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Diffstat (limited to 'private/crt32/dos/drive.c')
| -rw-r--r-- | private/crt32/dos/drive.c | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/private/crt32/dos/drive.c b/private/crt32/dos/drive.c new file mode 100644 index 000000000..02b85263b --- /dev/null +++ b/private/crt32/dos/drive.c @@ -0,0 +1,208 @@ +/*** +*drive.c - get and change current drive +* +* Copyright (c) 1989-1995, Microsoft Corporation. All rights reserved. +* +*Purpose: +* This file has the _getdrive() and _chdrive() functions +* +*Revision History: +* 06-06-89 PHG Module created, based on asm version +* 03-07-90 GJF Made calling type _CALLTYPE1, added #include +* <cruntime.h> and fixed copyright. Also, cleaned up +* the formatting a bit. +* 07-24-90 SBM Removed '32' from API names +* 09-27-90 GJF New-style function declarators. +* 12-04-90 SRW Changed to include <oscalls.h> instead of <doscalls.h> +* 12-06-90 SRW Added _CRUISER_ and _WIN32 conditionals. +* 05-10-91 GJF Fixed off-by-1 error in Win32 version and updated the +* function descriptions a bit [_WIN32_]. +* 05-19-92 GJF Revised to use the 'current directory' environment +* variables of Win32/NT. +* 06-09-92 GJF Use _putenv instead of Win32 API call. Also, defer +* adding env var until after the successful call to +* change the dir/drive. +* 04-06-93 SKS Replace _CRTAPI* with __cdecl +* 11-24-93 CFW Rip out Cruiser. +* 11-24-93 CFW No longer store current drive in CRT env strings. +* 02-08-95 JWM Spliced _WIN32 & Mac versions. +* +*******************************************************************************/ + +#ifdef _WIN32 + +#include <cruntime.h> +#include <oscalls.h> +#include <os2dll.h> +#include <internal.h> +#include <msdos.h> +#include <errno.h> +#include <ctype.h> +#include <stdlib.h> +#include <string.h> + + +/*** +*int _getdrive() - get current drive (1=A:, 2=B:, etc.) +* +*Purpose: +* Returns the current disk drive +* +*Entry: +* No parameters. +* +*Exit: +* returns 1 for A:, 2 for B:, 3 for C:, etc. +* returns 0 if current drive cannot be determined. +* +*Exceptions: +* +*******************************************************************************/ + +int __cdecl _getdrive ( + void + ) +{ + ULONG drivenum; + UCHAR curdirstr[_MAX_PATH]; + + drivenum = 0; + if (GetCurrentDirectory(sizeof(curdirstr), curdirstr)) + if (curdirstr[1] == ':') + drivenum = toupper(curdirstr[0]) - 64; + + return drivenum; +} + + +/*** +*int _chdrive(int drive) - set the current drive (1=A:, 2=B:, etc.) +* +*Purpose: +* Allows the user to change the current disk drive +* +*Entry: +* drive - the number of drive which should become the current drive +* +*Exit: +* returns 0 if successful, else -1 +* +*Exceptions: +* +*******************************************************************************/ + +int __cdecl _chdrive ( + int drive + ) +{ + char newdrive[3]; + + if (drive < 1 || drive > 31) { + errno = EACCES; + _doserrno = ERROR_INVALID_DRIVE; + return -1; + } + + _mlock(_ENV_LOCK); + + newdrive[0] = (char)('A' + (char)drive - (char)1); + newdrive[1] = ':'; + newdrive[2] = '\0'; + + /* + * Set new drive. If current directory on new drive exists, it + * will become the cwd. Otherwise defaults to root directory. + */ + + if ( SetCurrentDirectory((LPSTR)newdrive) ) { + _munlock(_ENV_LOCK); + return 0; + } + else { + _dosmaperr(GetLastError()); + _munlock(_ENV_LOCK); + return -1; + } +} + +#else /* ndef _WIN32 */ + +#include <cruntime.h> +#include <ctype.h> +#include <stdlib.h> +#include <macos\osutils.h> +#include <macos\files.h> +#include <macos\errors.h> + +/*** +*int _getdrive() - get current drive (-1=BootDisk, -2=Second mounted drive, etc.) +* +*Purpose: +* Returns the current disk drive +* +*Entry: +* No parameters. +* +*Exit: +* returns 1 for BootDisk, 2 for Second mounted drive, etc. +* returns 0 if current drive cannot be determined. +* +*Exceptions: +* +*******************************************************************************/ + +int _CALLTYPE1 _getdrive ( + void + ) +{ + OSErr osErr; + WDPBRec wdPB; + char st[256]; + + wdPB.ioNamePtr = &st[0]; + osErr = PBHGetVolSync(&wdPB); + if (osErr) { + return 0; + } + + + return wdPB.ioWDVRefNum; +} + + +/*** +*int _chdrive(int drive) - set the current drive (-1=BootDisk, -2=Second drive, etc.) +* +*Purpose: +* Allows the user to change the current disk drive +* +* +*Entry: +* drive - the number of drive which should become the current drive +* +*Exit: +* returns 0 if successful, else -1 +* +*Exceptions: +* +*******************************************************************************/ + +int _CALLTYPE1 _chdrive ( + int drive + ) +{ + OSErr osErr; + WDPBRec wdPB; + + wdPB.ioNamePtr = NULL; + wdPB.ioWDDirID = 0; + wdPB.ioVRefNum = drive; + osErr = PBHSetVolSync(&wdPB); + if (osErr) { + return -1; + } + + return 0; +} + +#endif /* _WIN32 */ |