system() simply passes its argument to the shell (on Unix-like systems, usually /bin/sh). Try this: int a = system(“python -m plotter &”); Of course the value returned by system() won’t be the exit status of the python script, since it won’t have finished yet. This is likely to work only on Unix-like systems (probably including … Read more
Environment variables are specific to the operating system. Properties are JVM only.
Both Debian and Ubuntu ship with pam_umask. This allows you to configure umask in /etc/login.defs and have them apply system-wide, regardless of how a user logs in. To enable it, you may need to add a line to /etc/pam.d/common-session reading session optional pam_umask.so or it may already be enabled. Then edit /etc/login.defs and change the … Read more
In Windows, you can execute the net stats srv command, and in Unix, you can execute the uptime command. Each output must be parsed to acquire the uptime. This method automatically executes the necessary command by detecting the user’s operating system. Note that neither operation returns uptime in millisecond precision. public static long getSystemUptime() throws … Read more
You can get the localized display name with the SHGetFileInfo API: public static string GetDisplayName(Environment.SpecialFolder specialFolder) { IntPtr pidl = IntPtr.Zero; try { HResult hr = SHGetFolderLocation(IntPtr.Zero, (int) specialFolder, IntPtr.Zero, 0, out pidl); if (hr.IsFailure) return null; SHFILEINFO shfi; if (0 != SHGetFileInfo( pidl, FILE_ATTRIBUTE_NORMAL, out shfi, (uint)Marshal.SizeOf(typeof(SHFILEINFO)), SHGFI_PIDL | SHGFI_DISPLAYNAME)) { return shfi.szDisplayName; } … Read more
system() starts a new process. This new process changes its current directory, then ends. The current directory of your program’s process does not change. You want chdir() (or _chdir()).
We experienced the same Problem with Java 7 Update 45 (1.7.0_45). The JNLP Spec gave a hint for a work-around: Properties set in the jnlp file will normally be set by Java Web Start after the VM is started but before the application is invoked. Some properties are considered “secure” properties and can be passed … Read more
From Perlfaq8: You’re confusing the purpose of system() and backticks (“). system() runs a command and returns exit status information (as a 16 bit value: the low 7 bits are the signal the process died from, if any, and the high 8 bits are the actual exit value). Backticks (“) run a command and return … Read more
Maybe the easiest way is. Get the DeviceId Nuget package And use it like string deviceId = new DeviceIdBuilder() .AddMachineName() .AddMacAddress() .AddProcessorId() .AddMotherboardSerialNumber() .ToString(); You can personalize the info used to generate the ID Github Project
First read: Concurrency vs Parallelism – What is the difference? Concurrency is the separation of tasks to provide interleaved execution. Parallelism is the simultaneous execution of multiple pieces of work in order to increase speed. —https://github.com/servo/servo/wiki/Design Short answer: With threads, the operating system switches running threads preemptively according to its scheduler, which is an algorithm … Read more