1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2009 James Gritton. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/types.h> 34 #include <sys/jail.h> 35 #include <sys/uio.h> 36 37 #include <errno.h> 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <string.h> 41 42 #include "jail.h" 43 44 45 /* 46 * Return the JID corresponding to a jail name. 47 */ 48 int 49 jail_getid(const char *name) 50 { 51 char *ep; 52 int jid; 53 struct iovec jiov[4]; 54 55 jid = strtoul(name, &ep, 10); 56 if (*name && !*ep) { 57 jiov[0].iov_base = __DECONST(char *, "jid"); 58 jiov[0].iov_len = sizeof("jid"); 59 jiov[1].iov_base = &jid; 60 jiov[1].iov_len = sizeof(jid); 61 } else { 62 jiov[0].iov_base = __DECONST(char *, "name"); 63 jiov[0].iov_len = sizeof("name"); 64 jiov[1].iov_len = strlen(name) + 1; 65 jiov[1].iov_base = alloca(jiov[1].iov_len); 66 strcpy(jiov[1].iov_base, name); 67 } 68 jiov[2].iov_base = __DECONST(char *, "errmsg"); 69 jiov[2].iov_len = sizeof("errmsg"); 70 jiov[3].iov_base = jail_errmsg; 71 jiov[3].iov_len = JAIL_ERRMSGLEN; 72 jail_errmsg[0] = 0; 73 jid = jail_get(jiov, 4, 0); 74 if (jid < 0 && !jail_errmsg[0]) 75 snprintf(jail_errmsg, JAIL_ERRMSGLEN, "jail_get: %s", 76 strerror(errno)); 77 return jid; 78 } 79 80 /* 81 * Return the name corresponding to a JID. 82 */ 83 char * 84 jail_getname(int jid) 85 { 86 struct iovec jiov[6]; 87 char *name; 88 char namebuf[MAXHOSTNAMELEN]; 89 90 jiov[0].iov_base = __DECONST(char *, "jid"); 91 jiov[0].iov_len = sizeof("jid"); 92 jiov[1].iov_base = &jid; 93 jiov[1].iov_len = sizeof(jid); 94 jiov[2].iov_base = __DECONST(char *, "name"); 95 jiov[2].iov_len = sizeof("name"); 96 jiov[3].iov_base = namebuf; 97 jiov[3].iov_len = sizeof(namebuf); 98 jiov[4].iov_base = __DECONST(char *, "errmsg"); 99 jiov[4].iov_len = sizeof("errmsg"); 100 jiov[5].iov_base = jail_errmsg; 101 jiov[5].iov_len = JAIL_ERRMSGLEN; 102 jail_errmsg[0] = 0; 103 jid = jail_get(jiov, 6, 0); 104 if (jid < 0) { 105 if (!jail_errmsg[0]) 106 snprintf(jail_errmsg, JAIL_ERRMSGLEN, "jail_get: %s", 107 strerror(errno)); 108 return NULL; 109 } else { 110 name = strdup(namebuf); 111 if (name == NULL) 112 strerror_r(errno, jail_errmsg, JAIL_ERRMSGLEN); 113 } 114 return name; 115 } 116