libssh/examples/exec.c

/* simple exec example */
#include <stdio.h>

#include <libssh/libssh.h>
#include "examples_common.h"

int main(void) {
    ssh_session session;
    ssh_channel channel;
    char buffer[256];
    int nbytes;
    int rc;

    session = connect_ssh("localhost", NULL, 0);
    if (session == NULL) {
        ssh_finalize();
        return 1;
    }

    channel = ssh_channel_new(session);;
    if (channel == NULL) {
        ssh_disconnect(session);
        ssh_free(session);
        ssh_finalize();
        return 1;
    }

    rc = ssh_channel_open_session(channel);
    if (rc < 0) {
        goto failed;
    }

    rc = ssh_channel_request_exec(channel, "lsof");
    if (rc < 0) {
        goto failed;
    }

    nbytes = ssh_channel_read(channel, buffer, sizeof(buffer), 0);
    while (nbytes > 0) {
        if (fwrite(buffer, 1, nbytes, stdout) != (unsigned int) nbytes) {
            goto failed;
        }
        nbytes = ssh_channel_read(channel, buffer, sizeof(buffer), 0);
    }

    if (nbytes < 0) {
        goto failed;
    }

    ssh_channel_send_eof(channel);
    ssh_channel_close(channel);
    ssh_channel_free(channel);
    ssh_disconnect(session);
    ssh_free(session);
    ssh_finalize();

    return 0;
failed:
    ssh_channel_close(channel);
    ssh_channel_free(channel);
    ssh_disconnect(session);
    ssh_free(session);
    ssh_finalize();

    return 1;
}