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tidy-up: example, tests continued

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- fix skip auth if `userauthlist` is NULL.
  Closes #836 (Reported-by: @sudipm-mukherjee on github)
- fix most silenced `checksrc` warnings.
- sync examples/tests code between each other.
  (output messages, error handling, declaration order, comments)
- stop including unnecessary headers.
- always deinitialize in case of error.
- drop some redundant variables.
- add error handling where missing.
- show more error codes.
- switch `perror()` to `fprintf()`.
- fix some `printf()`s to be `fprintf()`.
- formatting.

Closes #960
This commit is contained in:
Viktor Szakats
2023-04-14 11:05:21 +00:00
parent 0162d1649c
commit 2efdb6747a
51 changed files with 1550 additions and 1289 deletions
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70
example/sftp_mkdir_nonblock.c
View File

@ -4,7 +4,7 @@
* The sample code has default values for host name, user name, password
* and path to copy, but you can specify them on the command line like:
*
* "sftp 192.168.0.1 user password /tmp/sftp_write_nonblock.c"
* $ ./sftp_mkdir_nonblock 192.168.0.1 user password /tmp/sftp_write_nonblock.c
*/
#include "libssh2_setup.h"
@ -30,6 +30,12 @@
#include <stdio.h>
#include <ctype.h>
static const char *pubkey = "/home/username/.ssh/id_rsa.pub";
static const char *privkey = "/home/username/.ssh/id_rsa";
static const char *username = "username";
static const char *password = "password";
static const char *sftppath = "/tmp/sftp_mkdir_nonblock";
int main(int argc, char *argv[])
{
uint32_t hostaddr;
@ -37,22 +43,16 @@ int main(int argc, char *argv[])
int i, auth_pw = 1;
struct sockaddr_in sin;
const char *fingerprint;
LIBSSH2_SESSION *session;
const char *pubkey = "/home/username/.ssh/id_rsa.pub";
const char *privkey = "/home/username/.ssh/id_rsa";
const char *username = "username";
const char *password = "password";
const char *sftppath = "/tmp/sftp_mkdir_nonblock";
int rc;
LIBSSH2_SESSION *session = NULL;
LIBSSH2_SFTP *sftp_session;
#ifdef WIN32
WSADATA wsadata;
int err;
err = WSAStartup(MAKEWORD(2, 0), &wsadata);
if(err != 0) {
fprintf(stderr, "WSAStartup failed with error: %d\n", err);
rc = WSAStartup(MAKEWORD(2, 0), &wsadata);
if(rc) {
fprintf(stderr, "WSAStartup failed with error: %d\n", rc);
return 1;
}
#endif
@ -74,7 +74,7 @@ int main(int argc, char *argv[])
}
rc = libssh2_init(0);
if(rc != 0) {
if(rc) {
fprintf(stderr, "libssh2 initialization failed (%d)\n", rc);
return 1;
}
@ -84,20 +84,25 @@ int main(int argc, char *argv[])
* and establishing the connection
*/
sock = socket(AF_INET, SOCK_STREAM, 0);
if(sock == LIBSSH2_INVALID_SOCKET) {
fprintf(stderr, "failed to create socket!\n");
goto shutdown;
}
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))) {
fprintf(stderr, "failed to connect!\n");
return -1;
goto shutdown;
}
/* Create a session instance
*/
/* Create a session instance */
session = libssh2_session_init();
if(!session)
return -1;
if(!session) {
fprintf(stderr, "Could not initialize SSH session!\n");
goto shutdown;
}
/* ... start it up. This will trade welcome banners, exchange keys,
* and setup crypto, compression, and MAC layers
@ -105,7 +110,7 @@ int main(int argc, char *argv[])
rc = libssh2_session_handshake(session, sock);
if(rc) {
fprintf(stderr, "Failure establishing SSH session: %d\n", rc);
return -1;
goto shutdown;
}
/* At this point we have not yet authenticated. The first thing to do
@ -123,7 +128,7 @@ int main(int argc, char *argv[])
if(auth_pw) {
/* We could authenticate via password */
if(libssh2_userauth_password(session, username, password)) {
fprintf(stderr, "Authentication by password failed.\n");
fprintf(stderr, "Authentication by password failed!\n");
goto shutdown;
}
}
@ -132,12 +137,11 @@ int main(int argc, char *argv[])
if(libssh2_userauth_publickey_fromfile(session, username,
pubkey, privkey,
password)) {
fprintf(stderr, "\tAuthentication by public key failed\n");
fprintf(stderr, "Authentication by public key failed!\n");
goto shutdown;
}
}
fprintf(stderr, "libssh2_sftp_init()!\n");
sftp_session = libssh2_sftp_init(session);
if(!sftp_session) {
@ -148,26 +152,32 @@ int main(int argc, char *argv[])
/* Since we have set non-blocking, tell libssh2 we are non-blocking */
libssh2_session_set_blocking(session, 0);
fprintf(stderr, "libssh2_sftp_mkdirnb()!\n");
/* Make a directory via SFTP */
while(libssh2_sftp_mkdir(sftp_session, sftppath,
LIBSSH2_SFTP_S_IRWXU|
LIBSSH2_SFTP_S_IRGRP|LIBSSH2_SFTP_S_IXGRP|
LIBSSH2_SFTP_S_IROTH|LIBSSH2_SFTP_S_IXOTH)
== LIBSSH2_ERROR_EAGAIN);
LIBSSH2_SFTP_S_IRWXU |
LIBSSH2_SFTP_S_IRGRP |
LIBSSH2_SFTP_S_IXGRP |
LIBSSH2_SFTP_S_IROTH |
LIBSSH2_SFTP_S_IXOTH) ==
LIBSSH2_ERROR_EAGAIN);
libssh2_sftp_shutdown(sftp_session);
shutdown:
libssh2_session_disconnect(session, "Normal Shutdown");
libssh2_session_free(session);
if(session) {
libssh2_session_disconnect(session, "Normal Shutdown");
libssh2_session_free(session);
}
if(sock != LIBSSH2_INVALID_SOCKET) {
#ifdef WIN32
closesocket(sock);
closesocket(sock);
#else
close(sock);
close(sock);
#endif
}
fprintf(stderr, "all done\n");
libssh2_exit();