| /* |
| * Copyright (c) 2009, Sun Microsystems, Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * - Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimer. |
| * - 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. |
| * - Neither the name of Sun Microsystems, Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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. |
| */ |
| |
| /* |
| * netname utility routines |
| * convert from unix names to network names and vice-versa |
| * This module is operating system dependent! |
| * What we define here will work with any unix system that has adopted |
| * the sun NIS domain architecture. |
| */ |
| |
| #include <sys/param.h> |
| #include <rpc/rpc.h> |
| #include "rpc_com.h" |
| #ifdef YP |
| #include <rpcsvc/yp_prot.h> |
| #include <rpcsvc/ypclnt.h> |
| #endif |
| #include <ctype.h> |
| #include <limits.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <unistd.h> |
| |
| #ifndef MAXHOSTNAMELEN |
| #define MAXHOSTNAMELEN 256 |
| #endif |
| #ifndef NGROUPS |
| #define NGROUPS 16 |
| #endif |
| |
| #define TYPE_BIT(type) (sizeof(type) * CHAR_BIT) |
| |
| #define TYPE_SIGNED(type) (((type)-1) < 0) |
| |
| /* |
| ** 302 / 1000 is log10(2.0) rounded up. |
| ** Subtract one for the sign bit if the type is signed; |
| ** add one for integer division truncation; |
| ** add one more for a minus sign if the type is signed. |
| */ |
| #define INT_STRLEN_MAXIMUM(type) \ |
| ((TYPE_BIT(type) - TYPE_SIGNED(type)) * 302 / 1000 + 1 + \ |
| TYPE_SIGNED(type)) |
| |
| static char *OPSYS = "unix"; |
| |
| /* |
| * Figure out my fully qualified network name |
| */ |
| int |
| getnetname(char name[MAXNETNAMELEN + 1]) |
| { |
| uid_t uid; |
| |
| uid = geteuid(); |
| if (uid == 0) |
| return (host2netname(name, (char *)NULL, (char *)NULL)); |
| else |
| return (user2netname(name, uid, (char *)NULL)); |
| } |
| |
| /* |
| * Convert unix cred to network-name |
| */ |
| int |
| user2netname(char netname[MAXNETNAMELEN + 1], const uid_t uid, |
| const char *domain) |
| { |
| char *dfltdom; |
| |
| if (domain == NULL) |
| if (__rpc_get_default_domain(&dfltdom) != 0) { |
| return (0); |
| domain = dfltdom; |
| } |
| if (strlen(domain) + 1 + INT_STRLEN_MAXIMUM(u_long) + 1 + |
| strlen(OPSYS) > MAXNETNAMELEN) { |
| return (0); |
| } |
| (void)sprintf(netname, "%s.%ld@%s", OPSYS, (u_long) uid, domain); |
| return (1); |
| } |
| |
| /* |
| * Convert host to network-name |
| */ |
| int |
| host2netname(char netname[MAXNETNAMELEN + 1], const char *host, |
| const char *domain) |
| { |
| char *dfltdom; |
| char hostname[MAXHOSTNAMELEN + 1]; |
| |
| if (domain == NULL) { |
| if (__rpc_get_default_domain(&dfltdom) != 0) |
| return (0); |
| domain = dfltdom; |
| } |
| if (host == NULL) { |
| (void)gethostname(hostname, sizeof(hostname)); |
| host = hostname; |
| } |
| if (strlen(domain) + 1 + strlen(host) + 1 + strlen(OPSYS) > |
| MAXNETNAMELEN) { |
| return (0); |
| } |
| (void)sprintf(netname, "%s.%s@%s", OPSYS, host, domain); |
| return (1); |
| } |