1 /* $OpenBSD: cmd-confirm-before.c,v 1.44 2021/08/11 08:40:58 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 = { "bp:t:", 1, 1 }, 43 .usage = "[-b] [-p prompt] " CMD_TARGET_CLIENT_USAGE " command", 44 45 .flags = CMD_CLIENT_TFLAG, 46 .exec = cmd_confirm_before_exec 47 }; 48 49 struct cmd_confirm_before_data { 50 char *cmd; 51 struct cmdq_item *item; 52 struct cmd_parse_input pi; 53 }; 54 55 static enum cmd_retval 56 cmd_confirm_before_exec(struct cmd *self, struct cmdq_item *item) 57 { 58 struct args *args = cmd_get_args(self); 59 struct cmd_confirm_before_data *cdata; 60 struct client *tc = cmdq_get_target_client(item); 61 struct cmd_find_state *target = cmdq_get_target(item); 62 char *cmd, *copy, *new_prompt, *ptr; 63 const char *prompt; 64 int wait = !args_has(args, 'b'); 65 66 if ((prompt = args_get(args, 'p')) != NULL) 67 xasprintf(&new_prompt, "%s ", prompt); 68 else { 69 ptr = copy = xstrdup(args->argv[0]); 70 cmd = strsep(&ptr, " \t"); 71 xasprintf(&new_prompt, "Confirm '%s'? (y/n) ", cmd); 72 free(copy); 73 } 74 75 cdata = xmalloc(sizeof *cdata); 76 cdata->cmd = xstrdup(args->argv[0]); 77 78 memset(&cdata->pi, 0, sizeof cdata->pi); 79 cmd_get_source(self, &cdata->pi.file, &cdata->pi.line); 80 if (wait) 81 cdata->pi.item = item; 82 cdata->pi.c = tc; 83 cmd_find_copy_state(&cdata->pi.fs, target); 84 85 if (wait) 86 cdata->item = item; 87 88 status_prompt_set(tc, target, new_prompt, NULL, 89 cmd_confirm_before_callback, cmd_confirm_before_free, cdata, 90 PROMPT_SINGLE, PROMPT_TYPE_COMMAND); 91 92 free(new_prompt); 93 if (!wait) 94 return (CMD_RETURN_NORMAL); 95 return (CMD_RETURN_WAIT); 96 } 97 98 static int 99 cmd_confirm_before_callback(struct client *c, void *data, const char *s, 100 __unused int done) 101 { 102 struct cmd_confirm_before_data *cdata = data; 103 const char *cmd = cdata->cmd; 104 char *error; 105 struct cmdq_item *item = cdata->item; 106 enum cmd_parse_status status; 107 108 if (c->flags & CLIENT_DEAD) 109 return (0); 110 111 if (s == NULL || *s == '\0') 112 goto out; 113 if (tolower((u_char)s[0]) != 'y' || s[1] != '\0') 114 goto out; 115 116 if (item != NULL) { 117 status = cmd_parse_and_insert(cmd, &cdata->pi, item, 118 cmdq_get_state(item), &error); 119 } else 120 status = cmd_parse_and_append(cmd, &cdata->pi, c, NULL, &error); 121 if (status == CMD_PARSE_ERROR) { 122 cmdq_append(c, cmdq_get_error(error)); 123 free(error); 124 } 125 126 out: 127 if (item != NULL) 128 cmdq_continue(item); 129 return (0); 130 } 131 132 static void 133 cmd_confirm_before_free(void *data) 134 { 135 struct cmd_confirm_before_data *cdata = data; 136 137 free(cdata->cmd); 138 free(cdata); 139 } 140