This file is set.def, from which is created set.c.
It implements the "set" and "unset" builtins in Bash.
-Copyright (C) 1987, 1989, 1991 Free Software Foundation, Inc.
+Copyright (C) 1987-2004 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
Bash 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 1, or (at your option) any later
+Software Foundation; either version 2, or (at your option) any later
version.
Bash is distributed in the hope that it will be useful, but WITHOUT ANY
You should have received a copy of the GNU General Public License along
with Bash; see the file COPYING. If not, write to the Free Software
-Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA.
$PRODUCES set.c
#include <stdio.h>
#include "../bashansi.h"
+#include "../bashintl.h"
#include "../shell.h"
#include "../flags.h"
# include "../bashhist.h"
#endif
-extern int interactive;
-extern int noclobber, posixly_correct, ignoreeof, eof_encountered_limit;
+extern int posixly_correct, ignoreeof, eof_encountered_limit;
+#if defined (HISTORY)
+extern int dont_save_function_defs;
+#endif
#if defined (READLINE)
-extern int rl_editing_mode, no_line_editing;
+extern int no_line_editing;
#endif /* READLINE */
$BUILTIN set
-e Exit immediately if a command exits with a non-zero status.
-f Disable file name generation (globbing).
-h Remember the location of commands as they are looked up.
- -i Force the shell to be an "interactive" one. Interactive shells
- always read `~/.bashrc' on startup.
-k All assignment arguments are placed in the environment for a
command, not just those that precede the command name.
-m Job control is enabled.
emacs use an emacs-style line editing interface
#endif /* READLINE */
errexit same as -e
+ errtrace same as -E
+ functrace same as -T
hashall same as -h
#if defined (BANG_HISTORY)
histexpand same as -H
noclobber same as -C
noexec same as -n
noglob same as -f
+ nolog currently accepted but ignored
notify same as -b
nounset same as -u
onecmd same as -t
physical same as -P
+ pipefail the return value of a pipeline is the status of
+ the last command to exit with a non-zero status,
+ or zero if no command exited with a non-zero status
posix change the behavior of bash where the default
operation differs from the 1003.2 standard to
match the standard
#endif /* BRACE_EXPANSION */
-C If set, disallow existing regular files to be overwritten
by redirection of output.
+ -E If set, the ERR trap is inherited by shell functions.
#if defined (BANG_HISTORY)
-H Enable ! style history substitution. This flag is on
- by default.
+ by default when the shell is interactive.
#endif /* BANG_HISTORY */
-P If set, do not follow symbolic links when executing commands
such as cd which change the current directory.
+ -T If set, the DEBUG trap is inherited by shell functions.
+ - Assign any remaining arguments to the positional parameters.
+ The -x and -v options are turned off.
Using + rather than - causes these flags to be turned off. The
flags can also be used upon invocation of the shell. The current
ARGs are given, all shell variables are printed.
$END
-static int set_ignoreeof ();
-static int set_posix_mode ();
+typedef int setopt_set_func_t __P((int, char *));
+typedef int setopt_get_func_t __P((char *));
+
+static void print_minus_o_option __P((char *, int, int));
+static void print_all_shell_variables __P((void));
+
+static int set_ignoreeof __P((int, char *));
+static int set_posix_mode __P((int, char *));
#if defined (READLINE)
-static int set_edit_mode ();
-static int get_edit_mode ();
+static int set_edit_mode __P((int, char *));
+static int get_edit_mode __P((char *));
#endif
#if defined (HISTORY)
-static int bash_set_history ();
+static int bash_set_history __P((int, char *));
#endif
static char *on = "on";
static char *off = "off";
-/* An a-list used to match long options for set -o to the corresponding
- option letter. */
+/* A struct used to match long options for set -o to the corresponding
+ option letter or internal variable. The functions can be called to
+ dynamically generate values. */
struct {
char *name;
int letter;
+ int *variable;
+ setopt_set_func_t *set_func;
+ setopt_get_func_t *get_func;
} o_options[] = {
- { "allexport", 'a' },
+ { "allexport", 'a', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
#if defined (BRACE_EXPANSION)
- { "braceexpand",'B' },
+ { "braceexpand",'B', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
+#endif
+#if defined (READLINE)
+ { "emacs", '\0', (int *)NULL, set_edit_mode, get_edit_mode },
#endif
- { "errexit", 'e' },
- { "hashall", 'h' },
+ { "errexit", 'e', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
+ { "errtrace", 'E', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
+ { "functrace", 'T', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
+ { "hashall", 'h', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
#if defined (BANG_HISTORY)
- { "histexpand", 'H' },
+ { "histexpand", 'H', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
#endif /* BANG_HISTORY */
- { "keyword", 'k' },
- { "monitor", 'm' },
- { "noclobber", 'C' },
- { "noexec", 'n' },
- { "noglob", 'f' },
-#if defined (JOB_CONTROL)
- { "notify", 'b' },
-#endif /* JOB_CONTROL */
- { "nounset", 'u' },
- { "onecmd", 't' },
- { "physical", 'P' },
- { "privileged", 'p' },
- { "verbose", 'v' },
- { "xtrace", 'x' },
- {(char *)NULL, 0 },
-};
-
-struct {
- char *name;
- int *variable;
- Function *set_func;
- Function *get_func;
-} binary_o_options[] = {
#if defined (HISTORY)
- { "history", &remember_on_history, bash_set_history, (Function *)NULL },
+ { "history", '\0', &remember_on_history, bash_set_history, (setopt_get_func_t *)NULL },
+#endif
+ { "ignoreeof", '\0', &ignoreeof, set_ignoreeof, (setopt_get_func_t *)NULL },
+ { "interactive-comments", '\0', &interactive_comments, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
+ { "keyword", 'k', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
+ { "monitor", 'm', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
+ { "noclobber", 'C', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
+ { "noexec", 'n', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
+ { "noglob", 'f', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
+#if defined (HISTORY)
+ { "nolog", '\0', &dont_save_function_defs, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
#endif
- { "ignoreeof", &ignoreeof, set_ignoreeof, (Function *)NULL },
- { "interactive-comments", &interactive_comments, (Function *)NULL, (Function *)NULL },
- { "posix", &posixly_correct, set_posix_mode, (Function *)NULL },
+#if defined (JOB_CONTROL)
+ { "notify", 'b', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
+#endif /* JOB_CONTROL */
+ { "nounset", 'u', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
+ { "onecmd", 't', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
+ { "physical", 'P', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
+ { "pipefail", '\0', &pipefail_opt, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
+ { "posix", '\0', &posixly_correct, set_posix_mode, (setopt_get_func_t *)NULL },
+ { "privileged", 'p', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
+ { "verbose", 'v', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
#if defined (READLINE)
- { "emacs", (int *)NULL, set_edit_mode, get_edit_mode },
- { "vi", (int *)NULL, set_edit_mode, get_edit_mode },
+ { "vi", '\0', (int *)NULL, set_edit_mode, get_edit_mode },
#endif
- { (char *)NULL, (int *)NULL }
+ { "xtrace", 'x', (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
+ {(char *)NULL, 0 , (int *)NULL, (setopt_set_func_t *)NULL, (setopt_get_func_t *)NULL },
};
+#define N_O_OPTIONS (sizeof (o_options) / sizeof (o_options[0]))
+
#define GET_BINARY_O_OPTION_VALUE(i, name) \
- ((binary_o_options[i].get_func) ? (*binary_o_options[i].get_func) (name) \
- : (*binary_o_options[i].variable))
+ ((o_options[i].get_func) ? (*o_options[i].get_func) (name) \
+ : (*o_options[i].variable))
#define SET_BINARY_O_OPTION_VALUE(i, onoff, name) \
- ((binary_o_options[i].set_func) ? (*binary_o_options[i].set_func) (onoff, name) \
- : (*binary_o_options[i].variable = (onoff == FLAG_ON)))
+ ((o_options[i].set_func) ? (*o_options[i].set_func) (onoff, name) \
+ : (*o_options[i].variable = (onoff == FLAG_ON)))
int
minus_o_option_value (name)
{
if (STREQ (name, o_options[i].name))
{
- on_or_off = find_flag (o_options[i].letter);
- return ((on_or_off == FLAG_UNKNOWN) ? -1 : *on_or_off);
+ if (o_options[i].letter)
+ {
+ on_or_off = find_flag (o_options[i].letter);
+ return ((on_or_off == FLAG_UNKNOWN) ? -1 : *on_or_off);
+ }
+ else
+ return (GET_BINARY_O_OPTION_VALUE (i, name));
}
}
- for (i = 0; binary_o_options[i].name; i++)
- {
- if (STREQ (name, binary_o_options[i].name))
- return (GET_BINARY_O_OPTION_VALUE (i, name));
- }
-
+
return (-1);
}
register int i;
int *on_or_off, value;
- for (value = i = 0; o_options[i].name; i++)
- {
- on_or_off = find_flag (o_options[i].letter);
- if (on_or_off == FLAG_UNKNOWN)
- on_or_off = &value;
- if (mode == -1 || mode == *on_or_off)
- print_minus_o_option (o_options[i].name, *on_or_off, reusable);
- }
- for (i = 0; binary_o_options[i].name; i++)
+ for (i = 0; o_options[i].name; i++)
{
- value = GET_BINARY_O_OPTION_VALUE (i, binary_o_options[i].name);
- if (mode == -1 || mode == value)
- print_minus_o_option (binary_o_options[i].name, value, reusable);
+ if (o_options[i].letter)
+ {
+ value = 0;
+ on_or_off = find_flag (o_options[i].letter);
+ if (on_or_off == FLAG_UNKNOWN)
+ on_or_off = &value;
+ if (mode == -1 || mode == *on_or_off)
+ print_minus_o_option (o_options[i].name, *on_or_off, reusable);
+ }
+ else
+ {
+ value = GET_BINARY_O_OPTION_VALUE (i, o_options[i].name);
+ if (mode == -1 || mode == value)
+ print_minus_o_option (o_options[i].name, value, reusable);
+ }
}
}
+char **
+get_minus_o_opts ()
+{
+ char **ret;
+ int i;
+
+ ret = strvec_create (N_O_OPTIONS + 1);
+ for (i = 0; o_options[i].name; i++)
+ ret[i] = o_options[i].name;
+ ret[i] = (char *)NULL;
+ return ret;
+}
+
static int
set_ignoreeof (on_or_off, option_name)
int on_or_off;
ignoreeof = on_or_off == FLAG_ON;
unbind_variable ("ignoreeof");
if (ignoreeof)
- bind_variable ("IGNOREEOF", "10");
+ bind_variable ("IGNOREEOF", "10", 0);
else
unbind_variable ("IGNOREEOF");
sv_ignoreeof ("IGNOREEOF");
if (posixly_correct == 0)
unbind_variable ("POSIXLY_CORRECT");
else
- bind_variable ("POSIXLY_CORRECT", "y");
+ bind_variable ("POSIXLY_CORRECT", "y", 0);
sv_strict_posix ("POSIXLY_CORRECT");
return (0);
}
int on_or_off;
char *option_name;
{
- int option_char;
- VFunction *set_func;
register int i;
- for (i = 0; binary_o_options[i].name; i++)
+ for (i = 0; o_options[i].name; i++)
{
- if (STREQ (option_name, binary_o_options[i].name))
+ if (STREQ (option_name, o_options[i].name))
{
- SET_BINARY_O_OPTION_VALUE (i, on_or_off, option_name);
- return (EXECUTION_SUCCESS);
+ if (o_options[i].letter == 0)
+ {
+ SET_BINARY_O_OPTION_VALUE (i, on_or_off, option_name);
+ return (EXECUTION_SUCCESS);
+ }
+ else
+ {
+ if (change_flag (o_options[i].letter, on_or_off) == FLAG_ERROR)
+ {
+ sh_invalidoptname (option_name);
+ return (EXECUTION_FAILURE);
+ }
+ else
+ return (EXECUTION_SUCCESS);
+ }
+
}
}
- for (i = 0, option_char = -1, set_func = 0; o_options[i].name; i++)
- {
- if (STREQ (option_name, o_options[i].name))
- {
- option_char = o_options[i].letter;
- break;
- }
- }
- if (option_char == -1)
- {
- builtin_error ("%s: unknown option name", option_name);
- return (EXECUTION_FAILURE);
- }
- if (change_flag (option_char, on_or_off) == FLAG_ERROR)
- {
- bad_option (option_name);
- return (EXECUTION_FAILURE);
- }
- return (EXECUTION_SUCCESS);
+ sh_invalidoptname (option_name);
+ return (EXECUTION_FAILURE);
}
static void
free (vars);
}
- vars = all_shell_functions ();
- if (vars)
+ /* POSIX.2 does not allow function names and definitions to be output when
+ `set' is invoked without options (PASC Interp #202). */
+ if (posixly_correct == 0)
{
- print_var_list (vars);
- free (vars);
+ vars = all_shell_functions ();
+ if (vars)
+ {
+ print_func_list (vars);
+ free (vars);
+ }
}
}
set_shellopts ()
{
char *value;
+ char tflag[N_O_OPTIONS];
int vsize, i, vptr, *ip, exported;
SHELL_VAR *v;
for (vsize = i = 0; o_options[i].name; i++)
{
- ip = find_flag (o_options[i].letter);
- if (ip && *ip)
- vsize += strlen (o_options[i].name) + 1;
+ tflag[i] = 0;
+ if (o_options[i].letter)
+ {
+ ip = find_flag (o_options[i].letter);
+ if (ip && *ip)
+ {
+ vsize += strlen (o_options[i].name) + 1;
+ tflag[i] = 1;
+ }
+ }
+ else if (GET_BINARY_O_OPTION_VALUE (i, o_options[i].name))
+ {
+ vsize += strlen (o_options[i].name) + 1;
+ tflag[i] = 1;
+ }
}
- for (i = 0; binary_o_options[i].name; i++)
- if (GET_BINARY_O_OPTION_VALUE (i, binary_o_options[i].name))
- vsize += strlen (binary_o_options[i].name) + 1;
- value = xmalloc (vsize + 1);
+ value = (char *)xmalloc (vsize + 1);
for (i = vptr = 0; o_options[i].name; i++)
{
- ip = find_flag (o_options[i].letter);
- if (ip && *ip)
+ if (tflag[i])
{
strcpy (value + vptr, o_options[i].name);
vptr += strlen (o_options[i].name);
value[vptr++] = ':';
}
}
- for (i = 0; binary_o_options[i].name; i++)
- if (GET_BINARY_O_OPTION_VALUE (i, binary_o_options[i].name))
- {
- strcpy (value + vptr, binary_o_options[i].name);
- vptr += strlen (binary_o_options[i].name);
- value[vptr++] = ':';
- }
+
if (vptr)
vptr--; /* cut off trailing colon */
value[vptr] = '\0';
note whether or not the variable was exported. */
if (v)
{
- v->attributes &= ~att_readonly;
+ VUNSETATTR (v, att_readonly);
exported = exported_p (v);
}
else
exported = 0;
- v = bind_variable ("SHELLOPTS", value);
+ v = bind_variable ("SHELLOPTS", value, 0);
/* Turn the read-only attribute back on, and turn off the export attribute
if it was set implicitly by mark_modified_vars and SHELLOPTS was not
exported before we bound the new value. */
- v->attributes |= att_readonly;
+ VSETATTR (v, att_readonly);
if (mark_modified_vars && exported == 0 && exported_p (v))
- v->attributes &= ~att_exported;
+ VUNSETATTR (v, att_exported);
free (value);
}
set_shellopts ();
}
-/* Reset the values of the -o options that are not also shell flags. */
+/* Reset the values of the -o options that are not also shell flags. This is
+ called from execute_cmd.c:initialize_subshell() when setting up a subshell
+ to run an executable shell script without a leading `#!'. */
void
reset_shell_options ()
{
#if defined (HISTORY)
remember_on_history = 1;
#endif
- ignoreeof = posixly_correct = 0;
+ ignoreeof = 0;
}
/* Set some flags from the word values in the input list. If LIST is empty,
int on_or_off, flag_name, force_assignment, opts_changed;
WORD_LIST *l;
register char *arg;
+ char s[3];
if (list == 0)
{
}
/* Check validity of flag arguments. */
- if (*list->word->word == '-' || *list->word->word == '+')
+ reset_internal_getopt ();
+ while ((flag_name = internal_getopt (list, optflags)) != -1)
{
- for (l = list; l && (arg = l->word->word); l = l->next)
+ switch (flag_name)
{
- char c;
-
- if (arg[0] != '-' && arg[0] != '+')
+ case '?':
+ builtin_usage ();
+ return (list_optopt == '?' ? EXECUTION_SUCCESS : EX_USAGE);
+ default:
break;
-
- /* `-' or `--' signifies end of flag arguments. */
- if (arg[0] == '-' && (!arg[1] || (arg[1] == '-' && !arg[2])))
- break;
-
- while (c = *++arg)
- {
- if (find_flag (c) == FLAG_UNKNOWN && c != 'o')
- {
- char s[2];
- s[0] = c; s[1] = '\0';
- bad_option (s);
- if (c == '?')
- builtin_usage ();
- return (c == '?' ? EXECUTION_SUCCESS : EXECUTION_FAILURE);
- }
- }
}
}
-
+
/* Do the set command. While the list consists of words starting with
'-' or '+' treat them as flags, otherwise, start assigning them to
$1 ... $n. */
}
else if (change_flag (flag_name, on_or_off) == FLAG_ERROR)
{
- char opt[3];
- opt[0] = on_or_off;
- opt[1] = flag_name;
- opt[2] = '\0';
- bad_option (opt);
+ s[0] = on_or_off;
+ s[1] = flag_name;
+ s[2] = '\0';
+ sh_invalidopt (s);
builtin_usage ();
set_shellopts ();
return (EXECUTION_FAILURE);
the `-v', unset will only act on variables. Given the `-f' flag,
unset will only act on functions. With neither flag, unset first
tries to unset a variable, and if that fails, then tries to unset a
-function. Some variables (such as PATH and IFS) cannot be unset; also
-see readonly.
+function. Some variables cannot be unset; also see readonly.
$END
#define NEXT_VARIABLE() any_failed++; list = list->next; continue;
if (unset_function && unset_variable)
{
- builtin_error ("cannot simultaneously unset a function and a variable");
+ builtin_error (_("cannot simultaneously unset a function and a variable"));
return (EXECUTION_FAILURE);
}
name = list->word->word;
#if defined (ARRAY_VARS)
+ unset_array = 0;
if (!unset_function && valid_array_reference (name))
{
t = strchr (name, '[');
to be created when not in posix mode, so check only when in posix
mode when unsetting a function. */
if (((unset_function && posixly_correct) || !unset_function) && legal_identifier (name) == 0)
- {
- builtin_error ("`%s': not a valid identifier", name);
- NEXT_VARIABLE ();
- }
+ {
+ sh_invalidid (name);
+ NEXT_VARIABLE ();
+ }
var = unset_function ? find_function (name) : find_variable (name);
if (var && !unset_function && non_unsettable_p (var))
{
- builtin_error ("%s: cannot unset", name);
+ builtin_error (_("%s: cannot unset"), name);
NEXT_VARIABLE ();
}
/* Posix.2 says that unsetting readonly variables is an error. */
if (var && readonly_p (var))
{
- builtin_error ("%s: cannot unset: readonly %s",
+ builtin_error (_("%s: cannot unset: readonly %s"),
name, unset_function ? "function" : "variable");
NEXT_VARIABLE ();
}
{
if (array_p (var) == 0)
{
- builtin_error ("%s: not an array variable", name);
+ builtin_error (_("%s: not an array variable"), name);
NEXT_VARIABLE ();
}
else
- tem = unbind_array_element (var, t);
+ {
+ tem = unbind_array_element (var, t);
+ if (tem == -1)
+ any_failed++;
+ }
}
else
#endif /* ARRAY_VARS */
- tem = makunbound (name, unset_function ? shell_functions : shell_variables);
+ tem = unset_function ? unbind_func (name) : unbind_variable (name);
/* This is what Posix.2 draft 11+ says. ``If neither -f nor -v
is specified, the name refers to a variable; if a variable by
that name does not exist, a function by that name, if any,
shall be unset.'' */
if (tem == -1 && !unset_function && !unset_variable)
- tem = makunbound (name, shell_functions);
+ tem = unbind_func (name);
+
+ /* SUSv3, POSIX.1-2001 say: ``Unsetting a variable or function that
+ was not previously set shall not be considered an error.'' */
- if (tem == -1)
- any_failed++;
- else if (!unset_function)
+ if (unset_function == 0)
stupidly_hack_special_variables (name);
list = list->next;
projects / platform / upstream / bash.git / blobdiff