yppasswdd_mkpw.c revision 1.13
1 /* $NetBSD: yppasswdd_mkpw.c,v 1.13 2006/05/25 01:51:21 christos 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 1.13 2006/05/25 01:51:21 christos 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 <fcntl.h> 51 #include <stdio.h> 52 #include <pwd.h> 53 #include <signal.h> 54 #include <stdlib.h> 55 #include <string.h> 56 #include <unistd.h> 57 #include <util.h> 58 #include <limits.h> 59 60 #include <rpc/rpc.h> 61 #include <rpc/xdr.h> 62 #include <rpcsvc/yppasswd.h> 63 64 #include "extern.h" 65 66 int handling_request; /* simple mutex */ 67 68 void 69 make_passwd(yppasswd *argp, struct svc_req *rqstp, SVCXPRT *transp) 70 { 71 struct passwd pw; 72 int pfd, tfd; 73 char mpwd[MAXPATHLEN]; 74 char buf[8192]; /* from libutil */ 75 char *p; 76 int lineno; 77 FILE *fpw; 78 79 #define REPLY(val) do { \ 80 int res = (val); \ 81 if (!svc_sendreply(transp, xdr_int, (caddr_t)&res)) \ 82 svcerr_systemerr(transp); \ 83 } while (0) 84 85 #define RETURN(val) do { \ 86 REPLY((val)); \ 87 handling_request = 0; \ 88 return; \ 89 } while (0) 90 91 if (handling_request) { 92 warnx("already handling request; try again later"); 93 REPLY(1); 94 return; 95 } 96 handling_request = 1; 97 98 (void)strlcpy(mpwd, pw_getprefix(), sizeof(mpwd)); 99 (void)strlcat(mpwd, _PATH_MASTERPASSWD, sizeof(mpwd)); 100 fpw = fopen(mpwd, "r"); 101 if (fpw == NULL) { 102 warnx("%s", mpwd); 103 RETURN(1); 104 } 105 for(lineno = 1; ; lineno++) { 106 if (fgets(buf, sizeof(buf), fpw) == NULL) { 107 if (feof(fpw)) 108 warnx("%s: %s not found", mpwd, 109 argp->newpw.pw_name); 110 else 111 warnx("%s: %s", mpwd, strerror(errno)); 112 (void)fclose(fp); 113 RETURN(1); 114 } 115 if ((p = strchr(buf, '\n')) == NULL) { 116 warnx("line %d too long", lineno); 117 (void)fclose(fp); 118 RETURN(1); 119 } 120 /* get rid of trailing \n */ 121 *p = '\0'; 122 if (pw_scan(buf, &pw, NULL) == 0) 123 continue; 124 if (strncmp(argp->newpw.pw_name, pw.pw_name, MAXLOGNAME) == 0) 125 break; 126 } 127 fclose(fpw); 128 if (*pw.pw_passwd && 129 strcmp(crypt(argp->oldpass, pw.pw_passwd), pw.pw_passwd) != 0) 130 RETURN(1); 131 132 pw_init(); 133 tfd = pw_lock(0); 134 if (tfd < 0) { 135 warnx("the passwd file is busy."); 136 RETURN(1); 137 } 138 pfd = open(mpwd, O_RDONLY, 0); 139 if (pfd < 0) { 140 pw_abort(); 141 warnx("%s", mpwd); 142 RETURN(1); 143 } 144 145 /* 146 * Get the new password. Reset passwd change time to zero; when 147 * classes are implemented, go and get the "offset" value for this 148 * class and reset the timer. 149 */ 150 if (!nopw) { 151 pw.pw_passwd = argp->newpw.pw_passwd; 152 pw.pw_change = 0; 153 } 154 if (!nogecos) 155 pw.pw_gecos = argp->newpw.pw_gecos; 156 if (!noshell) 157 pw.pw_shell = argp->newpw.pw_shell; 158 159 pw_copy(pfd, tfd, &pw, NULL); 160 161 if (pw_mkdb(pw.pw_name, 0) < 0) { 162 warnx("pw_mkdb failed"); 163 pw_abort(); 164 RETURN(1); 165 } 166 167 /* XXX RESTORE SIGNAL STATE? XXX */ 168 169 /* Notify caller we succeeded. */ 170 REPLY(0); 171 172 /* Update the YP maps. */ 173 if (chdir("/var/yp")) 174 err(EXIT_FAILURE, "/var/yp"); 175 (void) umask(022); 176 (void) system(make_arg); 177 178 handling_request = 0; 179 } 180
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