1 /* $OpenBSD: cmd-set-environment.c,v 1.3 2009/11/13 19:53:29 nicm Exp $ */
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_TARGET_SESSION_USAGE " name [value]",
35 	CMD_ARG12, "gru",
36 	NULL,
37 	cmd_target_parse,
38 	cmd_set_environment_exec,
39 	cmd_target_free,
40 	cmd_target_print
41 };
42 
43 int
44 cmd_set_environment_exec(struct cmd *self, struct cmd_ctx *ctx)
45 {
46 	struct cmd_target_data	*data = self->data;
47 	struct session		*s;
48 	struct environ		*env;
49 
50 	if (*data->arg == '\0') {
51 		ctx->error(ctx, "empty variable name");
52 		return (-1);
53 	}
54 	if (strchr(data->arg, '=') != NULL) {
55 		ctx->error(ctx, "variable name contains =");
56 		return (-1);
57 	}
58 
59 	if (cmd_check_flag(data->chflags, '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 (cmd_check_flag(data->chflags, 'u')) {
68 		if (data->arg2 != NULL) {
69 			ctx->error(ctx, "can't specify a value with -u");
70 			return (-1);
71 		}
72 		environ_unset(env, data->arg);
73 	} else if (cmd_check_flag(data->chflags, 'r')) {
74 		if (data->arg2 != NULL) {
75 			ctx->error(ctx, "can't specify a value with -r");
76 			return (-1);
77 		}
78 		environ_set(env, data->arg, NULL);
79 	} else {
80 		if (data->arg2 == NULL) {
81 			ctx->error(ctx, "no value specified");
82 			return (-1);
83 		}
84 		environ_set(env, data->arg, data->arg2);
85 	}
86 
87 	return (0);
88 }
89