Coverage Report

Created: 2023-03-26 06:28

/src/httpd/srclib/apr/user/unix/userinfo.c
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/* Licensed to the Apache Software Foundation (ASF) under one or more
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 * contributor license agreements.  See the NOTICE file distributed with
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 * this work for additional information regarding copyright ownership.
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 * The ASF licenses this file to You under the Apache License, Version 2.0
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 * (the "License"); you may not use this file except in compliance with
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 * the License.  You may obtain a copy of the License at
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 *
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 *     http://www.apache.org/licenses/LICENSE-2.0
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 *
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 * Unless required by applicable law or agreed to in writing, software
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 * distributed under the License is distributed on an "AS IS" BASIS,
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 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * See the License for the specific language governing permissions and
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 * limitations under the License.
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 */
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#include "apr_strings.h"
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#include "apr_portable.h"
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#include "apr_user.h"
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#include "apr_private.h"
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#ifdef HAVE_PWD_H
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#include <pwd.h>
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#endif
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#if APR_HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#if APR_HAVE_UNISTD_H
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#include <unistd.h> /* for _POSIX_THREAD_SAFE_FUNCTIONS */
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#endif
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#define APR_WANT_MEMFUNC
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#include "apr_want.h"
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#define PWBUF_SIZE 2048
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static apr_status_t getpwnam_safe(const char *username,
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                                  struct passwd *pw,
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                                  char pwbuf[PWBUF_SIZE])
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0
{
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    struct passwd *pwptr;
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#if APR_HAS_THREADS && defined(_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
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    apr_status_t rv;
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    /* POSIX defines getpwnam_r() et al to return the error number
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     * rather than set errno, and requires pwptr to be set to NULL if
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     * the entry is not found, imply that "not found" is not an error
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     * condition; some implementations do return 0 with pwptr set to
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     * NULL. */
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    rv = getpwnam_r(username, pw, pwbuf, PWBUF_SIZE, &pwptr);
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    if (rv) {
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        return rv;
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0
    }
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    if (pwptr == NULL) {
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        return APR_ENOENT;
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    }
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#else
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    /* Some platforms (e.g. FreeBSD 4.x) do not set errno on NULL "not
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     * found" return values for the non-threadsafe function either. */
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    errno = 0;
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    if ((pwptr = getpwnam(username)) != NULL) {
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        memcpy(pw, pwptr, sizeof *pw);
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    }
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    else {
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        return errno ? errno : APR_ENOENT;
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    }
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#endif
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    return APR_SUCCESS;
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}
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APR_DECLARE(apr_status_t) apr_uid_homepath_get(char **dirname,
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                                               const char *username,
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                                               apr_pool_t *p)
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{
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    struct passwd pw;
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    char pwbuf[PWBUF_SIZE];
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    apr_status_t rv;
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    if ((rv = getpwnam_safe(username, &pw, pwbuf)) != APR_SUCCESS)
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        return rv;
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#ifdef OS2
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    /* Need to manually add user name for OS/2 */
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    *dirname = apr_pstrcat(p, pw.pw_dir, pw.pw_name, NULL);
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#else
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    *dirname = apr_pstrdup(p, pw.pw_dir);
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#endif
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    return APR_SUCCESS;
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}
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APR_DECLARE(apr_status_t) apr_uid_current(apr_uid_t *uid,
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                                          apr_gid_t *gid,
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                                          apr_pool_t *p)
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{
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    *uid = getuid();
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    *gid = getgid();
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    return APR_SUCCESS;
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}
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APR_DECLARE(apr_status_t) apr_uid_get(apr_uid_t *uid, apr_gid_t *gid,
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                                      const char *username, apr_pool_t *p)
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{
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    struct passwd pw;
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    char pwbuf[PWBUF_SIZE];
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    apr_status_t rv;
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    if ((rv = getpwnam_safe(username, &pw, pwbuf)) != APR_SUCCESS)
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        return rv;
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    *uid = pw.pw_uid;
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    *gid = pw.pw_gid;
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    return APR_SUCCESS;
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}
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APR_DECLARE(apr_status_t) apr_uid_name_get(char **username, apr_uid_t userid,
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                                           apr_pool_t *p)
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{
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    struct passwd *pw;
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#if APR_HAS_THREADS && defined(_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)
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    struct passwd pwd;
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    char pwbuf[PWBUF_SIZE];
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    apr_status_t rv;
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    rv = getpwuid_r(userid, &pwd, pwbuf, sizeof(pwbuf), &pw);
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    if (rv) {
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        return rv;
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    }
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    if (pw == NULL) {
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        return APR_ENOENT;
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    }
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#else
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    errno = 0;
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    if ((pw = getpwuid(userid)) == NULL) {
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        return errno ? errno : APR_ENOENT;
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    }
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#endif
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    *username = apr_pstrdup(p, pw->pw_name);
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    return APR_SUCCESS;
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}