This file is history.def, from which is created history.c.
It implements the builtin "history" in Bash.
-Copyright (C) 1987, 1989, 1991 Free Software Foundation, Inc.
+Copyright (C) 1987-2009 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
-version.
+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 3 of the License, or
+(at your option) any later version.
-Bash is distributed in the hope that it will be useful, but WITHOUT ANY
-WARRANTY; without even the implied warranty of MERCHANTABILITY or
-FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-for more details.
+Bash is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
-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.
+You should have received a copy of the GNU General Public License
+along with Bash. If not, see <http://www.gnu.org/licenses/>.
$PRODUCES history.c
$BUILTIN history
$FUNCTION history_builtin
$DEPENDS_ON HISTORY
-$SHORT_DOC history [-c] [n] or history -awrn [filename] or history -ps arg [arg...]
-Display the history list with line numbers. Lines listed with
-with a `*' have been modified. Argument of N says to list only
-the last N lines. The -c option causes the history list to be
-cleared by deleting all of the entries. The `-w' option writes out the
-current history to the history file; `-r' means to read the file and
-append the contents to the history list instead. `-a' means
-to append history lines from this session to the history file.
-Argument `-n' means to read all history lines not already read
-from the history file and append them to the history list. If
-FILENAME is given, then that is used as the history file else
+$SHORT_DOC history [-c] [-d offset] [n] or history -anrw [filename] or history -ps arg [arg...]
+Display or manipulate the history list.
+
+Display the history list with line numbers, prefixing each modified
+entry with a `*'. An argument of N lists only the last N entries.
+
+Options:
+ -c clear the history list by deleting all of the entries
+ -d offset delete the history entry at offset OFFSET.
+
+ -a append history lines from this session to the history file
+ -n read all history lines not already read from the history file
+ -r read the history file and append the contents to the history
+ list
+ -w write the current history to the history file
+ and append them to the history list
+
+ -p perform history expansion on each ARG and display the result
+ without storing it in the history list
+ -s append the ARGs to the history list as a single entry
+
+If FILENAME is given, it is used as the history file. Otherwise,
if $HISTFILE has a value, that is used, else ~/.bash_history.
-If the -s option is supplied, the non-option ARGs are appended to
-the history list as a single entry. The -p option means to perform
-history expansion on each ARG and display the result, without storing
-anything in the history list.
+
+If the $HISTTIMEFORMAT variable is set and not null, its value is used
+as a format string for strftime(3) to print the time stamp associated
+with each displayed history entry. No time stamps are printed otherwise.
+
+Exit Status:
+Returns success unless an invalid option is given or an error occurs.
$END
#include <config.h>
#if defined (HISTORY)
#include "../bashtypes.h"
-#include <sys/file.h>
-#include "../posixstat.h"
-#include "../filecntl.h"
+#if ! defined(_MINIX) && defined (HAVE_SYS_FILE_H)
+# include <sys/file.h>
+#endif
+#include "posixstat.h"
+#include "filecntl.h"
#include <errno.h>
#include <stdio.h>
#if defined (HAVE_UNISTD_H)
#endif
#include "../bashansi.h"
+#include "../bashintl.h"
#include "../shell.h"
#include "../bashhist.h"
extern int errno;
#endif
-static void display_history ();
-static void push_history ();
-static int expand_and_print_history ();
+extern int current_command_line_count;
+extern int force_append_history; /* shopt -s histappend */
+
+static char *histtime __P((HIST_ENTRY *, const char *));
+static int display_history __P((WORD_LIST *));
+static void push_history __P((WORD_LIST *));
+static int expand_and_print_history __P((WORD_LIST *));
#define AFLAG 0x01
#define RFLAG 0x02
#define SFLAG 0x10
#define PFLAG 0x20
#define CFLAG 0x40
+#define DFLAG 0x80
int
history_builtin (list)
WORD_LIST *list;
{
- int flags, opt, result;
- char *filename;
+ int flags, opt, result, old_history_lines, obase;
+ char *filename, *delete_arg;
+ intmax_t delete_offset;
flags = 0;
reset_internal_getopt ();
- while ((opt = internal_getopt (list, "acnpsrw")) != -1)
+ while ((opt = internal_getopt (list, "acd:npsrw")) != -1)
{
switch (opt)
{
case 's':
flags |= SFLAG;
break;
+ case 'd':
+ flags |= DFLAG;
+ delete_arg = list_optarg;
+ break;
case 'p':
#if defined (BANG_HISTORY)
flags |= PFLAG;
opt = flags & (AFLAG|RFLAG|WFLAG|NFLAG);
if (opt && opt != AFLAG && opt != RFLAG && opt != WFLAG && opt != NFLAG)
{
- builtin_error ("cannot use more than one of -anrw");
+ builtin_error (_("cannot use more than one of -anrw"));
return (EXECUTION_FAILURE);
}
/* clear the history, but allow other arguments to add to it again. */
if (flags & CFLAG)
{
- clear_history ();
+ bash_clear_history ();
if (list == 0)
return (EXECUTION_SUCCESS);
}
else if (flags & PFLAG)
{
if (list)
- return (expand_and_print_history (list));
- return (EXECUTION_SUCCESS);
+ return (expand_and_print_history (list));
+ return (sh_chkwrite (EXECUTION_SUCCESS));
}
#endif
+ else if (flags & DFLAG)
+ {
+ if ((legal_number (delete_arg, &delete_offset) == 0)
+ || (delete_offset < history_base)
+ || (delete_offset > (history_base + history_length)))
+ {
+ sh_erange (delete_arg, _("history position"));
+ return (EXECUTION_FAILURE);
+ }
+ opt = delete_offset;
+ result = bash_delete_histent (opt - history_base);
+ /* Since remove_history changes history_length, this can happen if
+ we delete the last history entry. */
+ if (where_history () > history_length)
+ history_set_pos (history_length);
+ return (result ? EXECUTION_SUCCESS : EXECUTION_FAILURE);
+ }
else if ((flags & (AFLAG|RFLAG|NFLAG|WFLAG|CFLAG)) == 0)
{
- display_history (list);
- return (EXECUTION_SUCCESS);
+ result = display_history (list);
+ return (sh_chkwrite (result));
}
filename = list ? list->word->word : get_string_value ("HISTFILE");
else if (flags & NFLAG) /* Read `new' history from file. */
{
/* Read all of the lines in the file that we haven't already read. */
+ old_history_lines = history_lines_in_file;
+ obase = history_base;
+
using_history ();
result = read_history_range (filename, history_lines_in_file, -1);
using_history ();
+
history_lines_in_file = where_history ();
+
+ /* If we're rewriting the history file at shell exit rather than just
+ appending the lines from this session to it, the question is whether
+ we reset history_lines_this_session to 0, losing any history entries
+ we had before we read the new entries from the history file, or
+ whether we count the new entries we just read from the file as
+ history lines added during this session.
+ Right now, we do the latter. This will cause these history entries
+ to be written to the history file along with any intermediate entries
+ we add when we do a `history -a', but the alternative is losing
+ them altogether. */
+ if (force_append_history == 0)
+ history_lines_this_session += history_lines_in_file - old_history_lines +
+ history_base - obase;
}
return (result ? EXECUTION_FAILURE : EXECUTION_SUCCESS);
#define histline(i) (hlist[(i)]->line)
#define histdata(i) (hlist[(i)]->data)
-static void
+static char *
+histtime (hlist, histtimefmt)
+ HIST_ENTRY *hlist;
+ const char *histtimefmt;
+{
+ static char timestr[128];
+ time_t t;
+
+ t = history_get_time (hlist);
+ if (t)
+ strftime (timestr, sizeof (timestr), histtimefmt, localtime (&t));
+ else
+ strcpy (timestr, "??");
+ return timestr;
+}
+
+static int
display_history (list)
WORD_LIST *list;
{
register int i;
- int limited, limit;
+ intmax_t limit;
HIST_ENTRY **hlist;
+ char *histtimefmt, *timestr;
if (list)
{
- limited = 1;
- limit = get_numeric_arg (list, 0);
+ if (get_numeric_arg (list, 0, &limit) == 0)
+ return (EXECUTION_FAILURE);
+
+ if (limit < 0)
+ limit = -limit;
}
else
- limited = limit = 0;
+ limit = -1;
hlist = history_list ();
for (i = 0; hlist[i]; i++)
;
- if (limit < 0)
- limit = -limit;
-
- if ((limited == 0) || ((i -= limit) < 0))
+ if (0 <= limit && limit < i)
+ i -= limit;
+ else
i = 0;
+ histtimefmt = get_string_value ("HISTTIMEFORMAT");
+
while (hlist[i])
{
QUIT;
- printf ("%5d%c %s\n", i + history_base,
+
+ timestr = (histtimefmt && *histtimefmt) ? histtime (hlist[i], histtimefmt) : (char *)NULL;
+ printf ("%5d%c %s%s\n", i + history_base,
histdata(i) ? '*' : ' ',
+ ((timestr && *timestr) ? timestr : ""),
histline(i));
i++;
}
}
-}
-static int
-delete_last_history ()
-{
- register int i;
- HIST_ENTRY **hlist, *histent, *discard;
-
- hlist = history_list ();
- if (hlist == NULL)
- return 0;
-
- for (i = 0; hlist[i]; i++)
- ;
- i--;
-
- /* History_get () takes a parameter that must be offset by history_base. */
- histent = history_get (history_base + i); /* Don't free this */
- if (histent == NULL)
- return 0;
-
- discard = remove_history (i);
- if (discard)
- {
- if (discard->line)
- free (discard->line);
- free ((char *) discard);
- }
- return (1);
+ return (EXECUTION_SUCCESS);
}
/* Remove the last entry in the history list and add each argument in
{
char *s;
- if (hist_last_line_added && delete_last_history () == 0)
- return;
+ /* Delete the last history entry if it was a single entry added to the
+ history list (generally the `history -s' itself), or if `history -s'
+ is being used in a compound command and the compound command was
+ added to the history as a single element (command-oriented history).
+ If you don't want history -s to remove the compound command from the
+ history, change #if 0 to #if 1 below. */
+#if 0
+ if (remember_on_history && hist_last_line_pushed == 0 &&
+ hist_last_line_added && bash_delete_last_history () == 0)
+#else
+ if (remember_on_history && hist_last_line_pushed == 0 &&
+ (hist_last_line_added ||
+ (current_command_line_count > 0 && current_command_first_line_saved && command_oriented_history))
+ && bash_delete_last_history () == 0)
+#endif
+ return;
+
s = string_list (list);
- maybe_add_history (s); /* Obeys HISTCONTROL setting. */
+ /* Call check_add_history with FORCE set to 1 to skip the check against
+ current_command_line_count. If history -s is used in a compound
+ command, the above code will delete the compound command's history
+ entry and this call will add the line to the history as a separate
+ entry. Without FORCE=1, if current_command_line_count were > 1, the
+ line would be appended to the entry before the just-deleted entry. */
+ check_add_history (s, 1); /* obeys HISTCONTROL, HISTIGNORE */
+
+ hist_last_line_pushed = 1; /* XXX */
free (s);
}
char *s;
int r, result;
- if (hist_last_line_added && delete_last_history () == 0)
+ if (hist_last_line_pushed == 0 && hist_last_line_added && bash_delete_last_history () == 0)
return EXECUTION_FAILURE;
result = EXECUTION_SUCCESS;
while (list)
r = history_expand (list->word->word, &s);
if (r < 0)
{
- builtin_error ("%s: history expansion failed", list->word->word);
+ builtin_error (_("%s: history expansion failed"), list->word->word);
result = EXECUTION_FAILURE;
}
else
- {
+ {
fputs (s, stdout);
putchar ('\n');
- }
+ }
FREE (s);
list = list->next;
}
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