76ca6f88da
The system hostname is now stored in prison0, and the global variable "hostname" has been removed, as has the hostname_mtx mutex. Jails may have their own host information, or they may inherit it from the parent/system. The proper way to read the hostname is via getcredhostname(), which will copy either the hostname associated with the passed cred, or the system hostname if you pass NULL. The system hostname can still be accessed directly (and without locking) at prison0.pr_host, but that should be avoided where possible. The "similar information" referred to is domainname, hostid, and hostuuid, which have also become prison parameters and had their associated global variables removed. Approved by: bz (mentor)
387 lines
9.5 KiB
C
387 lines
9.5 KiB
C
/*-
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* Copyright (c) 1997 Sandro Sigala, Brescia, Italy.
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* Copyright (c) 1997 Chris Shenton
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* Copyright (c) 1995 S ren Schmidt
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer
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* in this position and unchanged.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/module.h>
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#include <sys/malloc.h>
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#include <sys/jail.h>
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#include <sys/kernel.h>
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#include <sys/sysctl.h>
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#include <sys/consio.h>
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#include <sys/fbio.h>
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#include <machine/pc/display.h>
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#include <dev/fb/fbreg.h>
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#include <dev/fb/splashreg.h>
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#include <dev/syscons/syscons.h>
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#define DAEMON_MAX_WIDTH 32
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#define DAEMON_MAX_HEIGHT 19
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static u_char *message;
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static int messagelen;
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static int blanked;
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static int attr_mask;
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#define ATTR(attr) (((attr) & attr_mask) << 8)
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/* Who is the author of this ASCII pic? */
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static u_char *daemon_pic[] = {
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" , ,",
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" /( )`",
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" \\ \\___ / |",
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" /- _ `-/ '",
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" (/\\/ \\ \\ /\\",
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" / / | ` \\",
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" O O ) / |",
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" `-^--'`< '",
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" (_.) _ ) /",
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" `.___/` /",
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" `-----' /",
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"<----. __ / __ \\",
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"<----|====O)))==) \\) /====",
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"<----' `--' `.__,' \\",
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" | |",
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" \\ / /\\",
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" ______( (_ / \\______/",
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" ,' ,-----' |",
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" `--{__________)",
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NULL
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};
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static u_char *daemon_attr[] = {
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" R R",
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" RR RR",
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" R RRRR R R",
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" RR W RRR R",
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" RWWW W R RR",
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" W W W R R",
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" B B W R R",
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" WWWWWWRR R",
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" RRRR R R R",
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" RRRRRRR R",
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" RRRRRRR R",
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"YYYYYY RR R RR R",
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"YYYYYYYYYYRRRRYYR RR RYYYY",
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"YYYYYY RRRR RRRRRR R",
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" R R",
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" R R RR",
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" CCCCCCR RR R RRRRRRRR",
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" CC CCCCCCC C",
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" CCCCCCCCCCCCCCC",
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NULL
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};
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/*
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* Reverse a graphics character, or return unaltered if no mirror;
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* should do alphanumerics too, but I'm too lazy. <cshenton@it.hq.nasa.gov>
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*/
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static u_char
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xflip_symbol(u_char symbol)
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{
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static const u_char lchars[] = "`'(){}[]\\/<>";
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static const u_char rchars[] = "'`)(}{][/\\><";
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int pos;
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for (pos = 0; lchars[pos] != '\0'; pos++)
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if (lchars[pos] == symbol)
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return rchars[pos];
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return symbol;
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}
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static void
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clear_daemon(sc_softc_t *sc, int xpos, int ypos, int dxdir, int xoff, int yoff,
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int xlen, int ylen)
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{
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int y;
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if (xlen <= 0)
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return;
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for (y = yoff; y < ylen; y++) {
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sc_vtb_erase(&sc->cur_scp->scr,
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(ypos + y)*sc->cur_scp->xsize + xpos + xoff,
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xlen - xoff,
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sc->scr_map[0x20], ATTR(FG_LIGHTGREY | BG_BLACK));
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}
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}
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static void
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draw_daemon(sc_softc_t *sc, int xpos, int ypos, int dxdir, int xoff, int yoff,
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int xlen, int ylen)
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{
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int x, y;
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int px;
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int attr;
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for (y = yoff; y < ylen; y++) {
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if (dxdir < 0)
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px = xoff;
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else
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px = DAEMON_MAX_WIDTH - xlen;
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if (px >= strlen(daemon_pic[y]))
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continue;
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for (x = xoff; (x < xlen) && (daemon_pic[y][px] != '\0'); x++, px++) {
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switch (daemon_attr[y][px]) {
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case 'R': attr = FG_LIGHTRED | BG_BLACK; break;
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case 'Y': attr = FG_YELLOW | BG_BLACK; break;
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case 'B': attr = FG_LIGHTBLUE | BG_BLACK; break;
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case 'W': attr = FG_LIGHTGREY | BG_BLACK; break;
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case 'C': attr = FG_CYAN | BG_BLACK; break;
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default: attr = FG_WHITE | BG_BLACK; break;
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}
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if (dxdir < 0) { /* Moving left */
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sc_vtb_putc(&sc->cur_scp->scr,
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(ypos + y)*sc->cur_scp->xsize
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+ xpos + x,
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sc->scr_map[daemon_pic[y][px]],
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ATTR(attr));
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} else { /* Moving right */
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sc_vtb_putc(&sc->cur_scp->scr,
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(ypos + y)*sc->cur_scp->xsize
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+ xpos + DAEMON_MAX_WIDTH
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- px - 1,
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sc->scr_map[xflip_symbol(daemon_pic[y][px])],
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ATTR(attr));
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}
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}
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}
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}
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static void
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clear_string(sc_softc_t *sc, int xpos, int ypos, int xoff, char *s, int len)
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{
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if (len <= 0)
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return;
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sc_vtb_erase(&sc->cur_scp->scr,
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ypos*sc->cur_scp->xsize + xpos + xoff, len - xoff,
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sc->scr_map[0x20], ATTR(FG_LIGHTGREY | BG_BLACK));
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}
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static void
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draw_string(sc_softc_t *sc, int xpos, int ypos, int xoff, u_char *s, int len)
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{
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int x;
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for (x = xoff; x < len; x++)
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sc_vtb_putc(&sc->cur_scp->scr,
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ypos*sc->cur_scp->xsize + xpos + x,
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sc->scr_map[s[x]], ATTR(FG_LIGHTGREEN | BG_BLACK));
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}
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static int
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daemon_saver(video_adapter_t *adp, int blank)
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{
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static int txpos = 10, typos = 10;
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static int txdir = -1, tydir = -1;
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static int dxpos = 0, dypos = 0;
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static int dxdir = 1, dydir = 1;
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static int moved_daemon = 0;
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static int xoff, yoff, toff;
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static int xlen, ylen, tlen;
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sc_softc_t *sc;
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scr_stat *scp;
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int min, max;
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sc = sc_find_softc(adp, NULL);
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if (sc == NULL)
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return EAGAIN;
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scp = sc->cur_scp;
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if (blank) {
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if (adp->va_info.vi_flags & V_INFO_GRAPHICS)
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return EAGAIN;
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if (blanked == 0) {
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/* clear the screen and set the border color */
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sc_vtb_clear(&scp->scr, sc->scr_map[0x20],
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ATTR(FG_LIGHTGREY | BG_BLACK));
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vidd_set_hw_cursor(adp, -1, -1);
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sc_set_border(scp, 0);
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xlen = ylen = tlen = 0;
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}
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if (blanked++ < 2)
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return 0;
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blanked = 1;
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clear_daemon(sc, dxpos, dypos, dxdir, xoff, yoff, xlen, ylen);
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clear_string(sc, txpos, typos, toff, message, tlen);
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if (++moved_daemon) {
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/*
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* The daemon picture may be off the screen, if
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* screen size is chagened while the screen
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* saver is inactive. Make sure the origin of
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* the picture is between min and max.
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*/
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if (scp->xsize <= DAEMON_MAX_WIDTH) {
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/*
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* If the screen width is too narrow, we
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* allow part of the picture go off
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* the screen so that the daemon won't
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* flip too often.
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*/
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min = scp->xsize - DAEMON_MAX_WIDTH - 10;
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max = 10;
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} else {
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min = 0;
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max = scp->xsize - DAEMON_MAX_WIDTH;
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}
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if (dxpos <= min) {
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dxpos = min;
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dxdir = 1;
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} else if (dxpos >= max) {
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dxpos = max;
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dxdir = -1;
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}
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if (scp->ysize <= DAEMON_MAX_HEIGHT) {
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min = scp->ysize - DAEMON_MAX_HEIGHT - 10;
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max = 10;
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} else {
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min = 0;
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max = scp->ysize - DAEMON_MAX_HEIGHT;
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}
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if (dypos <= min) {
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dypos = min;
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dydir = 1;
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} else if (dypos >= max) {
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dypos = max;
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dydir = -1;
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}
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moved_daemon = -1;
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dxpos += dxdir; dypos += dydir;
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/* clip the picture */
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xoff = 0;
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xlen = DAEMON_MAX_WIDTH;
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if (dxpos + xlen <= 0)
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xlen = 0;
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else if (dxpos < 0)
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xoff = -dxpos;
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if (dxpos >= scp->xsize)
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xlen = 0;
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else if (dxpos + xlen > scp->xsize)
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xlen = scp->xsize - dxpos;
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yoff = 0;
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ylen = DAEMON_MAX_HEIGHT;
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if (dypos + ylen <= 0)
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ylen = 0;
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else if (dypos < 0)
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yoff = -dypos;
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if (dypos >= scp->ysize)
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ylen = 0;
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else if (dypos + ylen > scp->ysize)
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ylen = scp->ysize - dypos;
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}
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if (scp->xsize <= messagelen) {
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min = scp->xsize - messagelen - 10;
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max = 10;
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} else {
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min = 0;
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max = scp->xsize - messagelen;
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}
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if (txpos <= min) {
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txpos = min;
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txdir = 1;
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} else if (txpos >= max) {
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txpos = max;
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txdir = -1;
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}
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if (typos <= 0) {
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typos = 0;
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tydir = 1;
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} else if (typos >= scp->ysize - 1) {
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typos = scp->ysize - 1;
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tydir = -1;
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}
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txpos += txdir; typos += tydir;
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toff = 0;
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tlen = messagelen;
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if (txpos + tlen <= 0)
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tlen = 0;
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else if (txpos < 0)
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toff = -txpos;
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if (txpos >= scp->xsize)
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tlen = 0;
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else if (txpos + tlen > scp->xsize)
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tlen = scp->xsize - txpos;
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draw_daemon(sc, dxpos, dypos, dxdir, xoff, yoff, xlen, ylen);
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draw_string(sc, txpos, typos, toff, message, tlen);
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} else
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blanked = 0;
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return 0;
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}
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static int
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daemon_init(video_adapter_t *adp)
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{
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mtx_lock(&prison0.pr_mtx);
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messagelen = strlen(prison0.pr_host) + 3 + strlen(ostype) + 1 +
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strlen(osrelease);
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message = malloc(messagelen + 1, M_DEVBUF, M_WAITOK);
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sprintf(message, "%s - %s %s", prison0.pr_host, ostype, osrelease);
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mtx_unlock(&prison0.pr_mtx);
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blanked = 0;
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switch (adp->va_mode) {
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case M_PC98_80x25:
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case M_PC98_80x30:
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attr_mask = ~FG_UNDERLINE;
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break;
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default:
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attr_mask = ~0;
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break;
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}
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return 0;
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}
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static int
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daemon_term(video_adapter_t *adp)
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{
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free(message, M_DEVBUF);
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return 0;
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}
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static scrn_saver_t daemon_module = {
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"daemon_saver", daemon_init, daemon_term, daemon_saver, NULL,
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};
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SAVER_MODULE(daemon_saver, daemon_module);
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