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Annotation of src/usr.bin/tmux/cmd-set-environment.c, Revision 1.24

1.24    ! nicm        1: /* $OpenBSD: cmd-set-environment.c,v 1.23 2020/03/31 17:14:40 nicm Exp $ */
1.1       nicm        2:
                      3: /*
1.17      nicm        4:  * Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
1.1       nicm        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:
1.21      nicm       30: static enum cmd_retval cmd_set_environment_exec(struct cmd *,
                     31:                            struct cmdq_item *);
1.1       nicm       32:
                     33: const struct cmd_entry cmd_set_environment_entry = {
1.14      nicm       34:        .name = "set-environment",
                     35:        .alias = "setenv",
                     36:
1.23      nicm       37:        .args = { "hgrt:u", 1, 2 },
                     38:        .usage = "[-hgru] " CMD_TARGET_SESSION_USAGE " name [value]",
1.14      nicm       39:
1.22      nicm       40:        .target = { 't', CMD_FIND_SESSION, CMD_FIND_CANFAIL },
1.15      nicm       41:
1.20      nicm       42:        .flags = CMD_AFTERHOOK,
1.14      nicm       43:        .exec = cmd_set_environment_exec
1.1       nicm       44: };
                     45:
1.19      nicm       46: static enum cmd_retval
1.21      nicm       47: cmd_set_environment_exec(struct cmd *self, struct cmdq_item *item)
1.1       nicm       48: {
1.24    ! nicm       49:        struct args     *args = cmd_get_args(self);
1.4       nicm       50:        struct environ  *env;
1.18      nicm       51:        const char      *name, *value, *target;
1.1       nicm       52:
1.4       nicm       53:        name = args->argv[0];
                     54:        if (*name == '\0') {
1.21      nicm       55:                cmdq_error(item, "empty variable name");
1.6       nicm       56:                return (CMD_RETURN_ERROR);
1.1       nicm       57:        }
1.4       nicm       58:        if (strchr(name, '=') != NULL) {
1.21      nicm       59:                cmdq_error(item, "variable name contains =");
1.6       nicm       60:                return (CMD_RETURN_ERROR);
1.1       nicm       61:        }
                     62:
1.7       okan       63:        if (args->argc < 2)
1.4       nicm       64:                value = NULL;
                     65:        else
                     66:                value = args->argv[1];
                     67:
1.24    ! nicm       68:        if (args_has(args, 'g'))
1.11      nicm       69:                env = global_environ;
1.18      nicm       70:        else {
1.22      nicm       71:                if (item->target.s == NULL) {
1.18      nicm       72:                        target = args_get(args, 't');
                     73:                        if (target != NULL)
1.21      nicm       74:                                cmdq_error(item, "no such session: %s", target);
1.18      nicm       75:                        else
1.21      nicm       76:                                cmdq_error(item, "no current session");
1.18      nicm       77:                        return (CMD_RETURN_ERROR);
                     78:                }
1.22      nicm       79:                env = item->target.s->environ;
1.18      nicm       80:        }
1.1       nicm       81:
1.24    ! nicm       82:        if (args_has(args, 'u')) {
1.4       nicm       83:                if (value != NULL) {
1.21      nicm       84:                        cmdq_error(item, "can't specify a value with -u");
1.6       nicm       85:                        return (CMD_RETURN_ERROR);
1.1       nicm       86:                }
1.4       nicm       87:                environ_unset(env, name);
1.24    ! nicm       88:        } else if (args_has(args, 'r')) {
1.4       nicm       89:                if (value != NULL) {
1.21      nicm       90:                        cmdq_error(item, "can't specify a value with -r");
1.6       nicm       91:                        return (CMD_RETURN_ERROR);
1.1       nicm       92:                }
1.12      nicm       93:                environ_clear(env, name);
1.1       nicm       94:        } else {
1.4       nicm       95:                if (value == NULL) {
1.21      nicm       96:                        cmdq_error(item, "no value specified");
1.6       nicm       97:                        return (CMD_RETURN_ERROR);
1.1       nicm       98:                }
1.23      nicm       99:                if (args_has(args, 'h'))
                    100:                        environ_set(env, name, ENVIRON_HIDDEN, "%s", value);
                    101:                else
                    102:                        environ_set(env, name, 0, "%s", value);
1.1       nicm      103:        }
                    104:
1.6       nicm      105:        return (CMD_RETURN_NORMAL);
1.1       nicm      106: }