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