I'm using a Perl script to run SQL*Plus and then sending a command to the program to create a pfile from the SP file. I want the command to run without outputting anything to the terminal. Running sqlplus in silent mode (sqlplus -s) suppresses most of the terminal output when calling sqlplus, but creating the pfile still outputs a 'File created' to the terminal regardless. How can I suppress this output?
Running set feedback off will suppress the 'File created' output in the terminal. If you are running a SQL script when calling SQL*Plus, adding that line before the create pfile line will suppress the output as well.
Related
In PyCharm you can set the command line parameters you want to test in your program in Run|Configurations. Where is this hidden in VSCODE? And I assume it does not exist in Wing?
Project| [filename] properties
click on Debug
Enter the command line on the Script Arguments line/
What's the Windows batch file equivalent of set -o errexit in a bash script?
I have a long batch file filled with different programs to run on Windows command line... basically its an unrolled make file with every compiler command that needs to be run to build an exe in a long sequence of commands.
The problem with this method is that I want it to exit the batch command on the first non-zero return code generate by a command in the script.
As far as I know, Windows batch files have a problem where they don't automatically exit on the first error without adding a lot of repetitive boilerplate code between each command to check for a non-zero return code and to exit the script.
What I'm wondering about, is there an option similar to bash's set -o errexit for Windows cmd.exe? or perhaps a technique that works to eliminate too much boilerplate error checking code... like you set it up once and then it automatically exits if a command returns a non-zero return code without adding a bunch of junk to your script to do this for you.
(I would accept PowerShell option as well instead of cmd.exe, except PowerShell isn't very nice with old-unix-style command flags like: -dontbreak -y ... breaking those commands without adding junk to your command line like quotes or escape characters... not really something I want to mess around with either...)
CMD/Batch
As Ken mentioned in the comments, CMD does not have an equivalent to the bash option -e (or the equivalent -o errexit). You'd have to check the exit status of each command, which is stored in the variable %errorlevel% (equivalent to $? in bash). Something like
if %errorlevel% neq 0 then exit /b %errorlevel%
PowerShell
PowerShell already automatically terminates script execution on errors in most cases. However, there are two error classes in PowerShell: terminating and non-terminating. The latter just displays an error without terminating script execution. The behavior can be controlled via the variable $ErrorActionPreference:
$ErrorActionPreference = 'Stop': terminate on all errors (terminating and non-terminating)
$ErrorActionPreference = 'Continue' (default): terminate on terminating errors, continue on non-terminating errors
$ErrorActionPreference = 'SilentlyContinue': don't terminate on any error
PowerShell also allows more fine-grained error handling via try/catch statements:
try {
# run command here
} catch [System.SomeException] {
# handle exception of a specific type
} catch [System.OtherException] {
# handle exception of a different type
} catch {
# handle all other exceptions
} finally {
# cleanup statements that are run regardless of whether or not
# an exception was thrown
}
I am debugging a windows process that crashes if the execution stops for even a few milliseconds. (I don't know how many exactly, but it is definitely less than the time taken by my reflexes to resume the process.)
I know I can launch a windbg session via the command prompt by typing in windbg -p PID which brings up the GUI. But can I then further pass it windbg commands via the command prompt, such as bm *foo!bar* ".frame;gc";g".
Because If I can pass it these commands I can write these down in a .bat file and just run it. There would at least be no delay due to entering (or even copy-pasting) the commands.
Use the -c parameter to pass them:
windbg -p PID -c "bm *foo!bar* .frame;gc;g"
According to the help (found by running windbg /?):
-c "command"
Specifies the initial debugger command to run at start-up. This command must be enclosed in quotation marks. Multiple commands can be separated with semicolons. (If you have a long command list, it may be easier to put them in a script and then use the -c option with the $<, $><, $><, $$>< (Run Script File) command.)
If you are starting a debugging client, this command must be intended for the debugging server. Client-specific commands, such as .lsrcpath, are not allowed.
You may need to play around with the quotes...
Edit: Based on this answer, you might be better off putting the commands into a script file to deal with the quotes:
script.txt (I think this is what you want):
bm *foo!bar* ".frame;gc"
g
Then in your batch file:
windbg -p PID -c "$<full_path_to_script_txt"
I have to run cmd / c from a program, run the start command xx.exe, and I capture the result (there xx.exe?). until everything is right, however, remains open the console with the error popup. how can I close the console with the error?
Usually win32 applications will close the command prompt after execution. If this isn't the case with what you're trying to run, you could:
Run it from Windows "Run" option (Windows button+R) than your program name and path in prompt.
Run it from a batch file, like so:
runMe.bat:
START "" "C:\windows\notepad.exe"
EXIT`
Than just run runMe.bat from wherever. Notice the 'exit' command that closes the command prompt after execution.
Read more about batch files, the start command, and this issue here, and there.
Good luck!
Does ipython have a setting similar to '-e' in bash that stops the execution of the script if any ipython's shell command returns a non-zero value?
Not directly, no. However, after a !foo shell command, the exit code is stored as the value _exit_code. So your script could check that and throw an error.
For some reason, on my system it multiplies all the exit codes by 256. I'm not at all sure why it's doing that.