1 /* $OpenBSD: cmd-set-environment.c,v 1.25 2020/04/13 10:59:58 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 = { "hgrt:u", 1, 2 }, 38 .usage = "[-hgru] " 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 = cmd_get_args(self); 50 struct cmd_find_state *target = cmdq_get_target(item); 51 struct environ *env; 52 const char *name, *value, *tflag; 53 54 name = args->argv[0]; 55 if (*name == '\0') { 56 cmdq_error(item, "empty variable name"); 57 return (CMD_RETURN_ERROR); 58 } 59 if (strchr(name, '=') != NULL) { 60 cmdq_error(item, "variable name contains ="); 61 return (CMD_RETURN_ERROR); 62 } 63 64 if (args->argc < 2) 65 value = NULL; 66 else 67 value = args->argv[1]; 68 69 if (args_has(args, 'g')) 70 env = global_environ; 71 else { 72 if (target->s == NULL) { 73 tflag = args_get(args, 't'); 74 if (tflag != NULL) 75 cmdq_error(item, "no such session: %s", tflag); 76 else 77 cmdq_error(item, "no current session"); 78 return (CMD_RETURN_ERROR); 79 } 80 env = target->s->environ; 81 } 82 83 if (args_has(args, 'u')) { 84 if (value != NULL) { 85 cmdq_error(item, "can't specify a value with -u"); 86 return (CMD_RETURN_ERROR); 87 } 88 environ_unset(env, name); 89 } else if (args_has(args, 'r')) { 90 if (value != NULL) { 91 cmdq_error(item, "can't specify a value with -r"); 92 return (CMD_RETURN_ERROR); 93 } 94 environ_clear(env, name); 95 } else { 96 if (value == NULL) { 97 cmdq_error(item, "no value specified"); 98 return (CMD_RETURN_ERROR); 99 } 100 if (args_has(args, 'h')) 101 environ_set(env, name, ENVIRON_HIDDEN, "%s", value); 102 else 103 environ_set(env, name, 0, "%s", value); 104 } 105 106 return (CMD_RETURN_NORMAL); 107 } 108