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Diffstat (limited to 'netfs-sample/lib.c')
| -rw-r--r-- | netfs-sample/lib.c | 193 |
1 files changed, 0 insertions, 193 deletions
diff --git a/netfs-sample/lib.c b/netfs-sample/lib.c deleted file mode 100644 index aa0ff0be..00000000 --- a/netfs-sample/lib.c +++ /dev/null @@ -1,193 +0,0 @@ -/*----------------------------------------------------------------------------*/ -/*lib.h*/ -/*----------------------------------------------------------------------------*/ -/*Basic routines for filesystem manipulations*/ -/*----------------------------------------------------------------------------*/ -/*Based on the code of unionfs translator.*/ -/*----------------------------------------------------------------------------*/ -/*Copyright (C) 2001, 2002, 2005 Free Software Foundation, Inc. - Written by Sergiu Ivanov <unlimitedscolobb@gmail.com>. - - 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 * (at your option) 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 - USA.*/ -/*----------------------------------------------------------------------------*/ - -/*----------------------------------------------------------------------------*/ -#define _GNU_SOURCE 1 -/*----------------------------------------------------------------------------*/ -#include <sys/mman.h> -/*----------------------------------------------------------------------------*/ -#include "lib.h" -#include "debug.h" -/*----------------------------------------------------------------------------*/ - -/*----------------------------------------------------------------------------*/ -/*--------Functions-----------------------------------------------------------*/ -/*Fetches directory entries for `dir`*/ -error_t -dir_entries_get - ( - file_t dir, - char ** dirent_data, /*the list of directory entries as returned - by dir_readdir*/ - size_t * dirent_data_size, /*the size of `dirent_data`*/ - struct dirent *** dirent_list /*the array of pointers to beginnings of - dirents in dirent_data*/ - ) - { - error_t err = 0; - - /*The data (array of dirents(?)) returned by dir_readdir*/ - char * data; - - /*The size of `data`*/ - size_t data_size; - - /*The number of entries in `data`*/ - int entries_num; - - /*Try to read the contents of the specified directory*/ - err = dir_readdir(dir, &data, &data_size, 0, -1, 0, &entries_num); - if(err) - return err; - - /*Create a new list of dirents*/ - struct dirent ** list; - - /*Allocate the memory for the list of dirents and for the - finalizing element*/ - list = malloc(sizeof(struct dirent *) * (entries_num + 1)); - - /*If memory allocation has failed*/ - if(!list) - { - /*free the result of dir_readdir*/ - munmap(data, data_size); - - /*return the corresponding error*/ - return ENOMEM; - } - - /*The current directory entry*/ - struct dirent * dp; - - int i; - - /*Go through every element of the list of dirents*/ - for - ( - i = 0, dp = (struct dirent *)data; - i < entries_num; - ++i, dp = (struct dirent *)((char *)dp + dp->d_reclen)) - /*copy the current value into the list*/ - *(list + i) = dp; - - /*Nullify the last element of the list*/ - *(list + i) = NULL; - - /*Copy the required values in the parameters*/ - *dirent_data = data; - *dirent_data_size = data_size; - *dirent_list = list; - - /*Return success*/ - return err; - }/*dir_entries_get*/ -/*----------------------------------------------------------------------------*/ -/*Lookup `name` under `dir` (or cwd, if `dir` is invalid)*/ -error_t -file_lookup - ( - file_t dir, - char * name, - int flags0, /*try to open with these flags first*/ - int flags1, /*try to open with these flags, if `flags0` fail*/ - int mode, /*if the file is to be created, create it with this mode*/ - file_t * port, /*store the port to the looked up file here*/ - io_statbuf_t * stat /*store the stat information here*/ - ) - { - error_t err = 0; - - /*The port to the looked up file*/ - file_t p; - - /*The stat information about the looked up file*/ - io_statbuf_t s; - - /*Performs a lookup under 'dir' or in cwd, if `dir` is invalid*/ - file_t - do_file_lookup - ( - file_t dir, - char * name, /*lookup this file*/ - int flags, /*lookup the file with these flags*/ - int mode /*if a new file is to be created, create it with this mode*/ - ) - { - /*The result of lookup*/ - file_t p; - - /*If `dir` is a valid port*/ - if(dir != MACH_PORT_NULL) - /*try to lookup `name` under `dir`*/ - p = file_name_lookup_under(dir, name, flags, mode); - else - /*lookup `name` under current cwd*/ - p = file_name_lookup(name, flags, mode); - - /*Return the result of the lookup*/ - return p; - }/*do_file_lookup*/ - - /*Lookup `name` under the suggested `dir`*/ - p = do_file_lookup(dir, name, flags0, mode); - - /*If the lookup failed*/ - if(p == MACH_PORT_NULL) - /*try to lookup for `name` using alternative flags `flags1`*/ - p = do_file_lookup(dir, name, flags1, mode); - - /*If the port is valid*/ - if(p != MACH_PORT_NULL) - { - /*If stat information is required*/ - if(stat) - { - /*obtain stat information for `p`*/ - err = io_stat(p, &s); - if(err) - PORT_DEALLOC(p); - } - } - else - /*copy `errno` into `err`*/ - err = errno; - - /*If no errors have happened during lookup*/ - if(!err) - { - /*copy the resulting port into *`port`*/ - *port = p; - - /*fill in the receiver for stat information, if requried*/ - if(stat) - *stat = s; - } - - /*Return the result of performing operations*/ - return err; - }/*file_lookup*/ -/*----------------------------------------------------------------------------*/ |