ssh2/example/sftpdir_nonblock.c
Daniel Stenberg 7ed53e21fd libssh2_session_startup(3) => libssh2_session_handshake(3)
Propagate for the current function in docs and examples.
libssh2_session_startup() is deprecated.
2011-09-09 23:17:04 +02:00

238 lines
6.5 KiB
C

/*
* Sample doing an SFTP directory listing.
*
* The sample code has default values for host name, user name, password and
* path, but you can specify them on the command line like:
*
* "sftpdir 192.168.0.1 user password /tmp/secretdir"
*/
#include "libssh2_config.h"
#include <libssh2.h>
#include <libssh2_sftp.h>
#ifdef HAVE_WINSOCK2_H
# include <winsock2.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif
#ifdef HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif
# ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_ARPA_INET_H
# include <arpa/inet.h>
#endif
#include <sys/types.h>
#include <fcntl.h>
#include <errno.h>
#include <stdio.h>
#include <ctype.h>
int main(int argc, char *argv[])
{
unsigned long hostaddr;
int sock, i, auth_pw = 1;
struct sockaddr_in sin;
const char *fingerprint;
LIBSSH2_SESSION *session;
const char *username="username";
const char *password="password";
const char *sftppath="/tmp/secretdir";
int rc;
#if defined(HAVE_IOCTLSOCKET)
long flag = 1;
#endif
LIBSSH2_SFTP *sftp_session;
LIBSSH2_SFTP_HANDLE *sftp_handle;
#ifdef WIN32
WSADATA wsadata;
WSAStartup(MAKEWORD(2,0), &wsadata);
#endif
if (argc > 1) {
hostaddr = inet_addr(argv[1]);
} else {
hostaddr = htonl(0x7F000001);
}
if(argc > 2) {
username = argv[2];
}
if(argc > 3) {
password = argv[3];
}
if(argc > 4) {
sftppath = argv[4];
}
rc = libssh2_init (0);
if (rc != 0) {
fprintf (stderr, "libssh2 initialization failed (%d)\n", rc);
return 1;
}
/*
* The application code is responsible for creating the socket
* and establishing the connection
*/
sock = socket(AF_INET, SOCK_STREAM, 0);
sin.sin_family = AF_INET;
sin.sin_port = htons(22);
sin.sin_addr.s_addr = hostaddr;
if (connect(sock, (struct sockaddr*)(&sin),
sizeof(struct sockaddr_in)) != 0) {
fprintf(stderr, "failed to connect!\n");
return -1;
}
/* Create a session instance
*/
session = libssh2_session_init();
if(!session)
return -1;
/* Since we have set non-blocking, tell libssh2 we are non-blocking */
libssh2_session_set_blocking(session, 0);
/* ... start it up. This will trade welcome banners, exchange keys,
* and setup crypto, compression, and MAC layers
*/
while ((rc = libssh2_session_handshake(session, sock)) ==
LIBSSH2_ERROR_EAGAIN);
if(rc) {
fprintf(stderr, "Failure establishing SSH session: %d\n", rc);
return -1;
}
/* At this point we havn't yet authenticated. The first thing to do
* is check the hostkey's fingerprint against our known hosts Your app
* may have it hard coded, may go to a file, may present it to the
* user, that's your call
*/
fingerprint = libssh2_hostkey_hash(session, LIBSSH2_HOSTKEY_HASH_SHA1);
printf("Fingerprint: ");
for(i = 0; i < 20; i++) {
printf("%02X ", (unsigned char)fingerprint[i]);
}
printf("\n");
if (auth_pw) {
/* We could authenticate via password */
while ((rc = libssh2_userauth_password(session, username, password)) ==
LIBSSH2_ERROR_EAGAIN);
if (rc) {
fprintf(stderr, "Authentication by password failed.\n");
goto shutdown;
}
} else {
/* Or by public key */
while ((rc = libssh2_userauth_publickey_fromfile(session, username,
"/home/username/.ssh/id_rsa.pub",
"/home/username/.ssh/id_rsa",
password)) == LIBSSH2_ERROR_EAGAIN);
if (rc) {
fprintf(stderr, "\tAuthentication by public key failed\n");
goto shutdown;
}
}
fprintf(stderr, "libssh2_sftp_init()!\n");
do {
sftp_session = libssh2_sftp_init(session);
if ((!sftp_session) && (libssh2_session_last_errno(session) !=
LIBSSH2_ERROR_EAGAIN)) {
fprintf(stderr, "Unable to init SFTP session\n");
goto shutdown;
}
} while (!sftp_session);
fprintf(stderr, "libssh2_sftp_opendir()!\n");
/* Request a dir listing via SFTP */
do {
sftp_handle = libssh2_sftp_opendir(sftp_session, sftppath);
if ((!sftp_handle) && (libssh2_session_last_errno(session) !=
LIBSSH2_ERROR_EAGAIN)) {
fprintf(stderr, "Unable to open dir with SFTP\n");
goto shutdown;
}
} while (!sftp_handle);
fprintf(stderr, "libssh2_sftp_opendir() is done, now receive listing!\n");
do {
char mem[512];
LIBSSH2_SFTP_ATTRIBUTES attrs;
/* loop until we fail */
while ((rc = libssh2_sftp_readdir(sftp_handle, mem, sizeof(mem),
&attrs)) == LIBSSH2_ERROR_EAGAIN) {
;
}
if(rc > 0) {
/* rc is the length of the file name in the mem
buffer */
if(attrs.flags & LIBSSH2_SFTP_ATTR_PERMISSIONS) {
/* this should check what permissions it
is and print the output accordingly */
printf("--fix----- ");
} else {
printf("---------- ");
}
if(attrs.flags & LIBSSH2_SFTP_ATTR_UIDGID) {
printf("%4ld %4ld ", attrs.uid, attrs.gid);
} else {
printf(" - - ");
}
if(attrs.flags & LIBSSH2_SFTP_ATTR_SIZE) {
/* attrs.filesize is an uint64_t according to
the docs but there is no really good and
portable 64bit type for C before C99, and
correspondingly there was no good printf()
option for it... */
printf("%8lld ", attrs.filesize);
}
printf("%s\n", mem);
}
else if (rc == LIBSSH2_ERROR_EAGAIN) {
/* blocking */
fprintf(stderr, "Blocking\n");
} else {
break;
}
} while (1);
libssh2_sftp_closedir(sftp_handle);
libssh2_sftp_shutdown(sftp_session);
shutdown:
libssh2_session_disconnect(session, "Normal Shutdown, Thank you for playing");
libssh2_session_free(session);
#ifdef WIN32
closesocket(sock);
#else
close(sock);
#endif
printf("all done\n");
libssh2_exit();
return 0;
}