yppasswdd_mkpw.c revision 1.16
1 /* $NetBSD: yppasswdd_mkpw.c,v 1.16 2008/02/24 21:10:02 dholland Exp $ */ 2 3 /* 4 * Copyright (c) 1996 Jason R. Thorpe <thorpej (at) NetBSD.org> 5 * All rights reserved. 6 * 7 * Copyright (c) 1994 Mats O Jansson <moj (at) stacken.kth.se> 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by Mats O Jansson 21 * 4. The name of the author may not be used to endorse or promote products 22 * derived from this software without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 25 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 26 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 28 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #include <sys/cdefs.h> 38 #ifndef lint 39 __RCSID("$NetBSD: yppasswdd_mkpw.c,v 1.16 2008/02/24 21:10:02 dholland Exp $"); 40 #endif /* not lint */ 41 42 #include <sys/types.h> 43 #include <sys/param.h> 44 #include <sys/stat.h> 45 #include <sys/time.h> 46 #include <sys/resource.h> 47 #include <sys/wait.h> 48 49 #include <err.h> 50 #include <errno.h> 51 #include <fcntl.h> 52 #include <stdio.h> 53 #include <pwd.h> 54 #include <signal.h> 55 #include <stdlib.h> 56 #include <string.h> 57 #include <unistd.h> 58 #include <util.h> 59 #include <limits.h> 60 61 #include <rpc/rpc.h> 62 #include <rpc/xdr.h> 63 #include <rpcsvc/yppasswd.h> 64 65 #include "extern.h" 66 67 int handling_request; /* simple mutex */ 68 69 void 70 make_passwd(yppasswd *argp, struct svc_req *rqstp, SVCXPRT *transp) 71 { 72 struct passwd pw; 73 int pfd, tfd; 74 char mpwd[MAXPATHLEN]; 75 char buf[8192]; /* from libutil */ 76 char *p; 77 int lineno; 78 FILE *fpw; 79 80 #define REPLY(val) do { \ 81 int res = (val); \ 82 if (!svc_sendreply(transp, xdr_int, (caddr_t)&res)) \ 83 svcerr_systemerr(transp); \ 84 } while (0) 85 86 #define RETURN(val) do { \ 87 REPLY((val)); \ 88 handling_request = 0; \ 89 return; \ 90 } while (0) 91 92 if (handling_request) { 93 warnx("already handling request; try again later"); 94 REPLY(1); 95 return; 96 } 97 handling_request = 1; 98 99 (void)strlcpy(mpwd, pw_getprefix(), sizeof(mpwd)); 100 (void)strlcat(mpwd, _PATH_MASTERPASSWD, sizeof(mpwd)); 101 fpw = fopen(mpwd, "r"); 102 if (fpw == NULL) { 103 warnx("%s", mpwd); 104 RETURN(1); 105 } 106 for(lineno = 1; ; lineno++) { 107 if (fgets(buf, sizeof(buf), fpw) == NULL) { 108 if (feof(fpw)) 109 warnx("%s: %s not found", mpwd, 110 argp->newpw.pw_name); 111 else 112 warnx("%s: %s", mpwd, strerror(errno)); 113 (void)fclose(fpw); 114 RETURN(1); 115 } 116 if ((p = strchr(buf, '\n')) == NULL) { 117 warnx("line %d too long", lineno); 118 (void)fclose(fpw); 119 RETURN(1); 120 } 121 /* get rid of trailing \n */ 122 *p = '\0'; 123 if (pw_scan(buf, &pw, NULL) == 0) 124 continue; 125 if (strncmp(argp->newpw.pw_name, pw.pw_name, MAXLOGNAME) == 0) 126 break; 127 } 128 fclose(fpw); 129 if (*pw.pw_passwd && 130 strcmp(crypt(argp->oldpass, pw.pw_passwd), pw.pw_passwd) != 0) 131 RETURN(1); 132 133 pw_init(); 134 tfd = pw_lock(0); 135 if (tfd < 0) { 136 warnx("the passwd file is busy."); 137 RETURN(1); 138 } 139 pfd = open(mpwd, O_RDONLY, 0); 140 if (pfd < 0) { 141 pw_abort(); 142 warnx("%s", mpwd); 143 RETURN(1); 144 } 145 146 /* 147 * Get the new password. Reset passwd change time to zero; when 148 * classes are implemented, go and get the "offset" value for this 149 * class and reset the timer. 150 */ 151 if (!nopw) { 152 pw.pw_passwd = argp->newpw.pw_passwd; 153 pw.pw_change = 0; 154 } 155 if (!nogecos) 156 pw.pw_gecos = argp->newpw.pw_gecos; 157 if (!noshell) 158 pw.pw_shell = argp->newpw.pw_shell; 159 160 pw_copy(pfd, tfd, &pw, NULL); 161 162 if (pw_mkdb(pw.pw_name, 0) < 0) { 163 warnx("pw_mkdb failed"); 164 pw_abort(); 165 RETURN(1); 166 } 167 168 /* XXX RESTORE SIGNAL STATE? XXX */ 169 170 /* Notify caller we succeeded. */ 171 REPLY(0); 172 173 /* Update the YP maps. */ 174 if (chdir("/var/yp")) 175 err(EXIT_FAILURE, "/var/yp"); 176 (void) umask(022); 177 (void) system(make_arg); 178 179 handling_request = 0; 180 } 181
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