diff options
Diffstat (limited to 'source4/lib/smbreadline')
| -rw-r--r-- | source4/lib/smbreadline/readline.m4 | 81 | ||||
| -rw-r--r-- | source4/lib/smbreadline/smbreadline.c | 164 | ||||
| -rw-r--r-- | source4/lib/smbreadline/smbreadline.h | 9 |
3 files changed, 254 insertions, 0 deletions
diff --git a/source4/lib/smbreadline/readline.m4 b/source4/lib/smbreadline/readline.m4 new file mode 100644 index 0000000000..cff7ece126 --- /dev/null +++ b/source4/lib/smbreadline/readline.m4 @@ -0,0 +1,81 @@ +############################################### +# Readline included by default unless explicitly asked not to +test "${with_readline+set}" != "set" && with_readline=yes + +EXTERNAL_READLINE=no +# test for where we get readline() from +AC_MSG_CHECKING(whether to use readline) +AC_ARG_WITH(readline, +[ --with-readline[=DIR] Look for readline include/libs in DIR (default=auto) ], +[ case "$with_readline" in + yes) + AC_MSG_RESULT(yes) + + AC_CHECK_HEADERS(readline.h history.h readline/readline.h) + AC_CHECK_HEADERS(readline/history.h) + + AC_CHECK_HEADERS(readline.h readline/readline.h,[ + for termlib in ncurses curses termcap terminfo termlib tinfo; do + AC_CHECK_LIB(${termlib}, tgetent, [TERMLIBS="-l${termlib}"; break]) + done + AC_CHECK_LIB(readline, rl_callback_handler_install, + [TERMLIBS="-lreadline $TERMLIBS" + EXTERNAL_READLINE=yes + break], [TERMLIBS=], $TERMLIBS)]) + ;; + no) + AC_MSG_RESULT(no) + ;; + *) + AC_MSG_RESULT(yes) + + # Needed for AC_CHECK_HEADERS and AC_CHECK_LIB to look at + # alternate readline path + _ldflags=${LDFLAGS} + _cppflags=${CPPFLAGS} + + # Add additional search path + LDFLAGS="-L$with_readline/lib $LDFLAGS" + CPPFLAGS="-I$with_readline/include $CPPFLAGS" + + AC_CHECK_HEADERS(readline.h history.h readline/readline.h) + AC_CHECK_HEADERS(readline/history.h) + + AC_CHECK_HEADERS(readline.h readline/readline.h,[ + for termlib in ncurses curses termcap terminfo termlib; do + AC_CHECK_LIB(${termlib}, tgetent, [TERMLIBS="-l${termlib}"; break]) + done + AC_CHECK_LIB(readline, rl_callback_handler_install, + [TERMLDFLAGS="-L$with_readline/lib" + TERMCPPFLAGS="-I$with_readline/include" + LDFLAGS="-L$with_readline/lib $LDFLAGS" + CPPFLAGS="-I$with_readline/include $CPPFLAGS" + TERMLIBS="-lreadline $TERMLIBS" + EXTERNAL_READLINE=yes + break], [TERMLIBS= CPPFLAGS=$_cppflags], $TERMLIBS)]) + + ;; + esac], + AC_MSG_RESULT(no) +) + +# The readline API changed slightly from readline3 to readline4, so +# code will generate warnings on one of them unless we have a few +# special cases. +AC_CHECK_LIB(readline, rl_completion_matches, + [AC_DEFINE(HAVE_NEW_LIBREADLINE, 1, + [Do we have rl_completion_matches?])], + [], + [$TERMLIBS]) + +AC_MSG_CHECKING(whether to use extern readline) +if test x"$EXTERNAL_READLINE" = x"yes"; then + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_LIBREADLINE,1,[Whether the system has readline]) + SMB_SUBSYSTEM(SMBREADLINE, [lib/smbreadline/smbreadline.o], [READLINE]) + SMB_EXT_LIB(READLINE, [${TERMLIBS}]) + SMB_ENABLE(READLINE,YES) +else + SMB_SUBSYSTEM(SMBREADLINE, [lib/smbreadline/smbreadline.o], []) + AC_MSG_RESULT(no) +fi diff --git a/source4/lib/smbreadline/smbreadline.c b/source4/lib/smbreadline/smbreadline.c new file mode 100644 index 0000000000..78febf5000 --- /dev/null +++ b/source4/lib/smbreadline/smbreadline.c @@ -0,0 +1,164 @@ +/* + 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 2 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, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +#include "includes.h" +#include "pstring.h" + +#include <unistd.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 (callback) + rl_event_hook = (Function *)callback; + 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 +} + + + diff --git a/source4/lib/smbreadline/smbreadline.h b/source4/lib/smbreadline/smbreadline.h new file mode 100644 index 0000000000..cde2b47a24 --- /dev/null +++ b/source4/lib/smbreadline/smbreadline.h @@ -0,0 +1,9 @@ +#ifndef __SMBREADLINE_H__ +#define __SMBREADLINE_H__ + +char *smb_readline(const char *prompt, void (*callback)(void), + char **(completion_fn)(const char *text, int start, int end)); +const char *smb_readline_get_line_buffer(void); +void smb_readline_ca_char(char c); + +#endif /* __SMBREADLINE_H__ */ |