/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * 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/types.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <ctype.h>
#include <db.h>
#include <err.h>
#include <fcntl.h>
#include <langinfo.h>
#include <paths.h>
#include <pwd.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <utmpx.h>
#include "finger.h"
#include "pathnames.h"

#define LINE_LEN        80
#define TAB_LEN         8               /* 8 spaces between tabs */

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

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

        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");
                        (void)show_text(pn->dir,
                            _PATH_PUBKEY, "Public key");
                }
        }
}

static void
lprint(PERSON *pn)
{
        struct tm *delta;
        WHERE *w;
        int cpr, len, maxlen;
        struct tm *tp;
        int oddfield;
        char t[80];

        if (d_first < 0)
                d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
        /*
         * 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(tbuf, sizeof(tbuf), "%s: %s, %s",
                    OFFICE_TAG, pn->office, prphone(pn->officephone));
                oddfield = demi_print(tbuf, oddfield);
        } else {
                if (pn->office) {
                        (void)snprintf(tbuf, sizeof(tbuf), "%s: %s",
                            OFFICE_TAG, pn->office);
                        oddfield = demi_print(tbuf, oddfield);
                }
                if (pn->officephone) {
                        (void)snprintf(tbuf, sizeof(tbuf), "%s: %s",
                            OFFICE_PHONE_TAG, prphone(pn->officephone));
                        oddfield = demi_print(tbuf, oddfield);
                }
        }
        if (pn->homephone) {
                (void)snprintf(tbuf, sizeof(tbuf), "%s: %s", "Home Phone",
                    prphone(pn->homephone));
                oddfield = demi_print(tbuf, 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)
                if ((len = strlen(w->tty)) > maxlen)
                        maxlen = len;
        /* find rest of entries for user */
        for (w = pn->whead; w != NULL; w = w->next) {
                if (w->info == LOGGEDIN) {
                        tp = localtime(&w->loginat);
                        strftime(t, sizeof(t),
                            d_first ? "%a %e %b %R (%Z)" : "%a %b %e %R (%Z)",
                            tp);
                        cpr = printf("On since %s on %s", t, w->tty);
                        /*
                         * 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.
                         */
                        delta = gmtime(&w->idletime);
                        if (w->idletime != -1 && (delta->tm_yday ||
                            delta->tm_hour || delta->tm_min)) {
                                cpr += printf("%-*s idle ",
                                    maxlen - (int)strlen(w->tty) + 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 (*w->host) {
                                        putchar(',');
                                        ++cpr;
                                }
                        }
                        if (!w->writable)
                                cpr += printf(" (messages off)");
                } else if (w->loginat == 0) {
                        cpr = printf("Never logged in.");
                } else {
                        tp = localtime(&w->loginat);
                        if (now - w->loginat > 86400 * 365 / 2) {
                                strftime(t, sizeof(t),
                                         d_first ? "%a %e %b %R %Y (%Z)" :
                                                   "%a %b %e %R %Y (%Z)",
                                         tp);
                        } else {
                                strftime(t, sizeof(t),
                                         d_first ? "%a %e %b %R (%Z)" :
                                                   "%a %b %e %R (%Z)",
                                         tp);
                        }
                        cpr = printf("Last login %s on %s", t, w->tty);
                }
                if (*w->host) {
                        if (LINE_LEN < (cpr + 6 + strlen(w->host)))
                                (void)printf("\n   ");
                        (void)printf(" from %s", w->host);
                }
                putchar('\n');
        }
        if (pn->mailrecv == -1)
                printf("No Mail.\n");
        else if (pn->mailrecv > pn->mailread) {
                tp = localtime(&pn->mailrecv);
                strftime(t, sizeof(t),
                         d_first ? "%a %e %b %R %Y (%Z)" :
                                   "%a %b %e %R %Y (%Z)",
                         tp);
                printf("New mail received %s\n", t);
                tp = localtime(&pn->mailread);
                strftime(t, sizeof(t),
                         d_first ? "%a %e %b %R %Y (%Z)" :
                                   "%a %b %e %R %Y (%Z)",
                         tp);
                printf("     Unread since %s\n", t);
        } else {
                tp = localtime(&pn->mailread);
                strftime(t, sizeof(t),
                         d_first ? "%a %e %b %R %Y (%Z)" :
                                   "%a %b %e %R %Y (%Z)",
                         tp);
                printf("Mail last read %s\n", t);
        }
}

static int
demi_print(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);
}

int
show_text(const char *directory, const char *file_name, const char *header)
{
        struct stat sb;
        FILE *fp;
        int ch, cnt;
        char *p, lastc;
        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) {
                        if (*header != '\0')
                                (void)printf("%s: ", header);
                        for (p = tbuf, cnt = nr; cnt--; ++p)
                                if (*p != '\r')
                                        vputc(lastc = *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);
        if (*header != '\0')
                (void)printf("%s:\n", header);
        while ((ch = getc(fp)) != EOF)
                if (ch != '\r')
                        vputc(lastc = ch);
        if (lastc != '\n')
                (void)putchar('\n');
        (void)fclose(fp);
        return(1);
}

static void
vputc(unsigned char ch)
{
        int meta;

        if (!isprint(ch) && !isascii(ch)) {
                (void)putchar('M');
                (void)putchar('-');
                ch = toascii(ch);
                meta = 1;
        } else
                meta = 0;
        if (isprint(ch) || (!meta && (ch == ' ' || ch == '\t' || ch == '\n')))
                (void)putchar(ch);
        else {
                (void)putchar('^');
                (void)putchar(ch == '\177' ? '?' : ch | 0100);
        }
}