diff options
Diffstat (limited to 'input.c')
| -rw-r--r-- | input.c | 53 |
1 files changed, 39 insertions, 14 deletions
@@ -1,6 +1,6 @@ /* input.c -- character input functions for readline. */ -/* Copyright (C) 1994-2010 Free Software Foundation, Inc. +/* Copyright (C) 1994-2013 Free Software Foundation, Inc. This file is part of the GNU Readline Library (Readline), a library for reading lines of text with interactive input and history editing. @@ -45,6 +45,8 @@ # include "ansi_stdlib.h" #endif /* HAVE_STDLIB_H */ +#include <signal.h> + #include "posixselect.h" #if defined (FIONREAD_IN_SYS_IOCTL) @@ -78,6 +80,13 @@ extern int errno; 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 */ @@ -104,6 +113,12 @@ _rl_any_typein () return any_typein; } +int +_rl_pushed_input_available () +{ + return (push_index != pop_index); +} + /* Return the amount of space available in the buffer for stuffing characters. */ static int @@ -117,7 +132,7 @@ ibuffer_space () /* 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; @@ -154,12 +169,6 @@ _rl_unget_char (key) 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). */ @@ -291,6 +300,9 @@ _rl_input_available () #endif int tty; + if (rl_input_available_hook) + return (*rl_input_available_hook) (); + tty = fileno (rl_instream); #if defined (HAVE_SELECT) @@ -411,8 +423,6 @@ rl_read_key () { int c, r; - rl_key_sequence_length++; - if (rl_pending_input) { c = rl_pending_input; @@ -437,7 +447,7 @@ rl_read_key () rl_done = 1; return ('\n'); } - else if (r == 1) /* read something */ + else if (r > 0) /* read something */ continue; RL_CHECK_SIGNALS (); @@ -450,6 +460,7 @@ rl_read_key () { 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 (); } } @@ -468,6 +479,8 @@ rl_getc (stream) { RL_CHECK_SIGNALS (); + /* We know at this point that _rl_caught_signal == 0 */ + #if defined (__MINGW32__) if (isatty (fileno (stream))) return (getch ()); @@ -509,11 +522,23 @@ rl_getc (stream) #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); */ + + /* 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 or SIGTERM (but + not SIGINT; let the signal handler deal with that), but 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 (RL_ISSTATE (RL_STATE_READCMD) ? READERR : EOF); + else if (_rl_caught_signal == SIGHUP || _rl_caught_signal == SIGTERM) + return (RL_ISSTATE (RL_STATE_READCMD) ? READERR : EOF); + else if (_rl_caught_signal == SIGINT || _rl_caught_signal == SIGQUIT) + RL_CHECK_SIGNALS (); + + if (rl_signal_event_hook) + (*rl_signal_event_hook) (); } } |