1 /* $OpenBSD: cmd-confirm-before.c,v 1.37 2019/05/23 11:13:30 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(struct client *, void *, 35 const char *, int); 36 static void cmd_confirm_before_free(void *); 37 38 const struct cmd_entry cmd_confirm_before_entry = { 39 .name = "confirm-before", 40 .alias = "confirm", 41 42 .args = { "p:t:", 1, 1 }, 43 .usage = "[-p prompt] " CMD_TARGET_CLIENT_USAGE " command", 44 45 .flags = 0, 46 .exec = cmd_confirm_before_exec 47 }; 48 49 struct cmd_confirm_before_data { 50 char *cmd; 51 }; 52 53 static enum cmd_retval 54 cmd_confirm_before_exec(struct cmd *self, struct cmdq_item *item) 55 { 56 struct args *args = self->args; 57 struct cmd_confirm_before_data *cdata; 58 struct client *c; 59 char *cmd, *copy, *new_prompt, *ptr; 60 const char *prompt; 61 62 if ((c = cmd_find_client(item, args_get(args, 't'), 0)) == NULL) 63 return (CMD_RETURN_ERROR); 64 65 if ((prompt = args_get(args, 'p')) != NULL) 66 xasprintf(&new_prompt, "%s ", prompt); 67 else { 68 ptr = copy = xstrdup(args->argv[0]); 69 cmd = strsep(&ptr, " \t"); 70 xasprintf(&new_prompt, "Confirm '%s'? (y/n) ", cmd); 71 free(copy); 72 } 73 74 cdata = xmalloc(sizeof *cdata); 75 cdata->cmd = xstrdup(args->argv[0]); 76 77 status_prompt_set(c, new_prompt, NULL, 78 cmd_confirm_before_callback, cmd_confirm_before_free, cdata, 79 PROMPT_SINGLE); 80 81 free(new_prompt); 82 return (CMD_RETURN_NORMAL); 83 } 84 85 static int 86 cmd_confirm_before_callback(struct client *c, void *data, const char *s, 87 __unused int done) 88 { 89 struct cmd_confirm_before_data *cdata = data; 90 struct cmdq_item *new_item; 91 struct cmd_parse_result *pr; 92 93 if (c->flags & CLIENT_DEAD) 94 return (0); 95 96 if (s == NULL || *s == '\0') 97 return (0); 98 if (tolower((u_char)s[0]) != 'y' || s[1] != '\0') 99 return (0); 100 101 pr = cmd_parse_from_string(cdata->cmd, NULL); 102 switch (pr->status) { 103 case CMD_PARSE_EMPTY: 104 new_item = NULL; 105 break; 106 case CMD_PARSE_ERROR: 107 new_item = cmdq_get_error(pr->error); 108 free(pr->error); 109 cmdq_append(c, new_item); 110 break; 111 case CMD_PARSE_SUCCESS: 112 new_item = cmdq_get_command(pr->cmdlist, NULL, NULL, 0); 113 cmd_list_free(pr->cmdlist); 114 cmdq_append(c, new_item); 115 break; 116 } 117 118 return (0); 119 } 120 121 static void 122 cmd_confirm_before_free(void *data) 123 { 124 struct cmd_confirm_before_data *cdata = data; 125 126 free(cdata->cmd); 127 free(cdata); 128 } 129