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A set of helpers for the POSIX module. Raw interfaces are in the other posix*.nim files.
Uname = object
sysname*, nodename*, release*, version*, machine*: string
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proc fsync(fd: int) {....raises: [OSError], tags: [], forbids: [].}
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synchronize a file's buffer cache to the storage device
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proc memoryLock(a1: pointer; a2: int) {....raises: [OSError], tags: [], forbids: [].}
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Locks pages starting from a1 for a1 bytes and prevent them from being swapped.
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proc memoryLockAll(flags: int) {....raises: [OSError], tags: [], forbids: [].}
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Locks all memory for the running process to prevent swapping.
example:
memoryLockAll(MCL_CURRENT or MCL_FUTURE)
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proc memoryUnlock(a1: pointer; a2: int) {....raises: [OSError], tags: [],
forbids: [].}
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Unlock pages starting from a1 for a1 bytes and allow them to be swapped.
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proc memoryUnlockAll() {....raises: [OSError], tags: [], forbids: [].}
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Unlocks all memory for the running process to allow swapping.
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proc mkdtemp(prefix: string): string {....raises: [OSError], tags: [], forbids: [].}
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Creates a unique temporary directory from a prefix string. Adds a six chars suffix. The directory is created with permissions 0700. Returns the directory name.
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proc mkstemp(prefix: string; suffix = ""): (string, File) {....raises: [OSError],
tags: [], forbids: [].}
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Creates a unique temporary file from a prefix string. A six-character string will be added. If suffix is provided it will be added to the string The file is created with perms 0600. Returns the filename and a file opened in r/w mode.
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proc osReleaseFile(): Config {....raises: [IOError, OSError, Exception, ValueError,
KeyError], tags: [ReadDirEffect,
WriteIOEffect, ReadIOEffect, RootEffect], forbids: [].}
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Gets system identification from os-release file and returns it as a parsecfg.Config. You also need to import the parsecfg module to gain access to this object. The os-release file is an official Freedesktop.org open standard. Available in Linux and BSD distributions, except Android and Android-based Linux. os-release file is not available on Windows and OS X by design.
Example:
import std/parsecfg
when defined(linux):
let data = osReleaseFile()
echo "OS name: ", data.getSectionValue("", "NAME")
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proc sendSignal(pid: Pid; signal: int) {....raises: [OSError], tags: [],
forbids: [].}
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Sends a signal to a running process by calling kill. Raise exception in case of failure e.g. process not running.
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proc stat(path: string): Stat {....raises: [OSError], tags: [], forbids: [].}
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Returns file status in a Stat structure
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proc uname(): Uname {....raises: [OSError], tags: [], forbids: [].}
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Provides system information in a Uname struct with sysname, nodename, release, version and machine attributes.
Example:
echo uname().nodename, uname().release, uname().version
doAssert uname().sysname.len != 0
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