1 /* $OpenBSD: cmd-confirm-before.c,v 1.33 2017/01/15 22:00:56 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 cmd_retval cmd_confirm_before_exec(struct cmd *, 32 struct cmdq_item *); 33 34 static int cmd_confirm_before_callback(void *, const char *, int); 35 static void cmd_confirm_before_free(void *); 36 37 const struct cmd_entry cmd_confirm_before_entry = { 38 .name = "confirm-before", 39 .alias = "confirm", 40 41 .args = { "p:t:", 1, 1 }, 42 .usage = "[-p prompt] " CMD_TARGET_CLIENT_USAGE " command", 43 44 .tflag = CMD_CLIENT, 45 46 .flags = 0, 47 .exec = cmd_confirm_before_exec 48 }; 49 50 struct cmd_confirm_before_data { 51 char *cmd; 52 struct client *client; 53 }; 54 55 static enum cmd_retval 56 cmd_confirm_before_exec(struct cmd *self, struct cmdq_item *item) 57 { 58 struct args *args = self->args; 59 struct cmd_confirm_before_data *cdata; 60 struct client *c = item->state.c; 61 char *cmd, *copy, *new_prompt, *ptr; 62 const char *prompt; 63 64 if ((prompt = args_get(args, 'p')) != NULL) 65 xasprintf(&new_prompt, "%s ", prompt); 66 else { 67 ptr = copy = xstrdup(args->argv[0]); 68 cmd = strsep(&ptr, " \t"); 69 xasprintf(&new_prompt, "Confirm '%s'? (y/n) ", cmd); 70 free(copy); 71 } 72 73 cdata = xmalloc(sizeof *cdata); 74 cdata->cmd = xstrdup(args->argv[0]); 75 76 cdata->client = c; 77 cdata->client->references++; 78 79 status_prompt_set(c, new_prompt, NULL, 80 cmd_confirm_before_callback, cmd_confirm_before_free, cdata, 81 PROMPT_SINGLE); 82 83 free(new_prompt); 84 return (CMD_RETURN_NORMAL); 85 } 86 87 static enum cmd_retval 88 cmd_confirm_before_error(struct cmdq_item *item, void *data) 89 { 90 char *error = data; 91 92 cmdq_error(item, "%s", error); 93 free(error); 94 95 return (CMD_RETURN_NORMAL); 96 } 97 98 static int 99 cmd_confirm_before_callback(void *data, const char *s, __unused int done) 100 { 101 struct cmd_confirm_before_data *cdata = data; 102 struct client *c = cdata->client; 103 struct cmd_list *cmdlist; 104 struct cmdq_item *new_item; 105 char *cause; 106 107 if (c->flags & CLIENT_DEAD) 108 return (0); 109 110 if (s == NULL || *s == '\0') 111 return (0); 112 if (tolower((u_char) s[0]) != 'y' || s[1] != '\0') 113 return (0); 114 115 cmdlist = cmd_string_parse(cdata->cmd, NULL, 0, &cause); 116 if (cmdlist == NULL) { 117 if (cause != NULL) { 118 new_item = cmdq_get_callback(cmd_confirm_before_error, 119 cause); 120 } else 121 new_item = NULL; 122 } else { 123 new_item = cmdq_get_command(cmdlist, NULL, NULL, 0); 124 cmd_list_free(cmdlist); 125 } 126 127 if (new_item != NULL) 128 cmdq_append(c, new_item); 129 130 return (0); 131 } 132 133 static void 134 cmd_confirm_before_free(void *data) 135 { 136 struct cmd_confirm_before_data *cdata = data; 137 struct client *c = cdata->client; 138 139 server_client_unref(c); 140 141 free(cdata->cmd); 142 free(cdata); 143 } 144