cmd-confirm-before.c

   1 /* $OpenBSD$ */
   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] != '\0' || !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 }