b4fbb76a13
mode by padding out the ``struct device'' to the maximum device size. Bump the ppp version number to indicate the transfer format change. This should make MP over tty and udp devices functional again.
178 lines
4.7 KiB
C
178 lines
4.7 KiB
C
/*-
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* Copyright (c) 1999 Brian Somers <brian@Awfulhak.org>
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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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* 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 AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: exec.c,v 1.4 1999/06/01 19:08:57 brian Exp $
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*/
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <sys/un.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/wait.h>
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#include <sys/uio.h>
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#include <termios.h>
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#include <unistd.h>
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#include "layer.h"
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#include "defs.h"
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#include "mbuf.h"
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#include "log.h"
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#include "sync.h"
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#include "timer.h"
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#include "lqr.h"
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#include "hdlc.h"
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#include "throughput.h"
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#include "fsm.h"
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#include "lcp.h"
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#include "ccp.h"
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#include "link.h"
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#include "async.h"
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#include "slcompress.h"
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#include "iplist.h"
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#include "ipcp.h"
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#include "filter.h"
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#include "descriptor.h"
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#include "physical.h"
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#include "mp.h"
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#ifndef NORADIUS
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#include "radius.h"
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#endif
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#include "chat.h"
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#include "command.h"
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#include "bundle.h"
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#include "prompt.h"
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#include "auth.h"
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#include "chap.h"
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#include "cbcp.h"
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#include "datalink.h"
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#include "exec.h"
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static struct device execdevice = {
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EXEC_DEVICE,
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"exec",
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL
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};
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struct device *
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exec_iov2device(int type, struct physical *p, struct iovec *iov,
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int *niov, int maxiov)
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{
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if (type == EXEC_DEVICE) {
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free(iov[(*niov)++].iov_base);
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physical_SetupStack(p, execdevice.name, PHYSICAL_FORCE_ASYNC);
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return &execdevice;
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}
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return NULL;
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}
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struct device *
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exec_Create(struct physical *p)
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{
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if (p->fd < 0 && *p->name.full == '!') {
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int fids[2];
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if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, fids) < 0)
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log_Printf(LogPHASE, "Unable to create pipe for line exec: %s\n",
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strerror(errno));
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else {
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int stat, argc;
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pid_t pid;
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char *argv[MAXARGS];
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stat = fcntl(fids[0], F_GETFL, 0);
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if (stat > 0) {
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stat |= O_NONBLOCK;
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fcntl(fids[0], F_SETFL, stat);
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}
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switch ((pid = fork())) {
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case -1:
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log_Printf(LogPHASE, "Unable to create pipe for line exec: %s\n",
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strerror(errno));
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break;
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case 0:
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close(fids[0]);
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timer_TermService();
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setuid(geteuid());
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switch (fork()) {
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case 0:
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break;
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case -1:
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log_Printf(LogPHASE, "Unable to fork to drop parent: %s\n",
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strerror(errno));
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default:
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_exit(127);
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}
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fids[1] = fcntl(fids[1], F_DUPFD, 3);
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dup2(fids[1], STDIN_FILENO);
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dup2(fids[1], STDOUT_FILENO);
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dup2(fids[1], STDERR_FILENO);
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log_Printf(LogDEBUG, "Exec'ing ``%s''\n", p->name.base);
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argc = MakeArgs(p->name.base, argv, VECSIZE(argv));
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command_Expand(argv, argc, (char const *const *)argv,
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p->dl->bundle, 0);
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execvp(*argv, argv);
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fprintf(stderr, "execvp failed: %s: %s\r\n", *argv, strerror(errno));
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_exit(127);
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break;
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default:
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close(fids[1]);
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p->fd = fids[0];
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waitpid(pid, &stat, 0);
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log_Printf(LogDEBUG, "Using descriptor %d for child\n", p->fd);
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physical_SetupStack(p, execdevice.name, PHYSICAL_FORCE_ASYNC);
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return &execdevice;
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}
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}
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}
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return NULL;
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}
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