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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 14:51:56 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 14:51:56 +0000 |
commit | c77311c90aa045796b3adcd021e69901022f4649 (patch) | |
tree | 3a6c4cc9271c6f7f7c24feff0d1aea286eed0a06 /examples/hist_erasedups.c | |
parent | Initial commit. (diff) | |
download | readline-c77311c90aa045796b3adcd021e69901022f4649.tar.xz readline-c77311c90aa045796b3adcd021e69901022f4649.zip |
Adding upstream version 8.2.upstream/8.2upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'examples/hist_erasedups.c')
-rw-r--r-- | examples/hist_erasedups.c | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/examples/hist_erasedups.c b/examples/hist_erasedups.c new file mode 100644 index 0000000..f820eba --- /dev/null +++ b/examples/hist_erasedups.c @@ -0,0 +1,121 @@ +/* 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; +} |