UTILS: add nfs-cat utility
Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>libnfs-4.0.0-vitalif
Ronnie Sahlberg
parent
63d40b1737
commit
4b1de15bb5
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@ -1,9 +1,10 @@
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XSLTPROC = /usr/bin/xsltproc
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EXTRA_DIST = nfs-ls.1 nfs-ls.1.xml
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EXTRA_DIST = nfs-cat.1 nfs-cat.1.xml nfs-ls.1 nfs-ls.1.xml
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# Manpages
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man1_MANS = nfs-ls.1
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man1_MANS = nfs-cat.1 nfs-ls.1
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doc:
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-test -z "$(XSLTPROC)" || $(XSLTPROC) -o nfs-cat.1 http://docbook.sourceforge.net/release/xsl/current/manpages/docbook.xsl nfs-cat.1.xml
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-test -z "$(XSLTPROC)" || $(XSLTPROC) -o nfs-ls.1 http://docbook.sourceforge.net/release/xsl/current/manpages/docbook.xsl nfs-ls.1.xml
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@ -0,0 +1,54 @@
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'\" t
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.\" Title: nfs-cat
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.\" Author: [FIXME: author] [see http://docbook.sf.net/el/author]
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.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
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.\" Date: 05/24/2015
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.\" Manual: nfs-cat: read a file from nfs
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.\" Source: nfs-cat
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.\" Language: English
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.\"
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.TH "NFS\-CAT" "1" "05/24/2015" "nfs\-cat" "nfs\-cat: read a file from nfs"
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.\" -----------------------------------------------------------------
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.\" * Define some portability stuff
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.\" -----------------------------------------------------------------
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.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.\" http://bugs.debian.org/507673
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.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
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.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.ie \n(.g .ds Aq \(aq
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.el .ds Aq '
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.\" -----------------------------------------------------------------
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.\" * set default formatting
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.\" -----------------------------------------------------------------
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.\" disable hyphenation
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.nh
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.\" disable justification (adjust text to left margin only)
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.ad l
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.\" -----------------------------------------------------------------
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.\" * MAIN CONTENT STARTS HERE *
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.\" -----------------------------------------------------------------
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.SH "NAME"
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nfs-cat \- Utility to read a file off NFS
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.SH "SYNOPSIS"
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.HP \w'\fBnfs\-cat\ <NFS\-URL>\fR\ 'u
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\fBnfs\-cat <NFS\-URL>\fR
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.SH "DESCRIPTION"
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.PP
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nfs\-cat is a utility to read a file off an NFS server\&.
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.PP
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Example: Print the content of a file:
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.sp
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.if n \{\
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.RS 4
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.\}
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.nf
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$ nfs\-cat nfs://127\&.0\&.0\&.1/data/tmp/foo\&.c
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.fi
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.if n \{\
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.RE
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.\}
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.sp
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.SH "SEE ALSO"
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.PP
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\m[blue]\fB\%http://github.com/sahlberg/libnfs\fR\m[]
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@ -0,0 +1,42 @@
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<?xml version="1.0" encoding="iso-8859-1"?>
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<refentry id="nfs-ls.1">
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<refmeta>
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<refentrytitle>nfs-cat</refentrytitle>
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<manvolnum>1</manvolnum>
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<refmiscinfo class="source">nfs-cat</refmiscinfo>
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<refmiscinfo class="manual">nfs-cat: read a file from nfs</refmiscinfo>
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</refmeta>
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<refnamediv>
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<refname>nfs-cat</refname>
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<refpurpose>Utility to read a file off NFS</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<cmdsynopsis>
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<command>nfs-cat <NFS-URL></command>
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsect1><title>DESCRIPTION</title>
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<para>
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nfs-cat is a utility to read a file off an NFS server.
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</para>
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<para>
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Example: Print the content of a file:
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<screen format="linespecific">
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$ nfs-cat nfs://127.0.0.1/data/tmp/foo.c
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</screen>
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</para>
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</refsect1>
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<refsect1><title>SEE ALSO</title>
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<para>
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<ulink url="http://github.com/sahlberg/libnfs"/>
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</para>
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</refsect1>
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</refentry>
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@ -2,12 +2,12 @@
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.\" Title: nfs-ls
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.\" Author: [FIXME: author] [see http://docbook.sf.net/el/author]
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.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
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.\" Date: 05/14/2014
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.\" Date: 05/24/2015
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.\" Manual: nfs-ls: list servers, exports and directories
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.\" Source: nfs-ls
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.\" Language: English
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.\"
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.TH "NFS\-LS" "1" "05/14/2014" "nfs\-ls" "nfs\-ls: list servers, exports"
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.TH "NFS\-LS" "1" "05/24/2015" "nfs\-ls" "nfs\-ls: list servers, exports"
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.\" -----------------------------------------------------------------
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.\" * Define some portability stuff
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.\" -----------------------------------------------------------------
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@ -105,6 +105,8 @@ Utility programs for LibNFS
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%files utils
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%defattr(-,root,root)
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%{_bindir}/nfs-ls
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%{_bindir}/nfs-cat
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%{_mandir}/man1/nfs-cat.1.gz
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%{_mandir}/man1/nfs-ls.1.gz
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%changelog
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@ -1,4 +1,4 @@
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bin_PROGRAMS = nfs-ls
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bin_PROGRAMS = nfs-cat nfs-ls
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AM_CPPFLAGS = \
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-I$(abs_top_srcdir)/include \
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@ -0,0 +1,202 @@
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/*
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Copyright (C) by Ronnie Sahlberg <ronniesahlberg@gmail.com> 2015
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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 3 of the License, or
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(at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#define _FILE_OFFSET_BITS 64
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#define _GNU_SOURCE
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#ifdef AROS
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#include "aros_compat.h"
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#endif
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#ifdef WIN32
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#include "win32_compat.h"
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#pragma comment(lib, "ws2_32.lib")
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WSADATA wsaData;
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#else
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#include <sys/stat.h>
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#include <string.h>
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#endif
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#ifdef HAVE_POLL_H
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#include <poll.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include "libnfs.h"
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#include "libnfs-raw.h"
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#include "libnfs-raw-mount.h"
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struct file_context {
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int fd;
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struct nfs_context *nfs;
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struct nfsfh *nfsfh;
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struct nfs_url *url;
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};
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void usage(void)
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{
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fprintf(stderr, "Usage: nfs-cat <file>\n");
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fprintf(stderr, "<file> cat an nfs file.\n");
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exit(0);
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}
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static void
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free_file_context(struct file_context *file_context)
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{
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if (file_context->fd != -1) {
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close(file_context->fd);
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}
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if (file_context->nfsfh != NULL) {
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nfs_close(file_context->nfs, file_context->nfsfh);
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}
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if (file_context->nfs != NULL) {
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nfs_destroy_context(file_context->nfs);
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}
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nfs_destroy_url(file_context->url);
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free(file_context);
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}
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static struct file_context *
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open_file(const char *url, int flags)
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{
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struct file_context *file_context;
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file_context = malloc(sizeof(struct file_context));
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if (file_context == NULL) {
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fprintf(stderr, "Failed to malloc file_context\n");
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return NULL;
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}
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file_context->fd = -1;
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file_context->nfs = NULL;
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file_context->nfsfh = NULL;
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file_context->url = NULL;
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file_context->nfs = nfs_init_context();
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if (file_context->nfs == NULL) {
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fprintf(stderr, "failed to init context\n");
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free_file_context(file_context);
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return NULL;
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}
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rpc_set_tcp_syncnt(nfs_get_rpc_context(file_context->nfs), 2);
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file_context->url = nfs_parse_url_full(file_context->nfs, url);
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if (file_context->url == NULL) {
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fprintf(stderr, "%s\n", nfs_get_error(file_context->nfs));
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free_file_context(file_context);
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return NULL;
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}
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if (nfs_mount(file_context->nfs, file_context->url->server,
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file_context->url->path) != 0) {
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fprintf(stderr, "Failed to mount nfs share : %s\n",
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nfs_get_error(file_context->nfs));
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free_file_context(file_context);
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return NULL;
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}
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if (flags == O_RDONLY) {
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if (nfs_open(file_context->nfs, file_context->url->file, flags,
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&file_context->nfsfh) != 0) {
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fprintf(stderr, "Failed to open file %s: %s\n",
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file_context->url->file,
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nfs_get_error(file_context->nfs));
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free_file_context(file_context);
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return NULL;
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}
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} else {
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if (nfs_creat(file_context->nfs, file_context->url->file, 0660,
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&file_context->nfsfh) != 0) {
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fprintf(stderr, "Failed to creat file %s: %s\n",
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file_context->url->file,
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nfs_get_error(file_context->nfs));
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free_file_context(file_context);
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return NULL;
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}
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}
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return file_context;
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}
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#define BUFSIZE 1024*1024
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static char buf[BUFSIZE];
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int main(int argc, char *argv[])
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{
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int ret;
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struct file_context *nf;
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struct nfs_stat_64 st;
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uint64_t off;
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int64_t count;
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#ifdef WIN32
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if (WSAStartup(MAKEWORD(2,2), &wsaData) != 0) {
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printf("Failed to start Winsock2\n");
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return 10;
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}
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#endif
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#ifdef AROS
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aros_init_socket();
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#endif
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if (argc < 2) {
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usage();
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}
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nf = open_file(argv[1], O_RDONLY);
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if (nf == NULL) {
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fprintf(stderr, "Failed to open %s\n", argv[1]);
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exit(10);
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}
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if (nfs_fstat64(nf->nfs, nf->nfsfh, &st) < 0) {
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fprintf(stderr, "Failed to stat %s\n", argv[1]);
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exit(10);
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}
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off = 0;
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while (off < st.nfs_size) {
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count = st.nfs_size - off;
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if (count > BUFSIZE) {
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count = BUFSIZE;
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}
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count = nfs_pread(nf->nfs, nf->nfsfh, off, count, buf);
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if (count < 0) {
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fprintf(stderr, "Failed to read from file\n");
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free_file_context(nf);
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return 10;
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}
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fwrite(buf, count, 1, stdout);
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off += count;
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}
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free_file_context(nf);
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return 0;
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}
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