86654891d0
Use __DECONST (instead of my own attempted re-invention) for the iov parameters to jail_get/set(2). Similarly remove the decost-ish hack from execvp's argv, except the __DECONST is only added at very end. While I'm at it, remove an unused variable and fix a comment typo.
109 lines
3.1 KiB
C
109 lines
3.1 KiB
C
/*-
|
|
* Copyright (c) 2009 James Gritton.
|
|
* 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/types.h>
|
|
#include <sys/jail.h>
|
|
#include <sys/uio.h>
|
|
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "jail.h"
|
|
|
|
|
|
/*
|
|
* Return the JID corresponding to a jail name.
|
|
*/
|
|
int
|
|
jail_getid(const char *name)
|
|
{
|
|
char *ep;
|
|
int jid;
|
|
struct iovec jiov[4];
|
|
|
|
jid = strtoul(name, &ep, 10);
|
|
if (*name && !*ep)
|
|
return jid;
|
|
jiov[0].iov_base = __DECONST(char *, "name");
|
|
jiov[0].iov_len = sizeof("name");
|
|
jiov[1].iov_len = strlen(name) + 1;
|
|
jiov[1].iov_base = alloca(jiov[1].iov_len);
|
|
strcpy(jiov[1].iov_base, name);
|
|
jiov[2].iov_base = __DECONST(char *, "errmsg");
|
|
jiov[2].iov_len = sizeof("errmsg");
|
|
jiov[3].iov_base = jail_errmsg;
|
|
jiov[3].iov_len = JAIL_ERRMSGLEN;
|
|
jail_errmsg[0] = 0;
|
|
jid = jail_get(jiov, 4, 0);
|
|
if (jid < 0 && !jail_errmsg[0])
|
|
snprintf(jail_errmsg, JAIL_ERRMSGLEN, "jail_get: %s",
|
|
strerror(errno));
|
|
return jid;
|
|
}
|
|
|
|
/*
|
|
* Return the name corresponding to a JID.
|
|
*/
|
|
char *
|
|
jail_getname(int jid)
|
|
{
|
|
struct iovec jiov[6];
|
|
char *name;
|
|
char namebuf[MAXHOSTNAMELEN];
|
|
|
|
jiov[0].iov_base = __DECONST(char *, "jid");
|
|
jiov[0].iov_len = sizeof("jid");
|
|
jiov[1].iov_base = &jid;
|
|
jiov[1].iov_len = sizeof(jid);
|
|
jiov[2].iov_base = __DECONST(char *, "name");
|
|
jiov[2].iov_len = sizeof("name");
|
|
jiov[3].iov_base = namebuf;
|
|
jiov[3].iov_len = sizeof(namebuf);
|
|
jiov[4].iov_base = __DECONST(char *, "errmsg");
|
|
jiov[4].iov_len = sizeof("errmsg");
|
|
jiov[5].iov_base = jail_errmsg;
|
|
jiov[5].iov_len = JAIL_ERRMSGLEN;
|
|
jail_errmsg[0] = 0;
|
|
jid = jail_get(jiov, 6, 0);
|
|
if (jid < 0) {
|
|
if (!jail_errmsg[0])
|
|
snprintf(jail_errmsg, JAIL_ERRMSGLEN, "jail_get: %s",
|
|
strerror(errno));
|
|
return NULL;
|
|
} else {
|
|
name = strdup(namebuf);
|
|
if (name == NULL)
|
|
strerror_r(errno, jail_errmsg, JAIL_ERRMSGLEN);
|
|
}
|
|
return name;
|
|
}
|