/*
 * proc.cpp for Solaris (SunOS)
 *
 * Copyright 1997-1999 Mattias Engdegård
 * Copyright 2005 José Luis Sánchez
 *
 * 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; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 */

#include <stdio.h>
#include <sys/types.h>
#include <sys/param.h> //HZ
#include <sys/socket.h>
#include <sys/stat.h>
#include <dirent.h>
#include <string.h>
#include <fcntl.h>
#include <time.h>
#include <sched.h>

#include "qps.h"
#include "proc.h"
#include "uidstr.h"
#include "ttystr.h"
#include "wchan.h"
#include "details.h"

// Solaris...
#include <sys/swap.h>
#include <sys/sysinfo.h>
#include <sys/mkdev.h>
#include <limits.h>

//#include <sys/procfs.h>
#define _STRUCTURED_PROC 1
#include <sys/procfs.h> //	psinfo_t ,
                        /*
                         *
                        If you want an "#ifdef solaris", the portable way is

                         #if defined (__SVR4) && defined (__sun)

                        This should work on gcc, sun cc, and lots o other compilers, on both sparc and
                        intel.
                        If for some reason, you want to know that Sun forte CC (c++) compiler is being
                        used, something that seems to work is

                        #if defined(__SUNPRO_CC)

                        Whereas for forte cc (regular C), you can use

                        #if defined(__SUNPRO_C)

                         */
#include "proc_common.cpp"

char procdir[128] = "/proc";

int page_k_shift; //

extern int flag_thread_ok;
extern bool flag_show_thread;
extern bool flag_devel;

kstat_ctl_t *Proc::kc = 0;

int proc_PID_fd(const int pid)
{
    char path[128];
    int numfd;

    sprintf(path, "/proc/%d/fd", pid);

    QDir qdir(path);
    numfd = qdir.count();

    /// num_opened_files += numfd;
    //	  printf("PID %d: %d opened files\n", pid, numfd);
    return TRUE;
}

Procinfo::Procinfo(Proc *system_proc, int process_id, int thread_id) : refcnt(1)
{
    proc = system_proc; //
    first_run = true;
    clone = false;

    if (thread_id < 0)
    {
        pid = process_id;
        tgid = process_id;
    }
    else
    {
        pid = thread_id;
        tgid = process_id;
    }

    detail = NULL;
    ///   children = 0;

    envblock = 0;
    //	  if( readproc(proc_pid) < 0 ) pid = -1;		//
    // invalidate object,
    // will be deleted

    ppid = 0; // no parent important!!
    selected = false;
    hidekids = false;
    envblock = 0; //!!

    table_child_seq = -1;
    child_seq_prev = -1;

    lastchild = 0;
    generation = -1;
    detail = 0;

    size = 0;
    resident = 0;
    // trs=0;
    // drs=0;
    // stack=0;
    // share=0;
    mem = 0;

    io_read_prev = 0;
    io_write_prev = 0;

    // tgid=0;
    pcpu = 0;
    pmem = 0;

    command = "noname";
    tty = 0;
    nice = 0;
    starttime = 0;
    state = 'Z';
    cutime = utime = 0;

    old_utime = 0;
}

// COMMON?
Procinfo::~Procinfo()
{
    if (detail)
    {
        detail->process_gone();
        detail = 0;
    }

    /*
    if( envblock )
            free(envblock);
    if( maps )
    {
     //   maps->purge();
            delete maps;
    }
    if( fd_files )
    {
       // fd_files->purge();
            delete fd_files;
    } */
    ///   delete children;
}

// miscellaneous static initializations
void Proc::init_static()
{
    if (!kc)
    {
        kc = kstat_open();
        if (!kc)
        {
            perror("kstat_open");
            exit(1);
        }
    }

    int pagesize = sysconf(_SC_PAGESIZE); // same getpagesize()  in <unistd.h>
    printf("pagesize=%d, %d\n ", getpagesize(), sysconf(_SC_PAGESIZE)); // 4027

    page_k_shift = 0;
    for (int j = getpagesize(); j > 1024; j >>= 1)
        page_k_shift++;
}

// return number of bytes read if ok, -1 if failed
int read_file(char *name, void *buf, int max)
{
    int fd = open(name, O_RDONLY);
    if (fd < 0)
        return -1;
    int r = read(fd, buf, max);
    close(fd);
    return r;
}

// SOLARIS
//	Description : read /proc/1234/task/*  tasks(thread,LWP)
//			  add to Proc::procs[]
int Proc::read_pid_tasks(int pid)
{
    char path[256];
    char *p;
    struct dirent *e;
    int thread_pid;
    int thread_n = 0;

    //	printf("DEBUG:pid=%d :",pid);
    sprintf(path, "%s/%d/lwp", procdir, pid);

    DIR *d = opendir(path);
    if (!d)
        return -1;

    while ((e = readdir(d)) != 0)
    {
        if (e->d_name[0] == '.')
            continue; // skip "." , ".."

        Procinfo *pi;
        thread_pid = atoi(e->d_name); // only number !!

        if (pid == thread_pid)
            continue; // skip

        /*
                Procinfo *pi = new Procinfo(this,pid, thread_id);

                if(pi->pid == -1)
                        delete pi;		// already gone

                else {
                        pi->generation = current_gen;
                        pi->cmdline="(thread)";
                  //  newproc(pi);
                }
        */
        pi = procs.value(thread_pid, NULL);

        if (pi == NULL)
        {
            pi = new Procinfo(this, pid, thread_pid);
            procs.insert(thread_pid, pi);
        }
        if (pi->readproc() >= 0)
        {
            pi->generation = current_gen;
            //		if(pid!=thread_pid)
            // pi->cmdline="(thread)";
        }

        thread_n++;
    }
    /// printf("\n");
    closedir(d);
    return thread_n;
}

// DEL ( because of 2byte language)
static inline bool isprintable(unsigned char c)
{
    // assume, somewhat na.vely, that all latin-1 characters are printable
    return (c >= 0x20 && c < 0x7f) || c >= 0xa0;
}

// DEL replace unprintables by spaces
static void make_printable(char *s)
{
    while (*s)
    {
        if (!isprintable(*s))
            *s = ' ';
        ++s;
    }
}

// what this fuck..??? move to readproc
/* void Proc::newproc(Procinfo *p)
{
        Procinfo *oldp = procs[p->pid];

        //if(oldp && flag_thread_ok && (previous_flag_show_thread !=
flag_show_thread) ){
        //	  oldp->deref();
        //	  oldp =NULL;
   // }
        {
                // New process
                p->wcpu = p->pcpu;	// just a start
        }
} */

// read proc/PID Solaris 10, not tested in Solaris 9
int Procinfo::readproc()
{
    char path[256];

    //	Procinfo:pid;
    proc_PID_fd(pid); // check!!
    sprintf(path, "%s/%d/psinfo", procdir, pid);

    psinfo_t psi;
    if (read_file(path, (void *)&psi, sizeof(psi)) < (int)sizeof(psi))
        return -1;

    sprintf(path, "%s/%d/usage", procdir, pid);
    prusage_t pru;
    if (read_file(path, (void *)&pru, sizeof(pru)) < (int)sizeof(pru))
        return -1;

    if (first_run)
    {

        first_run = false;
    }
    minflt = pru.pr_minf;
    majflt = pru.pr_majf;

    uid = psi.pr_uid;   // ok
    euid = psi.pr_euid; // ok
    gid = psi.pr_gid;   // ok
    egid = psi.pr_egid; // ok

    //	  make_printable(psi.pr_psargs);
    cmdline = psi.pr_psargs; // ok
    command = psi.pr_fname;

    ppid = psi.pr_ppid;   // ok
    pgrp = psi.pr_pgid;   // ok
    session = psi.pr_sid; // ok
    tty = psi.pr_ttydev;  // ok type?

    nthreads = psi.pr_nlwp; // num of threads

    //------- no checked
    const int ns_ticks = 1000000000 / HZ; // HZ=100, clk_tick
    // printf("ns_ticks=%d\n",ns_ticks);// 10000000
    //	  starttime = (psi.pr_start.tv_sec) * HZ   +
    // psi.pr_start.tv_nsec /
    // ns_ticks;
    starttime = psi.pr_start.tv_sec; // discard tv_nsec
    env_ofs = psi.pr_envp;
    addr_bits = psi.pr_dmodel == PR_MODEL_ILP32 ? 32 : 64;

    gettimeofday(&tv, 0); // current_time, sys/time , tv.tv_sec, tv.tv_usec

    // god dam!!!! if that dont reel in the ladies then nothing will!!!!

    // No
    state = psi.pr_lwp.pr_sname; // no
    command = (state == 'Z') ? "<zombie>" : psi.pr_fname;
    flags = psi.pr_flag; // no

    // No
    utime = psi.pr_time.tv_sec * HZ + psi.pr_time.tv_nsec / ns_ticks; //??
    cutime = psi.pr_ctime.tv_sec * HZ + psi.pr_ctime.tv_nsec / ns_ticks;

    //	printf("[%d] utime=%d\n",pid,utime);

    int dcpu;
    if (old_utime == 0 and utime == 0)
    {
        pcpu = 0;
    }
    else
    {
        dcpu = utime - old_utime;

        // calculate pcpu (and wcpu for Linux) from previous procinfo
        int dt = (tv.tv_usec - old_tv.tv_usec) / (1000000 / HZ) +
                 (tv.tv_sec - old_tv.tv_sec) * HZ;

        if (dt == 0)
            pcpu = 0;
        else
            pcpu = 100.0 * dcpu / dt;

        //	if( pcpu > 99.99 )	pcpu = 99.99;

        old_utime = utime;
        old_tv = tv;
    }

    priority = psi.pr_lwp.pr_pri;
    nice = psi.pr_lwp.pr_nice;
    if (Qps::normalize_nice) //???
        nice -= NZERO;

    wchan = psi.pr_lwp.pr_wchan;

    // MEM
    size = psi.pr_size;
    resident = psi.pr_rssize;
    which_cpu = psi.pr_lwp.pr_onpro;

    // pr_pctcpu and pr_pctmem are scaled so that 1.0 is stored as 0x8000.
    // We rescale pcpu so a CPU-bound process is shown as 100%. (This means
    // that wcpu may exceed 100% with several LWPs.)
    wcpu = psi.pr_pctcpu * (1 / 327.68) * proc->num_cpus;
    pmem = psi.pr_pctmem * (1 / 327.68);

    rtprio = -1; // ditto
    policy_name[0] = psi.pr_lwp.pr_clname[0];
    policy_name[1] = psi.pr_lwp.pr_clname[1];

    if (dcpu == 0)
        return 1;
    return 2; // this process consumed jiffi of cpu
}

// thread	Solaris 10
int Procinfo::readproc(int proc_pid, int thread)
{
    char ppath[256];
    char upath[256];

    pid = proc_pid;

    proc_PID_fd(pid);

    if (!flag_thread_ok || !flag_show_thread)
    {
        return readproc();
    }
    // get the process stuff
    // readproc();

    pid = thread; //*****

    sprintf(ppath, "%s/%d/lwp/%d/lwpsinfo", procdir, proc_pid, thread);
    sprintf(upath, "%s/%d/lwp/%d/lwpusage", procdir, proc_pid, thread);

    lwpsinfo_t psi;
    if (read_file(ppath, (void *)&psi, sizeof(psi)) < (int)sizeof(psi))
    {
        return -1;
    }

    prusage_t pru;
    if (read_file(upath, (void *)&pru, sizeof(pru)) < (int)sizeof(pru))
    {
        return -1;
    }

    state = psi.pr_sname;
    flags = psi.pr_flag;
    const int ns_ticks = 1000000000 / HZ;
    utime = psi.pr_time.tv_sec * HZ + psi.pr_time.tv_nsec / ns_ticks;
    priority = psi.pr_pri;
    nice = psi.pr_nice;
    if (Qps::normalize_nice)
        nice -= NZERO;
    starttime = (psi.pr_start.tv_sec - proc->boot_time) * HZ +
                psi.pr_start.tv_nsec / ns_ticks;
    wchan = psi.pr_wchan;

    minflt = pru.pr_minf;
    majflt = pru.pr_majf;
    which_cpu = psi.pr_onpro;

    // pr_pctcpu and pr_pctmem are scaled so that 1.0 is stored as 0x8000.
    // We rescale pcpu so a CPU-bound process is shown as 100%. (This means
    // that wcpu may exceed 100% with several LWPs.)
    if (psi.pr_pctcpu)
    {
        wcpu = (psi.pr_pctcpu / 327.68) * proc->num_cpus;
    }
    else
    {
        wcpu = 0.0;
    }
    gettimeofday(&tv, 0); //
    rtprio = -1;          // ditto
    policy_name[0] = psi.pr_clname[0];
    policy_name[1] = psi.pr_clname[1];
    /// num_process++;
    return pid;
    // thread Solaris10
}

static float getscaled(kstat_t *ks, const char *name)
{
    // load avgs are scaled by 256
    kstat_named_t *kn = (kstat_named_t *)kstat_data_lookup(ks, (char *)name);
    return kn ? kn->value.ui32 * (1 / 256.0) : 0.0;
}

void Proc::read_loadavg()
{
    kstat_chain_update(kc);

    kstat_t *ks = kstat_lookup(kc, (char *)"unix", 0, (char *)"system_misc");
    if (!ks || kstat_read(kc, ks, 0) == -1)
    {
        perror("kstat_lookup/read");
        exit(1);
    }

    loadavg[0] = getscaled(ks, "avenrun_1min");
    loadavg[1] = getscaled(ks, "avenrun_5min");
    loadavg[2] = getscaled(ks, "avenrun_15min");

    // we might as well get the boot time too since it's in the same kstat
    // (not that it is going to change)
    kstat_named_t *kn;
    kn = (kstat_named_t *)kstat_data_lookup(ks, (char *)"boot_time");
    if (kn)
        boot_time = kn->value.ui32;
}

// read /proc
// called by Proc::fresh();
int Proc::read_system()
{
    static bool first_run = true;
    if (first_run)
    {
        flag_thread_ok = true;

        // memory info: this is easy - just use sysconf
        mem_total = sysconf(_SC_PHYS_PAGES) << page_k_shift;
        mem_free = sysconf(_SC_AVPHYS_PAGES) << page_k_shift;

        // Max SMP 1024 cpus . COMMON
        int max_cpus = 1024;
        // cpu_times_vec = (unsigned *)malloc(sizeof(unsigned) *
        // num_cpus *
        // CPUTIMES);
        cpu_times_vec = new unsigned[CPUTIMES * max_cpus];
        old_cpu_times_vec = new unsigned[CPUTIMES * max_cpus];

        // init
        for (int cpu = 0; cpu < max_cpus; cpu++)
            for (int i = 0; i < CPUTIMES; i++)
            {
                cpu_times(cpu, i) = 0;
                old_cpu_times(cpu, i) = 0;
            }

        /*
                if(cpu_times_vec)
                {
                        if(old_cpu_times_vec)  free(old_cpu_times_vec);
                        old_cpu_times_vec = cpu_times_vec;
                        cpu_times_vec = (unsigned
           *)malloc(sizeof(unsigned) *
           num_cpus * CPUTIMES);
                }
                        old_num_cpus = num_cpus;
         */
        first_run = 0;
    }

    // get swap info: somewhat trickier - we have to count all swap spaces
    int nswaps = swapctl(SC_GETNSWP, 0);
    swaptbl_t *st =
        (swaptbl_t *)malloc(sizeof(int) + nswaps * sizeof(swapent_t));
    st->swt_n = nswaps;
    // We are not interested in the paths, just the values, so we allocate
    // one scratch buffer for all paths to keep swapctl happy.
    char path_buf[PATH_MAX + 1];

    for (int i = 0; i < nswaps; i++)
        st->swt_ent[i].ste_path = path_buf;
    swapctl(SC_LIST, st);

    // count the swap spaces
    swap_total = swap_free = 0;
    for (int i = 0; i < nswaps; i++)
    {
        swap_total += st->swt_ent[i].ste_pages;
        swap_free += st->swt_ent[i].ste_free;
    }
    swap_total <<= page_k_shift;
    swap_free <<= page_k_shift;
    free(st);

    // cpu states: are stored as kstats named "cpu_statN", where N is the
    // cpu number. Unfortunately, the cpu numbers are not guessable so we
    // sweep the kstat chain for all of them, assuming (foolishly?)
    // that they are in order.

    // kstat_chain_update(kc);
    int cpu = 0;

    for (kstat_t *ks = kc->kc_chain; ks; ks = ks->ks_next)
    {
        // printf("kstat name :%s\n",ks->ks_name);

        if (strncmp(ks->ks_name, "cpu_stat", 8) == 0)
        {
            if (kstat_read(kc, ks, NULL) == -1)
            {
                perror("kstat_read");
                exit(1);
            }
            cpu_stat_t *cs = (cpu_stat_t *)ks->ks_data;
            cpu_times(cpu, CPUTIME_USER) = cs->cpu_sysinfo.cpu[CPU_USER];
            cpu_times(cpu, CPUTIME_SYSTEM) = cs->cpu_sysinfo.cpu[CPU_KERNEL];
            cpu_times(cpu, CPUTIME_WAIT) = cs->cpu_sysinfo.cpu[CPU_WAIT];
            cpu_times(cpu, CPUTIME_IDLE) = cs->cpu_sysinfo.cpu[CPU_IDLE];

            cpu++;
        }
    }
    Proc::num_cpus = cpu;

    // exit(1);
    dt_total = 0;
    dt_used = 0;

    // dt_used= user + system;
    // dt_total= user + system + nice + idle
    // dt_used+=cpu_times(cpu, CPUTIME_USER) + cpu_times(cpu,
    // CPUTIME_SYSTEM);
    // dt_total=dt_used

    cpu_times(num_cpus, CPUTIME_USER) = 0;
    cpu_times(num_cpus, CPUTIME_SYSTEM) = 0;
    cpu_times(num_cpus, CPUTIME_WAIT) = 0;
    cpu_times(num_cpus, CPUTIME_IDLE) = 0;
    for (int cpu = 0; cpu < num_cpus; cpu++)
    {
        cpu_times(num_cpus, CPUTIME_USER) += cpu_times(cpu, CPUTIME_USER);
        cpu_times(num_cpus, CPUTIME_SYSTEM) += cpu_times(cpu, CPUTIME_SYSTEM);
        cpu_times(num_cpus, CPUTIME_WAIT) += cpu_times(cpu, CPUTIME_WAIT);
        cpu_times(num_cpus, CPUTIME_IDLE) += cpu_times(cpu, CPUTIME_IDLE);
    }

    cpu = num_cpus;
    dt_used +=
        cpu_times(cpu, CPUTIME_USER) + cpu_times(cpu, CPUTIME_SYSTEM); // Kernel
    dt_total += cpu_times(cpu, CPUTIME_USER) + cpu_times(cpu, CPUTIME_SYSTEM) +
                cpu_times(cpu, CPUTIME_WAIT) + cpu_times(cpu, CPUTIME_IDLE);

    load_cpu = (float)Proc::dt_used / Proc::dt_total;

    // Hotplugging Detection : save total_cpu
    if (Proc::num_cpus != Proc::old_num_cpus)
    {
        //	for(int i = 0; i < CPUTIMES; i++)
        //		cpu_times(num_cpus, i) =
        // cpu_times(Proc::old_num_cpus, i);
        //		Proc::old_num_cpus=Proc::num_cpus;
    }
}

int Procinfo::get_policy()
{
    if (policy == -1)
        policy = sched_getscheduler(pid);
    return policy;
}

int Procinfo::get_rtprio()
{
    if (rtprio == -1)
    {
        struct sched_param p;
        if (sched_getparam(pid, &p) == 0)
            rtprio = p.sched_priority;
    }
    return rtprio;
}

// called by bool Procinfo::read_fds()
void Procinfo::read_fd(int fdnum, char *path)
{
    struct stat sb;

    if (lstat(path, &sb) < 0)
    {
        // The file has been closed, or we could really not stat it
        // despite
        // having it open (could be a fd passed from another process).
        fd_files.append(new Fileinfo(fdnum, "(no info available)"));
        return;
    }
    // We could in principle find out more about the fd, such as its mode
    // (RDONLY, RDWR etc) and flags, but it's messy. pfiles uses an agent
    // lwp
    // for this, but I don't know how to do it.
    QString s;
    const char *n;
    switch (sb.st_mode & S_IFMT)
    {
    case S_IFCHR:
        // if it is a tty, we might know its real name
        if (sb.st_rdev != (dev_t)-1)
        {
            QString t = Ttystr::name(sb.st_rdev);
            if (t[0] != '?')
            {
                s = "/dev/";
                s.append(t);
                break;
            }
        }
        s.sprintf("char device %u:%u", (unsigned)major(sb.st_rdev),
                  (unsigned)minor(sb.st_rdev));
        break;

    case S_IFBLK:
        s.sprintf("block device %u:%u", (unsigned)major(sb.st_rdev),
                  (unsigned)minor(sb.st_rdev));
        break;

    case S_IFLNK:
        // Directories appear as symlinks in /proc/#/fd; we chdir() to
        // it
        // and see where we end up. Not efficient though.
        // Besides, we change cwd a lot in unpredictable ways. This
        // makes
        // core dumps hard to find, if they are generated at all.
        s = "directory ";
        if (chdir(path) >= 0)
        {
            char buf[512];
            if (getcwd(buf, sizeof(buf)) >= 0)
            {
                s.append(buf);
                break;
            }
        }
        s.append("(unknown)");
        break;

    default:
        switch (sb.st_mode & S_IFMT)
        {
        case S_IFIFO: // fifo or anonymous pipe
            n = "pipe";
            break;
        case S_IFDIR: // this shouldn't happen
            n = "directory";
            break;
        case S_IFREG:
            n = "file";
            break;
        case S_IFSOCK:
            n = "unix domain socket";
            break;
        case S_IFDOOR:
            n = "door";
            break;
        default:
            n = "unknown";
            break;
        }
        s.sprintf("%s, dev %u:%u inode %u", n, (unsigned)major(sb.st_dev),
                  (unsigned)minor(sb.st_dev), (unsigned)sb.st_ino);
        break;
    }
    fd_files.append(new Fileinfo(fdnum, s));
}

// return TRUE if /proc/PID/fd could be read, FALSE otherwise
// store fileinfo, and also socket inodes separately
bool Procinfo::read_fds()
{
    char path[80], *p;

    sprintf(path, "%s/%d/fd", procdir, pid);

    DIR *d = opendir(path);
    if (!d)
        return FALSE;

    p = path + strlen(path) + 1;
    p[-1] = '/';

    struct dirent *e;
    while ((e = readdir(d)) != 0)
    {
        if (e->d_name[0] == '.')
            continue; // skip . and ..
        strcpy(p, e->d_name);
        int fdnum = atoi(p);
        read_fd(fdnum, path);
    }
    closedir(d);
    return TRUE;
}

// return TRUE if the process environment could be read, FALSE otherwise
bool Procinfo::read_environ()
{
    int fd;
    char file[128];

    return 0;

    sprintf(file, "/proc/%d/as", pid);
    if ((fd = open(file, O_RDONLY)) < 0)
        return FALSE;

    // Just read the first 8K from the environment. Adaptive code here is
    // possible, but not really worth the effort.
    int bs = 8192;
    if (envblock)
        free(envblock);
    envblock = (char *)malloc(bs);
    if (pread(fd, envblock, bs, env_ofs) < 0)
    {
        free(envblock);
        envblock = 0;
        return FALSE;
    }
    close(fd);
    envblock[bs - 1] = '\0';

    ///    environ.purge();

    for (int i = 0; i * (int)sizeof(char *) < bs && ((char **)envblock)[i]; i++)
    {
        int b = ((char **)envblock)[i] - (char *)env_ofs;
        if (b < 0 || b >= bs)
            continue; // outside retrieved memory block
        char *val = strchr(envblock + b, '=');
        if (val)
            *val++ = '\0';
        else
            val = (char *)""; // degenerate: treat as name with
                              // empty value
        make_printable(envblock + b);
        make_printable(val);
        environ.append(NameValue(envblock + b, val)); // ?????
    }
    return TRUE;
}

// Try using /proc/bin/pmap to add file names to the memory map
void Procinfo::read_pmap_maps()
{
    char buf[256];

    sprintf(buf, "/usr/proc/bin/pmap %d 2>/dev/null", pid);

    FILE *pmap = popen(buf, "r");
    if (!pmap)
        return;

    // skip first line
    if (!fgets(buf, sizeof buf, pmap))
    {
        pclose(pmap);
        return;
    }

    int map_num = 0;
    while (fgets(buf, sizeof buf, pmap))
    {
        // Each output line from pmap looks like
        // <address> <size>K <mode> <file>
        // We use <address> and <size> only to match with previously
        // read
        // map info, and only use <file> here.

        unsigned long addr;
        unsigned len;
        int next;
        char *p;

        if (sscanf(buf, "%lx %dK%n", &addr, &len, &next) != 2)
            continue;

        // Correlate this with info already gathered. Assume they are in
        // the
        // same order (ascending by address).
        Mapsinfo *mi;
        int i = map_num;
        while (i < maps.size() && (mi = maps[i])->from != addr)
            i++;
        // Mismatches can happen since changes can have taken place
        // since
        // we read the maps. If so, skip this mapping and try the next.
        if (mi->to != addr + ((unsigned long)len << 10) || i == maps.size())
            continue;
        map_num = i + 1;

        while (buf[next] == ' ')
            next++;
        while (buf[next] && buf[next] != ' ')
            next++;
        while (buf[next] == ' ')
            next++;
        // At this point  we are looking at a file name, or at a
        // suitable
        // designator like [ heap ], [ anon ] or [ stack ]. Use it right
        // away
        // (after peeling off the newline)
        int l = strlen(buf + next);
        if (buf[next + l - 1] == '\n')
            buf[next + l - 1] = '\0';
        mi->filename = buf + next;
    }

    pclose(pmap);
    return;
}

// return TRUE if /proc/XX/map could be read, FALSE otherwise
bool Procinfo::read_maps()
{
    char name[128];
    sprintf(name, "%s/%d/map", procdir, pid);

    FILE *f = fopen(name, "r");
    if (!f)
        return FALSE;

    prmap_t pm;
    while (fread(&pm, sizeof(pm), 1, f) == 1)
    {
        Mapsinfo *mi = new Mapsinfo;
        mi->from = pm.pr_vaddr;
        mi->to = pm.pr_vaddr + pm.pr_size;
        mi->offset = pm.pr_offset;
        mi->perm[0] = pm.pr_mflags & MA_READ ? 'r' : '-';
        mi->perm[1] = pm.pr_mflags & MA_WRITE ? 'w' : '-';
        mi->perm[2] = pm.pr_mflags & MA_EXEC ? 'x' : '-';
        mi->perm[3] = pm.pr_mflags & MA_SHARED ? 's' : 'p';

        if (pm.pr_mapname[0])
        {
            // To find device/inode, stat the file in
            // /proc/#/object:
            char obj[128];
            sprintf(obj, "%s/%d/object/%s", procdir, pid, pm.pr_mapname);
            struct stat sb;
            if (lstat(obj, &sb) < 0)
            {
                delete mi;
                continue;
            }
            mi->major = major(sb.st_dev);
            mi->minor = minor(sb.st_dev);
            mi->inode = sb.st_ino;
            if (strcmp(pm.pr_mapname, "a.out") == 0)
                mi->filename = "(executable)";
        }
        else
        {
            mi->major = mi->minor = mi->inode = 0;
            mi->filename = "(anonymous)";
        }

        maps.append(mi);
    }
    fclose(f);

    // If desired and possible, use /usr/proc/bin/pmap to get the
    // names of the mapped files
    static int myeuid = geteuid();
    if (Qps::use_pmap && (myeuid == 0 || myeuid == euid))
        read_pmap_maps();

    return TRUE;
}

Cat_dir::Cat_dir(const char *heading, const char *explain, const char *dirname,
                 QString Procinfo::*member)
    : Cat_string(heading, explain), dir(dirname), cache(member)
{
}

QString Cat_dir::string(Procinfo *p)
{
    if ((p->*cache).isNull())
    {
        char path[128], buf[512];
        sprintf(path, "/proc/%d/%s", p->pid, dir);

        // Either a Linux 2.0 link in [device]:inode form, or a Solaris
        // link.
        // To resolve it, we just chdir() to it and see where we end up.
        // Perhaps we should change back later?
        if (chdir(path) < 0)
        {
            p->*cache = "-"; // Most likely access denied
        }
        else
        {
            // getcwd() is fairly expensive, but this is cached
            // anyway
            if (!getcwd(buf, sizeof(buf)))
            {
                p->*cache = "(deleted)";
            }
            else
                p->*cache = buf;
        }
    }
    return p->*cache;
}

Cat_state::Cat_state(const char *heading, const char *explain)
    : Category(heading, explain)
{
}

QString Cat_state::string(Procinfo *p)
{
    QString s("   ");
    s[0] = p->state;
    if (p->state == 'Z')
        return s;
    s[1] = (p->resident == 0 && p->state != 'Z') ? 'W' : ' ';
    int ni = p->nice;
    if (!Qps::normalize_nice)
        ni -= NZERO;
    s[2] = (ni > 0) ? 'N' : ((ni < 0) ? '<' : ' ');
    return s;
}

Cat_policy::Cat_policy(const char *heading, const char *explain)
    : Category(heading, explain)
{
}

QString Cat_policy::string(Procinfo *p)
{
    QString s;
    s = "  ";
    s[0] = p->policy_name[0];
    s[1] = p->policy_name[1];
    return s;
}

int Cat_policy::compare(Procinfo *a, Procinfo *b)
{
    int r = b->policy_name[0] - a->policy_name[0];
    return r ? r : b->policy_name[1] - a->policy_name[1];
}

Cat_rtprio::Cat_rtprio(const char *heading, const char *explain)
    : Category(heading, explain)
{
}

QString Cat_rtprio::string(Procinfo *p)
{
    QString s;
    s.setNum(p->get_rtprio());
    return s;
}

int Cat_rtprio::compare(Procinfo *a, Procinfo *b)
{
    return b->get_rtprio() - a->get_rtprio();
}

Cat_time::Cat_time(const char *heading, const char *explain)
    : Category(heading, explain)
{
}

QString Cat_time::string(Procinfo *p)
{
    QString s;
    int ticks = p->utime;
    if (Procview::flag_cumulative)
        ticks += p->cutime;
    int t = ticks / HZ; // seconds
    if (t < 10)
    {
        int hundreds = ticks / (HZ / 100) % 100;
        s.sprintf("%1d.%02ds", t, hundreds);
    }
    else if (t < 100 * 60)
    {
        s.sprintf("%2d:%02d", t / 60, t % 60);
    }
    else if (t < 100 * 3600)
    {
        int h = t / 3600;
        t %= 3600;
        s.sprintf("%2d:%02dh", h, t / 60);
    }
    else
    {
        int d = t / 86400;
        t %= 86400;
        s.sprintf("%dd%dh", d, t / 3600);
    }
    return s;
}

int Cat_time::compare(Procinfo *a, Procinfo *b)
{
    int at = a->utime, bt = b->utime;
    if (Procview::flag_cumulative)
    {
        at += a->cutime;
        bt += b->cutime;
    }
    return bt - at;
}

Cat_tty::Cat_tty(const char *heading, const char *explain)
    : Cat_string(heading, explain)
{
}

QString Cat_tty::string(Procinfo *p) { return Ttystr::name(p->tty); }

Proc::Proc()
{

    categories.insert(F_PID,
                      new Cat_int("PID", "Process ID", 6, &Procinfo::pid));
    categories.insert(
        F_PPID, new Cat_int("PPID", "Parent process ID", 6, &Procinfo::ppid));
    categories.insert(
        F_PGID, new Cat_int("PGID", "Process group ID", 6, &Procinfo::pgrp));
    categories.insert(F_SID,
                      new Cat_int("SID", "Session ID", 6, &Procinfo::session));
    categories.insert(F_TTY, new Cat_tty("TTY", "Controlling tty"));
    categories.insert(
        F_USER, new Cat_user("USER", "Owner (*=suid root, +=suid other user)"));
    categories.insert(F_GROUP,
                      new Cat_group("GROUP", "Group name (*=sgid other)"));
    categories.insert(F_UID,
                      new Cat_int("UID", "Real user ID", 6, &Procinfo::uid));
    categories.insert(
        F_EUID, new Cat_int("EUID", "Effective user ID", 6, &Procinfo::euid));
    categories.insert(F_GID,
                      new Cat_int("GID", "Real group ID", 6, &Procinfo::gid));
    categories.insert(
        F_EGID, new Cat_int("EGID", "Effective group ID", 6, &Procinfo::egid));
    categories.insert(
        F_PRI, new Cat_int("PRI", "Dynamic priority", 4, &Procinfo::priority));
    categories.insert(F_NICE,
                      new Cat_int("NICE",
                                  "Scheduling favour (higher -> less cpu time)",
                                  4, &Procinfo::nice));
    categories.insert(F_PLCY, new Cat_policy("PLCY", "Scheduling policy"));
    categories.insert(
        F_RPRI,
        new Cat_rtprio("RPRI", "Realtime priority (0-99, more is better)"));
    categories.insert(F_NLWP,
                      new Cat_int("NLWP", "Number of threads in process", 5,
                                  &Procinfo::nthreads));
    categories.insert(F_ARCH, new Cat_int("ARCH", "Architecture (address bits)",
                                          2, &Procinfo::addr_bits));
    categories.insert(F_MAJFLT,
                      new Cat_uintl("MAJFLT",
                                    "Number of major faults (disk access)", 8,
                                    &Procinfo::majflt));
    categories.insert(F_MINFLT,
                      new Cat_uintl("MINFLT",
                                    "Number of minor faults (no disk access)",
                                    8, &Procinfo::minflt));

    // Memory
    categories.insert(F_SIZE,
                      new Cat_memory("SIZE",
                                     "Virtual image size of process in Kbytes",
                                     8, &Procinfo::size));
    categories.insert(F_SWAP, new Cat_swap("SWAP", "Kbytes on swap device"));
    categories.insert(
        F_RSS,
        new Cat_memory("RSS", "Resident set size; Kbytes of program in memory",
                       8, &Procinfo::resident));

    categories.insert(F_STAT, new Cat_state("STAT", "State of the process"));
    categories.insert(F_FLAGS, new Cat_hex("FLAGS", "Process flags (hex)", 9,
                                           &Procinfo::flags));
    categories.insert(
        F_WCHAN,
        new Cat_wchan("WCHAN", "Kernel function where process is sleeping"));

    categories.insert(
        F_WCPU,
        new Cat_percent("%WCPU", "Weighted percentage of CPU (30 s average)", 6,
                        &Procinfo::wcpu));
    categories.insert(
        F_CPU,
        new Cat_percent(" %CPU", "Percentage of CPU used since last update", 6,
                        &Procinfo::pcpu));
    categories.insert(
        F_MEM,
        new Cat_percent(" %MEM", "Percentage of memory used (RSS/total mem)", 6,
                        &Procinfo::pmem));
    categories.insert(F_START, new Cat_start("START", "Time process started"));
    categories.insert(F_TIME,
                      new Cat_time("TIME", "Total CPU time used since start"));
    categories.insert(F_CPUNUM,
                      new Cat_int("CPU", "CPU the process is executing on", 3,
                                  &Procinfo::which_cpu));
    categories.insert(F_CMD, new Cat_string("COMMAND",
                                            "Command that started the process",
                                            &Procinfo::command));
    categories.insert(F_CWD, new Cat_dir("CWD", "Current working directory",
                                         "cwd", &Procinfo::cwd));
    categories.insert(F_ROOT, new Cat_dir("ROOT", "Root directory of process",
                                          "root", &Procinfo::root));
    categories.insert(F_CMDLINE,
                      new Cat_cmdline("COMMAND_LINE",
                                      "Command line that started the process"));

    commonPostInit();

    Proc::init_static();
}

// update the process list
// called by void Proc::refresh()
void Proc::read_proc_all()
{

    DIR *d = opendir(procdir);
    struct dirent *e;
    while ((e = readdir(d)) != 0)
    {
        if (e->d_name[0] >= '0' && e->d_name[0] <= '9') // good idea!
        {

            /* if(flag_thread_ok && flag_show_thread)
                            read_pid_tasks(pid);

                    */

            Procinfo *pi;
            int pid;

            pid = atoi(e->d_name);

            pi = procs.value(pid, NULL); // if not found pid then, return Null

            if (pi == NULL) // new process
            {
                pi = new Procinfo(this, pid);
                procs.insert(pid, pi);
            }
            int ret = pi->readproc();
            if (ret > 0)
            {
                pi->generation = current_gen; // this process is alive

                // if(flag_show_thread and flag_thread_ok )
                //	read_pid_tasks(pid);   //for threads

                // add to History /// COMMONZ
                if (ret == 2)
                {
                    Procinfo *p = new Procinfo(*pi); // copy
                    p->clone = true;
                    hprocs->insert(pid, p);
                }
            }
            else
            {
                // already gone.  /proc/PID dead!
                // later remove this process ! not yet
            }
        }
    }
    closedir(d);
}

int Procview::custom_fields[] = {F_PID,  F_TTY,     F_USER, F_NICE, F_NLWP,
                                 F_SIZE, F_RSS,     F_STAT, F_CPU,  F_START,
                                 F_TIME, F_CMDLINE, F_END};

int Procview::basic_fields[] = {F_PID,  F_TTY,     F_USER, F_NICE, F_NLWP,
                                F_SIZE, F_RSS,     F_STAT, F_CPU,  F_START,
                                F_TIME, F_CMDLINE, F_END};
int Procview::jobs_fields[] = {F_PID,  F_PPID, F_PGID, F_SID,     F_TTY,
                               F_STAT, F_UID,  F_TIME, F_CMDLINE, F_END};

int Procview::mem_fields[] = {F_PID,  F_TTY, F_MAJFLT,  F_MINFLT, F_SIZE,
                              F_SWAP, F_RSS, F_CMDLINE, F_END};

void Procview::set_fields()
{
    switch (viewfields)
    {
    case USER:
        set_fields_list(basic_fields);
        break;
    case JOBS:
        set_fields_list(jobs_fields);
        break;
    case MEM:
        set_fields_list(mem_fields);
        break;
    case CUSTOM:
        set_fields_list(custom_fields);
        break;
    }
}

// SOLARIS:
// deduce whether the currently selected fields correspond to a field list
void Procview::deduce_fields()
{
    return;
    /*
            if( viewfields != CUSTOM )
                    return;

            Procview::fieldstates tags[3] = {USER, JOBS, MEM};
            int *lists[3] = {user_fields, jobs_fields, mem_fields};
            for( int i = 0; i < 3; i++ )
            {
                    int *l = lists[i];
                    int j;
                    for( j = 0; l[j] != F_END; j++ )
                            if( findCol(l[j]) < 0 )
                                    break;
                    if( l[j] == F_END && j == cats.size() )
                    {
                            viewfields = tags[i];
                            return;
                    }
            } */
}

void check_system_requirement() {}

bool Procinfo::isThread()
{
    return pid != tgid; // not a thread !
}

Proc::~Proc() {}