cmd-set-environment.c

   1 /* $OpenBSD$ */
   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 int     cmd_set_environment_exec(struct cmd *, struct cmd_ctx *);
  31
  32 const struct cmd_entry cmd_set_environment_entry = {
  33         "set-environment", "setenv",
  34         "[-gru] " CMD_TARGET_SESSION_USAGE " name [value]",
  35         CMD_ARG12, "gru",
  36         NULL,
  37         cmd_target_parse,
  38         cmd_set_environment_exec,
  39         cmd_target_free,
  40         cmd_target_print
  41 };
  42
  43 int
  44 cmd_set_environment_exec(struct cmd *self, struct cmd_ctx *ctx)
  45 {
  46         struct cmd_target_data  *data = self->data;
  47         struct session          *s;
  48         struct environ          *env;
  49
  50         if (*data->arg == '\0') {
  51                 ctx->error(ctx, "empty variable name");
  52                 return (-1);
  53         }
  54         if (strchr(data->arg, '=') != NULL) {
  55                 ctx->error(ctx, "variable name contains =");
  56                 return (-1);
  57         }
  58
  59         if (cmd_check_flag(data->chflags, 'g'))
  60                 env = &global_environ;
  61         else {
  62                 if ((s = cmd_find_session(ctx, data->target)) == NULL)
  63                         return (-1);
  64                 env = &s->environ;
  65         }
  66
  67         if (cmd_check_flag(data->chflags, 'u')) {
  68                 if (data->arg2 != NULL) {
  69                         ctx->error(ctx, "can't specify a value with -u");
  70                         return (-1);
  71                 }
  72                 environ_unset(env, data->arg);
  73         } else if (cmd_check_flag(data->chflags, 'r')) {
  74                 if (data->arg2 != NULL) {
  75                         ctx->error(ctx, "can't specify a value with -r");
  76                         return (-1);
  77                 }
  78                 environ_set(env, data->arg, NULL);
  79         } else {
  80                 if (data->arg2 == NULL) {
  81                         ctx->error(ctx, "no value specified");
  82                         return (-1);
  83                 }
  84                 environ_set(env, data->arg, data->arg2);
  85         }
  86
  87         return (0);
  88 }