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Using lstat also in Windows.

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This commit is contained in:
Andrea Mazzoleni 2011-06-11 10:19:34 +02:00
parent 3d12eaaa97
commit 0365488ce9
4 changed files with 26 additions and 12 deletions
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1
HISTORY
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@ -9,6 +9,7 @@ SnapRAID HISTORY
to remove the warning.
* In fixing, if a file cannot be written for missing permission, an error is
reported only if a write is effectively required.
* Ignores any symbolic links. They are not backuped.
1.3 2011/5
==========

22
mingw.c
View file

@ -121,10 +121,16 @@ static void windows_info2stat(const BY_HANDLE_FILE_INFORMATION* info, struct win
*/
static void windows_finddata2stat(const WIN32_FIND_DATAW* info, struct windows_stat* st)
{
/* Convert special attributes to a char device */
/* Convert special attributes */
if ((info->dwFileAttributes & FILE_ATTRIBUTE_DEVICE) != 0) {
st->st_mode = S_IFBLK;
} else if ((info->dwFileAttributes & (FILE_ATTRIBUTE_SYSTEM | FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_TEMPORARY | FILE_ATTRIBUTE_OFFLINE | FILE_ATTRIBUTE_REPARSE_POINT)) != 0) {
} else if ((info->dwFileAttributes & (
FILE_ATTRIBUTE_SYSTEM /* System files */
| FILE_ATTRIBUTE_HIDDEN /* Hidden files */
| FILE_ATTRIBUTE_TEMPORARY /* Files going to be deleted on close */
| FILE_ATTRIBUTE_OFFLINE
| FILE_ATTRIBUTE_REPARSE_POINT /* Symbolic links */
)) != 0) {
st->st_mode = S_IFCHR;
} else if ((info->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) != 0) {
st->st_mode = S_IFDIR;
@ -214,7 +220,7 @@ int windows_fstat(int fd, struct windows_stat* st)
return 0;
}
int windows_stat(const char* file, struct windows_stat* st)
int windows_lstat(const char* file, struct windows_stat* st)
{
HANDLE h;
WIN32_FIND_DATAW data;
@ -245,12 +251,18 @@ int windows_mkdir(const char* file)
return _wmkdir(u8tou16(file));
}
int stat_inode(const char* file, struct windows_stat* st)
int lstat_inode(const char* file, struct windows_stat* st)
{
BY_HANDLE_FILE_INFORMATION info;
HANDLE h;
h = CreateFileW(u8tou16(file), 0, FILE_SHARE_READ | FILE_SHARE_WRITE, 0, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0);
/*
* Open the handle of the file.
*
* Use FILE_FLAG_BACKUP_SEMANTICS to open directories and to override the file security checks.
* Use FILE_FLAG_OPEN_REPARSE_POINT to open symbolic links and not the their target.
*/
h = CreateFileW(u8tou16(file), 0, FILE_SHARE_READ | FILE_SHARE_WRITE, 0, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OPEN_REPARSE_POINT, 0);
if (h == INVALID_HANDLE_VALUE) {
windows_errno(GetLastError());
return -1;

11
mingw.h
View file

@ -32,6 +32,7 @@
#define fopen windows_fopen
#define open windows_open
#define stat windows_stat
#define lstat windows_lstat
#define access windows_access
#define off_t off64_t
#define lseek lseek64
@ -67,7 +68,7 @@ int windows_fstat(int fd, struct windows_stat* st);
/**
* Like the C stat() but without inode information.
*/
int windows_stat(const char* file, struct windows_stat* st);
int windows_lstat(const char* file, struct windows_stat* st);
/**
* Like the C access().
@ -80,12 +81,12 @@ int windows_access(const char* file, int mode);
int windows_mkdir(const char* file);
/**
* Like the C stat() with inode information.
* Like the C lstat() with inode information.
* It doesn't work for all kind of files and directories. For example "\System Volume Information" cannot be opened.
* Note that instead stat() works for all the files.
* Note that instead lstat() works for all the files.
*/
#define HAVE_STAT_INODE 1
int stat_inode(const char* file, struct windows_stat* st);
#define HAVE_LSTAT_INODE 1
int lstat_inode(const char* file, struct windows_stat* st);
/**
* Like the C ftruncate().

4
scan.c
View file

@ -258,9 +258,9 @@ static void scan_dir(struct snapraid_scan* scan, struct snapraid_state* state, s
continue;
}
#if HAVE_STAT_INODE
#if HAVE_LSTAT_INODE
/* get inode info about the file, Windows needs an additional step */
if (stat_inode(path_next, &st) != 0) {
if (lstat_inode(path_next, &st) != 0) {
fprintf(stderr, "Error in stat_inode file '%s'. %s.\n", path_next, strerror(errno));
exit(EXIT_FAILURE);
}