Commit | Line | Data |
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775e241e TT |
1 | /* hist_purgecmd -- remove all instances of command or pattern from history |
2 | file */ | |
3 | ||
4 | /* Copyright (C) 2011 Free Software Foundation, Inc. | |
5 | ||
6 | This file is part of the GNU Readline Library (Readline), a library for | |
7 | reading lines of text with interactive input and history editing. | |
8 | ||
9 | Readline is free software: you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation, either version 3 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | Readline is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with Readline. If not, see <http://www.gnu.org/licenses/>. | |
21 | */ | |
22 | #ifndef READLINE_LIBRARY | |
23 | #define READLINE_LIBRARY 1 | |
24 | #endif | |
25 | ||
26 | #include <unistd.h> | |
27 | #include <stdlib.h> | |
28 | #include <stdio.h> | |
29 | ||
30 | #include <regex.h> | |
31 | ||
32 | #ifdef READLINE_LIBRARY | |
33 | # include "history.h" | |
34 | #else | |
35 | # include <readline/history.h> | |
36 | #endif | |
37 | ||
38 | #include <string.h> | |
39 | ||
40 | #define STREQ(a, b) ((a)[0] == (b)[0] && strcmp(a, b) == 0) | |
41 | #define STREQN(a, b, n) ((n == 0) ? (1) \ | |
42 | : ((a)[0] == (b)[0] && strncmp(a, b, n) == 0)) | |
43 | ||
44 | #define PURGE_REGEXP 0x01 | |
45 | ||
cb41b9e7 TT |
46 | int hist_purgecmd (char *, int); |
47 | ||
775e241e TT |
48 | static void |
49 | usage() | |
50 | { | |
51 | fprintf (stderr, "hist_purgecmd: usage: hist_purgecmd [-r] [-t] [-f filename] command-spec\n"); | |
52 | exit (2); | |
53 | } | |
54 | ||
55 | int | |
56 | main (argc, argv) | |
57 | int argc; | |
58 | char **argv; | |
59 | { | |
60 | char *fn; | |
61 | int r, flags; | |
62 | ||
63 | flags = 0; | |
64 | fn = 0; | |
65 | while ((r = getopt (argc, argv, "f:rt")) != -1) | |
66 | { | |
67 | switch (r) | |
68 | { | |
69 | case 'f': | |
70 | fn = optarg; | |
71 | break; | |
72 | case 'r': | |
73 | flags |= PURGE_REGEXP; | |
74 | break; | |
75 | case 't': | |
76 | history_write_timestamps = 1; | |
77 | break; | |
78 | default: | |
79 | usage (); | |
80 | } | |
81 | } | |
82 | argv += optind; | |
83 | argc -= optind; | |
84 | ||
85 | if (fn == 0) | |
86 | fn = getenv ("HISTFILE"); | |
87 | if (fn == 0) | |
88 | { | |
89 | fprintf (stderr, "hist_purgecmd: no history file\n"); | |
90 | usage (); | |
91 | } | |
92 | ||
93 | if ((r = read_history (fn)) != 0) | |
94 | { | |
95 | fprintf (stderr, "hist_purgecmd: read_history: %s: %s\n", fn, strerror (r)); | |
96 | exit (1); | |
97 | } | |
98 | ||
99 | for (r = 0; r < argc; r++) | |
100 | hist_purgecmd (argv[r], flags); | |
101 | ||
102 | if ((r = write_history (fn)) != 0) | |
103 | { | |
104 | fprintf (stderr, "hist_purgecmd: write_history: %s: %s\n", fn, strerror (r)); | |
105 | exit (1); | |
106 | } | |
107 | ||
108 | exit (0); | |
109 | } | |
110 | ||
111 | int | |
112 | hist_purgecmd (cmd, flags) | |
113 | char *cmd; | |
114 | int flags; | |
115 | { | |
116 | int r, n, rflags; | |
117 | HIST_ENTRY *temp; | |
118 | regex_t regex = { 0 }; | |
119 | ||
120 | if (flags & PURGE_REGEXP) | |
121 | { | |
122 | rflags = REG_EXTENDED|REG_NOSUB; | |
123 | if (regcomp (®ex, cmd, rflags)) | |
124 | { | |
125 | fprintf (stderr, "hist_purgecmd: %s: invalid regular expression\n", cmd); | |
126 | return -1; | |
127 | } | |
128 | } | |
129 | ||
130 | r = 0; | |
131 | using_history (); | |
132 | r = where_history (); | |
133 | for (n = 0; n < r; n++) | |
134 | { | |
135 | temp = history_get (n+history_base); | |
136 | if (((flags & PURGE_REGEXP) && (regexec (®ex, temp->line, 0, 0, 0) == 0)) || | |
137 | ((flags & PURGE_REGEXP) == 0 && STREQ (temp->line, cmd))) | |
138 | { | |
139 | remove_history (n); | |
140 | r--; /* have to get one fewer now */ | |
141 | n--; /* compensate for above increment */ | |
142 | history_offset--; /* moving backwards in history list */ | |
143 | } | |
144 | } | |
145 | using_history (); | |
146 | ||
147 | if (flags & PURGE_REGEXP) | |
148 | regfree (®ex); | |
149 | ||
150 | return r; | |
151 | } |