/* Copyright 2000-2005 The Apache Software Foundation or its licensors, as * applicable. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * *     http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */#include "apr_strings.h"#include "apr_portable.h"#include "apr_user.h"#include "apr_private.h"#ifdef HAVE_PWD_H#include <pwd.h>#endif#if APR_HAVE_SYS_TYPES_H#include <sys/types.h>#endif#if APR_HAVE_UNISTD_H#include <unistd.h> /* for _POSIX_THREAD_SAFE_FUNCTIONS */#endif#define APR_WANT_MEMFUNC#include "apr_want.h"#define PWBUF_SIZE 512static apr_status_t getpwnam_safe(const char *username,                                  struct passwd *pw,                                  char pwbuf[PWBUF_SIZE]){    struct passwd *pwptr;#if APR_HAS_THREADS && defined(_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)    apr_status_t rv;    /* POSIX defines getpwnam_r() et al to return the error number     * rather than set errno, and requires pwptr to be set to NULL if     * the entry is not found, imply that "not found" is not an error     * condition; some implementations do return 0 with pwptr set to     * NULL. */    rv = getpwnam_r(username, pw, pwbuf, PWBUF_SIZE, &pwptr);    if (rv) {        return rv;    }    if (pwptr == NULL) {        return APR_ENOENT;    }#else    /* Some platforms (e.g. FreeBSD 4.x) do not set errno on NULL "not     * found" return values for the non-threadsafe function either. */    errno = 0;    if ((pwptr = getpwnam(username)) != NULL) {        memcpy(pw, pwptr, sizeof *pw);    }    else {        return errno ? errno : APR_ENOENT;    }#endif    return APR_SUCCESS;}APR_DECLARE(apr_status_t) apr_uid_homepath_get(char **dirname,                                               const char *username,                                               apr_pool_t *p){    struct passwd pw;    char pwbuf[PWBUF_SIZE];    apr_status_t rv;    if ((rv = getpwnam_safe(username, &pw, pwbuf)) != APR_SUCCESS)        return rv;#ifdef OS2    /* Need to manually add user name for OS/2 */    *dirname = apr_pstrcat(p, pw.pw_dir, pw.pw_name, NULL);#else    *dirname = apr_pstrdup(p, pw.pw_dir);#endif    return APR_SUCCESS;}APR_DECLARE(apr_status_t) apr_uid_current(apr_uid_t *uid,                                          apr_gid_t *gid,                                          apr_pool_t *p){    *uid = getuid();    *gid = getgid();      return APR_SUCCESS;}APR_DECLARE(apr_status_t) apr_uid_get(apr_uid_t *uid, apr_gid_t *gid,                                      const char *username, apr_pool_t *p){    struct passwd pw;    char pwbuf[PWBUF_SIZE];    apr_status_t rv;            if ((rv = getpwnam_safe(username, &pw, pwbuf)) != APR_SUCCESS)        return rv;    *uid = pw.pw_uid;    *gid = pw.pw_gid;    return APR_SUCCESS;}APR_DECLARE(apr_status_t) apr_uid_name_get(char **username, apr_uid_t userid,                                           apr_pool_t *p){    struct passwd *pw;#if APR_HAS_THREADS && defined(_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)    struct passwd pwd;    char pwbuf[PWBUF_SIZE];    apr_status_t rv;    rv = getpwuid_r(userid, &pwd, pwbuf, sizeof(pwbuf), &pw);    if (rv) {        return rv;    }    if (pw == NULL) {        return APR_ENOENT;    }#else    errno = 0;    if ((pw = getpwuid(userid)) == NULL) {        return errno ? errno : APR_ENOENT;    }#endif    *username = apr_pstrdup(p, pw->pw_name);    return APR_SUCCESS;}