1 /* $OpenBSD: cmd-set-environment.c,v 1.22 2017/04/22 10:22:39 nicm Exp $ */ 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 .target = { 't', CMD_FIND_SESSION, CMD_FIND_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->target.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->target.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 } 104