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

1.1       misho       1: /* $OpenBSD$ */
                      2: 
                      3: /*
                      4:  * Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
                      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 an environment variable.
                     28:  */
                     29: 
                     30: static enum cmd_retval cmd_set_environment_exec(struct cmd *,
                     31:                            struct cmdq_item *);
                     32: 
                     33: const struct cmd_entry cmd_set_environment_entry = {
                     34:        .name = "set-environment",
                     35:        .alias = "setenv",
                     36: 
                     37:        .args = { "grt:u", 1, 2 },
                     38:        .usage = "[-gru] " CMD_TARGET_SESSION_USAGE " name [value]",
                     39: 
                     40:        .tflag = CMD_SESSION_CANFAIL,
                     41: 
                     42:        .flags = CMD_AFTERHOOK,
                     43:        .exec = cmd_set_environment_exec
                     44: };
                     45: 
                     46: static enum cmd_retval
                     47: cmd_set_environment_exec(struct cmd *self, struct cmdq_item *item)
                     48: {
                     49:        struct args     *args = self->args;
                     50:        struct environ  *env;
                     51:        const char      *name, *value, *target;
                     52: 
                     53:        name = args->argv[0];
                     54:        if (*name == '\0') {
                     55:                cmdq_error(item, "empty variable name");
                     56:                return (CMD_RETURN_ERROR);
                     57:        }
                     58:        if (strchr(name, '=') != NULL) {
                     59:                cmdq_error(item, "variable name contains =");
                     60:                return (CMD_RETURN_ERROR);
                     61:        }
                     62: 
                     63:        if (args->argc < 2)
                     64:                value = NULL;
                     65:        else
                     66:                value = args->argv[1];
                     67: 
                     68:        if (args_has(self->args, 'g'))
                     69:                env = global_environ;
                     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:                env = item->state.tflag.s->environ;
                     80:        }
                     81: 
                     82:        if (args_has(self->args, 'u')) {
                     83:                if (value != NULL) {
                     84:                        cmdq_error(item, "can't specify a value with -u");
                     85:                        return (CMD_RETURN_ERROR);
                     86:                }
                     87:                environ_unset(env, name);
                     88:        } else if (args_has(self->args, 'r')) {
                     89:                if (value != NULL) {
                     90:                        cmdq_error(item, "can't specify a value with -r");
                     91:                        return (CMD_RETURN_ERROR);
                     92:                }
                     93:                environ_clear(env, name);
                     94:        } else {
                     95:                if (value == NULL) {
                     96:                        cmdq_error(item, "no value specified");
                     97:                        return (CMD_RETURN_ERROR);
                     98:                }
                     99:                environ_set(env, name, "%s", value);
                    100:        }
                    101: 
                    102:        return (CMD_RETURN_NORMAL);
                    103: }