/* $NetBSD: getid.c,v 1.4 2003/08/07 11:25:35 agc Exp $ */ /* from: NetBSD: getpwent.c,v 1.48 2000/10/03 03:22:26 enami Exp */ /* from: NetBSD: getgrent.c,v 1.41 2002/01/12 23:51:30 lukem Exp */ /* * Copyright (c) 1987, 1988, 1989, 1993, 1994, 1995 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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. * 3. Neither the name of the University 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 REGENTS 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 REGENTS 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. */ /*- * Copyright (c) 2002 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Luke Mewburn of Wasabi Systems. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ #include #include #include #include #include #include #include #include #include #include "extern.h" static struct group * gi_getgrnam(const char *); static struct group * gi_getgrgid(gid_t); static int gi_setgroupent(int); static void gi_endgrent(void); static int grstart(void); static int grscan(int, gid_t, const char *); static int grmatchline(int, gid_t, const char *); static struct passwd * gi_getpwnam(const char *); static struct passwd * gi_getpwuid(uid_t); static int gi_setpassent(int); static void gi_endpwent(void); static int pwstart(void); static int pwscan(int, uid_t, const char *); static int pwmatchline(int, uid_t, const char *); #define MAXGRP 200 #define MAXLINELENGTH 1024 static FILE *_gr_fp; static struct group _gr_group; static int _gr_stayopen; static int _gr_filesdone; static FILE *_pw_fp; static struct passwd _pw_passwd; /* password structure */ static int _pw_stayopen; /* keep fd's open */ static int _pw_filesdone; static char grfile[MAXPATHLEN]; static char pwfile[MAXPATHLEN]; static char *members[MAXGRP]; static char grline[MAXLINELENGTH]; static char pwline[MAXLINELENGTH]; int setup_getid(const char *dir) { if (dir == NULL) return (0); /* close existing databases */ gi_endgrent(); gi_endpwent(); /* build paths to new databases */ snprintf(grfile, sizeof(grfile), "%s/group", dir); snprintf(pwfile, sizeof(pwfile), "%s/master.passwd", dir); /* try to open new databases */ if (!grstart() || !pwstart()) return (0); /* switch pwcache(3) lookup functions */ if (pwcache_groupdb(gi_setgroupent, gi_endgrent, gi_getgrnam, gi_getgrgid) == -1 || pwcache_userdb(gi_setpassent, gi_endpwent, gi_getpwnam, gi_getpwuid) == -1) return (0); return (1); } /* * group lookup functions */ static struct group * gi_getgrnam(const char *name) { int rval; if (!grstart()) return NULL; rval = grscan(1, 0, name); if (!_gr_stayopen) endgrent(); return (rval) ? &_gr_group : NULL; } static struct group * gi_getgrgid(gid_t gid) { int rval; if (!grstart()) return NULL; rval = grscan(1, gid, NULL); if (!_gr_stayopen) endgrent(); return (rval) ? &_gr_group : NULL; } static int gi_setgroupent(int stayopen) { if (!grstart()) return 0; _gr_stayopen = stayopen; return 1; } static void gi_endgrent(void) { _gr_filesdone = 0; if (_gr_fp) { (void)fclose(_gr_fp); _gr_fp = NULL; } } static int grstart(void) { _gr_filesdone = 0; if (_gr_fp) { rewind(_gr_fp); return 1; } if (grfile[0] == '\0') /* sanity check */ return 0; return (_gr_fp = fopen(grfile, "r")) ? 1 : 0; } static int grscan(int search, gid_t gid, const char *name) { if (_gr_filesdone) return 0; for (;;) { if (!fgets(grline, sizeof(grline), _gr_fp)) { if (!search) _gr_filesdone = 1; return 0; } /* skip lines that are too big */ if (!strchr(grline, '\n')) { int ch; while ((ch = getc(_gr_fp)) != '\n' && ch != EOF) ; continue; } if (grmatchline(search, gid, name)) return 1; } /* NOTREACHED */ } static int grmatchline(int search, gid_t gid, const char *name) { unsigned long id; char **m; char *cp, *bp, *ep; /* name may be NULL if search is nonzero */ bp = grline; memset(&_gr_group, 0, sizeof(_gr_group)); _gr_group.gr_name = strsep(&bp, ":\n"); if (search && name && strcmp(_gr_group.gr_name, name)) return 0; _gr_group.gr_passwd = strsep(&bp, ":\n"); if (!(cp = strsep(&bp, ":\n"))) return 0; id = strtoul(cp, &ep, 10); if (id > GID_MAX || *ep != '\0') return 0; _gr_group.gr_gid = (gid_t)id; if (search && name == NULL && _gr_group.gr_gid != gid) return 0; cp = NULL; if (bp == NULL) return 0; for (_gr_group.gr_mem = m = members;; bp++) { if (m == &members[MAXGRP - 1]) break; if (*bp == ',') { if (cp) { *bp = '\0'; *m++ = cp; cp = NULL; } } else if (*bp == '\0' || *bp == '\n' || *bp == ' ') { if (cp) { *bp = '\0'; *m++ = cp; } break; } else if (cp == NULL) cp = bp; } *m = NULL; return 1; } /* * user lookup functions */ static struct passwd * gi_getpwnam(const char *name) { int rval; if (!pwstart()) return NULL; rval = pwscan(1, 0, name); if (!_pw_stayopen) endpwent(); return (rval) ? &_pw_passwd : NULL; } static struct passwd * gi_getpwuid(uid_t uid) { int rval; if (!pwstart()) return NULL; rval = pwscan(1, uid, NULL); if (!_pw_stayopen) endpwent(); return (rval) ? &_pw_passwd : NULL; } static int gi_setpassent(int stayopen) { if (!pwstart()) return 0; _pw_stayopen = stayopen; return 1; } static void gi_endpwent(void) { _pw_filesdone = 0; if (_pw_fp) { (void)fclose(_pw_fp); _pw_fp = NULL; } } static int pwstart(void) { _pw_filesdone = 0; if (_pw_fp) { rewind(_pw_fp); return 1; } if (pwfile[0] == '\0') /* sanity check */ return 0; return (_pw_fp = fopen(pwfile, "r")) ? 1 : 0; } static int pwscan(int search, uid_t uid, const char *name) { if (_pw_filesdone) return 0; for (;;) { if (!fgets(pwline, sizeof(pwline), _pw_fp)) { if (!search) _pw_filesdone = 1; return 0; } /* skip lines that are too big */ if (!strchr(pwline, '\n')) { int ch; while ((ch = getc(_pw_fp)) != '\n' && ch != EOF) ; continue; } if (pwmatchline(search, uid, name)) return 1; } /* NOTREACHED */ } static int pwmatchline(int search, uid_t uid, const char *name) { unsigned long id; char *cp, *bp, *ep; /* name may be NULL if search is nonzero */ bp = pwline; memset(&_pw_passwd, 0, sizeof(_pw_passwd)); _pw_passwd.pw_name = strsep(&bp, ":\n"); /* name */ if (search && name && strcmp(_pw_passwd.pw_name, name)) return 0; _pw_passwd.pw_passwd = strsep(&bp, ":\n"); /* passwd */ if (!(cp = strsep(&bp, ":\n"))) /* uid */ return 0; id = strtoul(cp, &ep, 10); if (id > UID_MAX || *ep != '\0') return 0; _pw_passwd.pw_uid = (uid_t)id; if (search && name == NULL && _pw_passwd.pw_uid != uid) return 0; if (!(cp = strsep(&bp, ":\n"))) /* gid */ return 0; id = strtoul(cp, &ep, 10); if (id > GID_MAX || *ep != '\0') return 0; _pw_passwd.pw_gid = (gid_t)id; if (!(ep = strsep(&bp, ":"))) /* class */ return 0; if (!(ep = strsep(&bp, ":"))) /* change */ return 0; if (!(ep = strsep(&bp, ":"))) /* expire */ return 0; if (!(_pw_passwd.pw_gecos = strsep(&bp, ":\n"))) /* gecos */ return 0; if (!(_pw_passwd.pw_dir = strsep(&bp, ":\n"))) /* directory */ return 0; if (!(_pw_passwd.pw_shell = strsep(&bp, ":\n"))) /* shell */ return 0; if (strchr(bp, ':') != NULL) return 0; return 1; }