You have
globus_byte_t **stat_buffer;
globus_size_t *stat_buffer_length;
which should be
globus_byte_t *stat_buffer;
globus_size_t stat_buffer_length;
and you then pass the address of those var to globus_ftp_client_stat
using &:
globus_ftp_client_stat(&handle, url, &attr, &stat_buffer,
&stat_buffer_length, get_file_done_cb, 0);
You don't allocate the memory for stat_buffer -- the client library will
do that and then fill it with a string similar to 'ls -l' output. You
must free that memory when you are done with it.
For more structured attributes, try globus_ftp_client_mlst instead of
_stat. It is used the same way.
Mike
On 4/12/2012 4:00 AM, shobhit puri wrote:
Hello
I hope you are doing well. I have been trying to get the attributes of a
remote file using the Globus GridFtp Client API. I am using the
globus_ftp_client_stat function to get the listing. However the function
id returning success but I am getting a NULL when I am seeing in the
buffer. I think the problem is somewhat allocating space to the
pointers. I am a novice in the area so any kind of help would be really
appreciable.
Here's the part of my code:
int grid_ftp_getattributes(char *url){
globus_byte_t **stat_buffer;
globus_size_t *stat_buffer_length;globus_ftp_client_operationattr_t
attr;
char *data;
int result = 0;
stat_buffer = (globus_byte_t **) malloc(sizeof(struct stat));
stat_buffer_length = (globus_size_t *) malloc(8*sizeof(globus_size_t));
if (globus_module_activate(GLOBUS_FTP_CLIENT_MODULE) !=
GLOBUS_SUCCESS) {
globus_libc_printf("\n\t\t ERROR : Failed to activate the FTP
Client module\n");
return 1;
}
if (globus_ftp_client_operationattr_init(&attr) != GLOBUS_SUCCESS) {
globus_libc_printf("\n\t\t ERROR : Failed to initialize
operationattr\n");
return 1;
}
globus_ftp_client_operationattr_set_authorization(&attr,GSS_C_NO_CREDENTIAL,
NULL,NULL,NULL,"CREDINTIALS HERE");
globus_ftp_client_handleattr_t hattr;
globus_ftp_client_handleattr_init(&hattr);
if (globus_ftp_client_handle_init(&handle,&hattr) != GLOBUS_SUCCESS) {
globus_libc_printf("\n\t\t ERROR : Failed to initialize the
handle\n");
return 1;
}
done=GLOBUS_FALSE;
result = globus_ftp_client_stat(&handle, url, &attr, stat_buffer,
stat_buffer_length, get_file_done_cb, 0);
if (result != GLOBUS_SUCCESS) {
printf("\nError in result\n");
globus_object_t * err;
err = globus_error_get(result);
globus_libc_printf( "\n ERROR : %s",
globus_object_printable_to_string(err)); //??
done = GLOBUS_TRUE;
}
data =(char *) *stat_buffer;
printf("The values in actual buffer are %s \n", data);
free(stat_buffer);
free(stat_buffer_length);
/* Block until the mutual exclusion lock, mutex, is acquired */
globus_mutex_lock(&lock);
while (!done) {
/* Atomically release mutex and wait on cond. When the
function returns, mutex has been reacquired*/
globus_cond_wait(&cond, &lock);
}
/* Unlock the mutual exclusion lock, mutex, enabling
another thread to acquire the mutex */
globus_mutex_unlock(&lock);
globus_ftp_client_handle_destroy(&handle);
globus_module_deactivate(GLOBUS_FTP_CLIENT_MODULE);
return 0;
}
I don't know where is the problem exactly. Actually my aim is to obtain
the attributes of remote file and copy then to a local "stat" structure.
If you be really helpful if you can throw some light on the same. I have
been trying for 2 days and no much help. Waiting for the reply.
Thanks in advance
--
Shobhit Puri
Fourth Year Undergraduate Student
Department of Information Technology
Indian Institute of Information Technology, Allahabad, India
Currently Intern at Karlsruhe Institute of Technology, Karlsruhe, Germany
Email: [email protected] <mailto:[email protected]>,
[email protected] <mailto:[email protected]>
Phone: +49-15736153084 <tel:%2B49-15736153084>, +91-9457011377
<tel:%2B91-9457011377>
