2015-05-24 16:47:14 +03:00
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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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2018-04-16 22:38:38 +03:00
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#include <win32/win32_compat.h>
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2015-05-24 16:47:14 +03:00
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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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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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