/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2011 Mikolaj Golub
 * Copyright (c) 2015 Allan Jude <allanjude@freebsd.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/param.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/sysctl.h>
#include <sys/user.h>

#include <err.h>
#include <errno.h>
#include <libprocstat.h>
#include <libutil.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "procstat.h"

static struct {
        const char *name;
        const char *suffix;
} rlimit_param[] = {
        {"cputime",          "sec"},
        {"filesize",         "B  "},
        {"datasize",         "B  "},
        {"stacksize",        "B  "},
        {"coredumpsize",     "B  "},
        {"memoryuse",        "B  "},
        {"memorylocked",     "B  "},
        {"maxprocesses",     "   "},
        {"openfiles",        "   "},
        {"sbsize",           "B  "},
        {"vmemoryuse",       "B  "},
        {"pseudo-terminals", "   "},
        {"swapuse",          "B  "},
        {"kqueues",          "   "},
        {"umtxp",            "   "},
        {"pipebuf",          "B  "},
        {"virtual-machines", "   "},
};

_Static_assert(nitems(rlimit_param) == RLIM_NLIMITS,
    "Resource limits have grown. Add new entries to rlimit_param[].");

static const char *
humanize_rlimit(int indx, rlim_t limit)
{
        static char buf[14];
        int scale;

        if (limit == RLIM_INFINITY)
                return ("infinity     ");

        scale = humanize_number(buf, sizeof(buf) - 1, (int64_t)limit,
            rlimit_param[indx].suffix, HN_AUTOSCALE | HN_GETSCALE, HN_DECIMAL);
        (void)humanize_number(buf, sizeof(buf) - 1, (int64_t)limit,
            rlimit_param[indx].suffix, HN_AUTOSCALE, HN_DECIMAL);
        /* Pad with one space if there is no suffix prefix. */
        if (scale == 0)
                sprintf(buf + strlen(buf), " ");
        return (buf);
}

void
procstat_rlimit(struct procstat *prstat, struct kinfo_proc *kipp)
{
        struct rlimit rlimit;
        int i;

        if ((procstat_opts & PS_OPT_NOHEADER) == 0) {
                xo_emit("{T:/%5s %-16s %-16s %16s %16s}\n",
                    "PID", "COMM", "RLIMIT", "SOFT     ", "HARD     ");
        }
        xo_emit("{ek:process_id/%5d}{e:command/%-16s/%s}", kipp->ki_pid,
            kipp->ki_comm);
        for (i = 0; i < RLIM_NLIMITS; i++) {
                if (procstat_getrlimit(prstat, kipp, i, &rlimit) == -1)
                        return;
                xo_emit("{dk:process_id/%5d} {d:command/%-16s} "
                    "{d:rlimit_param/%-16s} ", kipp->ki_pid, kipp->ki_comm,
                    rlimit_param[i].name);

                xo_open_container(rlimit_param[i].name);
                if (rlimit.rlim_cur == RLIM_INFINITY)
                        xo_emit("{e:soft_limit/infinity}");
                else
                        xo_emit("{e:soft_limit/%U}", rlimit.rlim_cur);

                if (rlimit.rlim_max == RLIM_INFINITY)
                        xo_emit("{e:hard_limit/infinity}");
                else
                        xo_emit("{e:hard_limit/%U}", rlimit.rlim_max);
                xo_close_container(rlimit_param[i].name);

                xo_emit("{d:rlim_cur/%16s} ",
                    humanize_rlimit(i, rlimit.rlim_cur));
                xo_emit("{d:rlim_max/%16s}\n",
                    humanize_rlimit(i, rlimit.rlim_max));
        }
}