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/*
* Copyright (C) 2014 Marin Hannache <ipxe@mareo.fr>.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <libgen.h>
#include <ipxe/nfs_uri.h>
/** @file
*
* Network File System protocol URI handling functions
*
*/
int nfs_uri_init ( struct nfs_uri *nfs_uri, const struct uri *uri ) {
if ( ! ( nfs_uri->mountpoint = strdup ( uri->path ) ) )
return -ENOMEM;
nfs_uri->filename = basename ( nfs_uri->mountpoint );
if ( strchr ( uri->path, '/' ) != NULL )
nfs_uri->mountpoint = dirname ( nfs_uri->mountpoint );
if ( nfs_uri->filename[0] == '\0' ) {
free ( nfs_uri->mountpoint );
return -EINVAL;
}
if ( ! ( nfs_uri->path = strdup ( nfs_uri->filename ) ) ) {
free ( nfs_uri->mountpoint );
return -ENOMEM;
}
nfs_uri->lookup_pos = nfs_uri->path;
return 0;
}
char *nfs_uri_mountpoint ( const struct nfs_uri *uri ) {
if ( uri->mountpoint + 1 == uri->filename ||
uri->mountpoint == uri->filename )
return "/";
return uri->mountpoint;
}
int nfs_uri_next_mountpoint ( struct nfs_uri *uri ) {
char *sep;
if ( uri->mountpoint + 1 == uri->filename ||
uri->mountpoint == uri->filename )
return -ENOENT;
sep = strrchr ( uri->mountpoint, '/' );
uri->filename[-1] = '/';
uri->filename = sep + 1;
*sep = '\0';
free ( uri->path );
if ( ! ( uri->path = strdup ( uri->filename ) ) ) {
uri->path = NULL;
return -ENOMEM;
}
uri->lookup_pos = uri->path;
return 0;
}
int nfs_uri_symlink ( struct nfs_uri *uri, const char *symlink ) {
size_t len;
char *new_path;
if ( ! uri->path )
return -EINVAL;
if ( *symlink == '/' )
{
if ( strncmp ( symlink, uri->mountpoint,
strlen ( uri->mountpoint ) ) != 0 )
return -EINVAL;
len = strlen ( uri->lookup_pos ) + strlen ( symlink ) - \
strlen ( uri->mountpoint );
if ( ! ( new_path = malloc ( len * sizeof ( char ) ) ) )
return -ENOMEM;
strcpy ( new_path, symlink + strlen ( uri->mountpoint ) );
strcpy ( new_path + strlen ( new_path ), uri->lookup_pos );
} else {
len = strlen ( uri->lookup_pos ) + strlen ( symlink );
if ( ! ( new_path = malloc ( len * sizeof ( char ) ) ) )
return -ENOMEM;
strcpy ( new_path, symlink );
strcpy ( new_path + strlen ( new_path ), uri->lookup_pos );
}
free ( uri->path );
uri->lookup_pos = uri->path = new_path;
return 0;
}
char *nfs_uri_next_path_component ( struct nfs_uri *uri ) {
char *sep;
char *start;
if ( ! uri->path )
return NULL;
for ( sep = uri->lookup_pos ; *sep != '\0' && *sep != '/'; sep++ )
;
start = uri->lookup_pos;
uri->lookup_pos = sep;
if ( *sep != '\0' ) {
uri->lookup_pos++;
*sep = '\0';
if ( *start == '\0' )
return nfs_uri_next_path_component ( uri );
}
return start;
}
void nfs_uri_free ( struct nfs_uri *uri ) {
free ( uri->mountpoint );
free ( uri->path );
uri->mountpoint = NULL;
uri->path = NULL;
}
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