95 lines
2.1 KiB
C
95 lines
2.1 KiB
C
/*
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* This file is part of Jehanne.
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*
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* Copyright (C) 2015-2016 Giacomo Tesio <giacomo@tesio.it>
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*
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* Jehanne is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 3 of the License.
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*
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* Jehanne is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Jehanne. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <u.h>
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#include <lib9.h>
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#include "console.h"
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int linecontrol;
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int blind;
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int crnl;
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static void
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usage(void)
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{
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fprint(2, "usage: %s [-d dbgfile] [-s srvname] comfile [program [args]]\n", argv0);
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exits("usage");
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}
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static void
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opencom(char *file)
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{
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int fd;
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if((fd = sys_open(file, ORDWR)) <= 0)
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sysfatal("open: %r");
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dup(fd, 0);
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dup(fd, 1);
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sys_close(fd);
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}
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void
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main(int argc, char *argv[])
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{
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int fd, devmnt;
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char *srv = nil;
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blind = 0;
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linecontrol = 1;
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crnl = 1;
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ARGBEGIN{
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case 'd':
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enabledebug(EARGF(usage()));
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break;
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case 's':
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srv = EARGF(usage());
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break;
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default:
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usage();
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}ARGEND;
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if(srv && argc != 1)
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usage();
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if(argc < 2 && srv == nil)
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usage();
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opencom(argv[0]);
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fd = servecons(passthrough, passthrough, &devmnt);
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if(srv){
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debug("%s (%d): posting %d\n", argv0, getpid(), fd);
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post(srv, fd);
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exits(0);
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} else {
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debug("%s %d: mounting cons for %s\n", argv0, getpid(), argv[0]);
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if(sys_mount(fd, -1, "/dev", MBEFORE, "", devmnt) == -1)
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sysfatal("mount (%s): %r", argv[0]);
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debug("%s (%d): all services started, ready to sys_exec(%s)\n", argv0, getpid(), argv[0]);
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/* become the requested program */
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sys_rfork(RFNOTEG|RFREND|RFCFDG);
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fd = sys_open("/dev/cons", OREAD);
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fd = sys_open("/dev/cons", OWRITE);
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if(dup(fd, 2) != 2)
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sysfatal("bad FDs: %r");
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sys_exec(argv[1], (const char**)(argv+1));
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sysfatal("exec %s: %r", argv[1]);
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}
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}
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