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bash/ddd1
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Chet Ramey 29d25b5400 commit bash-20080306 snapshot
2011-12-07 09:19:53 -05:00

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*** ../bash-3.2-patched/builtins/read.def 2007-08-25 13:47:07.000000000 -0400
--- builtins/read.def 2008-02-09 16:34:39.000000000 -0500
***************
*** 1,7 ****
This file is read.def, from which is created read.c.
It implements the builtin "read" in Bash.
! Copyright (C) 1987-2005 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
--- 1,7 ----
This file is read.def, from which is created read.c.
It implements the builtin "read" in Bash.
! Copyright (C) 1987-2008 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
***************
*** 23,50 ****
$BUILTIN read
$FUNCTION read_builtin
! $SHORT_DOC read [-ers] [-u fd] [-t timeout] [-p prompt] [-a array] [-n nchars] [-d delim] [name ...]
! One line is read from the standard input, or from file descriptor FD if the
! -u option is supplied, and the first word is assigned to the first NAME,
! the second word to the second NAME, and so on, with leftover words assigned
! to the last NAME. Only the characters found in $IFS are recognized as word
! delimiters. If no NAMEs are supplied, the line read is stored in the REPLY
! variable. If the -r option is given, this signifies `raw' input, and
! backslash escaping is disabled. The -d option causes read to continue
! until the first character of DELIM is read, rather than newline. If the -p
! option is supplied, the string PROMPT is output without a trailing newline
! before attempting to read. If -a is supplied, the words read are assigned
! to sequential indices of ARRAY, starting at zero. If -e is supplied and
! the shell is interactive, readline is used to obtain the line. If -n is
! supplied with a non-zero NCHARS argument, read returns after NCHARS
! characters have been read. The -s option causes input coming from a
! terminal to not be echoed.
!
! The -t option causes read to time out and return failure if a complete line
! of input is not read within TIMEOUT seconds. If the TMOUT variable is set,
! its value is the default timeout. The return code is zero, unless end-of-file
! is encountered, read times out, or an invalid file descriptor is supplied as
! the argument to -u.
$END
#include <config.h>
--- 23,57 ----
$BUILTIN read
$FUNCTION read_builtin
! $SHORT_DOC read [-ers] [-a array] [-d delim] [-n nchars] [-p prompt] [-t timeout] [-u fd] [name ...]
! Reads a single line from the standard input, or from file descriptor FD
! if the -u option is supplied. The line is split into fields as with word
! splitting, and the first word is assigned to the first NAME, the second
! word to the second NAME, and so on, with any leftover words assigned to
! the last NAME. Only the characters found in $IFS are recognized as word
! delimiters.
!
! If no NAMEs are supplied, the line read is stored in the REPLY variable.
!
! Options:
! -a array assign the words read to sequential indices of the array
! variable ARRAY, starting at zero
! -d delim continue until the first character of DELIM is read, rather
! than newline
! -e use Readline to obtain the line in an interactive shell
! -n nchars return after reading NCHARS characters rather than waiting
! for a newline
! -p prompt output the string PROMPT without a trailing newline before
! attempting to read
! -r do not allow backslashes to escape any characters
! -s do not echo input coming from a terminal
! -t timeout time out and return failure if a complete line of input is
! not read withint TIMEOUT seconds. The value of the TMOUT
! variable is the default timeout.
! -u fd read from file descriptor FD instead of the standard input
!
! The return code is zero, unless end-of-file is encountered, read times out,
! or an invalid file descriptor is supplied as the argument to -u.
$END
#include <config.h>
***************
*** 87,92 ****
--- 94,105 ----
extern int errno;
#endif
+ struct ttsave
+ {
+ int fd;
+ TTYSTRUCT *attrs;
+ };
+
#if defined (READLINE)
static void reset_attempted_completion_function __P((char *));
static char *edit_line __P((char *));
***************
*** 94,99 ****
--- 107,116 ----
static void reset_eol_delim __P((char *));
#endif
static SHELL_VAR *bind_read_variable __P((char *, char *));
+ #if defined (HANDLE_MULTIBYTE)
+ static int read_mbchar __P((int, char *, int, int, int));
+ #endif
+ static void ttyrestore __P((struct ttsave *));
static sighandler sigalrm __P((int));
static void reset_alarm __P((void));
***************
*** 134,142 ****
intmax_t intval;
char c;
char *input_string, *orig_input_string, *ifs_chars, *prompt, *arrayname;
! char *e, *t, *t1, *ps2;
struct stat tsb;
SHELL_VAR *var;
#if defined (ARRAY_VARS)
WORD_LIST *alist;
#endif
--- 151,161 ----
intmax_t intval;
char c;
char *input_string, *orig_input_string, *ifs_chars, *prompt, *arrayname;
! char *e, *t, *t1, *ps2, *tofree;
struct stat tsb;
SHELL_VAR *var;
+ TTYSTRUCT ttattrs, ttset;
+ struct ttsave termsave;
#if defined (ARRAY_VARS)
WORD_LIST *alist;
#endif
***************
*** 263,268 ****
--- 282,289 ----
ifs_chars = getifs ();
if (ifs_chars == 0) /* XXX - shouldn't happen */
ifs_chars = "";
+ for (skip_ctlesc = skip_ctlnul = 0, e = ifs_chars; *e; e++)
+ skip_ctlesc |= *e == CTLESC, skip_ctlnul |= *e == CTLNUL;
input_string = (char *)xmalloc (size = 112); /* XXX was 128 */
***************
*** 326,333 ****
--- 347,359 ----
code = setjmp (alrmbuf);
if (code)
{
+ #if 0
run_unwind_frame ("read_builtin");
return (EXECUTION_FAILURE);
+ #else
+ retval = EXECUTION_FAILURE;
+ goto assign_vars;
+ #endif
}
old_alrm = set_signal_handler (SIGALRM, sigalrm);
add_unwind_protect (reset_alarm, (char *)NULL);
***************
*** 361,379 ****
#endif
if (input_is_tty)
{
! ttsave ();
if (silent)
! ttcbreak ();
else
! ttonechar ();
! add_unwind_protect ((Function *)ttrestore, (char *)NULL);
}
}
else if (silent) /* turn off echo but leave term in canonical mode */
{
! ttsave ();
! ttnoecho ();
! add_unwind_protect ((Function *)ttrestore, (char *)NULL);
}
/* This *must* be the top unwind-protect on the stack, so the manipulation
--- 387,416 ----
#endif
if (input_is_tty)
{
! /* ttsave() */
! termsave.fd = fd;
! ttgetattr (fd, &ttattrs);
! termsave.attrs = &ttattrs;
!
! ttset = ttattrs;
if (silent)
! ttfd_cbreak (fd, &ttset); /* ttcbreak () */
else
! ttfd_onechar (fd, &ttset); /* ttonechar () */
! add_unwind_protect ((Function *)ttyrestore, (char *)&termsave);
}
}
else if (silent) /* turn off echo but leave term in canonical mode */
{
! /* ttsave (); */
! termsave.fd = fd;
! ttgetattr (fd, &ttattrs);
! termsave.attrs = &ttattrs;
!
! ttset = ttattrs;
! ttfd_noecho (fd, &ttset); /* ttnoecho (); */
!
! add_unwind_protect ((Function *)ttyrestore, (char *)&termsave);
}
/* This *must* be the top unwind-protect on the stack, so the manipulation
***************
*** 439,445 ****
}
#endif
! if (i + 2 >= size)
{
input_string = (char *)xrealloc (input_string, size += 128);
remove_unwind_protect ();
--- 476,482 ----
}
#endif
! if (i + 4 >= size) /* XXX was i + 2; use i + 4 for multibyte/read_mbchar */
{
input_string = (char *)xrealloc (input_string, size += 128);
remove_unwind_protect ();
***************
*** 462,479 ****
continue;
}
if (c == '\\' && raw == 0)
{
pass_next++;
! saw_escape++;
! input_string[i++] = CTLESC;
continue;
}
if ((unsigned char)c == delim)
break;
! if (c == CTLESC || c == CTLNUL)
{
saw_escape++;
input_string[i++] = CTLESC;
--- 499,520 ----
continue;
}
+ /* This may cause problems if IFS contains CTLESC */
if (c == '\\' && raw == 0)
{
pass_next++;
! if (skip_ctlesc == 0)
! {
! saw_escape++;
! input_string[i++] = CTLESC;
! }
continue;
}
if ((unsigned char)c == delim)
break;
! if ((skip_ctlesc == 0 && c == CTLESC) || (skip_ctlnul == 0 && c == CTLNUL))
{
saw_escape++;
input_string[i++] = CTLESC;
***************
*** 481,486 ****
--- 522,536 ----
add_char:
input_string[i++] = c;
+
+ #if defined (HANDLE_MULTIBYTE)
+ if (nchars > 0 && MB_CUR_MAX > 1)
+ {
+ input_string[i] = '\0'; /* for simplicity and debugging */
+ i += read_mbchar (fd, input_string, i, c, unbuffered_read);
+ }
+ #endif
+
nr++;
if (nchars > 0 && nr >= nchars)
***************
*** 513,522 ****
else
#endif
if (input_is_tty)
! ttrestore ();
}
else if (silent)
! ttrestore ();
if (unbuffered_read == 0)
zsyncfd (fd);
--- 563,572 ----
else
#endif
if (input_is_tty)
! ttyrestore (&termsave);
}
else if (silent)
! ttyrestore (&termsave);
if (unbuffered_read == 0)
zsyncfd (fd);
***************
*** 527,532 ****
--- 577,584 ----
retval = eof ? EXECUTION_FAILURE : EXECUTION_SUCCESS;
+ assign_vars:
+
#if defined (ARRAY_VARS)
/* If -a was given, take the string read, break it into a list of words,
an assign them to `arrayname' in turn. */
***************
*** 603,609 ****
for (t = input_string; ifs_chars && *ifs_chars && spctabnl(*t) && isifs(*t); t++)
;
input_string = t;
-
for (; list->next; list = list->next)
{
varname = list->word->word;
--- 655,660 ----
***************
*** 674,685 ****
#else
/* Check whether or not the number of fields is exactly the same as the
number of variables. */
if (*input_string)
{
t1 = input_string;
t = get_word_from_string (&input_string, ifs_chars, &e);
if (*input_string == 0)
! input_string = t;
else
input_string = strip_trailing_ifs_whitespace (t1, ifs_chars, saw_escape);
}
--- 725,737 ----
#else
/* Check whether or not the number of fields is exactly the same as the
number of variables. */
+ tofree = NULL;
if (*input_string)
{
t1 = input_string;
t = get_word_from_string (&input_string, ifs_chars, &e);
if (*input_string == 0)
! tofree = input_string = t;
else
input_string = strip_trailing_ifs_whitespace (t1, ifs_chars, saw_escape);
}
***************
*** 694,699 ****
--- 746,753 ----
else
var = bind_read_variable (list->word->word, input_string);
stupidly_hack_special_variables (list->word->word);
+ FREE (tofree);
+
if (var)
VUNSETATTR (var, att_invisible);
xfree (orig_input_string);
***************
*** 715,720 ****
--- 769,830 ----
#endif /* !ARRAY_VARS */
}
+ #if defined (HANDLE_MULTIBYTE)
+ static int
+ read_mbchar (fd, string, ind, ch, unbuffered)
+ int fd;
+ char *string;
+ int ind, ch, unbuffered;
+ {
+ char mbchar[MB_LEN_MAX + 1];
+ int i, n, r;
+ char c;
+ size_t ret;
+ mbstate_t ps, ps_back;
+ wchar_t wc;
+
+ memset (&ps, '\0', sizeof (mbstate_t));
+ memset (&ps_back, '\0', sizeof (mbstate_t));
+
+ mbchar[0] = ch;
+ i = 1;
+ for (n = 0; n <= MB_LEN_MAX; n++)
+ {
+ ps_back = ps;
+ ret = mbrtowc (&wc, mbchar, i, &ps);
+ if (ret == (size_t)-2)
+ {
+ ps = ps_back;
+ if (unbuffered)
+ r = zread (fd, &c, 1);
+ else
+ r = zreadc (fd, &c);
+ if (r < 0)
+ goto mbchar_return;
+ mbchar[i++] = c;
+ continue;
+ }
+ else if (ret == (size_t)-1 || ret == (size_t)0 || ret > (size_t)0)
+ break;
+ }
+
+ mbchar_return:
+ if (i > 1) /* read a multibyte char */
+ /* mbchar[0] is already string[ind-1] */
+ for (r = 1; r < i; r++)
+ string[ind+r-1] = mbchar[r];
+ return i - 1;
+ }
+ #endif
+
+
+ static void
+ ttyrestore (ttp)
+ struct ttsave *ttp;
+ {
+ ttsetattr (ttp->fd, ttp->attrs);
+ }
+
#if defined (READLINE)
static rl_completion_func_t *old_attempted_completion_function = 0;
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