/*      $NetBSD: lprint.c,v 1.23 2013/01/18 22:10:31 christos Exp $     */

/*
 * Copyright (c) 1989, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Tony Nardo of the Johns Hopkins University/Applied Physics Lab.
 *
 * 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.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)lprint.c    8.3 (Berkeley) 4/28/95";
#else
__RCSID( "$NetBSD: lprint.c,v 1.23 2013/01/18 22:10:31 christos Exp $");
#endif
#endif /* not lint */

#include <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <fcntl.h>
#include <tzfile.h>
#include <db.h>
#include <err.h>
#include <pwd.h>
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <ctype.h>
#include <paths.h>
#include <vis.h>

#include "utmpentry.h"
#include "finger.h"
#include "extern.h"

#define LINE_LEN        80
#define TAB_LEN         8               /* 8 spaces between tabs */
#define _PATH_FORWARD   ".forward"
#define _PATH_PLAN      ".plan"
#define _PATH_PROJECT   ".project"

static int      demi_print(const char *, int);
static void     lprint(PERSON *);
static int      show_text(const char *, const char *, const char *);
static void     vputc(int);

#ifdef __SVR4
#define TIMEZONE(a)     tzname[0]
#else
#define TIMEZONE(a)     (a)->tm_zone
#endif

void
lflag_print(void)
{
        PERSON *pn;
        int sflag, r;
        PERSON *tmp;
        DBT data, key;

        if (db == NULL)
                return;

        for (sflag = R_FIRST;; sflag = R_NEXT) {
                r = (*db->seq)(db, &key, &data, sflag);
                if (r == -1)
                        err(1, "db seq");
                if (r == 1)
                        break;
                memmove(&tmp, data.data, sizeof tmp);
                pn = tmp;
                if (sflag != R_FIRST)
                        putchar('\n');
                lprint(pn);
                if (!pplan) {
                        (void)show_text(pn->dir,
                            _PATH_FORWARD, "Mail forwarded to");
                        (void)show_text(pn->dir, _PATH_PROJECT, "Project");
                        if (!show_text(pn->dir, _PATH_PLAN, "Plan"))
                                (void)printf("No Plan.\n");
                }
        }
}

static size_t
visify(char *buf, size_t blen, const char *str)
{
        int len = strnvisx(buf, blen, str, strlen(str), VIS_WHITE|VIS_CSTYLE);
        if (len == -1) {
                buf[0] = '\0';
                return 0;
        }
        return len;
}

static void
fmt_time(char *buf, size_t blen, time_t ti, time_t n)
{
        struct tm *tp = localtime(&ti);
        if (tp != NULL) {
                char *t = asctime(tp);
                char *tzn = TIMEZONE(tp);
                if (n == (time_t)-1 ||
                    n - ti > SECSPERDAY * DAYSPERNYEAR / 2)
                        snprintf(buf, blen, "%.16s %.4s (%s)", t, t + 20, tzn);
                else
                        snprintf(buf, blen, "%.16s (%s)", t, tzn);
        } else
                snprintf(buf, blen, "[*bad time 0x%llx*]", (long long)ti);
}

/*
 * idle time is tough; if have one, print a comma,
 * then spaces to pad out the device name, then the
 * idle time.  Follow with a comma if a remote login.
 */
static int
print_idle(time_t t, int maxlen, size_t hostlen, size_t ttylen) {

        int cpr;
        struct tm *delta = gmtime(&t);

        if (delta == NULL)
                return printf("Bad idle 0x%llx", (long long)t);

        if (delta->tm_yday == 0 && delta->tm_hour == 0 && delta->tm_min == 0)
                return 0;

        cpr = printf("%-*s idle ", (int)(maxlen - ttylen + 1), ",");
        if (delta->tm_yday > 0) {
                cpr += printf("%d day%s ", delta->tm_yday,
                   delta->tm_yday == 1 ? "" : "s");
        }
        cpr += printf("%d:%02d", delta->tm_hour, delta->tm_min);
        if (hostlen) {
                putchar(',');
                ++cpr;
        }
        return cpr;
}

static void
lprint(PERSON *pn)
{
        WHERE *w;
        int cpr, len, maxlen;
        int oddfield;
        char timebuf[128], ttybuf[64], hostbuf[512];
        size_t ttylen, hostlen;

        cpr = 0;
        /*
         * long format --
         *      login name
         *      real name
         *      home directory
         *      shell
         *      office, office phone, home phone if available
         *      mail status
         */
        (void)printf("Login: %-15s\t\t\tName: %s\nDirectory: %-25s",
            pn->name, pn->realname, pn->dir);
        (void)printf("\tShell: %-s\n", *pn->shell ? pn->shell : _PATH_BSHELL);

        if (gflag)
                goto no_gecos;
        /*
         * try and print office, office phone, and home phone on one line;
         * if that fails, do line filling so it looks nice.
         */
#define OFFICE_TAG              "Office"
#define OFFICE_PHONE_TAG        "Office Phone"
        oddfield = 0;
        if (pn->office && pn->officephone &&
            strlen(pn->office) + strlen(pn->officephone) +
            sizeof(OFFICE_TAG) + 2 <= 5 * TAB_LEN) {
                (void)snprintf(timebuf, sizeof(timebuf), "%s: %s, %s",
                    OFFICE_TAG, pn->office, prphone(pn->officephone));
                oddfield = demi_print(timebuf, oddfield);
        } else {
                if (pn->office) {
                        (void)snprintf(timebuf, sizeof(timebuf), "%s: %s",
                            OFFICE_TAG, pn->office);
                        oddfield = demi_print(timebuf, oddfield);
                }
                if (pn->officephone) {
                        (void)snprintf(timebuf, sizeof(timebuf), "%s: %s",
                            OFFICE_PHONE_TAG, prphone(pn->officephone));
                        oddfield = demi_print(timebuf, oddfield);
                }
        }
        if (pn->homephone) {
                (void)snprintf(timebuf, sizeof(timebuf), "%s: %s", "Home Phone",
                    prphone(pn->homephone));
                oddfield = demi_print(timebuf, oddfield);
        }
        if (oddfield)
                putchar('\n');

no_gecos:
        /*
         * long format con't:
         * if logged in
         *      terminal
         *      idle time
         *      if messages allowed
         *      where logged in from
         * if not logged in
         *      when last logged in
         */
        /* find out longest device name for this user for formatting */
        for (w = pn->whead, maxlen = -1; w != NULL; w = w->next) {
                visify(ttybuf, sizeof(ttybuf), w->tty);
                if ((len = strlen(ttybuf)) > maxlen)
                        maxlen = len;
        }
        /* find rest of entries for user */
        for (w = pn->whead; w != NULL; w = w->next) {
                ttylen = visify(ttybuf, sizeof(ttybuf), w->tty);
                hostlen = visify(hostbuf, sizeof(hostbuf), w->host);
                switch (w->info) {
                case LOGGEDIN:
                        fmt_time(timebuf, sizeof(timebuf), w->loginat, -1);
                        cpr = printf("On since %s on %s", timebuf, ttybuf);

                        cpr += print_idle(w->idletime, maxlen, hostlen,
                            ttylen);

                        if (!w->writable)
                                cpr += printf(" (messages off)");
                        break;
                case LASTLOG:
                        if (w->loginat == 0) {
                                (void)printf("Never logged in.");
                                break;
                        }
                        fmt_time(timebuf, sizeof(timebuf), w->loginat, now);
                        cpr = printf("Last login %s on %s", timebuf, ttybuf);
                        break;
                }
                if (hostlen) {
                        if (LINE_LEN < (cpr + 6 + hostlen))
                                (void)printf("\n   ");
                        (void)printf(" from %s", hostbuf);
                }
                putchar('\n');
        }
        if (pn->mailrecv == -1)
                printf("No Mail.\n");
        else if (pn->mailrecv > pn->mailread) {
                fmt_time(timebuf, sizeof(timebuf), pn->mailrecv, -1);
                printf("New mail received %s\n", timebuf);
                fmt_time(timebuf, sizeof(timebuf), pn->mailread, -1);
                printf("     Unread since %s\n", timebuf);
        } else {
                fmt_time(timebuf, sizeof(timebuf), pn->mailread, -1);
                printf("Mail last read %s\n", timebuf);
        }
}

static int
demi_print(const char *str, int oddfield)
{
        static int lenlast;
        int lenthis, maxlen;

        lenthis = strlen(str);
        if (oddfield) {
                /*
                 * We left off on an odd number of fields.  If we haven't
                 * crossed the midpoint of the screen, and we have room for
                 * the next field, print it on the same line; otherwise,
                 * print it on a new line.
                 *
                 * Note: we insist on having the right hand fields start
                 * no less than 5 tabs out.
                 */
                maxlen = 5 * TAB_LEN;
                if (maxlen < lenlast)
                        maxlen = lenlast;
                if (((((maxlen / TAB_LEN) + 1) * TAB_LEN) +
                    lenthis) <= LINE_LEN) {
                        while(lenlast < (4 * TAB_LEN)) {
                                putchar('\t');
                                lenlast += TAB_LEN;
                        }
                        (void)printf("\t%s\n", str);    /* force one tab */
                } else {
                        (void)printf("\n%s", str);      /* go to next line */
                        oddfield = !oddfield;   /* this'll be undone below */
                }
        } else
                (void)printf("%s", str);
        oddfield = !oddfield;                   /* toggle odd/even marker */
        lenlast = lenthis;
        return(oddfield);
}

static int
show_text(const char *directory, const char *file_name, const char *header)     
{
        struct stat sb;
        FILE *fp;
        int ch, cnt, lastc;
        char *p;
        int fd, nr;

        lastc = 0;
        (void)snprintf(tbuf, sizeof(tbuf), "%s/%s", directory, file_name);
        if ((fd = open(tbuf, O_RDONLY)) < 0 || fstat(fd, &sb) ||
            sb.st_size == 0)
                return(0);

        /* If short enough, and no newlines, show it on a single line.*/
        if (sb.st_size <= (off_t)(LINE_LEN - strlen(header) - 5)) {
                nr = read(fd, tbuf, sizeof(tbuf));
                if (nr <= 0) {
                        (void)close(fd);
                        return(0);
                }
                for (p = tbuf, cnt = nr; cnt--; ++p)
                        if (*p == '\n')
                                break;
                if (cnt <= 1) {
                        (void)printf("%s: ", header);
                        for (p = tbuf, cnt = nr; cnt--; ++p)
                                vputc(lastc = (unsigned char)*p);
                        if (lastc != '\n')
                                (void)putchar('\n');
                        (void)close(fd);
                        return(1);
                }
                else
                        (void)lseek(fd, 0L, SEEK_SET);
        }
        if ((fp = fdopen(fd, "r")) == NULL)
                return(0);
        (void)printf("%s:\n", header);
        while ((ch = getc(fp)) != EOF)
                vputc(lastc = ch);
        if (lastc != '\n')
                (void)putchar('\n');
        (void)fclose(fp);
        return(1);
}

static void
vputc(int ch)
{
        char visout[5], *s2;

        if (eightflag || isprint(ch) || isspace(ch)) {
            (void)putchar(ch);
            return;
        }
        ch = toascii(ch);
        vis(visout, ch, VIS_SAFE|VIS_NOSLASH, 0);
        for (s2 = visout; *s2; s2++)
                (void)putchar(*s2);
}