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/*
Copyright (C) by Ronnie Sahlberg <ronniesahlberg@gmail.com> 2015
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#define _FILE_OFFSET_BITS 64
#define _GNU_SOURCE
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef AROS
#include "aros_compat.h"
#endif
#ifdef WIN32
#include <win32/win32_compat.h>
#pragma comment(lib, "ws2_32.lib")
WSADATA wsaData;
#else
#include <sys/stat.h>
#include <string.h>
#endif
#ifdef HAVE_POLL_H
#include <poll.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <sys/types.h>
#include <fcntl.h>
#include "libnfs.h"
#include "libnfs-raw.h"
#include "libnfs-raw-mount.h"
struct file_context {
int fd;
struct nfs_context *nfs;
struct nfsfh *nfsfh;
struct nfs_url *url;
};
void usage(void)
{
fprintf(stderr, "Usage: nfs-cat <file>\n");
fprintf(stderr, "<file> cat an nfs file.\n");
exit(0);
}
static void
free_file_context(struct file_context *file_context)
{
if (file_context->fd != -1) {
close(file_context->fd);
}
if (file_context->nfsfh != NULL) {
nfs_close(file_context->nfs, file_context->nfsfh);
}
if (file_context->nfs != NULL) {
nfs_destroy_context(file_context->nfs);
}
nfs_destroy_url(file_context->url);
free(file_context);
}
static struct file_context *
open_file(const char *url, int flags)
{
struct file_context *file_context;
file_context = malloc(sizeof(struct file_context));
if (file_context == NULL) {
fprintf(stderr, "Failed to malloc file_context\n");
return NULL;
}
file_context->fd = -1;
file_context->nfs = NULL;
file_context->nfsfh = NULL;
file_context->url = NULL;
file_context->nfs = nfs_init_context();
if (file_context->nfs == NULL) {
fprintf(stderr, "failed to init context\n");
free_file_context(file_context);
return NULL;
}
file_context->url = nfs_parse_url_full(file_context->nfs, url);
if (file_context->url == NULL) {
fprintf(stderr, "%s\n", nfs_get_error(file_context->nfs));
free_file_context(file_context);
return NULL;
}
if (nfs_mount(file_context->nfs, file_context->url->server,
file_context->url->path) != 0) {
fprintf(stderr, "Failed to mount nfs share : %s\n",
nfs_get_error(file_context->nfs));
free_file_context(file_context);
return NULL;
}
if (flags == O_RDONLY) {
if (nfs_open(file_context->nfs, file_context->url->file, flags,
&file_context->nfsfh) != 0) {
fprintf(stderr, "Failed to open file %s: %s\n",
file_context->url->file,
nfs_get_error(file_context->nfs));
free_file_context(file_context);
return NULL;
}
} else {
if (nfs_creat(file_context->nfs, file_context->url->file, 0660,
&file_context->nfsfh) != 0) {
fprintf(stderr, "Failed to creat file %s: %s\n",
file_context->url->file,
nfs_get_error(file_context->nfs));
free_file_context(file_context);
return NULL;
}
}
return file_context;
}
#define BUFSIZE 1024*1024
static char buf[BUFSIZE];
int main(int argc, char *argv[])
{
int ret;
struct file_context *nf;
struct nfs_stat_64 st;
uint64_t off;
int64_t count;
#ifdef WIN32
if (WSAStartup(MAKEWORD(2,2), &wsaData) != 0) {
printf("Failed to start Winsock2\n");
return 10;
}
#endif
#ifdef AROS
aros_init_socket();
#endif
if (argc < 2) {
usage();
}
nf = open_file(argv[1], O_RDONLY);
if (nf == NULL) {
fprintf(stderr, "Failed to open %s\n", argv[1]);
exit(10);
}
if (nfs_fstat64(nf->nfs, nf->nfsfh, &st) < 0) {
fprintf(stderr, "Failed to stat %s\n", argv[1]);
exit(10);
}
off = 0;
while (off < st.nfs_size) {
count = st.nfs_size - off;
if (count > BUFSIZE) {
count = BUFSIZE;
}
count = nfs_pread(nf->nfs, nf->nfsfh, off, count, buf);
if (count < 0) {
fprintf(stderr, "Failed to read from file\n");
free_file_context(nf);
return 10;
}
fwrite(buf, count, 1, stdout);
off += count;
}
free_file_context(nf);
return 0;
}
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