path: root/builtins/shopt.c

/* shopt.c, created from shopt.def. */
#line 22 "./shopt.def"

#line 43 "./shopt.def"

#include <config.h>

#if defined (HAVE_UNISTD_H)
#  ifdef _MINIX
#    include <sys/types.h>
#  endif
#  include <unistd.h>
#endif

#include <stdio.h>

#include "version.h"

#include "../bashintl.h"

#include "../shell.h"
#include "../flags.h"
#include "common.h"
#include "bashgetopt.h"

#if defined (HISTORY)
#  include "../bashhist.h"
#endif

#define UNSETOPT	0
#define SETOPT		1

#define OPTFMT		"%-15s\t%s\n"

extern int allow_null_glob_expansion, fail_glob_expansion, glob_dot_filenames;
extern int cdable_vars, mail_warning, source_uses_path;
extern int no_exit_on_failed_exec, print_shift_error;
extern int check_hashed_filenames, promptvars;
extern int cdspelling, expand_aliases;
extern int extended_quote;
extern int check_window_size;
extern int glob_ignore_case, match_ignore_case;
extern int hup_on_exit;
extern int xpg_echo;
extern int gnu_error_format;
extern int check_jobs_at_exit;
extern int autocd;
extern int glob_star;

#if defined (EXTENDED_GLOB)
extern int extended_glob;
#endif

#if defined (READLINE)
extern int hist_verify, history_reediting, perform_hostname_completion;
extern int no_empty_command_completion;
extern int force_fignore;
extern int dircomplete_spelling;

extern int enable_hostname_completion __P((int));
#endif

#if defined (PROGRAMMABLE_COMPLETION)
extern int prog_completion_enabled;
#endif

#if defined (RESTRICTED_SHELL)
extern char *shell_name;
#endif

#if defined (DEBUGGER)
extern int debugging_mode;
#endif

static void shopt_error __P((char *));

static int set_shellopts_after_change __P((char *, int));
static int shopt_enable_hostname_completion __P((char *, int));
static int set_compatibility_level __P((char *, int));

#if defined (RESTRICTED_SHELL)
static int set_restricted_shell __P((char *, int));
#endif

static int shopt_login_shell;
static int shopt_compat31;
static int shopt_compat32;
static int shopt_compat40;

typedef int shopt_set_func_t __P((char *, int));

static struct {
  char *name;
  int  *value;
  shopt_set_func_t *set_func;
} shopt_vars[] = {
  { "autocd", &autocd, (shopt_set_func_t *)NULL },
  { "cdable_vars", &cdable_vars, (shopt_set_func_t *)NULL },
  { "cdspell", &cdspelling, (shopt_set_func_t *)NULL },
  { "checkhash", &check_hashed_filenames, (shopt_set_func_t *)NULL },
#if defined (JOB_CONTROL)
  { "checkjobs", &check_jobs_at_exit, (shopt_set_func_t *)NULL },
#endif
  { "checkwinsize", &check_window_size, (shopt_set_func_t *)NULL },
#if defined (HISTORY)
  { "cmdhist", &command_oriented_history, (shopt_set_func_t *)NULL },
#endif
  { "compat31", &shopt_compat31, set_compatibility_level },
  { "compat32", &shopt_compat32, set_compatibility_level },
  { "compat40", &shopt_compat40, set_compatibility_level },
#if defined (READLINE)
  { "dirspell", &dircomplete_spelling, (shopt_set_func_t *)NULL },
#endif
  { "dotglob", &glob_dot_filenames, (shopt_set_func_t *)NULL },
  { "execfail", &no_exit_on_failed_exec, (shopt_set_func_t *)NULL },
  { "expand_aliases", &expand_aliases, (shopt_set_func_t *)NULL },
#if defined (DEBUGGER)
  { "extdebug", &debugging_mode, (shopt_set_func_t *)NULL },
#endif
#if defined (EXTENDED_GLOB)
  { "extglob", &extended_glob, (shopt_set_func_t *)NULL },
#endif
  { "extquote", &extended_quote, (shopt_set_func_t *)NULL },
  { "failglob", &fail_glob_expansion, (shopt_set_func_t *)NULL },
#if defined (READLINE)
  { "force_fignore", &force_fignore, (shopt_set_func_t *)NULL },
#endif
  { "globstar", &glob_star, (shopt_set_func_t *)NULL },
  { "gnu_errfmt", &gnu_error_format, (shopt_set_func_t *)NULL },
#if defined (HISTORY)
  { "histappend", &force_append_history, (shopt_set_func_t *)NULL },
#endif
#if defined (READLINE)
  { "histreedit", &history_reediting, (shopt_set_func_t *)NULL },
  { "histverify", &hist_verify, (shopt_set_func_t *)NULL },
  { "hostcomplete", &perform_hostname_completion, shopt_enable_hostname_completion },
#endif
  { "huponexit", &hup_on_exit, (shopt_set_func_t *)NULL },
  { "interactive_comments", &interactive_comments, set_shellopts_after_change },
#if defined (HISTORY)
  { "lithist", &literal_history, (shopt_set_func_t *)NULL },
#endif
  { "login_shell", &shopt_login_shell, set_login_shell },
  { "mailwarn", &mail_warning, (shopt_set_func_t *)NULL },
#if defined (READLINE)
  { "no_empty_cmd_completion", &no_empty_command_completion, (shopt_set_func_t *)NULL },
#endif
  { "nocaseglob", &glob_ignore_case, (shopt_set_func_t *)NULL },
  { "nocasematch", &match_ignore_case, (shopt_set_func_t *)NULL },
  { "nullglob",	&allow_null_glob_expansion, (shopt_set_func_t *)NULL },
#if defined (PROGRAMMABLE_COMPLETION)
  { "progcomp", &prog_completion_enabled, (shopt_set_func_t *)NULL },
#endif
  { "promptvars", &promptvars, (shopt_set_func_t *)NULL },
#if defined (RESTRICTED_SHELL)
  { "restricted_shell", &restricted_shell, set_restricted_shell },
#endif
  { "shift_verbose", &print_shift_error, (shopt_set_func_t *)NULL },
  { "sourcepath", &source_uses_path, (shopt_set_func_t *)NULL },
  { "xpg_echo", &xpg_echo, (shopt_set_func_t *)NULL },
  { (char *)0, (int *)0, (shopt_set_func_t *)NULL }
};

#define N_SHOPT_OPTIONS		(sizeof (shopt_vars) / sizeof (shopt_vars[0]))

#define GET_SHOPT_OPTION_VALUE(i)	(*shopt_vars[i].value)

static const char * const on = "on";
static const char * const off = "off";

static int find_shopt __P((char *));
static int toggle_shopts __P((int, WORD_LIST *, int));
static void print_shopt __P((char *, int, int));
static int list_shopts __P((WORD_LIST *, int));
static int list_some_shopts __P((int, int));
static int list_shopt_o_options __P((WORD_LIST *, int));
static int list_some_o_options __P((int, int));
static int set_shopt_o_options __P((int, WORD_LIST *, int));

#define SFLAG	0x01
#define UFLAG	0x02
#define QFLAG	0x04
#define OFLAG	0x08
#define PFLAG	0x10

int
shopt_builtin (list)
     WORD_LIST *list;
{
  int opt, flags, rval;

  flags = 0;
  reset_internal_getopt ();
  while ((opt = internal_getopt (list, "psuoq")) != -1)
    {
      switch (opt)
	{
	case 's':
	  flags |= SFLAG;
	  break;
	case 'u':
	  flags |= UFLAG;
	  break;
	case 'q':
	  flags |= QFLAG;
	  break;
	case 'o':
	  flags |= OFLAG;
	  break;
	case 'p':
	  flags |= PFLAG;
	  break;
	default:
	  builtin_usage ();
	  return (EX_USAGE);
	}
    }
  list = loptend;

  if ((flags & (SFLAG|UFLAG)) == (SFLAG|UFLAG))
    {
      builtin_error (_("cannot set and unset shell options simultaneously"));
      return (EXECUTION_FAILURE);
    }

  rval = EXECUTION_SUCCESS;
  if ((flags & OFLAG) && ((flags & (SFLAG|UFLAG)) == 0))	/* shopt -o */
    rval = list_shopt_o_options (list, flags);
  else if (list && (flags & OFLAG))		/* shopt -so args */
    rval = set_shopt_o_options ((flags & SFLAG) ? FLAG_ON : FLAG_OFF, list, flags & QFLAG);
  else if (flags & OFLAG)	/* shopt -so */
    rval = list_some_o_options ((flags & SFLAG) ? 1 : 0, flags);
  else if (list && (flags & (SFLAG|UFLAG)))	/* shopt -su args */
    rval = toggle_shopts ((flags & SFLAG) ? SETOPT : UNSETOPT, list, flags & QFLAG);
  else if ((flags & (SFLAG|UFLAG)) == 0)	/* shopt [args] */
    rval = list_shopts (list, flags);
  else						/* shopt -su */
    rval = list_some_shopts ((flags & SFLAG) ? SETOPT : UNSETOPT, flags);
  return (rval);
}

/* Reset the options managed by `shopt' to the values they would have at
   shell startup. */
void
reset_shopt_options ()
{
  allow_null_glob_expansion = glob_dot_filenames = 0;
  cdable_vars = mail_warning = 0;
  no_exit_on_failed_exec = print_shift_error = 0;
  check_hashed_filenames = cdspelling = expand_aliases = check_window_size = 0;

  source_uses_path = promptvars = 1;

#if defined (EXTENDED_GLOB)
  extended_glob = 0;
#endif

#if defined (HISTORY)
  literal_history = force_append_history = 0;
  command_oriented_history = 1;
#endif

#if defined (READLINE)
  hist_verify = history_reediting = 0;
  perform_hostname_completion = 1;
#endif

  shopt_login_shell = login_shell;
}

static int
find_shopt (name)
     char *name;
{
  int i;

  for (i = 0; shopt_vars[i].name; i++)
    if (STREQ (name, shopt_vars[i].name))
      return i;
  return -1;
}

static void
shopt_error (s)
     char *s;
{
  builtin_error (_("%s: invalid shell option name"), s);
}

static int
toggle_shopts (mode, list, quiet)
     int mode;
     WORD_LIST *list;
     int quiet;
{
  WORD_LIST *l;
  int ind, rval;

  for (l = list, rval = EXECUTION_SUCCESS; l; l = l->next)
    {
      ind = find_shopt (l->word->word);
      if (ind < 0)
	{
	  shopt_error (l->word->word);
	  rval = EXECUTION_FAILURE;
	}
      else
	{
	  *shopt_vars[ind].value = mode;	/* 1 for set, 0 for unset */
	  if (shopt_vars[ind].set_func)
	    (*shopt_vars[ind].set_func) (shopt_vars[ind].name, mode);
	}
    }

  set_bashopts ();
  return (rval);
}

static void
print_shopt (name, val, flags)
     char *name;
     int val, flags;
{
  if (flags & PFLAG)
    printf ("shopt %s %s\n", val ? "-s" : "-u", name);
  else
    printf (OPTFMT, name, val ? on : off);
}

/* List the values of all or any of the `shopt' options.  Returns 0 if
   all were listed or all variables queried were on; 1 otherwise. */
static int
list_shopts (list, flags)
     WORD_LIST *list;
     int flags;
{
  WORD_LIST *l;
  int i, val, rval;

  if (list == 0)
    {
      for (i = 0; shopt_vars[i].name; i++)
	{
	  val = *shopt_vars[i].value;
	  if ((flags & QFLAG) == 0)
	    print_shopt (shopt_vars[i].name, val, flags);
	}
      return (sh_chkwrite (EXECUTION_SUCCESS));
    }

  for (l = list, rval = EXECUTION_SUCCESS; l; l = l->next)
    {
      i = find_shopt (l->word->word);
      if (i < 0)
	{
	  shopt_error (l->word->word);
	  rval = EXECUTION_FAILURE;
	  continue;
	}
      val = *shopt_vars[i].value;
      if (val == 0)
	rval = EXECUTION_FAILURE;
      if ((flags & QFLAG) == 0)
	print_shopt (l->word->word, val, flags);
    }

  return (sh_chkwrite (rval));
}

static int
list_some_shopts (mode, flags)
     int mode, flags;
{
  int val, i;

  for (i = 0; shopt_vars[i].name; i++)
    {
      val = *shopt_vars[i].value;
      if (((flags & QFLAG) == 0) && mode == val)
	print_shopt (shopt_vars[i].name, val, flags);
    }
  return (sh_chkwrite (EXECUTION_SUCCESS));
}

static int
list_shopt_o_options (list, flags)
     WORD_LIST *list;
     int flags;
{
  WORD_LIST *l;
  int val, rval;

  if (list == 0)
    {
      if ((flags & QFLAG) == 0)
	list_minus_o_opts (-1, (flags & PFLAG));
      return (sh_chkwrite (EXECUTION_SUCCESS));
    }

  for (l = list, rval = EXECUTION_SUCCESS; l; l = l->next)
    {
      val = minus_o_option_value (l->word->word);
      if (val == -1)
	{
	  sh_invalidoptname (l->word->word);
	  rval = EXECUTION_FAILURE;
	  continue;
	}
      if (val == 0)
	rval = EXECUTION_FAILURE;
      if ((flags & QFLAG) == 0)
	{
	  if (flags & PFLAG)
	    printf ("set %co %s\n", val ? '-' : '+', l->word->word);
	  else
	    printf (OPTFMT, l->word->word, val ? on : off);
	}
    }
  return (sh_chkwrite (rval));
}

static int
list_some_o_options (mode, flags)
     int mode, flags;
{
  if ((flags & QFLAG) == 0)
    list_minus_o_opts (mode, (flags & PFLAG));
  return (sh_chkwrite (EXECUTION_SUCCESS));
}

static int
set_shopt_o_options (mode, list, quiet)
     int mode;
     WORD_LIST *list;
     int quiet;
{
  WORD_LIST *l;
  int rval;

  for (l = list, rval = EXECUTION_SUCCESS; l; l = l->next)
    {
      if (set_minus_o_option (mode, l->word->word) == EXECUTION_FAILURE)
	rval = EXECUTION_FAILURE;
    }
  set_shellopts ();
  return rval;
}

/* If we set or unset interactive_comments with shopt, make sure the
   change is reflected in $SHELLOPTS. */
static int
set_shellopts_after_change (option_name, mode)
     char *option_name;
     int mode;
{
  set_shellopts ();
  return (0);
}

static int
shopt_enable_hostname_completion (option_name, mode)
     char *option_name;
     int mode;
{
  return (enable_hostname_completion (mode));
}

static int
set_compatibility_level (option_name, mode)
     char *option_name;
     int mode;
{
  /* Need to change logic here as we add more compatibility levels */

  /* First, check option_name so we can turn off other compat options when
     one is set. */
  if (mode && option_name[6] == '3' && option_name[7] == '1')
    shopt_compat32 = shopt_compat40 = 0;
  else if (mode && option_name[6] == '3' && option_name[7] == '2')
    shopt_compat31 = shopt_compat40 = 0;
  else if (mode && option_name[6] == '4' && option_name[7] == '0')
    shopt_compat31 = shopt_compat32 = 0;

  /* Then set shell_compatibility_level based on what remains */
  if (shopt_compat31)
    shell_compatibility_level = 31;
  else if (shopt_compat32)
    shell_compatibility_level = 32;
  else if (shopt_compat40)
    shell_compatibility_level = 40;
  else
    shell_compatibility_level = DEFAULT_COMPAT_LEVEL;
  return 0;
}

#if defined (RESTRICTED_SHELL)
/* Don't allow the value of restricted_shell to be modified. */

static int
set_restricted_shell (option_name, mode)
     char *option_name;
     int mode;
{
  static int save_restricted = -1;

  if (save_restricted == -1)
    save_restricted = shell_is_restricted (shell_name);

  restricted_shell = save_restricted;
  return (0);
}
#endif /* RESTRICTED_SHELL */

/* Not static so shell.c can call it to initialize shopt_login_shell */
int
set_login_shell (option_name, mode)
     char *option_name;
     int mode;
{
  shopt_login_shell = login_shell != 0;
  return (0);
}

char **
get_shopt_options ()
{
  char **ret;
  int n, i;

  n = sizeof (shopt_vars) / sizeof (shopt_vars[0]);
  ret = strvec_create (n + 1);
  for (i = 0; shopt_vars[i].name; i++)
    ret[i] = savestring (shopt_vars[i].name);
  ret[i] = (char *)NULL;
  return ret;
}

/*
 * External interface for other parts of the shell.  NAME is a string option;
 * MODE is 0 if we want to unset an option; 1 if we want to set an option.
 * REUSABLE is 1 if we want to print output in a form that may be reused.
 */
int
shopt_setopt (name, mode)
     char *name;
     int mode;
{
  WORD_LIST *wl;
  int r;

  wl = add_string_to_list (name, (WORD_LIST *)NULL);
  r = toggle_shopts (mode, wl, 0);
  dispose_words (wl);
  return r;
}

int
shopt_listopt (name, reusable)
     char *name;
     int reusable;
{
  int i;

  if (name == 0)
    return (list_shopts ((WORD_LIST *)NULL, reusable ? PFLAG : 0));

  i = find_shopt (name);
  if (i < 0)
    {
      shopt_error (name);
      return (EXECUTION_FAILURE);
    }

  print_shopt (name, *shopt_vars[i].value, reusable ? PFLAG : 0);
  return (sh_chkwrite (EXECUTION_SUCCESS));
}

void
set_bashopts ()
{
  char *value;
  char tflag[N_SHOPT_OPTIONS];
  int vsize, i, vptr, *ip, exported;
  SHELL_VAR *v;

  for (vsize = i = 0; shopt_vars[i].name; i++)
    {
      tflag[i] = 0;
      if (GET_SHOPT_OPTION_VALUE (i))
	{
	  vsize += strlen (shopt_vars[i].name) + 1;
	  tflag[i] = 1;
	}
    }

  value = (char *)xmalloc (vsize + 1);

  for (i = vptr = 0; shopt_vars[i].name; i++)
    {
      if (tflag[i])
	{
	  strcpy (value + vptr, shopt_vars[i].name);
	  vptr += strlen (shopt_vars[i].name);
	  value[vptr++] = ':';
	}
    }

  if (vptr)
    vptr--;			/* cut off trailing colon */
  value[vptr] = '\0';

  v = find_variable ("BASHOPTS");

  /* Turn off the read-only attribute so we can bind the new value, and
     note whether or not the variable was exported. */
  if (v)
    {
      VUNSETATTR (v, att_readonly);
      exported = exported_p (v);
    }
  else
    exported = 0;

  v = bind_variable ("BASHOPTS", 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. */
  VSETATTR (v, att_readonly);
  if (mark_modified_vars && exported == 0 && exported_p (v))
    VUNSETATTR (v, att_exported);

  free (value);
}

void
parse_bashopts (value)
     char *value;
{
  char *vname;
  int vptr, ind;

  vptr = 0;
  while (vname = extract_colon_unit (value, &vptr))
    {
      ind = find_shopt (vname);
      if (ind >= 0)
        *shopt_vars[ind].value = 1;
      free (vname);
    }
}

void
initialize_bashopts (no_bashopts)
     int no_bashopts;
{
  char *temp;
  SHELL_VAR *var;

  if (no_bashopts == 0)
    {
      var = find_variable ("BASHOPTS");
      /* set up any shell options we may have inherited. */
      if (var && imported_p (var))
	{
	  temp = (array_p (var) || assoc_p (var)) ? (char *)NULL : savestring (value_cell (var));
	  if (temp)
	    {
	      parse_bashopts (temp);
	      free (temp);
	    }
	}
    }

  /* Set up the $BASHOPTS variable. */
  set_bashopts ();
}