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 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 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 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 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