cmd/prstat/prtable.c

	prtable.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <procfs.h>
#include <unistd.h>
#include <stdlib.h>
#include <pwd.h>
#include <ctype.h>
#include <string.h>
#include <libintl.h>
#include <errno.h>
#include <zone.h>
#include <libzonecfg.h>

#include "prstat.h"
#include "prutil.h"
#include "prtable.h"

static plwp_t   *plwp_tbl[PLWP_TBL_SZ];

void
lwpid_init()
{
    (void) memset(&plwp_tbl, 0, sizeof (plwp_t *) * PLWP_TBL_SZ);
}

static int
pwd_getid(char *name)
{
    struct passwd *pwd;

    if ((pwd = getpwnam(name)) == NULL)
        Die(gettext("invalid user name: %s\n"), name);
    return (pwd->pw_uid);
}

void
pwd_getname(int uid, char *name, int length)
{
    struct passwd *pwd;

    if ((pwd = getpwuid(uid)) == NULL) {
        (void) snprintf(name, length, "%d", uid);
    } else {
        (void) snprintf(name, length, "%s", pwd->pw_name);
    }
}

void
add_uid(nametbl_t *tbl, char *name)
{
    name_t *entp;

    if (tbl->n_size == tbl->n_nent) {   /* reallocation */
        if ((tbl->n_size *= 2) == 0)
            tbl->n_size = 4;    /* first time */
        tbl->n_list = Realloc(tbl->n_list, tbl->n_size*sizeof (name_t));
    }

    entp = &tbl->n_list[tbl->n_nent++];

    if (isdigit(name[0])) {
        entp->u_id = Atoi(name);
        pwd_getname(entp->u_id, entp->u_name, LOGNAME_MAX);
    } else {
        entp->u_id = pwd_getid(name);
        (void) snprintf(entp->u_name, LOGNAME_MAX, "%s", name);
    }
}

int
has_uid(nametbl_t *tbl, uid_t uid)
{
    size_t i;

    if (tbl->n_nent) {  /* do linear search if table is not empty */
        for (i = 0; i < tbl->n_nent; i++)
            if (tbl->n_list[i].u_id == uid)
                return (1);
    } else {
        return (1); /* if table is empty return true */
    }

    return (0);     /* nothing has been found */
}

void
add_element(table_t *table, long element)
{
    if (table->t_size == table->t_nent) {
        if ((table->t_size *= 2) == 0)
            table->t_size = 4;
        table->t_list = Realloc(table->t_list,
            table->t_size * sizeof (long));
    }
    table->t_list[table->t_nent++] = element;
}

int
has_element(table_t *table, long element)
{
    size_t i;

    if (table->t_nent) {    /* do linear search if table is not empty */
        for (i = 0; i < table->t_nent; i++)
            if (table->t_list[i] == element)
                return (1);
    } else {        /* if table is empty then */
        return (1); /* pretend that element was found */
    }

    return (0); /* element was not found */
}

int
foreach_element(table_t *table, void *buf, void (*walker)(long, void *))
{
    size_t i;

    if (table->t_nent) {
        for (i = 0; i < table->t_nent; i++)
            walker(table->t_list[i], buf);
    } else {
        return (0);
    }
    return (1);
}

void
add_zone(zonetbl_t *tbl, char *str)
{
    zonename_t *entp;
    zoneid_t id;
    char *cp;

    /*
     * str should be either the name of a configured zone, or the
     * id of a running zone.  If str is a zone name, store the name
     * in the table; otherwise, just store the id.
     */
    if (zone_get_id(str, &id) != 0) {
        Die(gettext("unknown zone -- %s\n"), str);
        /*NOTREACHED*/
    }

    /* was zone specified by name or id? */
    errno = 0;
    if (id == (zoneid_t)strtol(str, &cp, 0) && errno == 0 && cp != str &&
        *cp == '\0') {
        /* found it by id, don't store the name */
        str = NULL;
    }

    if (tbl->z_size == tbl->z_nent) {   /* reallocation */
        if ((tbl->z_size *= 2) == 0)
            tbl->z_size = 4;    /* first time */
        tbl->z_list =
            Realloc(tbl->z_list, tbl->z_size * sizeof (zonename_t));
    }

    entp = &tbl->z_list[tbl->z_nent++];
    if (str)
        (void) strlcpy(entp->z_name, str, ZONENAME_MAX);
    else
        entp->z_name[0] = '\0';
    entp->z_id = id;
}

int
has_zone(zonetbl_t *tbl, zoneid_t id)
{
    long i;

    if (tbl->z_nent) {  /* do linear search if table is not empty */
        for (i = 0; i < tbl->z_nent; i++)
            if (tbl->z_list[i].z_id == id)
                return (1);
        return (0); /* nothing has been found */
    }

    return (1); /* if table is empty return true */
}

/*
 * Lookup ids for each zone name; this is done once each time /proc
 * is scanned to avoid calling getzoneidbyname for each process.
 */
void
convert_zone(zonetbl_t *tbl)
{
    long i;
    zoneid_t id;
    char *name;

    for (i = 0; i < tbl->z_nent; i++) {
        name = tbl->z_list[i].z_name;
        if (name != NULL) {
            if ((id = getzoneidbyname(name)) != -1)
                tbl->z_list[i].z_id = id;
        }
    }
}

void
lwpid_add(lwp_info_t *lwp, pid_t pid, id_t lwpid)
{
    plwp_t *elm = Zalloc(sizeof (plwp_t));
    int hash = pid % PLWP_TBL_SZ;

    elm->l_pid = pid;
    elm->l_lwpid = lwpid;
    elm->l_lwp = lwp;
    elm->l_next = plwp_tbl[hash]; /* add in front of chain */
    plwp_tbl[hash] = elm;
}

void
lwpid_del(pid_t pid, id_t lwpid)
{
    plwp_t *elm, *elm_prev;
    int hash = pid % PLWP_TBL_SZ;

    elm = plwp_tbl[hash];
    elm_prev = NULL;

    while (elm) {
        if ((elm->l_pid == pid) && (elm->l_lwpid == lwpid)) {
            if (!elm_prev)  /* first chain element */
                plwp_tbl[hash] = elm->l_next;
            else
                elm_prev->l_next = elm->l_next;
            free(elm);
            break;
        } else {
            elm_prev = elm;
            elm = elm->l_next;
        }
    }
}

static plwp_t *
lwpid_getptr(pid_t pid, id_t lwpid)
{
    plwp_t *elm = plwp_tbl[pid % PLWP_TBL_SZ];
    while (elm) {
        if ((elm->l_pid == pid) && (elm->l_lwpid == lwpid))
            return (elm);
        else
            elm = elm->l_next;
    }
    return (NULL);
}

lwp_info_t *
lwpid_get(pid_t pid, id_t lwpid)
{
    plwp_t *elm = lwpid_getptr(pid, lwpid);
    if (elm)
        return (elm->l_lwp);
    else
        return (NULL);
}

int
lwpid_pidcheck(pid_t pid)
{
    plwp_t *elm;
    elm = plwp_tbl[pid % PLWP_TBL_SZ];
    while (elm) {
        if (elm->l_pid == pid)
            return (1);
        else
            elm = elm->l_next;
    }
    return (0);
}

int
lwpid_is_active(pid_t pid, id_t lwpid)
{
    plwp_t *elm = lwpid_getptr(pid, lwpid);
    if (elm)
        return (elm->l_active);
    else
        return (0);
}

void
lwpid_set_active(pid_t pid, id_t lwpid)
{
    plwp_t *elm = lwpid_getptr(pid, lwpid);
    if (elm)
        elm->l_active = LWP_ACTIVE;
}