1/* Licensed to the Apache Software Foundation (ASF) under one or more
2 * contributor license agreements.  See the NOTICE file distributed with
3 * this work for additional information regarding copyright ownership.
4 * The ASF licenses this file to You under the Apache License, Version 2.0
5 * (the "License"); you may not use this file except in compliance with
6 * the License.  You may obtain a copy of the License at
7 *
8 *     http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "apr_arch_file_io.h"
18#include "apr_file_io.h"
19
20static apr_status_t apr_file_transfer_contents(const char *from_path,
21                                               const char *to_path,
22                                               apr_int32_t flags,
23                                               apr_fileperms_t to_perms,
24                                               apr_pool_t *pool)
25{
26    apr_file_t *s, *d;
27    apr_status_t status;
28    apr_finfo_t finfo;
29    apr_fileperms_t perms;
30
31    /* Open source file. */
32    status = apr_file_open(&s, from_path, APR_FOPEN_READ, APR_OS_DEFAULT, pool);
33    if (status)
34        return status;
35
36    /* Maybe get its permissions. */
37    if (to_perms == APR_FILE_SOURCE_PERMS) {
38        status = apr_file_info_get(&finfo, APR_FINFO_PROT, s);
39        if (status != APR_SUCCESS && status != APR_INCOMPLETE) {
40            apr_file_close(s);  /* toss any error */
41            return status;
42        }
43        perms = finfo.protection;
44        apr_file_perms_set(to_path, perms); /* ignore any failure */
45    }
46    else
47        perms = to_perms;
48
49    /* Open dest file. */
50    status = apr_file_open(&d, to_path, flags, perms, pool);
51    if (status) {
52        apr_file_close(s);  /* toss any error */
53        return status;
54    }
55
56#if BUFSIZ > APR_FILE_DEFAULT_BUFSIZE
57#define COPY_BUFSIZ BUFSIZ
58#else
59#define COPY_BUFSIZ APR_FILE_DEFAULT_BUFSIZE
60#endif
61
62    /* Copy bytes till the cows come home. */
63    while (1) {
64        char buf[COPY_BUFSIZ];
65        apr_size_t bytes_this_time = sizeof(buf);
66        apr_status_t read_err;
67        apr_status_t write_err;
68
69        /* Read 'em. */
70        read_err = apr_file_read(s, buf, &bytes_this_time);
71        if (read_err && !APR_STATUS_IS_EOF(read_err)) {
72            apr_file_close(s);  /* toss any error */
73            apr_file_close(d);  /* toss any error */
74            return read_err;
75        }
76
77        /* Write 'em. */
78        write_err = apr_file_write_full(d, buf, bytes_this_time, NULL);
79        if (write_err) {
80            apr_file_close(s);  /* toss any error */
81            apr_file_close(d);  /* toss any error */
82            return write_err;
83        }
84
85        if (read_err && APR_STATUS_IS_EOF(read_err)) {
86            status = apr_file_close(s);
87            if (status) {
88                apr_file_close(d);  /* toss any error */
89                return status;
90            }
91
92            /* return the results of this close: an error, or success */
93            return apr_file_close(d);
94        }
95    }
96    /* NOTREACHED */
97}
98
99APR_DECLARE(apr_status_t) apr_file_copy(const char *from_path,
100                                        const char *to_path,
101                                        apr_fileperms_t perms,
102                                        apr_pool_t *pool)
103{
104    return apr_file_transfer_contents(from_path, to_path,
105                                      (APR_FOPEN_WRITE | APR_FOPEN_CREATE | APR_FOPEN_TRUNCATE),
106                                      perms,
107                                      pool);
108}
109
110APR_DECLARE(apr_status_t) apr_file_append(const char *from_path,
111                                          const char *to_path,
112                                          apr_fileperms_t perms,
113                                          apr_pool_t *pool)
114{
115    return apr_file_transfer_contents(from_path, to_path,
116                                      (APR_FOPEN_WRITE | APR_FOPEN_CREATE | APR_FOPEN_APPEND),
117                                      perms,
118                                      pool);
119}
120