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Annotation of src/usr.bin/tmux/cmd-set-environment.c, Revision 1.27

1.27    ! nicm        1: /* $OpenBSD: cmd-set-environment.c,v 1.26 2020/09/01 09:19:01 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:
1.26      nicm       37:        .args = { "Fhgrt:u", 1, 2 },
                     38:        .usage = "[-Fhgru] " 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: {
1.25      nicm       49:        struct args             *args = cmd_get_args(self);
                     50:        struct cmd_find_state   *target = cmdq_get_target(item);
                     51:        struct environ          *env;
1.27    ! nicm       52:        const char              *name = args_string(args, 0), *value;
        !            53:        const char              *tflag;
        !            54:        char                    *expanded = NULL;
1.26      nicm       55:        enum cmd_retval          retval = CMD_RETURN_NORMAL;
1.1       nicm       56:
1.4       nicm       57:        if (*name == '\0') {
1.21      nicm       58:                cmdq_error(item, "empty variable name");
1.6       nicm       59:                return (CMD_RETURN_ERROR);
1.1       nicm       60:        }
1.4       nicm       61:        if (strchr(name, '=') != NULL) {
1.21      nicm       62:                cmdq_error(item, "variable name contains =");
1.6       nicm       63:                return (CMD_RETURN_ERROR);
1.1       nicm       64:        }
                     65:
1.27    ! nicm       66:        if (args_count(args) < 2)
1.4       nicm       67:                value = NULL;
                     68:        else
1.27    ! nicm       69:                value = args_string(args, 1);
        !            70:        if (value != NULL && args_has(args, 'F')) {
        !            71:                expanded = format_single_from_target(item, value);
        !            72:                value = expanded;
        !            73:        }
1.24      nicm       74:        if (args_has(args, 'g'))
1.11      nicm       75:                env = global_environ;
1.18      nicm       76:        else {
1.25      nicm       77:                if (target->s == NULL) {
                     78:                        tflag = args_get(args, 't');
                     79:                        if (tflag != NULL)
                     80:                                cmdq_error(item, "no such session: %s", tflag);
1.18      nicm       81:                        else
1.21      nicm       82:                                cmdq_error(item, "no current session");
1.26      nicm       83:                        retval = CMD_RETURN_ERROR;
                     84:                        goto out;
1.18      nicm       85:                }
1.25      nicm       86:                env = target->s->environ;
1.18      nicm       87:        }
1.1       nicm       88:
1.24      nicm       89:        if (args_has(args, 'u')) {
1.4       nicm       90:                if (value != NULL) {
1.21      nicm       91:                        cmdq_error(item, "can't specify a value with -u");
1.26      nicm       92:                        retval = CMD_RETURN_ERROR;
                     93:                        goto out;
1.1       nicm       94:                }
1.4       nicm       95:                environ_unset(env, name);
1.24      nicm       96:        } else if (args_has(args, 'r')) {
1.4       nicm       97:                if (value != NULL) {
1.21      nicm       98:                        cmdq_error(item, "can't specify a value with -r");
1.26      nicm       99:                        retval = CMD_RETURN_ERROR;
                    100:                        goto out;
1.1       nicm      101:                }
1.12      nicm      102:                environ_clear(env, name);
1.1       nicm      103:        } else {
1.4       nicm      104:                if (value == NULL) {
1.21      nicm      105:                        cmdq_error(item, "no value specified");
1.26      nicm      106:                        retval = CMD_RETURN_ERROR;
                    107:                        goto out;
1.1       nicm      108:                }
1.26      nicm      109:
1.23      nicm      110:                if (args_has(args, 'h'))
                    111:                        environ_set(env, name, ENVIRON_HIDDEN, "%s", value);
                    112:                else
                    113:                        environ_set(env, name, 0, "%s", value);
1.1       nicm      114:        }
                    115:
1.26      nicm      116: out:
1.27    ! nicm      117:        free(expanded);
1.26      nicm      118:        return (retval);
1.1       nicm      119: }