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 = { "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 }