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Annotation of src/usr.bin/tmux/cmd-set-environment.c, Revision 1.18

1.18    ! nicm        1: /* $OpenBSD: cmd-set-environment.c,v 1.17 2016/01/19 15:59:12 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:
1.8       nicm       30: enum cmd_retval         cmd_set_environment_exec(struct cmd *, struct cmd_q *);
1.1       nicm       31:
                     32: const struct cmd_entry cmd_set_environment_entry = {
1.14      nicm       33:        .name = "set-environment",
                     34:        .alias = "setenv",
                     35:
                     36:        .args = { "grt:u", 1, 2 },
                     37:        .usage = "[-gru] " CMD_TARGET_SESSION_USAGE " name [value]",
                     38:
1.16      nicm       39:        .tflag = CMD_SESSION_CANFAIL,
1.15      nicm       40:
                     41:        .flags = 0,
1.14      nicm       42:        .exec = cmd_set_environment_exec
1.1       nicm       43: };
                     44:
1.6       nicm       45: enum cmd_retval
1.8       nicm       46: cmd_set_environment_exec(struct cmd *self, struct cmd_q *cmdq)
1.1       nicm       47: {
1.4       nicm       48:        struct args     *args = self->args;
                     49:        struct environ  *env;
1.18    ! nicm       50:        const char      *name, *value, *target;
1.1       nicm       51:
1.4       nicm       52:        name = args->argv[0];
                     53:        if (*name == '\0') {
1.8       nicm       54:                cmdq_error(cmdq, "empty variable name");
1.6       nicm       55:                return (CMD_RETURN_ERROR);
1.1       nicm       56:        }
1.4       nicm       57:        if (strchr(name, '=') != NULL) {
1.8       nicm       58:                cmdq_error(cmdq, "variable name contains =");
1.6       nicm       59:                return (CMD_RETURN_ERROR);
1.1       nicm       60:        }
                     61:
1.7       okan       62:        if (args->argc < 2)
1.4       nicm       63:                value = NULL;
                     64:        else
                     65:                value = args->argv[1];
                     66:
1.18    ! nicm       67:        if (args_has(self->args, 'g'))
1.11      nicm       68:                env = global_environ;
1.18    ! nicm       69:        else {
        !            70:                if (cmdq->state.tflag.s == NULL) {
        !            71:                        target = args_get(args, 't');
        !            72:                        if (target != NULL)
        !            73:                                cmdq_error(cmdq, "no such session: %s", target);
        !            74:                        else
        !            75:                                cmdq_error(cmdq, "no current session");
        !            76:                        return (CMD_RETURN_ERROR);
        !            77:                }
1.13      nicm       78:                env = cmdq->state.tflag.s->environ;
1.18    ! nicm       79:        }
1.1       nicm       80:
1.4       nicm       81:        if (args_has(self->args, 'u')) {
                     82:                if (value != NULL) {
1.8       nicm       83:                        cmdq_error(cmdq, "can't specify a value with -u");
1.6       nicm       84:                        return (CMD_RETURN_ERROR);
1.1       nicm       85:                }
1.4       nicm       86:                environ_unset(env, name);
                     87:        } else if (args_has(self->args, 'r')) {
                     88:                if (value != NULL) {
1.8       nicm       89:                        cmdq_error(cmdq, "can't specify a value with -r");
1.6       nicm       90:                        return (CMD_RETURN_ERROR);
1.1       nicm       91:                }
1.12      nicm       92:                environ_clear(env, name);
1.1       nicm       93:        } else {
1.4       nicm       94:                if (value == NULL) {
1.8       nicm       95:                        cmdq_error(cmdq, "no value specified");
1.6       nicm       96:                        return (CMD_RETURN_ERROR);
1.1       nicm       97:                }
1.12      nicm       98:                environ_set(env, name, "%s", value);
1.1       nicm       99:        }
                    100:
1.6       nicm      101:        return (CMD_RETURN_NORMAL);
1.1       nicm      102: }