Annotation of embedaddon/tmux/cmd-set-environment.c, revision 1.1.1.1
1.1 misho 1: /* $OpenBSD$ */
2:
3: /*
4: * Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
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: static enum cmd_retval cmd_set_environment_exec(struct cmd *,
31: struct cmdq_item *);
32:
33: const struct cmd_entry cmd_set_environment_entry = {
34: .name = "set-environment",
35: .alias = "setenv",
36:
37: .args = { "grt:u", 1, 2 },
38: .usage = "[-gru] " CMD_TARGET_SESSION_USAGE " name [value]",
39:
40: .tflag = CMD_SESSION_CANFAIL,
41:
42: .flags = CMD_AFTERHOOK,
43: .exec = cmd_set_environment_exec
44: };
45:
46: static enum cmd_retval
47: cmd_set_environment_exec(struct cmd *self, struct cmdq_item *item)
48: {
49: struct args *args = self->args;
50: struct environ *env;
51: const char *name, *value, *target;
52:
53: name = args->argv[0];
54: if (*name == '\0') {
55: cmdq_error(item, "empty variable name");
56: return (CMD_RETURN_ERROR);
57: }
58: if (strchr(name, '=') != NULL) {
59: cmdq_error(item, "variable name contains =");
60: return (CMD_RETURN_ERROR);
61: }
62:
63: if (args->argc < 2)
64: value = NULL;
65: else
66: value = args->argv[1];
67:
68: if (args_has(self->args, 'g'))
69: env = global_environ;
70: else {
71: if (item->state.tflag.s == NULL) {
72: target = args_get(args, 't');
73: if (target != NULL)
74: cmdq_error(item, "no such session: %s", target);
75: else
76: cmdq_error(item, "no current session");
77: return (CMD_RETURN_ERROR);
78: }
79: env = item->state.tflag.s->environ;
80: }
81:
82: if (args_has(self->args, 'u')) {
83: if (value != NULL) {
84: cmdq_error(item, "can't specify a value with -u");
85: return (CMD_RETURN_ERROR);
86: }
87: environ_unset(env, name);
88: } else if (args_has(self->args, 'r')) {
89: if (value != NULL) {
90: cmdq_error(item, "can't specify a value with -r");
91: return (CMD_RETURN_ERROR);
92: }
93: environ_clear(env, name);
94: } else {
95: if (value == NULL) {
96: cmdq_error(item, "no value specified");
97: return (CMD_RETURN_ERROR);
98: }
99: environ_set(env, name, "%s", value);
100: }
101:
102: return (CMD_RETURN_NORMAL);
103: }
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