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c9bd9d9cb1
The file(1) manual suggests using -S (disable seccomp) with -z since
the set of system calls provided by the seccomp policy does not allow
the subprocess to run. This is obvious when you use file -z on a
compressed file on a Linux distro that enables file's seccomp policy
(Arch does this, Fedora does not):
$ file -zbsL lib-i586.so.zst
Bad system call
I also fixed some incorrect text in the manual.
Thanks: Toolybird for pointing to this fix
Reported-by: David Runge
Fixes: https://github.com/libguestfs/libguestfs/issues/100
(cherry picked from commit 23986d3c4f)
60 lines
1.9 KiB
OCaml
60 lines
1.9 KiB
OCaml
(* guestfs-inspection
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* Copyright (C) 2009-2020 Red Hat Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*)
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open Unix
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open Printf
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open Std_utils
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open Utils
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(* This runs the [file] command. *)
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let file path =
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let is_dev = is_device_parameter path in
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(* For non-dev, check this is a regular file, else just return the
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* file type as a string (RHBZ#582484).
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*)
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if not is_dev then (
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let chroot = Chroot.create ~name:(sprintf "file: %s" path) () in
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let statbuf = Chroot.f chroot lstat path in
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match statbuf.st_kind with
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| S_DIR -> "directory"
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| S_CHR -> "character device"
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| S_BLK -> "block device"
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| S_FIFO -> "FIFO"
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| S_LNK -> "symbolic link"
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| S_SOCK -> "socket"
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| S_REG ->
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(* Regular file, so now run [file] on it. *)
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let out = command "file" ["-zSb"; Sysroot.sysroot_path path] in
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(* We need to remove the trailing \n from output of file(1).
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*
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* Some upstream versions of file add a space at the end of the
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* output. This is fixed in the Fedora version, but we might as
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* well fix it here too. (RHBZ#928995).
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*)
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String.trimr out
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)
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else (* it's a device *) (
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let out = command "file" ["-zSbsL"; path] in
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String.trimr out
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)
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