1 /* $OpenBSD: cmd-confirm-before.c,v 1.52 2021/10/28 18:39:15 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 = { "bp:t:", 1, 1, cmd_confirm_before_args_parse }, 45 .usage = "[-b] [-p prompt] " CMD_TARGET_CLIENT_USAGE " command", 46 47 .flags = CMD_CLIENT_TFLAG, 48 .exec = cmd_confirm_before_exec 49 }; 50 51 struct cmd_confirm_before_data { 52 struct cmdq_item *item; 53 struct cmd_list *cmdlist; 54 }; 55 56 static enum args_parse_type 57 cmd_confirm_before_args_parse(__unused struct args *args, __unused u_int idx, 58 __unused char **cause) 59 { 60 return (ARGS_PARSE_COMMANDS_OR_STRING); 61 } 62 63 static enum cmd_retval 64 cmd_confirm_before_exec(struct cmd *self, struct cmdq_item *item) 65 { 66 struct args *args = cmd_get_args(self); 67 struct cmd_confirm_before_data *cdata; 68 struct client *tc = cmdq_get_target_client(item); 69 struct cmd_find_state *target = cmdq_get_target(item); 70 char *new_prompt; 71 const char *prompt, *cmd; 72 int wait = !args_has(args, 'b'); 73 74 cdata = xcalloc(1, sizeof *cdata); 75 cdata->cmdlist = args_make_commands_now(self, item, 0, 1); 76 if (cdata->cmdlist == NULL) 77 return (CMD_RETURN_ERROR); 78 79 if (wait) 80 cdata->item = item; 81 82 if ((prompt = args_get(args, 'p')) != NULL) 83 xasprintf(&new_prompt, "%s ", prompt); 84 else { 85 cmd = cmd_get_entry(cmd_list_first(cdata->cmdlist))->name; 86 xasprintf(&new_prompt, "Confirm '%s'? (y/n) ", cmd); 87 } 88 89 status_prompt_set(tc, target, new_prompt, NULL, 90 cmd_confirm_before_callback, cmd_confirm_before_free, cdata, 91 PROMPT_SINGLE, PROMPT_TYPE_COMMAND); 92 free(new_prompt); 93 94 if (!wait) 95 return (CMD_RETURN_NORMAL); 96 return (CMD_RETURN_WAIT); 97 } 98 99 static int 100 cmd_confirm_before_callback(struct client *c, void *data, const char *s, 101 __unused int done) 102 { 103 struct cmd_confirm_before_data *cdata = data; 104 struct cmdq_item *item = cdata->item, *new_item; 105 int retcode = 1; 106 107 if (c->flags & CLIENT_DEAD) 108 goto out; 109 110 if (s == NULL || *s == '\0') 111 goto out; 112 if (tolower((u_char)s[0]) != 'y' || s[1] != '\0') 113 goto out; 114 retcode = 0; 115 116 if (item == NULL) { 117 new_item = cmdq_get_command(cdata->cmdlist, NULL); 118 cmdq_append(c, new_item); 119 } else { 120 new_item = cmdq_get_command(cdata->cmdlist, 121 cmdq_get_state(item)); 122 cmdq_insert_after(item, new_item); 123 } 124 125 out: 126 if (item != NULL) { 127 if (cmdq_get_client(item) != NULL && 128 cmdq_get_client(item)->session == NULL) 129 cmdq_get_client(item)->retval = retcode; 130 cmdq_continue(item); 131 } 132 return (0); 133 } 134 135 static void 136 cmd_confirm_before_free(void *data) 137 { 138 struct cmd_confirm_before_data *cdata = data; 139 140 cmd_list_free(cdata->cmdlist); 141 free(cdata); 142 } 143