From 772f20abb0a3a0979c440114bf3a1cff5b3cef03 Mon Sep 17 00:00:00 2001 From: cvpcs Date: Wed, 2 Jun 2010 11:02:31 -0500 Subject: initial import of bash 4.1 --- builtins/history.def | 380 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 380 insertions(+) create mode 100644 builtins/history.def (limited to 'builtins/history.def') diff --git a/builtins/history.def b/builtins/history.def new file mode 100644 index 0000000..e8249e9 --- /dev/null +++ b/builtins/history.def @@ -0,0 +1,380 @@ +This file is history.def, from which is created history.c. +It implements the builtin "history" in Bash. + +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 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. + +You should have received a copy of the GNU General Public License +along with Bash. If not, see . + +$PRODUCES history.c + +$BUILTIN history +$FUNCTION history_builtin +$DEPENDS_ON HISTORY +$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 $HISTTIMEFORMAT variable is set and not null, its value is used +as a format string for strftime(3) to print the time stamp associated +with each displayed history entry. No time stamps are printed otherwise. + +Exit Status: +Returns success unless an invalid option is given or an error occurs. +$END + +#include + +#if defined (HISTORY) +#include "../bashtypes.h" +#if ! defined(_MINIX) && defined (HAVE_SYS_FILE_H) +# include +#endif +#include "posixstat.h" +#include "filecntl.h" +#include +#include +#if defined (HAVE_UNISTD_H) +# include +#endif + +#include "../bashansi.h" +#include "../bashintl.h" + +#include "../shell.h" +#include "../bashhist.h" +#include +#include "bashgetopt.h" +#include "common.h" + +#if !defined (errno) +extern int errno; +#endif + +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 WFLAG 0x04 +#define NFLAG 0x08 +#define SFLAG 0x10 +#define PFLAG 0x20 +#define CFLAG 0x40 +#define DFLAG 0x80 + +int +history_builtin (list) + WORD_LIST *list; +{ + 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, "acd:npsrw")) != -1) + { + switch (opt) + { + case 'a': + flags |= AFLAG; + break; + case 'c': + flags |= CFLAG; + break; + case 'n': + flags |= NFLAG; + break; + case 'r': + flags |= RFLAG; + break; + case 'w': + flags |= WFLAG; + break; + case 's': + flags |= SFLAG; + break; + case 'd': + flags |= DFLAG; + delete_arg = list_optarg; + break; + case 'p': +#if defined (BANG_HISTORY) + flags |= PFLAG; +#endif + break; + default: + builtin_usage (); + return (EX_USAGE); + } + } + list = loptend; + + 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")); + return (EXECUTION_FAILURE); + } + + /* clear the history, but allow other arguments to add to it again. */ + if (flags & CFLAG) + { + bash_clear_history (); + if (list == 0) + return (EXECUTION_SUCCESS); + } + + if (flags & SFLAG) + { + if (list) + push_history (list); + return (EXECUTION_SUCCESS); + } +#if defined (BANG_HISTORY) + else if (flags & PFLAG) + { + if (list) + 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) + { + result = display_history (list); + return (sh_chkwrite (result)); + } + + filename = list ? list->word->word : get_string_value ("HISTFILE"); + result = EXECUTION_SUCCESS; + + if (flags & AFLAG) /* Append session's history to file. */ + result = maybe_append_history (filename); + else if (flags & WFLAG) /* Write entire history. */ + result = write_history (filename); + else if (flags & RFLAG) /* Read entire file. */ + result = read_history (filename); + 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); +} + +/* Accessors for HIST_ENTRY lists that are called HLIST. */ +#define histline(i) (hlist[(i)]->line) +#define histdata(i) (hlist[(i)]->data) + +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; + intmax_t limit; + HIST_ENTRY **hlist; + char *histtimefmt, *timestr; + + if (list) + { + if (get_numeric_arg (list, 0, &limit) == 0) + return (EXECUTION_FAILURE); + + if (limit < 0) + limit = -limit; + } + else + limit = -1; + + hlist = history_list (); + + if (hlist) + { + for (i = 0; hlist[i]; i++) + ; + + if (0 <= limit && limit < i) + i -= limit; + else + i = 0; + + histtimefmt = get_string_value ("HISTTIMEFORMAT"); + + while (hlist[i]) + { + QUIT; + + 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++; + } + } + + return (EXECUTION_SUCCESS); +} + +/* Remove the last entry in the history list and add each argument in + LIST to the history. */ +static void +push_history (list) + WORD_LIST *list; +{ + char *s; + + /* 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 (hist_last_line_pushed == 0 && hist_last_line_added && bash_delete_last_history () == 0) +#else + if (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); + /* 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); +} + +#if defined (BANG_HISTORY) +static int +expand_and_print_history (list) + WORD_LIST *list; +{ + char *s; + int r, result; + + 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); + result = EXECUTION_FAILURE; + } + else + { + fputs (s, stdout); + putchar ('\n'); + } + FREE (s); + list = list->next; + } + fflush (stdout); + return result; +} +#endif /* BANG_HISTORY */ +#endif /* HISTORY */ -- cgit v1.1