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