ExecDos plug-in: Difference between revisions
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'''Telnet and ssh''' Plug-in | '''Telnet and ssh''' Plug-in doesn't work with applications requiring terminal emulation. | ||
[[Category:Plugins]] | [[Category:Plugins]] |
Revision as of 00:02, 4 September 2006
Author: Takhir (talk, contrib) |
Links
Download:
ExecDos.zip (40 KB)
Forum thread
Description
Plug-in works with console applications - creates hidden child process with redirected i/o. Compare to nsExec has four add-ons:
- string parameter that serves as stdin for running application - may be useful if you want to give login/password to running application;
- sync/async (background) process launch option - async is good for long running applications;
- it works out of section - for .onInit check outs;
- multithreading - allows to run few applications at the same time.
Plug-in puts stdout/log to stack or log file (if valid file name defined in the command line) instead of 'detailed' installer window like nsExec does, output size is limited with disk free space only. Maximum input (stdin) string size (i.e. plug-in second parameter) is up to 8kB in the special NSIS build, 1 kB otherwise. The same with output lines length if /TOSTACK option defined.
'exec' return code depends on the execution mode: application exit code for sync mode and control thread handle for async one. Handle required for 'wait' - it helps to understand what application exit to wait for. If stack is not used between 'exec' and 'wait', both Pop after 'exec' and 'wait' parameter may be skipped - handle just sits in the stack.
Syntax
"exec" DLL function
ExecDos::exec [/NOUNLOAD /ASYNC] [/TOSTACK] [/TIMEOUT=xxx] application_to_run [stdin_string] [log_file_name]
- Executes console application.
- ASYNC
- Not waits for process exit. Use 'wait' call if you want to get exit code. (/NOUNLOAD is mandatory!)
- TIMEOUT
- TOTAL execution time, milliseconds, for example /TIMEOUT=10000. Default is big enough. Short timeouts may cause app to be terminated.
- TOSTACK
- pushes output to stack instead of log_file (do not use log_file_name parameter with this option). May be confusing if few apps puts lines to stack in the async mode.
- application_to_run
- application to run.
- stdin_string
- all that application can get from stdin (optional, use "" if stack is not empty)
- log_file_name
- file where to put app's stdout (optional, but use "" if stack is not empty)
"wait" DLL function
ExecDos::wait handle
- Waits for process exit.
- handle
- Control thread handle returned by 'exec' call in the /ASYNC mode.
Example
Sync execution:
ExecDos::exec /TIMEOUT=2000 "$EXEDIR\consApp.exe" "test_login$\ntest_pwd$\n" "$EXEDIR\execdos.log" Pop $0 # return value MessageBox MB_OK "Exit code $0"
Async execution:
ExecDos::exec /NOUNLOAD /ASYNC "$EXEDIR\consApp.exe" "test_login$\ntest_pwd$\n" "$EXEDIR\execdos.log" Pop $0 # thread handle for wait # you can add some installation code here to execute while application is running. ExecDos::wait $0 Pop $0 # return value MessageBox MB_OK "Exit code $0"
BAT files specifics. On some of Win98 systems where "Close on exit" option is not set for DOS apps it was found
that after batch execution was finished (and installer continue it's job) hidden window still remains in the system
as "winoldapp". Following two lines solve the problem
@echo off # place your code here cls
Telnet and ssh Plug-in doesn't work with applications requiring terminal emulation.