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"
  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 int main(int argc _U_, char *argv[] _U_)
  50 {
  51         struct nfs_context *nfs;
  52         int i, ret;
  53         struct client client;
  54         struct stat st;
  55         struct nfsfh  *nfsfh;
  56         struct nfsdir *nfsdir;
  57         struct nfsdirent *nfsdirent;
  58         client.server = SERVER;
  59         client.export = EXPORT;
  60         client.is_finished = 0;
  61         char buf[16];
  62         off_t offset;
  63         struct statvfs svfs;
  64         exports export, tmp;
  65         struct rpc_context *mount_context;
  66
  67         printf("exports on server %s\n", SERVER);
  68         mount_context = rpc_init_context();
  69         export = mount_getexports(mount_context, SERVER);
  70         tmp = export;
  71         while (tmp != NULL) {
  72               printf("Export: %s\n", tmp->ex_dir);
  73               tmp = tmp->ex_next;
  74         }
  75         mount_free_export_list(export);
  76         rpc_destroy_context(mount_context);
  77
  78
  79
  80         nfs = nfs_init_context();
  81         if (nfs == NULL) {
  82                 printf("failed to init context\n");
  83                 exit(10);
  84         }
  85
  86         ret = nfs_mount(nfs, client.server, client.export);
  87         if (ret != 0) {
  88                 printf("Failed to mount nfs share : %s\n", nfs_get_error(nfs));
  89                 exit(10);
  90         }
  91         printf("mounted share successfully\n");
  92
  93
  94         ret = nfs_stat(nfs, NFSFILE, &st);
  95         if (ret != 0) {
  96                 printf("Failed to stat(%s) %s\n", NFSFILE, nfs_get_error(nfs));
  97                 exit(10);
  98         }
  99         printf("Mode %04o\n", st.st_mode);
 100         printf("Size %d\n", (int)st.st_size);
 101         printf("Inode %04o\n", (int)st.st_ino);
 102
 103         ret = nfs_open(nfs, NFSFILE, O_RDONLY, &nfsfh);
 104         if (ret != 0) {
 105                 printf("Failed to open(%s) %s\n", NFSFILE, nfs_get_error(nfs));
 106                 exit(10);
 107         }
 108
 109         ret = nfs_read(nfs, nfsfh, 16, buf);
 110         if (ret < 0) {
 111                 printf("Failed to pread(%s) %s\n", NFSFILE, nfs_get_error(nfs));
 112                 exit(10);
 113         }
 114         printf("read %d bytes\n", ret);
 115         for (i=0;i<16;i++) {
 116                 printf("%02x ", buf[i]&0xff);
 117         }
 118         printf("\n");
 119         ret = nfs_read(nfs, nfsfh, 16, buf);
 120         if (ret < 0) {
 121                 printf("Failed to pread(%s) %s\n", NFSFILE, nfs_get_error(nfs));
 122                 exit(10);
 123         }
 124         printf("read %d bytes\n", ret);
 125         for (i=0;i<16;i++) {
 126                 printf("%02x ", buf[i]&0xff);
 127         }
 128         printf("\n");
 129
 130         ret = (int)nfs_lseek(nfs, nfsfh, 0, SEEK_CUR, &offset);
 131         if (ret < 0) {
 132                 printf("Failed to lseek(%s) %s\n", NFSFILE, nfs_get_error(nfs));
 133                 exit(10);
 134         }
 135         printf("File position is %d\n", (int)offset);
 136
 137         printf("seek to end of file\n");
 138         ret = (int)nfs_lseek(nfs, nfsfh, 0, SEEK_END, &offset);
 139         if (ret < 0) {
 140                 printf("Failed to lseek(%s) %s\n", NFSFILE, nfs_get_error(nfs));
 141                 exit(10);
 142         }
 143         printf("File position is %d\n", (int)offset);
 144
 145         ret = nfs_fstat(nfs, nfsfh, &st);
 146         if (ret != 0) {
 147                 printf("Failed to stat(%s) %s\n", NFSFILE, nfs_get_error(nfs));
 148                 exit(10);
 149         }
 150         printf("Mode %04o\n", st.st_mode);
 151         printf("Size %d\n", (int)st.st_size);
 152         printf("Inode %04o\n", (int)st.st_ino);
 153
 154
 155         ret = nfs_close(nfs, nfsfh);
 156         if (ret < 0) {
 157                 printf("Failed to close(%s): %s\n", NFSFILE, nfs_get_error(nfs));
 158                 exit(10);
 159         }
 160
 161         ret = nfs_opendir(nfs, NFSDIR, &nfsdir);
 162         if (ret != 0) {
 163                 printf("Failed to open(%s) %s\n", NFSFILE, nfs_get_error(nfs));
 164                 exit(10);
 165         }
 166         while((nfsdirent = nfs_readdir(nfs, nfsdir)) != NULL) {
 167                 printf("Inode:%d Name:%s\n", (int)nfsdirent->inode, nfsdirent->name);
 168         }
 169         nfs_closedir(nfs, nfsdir);
 170
 171
 172         ret = nfs_open(nfs, NFSFILEW, O_WRONLY, &nfsfh);
 173         if (ret != 0) {
 174                 printf("Failed to open(%s) %s\n", NFSFILEW, nfs_get_error(nfs));
 175                 exit(10);
 176         }
 177         ret = nfs_pwrite(nfs, nfsfh, 0, 16, buf);
 178         if (ret < 0) {
 179                 printf("Failed to pwrite(%s) %s\n", NFSFILEW, nfs_get_error(nfs));
 180                 exit(10);
 181         }
 182         ret = nfs_fsync(nfs, nfsfh);
 183         if (ret < 0) {
 184                 printf("Failed to fsync(%s) %s\n", NFSFILEW, nfs_get_error(nfs));
 185                 exit(10);
 186         }
 187         ret = nfs_close(nfs, nfsfh);
 188         if (ret < 0) {
 189                 printf("Failed to close(%s) %s\n", NFSFILEW, nfs_get_error(nfs));
 190                 exit(10);
 191         }
 192
 193
 194         ret = nfs_statvfs(nfs, NFSDIR, &svfs);
 195         if (ret < 0) {
 196                 printf("Failed to statvfs(%s) %s\n", NFSDIR, nfs_get_error(nfs));
 197                 exit(10);
 198         }
 199         printf("files %d/%d/%d\n", (int)svfs.f_files, (int)svfs.f_ffree, (int)svfs.f_favail);
 200
 201
 202         ret = nfs_access(nfs, NFSFILE, R_OK);
 203         if (ret != 0) {
 204                 printf("Failed to access(%s) %s\n", NFSFILE, nfs_get_error(nfs));
 205         }
 206
 207         /* become root */
 208         nfs_set_auth(nfs, authunix_create("Ronnies-Laptop", 0, 0, 0, NULL));
 209
 210         ret = nfs_link(nfs, NFSFILE, NFSFILER);
 211         if (ret != 0) {
 212                 printf("Failed to link(%s) %s\n", NFSFILE, nfs_get_error(nfs));
 213         }
 214
 215
 216         nfs_destroy_context(nfs);
 217         printf("nfsclient finished\n");
 218         return 0;
 219 }
 220