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efl/src/lib/eina/eina_file.c

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/* EINA - EFL data type library
* Copyright (C) 2007-2008 Jorge Luis Zapata Muga, Vincent Torri
* Copyright (C) 2010-2011 Cedric Bail
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library;
* if not, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdlib.h>
#include <string.h>
#include <stddef.h>
#include <stdint.h>
#ifdef HAVE_DIRENT_H
# include <dirent.h>
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#ifdef HAVE_SYS_MMAN_H
# include <sys/mman.h>
#endif
#include <fcntl.h>
#define PATH_DELIM '/'
#include "eina_config.h"
#include "eina_private.h"
#include "eina_alloca.h"
/* undefs EINA_ARG_NONULL() so NULL checks are not compiled out! */
#include "eina_safety_checks.h"
#include "eina_cpu.h"
#include "eina_file.h"
#include "eina_stringshare.h"
#include "eina_hash.h"
#include "eina_list.h"
#include "eina_lock.h"
#include "eina_mmap.h"
#include "eina_log.h"
#include "eina_xattr.h"
#include "eina_file_common.h"
#ifdef HAVE_ESCAPE
# include <Escape.h>
#endif
/*============================================================================*
* Local *
*============================================================================*/
/**
* @cond LOCAL
*/
#define EINA_SMALL_PAGE eina_cpu_page_size()
// FIXME: This assumes HugeTLB size of 2Mb. How to get this information at runtime?
#define EINA_HUGE_PAGE (2 * 1024 * 1024)
#define EINA_HUGE_PAGE_MIN (8 * EINA_HUGE_PAGE)
#ifdef HAVE_DIRENT_H
typedef struct _Eina_File_Iterator Eina_File_Iterator;
struct _Eina_File_Iterator
{
Eina_Iterator iterator;
DIR *dirp;
int length;
char dir[1];
};
#endif
int _eina_file_log_dom = -1;
/*
* This complex piece of code is needed due to possible race condition.
* The code and description of the issue can be found at :
* http://womble.decadent.org.uk/readdir_r-advisory.html
*/
#ifdef HAVE_DIRENT_H
static long
_eina_name_max(DIR *dirp EINA_UNUSED)
{
long name_max;
#if defined(HAVE_FPATHCONF) && defined(HAVE_DIRFD) && defined(_PC_NAME_MAX)
name_max = fpathconf(dirfd(dirp), _PC_NAME_MAX);
if (name_max == -1)
{
# if defined(NAME_MAX)
name_max = (NAME_MAX > 255) ? NAME_MAX : 255;
# else
name_max = PATH_MAX;
# endif
}
#else
# if defined(NAME_MAX)
name_max = (NAME_MAX > 255) ? NAME_MAX : 255;
# else
# ifdef _PC_NAME_MAX
# warning "buffer size for readdir_r cannot be determined safely, best effort, but racy"
name_max = pathconf(dirp, _PC_NAME_MAX);
# else
# error "buffer size for readdir_r cannot be determined safely"
# endif
# endif
#endif
return name_max;
}
static Eina_Bool
_eina_file_ls_iterator_next(Eina_File_Iterator *it, void **data)
{
struct dirent *dp;
char *name;
size_t length;
do
{
dp = readdir(it->dirp);
if (dp == NULL)
return EINA_FALSE;
}
while ((dp->d_name[0] == '.') &&
((dp->d_name[1] == '\0') ||
((dp->d_name[1] == '.') && (dp->d_name[2] == '\0'))));
#ifdef _DIRENT_HAVE_D_NAMLEN
length = dp->d_namlen;
#else
length = strlen(dp->d_name);
#endif
name = alloca(length + 2 + it->length);
memcpy(name, it->dir, it->length);
memcpy(name + it->length, "/", 1);
memcpy(name + it->length + 1, dp->d_name, length + 1);
*data = (char *)eina_stringshare_add(name);
return EINA_TRUE;
}
static DIR *
_eina_file_ls_iterator_container(Eina_File_Iterator *it)
{
return it->dirp;
}
static void
_eina_file_ls_iterator_free(Eina_File_Iterator *it)
{
closedir(it->dirp);
EINA_MAGIC_SET(&it->iterator, 0);
free(it);
}
typedef struct _Eina_File_Direct_Iterator Eina_File_Direct_Iterator;
struct _Eina_File_Direct_Iterator
{
Eina_Iterator iterator;
DIR *dirp;
int length;
Eina_File_Direct_Info info;
char dir[1];
};
static Eina_Bool
_eina_file_direct_ls_iterator_next(Eina_File_Direct_Iterator *it, void **data)
{
struct dirent *dp;
size_t length;
do
{
dp = readdir(it->dirp);
if (dp == NULL)
return EINA_FALSE;
#ifdef _DIRENT_HAVE_D_NAMLEN
length = dp->d_namlen;
#else
length = strlen(dp->d_name);
#endif
if (it->info.name_start + length + 1 >= EINA_PATH_MAX)
continue;
}
while ((dp->d_name[0] == '.') &&
((dp->d_name[1] == '\0') ||
((dp->d_name[1] == '.') && (dp->d_name[2] == '\0'))));
memcpy(it->info.path + it->info.name_start, dp->d_name, length);
it->info.name_length = length;
it->info.path_length = it->info.name_start + length;
it->info.path[it->info.path_length] = '\0';
#ifdef _DIRENT_HAVE_D_TYPE
switch (dp->d_type)
{
case DT_FIFO:
it->info.type = EINA_FILE_FIFO;
break;
case DT_CHR:
it->info.type = EINA_FILE_CHR;
break;
case DT_DIR:
it->info.type = EINA_FILE_DIR;
break;
case DT_BLK:
it->info.type = EINA_FILE_BLK;
break;
case DT_REG:
it->info.type = EINA_FILE_REG;
break;
case DT_LNK:
it->info.type = EINA_FILE_LNK;
break;
case DT_SOCK:
it->info.type = EINA_FILE_SOCK;
break;
case DT_WHT:
it->info.type = EINA_FILE_WHT;
break;
default:
it->info.type = EINA_FILE_UNKNOWN;
break;
}
#else
it->info.type = EINA_FILE_UNKNOWN;
#endif
*data = &it->info;
return EINA_TRUE;
}
static DIR *
_eina_file_direct_ls_iterator_container(Eina_File_Direct_Iterator *it)
{
return it->dirp;
}
static void
_eina_file_direct_ls_iterator_free(Eina_File_Direct_Iterator *it)
{
closedir(it->dirp);
EINA_MAGIC_SET(&it->iterator, 0);
free(it);
}
static Eina_Bool
_eina_file_stat_ls_iterator_next(Eina_File_Direct_Iterator *it, void **data)
{
Eina_Stat st;
if (!_eina_file_direct_ls_iterator_next(it, data))
return EINA_FALSE;
if (it->info.type == EINA_FILE_UNKNOWN)
{
if (eina_file_statat(it->dirp, &it->info, &st) != 0)
it->info.type = EINA_FILE_UNKNOWN;
}
return EINA_TRUE;
}
#endif
void
eina_file_real_close(Eina_File *file)
{
Eina_File_Map *map;
EINA_LIST_FREE(file->dead_map, map)
{
munmap(map->map, map->length);
free(map);
}
if (file->fd != -1)
{
if (!file->copied && file->global_map != MAP_FAILED)
munmap(file->global_map, file->length);
close(file->fd);
}
}
static void
_eina_file_map_close(Eina_File_Map *map)
{
munmap(map->map, map->length);
free(map);
}
#ifndef MAP_POPULATE
static unsigned int
_eina_file_map_populate(char *map, unsigned long int size, Eina_Bool hugetlb)
{
unsigned int r = 0xDEADBEEF;
unsigned long int i;
unsigned int s;
if (size == 0) return 0;
s = hugetlb ? EINA_HUGE_PAGE : EINA_SMALL_PAGE;
for (i = 0; i < size; i += s)
r ^= map[i];
r ^= map[size - 1];
return r;
}
#endif
static char *
_page_aligned_address(const char *map, unsigned long int offset, Eina_Bool hugetlb)
{
const uintptr_t align = hugetlb ? EINA_HUGE_PAGE : EINA_SMALL_PAGE;
uintptr_t pmap = (uintptr_t) map;
pmap = (pmap + offset) - ((pmap + offset) & (align - 1));
return (char *) pmap;
}
static int
_eina_file_map_rule_apply(Eina_File_Populate rule, const void *map, unsigned long int offset,
unsigned long int size, unsigned long long maplen, Eina_Bool hugetlb)
{
int tmp = 42;
int flag = MADV_RANDOM;
char *addr;
switch (rule)
{
case EINA_FILE_RANDOM: flag = MADV_RANDOM; break;
case EINA_FILE_SEQUENTIAL: flag = MADV_SEQUENTIAL; break;
case EINA_FILE_POPULATE: flag = MADV_WILLNEED; break;
case EINA_FILE_WILLNEED: flag = MADV_WILLNEED; break;
case EINA_FILE_DONTNEED: flag = MADV_DONTNEED; break;
#ifdef MADV_REMOVE
case EINA_FILE_REMOVE: flag = MADV_REMOVE; break;
#elif defined (MADV_FREE)
case EINA_FILE_REMOVE: flag = MADV_FREE; break;
#else
# warning "EINA_FILE_REMOVE does not have system support"
#endif
default: return tmp; break;
}
if (offset >= maplen) return tmp;
// Align address, clamp size
addr = _page_aligned_address(map, offset, hugetlb);
if (size > 0)
{
size += ((char *) map + offset) - addr;
offset -= ((char *) map + offset) - addr;
if ((offset + size) > maplen)
{
if (offset > maplen) return tmp;
size = maplen - offset;
}
}
madvise(addr, size, flag);
#ifndef MAP_POPULATE
if (rule == EINA_FILE_POPULATE)
tmp ^= _eina_file_map_populate(addr, size, hugetlb);
#else
(void) hugetlb;
#endif
return tmp;
}
static Eina_Bool
_eina_file_timestamp_compare(Eina_File *f, struct stat *st)
{
if (f->mtime != st->st_mtime) return EINA_FALSE;
if (f->length != (unsigned long long) st->st_size) return EINA_FALSE;
if (f->inode != st->st_ino) return EINA_FALSE;
#ifdef _STAT_VER_LINUX
# if (defined __USE_MISC && defined st_mtime)
if (f->mtime_nsec != (unsigned long int)st->st_mtim.tv_nsec)
return EINA_FALSE;
# else
if (f->mtime_nsec != (unsigned long int)st->st_mtimensec)
return EINA_FALSE;
# endif
#endif
return EINA_TRUE;
}
static void
slprintf(char *str, size_t size, const char *format, ...)
{
va_list ap;
va_start(ap, format);
vsnprintf(str, size, format, ap);
str[size - 1] = 0;
va_end(ap);
}
/**
* @endcond
*/
/*============================================================================*
* Global *
*============================================================================*/
static Eina_Bool
_eina_file_mmap_faulty_one(void *addr, long page_size,
Eina_File_Map *m)
{
if ((unsigned char *) addr < (((unsigned char *)m->map) + m->length) &&
(((unsigned char *) addr) + page_size) >= (unsigned char *) m->map)
{
m->faulty = EINA_TRUE;
return EINA_TRUE;
}
return EINA_FALSE;
}
Eina_Bool
eina_file_mmap_faulty(void *addr, long page_size)
{
Eina_File_Map *m;
Eina_File *f;
Eina_Iterator *itf;
Eina_Iterator *itm;
Eina_Bool faulty = EINA_FALSE;
eina_lock_take(&_eina_file_lock_cache);
itf = eina_hash_iterator_data_new(_eina_file_cache);
EINA_ITERATOR_FOREACH(itf, f)
{
eina_lock_take(&f->lock);
if (f->global_map != MAP_FAILED)
{
if ((unsigned char *)addr <
(((unsigned char *)f->global_map) + f->length) &&
(((unsigned char *)addr) + page_size) >=
(unsigned char *)f->global_map)
{
f->global_faulty = EINA_TRUE;
faulty = EINA_TRUE;
}
}
if (!faulty)
{
itm = eina_hash_iterator_data_new(f->map);
EINA_ITERATOR_FOREACH(itm, m)
{
faulty = _eina_file_mmap_faulty_one(addr, page_size, m);
if (faulty) break;
}
eina_iterator_free(itm);
}
if (!faulty)
{
Eina_List *l;
EINA_LIST_FOREACH(f->dead_map, l, m)
{
faulty = _eina_file_mmap_faulty_one(addr, page_size, m);
if (faulty) break;
}
}
eina_lock_release(&f->lock);
if (faulty) break;
}
eina_iterator_free(itf);
eina_lock_release(&_eina_file_lock_cache);
return faulty;
}
/* ================================================================ *
* Simplified logic for portability layer with eina_file_common *
* ================================================================ */
Eina_Bool
eina_file_path_relative(const char *path)
{
if (*path != '/') return EINA_TRUE;
return EINA_FALSE;
}
Eina_Tmpstr *
eina_file_current_directory_get(const char *path, size_t len)
{
char cwd[PATH_MAX];
char *tmp = NULL;
tmp = getcwd(cwd, PATH_MAX);
if (!tmp) return NULL;
len += strlen(cwd) + 2;
tmp = alloca(sizeof (char) * len);
slprintf(tmp, len, "%s/%s", cwd, path);
return eina_tmpstr_add_length(tmp, len);
}
char *
eina_file_cleanup(Eina_Tmpstr *path)
{
char *result;
result = strdup(path ? path : "");
eina_tmpstr_del(path);
return result;
}
/*============================================================================*
* API *
*============================================================================*/
EAPI Eina_Bool
eina_file_dir_list(const char *dir,
Eina_Bool recursive,
Eina_File_Dir_List_Cb cb,
void *data)
{
Eina_File_Direct_Info *info;
Eina_Iterator *it;
EINA_SAFETY_ON_NULL_RETURN_VAL(cb, EINA_FALSE);
EINA_SAFETY_ON_NULL_RETURN_VAL(dir, EINA_FALSE);
EINA_SAFETY_ON_TRUE_RETURN_VAL(dir[0] == '\0', EINA_FALSE);
it = eina_file_stat_ls(dir);
if (!it)
return EINA_FALSE;
EINA_ITERATOR_FOREACH(it, info)
{
cb(info->path + info->name_start, dir, data);
if (recursive == EINA_TRUE && info->type == EINA_FILE_DIR)
{
eina_file_dir_list(info->path, recursive, cb, data);
}
}
eina_iterator_free(it);
return EINA_TRUE;
}
EAPI Eina_Array *
eina_file_split(char *path)
{
Eina_Array *ea;
char *current;
size_t length;
EINA_SAFETY_ON_NULL_RETURN_VAL(path, NULL);
ea = eina_array_new(16);
if (!ea)
return NULL;
for (current = strchr(path, PATH_DELIM);
current;
path = current + 1, current = strchr(path, PATH_DELIM))
{
length = current - path;
if (length == 0)
continue;
eina_array_push(ea, path);
*current = '\0';
}
if (*path != '\0')
eina_array_push(ea, path);
return ea;
}
EAPI Eina_Iterator *
eina_file_ls(const char *dir)
{
#ifdef HAVE_DIRENT_H
Eina_File_Iterator *it;
size_t length;
DIR *dirp;
EINA_SAFETY_ON_NULL_RETURN_VAL(dir, NULL);
length = strlen(dir);
if (length < 1)
return NULL;
dirp = opendir(dir);
if (!dirp)
return NULL;
it = calloc(1, sizeof (Eina_File_Iterator) + length);
if (EINA_UNLIKELY(!it))
{
closedir(dirp);
return NULL;
}
EINA_MAGIC_SET(&it->iterator, EINA_MAGIC_ITERATOR);
it->dirp = dirp;
memcpy(it->dir, dir, length + 1);
if (dir[length - 1] != '/')
it->length = length;
else
it->length = length - 1;
it->iterator.version = EINA_ITERATOR_VERSION;
it->iterator.next = FUNC_ITERATOR_NEXT(_eina_file_ls_iterator_next);
it->iterator.get_container = FUNC_ITERATOR_GET_CONTAINER(
_eina_file_ls_iterator_container);
it->iterator.free = FUNC_ITERATOR_FREE(_eina_file_ls_iterator_free);
return &it->iterator;
#else
(void) dir;
return NULL;
#endif
}
EAPI Eina_Iterator *
eina_file_direct_ls(const char *dir)
{
#ifdef HAVE_DIRENT_H
Eina_File_Direct_Iterator *it;
size_t length;
DIR *dirp;
EINA_SAFETY_ON_NULL_RETURN_VAL(dir, NULL);
length = strlen(dir);
if (length < 1)
return NULL;
dirp = opendir(dir);
if (!dirp)
return NULL;
it = calloc(1, sizeof(Eina_File_Direct_Iterator) + length);
if (EINA_UNLIKELY(!it))
{
closedir(dirp);
return NULL;
}
EINA_MAGIC_SET(&it->iterator, EINA_MAGIC_ITERATOR);
it->dirp = dirp;
if (length + _eina_name_max(it->dirp) + 2 >= EINA_PATH_MAX)
{
_eina_file_direct_ls_iterator_free(it);
return NULL;
}
memcpy(it->dir, dir, length + 1);
it->length = length;
memcpy(it->info.path, dir, length);
if (dir[length - 1] == '/')
it->info.name_start = length;
else
{
it->info.path[length] = '/';
it->info.name_start = length + 1;
}
it->iterator.version = EINA_ITERATOR_VERSION;
it->iterator.next = FUNC_ITERATOR_NEXT(_eina_file_direct_ls_iterator_next);
it->iterator.get_container = FUNC_ITERATOR_GET_CONTAINER(
_eina_file_direct_ls_iterator_container);
it->iterator.free = FUNC_ITERATOR_FREE(_eina_file_direct_ls_iterator_free);
return &it->iterator;
#else
(void) dir;
return NULL;
#endif
}
EAPI Eina_Iterator *
eina_file_stat_ls(const char *dir)
{
#ifdef HAVE_DIRENT_H
Eina_File_Direct_Iterator *it;
size_t length;
DIR *dirp;
EINA_SAFETY_ON_NULL_RETURN_VAL(dir, NULL);
length = strlen(dir);
if (length < 1)
return NULL;
dirp = opendir(dir);
if (!dirp)
return NULL;
it = calloc(1, sizeof(Eina_File_Direct_Iterator) + length);
if (EINA_UNLIKELY(!it))
{
closedir(dirp);
return NULL;
}
EINA_MAGIC_SET(&it->iterator, EINA_MAGIC_ITERATOR);
it->dirp = dirp;
if (length + _eina_name_max(it->dirp) + 2 >= EINA_PATH_MAX)
{
_eina_file_direct_ls_iterator_free(it);
return NULL;
}
memcpy(it->dir, dir, length + 1);
it->length = length;
memcpy(it->info.path, dir, length);
if (dir[length - 1] == '/')
it->info.name_start = length;
else
{
it->info.path[length] = '/';
it->info.name_start = length + 1;
}
it->iterator.version = EINA_ITERATOR_VERSION;
it->iterator.next = FUNC_ITERATOR_NEXT(_eina_file_stat_ls_iterator_next);
it->iterator.get_container = FUNC_ITERATOR_GET_CONTAINER(
_eina_file_direct_ls_iterator_container);
it->iterator.free = FUNC_ITERATOR_FREE(_eina_file_direct_ls_iterator_free);
return &it->iterator;
#else
(void) dir;
return NULL;
#endif
}
EAPI Eina_File *
eina_file_open(const char *path, Eina_Bool shared)
{
Eina_File *file;
Eina_File *n;
Eina_Stringshare *filename;
struct stat file_stat;
int fd = -1;
EINA_SAFETY_ON_NULL_RETURN_VAL(path, NULL);
filename = eina_file_sanitize(path);
if (!filename) return NULL;
if (shared)
{
#ifdef HAVE_SHM_OPEN
fd = shm_open(filename, O_RDONLY, S_IRWXU | S_IRWXG | S_IRWXO);
if ((fd != -1) && (!eina_file_close_on_exec(fd, EINA_TRUE)))
goto on_error;
#else
goto on_error;
#endif
}
else
{
#ifdef HAVE_OPEN_CLOEXEC
fd = open(filename, O_RDONLY, S_IRWXU | S_IRWXG | S_IRWXO | O_CLOEXEC);
#else
fd = open(filename, O_RDONLY, S_IRWXU | S_IRWXG | S_IRWXO);
if ((fd != -1) && (!eina_file_close_on_exec(fd, EINA_TRUE)))
goto on_error;
#endif
}
if (fd < 0) goto on_error;
if (fstat(fd, &file_stat))
goto on_error;
eina_lock_take(&_eina_file_lock_cache);
file = eina_hash_find(_eina_file_cache, filename);
if ((file) && !_eina_file_timestamp_compare(file, &file_stat))
{
file->delete_me = EINA_TRUE;
eina_hash_del(_eina_file_cache, file->filename, file);
file = NULL;
}
if (!file)
{
n = malloc(sizeof(Eina_File));
if (!n)
{
eina_lock_release(&_eina_file_lock_cache);
goto on_error;
}
memset(n, 0, sizeof(Eina_File));
n->filename = filename;
n->map = eina_hash_new(EINA_KEY_LENGTH(eina_file_map_key_length),
EINA_KEY_CMP(eina_file_map_key_cmp),
EINA_KEY_HASH(eina_file_map_key_hash),
EINA_FREE_CB(_eina_file_map_close),
3);
n->rmap = eina_hash_pointer_new(NULL);
n->global_map = MAP_FAILED;
n->length = file_stat.st_size;
n->mtime = file_stat.st_mtime;
#ifdef _STAT_VER_LINUX
# if (defined __USE_MISC && defined st_mtime)
n->mtime_nsec = (unsigned long int)file_stat.st_mtim.tv_nsec;
# else
n->mtime_nsec = (unsigned long int)file_stat.st_mtimensec;
# endif
#endif
n->inode = file_stat.st_ino;
n->fd = fd;
n->shared = shared;
eina_lock_new(&n->lock);
eina_hash_direct_add(_eina_file_cache, n->filename, n);
EINA_MAGIC_SET(n, EINA_FILE_MAGIC);
}
else
{
close(fd);
n = file;
}
eina_lock_take(&n->lock);
n->refcount++;
eina_lock_release(&n->lock);
eina_lock_release(&_eina_file_lock_cache);
return n;
on_error:
INF("Could not open file [%s].", filename);
eina_stringshare_del(filename);
if (fd >= 0) close(fd);
return NULL;
}
EAPI Eina_Bool
eina_file_refresh(Eina_File *file)
{
struct stat file_stat;
Eina_Bool r = EINA_FALSE;
EINA_SAFETY_ON_NULL_RETURN_VAL(file, EINA_FALSE);
if (file->virtual) return EINA_FALSE;
if (fstat(file->fd, &file_stat))
return EINA_FALSE;
if (file->length != (unsigned long int) file_stat.st_size)
{
eina_file_flush(file, file_stat.st_size);
r = EINA_TRUE;
}
file->length = file_stat.st_size;
file->mtime = file_stat.st_mtime;
#ifdef _STAT_VER_LINUX
# if (defined __USE_MISC && defined st_mtime)
file->mtime_nsec = (unsigned long int)file_stat.st_mtim.tv_nsec;
# else
file->mtime_nsec = (unsigned long int)file_stat.st_mtimensec;
# endif
#endif
file->inode = file_stat.st_ino;
return r;
}
EAPI Eina_Bool
eina_file_unlink(const char *pathname)
{
if ( unlink(pathname) < 0)
{
return EINA_FALSE;
}
return EINA_TRUE;
}
EAPI void *
eina_file_map_all(Eina_File *file, Eina_File_Populate rule)
{
int flags = MAP_SHARED;
void *ret = NULL;
EINA_SAFETY_ON_NULL_RETURN_VAL(file, NULL);
if (file->virtual) return eina_file_virtual_map_all(file);
// bsd people will lack this feature
#ifdef MAP_POPULATE
if (rule == EINA_FILE_POPULATE) flags |= MAP_POPULATE;
#endif
#ifdef MAP_HUGETLB
if (file->length >= EINA_HUGE_PAGE_MIN) flags |= MAP_HUGETLB;
#endif
eina_mmap_safety_enabled_set(EINA_TRUE);
eina_lock_take(&file->lock);
if (file->global_map == MAP_FAILED)
file->global_map = mmap(NULL, file->length, PROT_READ, flags, file->fd, 0);
#ifdef MAP_HUGETLB
if ((file->global_map == MAP_FAILED) && (flags & MAP_HUGETLB))
{
flags &= ~MAP_HUGETLB;
file->global_map = mmap(NULL, file->length, PROT_READ, flags, file->fd, 0);
}
#endif
if (file->global_map != MAP_FAILED)
{
Eina_Bool hugetlb = EINA_FALSE;
#ifdef MAP_HUGETLB
hugetlb = !!(flags & MAP_HUGETLB);
#endif
if (!file->global_refcount)
file->global_hugetlb = hugetlb;
else
hugetlb = file->global_hugetlb;
_eina_file_map_rule_apply(rule, file->global_map, 0, file->length, file->length, hugetlb);
file->global_refcount++;
ret = file->global_map;
}
eina_lock_release(&file->lock);
return ret;
}
EAPI void *
eina_file_map_new(Eina_File *file, Eina_File_Populate rule,
unsigned long int offset, unsigned long int length)
{
Eina_File_Map *map;
unsigned long int key[2];
EINA_SAFETY_ON_NULL_RETURN_VAL(file, NULL);
if (offset > file->length)
return NULL;
if (offset + length > file->length)
return NULL;
if (offset == 0 && length == file->length)
return eina_file_map_all(file, rule);
if (file->virtual)
return eina_file_virtual_map_new(file, offset, length);
key[0] = offset;
key[1] = length;
eina_mmap_safety_enabled_set(EINA_TRUE);
eina_lock_take(&file->lock);
map = eina_hash_find(file->map, &key);
if (!map)
{
int flags = MAP_SHARED;
// bsd people will lack this feature
#ifdef MAP_POPULATE
if (rule == EINA_FILE_POPULATE) flags |= MAP_POPULATE;
#endif
#ifdef MAP_HUGETLB
if (length >= EINA_HUGE_PAGE_MIN) flags |= MAP_HUGETLB;
#endif
map = malloc(sizeof (Eina_File_Map));
if (!map) goto on_error;
map->map = mmap(NULL, length, PROT_READ, flags, file->fd, offset);
#ifdef MAP_HUGETLB
if (map->map == MAP_FAILED && (flags & MAP_HUGETLB))
{
flags &= ~MAP_HUGETLB;
map->map = mmap(NULL, length, PROT_READ, flags, file->fd, offset);
}
map->hugetlb = !!(flags & MAP_HUGETLB);
#else
map->hugetlb = EINA_FALSE;
#endif
map->offset = offset;
map->length = length;
map->refcount = 0;
if (map->map == MAP_FAILED) goto on_error;
eina_hash_add(file->map, &key, map);
eina_hash_direct_add(file->rmap, &map->map, map);
}
map->refcount++;
_eina_file_map_rule_apply(rule, map->map, 0, length, map->length, map->hugetlb);
eina_lock_release(&file->lock);
return map->map;
on_error:
free(map);
eina_lock_release(&file->lock);
return NULL;
}
EAPI void
eina_file_map_free(Eina_File *file, void *map)
{
EINA_SAFETY_ON_NULL_RETURN(file);
if (file->virtual)
{
eina_file_virtual_map_free(file, map);
return;
}
eina_lock_take(&file->lock);
if (file->global_map == map)
{
file->global_refcount--;
if (file->global_refcount > 0) goto on_exit;
munmap(file->global_map, file->length);
file->global_map = MAP_FAILED;
}
else
{
eina_file_common_map_free(file, map, _eina_file_map_close);
}
on_exit:
eina_lock_release(&file->lock);
}
EAPI void
eina_file_map_populate(Eina_File *file, Eina_File_Populate rule, const void *map,
unsigned long int offset, unsigned long int length)
{
Eina_File_Map *em;
EINA_SAFETY_ON_NULL_RETURN(file);
eina_lock_take(&file->lock);
if (map == file->global_map)
_eina_file_map_rule_apply(rule, map, offset, length, file->length, file->global_hugetlb);
else if ((em = eina_hash_find(file->rmap, &map)) != NULL)
_eina_file_map_rule_apply(rule, map, offset, length, em->length, em->hugetlb);
eina_lock_release(&file->lock);
}
EAPI Eina_Bool
eina_file_map_faulted(Eina_File *file, void *map)
{
Eina_Bool r = EINA_FALSE;
EINA_SAFETY_ON_NULL_RETURN_VAL(file, EINA_FALSE);
if (file->virtual) return EINA_FALSE;
eina_lock_take(&file->lock);
if (file->global_map == map)
{
r = file->global_faulty;
}
else
{
Eina_File_Map *em;
em = eina_hash_find(file->rmap, &map);
if (em)
{
r = em->faulty;
}
else
{
Eina_List *l;
EINA_LIST_FOREACH(file->dead_map, l, em)
if (em->map == map)
{
r = em->faulty;
break;
}
}
}
eina_lock_release(&file->lock);
return r;
}
EAPI Eina_Iterator *
eina_file_xattr_get(Eina_File *file)
{
EINA_SAFETY_ON_NULL_RETURN_VAL(file, NULL);
if (file->virtual) return NULL;
return eina_xattr_fd_ls(file->fd);
}
EAPI Eina_Iterator *
eina_file_xattr_value_get(Eina_File *file)
{
EINA_SAFETY_ON_NULL_RETURN_VAL(file, NULL);
if (file->virtual) return NULL;
return eina_xattr_value_fd_ls(file->fd);
}
EAPI int
eina_file_statat(void *container, Eina_File_Direct_Info *info, Eina_Stat *st)
{
struct stat buf;
#ifdef HAVE_ATFILE_SOURCE
int fd;
#endif
EINA_SAFETY_ON_NULL_RETURN_VAL(info, -1);
EINA_SAFETY_ON_NULL_RETURN_VAL(st, -1);
#ifdef HAVE_ATFILE_SOURCE
fd = dirfd((DIR*) container);
if (fstatat(fd, info->path + info->name_start, &buf, 0))
#else
(void)container;
if (stat(info->path, &buf))
#endif
{
if (info->type != EINA_FILE_LNK)
info->type = EINA_FILE_UNKNOWN;
return -1;
}
if (info->type == EINA_FILE_UNKNOWN)
{
if (S_ISREG(buf.st_mode))
info->type = EINA_FILE_REG;
else if (S_ISDIR(buf.st_mode))
info->type = EINA_FILE_DIR;
else if (S_ISCHR(buf.st_mode))
info->type = EINA_FILE_CHR;
else if (S_ISBLK(buf.st_mode))
info->type = EINA_FILE_BLK;
else if (S_ISFIFO(buf.st_mode))
info->type = EINA_FILE_FIFO;
else if (S_ISLNK(buf.st_mode))
info->type = EINA_FILE_LNK;
else if (S_ISSOCK(buf.st_mode))
info->type = EINA_FILE_SOCK;
else
info->type = EINA_FILE_UNKNOWN;
}
st->dev = buf.st_dev;
st->ino = buf.st_ino;
st->mode = buf.st_mode;
st->nlink = buf.st_nlink;
st->uid = buf.st_uid;
st->gid = buf.st_gid;
st->rdev = buf.st_rdev;
st->size = buf.st_size;
st->blksize = buf.st_blksize;
st->blocks = buf.st_blocks;
st->atime = buf.st_atime;
st->mtime = buf.st_mtime;
st->ctime = buf.st_ctime;
#ifdef _STAT_VER_LINUX
# if (defined __USE_MISC && defined st_mtime)
st->atimensec = buf.st_atim.tv_nsec;
st->mtimensec = buf.st_mtim.tv_nsec;
st->ctimensec = buf.st_ctim.tv_nsec;
# else
st->atimensec = buf.st_atimensec;
st->mtimensec = buf.st_mtimensec;
st->ctimensec = buf.st_ctimensec;
# endif
#else
st->atimensec = 0;
st->mtimensec = 0;
st->ctimensec = 0;
#endif
return 0;
}
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