/* $NetBSD: dns_pw.c,v 1.1.1.2 2012/09/09 16:07:57 christos Exp $ */ /* * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") * Copyright (c) 1996,1999 by Internet Software Consortium. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #if defined(LIBC_SCCS) && !defined(lint) static const char rcsid[] = "Id: dns_pw.c,v 1.3 2005/04/27 04:56:22 sra Exp "; #endif #include "port_before.h" #ifndef WANT_IRS_PW static int __bind_irs_pw_unneeded; #else #include #include #include #include #include #include #include #include #include #include #include "port_after.h" #include "irs_p.h" #include "hesiod.h" #include "dns_p.h" /* Types. */ struct pvt { struct dns_p * dns; struct passwd passwd; char * pwbuf; }; /* Forward. */ static void pw_close(struct irs_pw *); static struct passwd * pw_byname(struct irs_pw *, const char *); static struct passwd * pw_byuid(struct irs_pw *, uid_t); static struct passwd * pw_next(struct irs_pw *); static void pw_rewind(struct irs_pw *); static void pw_minimize(struct irs_pw *); static struct __res_state * pw_res_get(struct irs_pw *); static void pw_res_set(struct irs_pw *, struct __res_state *, void (*)(void *)); static struct passwd * getpwcommon(struct irs_pw *, const char *, const char *); /* Public. */ struct irs_pw * irs_dns_pw(struct irs_acc *this) { struct dns_p *dns = (struct dns_p *)this->private; struct irs_pw *pw; struct pvt *pvt; if (!dns || !dns->hes_ctx) { errno = ENODEV; return (NULL); } if (!(pvt = memget(sizeof *pvt))) { errno = ENOMEM; return (NULL); } memset(pvt, 0, sizeof *pvt); pvt->dns = dns; if (!(pw = memget(sizeof *pw))) { memput(pvt, sizeof *pvt); errno = ENOMEM; return (NULL); } memset(pw, 0x5e, sizeof *pw); pw->private = pvt; pw->close = pw_close; pw->byname = pw_byname; pw->byuid = pw_byuid; pw->next = pw_next; pw->rewind = pw_rewind; pw->minimize = pw_minimize; pw->res_get = pw_res_get; pw->res_set = pw_res_set; return (pw); } /* Methods. */ static void pw_close(struct irs_pw *this) { struct pvt *pvt = (struct pvt *)this->private; if (pvt->pwbuf) free(pvt->pwbuf); memput(pvt, sizeof *pvt); memput(this, sizeof *this); } static struct passwd * pw_byname(struct irs_pw *this, const char *nam) { return (getpwcommon(this, nam, "passwd")); } static struct passwd * pw_byuid(struct irs_pw *this, uid_t uid) { char uidstr[16]; sprintf(uidstr, "%lu", (u_long)uid); return (getpwcommon(this, uidstr, "uid")); } static struct passwd * pw_next(struct irs_pw *this) { UNUSED(this); errno = ENODEV; return (NULL); } static void pw_rewind(struct irs_pw *this) { UNUSED(this); /* NOOP */ } static void pw_minimize(struct irs_pw *this) { UNUSED(this); /* NOOP */ } static struct __res_state * pw_res_get(struct irs_pw *this) { struct pvt *pvt = (struct pvt *)this->private; struct dns_p *dns = pvt->dns; return (__hesiod_res_get(dns->hes_ctx)); } static void pw_res_set(struct irs_pw *this, struct __res_state * res, void (*free_res)(void *)) { struct pvt *pvt = (struct pvt *)this->private; struct dns_p *dns = pvt->dns; __hesiod_res_set(dns->hes_ctx, res, free_res); } /* Private. */ static struct passwd * getpwcommon(struct irs_pw *this, const char *arg, const char *type) { struct pvt *pvt = (struct pvt *)this->private; char **hes_list, *cp; if (!(hes_list = hesiod_resolve(pvt->dns->hes_ctx, arg, type))) return (NULL); if (!*hes_list) { hesiod_free_list(pvt->dns->hes_ctx, hes_list); errno = ENOENT; return (NULL); } memset(&pvt->passwd, 0, sizeof pvt->passwd); if (pvt->pwbuf) free(pvt->pwbuf); pvt->pwbuf = strdup(*hes_list); hesiod_free_list(pvt->dns->hes_ctx, hes_list); cp = pvt->pwbuf; pvt->passwd.pw_name = cp; if (!(cp = strchr(cp, ':'))) goto cleanup; *cp++ = '\0'; pvt->passwd.pw_passwd = cp; if (!(cp = strchr(cp, ':'))) goto cleanup; *cp++ = '\0'; pvt->passwd.pw_uid = atoi(cp); if (!(cp = strchr(cp, ':'))) goto cleanup; *cp++ = '\0'; pvt->passwd.pw_gid = atoi(cp); if (!(cp = strchr(cp, ':'))) goto cleanup; *cp++ = '\0'; pvt->passwd.pw_gecos = cp; if (!(cp = strchr(cp, ':'))) goto cleanup; *cp++ = '\0'; pvt->passwd.pw_dir = cp; if (!(cp = strchr(cp, ':'))) goto cleanup; *cp++ = '\0'; pvt->passwd.pw_shell = cp; return (&pvt->passwd); cleanup: free(pvt->pwbuf); pvt->pwbuf = NULL; return (NULL); } #endif /* WANT_IRS_PW */ /*! \file */