1 files changed, 119 insertions, 0 deletions
diff --git a/file_io/unix/copy.c b/file_io/unix/copy.c
new file mode 100644
index 0000000..7f74d30
--- /dev/null
+++ b/file_io/unix/copy.c
@@ -0,0 +1,119 @@
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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_arch_file_io.h"
+#include "apr_file_io.h"
+
+static apr_status_t 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)
+{
+    apr_file_t *s, *d;
+    apr_status_t status;
+    apr_finfo_t finfo;
+    apr_fileperms_t perms;
+
+    /* Open source file. */
+    status = apr_file_open(&s, from_path, APR_FOPEN_READ, APR_OS_DEFAULT, pool);
+    if (status)
+        return status;
+
+    /* Maybe get its permissions. */
+    if (to_perms == APR_FILE_SOURCE_PERMS) {
+        status = apr_file_info_get(&finfo, APR_FINFO_PROT, s);
+        if (status != APR_SUCCESS && status != APR_INCOMPLETE) {
+            apr_file_close(s);  /* toss any error */
+            return status;
+        }
+        perms = finfo.protection;
+        apr_file_perms_set(to_path, perms); /* ignore any failure */
+    }
+    else
+        perms = to_perms;
+
+    /* Open dest file. */
+    status = apr_file_open(&d, to_path, flags, perms, pool);
+    if (status) {
+        apr_file_close(s);  /* toss any error */
+        return status;
+    }
+
+#if BUFSIZ > APR_FILE_DEFAULT_BUFSIZE
+#define COPY_BUFSIZ BUFSIZ
+#else
+#define COPY_BUFSIZ APR_FILE_DEFAULT_BUFSIZE
+#endif
+
+    /* Copy bytes till the cows come home. */
+    while (1) {
+        char buf[COPY_BUFSIZ];
+        apr_size_t bytes_this_time = sizeof(buf);
+        apr_status_t read_err;
+        apr_status_t write_err;
+
+        /* Read 'em. */
+        read_err = apr_file_read(s, buf, &bytes_this_time);
+        if (read_err && !APR_STATUS_IS_EOF(read_err)) {
+            apr_file_close(s);  /* toss any error */
+            apr_file_close(d);  /* toss any error */
+            return read_err;
+        }
+
+        /* Write 'em. */
+        write_err = apr_file_write_full(d, buf, bytes_this_time, NULL);
+        if (write_err) {
+            apr_file_close(s);  /* toss any error */
+            apr_file_close(d);  /* toss any error */
+            return write_err;
+        }
+
+        if (read_err && APR_STATUS_IS_EOF(read_err)) {
+            status = apr_file_close(s);
+            if (status) {
+                apr_file_close(d);  /* toss any error */
+                return status;
+            }
+
+            /* return the results of this close: an error, or success */
+            return apr_file_close(d);
+        }
+    }
+    /* NOTREACHED */
+}
+
+APR_DECLARE(apr_status_t) apr_file_copy(const char *from_path,
+                                        const char *to_path,
+                                        apr_fileperms_t perms,
+                                        apr_pool_t *pool)
+{
+    return apr_file_transfer_contents(from_path, to_path,
+                                      (APR_FOPEN_WRITE | APR_FOPEN_CREATE | APR_FOPEN_TRUNCATE),
+                                      perms,
+                                      pool);
+}
+
+APR_DECLARE(apr_status_t) apr_file_append(const char *from_path,
+                                          const char *to_path,
+                                          apr_fileperms_t perms,
+                                          apr_pool_t *pool)
+{
+    return apr_file_transfer_contents(from_path, to_path,
+                                      (APR_FOPEN_WRITE | APR_FOPEN_CREATE | APR_FOPEN_APPEND),
+                                      perms,
+                                      pool);
+}