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From jerenkra...@apache.org
Subject cvs commit: apr/file_io/unix copy.c
Date Fri, 01 Feb 2002 04:43:22 GMT
jerenkrantz    02/01/31 20:43:22

  Added:       file_io/unix copy.c
  Log:
  Add apr_file_copy() and apr_file_append() functions. These are written
  in terms of APR itself, so each platform just uses the one function. A
  future improvement would use CopyFile(Ex) on Windows and sendfile() on
  sendfile-capable systems.
  
  Also add apr_file_attrs_set() for setting file attributes in a logical
  fashion, rather than based on (Posix) permission bits. This is not
  (yet) implemented for Windows, and still needs a way to turn *off* the
  readonly and executable modes.
  
  Submitted by:	Philip Martin <philip@codematters.co.uk>
  
  Revision  Changes    Path
  1.1                  apr/file_io/unix/copy.c
  
  Index: copy.c
  ===================================================================
  /* ====================================================================
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 2002 The Apache Software Foundation.  All rights
   * reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution,
   *    if any, must include the following acknowledgment:
   *       "This product includes software developed by the
   *        Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowledgment may appear in the software itself,
   *    if and wherever such third-party acknowledgments normally appear.
   *
   * 4. The names "Apache" and "Apache Software Foundation" must
   *    not be used to endorse or promote products derived from this
   *    software without prior written permission. For written
   *    permission, please contact apache@apache.org.
   *
   * 5. Products derived from this software may not be called "Apache",
   *    nor may "Apache" appear in their name, without prior written
   *    permission of the Apache Software Foundation.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   */
  
  #include "fileio.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 = NULL, *d = NULL;  /* init to null important for APR */
      apr_status_t status;
      apr_status_t read_err, write_err;
      apr_finfo_t finfo;
      apr_fileperms_t perms;
      char buf[BUFSIZ];
  
      /* Open source file. */
      status = apr_file_open(&s, from_path, APR_READ, APR_OS_DEFAULT, pool);
      if (status)
          return status;
    
      /* Get its size. */
      if (to_perms == APR_FILE_SOURCE_PERMS) {
          status = apr_file_info_get(&finfo, APR_FINFO_PROT, s);
          if (status) {
              apr_file_close(s);  /* toss any error */
              return status;
          }
          perms = finfo.protection;
      }
      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;
      }
    
      /* Copy bytes till the cows come home. */
      read_err = 0;
      while (!APR_STATUS_IS_EOF(read_err)) {
          apr_size_t bytes_this_time = sizeof (buf);
  
          /* 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;
              }
            
              status = apr_file_close (d);
              if (status)
                  return status;
          }
      }
  
    return APR_SUCCESS;
  }
  
  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_WRITE | APR_CREATE | APR_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_WRITE | APR_CREATE | APR_APPEND),
                                       perms,
                                       pool);
  }
  
  
  

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