1 /* $OpenBSD: cmd-confirm-before.c,v 1.53 2023/04/28 06:12:27 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 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 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 return (CMD_RETURN_ERROR); 81 82 if (wait) 83 cdata->item = item; 84 85 cdata->default_yes = args_has(args, 'y'); 86 if ((confirm_key = args_get(args, 'c')) != NULL) { 87 if (confirm_key[1] == '\0' && 88 confirm_key[0] > 31 && 89 confirm_key[0] < 127) 90 cdata->confirm_key = confirm_key[0]; 91 else { 92 cmdq_error(item, "invalid confirm key"); 93 return (CMD_RETURN_ERROR); 94 } 95 } 96 else 97 cdata->confirm_key = 'y'; 98 99 if ((prompt = args_get(args, 'p')) != NULL) 100 xasprintf(&new_prompt, "%s ", prompt); 101 else { 102 cmd = cmd_get_entry(cmd_list_first(cdata->cmdlist))->name; 103 xasprintf(&new_prompt, "Confirm '%s'? (%c/n) ", 104 cmd, cdata->confirm_key); 105 } 106 107 status_prompt_set(tc, target, new_prompt, NULL, 108 cmd_confirm_before_callback, cmd_confirm_before_free, cdata, 109 PROMPT_SINGLE, PROMPT_TYPE_COMMAND); 110 free(new_prompt); 111 112 if (!wait) 113 return (CMD_RETURN_NORMAL); 114 return (CMD_RETURN_WAIT); 115 } 116 117 static int 118 cmd_confirm_before_callback(struct client *c, void *data, const char *s, 119 __unused int done) 120 { 121 struct cmd_confirm_before_data *cdata = data; 122 struct cmdq_item *item = cdata->item, *new_item; 123 int retcode = 1; 124 125 if (c->flags & CLIENT_DEAD) 126 goto out; 127 128 if (s == NULL) 129 goto out; 130 if (s[0] != cdata->confirm_key && (s[0] != '\0' || !cdata->default_yes)) 131 goto out; 132 retcode = 0; 133 134 if (item == NULL) { 135 new_item = cmdq_get_command(cdata->cmdlist, NULL); 136 cmdq_append(c, new_item); 137 } else { 138 new_item = cmdq_get_command(cdata->cmdlist, 139 cmdq_get_state(item)); 140 cmdq_insert_after(item, new_item); 141 } 142 143 out: 144 if (item != NULL) { 145 if (cmdq_get_client(item) != NULL && 146 cmdq_get_client(item)->session == NULL) 147 cmdq_get_client(item)->retval = retcode; 148 cmdq_continue(item); 149 } 150 return (0); 151 } 152 153 static void 154 cmd_confirm_before_free(void *data) 155 { 156 struct cmd_confirm_before_data *cdata = data; 157 158 cmd_list_free(cdata->cmdlist); 159 free(cdata); 160 } 161