47 lines
1.7 KiB
Markdown
47 lines
1.7 KiB
Markdown
# go-sysconf
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[](https://pkg.go.dev/github.com/tklauser/go-sysconf)
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[](https://github.com/tklauser/go-sysconf/actions?query=workflow%3ATests)
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`sysconf` for Go, without using cgo or external binaries (e.g. getconf).
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Supported operating systems: Linux, macOS, DragonflyBSD, FreeBSD, NetBSD, OpenBSD, Solaris/Illumos.
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All POSIX.1 and POSIX.2 variables are supported, see [References](#references) for a complete list.
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Additionally, the following non-standard variables are supported on some operating systems:
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| Variable | Supported on |
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|---|---|
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| `SC_PHYS_PAGES` | Linux, macOS, FreeBSD, NetBSD, OpenBSD, Solaris/Illumos |
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| `SC_AVPHYS_PAGES` | Linux, OpenBSD, Solaris/Illumos |
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| `SC_NPROCESSORS_CONF` | Linux, macOS, FreeBSD, NetBSD, OpenBSD, Solaris/Illumos |
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| `SC_NPROCESSORS_ONLN` | Linux, macOS, FreeBSD, NetBSD, OpenBSD, Solaris/Illumos |
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| `SC_UIO_MAXIOV` | Linux |
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## Usage
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```Go
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package main
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import (
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"fmt"
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"github.com/tklauser/go-sysconf"
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)
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func main() {
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// get clock ticks, this will return the same as C.sysconf(C._SC_CLK_TCK)
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clktck, err := sysconf.Sysconf(sysconf.SC_CLK_TCK)
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if err == nil {
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fmt.Printf("SC_CLK_TCK: %v\n", clktck)
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}
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}
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```
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## References
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* [POSIX documenation for `sysconf`](http://pubs.opengroup.org/onlinepubs/9699919799/functions/sysconf.html)
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* [Linux manpage for `sysconf(3)`](http://man7.org/linux/man-pages/man3/sysconf.3.html)
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* [glibc constants for `sysconf` parameters](https://www.gnu.org/software/libc/manual/html_node/Constants-for-Sysconf.html)
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