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Remove custom version of readlink in pgut_port

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Postgres has its own version in lpgport relying on junction points,
so if we consider a WIN32 port this is actually not necessary.
This commit is contained in:
Michael Paquier 2016-01-20 13:19:59 +09:00
parent 1ae2feb38f
commit fa248a0507
2 changed files with 0 additions and 125 deletions
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111
pgut/pgut-port.c
View File

@ -15,117 +15,6 @@
#include <unistd.h>
#include <fcntl.h>
#ifdef WIN32
#include <winioctl.h>
#define REPARSE_DATA_SIZE 1024
/* same layout as REPARSE_DATA_BUFFER, which is defined only in old winnt.h */
typedef struct REPARSE_DATA
{
ULONG ReparseTag;
WORD ReparseDataLength;
WORD Reserved;
union
{
struct
{
WORD SubstituteNameOffset;
WORD SubstituteNameLength;
WORD PrintNameOffset;
WORD PrintNameLength;
ULONG Flags;
WCHAR PathBuffer[1];
} Symlink;
struct
{
WORD SubstituteNameOffset;
WORD SubstituteNameLength;
WORD PrintNameOffset;
WORD PrintNameLength;
WCHAR PathBuffer[1];
} Mount;
struct
{
BYTE DataBuffer[REPARSE_DATA_SIZE];
} Generic;
};
} REPARSE_DATA;
ssize_t
readlink(const char *path, char *target, size_t size)
{
HANDLE handle;
DWORD attr;
REPARSE_DATA data;
DWORD datasize;
PCWSTR wpath;
int wlen;
int r;
attr = GetFileAttributes(path);
if (attr == INVALID_FILE_ATTRIBUTES)
{
_dosmaperr(GetLastError());
return -1;
}
if ((attr & FILE_ATTRIBUTE_REPARSE_POINT) == 0)
{
errno = EINVAL; /* not a symlink */
return -1;
}
handle = CreateFileA(path, 0,
FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE, NULL,
OPEN_EXISTING,
FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OPEN_REPARSE_POINT, NULL);
if (handle == INVALID_HANDLE_VALUE)
{
_dosmaperr(GetLastError());
return -1;
}
wpath = NULL;
if (DeviceIoControl(handle, FSCTL_GET_REPARSE_POINT, NULL, 0,
&data, sizeof(data), &datasize, NULL))
{
switch (data.ReparseTag)
{
case IO_REPARSE_TAG_MOUNT_POINT:
{
wpath = data.Mount.PathBuffer + data.Mount.SubstituteNameOffset;
wlen = data.Mount.SubstituteNameLength;
break;
}
case IO_REPARSE_TAG_SYMLINK:
{
wpath = data.Symlink.PathBuffer + data.Symlink.SubstituteNameOffset;
wlen = data.Symlink.SubstituteNameLength;
break;
}
}
}
if (wpath == NULL)
r = -1;
else
{
if (wcsncmp(wpath, L"\\??\\", 4) == 0 ||
wcsncmp(wpath, L"\\\\?\\", 4) == 0)
{
wpath += 4;
wlen -= 4;
}
r = WideCharToMultiByte(CP_ACP, 0, wpath, wlen, target, size, NULL, NULL);
}
CloseHandle(handle);
return r;
}
#endif
#ifdef PGUT_FLOCK
#ifdef WIN32

14
pgut/pgut-port.h
View File

@ -10,20 +10,6 @@
#ifndef PGUT_PORT_H
#define PGUT_PORT_H
/*
* readlink ports
*/
#ifdef WIN32
#define S_IFLNK (0)
#define S_IRWXG (0)
#define S_IRWXO (0)
#define S_ISLNK(mode) (0)
extern ssize_t readlink(const char *path, char *target, size_t size);
#endif
/*
* flock ports
*/