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
apr_file_transfer_contents(const char * from_path,const char * to_path,apr_int32_t flags,apr_fileperms_t to_perms,apr_pool_t * pool)20 static 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
apr_file_copy(const char * from_path,const char * to_path,apr_fileperms_t perms,apr_pool_t * pool)99 APR_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
apr_file_append(const char * from_path,const char * to_path,apr_fileperms_t perms,apr_pool_t * pool)110 APR_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