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Annotation of embedaddon/tmux/cmd-set-hook.c, revision 1.1.1.1

1.1       misho       1: /* $OpenBSD$ */
                      2: 
                      3: /*
                      4:  * Copyright (c) 2012 Thomas Adam <thomas@xteddy.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 <stdlib.h>
                     22: #include <string.h>
                     23: 
                     24: #include "tmux.h"
                     25: 
                     26: /*
                     27:  * Set or show global or session hooks.
                     28:  */
                     29: 
                     30: static enum cmd_retval cmd_set_hook_exec(struct cmd *, struct cmdq_item *);
                     31: 
                     32: const struct cmd_entry cmd_set_hook_entry = {
                     33:        .name = "set-hook",
                     34:        .alias = NULL,
                     35: 
                     36:        .args = { "gt:u", 1, 2 },
                     37:        .usage = "[-gu] " CMD_TARGET_SESSION_USAGE " hook-name [command]",
                     38: 
                     39:        .tflag = CMD_SESSION_CANFAIL,
                     40: 
                     41:        .flags = CMD_AFTERHOOK,
                     42:        .exec = cmd_set_hook_exec
                     43: };
                     44: 
                     45: const struct cmd_entry cmd_show_hooks_entry = {
                     46:        .name = "show-hooks",
                     47:        .alias = NULL,
                     48: 
                     49:        .args = { "gt:", 0, 1 },
                     50:        .usage = "[-g] " CMD_TARGET_SESSION_USAGE,
                     51: 
                     52:        .tflag = CMD_SESSION,
                     53: 
                     54:        .flags = CMD_AFTERHOOK,
                     55:        .exec = cmd_set_hook_exec
                     56: };
                     57: 
                     58: static enum cmd_retval
                     59: cmd_set_hook_exec(struct cmd *self, struct cmdq_item *item)
                     60: {
                     61:        struct args     *args = self->args;
                     62:        struct cmd_list *cmdlist;
                     63:        struct hooks    *hooks;
                     64:        struct hook     *hook;
                     65:        char            *cause, *tmp;
                     66:        const char      *name, *cmd, *target;
                     67: 
                     68:        if (args_has(args, 'g'))
                     69:                hooks = global_hooks;
                     70:        else {
                     71:                if (item->state.tflag.s == NULL) {
                     72:                        target = args_get(args, 't');
                     73:                        if (target != NULL)
                     74:                                cmdq_error(item, "no such session: %s", target);
                     75:                        else
                     76:                                cmdq_error(item, "no current session");
                     77:                        return (CMD_RETURN_ERROR);
                     78:                }
                     79:                hooks = item->state.tflag.s->hooks;
                     80:        }
                     81: 
                     82:        if (self->entry == &cmd_show_hooks_entry) {
                     83:                hook = hooks_first(hooks);
                     84:                while (hook != NULL) {
                     85:                        tmp = cmd_list_print(hook->cmdlist);
                     86:                        cmdq_print(item, "%s -> %s", hook->name, tmp);
                     87:                        free(tmp);
                     88: 
                     89:                        hook = hooks_next(hook);
                     90:                }
                     91:                return (CMD_RETURN_NORMAL);
                     92:        }
                     93: 
                     94:        name = args->argv[0];
                     95:        if (*name == '\0') {
                     96:                cmdq_error(item, "invalid hook name");
                     97:                return (CMD_RETURN_ERROR);
                     98:        }
                     99:        if (args->argc < 2)
                    100:                cmd = NULL;
                    101:        else
                    102:                cmd = args->argv[1];
                    103: 
                    104:        if (args_has(args, 'u')) {
                    105:                if (cmd != NULL) {
                    106:                        cmdq_error(item, "command passed to unset hook: %s",
                    107:                            name);
                    108:                        return (CMD_RETURN_ERROR);
                    109:                }
                    110:                hooks_remove(hooks, name);
                    111:                return (CMD_RETURN_NORMAL);
                    112:        }
                    113: 
                    114:        if (cmd == NULL) {
                    115:                cmdq_error(item, "no command to set hook: %s", name);
                    116:                return (CMD_RETURN_ERROR);
                    117:        }
                    118:        cmdlist = cmd_string_parse(cmd, NULL, 0, &cause);
                    119:        if (cmdlist == NULL) {
                    120:                if (cause != NULL) {
                    121:                        cmdq_error(item, "%s", cause);
                    122:                        free(cause);
                    123:                }
                    124:                return (CMD_RETURN_ERROR);
                    125:        }
                    126:        hooks_add(hooks, name, cmdlist);
                    127:        cmd_list_free(cmdlist);
                    128: 
                    129:        return (CMD_RETURN_NORMAL);
                    130: }