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/*
Unix SMB/CIFS implementation.
Samba readline wrapper implementation
Copyright (C) Simo Sorce 2001
Copyright (C) Andrew Tridgell 2001
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "pstring.h"
#include "system/filesys.h"
#include "system/select.h"
#include "system/readline.h"
/*******************************************************************
Similar to sys_select() but catch EINTR and continue.
This is what sys_select() used to do in Samba.
********************************************************************/
int sys_select_intr(int maxfd, fd_set *readfds, fd_set *writefds, fd_set *errorfds, struct timeval *tval)
{
int ret;
fd_set *readfds2, readfds_buf, *writefds2, writefds_buf, *errorfds2, errorfds_buf;
struct timeval tval2, *ptval;
readfds2 = (readfds ? &readfds_buf : NULL);
writefds2 = (writefds ? &writefds_buf : NULL);
errorfds2 = (errorfds ? &errorfds_buf : NULL);
ptval = (tval ? &tval2 : NULL);
do {
if (readfds)
readfds_buf = *readfds;
if (writefds)
writefds_buf = *writefds;
if (errorfds)
errorfds_buf = *errorfds;
if (tval)
tval2 = *tval;
/* We must use select and not sys_select here. If we use
sys_select we'd lose the fact a signal occurred when sys_select
read a byte from the pipe. Fix from Mark Weaver
<mark-clist@npsl.co.uk>
*/
ret = select(maxfd, readfds2, writefds2, errorfds2, ptval);
} while (ret == -1 && errno == EINTR);
if (readfds)
*readfds = readfds_buf;
if (writefds)
*writefds = writefds_buf;
if (errorfds)
*errorfds = errorfds_buf;
return ret;
}
/****************************************************************************
Display the prompt and wait for input. Call callback() regularly
****************************************************************************/
static char *smb_readline_replacement(const char *prompt, void (*callback)(void),
char **(completion_fn)(const char *text, int start, int end))
{
fd_set fds;
static pstring line;
struct timeval timeout;
int fd = STDIN_FILENO;
char *ret;
do_debug("%s", prompt);
while (1) {
timeout.tv_sec = 5;
timeout.tv_usec = 0;
FD_ZERO(&fds);
FD_SET(fd,&fds);
if (sys_select_intr(fd+1,&fds,NULL,NULL,&timeout) == 1) {
ret = x_fgets(line, sizeof(line), x_stdin);
return ret;
}
if (callback)
callback();
}
}
/****************************************************************************
Display the prompt and wait for input. Call callback() regularly.
****************************************************************************/
char *smb_readline(const char *prompt, void (*callback)(void),
char **(completion_fn)(const char *text, int start, int end))
{
#if HAVE_LIBREADLINE
if (isatty(STDIN_FILENO)) {
char *ret;
/* Aargh! Readline does bizzare things with the terminal width
that mucks up expect(1). Set CLI_NO_READLINE in the environment
to force readline not to be used. */
if (getenv("CLI_NO_READLINE"))
return smb_readline_replacement(prompt, callback, completion_fn);
if (completion_fn) {
/* The callback prototype has changed slightly between
different versions of Readline, so the same function
works in all of them to date, but we get compiler
warnings in some. */
rl_attempted_completion_function = RL_COMPLETION_CAST completion_fn;
}
#if HAVE_DECL_RL_EVENT_HOOK
if (callback)
rl_event_hook = (Function *)callback;
#endif
ret = readline(prompt);
if (ret && *ret)
add_history(ret);
return ret;
} else
#endif
return smb_readline_replacement(prompt, callback, completion_fn);
}
/****************************************************************************
* return line buffer text
****************************************************************************/
const char *smb_readline_get_line_buffer(void)
{
#if defined(HAVE_LIBREADLINE)
return rl_line_buffer;
#else
return NULL;
#endif
}
/****************************************************************************
* set completion append character
***************************************************************************/
void smb_readline_ca_char(char c)
{
#if defined(HAVE_LIBREADLINE)
rl_completion_append_character = c;
#endif
}
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