examples/nfsclient-sync.c

   1 /*
   2    Copyright (C) by Ronnie Sahlberg <ronniesahlberg@gmail.com> 2010
   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 /* Example program using the highlevel sync interface
  19  */
  20
  21 #define SERVER "10.1.1.27"
  22 #define EXPORT "/VIRTUAL"
  23 #define NFSFILE "/BOOKS/Classics/Dracula.djvu.truncated"
  24 #define NFSFILER "/BOOKS/Classics/Dracula.djvu.renamed"
  25 #define NFSFILEW "/BOOKS/Classics/foo"
  26 #define NFSDIR "/BOOKS/Classics/"
  27
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <stdint.h>
  31 #include <sys/types.h>
  32 #include <sys/stat.h>
  33 #include <sys/statvfs.h>
  34 #include <unistd.h>
  35 #include <fcntl.h>
  36 #include "libnfs.h"
  37 #include <rpc/rpc.h>            /* for authunix_create() */
  38 #include "libnfs-raw.h"
  39 #include "libnfs-raw-mount.h"
  40
  41 struct client {
  42        char *server;
  43        char *export;
  44        uint32_t mount_port;
  45        int is_finished;
  46 };
  47
  48
  49 char buf[5*1024*1024];
  50
  51 int main(int argc _U_, char *argv[] _U_)
  52 {
  53         struct nfs_context *nfs;
  54         int i, ret;
  55         struct client client;
  56         struct stat st;
  57         struct nfsfh  *nfsfh;
  58         struct nfsdir *nfsdir;
  59         struct nfsdirent *nfsdirent;
  60         client.server = SERVER;
  61         client.export = EXPORT;
  62         client.is_finished = 0;
  63         off_t offset;
  64         struct statvfs svfs;
  65         exports export, tmp;
  66
  67         export = mount_getexports(SERVER);
  68         if (export != NULL) {
  69                 printf("exports on server %s\n", SERVER);
  70                 tmp = export;
  71                 while (tmp != NULL) {
  72                       printf("Export: %s\n", tmp->ex_dir);
  73                       tmp = tmp->ex_next;
  74                 }
  75
  76                 mount_free_export_list(export);
  77         } else {
  78                 printf("no exports on server %s\n", SERVER);
  79         }
  80
  81         nfs = nfs_init_context();
  82         if (nfs == NULL) {
  83                 printf("failed to init context\n");
  84                 exit(10);
  85         }
  86
  87         ret = nfs_mount(nfs, client.server, client.export);
  88         if (ret != 0) {
  89                 printf("Failed to mount nfs share : %s\n", nfs_get_error(nfs));
  90                 exit(10);
  91         }
  92         printf("mounted share successfully %s\n", nfs_get_error(nfs));
  93
  94
  95         ret = nfs_stat(nfs, NFSFILE, &st);
  96         if (ret != 0) {
  97                 printf("Failed to stat(%s) %s\n", NFSFILE, nfs_get_error(nfs));
  98                 exit(10);
  99         }
 100         printf("Mode %04o\n", st.st_mode);
 101         printf("Size %d\n", (int)st.st_size);
 102         printf("Inode %04o\n", (int)st.st_ino);
 103
 104         ret = nfs_open(nfs, NFSFILE, O_RDONLY, &nfsfh);
 105         if (ret != 0) {
 106                 printf("Failed to open(%s) %s\n", NFSFILE, nfs_get_error(nfs));
 107                 exit(10);
 108         }
 109
 110 #if 0
 111         ret = nfs_read(nfs, nfsfh, 16, buf);
 112         if (ret < 0) {
 113                 printf("Failed to pread(%s) %s\n", NFSFILE, nfs_get_error(nfs));
 114                 exit(10);
 115         }
 116         printf("read %d bytes\n", ret);
 117         for (i=0;i<16;i++) {
 118                 printf("%02x ", buf[i]&0xff);
 119         }
 120         printf("\n");
 121 #endif
 122         ret = nfs_read(nfs, nfsfh, sizeof(buf), buf);
 123         if (ret < 0) {
 124                 printf("Failed to pread(%s) %s\n", NFSFILE, nfs_get_error(nfs));
 125                 exit(10);
 126         }
 127         printf("read %d bytes\n", ret);
 128         for (i=0;i<16;i++) {
 129                 printf("%02x ", buf[i]&0xff);
 130         }
 131         printf("\n");
 132
 133         ret = (int)nfs_lseek(nfs, nfsfh, 0, SEEK_CUR, &offset);
 134         if (ret < 0) {
 135                 printf("Failed to lseek(%s) %s\n", NFSFILE, nfs_get_error(nfs));
 136                 exit(10);
 137         }
 138         printf("File position is %d\n", (int)offset);
 139
 140         printf("seek to end of file\n");
 141         ret = (int)nfs_lseek(nfs, nfsfh, 0, SEEK_END, &offset);
 142         if (ret < 0) {
 143                 printf("Failed to lseek(%s) %s\n", NFSFILE, nfs_get_error(nfs));
 144                 exit(10);
 145         }
 146         printf("File position is %d\n", (int)offset);
 147
 148         ret = nfs_fstat(nfs, nfsfh, &st);
 149         if (ret != 0) {
 150                 printf("Failed to stat(%s) %s\n", NFSFILE, nfs_get_error(nfs));
 151                 exit(10);
 152         }
 153         printf("Mode %04o\n", st.st_mode);
 154         printf("Size %d\n", (int)st.st_size);
 155         printf("Inode %04o\n", (int)st.st_ino);
 156
 157
 158         ret = nfs_close(nfs, nfsfh);
 159         if (ret < 0) {
 160                 printf("Failed to close(%s): %s\n", NFSFILE, nfs_get_error(nfs));
 161                 exit(10);
 162         }
 163
 164         ret = nfs_opendir(nfs, NFSDIR, &nfsdir);
 165         if (ret != 0) {
 166                 printf("Failed to open(%s) %s\n", NFSFILE, nfs_get_error(nfs));
 167                 exit(10);
 168         }
 169         while((nfsdirent = nfs_readdir(nfs, nfsdir)) != NULL) {
 170                 printf("Inode:%d Name:%s\n", (int)nfsdirent->inode, nfsdirent->name);
 171         }
 172         nfs_closedir(nfs, nfsdir);
 173
 174
 175         ret = nfs_open(nfs, NFSFILEW, O_WRONLY, &nfsfh);
 176         if (ret != 0) {
 177                 printf("Failed to open(%s) %s\n", NFSFILEW, nfs_get_error(nfs));
 178                 exit(10);
 179         }
 180         ret = nfs_pwrite(nfs, nfsfh, 0, 16, buf);
 181         if (ret < 0) {
 182                 printf("Failed to pwrite(%s) %s\n", NFSFILEW, nfs_get_error(nfs));
 183                 exit(10);
 184         }
 185         ret = nfs_fsync(nfs, nfsfh);
 186         if (ret < 0) {
 187                 printf("Failed to fsync(%s) %s\n", NFSFILEW, nfs_get_error(nfs));
 188                 exit(10);
 189         }
 190         ret = nfs_close(nfs, nfsfh);
 191         if (ret < 0) {
 192                 printf("Failed to close(%s) %s\n", NFSFILEW, nfs_get_error(nfs));
 193                 exit(10);
 194         }
 195
 196
 197         ret = nfs_statvfs(nfs, NFSDIR, &svfs);
 198         if (ret < 0) {
 199                 printf("Failed to statvfs(%s) %s\n", NFSDIR, nfs_get_error(nfs));
 200                 exit(10);
 201         }
 202         printf("files %d/%d/%d\n", (int)svfs.f_files, (int)svfs.f_ffree, (int)svfs.f_favail);
 203
 204
 205         ret = nfs_access(nfs, NFSFILE, R_OK);
 206         if (ret != 0) {
 207                 printf("Failed to access(%s) %s\n", NFSFILE, nfs_get_error(nfs));
 208         }
 209
 210         /* become root */
 211         nfs_set_auth(nfs, authunix_create("Ronnies-Laptop", 0, 0, 0, NULL));
 212
 213         ret = nfs_link(nfs, NFSFILE, NFSFILER);
 214         if (ret != 0) {
 215                 printf("Failed to link(%s) %s\n", NFSFILE, nfs_get_error(nfs));
 216         }
 217
 218
 219         nfs_destroy_context(nfs);
 220         printf("nfsclient finished\n");
 221         return 0;
 222 }
 223