1999-05-08 11:07:56 +00:00
|
|
|
/*-
|
|
|
|
* Copyright (c) 1999 Brian Somers <brian@Awfulhak.org>
|
|
|
|
* All rights reserved.
|
|
|
|
*
|
|
|
|
* 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.
|
|
|
|
*
|
|
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
|
|
|
|
*
|
1999-08-17 14:59:05 +00:00
|
|
|
* $Id: exec.c,v 1.7 1999/08/06 20:04:03 brian Exp $
|
1999-05-08 11:07:56 +00:00
|
|
|
*/
|
|
|
|
|
|
|
|
#include <sys/param.h>
|
|
|
|
#include <sys/socket.h>
|
|
|
|
#include <sys/un.h>
|
|
|
|
|
|
|
|
#include <errno.h>
|
|
|
|
#include <fcntl.h>
|
|
|
|
#include <stdio.h>
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include <string.h>
|
|
|
|
#include <sys/wait.h>
|
1999-06-05 21:36:00 +00:00
|
|
|
#include <sys/uio.h>
|
1999-05-08 11:07:56 +00:00
|
|
|
#include <termios.h>
|
|
|
|
#include <unistd.h>
|
|
|
|
|
|
|
|
#include "layer.h"
|
|
|
|
#include "defs.h"
|
|
|
|
#include "mbuf.h"
|
|
|
|
#include "log.h"
|
|
|
|
#include "timer.h"
|
|
|
|
#include "lqr.h"
|
|
|
|
#include "hdlc.h"
|
|
|
|
#include "throughput.h"
|
|
|
|
#include "fsm.h"
|
|
|
|
#include "lcp.h"
|
|
|
|
#include "ccp.h"
|
|
|
|
#include "link.h"
|
|
|
|
#include "async.h"
|
|
|
|
#include "descriptor.h"
|
|
|
|
#include "physical.h"
|
|
|
|
#include "mp.h"
|
|
|
|
#include "chat.h"
|
|
|
|
#include "command.h"
|
|
|
|
#include "auth.h"
|
|
|
|
#include "chap.h"
|
|
|
|
#include "cbcp.h"
|
|
|
|
#include "datalink.h"
|
|
|
|
#include "exec.h"
|
|
|
|
|
1999-05-12 09:49:12 +00:00
|
|
|
static struct device execdevice = {
|
|
|
|
EXEC_DEVICE,
|
|
|
|
"exec",
|
|
|
|
NULL,
|
|
|
|
NULL,
|
|
|
|
NULL,
|
|
|
|
NULL,
|
|
|
|
NULL,
|
|
|
|
NULL,
|
|
|
|
NULL,
|
|
|
|
NULL,
|
|
|
|
NULL,
|
1999-08-06 20:04:08 +00:00
|
|
|
NULL,
|
1999-05-12 09:49:12 +00:00
|
|
|
NULL
|
|
|
|
};
|
|
|
|
|
|
|
|
struct device *
|
|
|
|
exec_iov2device(int type, struct physical *p, struct iovec *iov,
|
|
|
|
int *niov, int maxiov)
|
1999-05-08 11:07:56 +00:00
|
|
|
{
|
1999-05-24 16:39:17 +00:00
|
|
|
if (type == EXEC_DEVICE) {
|
1999-06-05 21:36:00 +00:00
|
|
|
free(iov[(*niov)++].iov_base);
|
1999-05-24 16:39:17 +00:00
|
|
|
physical_SetupStack(p, execdevice.name, PHYSICAL_FORCE_ASYNC);
|
1999-05-12 09:49:12 +00:00
|
|
|
return &execdevice;
|
1999-05-24 16:39:17 +00:00
|
|
|
}
|
1999-05-12 09:49:12 +00:00
|
|
|
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
struct device *
|
|
|
|
exec_Create(struct physical *p)
|
|
|
|
{
|
|
|
|
if (p->fd < 0 && *p->name.full == '!') {
|
1999-05-08 11:07:56 +00:00
|
|
|
int fids[2];
|
|
|
|
|
|
|
|
if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, fids) < 0)
|
|
|
|
log_Printf(LogPHASE, "Unable to create pipe for line exec: %s\n",
|
|
|
|
strerror(errno));
|
|
|
|
else {
|
1999-08-17 14:59:05 +00:00
|
|
|
int stat, argc, i;
|
1999-06-09 08:47:36 +00:00
|
|
|
pid_t pid, realpid;
|
1999-05-08 11:07:56 +00:00
|
|
|
char *argv[MAXARGS];
|
|
|
|
|
|
|
|
stat = fcntl(fids[0], F_GETFL, 0);
|
|
|
|
if (stat > 0) {
|
|
|
|
stat |= O_NONBLOCK;
|
|
|
|
fcntl(fids[0], F_SETFL, stat);
|
|
|
|
}
|
1999-06-09 08:47:36 +00:00
|
|
|
realpid = getpid();
|
1999-05-08 11:07:56 +00:00
|
|
|
switch ((pid = fork())) {
|
|
|
|
case -1:
|
|
|
|
log_Printf(LogPHASE, "Unable to create pipe for line exec: %s\n",
|
|
|
|
strerror(errno));
|
|
|
|
break;
|
|
|
|
|
|
|
|
case 0:
|
|
|
|
close(fids[0]);
|
|
|
|
timer_TermService();
|
|
|
|
setuid(geteuid());
|
|
|
|
|
|
|
|
switch (fork()) {
|
|
|
|
case 0:
|
|
|
|
break;
|
|
|
|
|
|
|
|
case -1:
|
|
|
|
log_Printf(LogPHASE, "Unable to fork to drop parent: %s\n",
|
|
|
|
strerror(errno));
|
|
|
|
default:
|
|
|
|
_exit(127);
|
|
|
|
}
|
|
|
|
|
1999-08-17 14:59:05 +00:00
|
|
|
log_Printf(LogDEBUG, "Exec'ing ``%s''\n", p->name.base);
|
|
|
|
|
1999-05-08 11:07:56 +00:00
|
|
|
dup2(fids[1], STDIN_FILENO);
|
|
|
|
dup2(fids[1], STDOUT_FILENO);
|
|
|
|
dup2(fids[1], STDERR_FILENO);
|
1999-08-17 14:59:05 +00:00
|
|
|
for (i = getdtablesize(); i > STDERR_FILENO; i--)
|
|
|
|
fcntl(i, F_SETFD, 1);
|
1999-05-08 11:07:56 +00:00
|
|
|
|
|
|
|
argc = MakeArgs(p->name.base, argv, VECSIZE(argv));
|
|
|
|
command_Expand(argv, argc, (char const *const *)argv,
|
1999-06-09 08:47:36 +00:00
|
|
|
p->dl->bundle, 0, realpid);
|
1999-05-08 11:07:56 +00:00
|
|
|
execvp(*argv, argv);
|
1999-08-17 14:59:05 +00:00
|
|
|
printf("execvp failed: %s: %s\r\n", *argv, strerror(errno));
|
1999-05-08 11:07:56 +00:00
|
|
|
_exit(127);
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
close(fids[1]);
|
|
|
|
p->fd = fids[0];
|
|
|
|
waitpid(pid, &stat, 0);
|
|
|
|
log_Printf(LogDEBUG, "Using descriptor %d for child\n", p->fd);
|
1999-05-24 16:39:17 +00:00
|
|
|
physical_SetupStack(p, execdevice.name, PHYSICAL_FORCE_ASYNC);
|
1999-05-12 09:49:12 +00:00
|
|
|
return &execdevice;
|
1999-05-08 11:07:56 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
1999-05-12 09:49:12 +00:00
|
|
|
return NULL;
|
1999-05-08 11:07:56 +00:00
|
|
|
}
|