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Thu, 6 Jan 2022 11:57:57 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id OCy1NkXZ1mHnJgAAMHmgww (envelope-from ); Thu, 06 Jan 2022 11:57:57 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: e3e64e6f-6ee7-11ec-81c0-a30af7de8005 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1641470278; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=+GsFFIwit/Rt80w572ZQFBg1V74eYMuV1hjsub3Nyy0=; b=j/mDeu9UoOTfcQ/Pp6xXG3woMs+R3iP731Yk+OmKxmC5o4xgv83dcLoIqnL4xgZF/KUkzW 9lsqeKRBzTMviC0ajrCi4mO4MNc7tXWd9ZTMAMT9Wf38zyCnpyKxYdTNxs/ipBsp+j4eWv gMX/kIuCenCimRfwWjVkagf1Wrk9yHo= From: Juergen Gross To: minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org Cc: samuel.thibault@ens-lyon.org, wl@xen.org, Juergen Gross Subject: [PATCH 15/15] mini-os: introduce get_file_from_fd() Date: Thu, 6 Jan 2022 12:57:41 +0100 Message-Id: <20220106115741.3219-16-jgross@suse.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20220106115741.3219-1-jgross@suse.com> References: <20220106115741.3219-1-jgross@suse.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @suse.com) X-ZM-MESSAGEID: 1641470453386100003 Content-Type: text/plain; charset="utf-8" Exporting the files[] array especially for components outside the mini-os source tree is limiting the ability to change any file handling in mini-os. Introduce a new function get_file_from_fd() to return the struct file pointer (or NULL) for a given file descriptor. Signed-off-by: Juergen Gross Reviewed-by: Samuel Thibault --- include/lib.h | 1 + lib/sys.c | 8 ++++++++ 2 files changed, 9 insertions(+) diff --git a/include/lib.h b/include/lib.h index 91364ba..7a0546b 100644 --- a/include/lib.h +++ b/include/lib.h @@ -198,6 +198,7 @@ struct file { =20 extern struct file files[]; =20 +struct file *get_file_from_fd(int fd); int alloc_fd(enum fd_type type); void close_all_files(void); extern struct thread *main_thread; diff --git a/lib/sys.c b/lib/sys.c index 6f2b026..0e6fe5d 100644 --- a/lib/sys.c +++ b/lib/sys.c @@ -98,6 +98,14 @@ struct file files[NOFILE] =3D { { .type =3D FTYPE_CONSOLE }, /* stderr */ }; =20 +struct file *get_file_from_fd(int fd) +{ + if ( fd < 0 || fd >=3D NOFILE ) + return NULL; + + return (files[fd].type =3D=3D FTYPE_NONE) ? NULL : files + fd; +} + DECLARE_WAIT_QUEUE_HEAD(event_queue); =20 int alloc_fd(enum fd_type type) --=20 2.26.2