diff options
Diffstat (limited to 'private/crt32/lowio/fstat.c')
| -rw-r--r-- | private/crt32/lowio/fstat.c | 352 |
1 files changed, 352 insertions, 0 deletions
diff --git a/private/crt32/lowio/fstat.c b/private/crt32/lowio/fstat.c new file mode 100644 index 000000000..dcb013203 --- /dev/null +++ b/private/crt32/lowio/fstat.c @@ -0,0 +1,352 @@ +/*** +*fstat.c - OS/2 return file status info +* +* Copyright (c) 1985-1993, Microsoft Corporation. All rights reserved. +* +*Purpose: +* defines fstat() - return file status info +* +*Revision History: +* 03-??-84 RLB Module created +* 05-??-84 DCW Added register variables +* 05-19-86 SKS Ported to OS/2 +* 05-21-87 SKS Cleaned up declarations and include files +* 11-01-87 JCR Multi-thread support +* 12-11-87 JCR Added "_LOAD_DS" to declaration +* 05-25-88 PHG Merged DLL and normal version +* 10-03-88 GJF Adapted for new DOSCALLS.H, DOSTYPES.H. +* 10-04-88 JCR 386: Removed 'far' keyword +* 10-10-88 GJF Made API names match DOSCALLS.H +* 11-07-88 GJF Cleanup, now specific to 386 +* 04-13-89 JCR New syscall interface +* 05-23-89 PHG Added mask to ignore network bit when testing handle +* type +* 05-25-89 JCR 386 OS/2 calls use '_syscall' calling convention +* 03-12-90 GJF Replaced _LOAD_DS with _CALLTYPE1, added #include +* <cruntime.h>, removed #include <register.h> and fixed +* the copyright. Also, cleaned up the formatting a bit. +* 04-04-90 GJF Removed #include <dos.h>. +* 07-24-90 SBM Removed '32' from API names +* 08-13-90 SBM Compiles cleanly with -W3 +* 09-28-90 GJF New-style function declarator. +* 12-04-90 SRW Changed to include <oscalls.h> instead of <doscalls.h> +* 12-06-90 SRW Added _CRUISER_ and _WIN32 conditionals. +* 01-21-91 GJF ANSI naming. +* 04-26-91 SRW Implemented fstat for _WIN32_ and removed level 3 +* warnings. +* 02-13-92 GJF Replaced _nfile by _nhandle for Win32. +* 05-27-92 SKS File Creation and File Last Access timestamps may be 0 +* on some file systems (e.g. FAT) in which case the +* File Last Write time should be used instead. +* 06-04-92 SKS Changed comment that used to say "This is a BUG!" +* to explain that this value cannot be computed on +* OS/2 or NT. Only MS-DOS provides this functionality. +* The drive number is not valid for UNC names. +* 06-25-92 GJF Use GetFileInformationByHandle API, also cleaned up +* formatting of Win32 verson [_WIN32_]. +* 08-18-92 SKS Add a call to FileTimeToLocalFileTime +* as a temporary fix until _dtoxtime takes UTC +* 08-20-92 GJF Merged two changes above. +* 12-16-92 GJF Win32 GetFileInformationByHandle API doesn't like +* device or pipe handles. Use _S_IFIFO for pipes. +* 04-06-93 GJF Made computation of file times consistent with _stat(). +* +*******************************************************************************/ + +#include <cruntime.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <errno.h> +#include <msdos.h> +#include <dostypes.h> +#include <io.h> +#include <internal.h> +#include <stddef.h> +#include <oscalls.h> +#include <stdio.h> +#include <os2dll.h> + +#ifndef _CRUISER_ +#include <time.h> +#endif + +#define IO_DEVNBR 0x3f + +/*** +*int _fstat(fildes, buf) - fills supplied buffer with status info +* +*Purpose: +* Fills the supplied buffer with status information on the +* file represented by the specified file designator. +* WARNING: the dev/rdev fields are zero for files. This is +* incompatible with DOS 3 version of this routine. +* +*Entry: +* int fildes - file descriptor +* struct stat *buf - buffer to store result in +* +*Exit: +* fills in buffer pointed to by buf +* returns 0 if successful +* returns -1 and sets errno if unsuccessful +* +*Exceptions: +* +*******************************************************************************/ + +#ifdef _CRUISER_ + +int _CRTAPI1 _fstat ( + REG2 int fildes, + REG1 struct _stat *buf + ) +{ + + long cpos; + int isdev; /* 0 for a file, 1 for a device */ + int retval = 0; /* assume good return */ + if (fildes < 0 || fildes >= _nfile) { + errno = EBADF; + return(-1); + } + + /* Lock the file */ + + _lock_fh(fildes); + + /* Issue the get-device-info call. */ + { + int descrip; /* device descriptor word */ + + if (DOSQUERYHTYPE(fildes, (unsigned *)&isdev, (unsigned *)&descrip)) + { + errno = EBADF; + retval = -1; /* error from DOS call - bad file designator */ + goto done; /* join common return code */ + } + + /* set the common fields */ + + buf->st_ino = buf->st_uid = buf->st_gid = buf->st_mode = 0; + buf->st_nlink = 1; + + buf->st_mode |= (_osfile[fildes] & FRDONLY) + ? (_S_IREAD + (_S_IREAD >> 3) + (_S_IREAD >> 6)) + : ((_S_IREAD|_S_IWRITE) + + ((_S_IREAD|_S_IWRITE) >> 3) + + ((_S_IREAD|_S_IWRITE) >> 6)); + + /* set file date fields - NOTE for code below, it should be + * remembered that calls to QFILEINFO cannot fail since the file + * handle is known to be good since we got by the QHANDTYPE call. + */ + + { + FILESTATUS fs; + + (void)DOSQUERYFILEINFO(fildes, 1, (FILESTATUS *) & fs, sizeof(fs)); + + buf->st_mtime = XTIME(fs.fdateLastWrite, fs.ftimeLastWrite); + + if ( _DATECAST(fs.fdateLastAccess) || _TIMECAST(fs.ftimeLastAccess) ) + buf->st_atime = XTIME(fs.fdateLastAccess, fs.ftimeLastAccess); + else + buf->st_atime = buf->st_mtime ; + + if ( _DATECAST(fs.fdateCreation) || _TIMECAST(fs.ftimeCreation) ) + buf->st_ctime = XTIME(fs.fdateCreation, fs.ftimeCreation); + else + buf->st_ctime = buf->st_mtime ; + + buf->st_mtime = XTIME(fs.fdateLastWrite, fs.ftimeLastWrite); + } + + /* check for device or file */ + + if (isdev & 0xFF) { + /* file designator refers to a device - set file size to 0 */ + + buf->st_size = 0; + buf->st_mode |= _S_IFCHR; + buf->st_rdev = buf->st_dev = (_dev_t)fildes; + } + else { + /* file designator refers to a file - set actual file size */ + + cpos = _lseek_lk(fildes, 0L, 1); + buf->st_size = _lseek_lk(fildes, 0L, 2); + _lseek_lk(fildes, cpos, 0); + + buf->st_mode |= _S_IFREG; + + /* + * On DOS, this field contains the drive number, but + * the drive number is not available on this platform. + * Also, for UNC network names, there is no drive number. + */ + buf->st_rdev = buf->st_dev = 0; + } + +/* Common return code */ + +done: + _unlock_fh(fildes); + return(retval); +} + + +#else /* ndef _CRUISER_ */ + +#ifdef _WIN32_ + + +int _CRTAPI1 _fstat ( + int fildes, + struct _stat *buf + ) +{ + int isdev; /* 0 for a file, 1 for a device */ + int retval = 0; /* assume good return */ + BY_HANDLE_FILE_INFORMATION bhfi; + SYSTEMTIME SystemTime; + + if ( (unsigned)fildes >= (unsigned)_nhandle ) { + errno = EBADF; + return(-1); + } + + /* Lock the file */ + + _lock_fh(fildes); + + /* Find out what kind of handle underlies filedes + */ + isdev = GetFileType((HANDLE)_osfhnd[fildes]) & ~FILE_TYPE_REMOTE; + + if ( isdev != FILE_TYPE_DISK ) { + + /* not a disk file. probably a device or pipe + */ + if ( (isdev == FILE_TYPE_CHAR) || (isdev == FILE_TYPE_PIPE) ) { + /* treat pipes and devices similarly. no further info is + * available from any API, so set the fields as reasonably + * as possible and return. + */ + if ( isdev == FILE_TYPE_CHAR ) + buf->st_mode = _S_IFCHR; + else + buf->st_mode = _S_IFIFO; + + buf->st_rdev = buf->st_dev = (_dev_t)fildes; + buf->st_nlink = 1; + buf->st_uid = buf->st_gid = buf->st_ino = 0; + buf->st_atime = buf->st_mtime = buf->st_ctime = buf->st_size + = 0; + + goto done; + + } + else if ( isdev == FILE_TYPE_UNKNOWN ) { + errno = EBADF; + retval = -1; + goto done; /* join common return code */ + } + else { + /* according to the documentation, this cannot happen, but + * play it safe anyway. + */ + _dosmaperr(GetLastError()); + retval = -1; + goto done; + } + } + + + /* set the common fields + */ + buf->st_ino = buf->st_uid = buf->st_gid = buf->st_mode = 0; + buf->st_nlink = 1; + + /* use the file handle to get all the info about the file + */ + if ( !GetFileInformationByHandle((HANDLE)_osfhnd[fildes], &bhfi) ) { + _dosmaperr(GetLastError()); + retval = -1; + goto done; + } + + if ( bhfi.dwFileAttributes & FILE_ATTRIBUTE_READONLY ) + buf->st_mode |= (_S_IREAD + (_S_IREAD >> 3) + (_S_IREAD >> 6)); + else + buf->st_mode |= ((_S_IREAD|_S_IWRITE) + ((_S_IREAD|_S_IWRITE) >> 3) + + ((_S_IREAD|_S_IWRITE) >> 6)); + + /* set file date fields + */ + FileTimeToSystemTime( &(bhfi.ftLastWriteTime), &SystemTime ); + + buf->st_mtime = __gmtotime_t(SystemTime.wYear, + SystemTime.wMonth, + SystemTime.wDay, + SystemTime.wHour, + SystemTime.wMinute, + SystemTime.wSecond + ); + + if ( bhfi.ftLastAccessTime.dwLowDateTime || bhfi.ftLastAccessTime. + dwHighDateTime ) { + + FileTimeToSystemTime( &(bhfi.ftLastAccessTime), &SystemTime ); + + buf->st_atime = __gmtotime_t(SystemTime.wYear, + SystemTime.wMonth, + SystemTime.wDay, + SystemTime.wHour, + SystemTime.wMinute, + SystemTime.wSecond + ); + } + else + buf->st_atime = buf->st_mtime; + + if ( bhfi.ftCreationTime.dwLowDateTime || bhfi.ftCreationTime. + dwHighDateTime ) { + + FileTimeToSystemTime( &(bhfi.ftCreationTime), &SystemTime ); + + buf->st_ctime = __gmtotime_t(SystemTime.wYear, + SystemTime.wMonth, + SystemTime.wDay, + SystemTime.wHour, + SystemTime.wMinute, + SystemTime.wSecond + ); + } + else + buf->st_ctime = buf->st_mtime; + + + buf->st_size = bhfi.nFileSizeLow; + + buf->st_mode |= _S_IFREG; + + /* On DOS, this field contains the drive number, but + * the drive number is not available on this platform. + * Also, for UNC network names, there is no drive number. + */ + buf->st_rdev = buf->st_dev = 0; + +/* Common return code */ + +done: + _unlock_fh(fildes); + return(retval); +} + +#else /* ndef _WIN32_ */ + +#error ERROR - ONLY CRUISER OR WIN32 TARGET SUPPORTED! + +#endif /* _WIN32_ */ + +#endif /* _CRUISER_ */ |