lobase

Linux port of OpenBSDs userland.
Log | Files | Refs | README

commit ab3273a7e8d7a93ceccdf3ca2914542019a1e618
parent e911399a7dba86e47e653f00d42359c8039c4c93
Author: Duncaen <mail@duncano.de>
Date:   Tue,  7 Mar 2017 21:02:26 +0100

lib/libopenbsd: import getmntinfo(3)

Diffstat:
include/sys/mount.h | 1+
lib/libopenbsd/Makefile | 4++++
lib/libopenbsd/gen/getmntinfo.3 | 102+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
lib/libopenbsd/gen/getmntinfo.c | 61+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 168 insertions(+), 0 deletions(-)

diff --git a/include/sys/mount.h b/include/sys/mount.h @@ -36,6 +36,7 @@ struct openbsd_statfs { #define f_ffree buf.f_ffree #define f_flags buf.f_flags +int getmntinfo(struct statfs **, int); int getfsstat(struct statfs *, size_t, int); int openbsd_statfs(const char *, struct statfs *); diff --git a/lib/libopenbsd/Makefile b/lib/libopenbsd/Makefile @@ -60,6 +60,10 @@ ifneq ($(HAVE_GETFSSTAT),1) SRCS += sys/statfs.c endif +ifneq ($(HAVE_GETMNTINFO),1) + SRCS += gen/getmntinfo.c +endif + $(GEN_SRCS) : % : hash/helper.c hash/sha1hl.c: diff --git a/lib/libopenbsd/gen/getmntinfo.3 b/lib/libopenbsd/gen/getmntinfo.3 @@ -0,0 +1,102 @@ +.\" $OpenBSD: getmntinfo.3,v 1.13 2014/01/20 05:07:48 schwarze Exp $ +.\" +.\" Copyright (c) 1989, 1991, 1993 +.\" The Regents of the University of California. All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" 3. Neither the name of the University nor the names of its contributors +.\" may be used to endorse or promote products derived from this software +.\" without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.Dd $Mdocdate: January 20 2014 $ +.Dt GETMNTINFO 3 +.Os +.Sh NAME +.Nm getmntinfo +.Nd get information about mounted file systems +.Sh SYNOPSIS +.In sys/param.h +.In sys/mount.h +.Ft int +.Fn getmntinfo "struct statfs **mntbufp" "int flags" +.Sh DESCRIPTION +The +.Fn getmntinfo +function returns an array of +.Vt statfs +structures describing each currently mounted file system (see +.Xr statfs 2 ) . +.Pp +The +.Fn getmntinfo +function passes its +.Fa flags +parameter transparently to +.Xr getfsstat 2 . +.Sh RETURN VALUES +On successful completion, +.Fn getmntinfo +returns a count of the number of elements in the array. +The pointer to the array is stored into +.Fa mntbufp . +.Pp +If an error occurs, zero is returned and the external variable +.Va errno +is set to indicate the error. +Although the pointer +.Fa mntbufp +will be unmodified, any information previously returned by +.Fn getmntinfo +will be lost. +.Sh ERRORS +The +.Fn getmntinfo +function may fail and set +.Va errno +for any of the errors specified for the library routines +.Xr getfsstat 2 +or +.Xr malloc 3 . +.Sh SEE ALSO +.Xr getfsstat 2 , +.Xr mount 2 , +.Xr statfs 2 , +.Xr mount 8 +.Sh HISTORY +The +.Fn getmntinfo +function first appeared in +.Bx 4.4 . +.Sh BUGS +The +.Fn getmntinfo +function writes the array of structures to an internal static object +and returns a pointer to that object. +Subsequent calls to +.Fn getmntinfo +will modify the same object. +.Pp +The memory allocated by +.Fn getmntinfo +cannot be +.Xr free 3 Ns 'd +by the application. diff --git a/lib/libopenbsd/gen/getmntinfo.c b/lib/libopenbsd/gen/getmntinfo.c @@ -0,0 +1,61 @@ +/* $OpenBSD: getmntinfo.c,v 1.10 2015/09/14 16:09:13 tedu Exp $ */ +/* + * Copyright (c) 1989, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/types.h> +#include <sys/mount.h> +#include <stdlib.h> + +/* + * Return information about mounted filesystems. + */ +int +getmntinfo(struct statfs **mntbufp, int flags) +{ + static struct statfs *mntbuf; + static int mntsize; + static size_t bufsize; + + if (mntsize <= 0 && (mntsize = getfsstat(0, 0, MNT_NOWAIT)) < 0) + return (0); + if (bufsize > 0 && (mntsize = getfsstat(mntbuf, bufsize, flags)) < 0) + return (0); + while (bufsize <= mntsize * sizeof(struct statfs)) { + free(mntbuf); + bufsize = (mntsize + 1) * sizeof(struct statfs); + if ((mntbuf = malloc(bufsize)) == 0) { + bufsize = 0; + return (0); + } + if ((mntsize = getfsstat(mntbuf, bufsize, flags)) < 0) + return (0); + } + *mntbufp = mntbuf; + return (mntsize); +}