cmd/prstat/prutil.c

	prutil.c revision 4944376cd5de3dcd3b4feeaad9cbedbc024d1474
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (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 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include <sys/types.h>
#include <sys/param.h>
#include <sys/resource.h>
#include <sys/priocntl.h>
#include <sys/rtpriocntl.h>
#include <sys/tspriocntl.h>
#include <zone.h>

#include <libintl.h>
#include <limits.h>
#include <wchar.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdio_ext.h>
#include <errno.h>
#include <ctype.h>
#include <poll.h>
#include <project.h>

#include "prfile.h"
#include "prstat.h"
#include "prutil.h"

static char PRG_FMT[] = "%s: ";
static char ERR_FMT[] = ": %s\n";
static char *progname;
static char projbuf[PROJECT_BUFSZ];

#define RLIMIT_NOFILE_MAX   32767

/*PRINTFLIKE1*/
void
Warn(char *format, ...)
{
    int err = errno;
    va_list alist;

    if (progname != NULL)
        (void) fprintf(stderr, PRG_FMT, progname);
    va_start(alist, format);
    (void) vfprintf(stderr, format, alist);
    va_end(alist);
    if (strchr(format, '\n') == NULL)
        (void) fprintf(stderr, gettext(ERR_FMT), strerror(err));
}

/*PRINTFLIKE1*/
void
Die(char *format, ...)
{
    int err = errno;
    va_list alist;

    if (progname != NULL)
        (void) fprintf(stderr, PRG_FMT, progname);
    va_start(alist, format);
    (void) vfprintf(stderr, format, alist);
    va_end(alist);
    if (strchr(format, '\n') == NULL)
        (void) fprintf(stderr, gettext(ERR_FMT), strerror(err));
    exit(1);
}

void
Progname(char *arg0)
{
    char *p = strrchr(arg0, '/');
    if (p == NULL)
        p = arg0;
    else
        p++;
    progname = p;
}

void
Usage()
{
    (void) fprintf(stderr, gettext(
        "Usage:\tprstat [-acHJLmRtTvZ] [-u euidlist] [-U uidlist]\n"
        "\t[-p pidlist] [-P cpulist] [-C psrsetlist] [-h lgrouplist]\n"
        "\t[-j projidlist] [-k taskidlist] [-z zoneidlist]\n"
        "\t[-s key | -S key] [-n nprocs[,nusers]] [-d d|u]\n"
        "\t[interval [counter]]\n"));
    exit(1);
}

int
Atoi(char *p)
{
    int i;
    char *q;
    errno = 0;
    i = (int)strtol(p, &q, 10);
    if (errno != 0 || q == p || i < 0 || *q != '\0')
        Die(gettext("illegal argument -- %s\n"), p);
        /*NOTREACHED*/
    else
        return (i);
    return (0); /* keep gcc happy */
}

void
Format_size(char *str, size_t size, int length)
{
    char tag = 'K';
    if (size >= 10000) {
        size = (size + 512) / 1024;
        tag = 'M';
        if (size >= 10000) {
            size = (size + 512) / 1024;
            tag = 'G';
        }
    }
    (void) snprintf(str, length, "%4d%c", (int)size, tag);
}

void
Format_time(char *str, ulong_t time, int length)
{
    (void) snprintf(str, length, gettext("%3d:%2.2d:%2.2d"), /* hr:mm:ss */
        (int)time/3600, (int)(time % 3600)/60, (int)time % 60);
}

void
Format_pct(char *str, float val, int length)
{
    if (val > (float)100)
        val = 100;
    if (val < 0)
        val = 0;

    if (val < (float)9.95)
        (void) snprintf(str, length, "%1.1f", val);
    else
        (void) snprintf(str, length, "%.0f", val);
}

void
Format_num(char *str, int num, int length)
{
    if (num >= 100000) {
        (void) snprintf(str, length, ".%1dM", num/100000);
    } else {
        if (num >= 1000)
            (void) snprintf(str, length, "%2dK", num/1000);
        else
            (void) snprintf(str, length, "%3d", num);
    }
}

void
Format_state(char *str, char state, processorid_t pr_id, int length)
{
    switch (state) {
    case 'S':
        (void) strncpy(str, "sleep", length);
        break;
    case 'R':
        (void) strncpy(str, "run", length);
        break;
    case 'Z':
        (void) strncpy(str, "zombie", length);
        break;
    case 'T':
        (void) strncpy(str, "stop", length);
        break;
    case 'I':
        (void) strncpy(str, "idle", length);
        break;
    case 'W':
        (void) strncpy(str, "wait", length);
        break;
    case 'O':
        (void) snprintf(str, length, "cpu%-3d", (int)pr_id);
        break;
    default:
        (void) strncpy(str, "?", length);
        break;
    }
}

void *
Realloc(void *ptr, size_t size)
{
    int cnt = 0;
    void    *sav = ptr;

eagain: if ((ptr = realloc(ptr, size)))
        return (ptr);

    if ((++cnt <= 3) && (errno == EAGAIN)) {
        Warn(gettext("realloc() failed, attempt %d"), cnt);
        (void) poll(NULL, 0, 5000); /* wait for 5 seconds */
        ptr = sav;
        goto eagain;
    }
    ptr = sav;
    Die(gettext("not enough memory"));
    /*NOTREACHED*/
    return (NULL);  /* keep gcc happy */
}

void *
Malloc(size_t size)
{
    return (Realloc(NULL, size));
}

void *
Zalloc(size_t size)
{
    return (memset(Realloc(NULL, size), 0, size));
}

int
Setrlimit()
{
    struct rlimit rlim;
    int fd_limit;
    if (getrlimit(RLIMIT_NOFILE, &rlim) == -1)
        Die(gettext("getrlimit failed"));
    fd_limit = rlim.rlim_cur;
    rlim.rlim_max = MIN(rlim.rlim_max, RLIMIT_NOFILE_MAX);
    rlim.rlim_cur = rlim.rlim_max;
    (void) enable_extended_FILE_stdio(-1, -1);
    if (setrlimit(RLIMIT_NOFILE, &rlim) == -1)
        return (fd_limit);
    else
        return (rlim.rlim_cur);
}

void
Priocntl(char *class)
{
    pcinfo_t pcinfo;
    pcparms_t pcparms;
    (void) strcpy(pcinfo.pc_clname, class);
    if (priocntl(0, 0, PC_GETCID, (caddr_t)&pcinfo) == -1) {
        Warn(gettext("cannot get real time class parameters"));
        return;
    }
    pcparms.pc_cid = pcinfo.pc_cid;
    ((rtparms_t *)pcparms.pc_clparms)->rt_pri = 0;
    ((rtparms_t *)pcparms.pc_clparms)->rt_tqsecs = 0;
    ((rtparms_t *)pcparms.pc_clparms)->rt_tqnsecs = RT_NOCHANGE;
    if (priocntl(P_PID, getpid(), PC_SETPARMS, (caddr_t)&pcparms) == -1)
        Warn(gettext("cannot enter the real time class"));
}

void
getprojname(projid_t projid, char *str, int len)
{
    struct project proj;

    if (getprojbyid(projid, &proj, projbuf, PROJECT_BUFSZ) != NULL)
        (void) snprintf(str, len, "%-28s", proj.pj_name);
    else
        (void) snprintf(str, len, "%-6d", (int)projid);
}

void
getzonename(zoneid_t zoneid, char *str, int len)
{
    char zone_name[ZONENAME_MAX];

    if (getzonenamebyid(zoneid, zone_name, sizeof (zone_name)) < 0)
        (void) snprintf(str, len, "%-6d", (int)zoneid);
    else
        (void) snprintf(str, len, "%-28s", zone_name);
}

/*
 * Remove all unprintable characters from process name
 */
void
stripfname(char *buf)
{
    int bytesleft = PRFNSZ;
    wchar_t wchar;
    int length;
    char *cp;

    buf[bytesleft - 1] = '\0';

    for (cp = buf; *cp != '\0'; cp += length) {
        length = mbtowc(&wchar, cp, MB_LEN_MAX);
        if (length <= 0) {
            *cp = '\0';
            break;
        }
        if (!iswprint(wchar)) {
            if (bytesleft <= length) {
                *cp = '\0';
                break;
            }
            (void) memmove(cp, cp + length, bytesleft - length);
            length = 0;
        }
        bytesleft -= length;
    }
}