Add these lines to build.gradle : apply plugin: ‘java’ test { dependsOn cleanTest testLogging.showStandardStreams = true } Notice: dependsOn cleanTest is not necessary but if not used, you need to run cleanTest or clean task before test task. Edit: A better approach: apply plugin: ‘java’ test { testLogging { outputs.upToDateWhen {false} showStandardStreams = true } … Read more
I see that this is a rather old post but just in case someone is still searching for a way to do this: proc = subprocess.Popen([“ping”, “localhost”], stdout=subprocess.PIPE, stderr=subprocess.PIPE) with open(“logfile.txt”, “w”) as log_file: while proc.poll() is None: line = proc.stderr.readline() if line: print “err: ” + line.strip() log_file.write(line) line = proc.stdout.readline() if line: print … Read more
$stdout is a global variable that represents the current standard output. STDOUT is a constant representing standard output and is typically the default value of $stdout. With STDOUT being a constant, you shouldn’t re-define it, however, you can re-define $stdout without errors/warnings (re-defining STDOUT will raise a warning). for example, you can do: $stdout = … Read more
Calling perror will give you the interpreted value of errno, which is a thread-local error value written to by POSIX syscalls (i.e., every thread has it’s own value for errno). For instance, if you made a call to open(), and there was an error generated (i.e., it returned -1), you could then call perror immediately … Read more
you can use this syntax to redirect all output stderr and stdout to stdout.txt <cmd> <args> > allout.txt 2>&1
If all you need is the stdout output, then take a look at subprocess.check_output(): import subprocess batcmd=”dir” result = subprocess.check_output(batcmd, shell=True) Because you were using os.system(), you’d have to set shell=True to get the same behaviour. You do want to heed the security concerns about passing untrusted arguments to your shell. If you need to … Read more
I found this to be the only one short, flexible, portable and readable: import sys def eprint(*args, **kwargs): print(*args, file=sys.stderr, **kwargs) The optional function eprint saves some repetition. It can be used in the same way as the standard print function: >>> print(“Test”) Test >>> eprint(“Test”) Test >>> eprint(“foo”, “bar”, “baz”, sep=”—“) foo—bar—baz
Your DOS command 2> nul Read page Using command redirection operators. Besides the “2>” construct mentioned by Tanuki Software, it lists some other useful combinations.
There is also process substitution. Which makes a process substitute for a file. You can send stderr to a file as follows: process1 2> file But you can substitute a process for the file as follows: process1 2> >(process2) Here is a concrete example that sends stderr to both the screen and appends to a … Read more
The syntax is almost the same as printf. With printf you give the string format and its contents ie: printf(“my %s has %d chars\n”, “string format”, 30); With fprintf it is the same, except now you are also specifying the place to print to: FILE *myFile; … fprintf( myFile, “my %s has %d chars\n”, “string … Read more