCODE_FLAG:
				ctx->print(ctx, "%2u: %s: (flag) %s",
				    ent->code, ent->name,
				    code->value.flag ? "true" : "false");
				break;
			}
		}
	}
	ctx->print(ctx, "%s", "");

	ctx->print(ctx, "Jobs:");
	LIST_FOREACH(job, &all_jobs, lentry) {
		ctx->print(ctx, "%s [fd=%d, pid=%d, status=%d]",
		    job->cmd, job->fd, job->pid, job->status);
	}

	return (0);
}