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Bash-4.4 distribution sources and documentation

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This commit is contained in:
Chet Ramey 2016-09-15 16:59:08 -04:00
commit a0c0a00fc4
588 changed files with 130746 additions and 80164 deletions
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51
builtins/read.def
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@ -1,7 +1,7 @@
This file is read.def, from which is created read.c.
It implements the builtin "read" in Bash.
Copyright (C) 1987-2012 Free Software Foundation, Inc.
Copyright (C) 1987-2015 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
@ -39,25 +39,27 @@ Options:
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
-i text Use TEXT as the initial text for Readline
-e use Readline to obtain the line in an interactive shell
-i text use TEXT as the initial text for Readline
-n nchars return after reading NCHARS characters rather than waiting
for a newline, but honor a delimiter if fewer than NCHARS
characters are read before the delimiter
for a newline, but honor a delimiter if fewer than
NCHARS characters are read before the delimiter
-N nchars return only after reading exactly NCHARS characters, unless
EOF is encountered or read times out, ignoring any delimiter
EOF is encountered or read times out, ignoring any
delimiter
-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 within TIMEOUT seconds. The value of the TMOUT
variable is the default timeout. TIMEOUT may be a
fractional number. If TIMEOUT is 0, read returns immediately,
without trying to read any data, returning success only if
input is available on the specified file descriptor. The
exit status is greater than 128 if the timeout is exceeded
-u fd read from file descriptor FD instead of the standard input
-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 within TIMEOUT seconds. The value of the
TMOUT variable is the default timeout. TIMEOUT may be a
fractional number. If TIMEOUT is 0, read returns
immediately, without trying to read any data, returning
success only if input is available on the specified
file descriptor. The exit status is greater than 128
if the timeout is exceeded
-u fd read from file descriptor FD instead of the standard input
Exit Status:
The return code is zero, unless end-of-file is encountered, read times out
@ -163,8 +165,9 @@ sigalrm (s)
static void
reset_alarm ()
{
set_signal_handler (SIGALRM, old_alrm);
/* Cancel alarm before restoring signal handler. */
falarm (0, 0);
set_signal_handler (SIGALRM, old_alrm);
}
/* Read the value of the shell variables whose names follow.
@ -314,6 +317,7 @@ read_builtin (list)
case 'd':
delim = *list_optarg;
break;
CASE_HELPOPT;
default:
builtin_usage ();
return (EX_USAGE);
@ -333,7 +337,7 @@ read_builtin (list)
/* Convenience: check early whether or not the first of possibly several
variable names is a valid identifier, and bail early if so. */
#if defined (ARRAY_VARS)
if (list && legal_identifier (list->word->word) == 0 && valid_array_reference (list->word->word) == 0)
if (list && legal_identifier (list->word->word) == 0 && valid_array_reference (list->word->word, 0) == 0)
#else
if (list && legal_identifier (list->word->word) == 0)
#endif
@ -793,7 +797,10 @@ assign_vars:
}
else
var = bind_variable ("REPLY", input_string, 0);
VUNSETATTR (var, att_invisible);
if (var == 0 || readonly_p (var) || noassign_p (var))
retval = EXECUTION_FAILURE;
else
VUNSETATTR (var, att_invisible);
xfree (input_string);
return (retval);
@ -812,7 +819,7 @@ assign_vars:
{
varname = list->word->word;
#if defined (ARRAY_VARS)
if (legal_identifier (varname) == 0 && valid_array_reference (varname) == 0)
if (legal_identifier (varname) == 0 && valid_array_reference (varname, 0) == 0)
#else
if (legal_identifier (varname) == 0)
#endif
@ -860,7 +867,7 @@ assign_vars:
/* Now assign the rest of the line to the last variable argument. */
#if defined (ARRAY_VARS)
if (legal_identifier (list->word->word) == 0 && valid_array_reference (list->word->word) == 0)
if (legal_identifier (list->word->word) == 0 && valid_array_reference (list->word->word, 0) == 0)
#else
if (legal_identifier (list->word->word) == 0)
#endif
@ -923,7 +930,7 @@ bind_read_variable (name, value)
SHELL_VAR *v;
#if defined (ARRAY_VARS)
if (valid_array_reference (name) == 0)
if (valid_array_reference (name, 0) == 0)
v = bind_variable (name, value, 0);
else
v = assign_array_element (name, value, 0);