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bash-5.0 distribution sources and documentation

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This commit is contained in:
Chet Ramey
2019-01-07 09:27:52 -05:00
parent 6444760999
commit d233b485e8
528 changed files with 84836 additions and 67099 deletions
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120
shell.c
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@@ -1,6 +1,6 @@
/* shell.c -- GNU's idea of the POSIX shell specification. */
/* Copyright (C) 1987-2015 Free Software Foundation, Inc.
/* Copyright (C) 1987-2017 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
@@ -51,6 +51,7 @@
#define NEED_SH_SETLINEBUF_DECL /* used in externs.h */
#include "shell.h"
#include "parser.h"
#include "flags.h"
#include "trap.h"
#include "mailcheck.h"
@@ -60,6 +61,7 @@
#if defined (JOB_CONTROL)
#include "jobs.h"
#else
extern int running_in_background;
extern int initialize_job_control __P((int));
extern int get_tty_state __P((void));
#endif /* JOB_CONTROL */
@@ -101,22 +103,12 @@ extern int errno;
extern char **environ; /* used if no third argument to main() */
#endif
extern char *dist_version, *release_status;
extern int patch_level, build_version;
extern int shell_level;
extern int subshell_environment;
extern int running_in_background;
extern int last_command_exit_value;
extern int line_number;
extern int expand_aliases;
extern int array_needs_making;
extern int gnu_error_format;
extern char *primary_prompt, *secondary_prompt;
extern char *this_command_name;
/* Non-zero means that this shell has already been run; i.e. you should
call shell_reinitialize () if you need to start afresh. */
int shell_initialized = 0;
int bash_argv_initialized = 0;
COMMAND *global_command = (COMMAND *)NULL;
@@ -232,6 +224,8 @@ int dump_po_strings; /* Dump strings in $"..." in po format */
int wordexp_only = 0; /* Do word expansion only */
int protected_mode = 0; /* No command substitution with --wordexp */
int pretty_print_mode = 0; /* pretty-print a shell script */
#if defined (STRICT_POSIX)
int posixly_correct = 1; /* Non-zero means posix.2 superset. */
#else
@@ -260,6 +254,7 @@ static const struct {
{ "noprofile", Int, &no_profile, (char **)0x0 },
{ "norc", Int, &no_rc, (char **)0x0 },
{ "posix", Int, &posixly_correct, (char **)0x0 },
{ "pretty-print", Int, &pretty_print_mode, (char **)0x0 },
#if defined (WORDEXP_OPTION)
{ "protected", Int, &protected_mode, (char **)0x0 },
#endif
@@ -297,6 +292,7 @@ int want_pending_command; /* -c flag supplied */
/* This variable is not static so it can be bound to $BASH_EXECUTION_STRING */
char *command_execution_string; /* argument to -c option */
char *shell_script_filename; /* shell script */
int malloc_trace_at_exit = 0;
@@ -433,7 +429,7 @@ main (argc, argv, env)
arg_index = 1;
if (arg_index > argc)
arg_index = argc;
command_execution_string = (char *)NULL;
command_execution_string = shell_script_filename = (char *)NULL;
want_pending_command = locally_skip_execution = read_from_stdin = 0;
default_input = stdin;
#if defined (BUFFERED_INPUT)
@@ -584,7 +580,7 @@ main (argc, argv, env)
*/
if (interactive_shell)
{
char *term, *emacs, *inside_emacs;;
char *term, *emacs, *inside_emacs;
int emacs_term, in_emacs;
term = get_string_value ("TERM");
@@ -673,6 +669,22 @@ main (argc, argv, env)
restricted = 0;
#endif
/* Set positional parameters before running startup files. top_level_arg_index
holds the index of the current argument before setting the positional
parameters, so any changes performed in the startup files won't affect
later option processing. */
if (wordexp_only)
; /* nothing yet */
else if (command_execution_string)
arg_index = bind_args (argv, arg_index, argc, 0); /* $0 ... $n */
else if (arg_index != argc && read_from_stdin == 0)
{
shell_script_filename = argv[arg_index++];
arg_index = bind_args (argv, arg_index, argc, 1); /* $1 ... $n */
}
else
arg_index = bind_args (argv, arg_index, argc, 1); /* $1 ... $n */
/* The startup files are run with `set -e' temporarily disabled. */
if (locally_skip_execution == 0 && running_setuid == 0)
{
@@ -703,7 +715,7 @@ main (argc, argv, env)
if (wordexp_only)
{
startup_state = 3;
last_command_exit_value = run_wordexp (argv[arg_index]);
last_command_exit_value = run_wordexp (argv[top_level_arg_index]);
exit_shell (last_command_exit_value);
}
#endif
@@ -713,7 +725,6 @@ main (argc, argv, env)
if (command_execution_string)
{
arg_index = bind_args (argv, arg_index, argc, 0);
startup_state = 2;
if (debugging_mode)
@@ -731,11 +742,8 @@ main (argc, argv, env)
/* Get possible input filename and set up default_buffered_input or
default_input as appropriate. */
if (arg_index != argc && read_from_stdin == 0)
{
open_shell_script (argv[arg_index]);
arg_index++;
}
if (shell_script_filename)
open_shell_script (shell_script_filename);
else if (interactive == 0)
{
/* In this mode, bash is reading a script from stdin, which is a
@@ -747,16 +755,13 @@ main (argc, argv, env)
#endif /* !BUFFERED_INPUT */
read_from_stdin = 1;
}
else if (arg_index == argc)
else if (top_level_arg_index == argc) /* arg index before startup files */
/* "If there are no operands and the -c option is not specified, the -s
option shall be assumed." */
read_from_stdin = 1;
set_bash_input ();
/* Bind remaining args to $1 ... $n */
arg_index = bind_args (argv, arg_index, argc, 1);
if (debugging_mode && locally_skip_execution == 0 && running_setuid == 0 && (reading_shell_script || interactive_shell == 0))
start_debugger ();
@@ -788,6 +793,14 @@ main (argc, argv, env)
shell_initialized = 1;
if (pretty_print_mode && interactive_shell)
{
internal_warning (_("pretty-printing mode ignored in interactive shells"));
pretty_print_mode = 0;
}
if (pretty_print_mode)
exit_shell (pretty_print_loop ());
/* Read commands until exit condition. */
reader_loop ();
exit_shell (last_command_exit_value);
@@ -999,7 +1012,7 @@ sh_exit (s)
int s;
{
#if defined (MALLOC_DEBUG) && defined (USING_BASH_MALLOC)
if (malloc_trace_at_exit)
if (malloc_trace_at_exit && (subshell_environment & (SUBSHELL_COMSUB|SUBSHELL_PROCSUB)) == 0)
trace_malloc_stats (get_name_for_error (), (char *)NULL);
/* mlocation_write_table (); */
#endif
@@ -1236,6 +1249,10 @@ maybe_make_restricted (name)
temp++;
if (restricted || (STREQ (temp, RESTRICTED_SHELL_NAME)))
{
#if defined (RBASH_STATIC_PATH_VALUE)
bind_variable ("PATH", RBASH_STATIC_PATH_VALUE, 0);
stupidly_hack_special_variables ("PATH"); /* clear hash table */
#endif
set_var_read_only ("PATH");
set_var_read_only ("SHELL");
set_var_read_only ("ENV");
@@ -1406,13 +1423,21 @@ bind_args (argv, arg_start, arg_end, start_index)
int arg_start, arg_end, start_index;
{
register int i;
WORD_LIST *args;
WORD_LIST *args, *tl;
for (i = arg_start, args = tl = (WORD_LIST *)NULL; i < arg_end; i++)
{
if (args == 0)
args = tl = make_word_list (make_word (argv[i]), args);
else
{
tl->next = make_word_list (make_word (argv[i]), (WORD_LIST *)NULL);
tl = tl->next;
}
}
for (i = arg_start, args = (WORD_LIST *)NULL; i < arg_end; i++)
args = make_word_list (make_word (argv[i]), args);
if (args)
{
args = REVERSE_LIST (args, WORD_LIST *);
if (start_index == 0) /* bind to $0...$n for sh -c command */
{
/* Posix.2 4.56.3 says that the first argument after sh -c command
@@ -1421,12 +1446,23 @@ bind_args (argv, arg_start, arg_end, start_index)
FREE (dollar_vars[0]);
dollar_vars[0] = savestring (args->word->word);
remember_args (args->next, 1);
push_args (args->next); /* BASH_ARGV and BASH_ARGC */
if (debugging_mode)
{
push_args (args->next); /* BASH_ARGV and BASH_ARGC */
bash_argv_initialized = 1;
}
}
else /* bind to $1...$n for shell script */
{
remember_args (args, 1);
push_args (args); /* BASH_ARGV and BASH_ARGC */
/* We do this unconditionally so something like -O extdebug doesn't
do it first. We're setting the definitive positional params
here. */
if (debugging_mode)
{
push_args (args); /* BASH_ARGV and BASH_ARGC */
bash_argv_initialized = 1;
}
}
dispose_words (args);
@@ -1504,6 +1540,9 @@ open_shell_script (script_name)
{
e = errno;
file_error (filename);
#if defined (JOB_CONTROL)
end_job_control (); /* just in case we were run as bash -i script */
#endif
sh_exit ((e == ENOENT) ? EX_NOTFOUND : EX_NOINPUT);
}
@@ -1523,6 +1562,9 @@ open_shell_script (script_name)
errno = EINVAL;
#endif
file_error (filename);
#if defined (JOB_CONTROL)
end_job_control (); /* just in case we were run as bash -i script */
#endif
sh_exit (EX_NOINPUT);
}
@@ -1571,11 +1613,17 @@ open_shell_script (script_name)
errno = e;
file_error (filename);
}
#if defined (JOB_CONTROL)
end_job_control (); /* just in case we were run as bash -i script */
#endif
exit (EX_NOEXEC);
}
else if (sample_len > 0 && (check_binary_file (sample, sample_len)))
{
internal_error (_("%s: cannot execute binary file"), filename);
#if defined (JOB_CONTROL)
end_job_control (); /* just in case we were run as bash -i script */
#endif
exit (EX_BINARY_FILE);
}
/* Now rewind the file back to the beginning. */
@@ -1722,6 +1770,7 @@ init_interactive ()
interactive = 1;
#if defined (HISTORY)
remember_on_history = enable_history_list = 1; /* XXX */
histexp_flag = history_expansion; /* XXX */
#endif
}
@@ -1889,6 +1938,7 @@ shell_reinitialize ()
forced_interactive = interactive_shell = 0;
subshell_environment = running_in_background = 0;
expand_aliases = 0;
bash_argv_initialized = 0;
/* XXX - should we set jobs_m_flag to 0 here? */
@@ -1939,7 +1989,11 @@ show_shell_usage (fp, extra)
for (i = 0, set_opts = 0; shell_builtins[i].name; i++)
if (STREQ (shell_builtins[i].name, "set"))
set_opts = savestring (shell_builtins[i].short_doc);
{
set_opts = savestring (shell_builtins[i].short_doc);
break;
}
if (set_opts)
{
s = strchr (set_opts, '[');