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Annotation of src/usr.bin/tmux/cmd-set-environment.c, Revision 1.1

1.1     ! nicm        1: /* $OpenBSD$ */
        !             2:
        !             3: /*
        !             4:  * Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net>
        !             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: int    cmd_set_environment_exec(struct cmd *, struct cmd_ctx *);
        !            31:
        !            32: const struct cmd_entry cmd_set_environment_entry = {
        !            33:        "set-environment", "setenv",
        !            34:        "[-gru] " CMD_OPTION_SESSION_USAGE,
        !            35:        0, CMD_CHFLAG('g')|CMD_CHFLAG('r')|CMD_CHFLAG('u'),
        !            36:        NULL,
        !            37:        cmd_option_parse,
        !            38:        cmd_set_environment_exec,
        !            39:        cmd_option_free,
        !            40:        cmd_option_print
        !            41: };
        !            42:
        !            43: int
        !            44: cmd_set_environment_exec(struct cmd *self, struct cmd_ctx *ctx)
        !            45: {
        !            46:        struct cmd_option_data  *data = self->data;
        !            47:        struct session          *s;
        !            48:        struct environ          *env;
        !            49:
        !            50:        if (*data->option == '\0') {
        !            51:                ctx->error(ctx, "empty variable name");
        !            52:                return (-1);
        !            53:        }
        !            54:        if (strchr(data->option, '=') != NULL) {
        !            55:                ctx->error(ctx, "variable name contains =");
        !            56:                return (-1);
        !            57:        }
        !            58:
        !            59:        if (data->chflags & CMD_CHFLAG('g'))
        !            60:                env = &global_environ;
        !            61:        else {
        !            62:                if ((s = cmd_find_session(ctx, data->target)) == NULL)
        !            63:                        return (-1);
        !            64:                env = &s->environ;
        !            65:        }
        !            66:
        !            67:        if (data->chflags & CMD_CHFLAG('u')) {
        !            68:                if (data->value != NULL) {
        !            69:                        ctx->error(ctx, "can't specify a value with -u");
        !            70:                        return (-1);
        !            71:                }
        !            72:                environ_unset(env, data->option);
        !            73:        } else if (data->chflags & CMD_CHFLAG('r')) {
        !            74:                if (data->value != NULL) {
        !            75:                        ctx->error(ctx, "can't specify a value with -r");
        !            76:                        return (-1);
        !            77:                }
        !            78:                environ_set(env, data->option, NULL);
        !            79:        } else {
        !            80:                if (data->value == NULL) {
        !            81:                        ctx->error(ctx, "no value specified");
        !            82:                        return (-1);
        !            83:                }
        !            84:                environ_set(env, data->option, data->value);
        !            85:        }
        !            86:
        !            87:        return (0);
        !            88: }