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1 | // Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT |
2 | // file at the top-level directory of this distribution and at | |
3 | // http://rust-lang.org/COPYRIGHT. | |
4 | // | |
5 | // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | |
6 | // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | |
7 | // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | |
8 | // option. This file may not be copied, modified, or distributed | |
9 | // except according to those terms. | |
10 | ||
3b2f2976 | 11 | //! Global initialization and retrieval of command line arguments. |
c30ab7b3 SL |
12 | //! |
13 | //! On some platforms these are stored during runtime startup, | |
14 | //! and on some they are retrieved from the system on demand. | |
15 | ||
16 | #![allow(dead_code)] // runtime init functions not used during testing | |
17 | ||
18 | use ffi::OsString; | |
19 | use marker::PhantomData; | |
20 | use vec; | |
21 | ||
22 | /// One-time global initialization. | |
23 | pub unsafe fn init(argc: isize, argv: *const *const u8) { imp::init(argc, argv) } | |
24 | ||
25 | /// One-time global cleanup. | |
26 | pub unsafe fn cleanup() { imp::cleanup() } | |
27 | ||
28 | /// Returns the command line arguments | |
29 | pub fn args() -> Args { | |
30 | imp::args() | |
31 | } | |
32 | ||
33 | pub struct Args { | |
34 | iter: vec::IntoIter<OsString>, | |
35 | _dont_send_or_sync_me: PhantomData<*mut ()>, | |
36 | } | |
37 | ||
041b39d2 XL |
38 | impl Args { |
39 | pub fn inner_debug(&self) -> &[OsString] { | |
40 | self.iter.as_slice() | |
41 | } | |
42 | } | |
43 | ||
c30ab7b3 SL |
44 | impl Iterator for Args { |
45 | type Item = OsString; | |
46 | fn next(&mut self) -> Option<OsString> { self.iter.next() } | |
47 | fn size_hint(&self) -> (usize, Option<usize>) { self.iter.size_hint() } | |
48 | } | |
49 | ||
50 | impl ExactSizeIterator for Args { | |
51 | fn len(&self) -> usize { self.iter.len() } | |
52 | } | |
53 | ||
54 | impl DoubleEndedIterator for Args { | |
55 | fn next_back(&mut self) -> Option<OsString> { self.iter.next_back() } | |
56 | } | |
57 | ||
58 | #[cfg(any(target_os = "linux", | |
59 | target_os = "android", | |
60 | target_os = "freebsd", | |
61 | target_os = "dragonfly", | |
62 | target_os = "bitrig", | |
63 | target_os = "netbsd", | |
64 | target_os = "openbsd", | |
65 | target_os = "solaris", | |
66 | target_os = "emscripten", | |
67 | target_os = "haiku", | |
68 | target_os = "fuchsia"))] | |
69 | mod imp { | |
70 | use os::unix::prelude::*; | |
71 | use mem; | |
72 | use ffi::{CStr, OsString}; | |
73 | use marker::PhantomData; | |
74 | use libc; | |
75 | use super::Args; | |
76 | ||
77 | use sys_common::mutex::Mutex; | |
78 | ||
79 | static mut GLOBAL_ARGS_PTR: usize = 0; | |
80 | static LOCK: Mutex = Mutex::new(); | |
81 | ||
82 | pub unsafe fn init(argc: isize, argv: *const *const u8) { | |
83 | let args = (0..argc).map(|i| { | |
84 | CStr::from_ptr(*argv.offset(i) as *const libc::c_char).to_bytes().to_vec() | |
85 | }).collect(); | |
86 | ||
87 | LOCK.lock(); | |
88 | let ptr = get_global_ptr(); | |
89 | assert!((*ptr).is_none()); | |
90 | (*ptr) = Some(box args); | |
91 | LOCK.unlock(); | |
92 | } | |
93 | ||
94 | pub unsafe fn cleanup() { | |
95 | LOCK.lock(); | |
96 | *get_global_ptr() = None; | |
97 | LOCK.unlock(); | |
98 | } | |
99 | ||
100 | pub fn args() -> Args { | |
101 | let bytes = clone().unwrap_or(Vec::new()); | |
102 | let v: Vec<OsString> = bytes.into_iter().map(|v| { | |
103 | OsStringExt::from_vec(v) | |
104 | }).collect(); | |
105 | Args { iter: v.into_iter(), _dont_send_or_sync_me: PhantomData } | |
106 | } | |
107 | ||
108 | fn clone() -> Option<Vec<Vec<u8>>> { | |
109 | unsafe { | |
110 | LOCK.lock(); | |
111 | let ptr = get_global_ptr(); | |
112 | let ret = (*ptr).as_ref().map(|s| (**s).clone()); | |
113 | LOCK.unlock(); | |
114 | return ret | |
115 | } | |
116 | } | |
117 | ||
118 | fn get_global_ptr() -> *mut Option<Box<Vec<Vec<u8>>>> { | |
119 | unsafe { mem::transmute(&GLOBAL_ARGS_PTR) } | |
120 | } | |
121 | ||
122 | } | |
123 | ||
124 | #[cfg(any(target_os = "macos", | |
125 | target_os = "ios"))] | |
126 | mod imp { | |
127 | use ffi::CStr; | |
128 | use marker::PhantomData; | |
129 | use libc; | |
130 | use super::Args; | |
131 | ||
132 | pub unsafe fn init(_argc: isize, _argv: *const *const u8) { | |
133 | } | |
134 | ||
135 | pub fn cleanup() { | |
136 | } | |
137 | ||
138 | #[cfg(target_os = "macos")] | |
139 | pub fn args() -> Args { | |
140 | use os::unix::prelude::*; | |
141 | extern { | |
142 | // These functions are in crt_externs.h. | |
143 | fn _NSGetArgc() -> *mut libc::c_int; | |
144 | fn _NSGetArgv() -> *mut *mut *mut libc::c_char; | |
145 | } | |
146 | ||
147 | let vec = unsafe { | |
148 | let (argc, argv) = (*_NSGetArgc() as isize, | |
149 | *_NSGetArgv() as *const *const libc::c_char); | |
150 | (0.. argc as isize).map(|i| { | |
151 | let bytes = CStr::from_ptr(*argv.offset(i)).to_bytes().to_vec(); | |
152 | OsStringExt::from_vec(bytes) | |
153 | }).collect::<Vec<_>>() | |
154 | }; | |
155 | Args { | |
156 | iter: vec.into_iter(), | |
157 | _dont_send_or_sync_me: PhantomData, | |
158 | } | |
159 | } | |
160 | ||
161 | // As _NSGetArgc and _NSGetArgv aren't mentioned in iOS docs | |
162 | // and use underscores in their names - they're most probably | |
163 | // are considered private and therefore should be avoided | |
164 | // Here is another way to get arguments using Objective C | |
165 | // runtime | |
166 | // | |
167 | // In general it looks like: | |
168 | // res = Vec::new() | |
169 | // let args = [[NSProcessInfo processInfo] arguments] | |
170 | // for i in (0..[args count]) | |
171 | // res.push([args objectAtIndex:i]) | |
172 | // res | |
173 | #[cfg(target_os = "ios")] | |
174 | pub fn args() -> Args { | |
175 | use ffi::OsString; | |
176 | use mem; | |
177 | use str; | |
178 | ||
179 | extern { | |
180 | fn sel_registerName(name: *const libc::c_uchar) -> Sel; | |
c30ab7b3 SL |
181 | fn objc_getClass(class_name: *const libc::c_uchar) -> NsId; |
182 | } | |
183 | ||
476ff2be SL |
184 | #[cfg(target_arch="aarch64")] |
185 | extern { | |
186 | fn objc_msgSend(obj: NsId, sel: Sel) -> NsId; | |
187 | #[link_name="objc_msgSend"] | |
188 | fn objc_msgSend_ul(obj: NsId, sel: Sel, i: libc::c_ulong) -> NsId; | |
189 | } | |
190 | ||
191 | #[cfg(not(target_arch="aarch64"))] | |
192 | extern { | |
193 | fn objc_msgSend(obj: NsId, sel: Sel, ...) -> NsId; | |
194 | #[link_name="objc_msgSend"] | |
195 | fn objc_msgSend_ul(obj: NsId, sel: Sel, ...) -> NsId; | |
196 | } | |
197 | ||
c30ab7b3 SL |
198 | type Sel = *const libc::c_void; |
199 | type NsId = *const libc::c_void; | |
200 | ||
201 | let mut res = Vec::new(); | |
202 | ||
203 | unsafe { | |
204 | let process_info_sel = sel_registerName("processInfo\0".as_ptr()); | |
205 | let arguments_sel = sel_registerName("arguments\0".as_ptr()); | |
206 | let utf8_sel = sel_registerName("UTF8String\0".as_ptr()); | |
207 | let count_sel = sel_registerName("count\0".as_ptr()); | |
208 | let object_at_sel = sel_registerName("objectAtIndex:\0".as_ptr()); | |
209 | ||
210 | let klass = objc_getClass("NSProcessInfo\0".as_ptr()); | |
211 | let info = objc_msgSend(klass, process_info_sel); | |
212 | let args = objc_msgSend(info, arguments_sel); | |
213 | ||
214 | let cnt: usize = mem::transmute(objc_msgSend(args, count_sel)); | |
215 | for i in 0..cnt { | |
476ff2be | 216 | let tmp = objc_msgSend_ul(args, object_at_sel, i as libc::c_ulong); |
c30ab7b3 SL |
217 | let utf_c_str: *const libc::c_char = |
218 | mem::transmute(objc_msgSend(tmp, utf8_sel)); | |
219 | let bytes = CStr::from_ptr(utf_c_str).to_bytes(); | |
220 | res.push(OsString::from(str::from_utf8(bytes).unwrap())) | |
221 | } | |
222 | } | |
223 | ||
224 | Args { iter: res.into_iter(), _dont_send_or_sync_me: PhantomData } | |
225 | } | |
226 | } |