/*
   Copyright (c) 2010-2012 Red Hat, Inc. <http://www.redhat.com>
   This file is part of GlusterFS.

   This file is licensed to you under your choice of the GNU Lesser
   General Public License, version 3 or any later version (LGPLv3 or
   later), or the GNU General Public License, version 2 (GPLv2), in all
   cases as published by the Free Software Foundation.
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdint.h>
#include <pthread.h>

#ifndef _CONFIG_H
#define _CONFIG_H
#include "config.h"
#endif

#include "cli.h"
#include "cli-mem-types.h"

#define CMDBUFSIZ 1024

void *
cli_batch (void *d)
{
        struct cli_state *state = NULL;
        int               ret = 0;

        state = d;

        ret = cli_cmd_process (state, state->argc, state->argv);

        gf_log ("", GF_LOG_INFO, "Exiting with: %d", ret);
        exit (-ret);

        return NULL;
}


void *
cli_input (void *d)
{
        struct cli_state *state = NULL;
        int               ret = 0;
        char              cmdbuf[CMDBUFSIZ];
        char             *cmd = NULL;
        size_t            len = 0;

        state = d;

        for (;;) {
                printf ("%s", state->prompt);

                cmd = fgets (cmdbuf, CMDBUFSIZ, stdin);
                if (!cmd)
                        break;
                len = strlen(cmd);
                if (len > 0 && cmd[len - 1] == '\n') //strip trailing \n
                        cmd[len - 1] = '\0';
                ret = cli_cmd_process_line (state, cmd);
                if (ret != 0 && state->mode & GLUSTER_MODE_ERR_FATAL)
                        break;
        }

        exit (-ret);

        return NULL;
}


int
cli_input_init (struct cli_state *state)
{
        int  ret = 0;

        if (state->argc) {
                ret = pthread_create (&state->input, NULL, cli_batch, state);
                return ret;
        }

        if (isatty (STDIN_FILENO)) {
                state->prompt = "gluster> ";

                cli_rl_enable (state);
        } else {
                state->prompt = "";
                state->mode = GLUSTER_MODE_SCRIPT | GLUSTER_MODE_ERR_FATAL;
        }

        if (!state->rl_enabled)
                ret = pthread_create (&state->input, NULL, cli_input, state);

        return ret;
}
og message and
jumps to a label called \texttt{err} after setting op\_ret and op\_errno
appropriately. It is recommended to use this template.

\vspace{2ex}

\textsl{Good}:

\begin{verbatim}
        VALIDATE(frame);
        VALIDATE(this);
        VALIDATE(inode);
\end{verbatim}

\section*{$\bullet$ Never rely on precedence of operators}
Never write code that relies on the precedence of operators to execute
correctly.  Such code can be hard to read and someone else might not
know the precedence of operators as accurately as you do.
\vspace{2ex}

\textsl{Bad}:

\begin{verbatim}
        if (op_ret == -1 && errno != ENOENT)
\end{verbatim}

\textsl{Good}:

\begin{verbatim}
        if ((op_ret == -1) && (errno != ENOENT))
\end{verbatim}

\section*{$\bullet$ Use exactly matching types}
Use a variable of the exact type declared in the manual to hold the
return value of a function. Do not use an ``equivalent'' type.

\vspace{2ex}

\textsl{Bad}:

\begin{verbatim}
        int len = strlen (path);
\end{verbatim}

\textsl{Good}:

\begin{verbatim}
        size_t len = strlen (path);
\end{verbatim}

\section*{$\bullet$ Never write code such as \texttt{foo->bar->baz}; check every pointer}
Do not write code that blindly follows a chain of pointer
references. Any pointer in the chain may be \texttt{NULL} and thus
cause a crash. Verify that each pointer is non-null before following
it.

\se