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1 office 1 /**
2 * @file exit.c
3 * @author Ambroz Bizjak <ambrop7@gmail.com>
4 *
5 * @section LICENSE
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of the author nor the
15 * names of its contributors may be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
22 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
25 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
27 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * @section DESCRIPTION
30 *
31 * Synopsis:
32 * exit(string exit_code)
33 *
34 * Description:
35 * Initiates termination of the interpreter. Calling exit() multiple times will override
36 * the previously set exit code. When the interpreter receives a signal, it reacts
37 * equivalently to calling exit(1) (possibly overriding your error code).
38 */
39  
40 #include <limits.h>
41  
42 #include <ncd/module_common.h>
43  
44 #include <generated/blog_channel_ncd_exit.h>
45  
46 static void func_new (void *unused, NCDModuleInst *i, const struct NCDModuleInst_new_params *params)
47 {
48 // check arguments
49 NCDValRef exit_code_arg;
50 if (!NCDVal_ListRead(params->args, 1, &exit_code_arg)) {
51 ModuleLog(i, BLOG_ERROR, "wrong arity");
52 goto fail0;
53 }
54  
55 // parse exit code
56 uintmax_t exit_code;
57 if (!ncd_read_uintmax(exit_code_arg, &exit_code) || exit_code >= INT_MAX) {
58 ModuleLog(i, BLOG_ERROR, "wrong exit code value");
59 goto fail0;
60 }
61  
62 // signal up
63 NCDModuleInst_Backend_Up(i);
64  
65 // initiate exit (before up!)
66 NCDModuleInst_Backend_InterpExit(i, exit_code);
67 return;
68  
69 fail0:
70 NCDModuleInst_Backend_DeadError(i);
71 }
72  
73 static struct NCDModule modules[] = {
74 {
75 .type = "exit",
76 .func_new2 = func_new
77 }, {
78 .type = NULL
79 }
80 };
81  
82 const struct NCDModuleGroup ncdmodule_exit = {
83 .modules = modules
84 };