266 строки
8.0 KiB
C
266 строки
8.0 KiB
C
/*
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Copyright 2003-2009 Aris Adamantiadis
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This file is part of the SSH Library
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You are free to copy this file, modify it in any way, consider it being public
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domain. This does not apply to the rest of the library though, but it is
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allowed to cut-and-paste working code from this file to any license of
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program.
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The goal is to show the API in action. It's not a reference on how terminal
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clients must be made or how a client should react.
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*/
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#include "config.h"
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#include <sys/statvfs.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <string.h>
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#include <libssh/libssh.h>
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#include <libssh/sftp.h>
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#include "examples_common.h"
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#ifdef WITH_SFTP
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int verbosity;
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char *destination;
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#define DATALEN 65536
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static void do_sftp(ssh_session session){
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sftp_session sftp=sftp_new(session);
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sftp_dir dir;
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sftp_attributes file;
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sftp_statvfs_t sftpstatvfs;
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struct statvfs sysstatvfs;
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sftp_file fichier;
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sftp_file to;
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int len=1;
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unsigned int i;
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char data[DATALEN]={0};
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char *lnk;
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unsigned int count;
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if(!sftp){
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fprintf(stderr, "sftp error initialising channel: %s\n",
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ssh_get_error(session));
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return;
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}
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if(sftp_init(sftp)){
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fprintf(stderr, "error initialising sftp: %s\n",
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ssh_get_error(session));
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return;
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}
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printf("Additional SFTP extensions provided by the server:\n");
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count = sftp_extensions_get_count(sftp);
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for (i = 0; i < count; i++) {
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printf("\t%s, version: %s\n",
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sftp_extensions_get_name(sftp, i),
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sftp_extensions_get_data(sftp, i));
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}
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/* test symlink and readlink */
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if (sftp_symlink(sftp, "/tmp/this_is_the_link",
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"/tmp/sftp_symlink_test") < 0) {
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fprintf(stderr, "Could not create link (%s)\n", ssh_get_error(session));
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return;
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}
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lnk = sftp_readlink(sftp, "/tmp/sftp_symlink_test");
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if (lnk == NULL) {
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fprintf(stderr, "Could not read link (%s)\n", ssh_get_error(session));
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return;
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}
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printf("readlink /tmp/sftp_symlink_test: %s\n", lnk);
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sftp_unlink(sftp, "/tmp/sftp_symlink_test");
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if (sftp_extension_supported(sftp, "statvfs@openssh.com", "2")) {
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sftpstatvfs = sftp_statvfs(sftp, "/tmp");
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if (sftpstatvfs == NULL) {
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fprintf(stderr, "statvfs failed (%s)\n", ssh_get_error(session));
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return;
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}
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printf("sftp statvfs:\n"
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"\tfile system block size: %llu\n"
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"\tfundamental fs block size: %llu\n"
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"\tnumber of blocks (unit f_frsize): %llu\n"
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"\tfree blocks in file system: %llu\n"
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"\tfree blocks for non-root: %llu\n"
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"\ttotal file inodes: %llu\n"
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"\tfree file inodes: %llu\n"
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"\tfree file inodes for to non-root: %llu\n"
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"\tfile system id: %llu\n"
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"\tbit mask of f_flag values: %llu\n"
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"\tmaximum filename length: %llu\n",
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(unsigned long long) sftpstatvfs->f_bsize,
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(unsigned long long) sftpstatvfs->f_frsize,
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(unsigned long long) sftpstatvfs->f_blocks,
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(unsigned long long) sftpstatvfs->f_bfree,
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(unsigned long long) sftpstatvfs->f_bavail,
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(unsigned long long) sftpstatvfs->f_files,
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(unsigned long long) sftpstatvfs->f_ffree,
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(unsigned long long) sftpstatvfs->f_favail,
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(unsigned long long) sftpstatvfs->f_fsid,
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(unsigned long long) sftpstatvfs->f_flag,
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(unsigned long long) sftpstatvfs->f_namemax);
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sftp_statvfs_free(sftpstatvfs);
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if (statvfs("/tmp", &sysstatvfs) < 0) {
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fprintf(stderr, "statvfs failed (%s)\n", strerror(errno));
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return;
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}
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printf("sys statvfs:\n"
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"\tfile system block size: %llu\n"
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"\tfundamental fs block size: %llu\n"
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"\tnumber of blocks (unit f_frsize): %llu\n"
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"\tfree blocks in file system: %llu\n"
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"\tfree blocks for non-root: %llu\n"
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"\ttotal file inodes: %llu\n"
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"\tfree file inodes: %llu\n"
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"\tfree file inodes for to non-root: %llu\n"
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"\tfile system id: %llu\n"
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"\tbit mask of f_flag values: %llu\n"
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"\tmaximum filename length: %llu\n",
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(unsigned long long) sysstatvfs.f_bsize,
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(unsigned long long) sysstatvfs.f_frsize,
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(unsigned long long) sysstatvfs.f_blocks,
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(unsigned long long) sysstatvfs.f_bfree,
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(unsigned long long) sysstatvfs.f_bavail,
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(unsigned long long) sysstatvfs.f_files,
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(unsigned long long) sysstatvfs.f_ffree,
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(unsigned long long) sysstatvfs.f_favail,
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(unsigned long long) sysstatvfs.f_fsid,
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(unsigned long long) sysstatvfs.f_flag,
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(unsigned long long) sysstatvfs.f_namemax);
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}
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/* the connection is made */
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/* opening a directory */
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dir=sftp_opendir(sftp,"./");
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if(!dir) {
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fprintf(stderr, "Directory not opened(%s)\n", ssh_get_error(session));
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return ;
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}
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/* reading the whole directory, file by file */
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while((file=sftp_readdir(sftp,dir))){
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fprintf(stderr, "%30s(%.8o) : %s(%.5d) %s(%.5d) : %.10llu bytes\n",
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file->name,
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file->permissions,
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file->owner,
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file->uid,
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file->group,
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file->gid,
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(long long unsigned int) file->size);
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sftp_attributes_free(file);
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}
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/* when file=NULL, an error has occured OR the directory listing is end of file */
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if(!sftp_dir_eof(dir)){
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fprintf(stderr, "Error: %s\n", ssh_get_error(session));
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return;
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}
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if(sftp_closedir(dir)){
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fprintf(stderr, "Error: %s\n", ssh_get_error(session));
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return;
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}
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/* this will open a file and copy it into your /home directory */
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/* the small buffer size was intended to stress the library. of course, you can use a buffer till 20kbytes without problem */
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fichier=sftp_open(sftp,"/usr/bin/ssh",O_RDONLY, 0);
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if(!fichier){
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fprintf(stderr, "Error opening /usr/bin/ssh: %s\n",
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ssh_get_error(session));
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return;
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}
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/* open a file for writing... */
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to=sftp_open(sftp,"ssh-copy",O_WRONLY | O_CREAT, 0700);
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if(!to){
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fprintf(stderr, "Error opening ssh-copy for writing: %s\n",
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ssh_get_error(session));
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return;
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}
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while((len=sftp_read(fichier,data,4096)) > 0){
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if(sftp_write(to,data,len)!=len){
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fprintf(stderr, "Error writing %d bytes: %s\n",
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len, ssh_get_error(session));
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return;
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}
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}
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printf("finished\n");
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if(len<0)
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fprintf(stderr, "Error reading file: %s\n", ssh_get_error(session));
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sftp_close(fichier);
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sftp_close(to);
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printf("fichiers ferm\n");
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to=sftp_open(sftp,"/tmp/grosfichier",O_WRONLY|O_CREAT, 0644);
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for(i=0;i<1000;++i){
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len=sftp_write(to,data,DATALEN);
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printf("wrote %d bytes\n",len);
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if(len != DATALEN){
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printf("chunk %d : %d (%s)\n",i,len,ssh_get_error(session));
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}
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}
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sftp_close(to);
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/* close the sftp session */
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sftp_free(sftp);
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printf("sftp session terminated\n");
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}
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static void usage(const char *argv0){
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fprintf(stderr,"Usage : %s [-v] remotehost\n"
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"sample sftp test client - libssh-%s\n"
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"Options :\n"
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" -v : increase log verbosity\n",
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argv0,
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ssh_version(0));
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exit(0);
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}
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static int opts(int argc, char **argv){
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int i;
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while((i=getopt(argc,argv,"v"))!=-1){
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switch(i){
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case 'v':
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verbosity++;
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break;
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default:
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fprintf(stderr,"unknown option %c\n",optopt);
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usage(argv[0]);
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return -1;
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}
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}
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destination=argv[optind];
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if(destination == NULL){
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usage(argv[0]);
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return -1;
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}
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return 0;
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}
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int main(int argc, char **argv){
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ssh_session session;
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if(opts(argc,argv)<0)
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return EXIT_FAILURE;
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session=connect_ssh(destination,NULL,verbosity);
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if(session == NULL)
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return EXIT_FAILURE;
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do_sftp(session);
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ssh_disconnect(session);
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ssh_free(session);
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return 0;
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}
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#endif
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