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Annotation of embedaddon/tmux/cmd-confirm-before.c, revision 1.1

1.1     ! misho       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 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: }