1 /* $OpenBSD: cmd-set-environment.c,v 1.18 2016/03/03 14:15:22 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 enum cmd_retval cmd_set_environment_exec(struct cmd *, struct cmd_q *); 31 32 const struct cmd_entry cmd_set_environment_entry = { 33 .name = "set-environment", 34 .alias = "setenv", 35 36 .args = { "grt:u", 1, 2 }, 37 .usage = "[-gru] " CMD_TARGET_SESSION_USAGE " name [value]", 38 39 .tflag = CMD_SESSION_CANFAIL, 40 41 .flags = 0, 42 .exec = cmd_set_environment_exec 43 }; 44 45 enum cmd_retval 46 cmd_set_environment_exec(struct cmd *self, struct cmd_q *cmdq) 47 { 48 struct args *args = self->args; 49 struct environ *env; 50 const char *name, *value, *target; 51 52 name = args->argv[0]; 53 if (*name == '\0') { 54 cmdq_error(cmdq, "empty variable name"); 55 return (CMD_RETURN_ERROR); 56 } 57 if (strchr(name, '=') != NULL) { 58 cmdq_error(cmdq, "variable name contains ="); 59 return (CMD_RETURN_ERROR); 60 } 61 62 if (args->argc < 2) 63 value = NULL; 64 else 65 value = args->argv[1]; 66 67 if (args_has(self->args, 'g')) 68 env = global_environ; 69 else { 70 if (cmdq->state.tflag.s == NULL) { 71 target = args_get(args, 't'); 72 if (target != NULL) 73 cmdq_error(cmdq, "no such session: %s", target); 74 else 75 cmdq_error(cmdq, "no current session"); 76 return (CMD_RETURN_ERROR); 77 } 78 env = cmdq->state.tflag.s->environ; 79 } 80 81 if (args_has(self->args, 'u')) { 82 if (value != NULL) { 83 cmdq_error(cmdq, "can't specify a value with -u"); 84 return (CMD_RETURN_ERROR); 85 } 86 environ_unset(env, name); 87 } else if (args_has(self->args, 'r')) { 88 if (value != NULL) { 89 cmdq_error(cmdq, "can't specify a value with -r"); 90 return (CMD_RETURN_ERROR); 91 } 92 environ_clear(env, name); 93 } else { 94 if (value == NULL) { 95 cmdq_error(cmdq, "no value specified"); 96 return (CMD_RETURN_ERROR); 97 } 98 environ_set(env, name, "%s", value); 99 } 100 101 return (CMD_RETURN_NORMAL); 102 } 103