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.\"     From: @(#)gethostname.3 8.1 (Berkeley) 6/4/93
.\" %FreeBSD: src/lib/libc/gen/getbootfile.3,v 1.6.2.3 2001/12/14 18:33:51 ru Exp %
.\"
.\" $FreeBSD$
.Dd September 23, 1994
.Dt GETBOOTFILE 3
.Os
.Sh 名称
.Nm getbootfile
.Nd カーネル起動ファイル名を取得する
.Sh ライブラリ
.Lb libc
.Sh 書式
.In paths.h
.Ft const char *
.Fn getbootfile void
.Sh 解説
.Fn getbootfile
関数は、現在のカーネルがロードされてきた元のファイルのフルパス名を取り出し、
そのフルパス名への静的ポインタを返します。
この情報の読み込み/書き込みインタフェースは、
.Xr sysctl 3
MIB 変数
.Dq Li kern.bootfile
を介して利用できます。
.Sh 戻り値
呼び出しが成功した場合はパス名を与える文字列が返されます。
失敗した場合はヌルポインタが返され、エラーコードがグローバルな位置にある
.Va errno
に入れられます。
.Sh 関連項目
.Xr sysctl 3
.Sh バグ
起動時にカーネルへこの情報を渡すように、起動ブロックが修正されていない場合は、
実際の起動ファイル名の代わりに静的文字列
.Dq Pa /kernel
が返されます。
.Sh 歴史
.Fn getbootfile
関数呼び出しは
.Fx 2.0
ではじめて登場しました。