/*      $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);
}

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