Re: [DUG] CreateProcess
This may help:
C:\Documents and Settings\Alistercmd /?
Starts a new instance of the Windows XP command interpreter
CMD [/A | /U] [/Q] [/D] [/E:ON | /E:OFF] [/F:ON | /F:OFF] [/V:ON |
/V:OFF]
[[/S] [/C | /K] string]
/C Carries out the command specified by string and then terminates
/K Carries out the command specified by string but remains
/S Modifies the treatment of string after /C or /K (see below)
/Q Turns echo off
/D Disable execution of AutoRun commands from registry (see below)
/A Causes the output of internal commands to a pipe or file to be
ANSI
/U Causes the output of internal commands to a pipe or file to be
Unicode
/T:fg Sets the foreground/background colors (see COLOR /? for more
info)
/E:ON Enable command extensions (see below)
/E:OFF Disable command extensions (see below)
/F:ON Enable file and directory name completion characters (see below)
/F:OFF Disable file and directory name completion characters (see
below)
/V:ON Enable delayed environment variable expansion using ! as the
delimiter. For example, /V:ON would allow !var! to expand the
variable var at execution time. The var syntax expands
variables
at input time, which is quite a different thing when inside of
a FOR
loop.
/V:OFF Disable delayed environment expansion.
Note that multiple commands separated by the command separator
''
are accepted for string if surrounded by quotes. Also, for
compatibility
reasons, /X is the same as /E:ON, /Y is the same as /E:OFF and /R is the
same as /C. Any other switches are ignored.
If /C or /K is specified, then the remainder of the command line after
the switch is processed as a command line, where the following logic is
used to process quote (") characters:
1. If all of the following conditions are met, then quote
characters
on the command line are preserved:
- no /S switch
- exactly two quote characters
- no special characters between the two quote characters,
where special is one of: ()@^|
- there are one or more whitespace characters between the
the two quote characters
- the string between the two quote characters is the name
of an executable file.
2. Otherwise, old behavior is to see if the first character is
a quote character and if so, strip the leading character and
remove the last quote character on the command line, preserving
any text after the last quote character.
If /D was NOT specified on the command line, then when CMD.EXE starts,
it
looks for the following REG_SZ/REG_EXPAND_SZ registry variables, and if
either or both are present, they are executed first.
HKEY_LOCAL_MACHINE\Software\Microsoft\Command Processor\AutoRun
and/or
HKEY_CURRENT_USER\Software\Microsoft\Command Processor\AutoRun
Command Extensions are enabled by default. You may also disable
extensions for a particular invocation by using the /E:OFF switch. You
can enable or disable extensions for all invocations of CMD.EXE on a
machine and/or user logon session by setting either or both of the
following REG_DWORD values in the registry using REGEDT32.EXE:
HKEY_LOCAL_MACHINE\Software\Microsoft\Command
Processor\EnableExtensions
and/or
HKEY_CURRENT_USER\Software\Microsoft\Command
Processor\EnableExtensions
to either 0x1 or 0x0. The user specific setting takes precedence over
the machine setting. The command line switches take precedence over the
registry settings.
The command extensions involve changes and/or additions to the following
commands:
DEL or ERASE
COLOR
CD or CHDIR
MD or MKDIR
PROMPT
PUSHD
POPD
SET
SETLOCAL
ENDLOCAL
IF
FOR
CALL
SHIFT
GOTO
START (also includes changes to external command invocation)
ASSOC
FTYPE
To get specific details, type commandname /? to view the specifics.
Delayed environment variable expansion is NOT enabled by default. You
can enable or disable delayed environment variable expansion for a
particular invocation of CMD.EXE with the /V:ON or /V:OFF switch. You
can enable or disable completion for all invocations of CMD.EXE on a
machine and/or user logon session by setting either or both of the
following REG_DWORD values in the registry using REGEDT32.EXE:
HKEY_LOCAL_MACHINE\Software\Microsoft\Command
Processor\DelayedExpansion
and/or
HKEY_CURRENT_USER\Software\Microsoft\Command
Processor\DelayedExpansion
to either 0x1 or 0x0. The user specific setting takes precedence over
the machine setting. The command line switches take precedence over the
registry settings.
If delayed environment variable expansion is enabled, then the
exclamation
character can be used to substitute the value of an environment variable
at execution time.
File and Directory name completion is NOT enabled by default. You can
enable or disable file name completion for a particular invocation of
CMD.EXE with the /F:ON or /F:OFF switch. You can enable or disable
completion for all invocations of CMD.EXE on a machine and/or user logon
session by setting either or both of the following REG_DWORD values in
the registry using REGEDT32.EXE:
RE: [DUG] CreateProcess
Cmd /c is from the help:
Starts a new instance of the Windows XP command interpreter
CMD [/A | /U] [/Q] [/D] [/E:ON | /E:OFF] [/F:ON | /F:OFF] [/V:ON | /V:OFF]
[[/S] [/C | /K] string]
/C Carries out the command specified by string and then terminates
/K Carries out the command specified by string but remains
You have to be aware when its needed and when it isn't. For instance I
usually use ShellExecute, and if the command has the .BAT on the end and the
windows assocation for running a .BAT extension is in place then it make the
association with CMD itself. Specifying CMD/C will remove any uncertainty.
Remember if you run such a command on Windows 9x or ME then you need to use
instead COMMAND/C
John
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Robert martin
Sent: Thursday, 26 October 2006 11:10 a.m.
To: [EMAIL PROTECTED]; NZ Borland Developers Group - Delphi List
Subject: Re: [DUG] CreateProcess
Hi
You are the man Laurie. That seems to work great now!
btw what does the /c do?
Rob Martin
Software Engineer
phone +64 03 377 0495
fax +64 03 377 0496
web www.chreos.com
Wild Software Ltd
lbisman wrote:
Should that pChar string be 'cmd /c MySQLExport.bat' as it's the
command interpreter that usually runs batch files...
Laurie..
- Original Message Follows -
Hi
I am trying to use create process to run a batch file.
The batch file exports a MySQL DB to a file. The batch
file runs but the file is 0kb however if run that batch
file normally (not from CreateProcess) the file is
correctly created (about 2MB). The code I am using is
shown below, does anyone have any idea as to what I am
doing wrong?
var
proc_info : TProcessInformation;
startinfo : TStartupInfo;
ExitCode : longword;
begin
Result := False;
// Initialize the structures
FillChar(proc_info, sizeof(TProcessInformation), 0);
FillChar(startinfo, sizeof(TStartupInfo), 0);
startinfo.cb := sizeof(TStartupInfo);
// Attempts to create the process
if (CreateProcess(Nil,
pChar('MySQLExport.bat'),
nil,
nil,
false,
NORMAL_PRIORITY_CLASS,
nil,
pChar(AppDir),
startinfo,
proc_info) False) then begin
// Process created, now s wait till it ends...
WaitForSingleObject(proc_info.hProcess, INFINITE);
GetExitCodeProcess(proc_info.hProcess, ExitCode);
CloseHandle(proc_info.hThread);
CloseHandle(proc_info.hProcess);
Sleep(5000); //Wait 5secs just to allow any
windows cleanup or other to finish
if (FileExists(AppDir + BASE_FILE) = True) then begin
if (CreateZipFile = True) then begin
Result := True;
end;
end;
end;
end;
--
Rob Martin
Software Engineer
phone +64 03 377 0495
fax +64 03 377 0496
web www.chreos.com
Wild Software Ltd
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Laurie..
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Re: [DUG] CreateProcess
Should that pChar string be 'cmd /c MySQLExport.bat' as it's
the command interpreter that usually runs batch files...
Laurie..
- Original Message Follows -
Hi
I am trying to use create process to run a batch file.
The batch file exports a MySQL DB to a file. The batch
file runs but the file is 0kb however if run that batch
file normally (not from CreateProcess) the file is
correctly created (about 2MB). The code I am using is
shown below, does anyone have any idea as to what I am
doing wrong?
var
proc_info : TProcessInformation;
startinfo : TStartupInfo;
ExitCode : longword;
begin
Result := False;
// Initialize the structures
FillChar(proc_info, sizeof(TProcessInformation), 0);
FillChar(startinfo, sizeof(TStartupInfo), 0);
startinfo.cb := sizeof(TStartupInfo);
// Attempts to create the process
if (CreateProcess(Nil,
pChar('MySQLExport.bat'),
nil,
nil,
false,
NORMAL_PRIORITY_CLASS,
nil,
pChar(AppDir),
startinfo,
proc_info) False) then begin
// Process created, now s wait till it ends...
WaitForSingleObject(proc_info.hProcess, INFINITE);
GetExitCodeProcess(proc_info.hProcess, ExitCode);
CloseHandle(proc_info.hThread);
CloseHandle(proc_info.hProcess);
Sleep(5000); //Wait 5secs just to allow any
windows cleanup or other to finish
if (FileExists(AppDir + BASE_FILE) = True) then
begin
if (CreateZipFile = True) then begin
Result := True;
end;
end;
end;
end;
--
Rob Martin
Software Engineer
phone +64 03 377 0495
fax +64 03 377 0496
web www.chreos.com
Wild Software Ltd
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Delphi mailing list
Delphi@ns3.123.co.nz
http://ns3.123.co.nz/mailman/listinfo/delphi
Laurie..
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Delphi@ns3.123.co.nz
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