mirror of https://github.com/python/cpython.git
129 lines
2.8 KiB
C
129 lines
2.8 KiB
C
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/*
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** copy_attrs.h - copy BeFS attributes from one file to another
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**
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** Jan. 11, 1998 Chris Herborth (chrish@qnx.com)
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**
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** This code is donated to the PUBLIC DOMAIN. You can use, abuse, modify,
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** redistribute, steal, or otherwise manipulate this code. No restrictions
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** at all. If you laugh at this code, you can't use it.
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*/
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#include <support/Errors.h>
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#ifndef NO_DEBUG
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#include <assert.h>
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#define ASSERT(cond) assert(cond)
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#else
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#define ASSERT(cond) ((void)0)
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <limits.h>
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#include <string.h>
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#include <errno.h>
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#include <kernel/fs_attr.h>
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#include <fcntl.h>
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#include "copy_attrs.h"
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static const char *rcs_version_id = "$Id$";
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/* ----------------------------------------------------------------------
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** Copy file attributes from src_file to dst_file.
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*/
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status_t copy_attrs( const char *dst_file, const char *src_file )
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{
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int dst_fd, src_fd;
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status_t retval = B_OK;
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DIR *fa_dir = NULL;
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struct dirent *fa_ent = NULL;
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char *buff = NULL;
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struct attr_info fa_info;
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off_t read_bytes, wrote_bytes;
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ASSERT( dst_file != NULL );
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ASSERT( src_file != NULL );
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/* Attempt to open the files.
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*/
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src_fd = open( src_file, O_RDONLY );
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if( src_fd < 0 ) {
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return B_FILE_NOT_FOUND;
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}
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dst_fd = open( dst_file, O_WRONLY );
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if( dst_fd < 0 ) {
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close( src_fd );
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return B_FILE_NOT_FOUND;
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}
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/* Read the attributes, and write them to the destination file.
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*/
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fa_dir = fs_fopen_attr_dir( src_fd );
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if( fa_dir == NULL ) {
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retval = B_IO_ERROR;
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goto close_return;
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}
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fa_ent = fs_read_attr_dir( fa_dir );
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while( fa_ent != NULL ) {
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retval = fs_stat_attr( src_fd, fa_ent->d_name, &fa_info );
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if( retval != B_OK ) {
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/* TODO: Print warning message?
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*/
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goto read_next_attr;
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}
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if( fa_info.size > (off_t)UINT_MAX ) {
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/* TODO: That's too big. Print a warning message? You could
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** copy it in chunks...
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*/
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goto read_next_attr;
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}
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if( fa_info.size > (off_t)0 ) {
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buff = malloc( (size_t)fa_info.size );
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if( buff == NULL ) {
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/* TODO: Can't allocate memory for this attribute. Warning?
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*/
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goto read_next_attr;
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}
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read_bytes = fs_read_attr( src_fd, fa_ent->d_name, fa_info.type,
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0, buff, fa_info.size );
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if( read_bytes != fa_info.size ) {
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/* TODO: Couldn't read entire attribute. Warning?
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*/
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goto free_attr_buff;
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}
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wrote_bytes = fs_write_attr( dst_fd, fa_ent->d_name, fa_info.type,
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0, buff, fa_info.size );
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if( wrote_bytes != fa_info.size ) {
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/* TODO: Couldn't write entire attribute. Warning?
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*/
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;
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}
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free_attr_buff:
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free( buff );
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retval = B_OK;
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}
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/* Read the next entry.
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*/
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read_next_attr:
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fa_ent = fs_read_attr_dir( fa_dir );
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}
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close_return:
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close( dst_fd );
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close( src_fd );
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return retval;
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}
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