1 /* $OpenBSD: cmd-confirm-before.c,v 1.56 2024/11/26 15:51:48 nicm Exp $ */
2
3 /*
4 * Copyright (c) 2009 Tiago Cunha <me@tiagocunha.org>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #include <sys/types.h>
20
21 #include <ctype.h>
22 #include <stdlib.h>
23 #include <string.h>
24
25 #include "tmux.h"
26
27 /*
28 * Asks for confirmation before executing a command.
29 */
30
31 static enum args_parse_type cmd_confirm_before_args_parse(struct args *,
32 u_int, char **);
33 static enum cmd_retval cmd_confirm_before_exec(struct cmd *,
34 struct cmdq_item *);
35
36 static int cmd_confirm_before_callback(struct client *, void *,
37 const char *, int);
38 static void cmd_confirm_before_free(void *);
39
40 const struct cmd_entry cmd_confirm_before_entry = {
41 .name = "confirm-before",
42 .alias = "confirm",
43
44 .args = { "bc:p:t:y", 1, 1, cmd_confirm_before_args_parse },
45 .usage = "[-by] [-c confirm_key] [-p prompt] " CMD_TARGET_CLIENT_USAGE
46 " command",
47
48 .flags = CMD_CLIENT_TFLAG,
49 .exec = cmd_confirm_before_exec
50 };
51
52 struct cmd_confirm_before_data {
53 struct cmdq_item *item;
54 struct cmd_list *cmdlist;
55 u_char confirm_key;
56 int default_yes;
57 };
58
59 static enum args_parse_type
cmd_confirm_before_args_parse(__unused struct args * args,__unused u_int idx,__unused char ** cause)60 cmd_confirm_before_args_parse(__unused struct args *args, __unused u_int idx,
61 __unused char **cause)
62 {
63 return (ARGS_PARSE_COMMANDS_OR_STRING);
64 }
65
66 static enum cmd_retval
cmd_confirm_before_exec(struct cmd * self,struct cmdq_item * item)67 cmd_confirm_before_exec(struct cmd *self, struct cmdq_item *item)
68 {
69 struct args *args = cmd_get_args(self);
70 struct cmd_confirm_before_data *cdata;
71 struct client *tc = cmdq_get_target_client(item);
72 struct cmd_find_state *target = cmdq_get_target(item);
73 char *new_prompt;
74 const char *confirm_key, *prompt, *cmd;
75 int wait = !args_has(args, 'b');
76
77 cdata = xcalloc(1, sizeof *cdata);
78 cdata->cmdlist = args_make_commands_now(self, item, 0, 1);
79 if (cdata->cmdlist == NULL) {
80 free(cdata);
81 return (CMD_RETURN_ERROR);
82 }
83
84 if (wait)
85 cdata->item = item;
86
87 cdata->default_yes = args_has(args, 'y');
88 if ((confirm_key = args_get(args, 'c')) != NULL) {
89 if (confirm_key[1] == '\0' &&
90 confirm_key[0] > 31 &&
91 confirm_key[0] < 127)
92 cdata->confirm_key = confirm_key[0];
93 else {
94 cmdq_error(item, "invalid confirm key");
95 free(cdata);
96 return (CMD_RETURN_ERROR);
97 }
98 }
99 else
100 cdata->confirm_key = 'y';
101
102 if ((prompt = args_get(args, 'p')) != NULL)
103 xasprintf(&new_prompt, "%s ", prompt);
104 else {
105 cmd = cmd_get_entry(cmd_list_first(cdata->cmdlist))->name;
106 xasprintf(&new_prompt, "Confirm '%s'? (%c/n) ", cmd,
107 cdata->confirm_key);
108 }
109
110 status_prompt_set(tc, target, new_prompt, NULL,
111 cmd_confirm_before_callback, cmd_confirm_before_free, cdata,
112 PROMPT_SINGLE, PROMPT_TYPE_COMMAND);
113 free(new_prompt);
114
115 if (!wait)
116 return (CMD_RETURN_NORMAL);
117 return (CMD_RETURN_WAIT);
118 }
119
120 static int
cmd_confirm_before_callback(struct client * c,void * data,const char * s,__unused int done)121 cmd_confirm_before_callback(struct client *c, void *data, const char *s,
122 __unused int done)
123 {
124 struct cmd_confirm_before_data *cdata = data;
125 struct cmdq_item *item = cdata->item, *new_item;
126 int retcode = 1;
127
128 if (c->flags & CLIENT_DEAD)
129 goto out;
130
131 if (s == NULL)
132 goto out;
133 if (s[0] != cdata->confirm_key && (s[0] != '\r' || !cdata->default_yes))
134 goto out;
135 retcode = 0;
136
137 if (item == NULL) {
138 new_item = cmdq_get_command(cdata->cmdlist, NULL);
139 cmdq_append(c, new_item);
140 } else {
141 new_item = cmdq_get_command(cdata->cmdlist,
142 cmdq_get_state(item));
143 cmdq_insert_after(item, new_item);
144 }
145
146 out:
147 if (item != NULL) {
148 if (cmdq_get_client(item) != NULL &&
149 cmdq_get_client(item)->session == NULL)
150 cmdq_get_client(item)->retval = retcode;
151 cmdq_continue(item);
152 }
153 return (0);
154 }
155
156 static void
cmd_confirm_before_free(void * data)157 cmd_confirm_before_free(void *data)
158 {
159 struct cmd_confirm_before_data *cdata = data;
160
161 cmd_list_free(cdata->cmdlist);
162 free(cdata);
163 }
164