go-sysconf
sysconf and pathconf for Go, without using cgo or external binaries (e.g. getconf).
Supported operating systems: Linux, macOS, DragonflyBSD, FreeBSD, NetBSD, OpenBSD, Solaris/Illumos.
All POSIX.1 and POSIX.2 variables are supported, see References for a complete list.
System-wide variables are available as SC_* constants and are queried using
the Sysconf function.
Path-dependent variables are available as PC_* constants and queried using
the Pathconf or Fpathconf functions.
Additionally, the following non-standard variables are supported on some operating systems:
| Variable | Supported on |
|---|---|
| SC_PHYS_PAGES | Linux, macOS, FreeBSD, NetBSD, OpenBSD, Solaris/Illumos |
| SC_AVPHYS_PAGES | Linux, OpenBSD, Solaris/Illumos |
| SC_NPROCESSORS_CONF | Linux, macOS, FreeBSD, NetBSD, OpenBSD, Solaris/Illumos |
| SC_NPROCESSORS_ONLN | Linux, macOS, FreeBSD, NetBSD, OpenBSD, Solaris/Illumos |
| SC_UIO_MAXIOV | Linux |
Usage
package main
import (
"fmt"
"github.com/tklauser/go-sysconf"
)
func main() {
// get clock ticks, this will return the same as C.sysconf(C._SC_CLK_TCK)
clktck, err := sysconf.Sysconf(sysconf.SC_CLK_TCK)
if err == nil {
fmt.Printf("SC_CLK_TCK: %v\n", clktck)
}
// get the maximum filename length for the root directory
namemax, err := sysconf.Pathconf("/", sysconf.PC_NAME_MAX)
if err == nil {
fmt.Printf("PC_NAME_MAX: %v\n", namemax)
}
}