如何登录远程SSH服务器并发送命令与libssh和[C]

Question

有人可以帮我登录到SSH并发送简单的ls命令？这里是我的代码：

你能帮我吗？这里是我的代码：

#include <libssh/libssh.h> 
#include <stdlib.h> 
#include <stdio.h> 
int main() 
{ 
    ssh_session my_ssh_session; 
    int verbosity = SSH_LOG_PROTOCOL; 
    int rc; 
    int port = 22; 
    char user = "root"; 
    char pass = "password"; 
    my_ssh_session = ssh_new(); 
    if (my_ssh_session == NULL) 
    exit(-1); 
    ssh_options_set(my_ssh_session, SSH_OPTIONS_HOST, "192.168.1.100"); 
    ssh_options_set(my_ssh_session, SSH_OPTIONS_PORT, &port); 
    ssh_options_set(my_ssh_session, SSH_OPTIONS_USER, user); 
    ssh_options_set(my_ssh_session, SSH_OPTIONS_LOG_VERBOSITY, &verbosity); 

    rc = ssh_userauth_password(my_ssh_session,NULL,pass); 
    if (rc == SSH_AUTH_ERROR) 
    { 
    fprintf(stderr, "Error connecting to localhost: %s\n", 
      ssh_get_error(my_ssh_session)); 
    exit(-1); 
    } 


    rc = ssh_channel_request_exec(my_ssh_session, "ls -l"); 
    if (rc != SSH_OK) 
    { 
    ssh_channel_close(my_ssh_session); 
    ssh_channel_free(my_ssh_session); 
    return rc; 
    } 

    ssh_disconnect(my_ssh_session); 
    ssh_free(my_ssh_session); 

} 

这里是上面的代码回报，同时建设：

"/usr/bin/gmake" -f nbproject/Makefile-Debug.mk QMAKE= SUBPROJECTS= .build-conf 
gmake[1]: Entering directory `/root/NetBeansProjects/SSH connect' 
"/usr/bin/gmake" -f nbproject/Makefile-Debug.mk dist/Debug/GNU-Linux-x86/ssh_connect 
gmake[2]: Entering directory `/root/NetBeansProjects/SSH connect' 
mkdir -p build/Debug/GNU-Linux-x86 
rm -f "build/Debug/GNU-Linux-x86/main.o.d" 
gcc -lssh -c -g -MMD -MP -MF "build/Debug/GNU-Linux-x86/main.o.d" -o build/Debug/GNU-Linux-x86/main.o main.c 
main.c: In function 'main': 
main.c:10:15: warning: initialization makes integer from pointer without a cast [enabled by default] 
    char user = "root"; 
      ^
main.c:11:15: warning: initialization makes integer from pointer without a cast [enabled by default] 
    char pass = "password"; 
      ^
main.c:17:3: warning: passing argument 3 of 'ssh_options_set' makes pointer from integer without a cast [enabled by default] 
    ssh_options_set(my_ssh_session, SSH_OPTIONS_USER, user); 
^
In file included from main.c:1:0: 
/usr/include/libssh/libssh.h:406:16: note: expected 'const void *' but argument is of type 'char' 
LIBSSH_API int ssh_options_set(ssh_session session, enum ssh_options_e type, 
       ^
main.c:20:3: warning: passing argument 3 of 'ssh_userauth_password' makes pointer from integer without a cast [enabled by default] 
    rc = ssh_userauth_password(my_ssh_session,NULL,pass); 
^
In file included from main.c:1:0: 
/usr/include/libssh/libssh.h:456:16: note: expected 'const char *' but argument is of type 'char' 
LIBSSH_API int ssh_userauth_password(ssh_session session, const char *username, const char *password); 
       ^
main.c:29:3: warning: passing argument 1 of 'ssh_channel_request_exec' from incompatible pointer type [enabled by default] 
    rc = ssh_channel_request_exec(my_ssh_session, "ls -l"); 
^
In file included from main.c:1:0: 
/usr/include/libssh/libssh.h:345:16: note: expected 'ssh_channel' but argument is of type 'ssh_session' 
LIBSSH_API int ssh_channel_request_exec(ssh_channel channel, const char *cmd); 
       ^
main.c:32:5: warning: passing argument 1 of 'ssh_channel_close' from incompatible pointer type [enabled by default] 
    ssh_channel_close(my_ssh_session); 
    ^
In file included from main.c:1:0: 
/usr/include/libssh/libssh.h:329:16: note: expected 'ssh_channel' but argument is of type 'ssh_session' 
LIBSSH_API int ssh_channel_close(ssh_channel channel); 
       ^
main.c:33:5: warning: passing argument 1 of 'ssh_channel_free' from incompatible pointer type [enabled by default] 
    ssh_channel_free(my_ssh_session); 
    ^
In file included from main.c:1:0: 
/usr/include/libssh/libssh.h:330:17: note: expected 'ssh_channel' but argument is of type 'ssh_session' 
LIBSSH_API void ssh_channel_free(ssh_channel channel); 
       ^
mkdir -p dist/Debug/GNU-Linux-x86 
gcc -lssh -o dist/Debug/GNU-Linux-x86/ssh_connect build/Debug/GNU-Linux-x86/main.o 
gmake[2]: Leaving directory `/root/NetBeansProjects/SSH connect' 
gmake[1]: Leaving directory `/root/NetBeansProjects/SSH connect' 

BUILD SUCCESSFUL (total time: 114ms) 

我只是婉登录并执行ls命令......

Answer 1

这个工作对我来说：

#include <libssh/libssh.h> 
#include <stdlib.h> 
#include <stdio.h> 

void free_channel(ssh_channel channel) { 
    ssh_channel_send_eof(channel); 
    ssh_channel_close(channel); 
    ssh_channel_free(channel); 
} 

void free_session(ssh_session session) { 
    ssh_disconnect(session); 
    ssh_free(session); 
} 

void error(ssh_session session) { 
    fprintf(stderr, "Error: %s\n", ssh_get_error(session)); 
    free_session(session); 
    exit(-1); 
} 

int main() { 

    ssh_session session; 
    ssh_channel channel; 
    int rc, port = 22; 
    char buffer[1024]; 
    unsigned int nbytes; 

    printf("Session...\n"); 
    session = ssh_new(); 
    if (session == NULL) exit(-1); 

    ssh_options_set(session, SSH_OPTIONS_HOST, "localhost"); 
    ssh_options_set(session, SSH_OPTIONS_PORT, &port); 
    ssh_options_set(session, SSH_OPTIONS_USER, "root"); 

    printf("Connecting...\n"); 
    rc = ssh_connect(session); 
    if (rc != SSH_OK) error(session); 

    printf("Password Autentication...\n"); 
    rc = ssh_userauth_password(session, NULL, "root"); 
    if (rc != SSH_AUTH_SUCCESS) error(session); 

    printf("Channel...\n"); 
    channel = ssh_channel_new(session); 
    if (channel == NULL) exit(-1); 

    printf("Opening...\n"); 
    rc = ssh_channel_open_session(channel); 
    if (rc != SSH_OK) error(session); 

    printf("Executing remote command...\n"); 
    rc = ssh_channel_request_exec(channel, "ls -l"); 
    if (rc != SSH_OK) error(session); 

    printf("Received:\n"); 
    nbytes = ssh_channel_read(channel, buffer, sizeof(buffer), 0); 
    while (nbytes > 0) { 
     fwrite(buffer, 1, nbytes, stdout); 
     nbytes = ssh_channel_read(channel, buffer, sizeof(buffer), 0); 
    } 

    free_channel(channel); 
    free_session(session); 

    return 0; 
}