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Annotation of embedaddon/tmux/cmd-confirm-before.c, revision 1.1.1.1

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: }