/* input.c -- character input functions for readline. */
-/* Copyright (C) 1994-2005 Free Software Foundation, Inc.
+/* Copyright (C) 1994-2017 Free Software Foundation, Inc.
- This file is part of the GNU Readline Library, a library for
- reading lines of text with interactive input and history editing.
+ This file is part of the GNU Readline Library (Readline), a library
+ for reading lines of text with interactive input and history editing.
- The GNU Readline Library 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, or
+ Readline 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.
- The GNU Readline Library 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
+ Readline 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.
- The GNU General Public License is often shipped with GNU software, and
- is generally kept in a file called COPYING or LICENSE. If you do not
- have a copy of the license, write to the Free Software Foundation,
- 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
+ You should have received a copy of the GNU General Public License
+ along with Readline. If not, see <http://www.gnu.org/licenses/>.
+*/
+
#define READLINE_LIBRARY
#if defined (__TANDEM)
# include "ansi_stdlib.h"
#endif /* HAVE_STDLIB_H */
-#if defined (HAVE_SELECT)
-# if !defined (HAVE_SYS_SELECT_H) || !defined (M_UNIX)
-# include <sys/time.h>
-# endif
-#endif /* HAVE_SELECT */
-#if defined (HAVE_SYS_SELECT_H)
-# include <sys/select.h>
-#endif
+#include <signal.h>
+
+#include "posixselect.h"
#if defined (FIONREAD_IN_SYS_IOCTL)
# include <sys/ioctl.h>
# define O_NDELAY O_NONBLOCK /* Posix style */
#endif
+#if defined (HAVE_PSELECT)
+extern sigset_t _rl_orig_sigset;
+#endif
+
/* Non-null means it is a pointer to a function to run while waiting for
character input. */
rl_hook_func_t *rl_event_hook = (rl_hook_func_t *)NULL;
+/* A function to call if a read(2) is interrupted by a signal. */
+rl_hook_func_t *rl_signal_event_hook = (rl_hook_func_t *)NULL;
+
+/* A function to replace _rl_input_available for applications using the
+ callback interface. */
+rl_hook_func_t *rl_input_available_hook = (rl_hook_func_t *)NULL;
+
rl_getc_func_t *rl_getc_function = rl_getc;
static int _keyboard_input_timeout = 100000; /* 0.1 seconds; it's in usec */
static int rl_get_char PARAMS((int *));
static int rl_gather_tyi PARAMS((void));
+#if defined (_WIN32) && !defined (__CYGWIN__)
+
+/* 'isatty' in the Windows runtime returns non-zero for every
+ character device, including the null device. Repair that. */
+#include <io.h>
+#include <conio.h>
+#define WIN32_LEAN_AND_MEAN 1
+#include <windows.h>
+
+int w32_isatty (int fd)
+{
+ if (_isatty(fd))
+ {
+ HANDLE h;
+ DWORD ignored;
+
+ if ((h = (HANDLE) _get_osfhandle (fd)) == INVALID_HANDLE_VALUE)
+ {
+ errno = EBADF;
+ return 0;
+ }
+ if (GetConsoleMode (h, &ignored) != 0)
+ return 1;
+ }
+ errno = ENOTTY;
+ return 0;
+}
+
+#define isatty(x) w32_isatty(x)
+#endif
+
/* **************************************************************** */
/* */
/* Character Input Buffering */
#define any_typein (push_index != pop_index)
int
-_rl_any_typein ()
+_rl_any_typein (void)
{
return any_typein;
}
+int
+_rl_pushed_input_available (void)
+{
+ return (push_index != pop_index);
+}
+
/* Return the amount of space available in the buffer for stuffing
characters. */
static int
-ibuffer_space ()
+ibuffer_space (void)
{
if (pop_index > push_index)
return (pop_index - push_index - 1);
/* Get a key from the buffer of characters to be read.
Return the key in KEY.
- Result is KEY if there was a key, or 0 if there wasn't. */
+ Result is non-zero if there was a key, or 0 if there wasn't. */
static int
-rl_get_char (key)
- int *key;
+rl_get_char (int *key)
{
if (push_index == pop_index)
return (0);
*key = ibuffer[pop_index++];
-
+#if 0
if (pop_index >= ibuffer_len)
+#else
+ if (pop_index > ibuffer_len)
+#endif
pop_index = 0;
return (1);
Returns non-zero if successful, zero if there is
no space left in the buffer. */
int
-_rl_unget_char (key)
- int key;
+_rl_unget_char (int key)
{
if (ibuffer_space ())
{
pop_index--;
if (pop_index < 0)
- pop_index = ibuffer_len - 1;
+ pop_index = ibuffer_len;
ibuffer[pop_index] = key;
return (1);
}
return (0);
}
-int
-_rl_pushed_input_available ()
-{
- return (push_index != pop_index);
-}
-
/* If a character is available to be read, then read it and stuff it into
IBUFFER. Otherwise, just return. Returns number of characters read
(0 if none available) and -1 on error (EIO). */
static int
-rl_gather_tyi ()
+rl_gather_tyi (void)
{
int tty;
register int tem, result;
struct timeval timeout;
#endif
+ chars_avail = 0;
+ input = 0;
tty = fileno (rl_instream);
#if defined (HAVE_SELECT)
FD_ZERO (&exceptfds);
FD_SET (tty, &readfds);
FD_SET (tty, &exceptfds);
- timeout.tv_sec = 0;
- timeout.tv_usec = _keyboard_input_timeout;
+ USEC_TO_TIMEVAL (_keyboard_input_timeout, timeout);
result = select (tty + 1, &readfds, (fd_set *)NULL, &exceptfds, &timeout);
if (result <= 0)
return 0; /* Nothing to read. */
#endif
result = -1;
-#if defined (FIONREAD)
errno = 0;
+#if defined (FIONREAD)
result = ioctl (tty, FIONREAD, &chars_avail);
if (result == -1 && errno == EIO)
return -1;
+ if (result == -1)
+ chars_avail = 0;
#endif
#if defined (O_NDELAY)
fcntl (tty, F_SETFL, tem);
if (chars_avail == -1 && errno == EAGAIN)
return 0;
+ if (chars_avail == -1 && errno == EIO)
+ return -1;
if (chars_avail == 0) /* EOF */
{
rl_stuff_char (EOF);
#endif /* O_NDELAY */
#if defined (__MINGW32__)
- /* We use getch to read console input, so use the same
- mechanism to check for more. Otherwise, we don't know. */
- if (isatty (fileno (rl_instream)))
- chars_avail = _kbhit ();
- else
- chars_avail = 0;
- result = 0;
+ /* Use getch/_kbhit to check for available console input, in the same way
+ that we read it normally. */
+ chars_avail = isatty (tty) ? _kbhit () : 0;
+ result = 0;
#endif
/* If there's nothing available, don't waste time trying to read
{
while (chars_avail--)
{
+ RL_CHECK_SIGNALS ();
k = (*rl_getc_function) (rl_instream);
- rl_stuff_char (k);
+ if (rl_stuff_char (k) == 0)
+ break; /* some problem; no more room */
if (k == NEWLINE || k == RETURN)
break;
}
}
int
-rl_set_keyboard_input_timeout (u)
- int u;
+rl_set_keyboard_input_timeout (int u)
{
int o;
o = _keyboard_input_timeout;
- if (u > 0)
+ if (u >= 0)
_keyboard_input_timeout = u;
return (o);
}
the user, it should use _rl_input_queued(timeout_value_in_microseconds)
instead. */
int
-_rl_input_available ()
+_rl_input_available (void)
{
#if defined(HAVE_SELECT)
fd_set readfds, exceptfds;
#endif
int tty;
+ if (rl_input_available_hook)
+ return (*rl_input_available_hook) ();
+
tty = fileno (rl_instream);
#if defined (HAVE_SELECT)
#endif
#if defined (__MINGW32__)
- /* We use getch to read console input, so use the same
- mechanism to check for more. Otherwise, we don't know. */
- if (isatty (fileno (rl_instream)))
- return _kbhit ();
+ if (isatty (tty))
+ return (_kbhit ());
#endif
return 0;
}
int
-_rl_input_queued (t)
- int t;
+_rl_input_queued (int t)
{
int old_timeout, r;
}
void
-_rl_insert_typein (c)
- int c;
+_rl_insert_typein (int c)
{
int key, t, i;
char *string;
string[i] = '\0';
rl_insert_text (string);
- free (string);
+ xfree (string);
}
/* Add KEY to the buffer of characters to be read. Returns 1 if the
character was stuffed correctly; 0 otherwise. */
int
-rl_stuff_char (key)
- int key;
+rl_stuff_char (int key)
{
if (ibuffer_space () == 0)
return 0;
RL_SETSTATE (RL_STATE_INPUTPENDING);
}
ibuffer[push_index++] = key;
+#if 0
if (push_index >= ibuffer_len)
+#else
+ if (push_index > ibuffer_len)
+#endif
push_index = 0;
return 1;
/* Make C be the next command to be executed. */
int
-rl_execute_next (c)
- int c;
+rl_execute_next (int c)
{
rl_pending_input = c;
RL_SETSTATE (RL_STATE_INPUTPENDING);
/* Clear any pending input pushed with rl_execute_next() */
int
-rl_clear_pending_input ()
+rl_clear_pending_input (void)
{
rl_pending_input = 0;
RL_UNSETSTATE (RL_STATE_INPUTPENDING);
/* Read a key, including pending input. */
int
-rl_read_key ()
+rl_read_key (void)
{
- int c;
-
- rl_key_sequence_length++;
+ int c, r;
if (rl_pending_input)
{
- c = rl_pending_input;
+ c = rl_pending_input; /* XXX - cast to unsigned char if > 0? */
rl_clear_pending_input ();
}
else
{
/* If input is coming from a macro, then use that. */
if (c = _rl_next_macro_key ())
- return (c);
+ return ((unsigned char)c);
/* If the user has an event function, then call it periodically. */
if (rl_event_hook)
{
- while (rl_event_hook && rl_get_char (&c) == 0)
+ while (rl_event_hook)
{
- (*rl_event_hook) ();
- if (rl_done) /* XXX - experimental */
- return ('\n');
- if (rl_gather_tyi () < 0) /* XXX - EIO */
+ if (rl_get_char (&c) != 0)
+ break;
+
+ if ((r = rl_gather_tyi ()) < 0) /* XXX - EIO */
{
rl_done = 1;
- return ('\n');
+ return (errno == EIO ? (RL_ISSTATE (RL_STATE_READCMD) ? READERR : EOF) : '\n');
}
+ else if (r > 0) /* read something */
+ continue;
+
+ RL_CHECK_SIGNALS ();
+ if (rl_done) /* XXX - experimental */
+ return ('\n');
+ (*rl_event_hook) ();
}
}
else
{
if (rl_get_char (&c) == 0)
c = (*rl_getc_function) (rl_instream);
+/* fprintf(stderr, "rl_read_key: calling RL_CHECK_SIGNALS: _rl_caught_signal = %d", _rl_caught_signal); */
+ RL_CHECK_SIGNALS ();
}
}
}
int
-rl_getc (stream)
- FILE *stream;
+rl_getc (FILE *stream)
{
int result;
unsigned char c;
+#if defined (HAVE_PSELECT)
+ sigset_t empty_set;
+ fd_set readfds;
+#endif
while (1)
{
+ RL_CHECK_SIGNALS ();
+
+ /* We know at this point that _rl_caught_signal == 0 */
+
#if defined (__MINGW32__)
if (isatty (fileno (stream)))
- return (getch ());
+ return (_getch ()); /* "There is no error return." */
+#endif
+ result = 0;
+#if defined (HAVE_PSELECT)
+ FD_ZERO (&readfds);
+ FD_SET (fileno (stream), &readfds);
+# if defined (HANDLE_SIGNALS)
+ result = pselect (fileno (stream) + 1, &readfds, NULL, NULL, NULL, &_rl_orig_sigset);
+# else
+ sigemptyset (&empty_set);
+ sigprocmask (SIG_BLOCK, (sigset_t *)NULL, &empty_set);
+ result = pselect (fileno (stream) + 1, &readfds, NULL, NULL, NULL, &empty_set);
+# endif /* HANDLE_SIGNALS */
#endif
- result = read (fileno (stream), &c, sizeof (unsigned char));
+ if (result >= 0)
+ result = read (fileno (stream), &c, sizeof (unsigned char));
if (result == sizeof (unsigned char))
return (c);
#undef X_EWOULDBLOCK
#undef X_EAGAIN
- /* If the error that we received was SIGINT, then try again,
- this is simply an interrupted system call to read ().
- Otherwise, some error ocurred, also signifying EOF. */
+/* fprintf(stderr, "rl_getc: result = %d errno = %d\n", result, errno); */
+
+handle_error:
+ /* If the error that we received was EINTR, then try again,
+ this is simply an interrupted system call to read (). We allow
+ the read to be interrupted if we caught SIGHUP, SIGTERM, or any
+ of the other signals readline treats specially. If the
+ application sets an event hook, call it for other signals.
+ Otherwise (not EINTR), some error occurred, also signifying EOF. */
if (errno != EINTR)
- return (EOF);
+ return (RL_ISSTATE (RL_STATE_READCMD) ? READERR : EOF);
+ /* fatal signals of interest */
+#if defined (SIGHUP)
+ else if (_rl_caught_signal == SIGHUP || _rl_caught_signal == SIGTERM)
+#else
+ else if (_rl_caught_signal == SIGTERM)
+#endif
+ return (RL_ISSTATE (RL_STATE_READCMD) ? READERR : EOF);
+ /* keyboard-generated signals of interest */
+#if defined (SIGQUIT)
+ else if (_rl_caught_signal == SIGINT || _rl_caught_signal == SIGQUIT)
+#else
+ else if (_rl_caught_signal == SIGINT)
+#endif
+ RL_CHECK_SIGNALS ();
+ /* non-keyboard-generated signals of interest */
+#if defined (SIGWINCH)
+ else if (_rl_caught_signal == SIGWINCH)
+ RL_CHECK_SIGNALS ();
+#endif /* SIGWINCH */
+#if defined (SIGALRM)
+ else if (_rl_caught_signal == SIGALRM
+# if defined (SIGVTALRM)
+ || _rl_caught_signal == SIGVTALRM
+# endif
+ )
+ RL_CHECK_SIGNALS ();
+#endif /* SIGALRM */
+
+ if (rl_signal_event_hook)
+ (*rl_signal_event_hook) ();
}
}
#if defined (HANDLE_MULTIBYTE)
/* read multibyte char */
int
-_rl_read_mbchar (mbchar, size)
- char *mbchar;
- int size;
+_rl_read_mbchar (char *mbchar, int size)
{
- int mb_len = 0;
+ int mb_len, c;
size_t mbchar_bytes_length;
wchar_t wc;
mbstate_t ps, ps_back;
memset(&ps, 0, sizeof (mbstate_t));
memset(&ps_back, 0, sizeof (mbstate_t));
-
+
+ mb_len = 0;
while (mb_len < size)
{
RL_SETSTATE(RL_STATE_MOREINPUT);
- mbchar[mb_len++] = rl_read_key ();
+ c = rl_read_key ();
RL_UNSETSTATE(RL_STATE_MOREINPUT);
+ if (c < 0)
+ break;
+
+ mbchar[mb_len++] = c;
+
mbchar_bytes_length = mbrtowc (&wc, mbchar, mb_len, &ps);
if (mbchar_bytes_length == (size_t)(-1))
break; /* invalid byte sequence for the current locale */
}
/* Read a multibyte-character string whose first character is FIRST into
- the buffer MB of length MBLEN. Returns the last character read, which
+ the buffer MB of length MLEN. Returns the last character read, which
may be FIRST. Used by the search functions, among others. Very similar
to _rl_read_mbchar. */
int
-_rl_read_mbstring (first, mb, mblen)
- int first;
- char *mb;
- int mblen;
+_rl_read_mbstring (int first, char *mb, int mlen)
{
- int i, c;
+ int i, c, n;
mbstate_t ps;
c = first;
- memset (mb, 0, mblen);
- for (i = 0; i < mblen; i++)
+ memset (mb, 0, mlen);
+ for (i = 0; c >= 0 && i < mlen; i++)
{
mb[i] = (char)c;
memset (&ps, 0, sizeof (mbstate_t));
- if (_rl_get_char_len (mb, &ps) == -2)
+ n = _rl_get_char_len (mb, &ps);
+ if (n == -2)
{
/* Read more for multibyte character */
RL_SETSTATE (RL_STATE_MOREINPUT);
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