examples/nfs-cp.c

   1 /*
   2    Copyright (C) by Ronnie Sahlberg <ronniesahlberg@gmail.com> 2013
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, see <http://www.gnu.org/licenses/>.
  16 */
  17
  18 #define _FILE_OFFSET_BITS 64
  19 #define _GNU_SOURCE
  20
  21 #ifdef HAVE_CONFIG_H
  22 #include "config.h"
  23 #endif
  24
  25 #ifdef AROS
  26 #include "aros_compat.h"
  27 #endif
  28
  29
  30 #ifdef WIN32
  31 #include "win32_compat.h"
  32 #pragma comment(lib, "ws2_32.lib")
  33 WSADATA wsaData;
  34 #else
  35 #include <sys/stat.h>
  36 #include <string.h>
  37 #endif
  38
  39 #ifdef HAVE_POLL_H
  40 #include <poll.h>
  41 #endif
  42
  43 #ifdef HAVE_UNISTD_H
  44 #include <unistd.h>
  45 #endif
  46
  47 #include <stdio.h>
  48 #include <stdlib.h>
  49 #include <stdint.h>
  50 #include <sys/types.h>
  51 #include <fcntl.h>
  52 #include "libnfs.h"
  53 #include "libnfs-raw.h"
  54 #include "libnfs-raw-mount.h"
  55
  56 struct file_context {
  57         int is_nfs;
  58         int fd;
  59         struct nfs_context *nfs;
  60         struct nfsfh *nfsfh;
  61         struct nfs_url *url;
  62 };
  63
  64 void usage(void)
  65 {
  66         fprintf(stderr, "Usage: nfs-cp <src> <dst>\n");
  67         fprintf(stderr, "<src>,<dst> can either be a local file or "
  68                         "an nfs URL.\n");
  69         exit(0);
  70 }
  71
  72 static void
  73 free_file_context(struct file_context *file_context)
  74 {
  75         if (file_context->fd != -1) {
  76                 close(file_context->fd);
  77         }
  78         if (file_context->nfsfh != NULL) {
  79                 nfs_close(file_context->nfs, file_context->nfsfh);
  80         }
  81         if (file_context->nfs != NULL) {
  82                 nfs_destroy_context(file_context->nfs);
  83         }
  84         nfs_destroy_url(file_context->url);
  85         free(file_context);
  86 }
  87
  88 static int
  89 fstat_file(struct file_context *fc, struct stat *st)
  90 {
  91         if (fc->is_nfs == 0) {
  92                 return fstat(fc->fd, st);
  93         } else {
  94                 return nfs_fstat(fc->nfs, fc->nfsfh, st);
  95         }
  96 }
  97
  98 static int64_t
  99 file_pread(struct file_context *fc, char *buf, int64_t count, uint64_t off)
 100 {
 101         if (fc->is_nfs == 0) {
 102                 lseek(fc->fd, off, SEEK_SET);
 103                 return read(fc->fd, buf, count);
 104         } else {
 105                 return nfs_pread(fc->nfs, fc->nfsfh, off, count, buf);
 106         }
 107 }
 108
 109 static int64_t
 110 file_pwrite(struct file_context *fc, char *buf, int64_t count, uint64_t off)
 111 {
 112         if (fc->is_nfs == 0) {
 113                 lseek(fc->fd, off, SEEK_SET);
 114                 return write(fc->fd, buf, count);
 115         } else {
 116                 return nfs_pwrite(fc->nfs, fc->nfsfh, off, count, buf);
 117         }
 118 }
 119
 120 static struct file_context *
 121 open_file(const char *url, int flags)
 122 {
 123         struct file_context *file_context;
 124
 125         file_context = malloc(sizeof(struct file_context));
 126         if (file_context == NULL) {
 127                 fprintf(stderr, "Failed to malloc file_context\n");
 128                 return NULL;
 129         }
 130         file_context->is_nfs = 0;
 131         file_context->fd     = -1;
 132         file_context->nfs    = NULL;
 133         file_context->nfsfh  = NULL;
 134         file_context->url    = NULL;
 135
 136         if (strncmp(url, "nfs://", 6)) {
 137                 file_context->is_nfs = 0;
 138                 file_context->fd = open(url, flags, 0660);
 139                 if (file_context->fd == -1) {
 140                         fprintf(stderr, "Failed to open %s\n", url);
 141                         free_file_context(file_context);
 142                         return NULL;
 143                 }
 144                 return file_context;
 145         }
 146
 147         file_context->is_nfs = 1;
 148
 149         file_context->nfs = nfs_init_context();
 150         if (file_context->nfs == NULL) {
 151                 fprintf(stderr, "failed to init context\n");
 152                 free_file_context(file_context);
 153                 return NULL;
 154         }
 155
 156         file_context->url = nfs_parse_url_full(file_context->nfs, url);
 157         if (file_context->url == NULL) {
 158                 fprintf(stderr, "%s\n", nfs_get_error(file_context->nfs));
 159                 free_file_context(file_context);
 160                 return NULL;
 161         }
 162
 163         if (nfs_mount(file_context->nfs, file_context->url->server,
 164                                 file_context->url->path) != 0) {
 165                 fprintf(stderr, "Failed to mount nfs share : %s\n",
 166                                nfs_get_error(file_context->nfs));
 167                 free_file_context(file_context);
 168                 return NULL;
 169         }
 170
 171         if (flags == O_RDONLY) {
 172                 if (nfs_open(file_context->nfs, file_context->url->file, flags,
 173                                 &file_context->nfsfh) != 0) {
 174                         fprintf(stderr, "Failed to open file %s: %s\n",
 175                                        file_context->url->file,
 176                                        nfs_get_error(file_context->nfs));
 177                         free_file_context(file_context);
 178                         return NULL;
 179                 }
 180         } else {
 181                 if (nfs_creat(file_context->nfs, file_context->url->file, 0660,
 182                                 &file_context->nfsfh) != 0) {
 183                         fprintf(stderr, "Failed to creat file %s: %s\n",
 184                                        file_context->url->file,
 185                                        nfs_get_error(file_context->nfs));
 186                         free_file_context(file_context);
 187                         return NULL;
 188                 }
 189         }
 190         return file_context;
 191 }
 192
 193 #define BUFSIZE 1024*1024
 194 static char buf[BUFSIZE];
 195
 196 int main(int argc, char *argv[])
 197 {
 198         int ret;
 199         struct stat st;
 200         struct file_context *src;
 201         struct file_context *dst;
 202         uint64_t off;
 203         int64_t count;
 204
 205 #ifdef WIN32
 206         if (WSAStartup(MAKEWORD(2,2), &wsaData) != 0) {
 207                 printf("Failed to start Winsock2\n");
 208                 return 10;
 209         }
 210 #endif
 211
 212 #ifdef AROS
 213         aros_init_socket();
 214 #endif
 215
 216         if (argc != 3) {
 217                 usage();
 218         }
 219
 220         src = open_file(argv[1], O_RDONLY);
 221         if (src == NULL) {
 222                 fprintf(stderr, "Failed to open %s\n", argv[1]);
 223                 return 10;
 224         }
 225
 226         dst = open_file(argv[2], O_WRONLY|O_CREAT|O_TRUNC);
 227         if (dst == NULL) {
 228                 fprintf(stderr, "Failed to open %s\n", argv[2]);
 229                 free_file_context(src);
 230                 return 10;
 231         }
 232
 233         if (fstat_file(src, &st) != 0) {
 234                 fprintf(stderr, "Failed to fstat source file\n");
 235                 free_file_context(src);
 236                 free_file_context(dst);
 237                 return 10;
 238         }
 239
 240         off = 0;
 241         while (off < st.st_size) {
 242                 count = st.st_size - off;
 243                 if (count > BUFSIZE) {
 244                         count = BUFSIZE;
 245                 }
 246                 count = file_pread(src, buf, count, off);
 247                 if (count < 0) {
 248                         fprintf(stderr, "Failed to read from source file\n");
 249                         free_file_context(src);
 250                         free_file_context(dst);
 251                         return 10;
 252                 }
 253                 count = file_pwrite(dst, buf, count, off);
 254                 if (count < 0) {
 255                         fprintf(stderr, "Failed to write to dest file\n");
 256                         free_file_context(src);
 257                         free_file_context(dst);
 258                         return 10;
 259                 }
 260
 261                 off += count;
 262         }
 263         printf("copied %d bytes\n", (int)off);
 264
 265         free_file_context(src);
 266         free_file_context(dst);
 267
 268         return 0;
 269 }