1 /* $OpenBSD: cmd-set-environment.c,v 1.9 2013/10/10 12:00:23 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 enum cmd_retval cmd_set_environment_exec(struct cmd *, struct cmd_q *); 31 32 const struct cmd_entry cmd_set_environment_entry = { 33 "set-environment", "setenv", 34 "grt:u", 1, 2, 35 "[-gru] " CMD_TARGET_SESSION_USAGE " name [value]", 36 0, 37 NULL, 38 cmd_set_environment_exec 39 }; 40 41 enum cmd_retval 42 cmd_set_environment_exec(struct cmd *self, struct cmd_q *cmdq) 43 { 44 struct args *args = self->args; 45 struct session *s; 46 struct environ *env; 47 const char *name, *value; 48 49 name = args->argv[0]; 50 if (*name == '\0') { 51 cmdq_error(cmdq, "empty variable name"); 52 return (CMD_RETURN_ERROR); 53 } 54 if (strchr(name, '=') != NULL) { 55 cmdq_error(cmdq, "variable name contains ="); 56 return (CMD_RETURN_ERROR); 57 } 58 59 if (args->argc < 2) 60 value = NULL; 61 else 62 value = args->argv[1]; 63 64 if (args_has(self->args, 'g')) 65 env = &global_environ; 66 else { 67 if ((s = cmd_find_session(cmdq, args_get(args, 't'), 0)) == NULL) 68 return (CMD_RETURN_ERROR); 69 env = &s->environ; 70 } 71 72 if (args_has(self->args, 'u')) { 73 if (value != NULL) { 74 cmdq_error(cmdq, "can't specify a value with -u"); 75 return (CMD_RETURN_ERROR); 76 } 77 environ_unset(env, name); 78 } else if (args_has(self->args, 'r')) { 79 if (value != NULL) { 80 cmdq_error(cmdq, "can't specify a value with -r"); 81 return (CMD_RETURN_ERROR); 82 } 83 environ_set(env, name, NULL); 84 } else { 85 if (value == NULL) { 86 cmdq_error(cmdq, "no value specified"); 87 return (CMD_RETURN_ERROR); 88 } 89 environ_set(env, name, value); 90 } 91 92 return (CMD_RETURN_NORMAL); 93 } 94