OpenSolaris_b135/lib/libproject/common/getprojent.c
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1999-2001 by Sun Microsystems, Inc.
* All rights reserved.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h>
#include <user_attr.h>
#include <pwd.h>
#include <grp.h>
#include <userdefs.h>
#include <project.h>
#include <memory.h>
#include <nss_dbdefs.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/param.h>
#include <sys/mman.h>
#pragma weak setprojent = _setprojent
#pragma weak endprojent = _endprojent
#pragma weak getprojent = _getprojent
#pragma weak fgetprojent = _fgetprojent
#pragma weak getprojbyid = _getprojbyid
#pragma weak getprojbyname = _getprojbyname
#pragma weak getdefaultproj = _getdefaultproj
#pragma weak inproj = _inproj
#pragma weak getprojidbyname = _getprojidbyname
#define DEFAULT_PROJECT 1
#define NORMAL_PROJECT 0
static int ismember(struct project *, const char *, gid_t, int);
static int str2project(const char *, int, void *, char *, int);
static DEFINE_NSS_DB_ROOT(db_root);
static DEFINE_NSS_GETENT(context);
void
_nss_initf_project(nss_db_params_t *p)
{
p->name = NSS_DBNAM_PROJECT;
p->default_config = NSS_DEFCONF_PROJECT;
}
void
_setprojent(void)
{
nss_setent(&db_root, _nss_initf_project, &context);
}
void
_endprojent(void)
{
nss_endent(&db_root, _nss_initf_project, &context);
nss_delete(&db_root);
}
struct project *
_getprojent(struct project *result, void *buffer, size_t buflen)
{
nss_XbyY_args_t arg;
NSS_XbyY_INIT(&arg, result, buffer, buflen, str2project);
(void) nss_getent(&db_root, _nss_initf_project, &context, &arg);
return ((struct project *)NSS_XbyY_FINI(&arg));
}
struct project *
_fgetprojent(FILE *f, struct project *result, void *buffer, size_t buflen)
{
extern void _nss_XbyY_fgets(FILE *, nss_XbyY_args_t *);
nss_XbyY_args_t arg;
NSS_XbyY_INIT(&arg, result, buffer, buflen, str2project);
_nss_XbyY_fgets(f, &arg);
return ((struct project *)NSS_XbyY_FINI(&arg));
}
struct project *
_getprojbyid(projid_t projid, struct project *result,
void *buffer, size_t buflen)
{
nss_XbyY_args_t arg;
NSS_XbyY_INIT(&arg, result, buffer, buflen, str2project);
arg.key.projid = projid;
(void) nss_search(&db_root, _nss_initf_project,
NSS_DBOP_PROJECT_BYID, &arg);
return ((struct project *)NSS_XbyY_FINI(&arg));
}
struct project *
_getprojbyname(const char *name, struct project *result,
void *buffer, size_t buflen)
{
nss_XbyY_args_t arg;
NSS_XbyY_INIT(&arg, result, buffer, buflen, str2project);
arg.key.name = name;
(void) nss_search(&db_root, _nss_initf_project,
NSS_DBOP_PROJECT_BYNAME, &arg);
return ((struct project *)NSS_XbyY_FINI(&arg));
}
/*
* The following routine checks if user specified by the second argument
* is allowed to join the project specified as project structure in first
* argument. Information about user's default group and whether or not
* the project specified in the first argument is user's default project
* (i.e., user_attr, "default", "user.username", or "group.groupname"
* should also be provided. If is_default is set to DEFAULT_PROJECT,
* then this function returns 1 (true), unless specified user explicitly
* excluded with "!user", or "!group" wildcards.
*/
static int
ismember(struct project *proj, const char *user, gid_t gid, int is_default)
{
char grbuf[NSS_BUFLEN_GROUP];
char groupname[MAXGLEN + 1];
int res = is_default;
struct group grp;
int group_ok = 0;
char **u, **g;
char *member;
if (getgrgid_r(gid, &grp, grbuf, NSS_BUFLEN_GROUP) != NULL) {
group_ok = 1;
(void) snprintf(groupname, MAXGLEN, grp.gr_name);
}
/*
* Scan project's user list.
*/
for (u = proj->pj_users; *u; u++) {
member = *u;
if (member[0] == '!' &&
(strcmp(member + 1, user) == 0 ||
strcmp(member + 1, "*") == 0))
return (0);
if (strcmp(member, "*") == 0 || strcmp(member, user) == 0)
res = 1;
}
/*
* Scan project's group list.
*/
for (g = proj->pj_groups; *g; g++) {
member = *g;
/*
* Check if user's default group is included here.
*/
if (group_ok) {
if (member[0] == '!' &&
(strcmp(member + 1, groupname) == 0 ||
strcmp(member + 1, "*") == 0))
return (0);
if (strcmp(member, "*") == 0 ||
strcmp(member, groupname) == 0)
res = 1;
}
/*
* Check if user is a member of one of project's groups.
*/
if (getgrnam_r(member, &grp, grbuf, NSS_BUFLEN_GROUP) != NULL) {
for (u = grp.gr_mem; *u; u++)
if (strcmp(*u, user) == 0)
res = 1;
}
}
return (res);
}
struct project *
_getdefaultproj(const char *user, struct project *result,
void *buffer, size_t buflen)
{
char projname[PROJNAME_MAX + 1];
nss_XbyY_args_t arg;
userattr_t *uattr;
struct passwd p;
struct group g;
char *attrproj;
NSS_XbyY_INIT(&arg, result, buffer, buflen, str2project);
/*
* Need user's default group ID for ismember() calls later
*/
if (getpwnam_r(user, &p, buffer, buflen) == NULL)
return (NULL);
/*
* Check user_attr database first
*/
if ((uattr = getusernam(user)) != NULL) {
if ((attrproj = kva_match(uattr->attr, "project")) != NULL) {
arg.key.name = attrproj;
(void) nss_search(&db_root, _nss_initf_project,
NSS_DBOP_PROJECT_BYNAME, &arg);
if ((result = NSS_XbyY_FINI(&arg)) != NULL) {
free_userattr(uattr);
return (result);
}
}
free_userattr(uattr);
}
/*
* Check user.{username} and group.{groupname} projects
*/
(void) snprintf(projname, PROJNAME_MAX, "user.%s", user);
arg.key.name = projname;
(void) nss_search(&db_root, _nss_initf_project,
NSS_DBOP_PROJECT_BYNAME, &arg);
if ((result = NSS_XbyY_FINI(&arg)) != NULL &&
ismember(result, user, p.pw_gid, DEFAULT_PROJECT))
return (result);
if (getgrgid_r(p.pw_gid, &g, buffer, buflen) != NULL) {
(void) snprintf(projname, PROJNAME_MAX, "group.%s", g.gr_name);
arg.key.name = projname;
(void) nss_search(&db_root, _nss_initf_project,
NSS_DBOP_PROJECT_BYNAME, &arg);
if ((result = NSS_XbyY_FINI(&arg)) != NULL &&
ismember(result, user, p.pw_gid, DEFAULT_PROJECT))
return (result);
}
arg.key.name = "default";
(void) nss_search(&db_root, _nss_initf_project,
NSS_DBOP_PROJECT_BYNAME, &arg);
if ((result = NSS_XbyY_FINI(&arg)) != NULL &&
ismember(result, user, p.pw_gid, DEFAULT_PROJECT))
return (result);
return (NULL);
}
int
_inproj(const char *user, const char *name, void *buffer, size_t buflen)
{
char projname[PROJNAME_MAX + 1];
char grbuf[NSS_BUFLEN_GROUP];
nss_XbyY_args_t arg;
struct project proj;
struct passwd pwd;
userattr_t *uattr;
struct group grp;
char *attrproj;
gid_t gid;
NSS_XbyY_INIT(&arg, &proj, buffer, buflen, str2project);
/*
* 0. Sanity checks.
*/
if (getpwnam_r(user, &pwd, buffer, buflen) == NULL)
return (0); /* user does not exist */
gid = pwd.pw_gid;
if (getprojbyname(name, &proj, buffer, buflen) == NULL)
return (0); /* project does not exist */
/*
* 1. Check for special "default" project.
*/
if (strcmp("default", name) == 0)
return (ismember(&proj, user, gid, DEFAULT_PROJECT));
/*
* 2. Check user_attr database.
*/
if ((uattr = getusernam(user)) != NULL) {
if ((attrproj = kva_match(uattr->attr, "project")) != NULL) {
if (strcmp(attrproj, name) == 0) {
free_userattr(uattr);
return (ismember(&proj, user, gid,
DEFAULT_PROJECT));
}
}
free_userattr(uattr);
}
/*
* 3. Check if this is a special "user.username" project.
*
* User "username" is considered to be a member of project
* "user.username" even if project's user lists do not
* include "username".
*/
(void) snprintf(projname, PROJNAME_MAX, "user.%s", user);
if (strcmp(projname, name) == 0)
return (ismember(&proj, user, gid, DEFAULT_PROJECT));
/*
* 4. Check if this is a special "group.groupname" project.
*
* User "username" with default group "groupname" is considered
* to be a member of project "group.groupname" even if project's
* group list does not include "groupname".
*/
if (getgrgid_r(gid, &grp, grbuf, NSS_LINELEN_GROUP) != NULL) {
(void) snprintf(projname, PROJNAME_MAX,
"group.%s", grp.gr_name);
if (strcmp(projname, name) == 0)
return (ismember(&proj, user, gid, DEFAULT_PROJECT));
}
/*
* 5. Handle all other (non-default) projects.
*/
return (ismember(&proj, user, gid, NORMAL_PROJECT));
}
/*
* Just a quick wrapper around getprojbyname so that the caller does not
* need to allocate the buffer.
*/
projid_t
_getprojidbyname(const char *name)
{
struct project proj;
char buf[PROJECT_BUFSZ];
if (getprojbyname(name, &proj, &buf, PROJECT_BUFSZ) != NULL)
return (proj.pj_projid);
else
return ((projid_t)-1);
}
static char *
gettok(char **nextpp, char sep)
{
char *p = *nextpp;
char *q = p;
char c;
if (p == NULL)
return (NULL);
while ((c = *q) != '\0' && c != sep)
q++;
if (c == '\0')
*nextpp = 0;
else {
*q++ = '\0';
*nextpp = q;
}
return (p);
}
/*
* Return values: 0 = success, 1 = parse error, 2 = erange ...
* The structure pointer passed in is a structure in the caller's space
* wherein the field pointers would be set to areas in the buffer if
* need be. instring and buffer should be separate areas.
*/
static int
str2project(const char *instr, int lenstr, void *ent, char *buffer, int buflen)
{
struct project *project = ent;
char *p, *next;
char *users, *groups;
char **uglist;
char **limit;
if (lenstr + 1 > buflen)
return (NSS_STR_PARSE_ERANGE);
/*
* We copy the input string into the output buffer and
* operate on it in place.
*/
(void) memcpy(buffer, instr, lenstr);
buffer[lenstr] = '\0';
next = buffer;
limit = (char **)ROUND_DOWN(buffer + buflen, sizeof (char *));
/*
* Parsers for passwd and group have always been pretty rigid;
* we wouldn't want to buck a Unix tradition
*/
p = gettok(&next, ':');
if (p == NULL || *p == '\0' || strlen(p) > PROJNAME_MAX) {
/*
* empty or very long project names are not allowed
*/
return (NSS_STR_PARSE_ERANGE);
}
project->pj_name = p;
p = gettok(&next, ':');
if (p == NULL || *p == '\0') {
/*
* projid field shouldn't be empty
*/
return (NSS_STR_PARSE_PARSE);
}
project->pj_projid = (projid_t)strtol(p, NULL, 10);
if (project->pj_projid < 0) {
/*
* projids should be positive number
*/
project->pj_projid = 0;
return (NSS_STR_PARSE_PARSE);
}
p = gettok(&next, ':');
if (p == NULL) {
/*
* comment field can be empty but should not be last field
*/
return (NSS_STR_PARSE_PARSE);
}
project->pj_comment = p;
if ((users = gettok(&next, ':')) == NULL) {
/*
* users field should not be last field
*/
return (NSS_STR_PARSE_PARSE);
}
if ((groups = gettok(&next, ':')) == NULL) {
/*
* groups field should not be last field
*/
return (NSS_STR_PARSE_PARSE);
}
if (next == NULL) {
/*
* attributes field should be last
*/
return (NSS_STR_PARSE_PARSE);
}
project->pj_attr = next;
uglist = (char **)ROUND_UP(buffer + lenstr + 1, sizeof (char *));
*uglist = NULL;
project->pj_users = uglist;
while (uglist < limit) {
p = gettok(&users, ',');
if (p == NULL || *p == '\0') {
*uglist = 0;
break;
}
*uglist++ = p;
}
if (uglist >= limit)
return (NSS_STR_PARSE_ERANGE);
uglist++;
*uglist = NULL;
project->pj_groups = uglist;
while (uglist < limit) {
p = gettok(&groups, ',');
if (p == NULL || *p == '\0') {
*uglist = 0;
break;
}
*uglist++ = p;
}
if (uglist >= limit)
return (NSS_STR_PARSE_ERANGE);
return (NSS_STR_PARSE_SUCCESS);
}