Minimal example to test which shell is used by `ssh_channel_request_exec`

ssh_example.cpp

#include <libssh/libssh.h>
#include <iostream>
#include <cstring>

int main() {
    // Create SSH session
    ssh_session session = ssh_new();
    if (!session) {
        std::cerr << "Failed to create SSH session" << std::endl;
        return 1;
    }

    // Set connection options
    ssh_options_set(session, SSH_OPTIONS_HOST, "your_hostname");
    ssh_options_set(session, SSH_OPTIONS_USER, "your_username");

    // Connect to server
    if (ssh_connect(session) != SSH_OK) {
        std::cerr << "Connection failed: " << ssh_get_error(session) << std::endl;
        ssh_free(session);
        return 1;
    }

    // Authenticate using private key
    int auth = ssh_userauth_autopubkey(session, nullptr);
    if (auth != SSH_AUTH_SUCCESS) {
        std::cerr << "Authentication failed: " << ssh_get_error(session) << std::endl;
        ssh_disconnect(session);
        ssh_free(session);
        return 1;
    }

    // Create channel
    ssh_channel channel = ssh_channel_new(session);
    if (!channel) {
        std::cerr << "Channel creation failed: " << ssh_get_error(session) << std::endl;
        ssh_disconnect(session);
        ssh_free(session);
        return 1;
    }

    // Open channel session
    if (ssh_channel_open_session(channel) != SSH_OK) {
        std::cerr << "Channel open failed: " << ssh_get_error(session) << std::endl;
        ssh_channel_free(channel);
        ssh_disconnect(session);
        ssh_free(session);
        return 1;
    }

    // Execute remote command
    if (ssh_channel_request_exec(channel, "echo $0") != SSH_OK) {
        std::cerr << "Command execution failed: " << ssh_get_error(session) << std::endl;
        ssh_channel_close(channel);
        ssh_channel_free(channel);
        ssh_disconnect(session);
        ssh_free(session);
        return 1;
    }

    // Read and print output
    char buffer[256];
    int nbytes;
    while ((nbytes = ssh_channel_read(channel, buffer, sizeof(buffer), 0)) > 0) {
        std::cout.write(buffer, nbytes);
    }

    // Cleanup
    ssh_channel_send_eof(channel);
    ssh_channel_close(channel);
    ssh_channel_free(channel);
    ssh_disconnect(session);
    ssh_free(session);

    return 0;
}

Replace the placeholders:

• your_hostname with your SSH server hostname/IP
• your_username with your SSH username

Compile with:

g++ -o ssh_example ssh_example.cpp -lssh