| /* hist_erasedups -- remove all duplicate entries from history file */ |
| |
| /* Copyright (C) 2011 Free Software Foundation, Inc. |
| |
| This file is part of the GNU Readline Library (Readline), a library for |
| reading lines of text with interactive input and history editing. |
| |
| Readline 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. |
| |
| Readline 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 Readline. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| #ifndef READLINE_LIBRARY |
| #define READLINE_LIBRARY 1 |
| #endif |
| |
| #include <unistd.h> |
| #include <stdlib.h> |
| #include <stdio.h> |
| |
| #ifdef READLINE_LIBRARY |
| # include "history.h" |
| #else |
| # include <readline/history.h> |
| #endif |
| |
| #include <string.h> |
| |
| #define STREQ(a, b) ((a)[0] == (b)[0] && strcmp(a, b) == 0) |
| #define STREQN(a, b, n) ((n == 0) ? (1) \ |
| : ((a)[0] == (b)[0] && strncmp(a, b, n) == 0)) |
| |
| int hist_erasedups (void); |
| |
| static void |
| usage() |
| { |
| fprintf (stderr, "hist_erasedups: usage: hist_erasedups [-t] [filename]\n"); |
| exit (2); |
| } |
| |
| int |
| main (argc, argv) |
| int argc; |
| char **argv; |
| { |
| char *fn; |
| int r; |
| |
| while ((r = getopt (argc, argv, "t")) != -1) |
| { |
| switch (r) |
| { |
| case 't': |
| history_write_timestamps = 1; |
| break; |
| default: |
| usage (); |
| } |
| } |
| argv += optind; |
| argc -= optind; |
| |
| fn = argc ? argv[0] : getenv ("HISTFILE"); |
| if (fn == 0) |
| { |
| fprintf (stderr, "hist_erasedups: no history file\n"); |
| usage (); |
| } |
| |
| if ((r = read_history (fn)) != 0) |
| { |
| fprintf (stderr, "hist_erasedups: read_history: %s: %s\n", fn, strerror (r)); |
| exit (1); |
| } |
| |
| hist_erasedups (); |
| |
| if ((r = write_history (fn)) != 0) |
| { |
| fprintf (stderr, "hist_erasedups: write_history: %s: %s\n", fn, strerror (r)); |
| exit (1); |
| } |
| |
| exit (0); |
| } |
| |
| int |
| hist_erasedups () |
| { |
| int r, n; |
| HIST_ENTRY *h, *temp; |
| |
| using_history (); |
| while (h = previous_history ()) |
| { |
| r = where_history (); |
| for (n = 0; n < r; n++) |
| { |
| temp = history_get (n+history_base); |
| if (STREQ (h->line, temp->line)) |
| { |
| remove_history (n); |
| r--; /* have to get one fewer now */ |
| n--; /* compensate for above increment */ |
| history_offset--; /* moving backwards in history list */ |
| } |
| } |
| } |
| using_history (); |
| |
| return r; |
| } |