blob: 4b907c3c4b40c780b45ae3fc0ab33c0b3e5f3f30 [file] [log] [blame] [raw]
/*
* open.c: open implementations for Windows.
*
* This file has no copyright assigned and is placed in the Public Domain.
* This file is a part of the mingw-runtime package.
* No warranty is given; refer to the file DISCLAIMER within the package.
*
* Written by Pedro Alves <pedro_alves@portugalmail.pt> Feb 2007
*
*/
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <windows.h>
#include <limits.h>
#include <errno.h>
static int vopen(const char *path, int oflag, va_list ap) {
unsigned long int fileaccess;
unsigned long int fileshare;
unsigned long int filecreate;
unsigned long int fileattrib = 0;
void *hnd;
if(!path) {
errno = EFAULT;
return -1;
}
wchar_t wpath[PATH_MAX];
size_t path_len = strlen(path) + 1;
if(path_len == 1) {
errno = ENOENT;
return -1;
}
if(path_len > PATH_MAX) {
errno = ENAMETOOLONG;
return -1;
}
if(mbstowcs(wpath, path, path_len) < 0) {
//errno = ENOENT;
return -1;
}
switch(oflag & (O_RDONLY | O_WRONLY | O_RDWR)) {
case O_RDONLY:
fileaccess = GENERIC_READ;
break;
case O_WRONLY:
fileaccess = GENERIC_WRITE;
break;
case O_RDWR:
fileaccess = GENERIC_READ | GENERIC_WRITE;
break;
default:
errno = EINVAL;
return -1;
}
switch (oflag & (O_CREAT | O_EXCL | O_TRUNC)) {
case 0:
case O_EXCL: /* ignore EXCL w/o CREAT */
filecreate = OPEN_EXISTING;
break;
case O_CREAT:
filecreate = OPEN_ALWAYS;
break;
case O_CREAT | O_EXCL:
case O_CREAT | O_TRUNC | O_EXCL:
filecreate = CREATE_NEW;
break;
case O_TRUNC:
case O_TRUNC | O_EXCL: /* ignore EXCL w/o CREAT */
filecreate = TRUNCATE_EXISTING;
break;
case O_CREAT | O_TRUNC:
filecreate = CREATE_ALWAYS;
break;
default:
/* this can't happen ... all cases are covered */
return -1;
}
fileshare = FILE_SHARE_READ;
if(oflag & O_CREAT) {
mode_t pmode = va_arg(ap, int);
if((pmode & S_IWRITE) != S_IWRITE) fileattrib |= FILE_ATTRIBUTE_READONLY;
}
if(!fileattrib) fileattrib = FILE_ATTRIBUTE_NORMAL;
hnd = CreateFileW(wpath, fileaccess, fileshare, NULL, filecreate, fileattrib, NULL);
if(hnd == INVALID_HANDLE_VALUE) return -1;
if(oflag & O_APPEND) SetFilePointer(hnd, 0, NULL, FILE_END);
return (int)hnd;
}
int _open(const char *path, int oflag, ...) {
va_list ap;
int ret;
va_start(ap, oflag);
ret = vopen(path, oflag, ap);
va_end(ap);
return ret;
}
int open(const char *path, int oflag, ...) {
va_list ap;
int ret;
va_start(ap, oflag);
ret = vopen(path, oflag, ap);
va_end(ap);
return ret;
}