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Auto merge of #30175 - alexcrichton:less-c-code, r=brson 

All these definitions can now be written in Rust, so do so!
This commit is contained in:
bors 2015-12-22 07:23:16 +00:00
parent 439e1843b9 2f42ac438e
commit 5178449f1c
9 changed files with 157 additions and 667 deletions
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2
mk/crates.mk
View File

@ -71,7 +71,7 @@ DEPS_rustc_bitflags := core
DEPS_rustc_unicode := core
DEPS_std := core libc rand alloc collections rustc_unicode \
native:rust_builtin native:backtrace \
native:backtrace \
alloc_system
DEPS_arena := std
DEPS_glob := std

4
mk/rt.mk
View File

@ -35,7 +35,7 @@
# that's per-target so you're allowed to conditionally add files based on the
# target.
################################################################################
NATIVE_LIBS := rust_builtin hoedown miniz rust_test_helpers
NATIVE_LIBS := hoedown miniz rust_test_helpers
# $(1) is the target triple
define NATIVE_LIBRARIES
@ -50,8 +50,6 @@ NATIVE_DEPS_hoedown_$(1) := hoedown/src/autolink.c \
hoedown/src/stack.c \
hoedown/src/version.c
NATIVE_DEPS_miniz_$(1) = miniz.c
NATIVE_DEPS_rust_builtin_$(1) := rust_builtin.c \
rust_android_dummy.c
NATIVE_DEPS_rust_test_helpers_$(1) := rust_test_helpers.c
################################################################################

11
src/liballoc_jemalloc/lib.rs
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@ -108,3 +108,14 @@ pub extern "C" fn __rust_usable_size(size: usize, align: usize) -> usize {
let flags = align_to_flags(align);
unsafe { je_nallocx(size as size_t, flags) as usize }
}
// These symbols are used by jemalloc on android but the really old android
// we're building on doesn't have them defined, so just make sure the symbols
// are available.
#[no_mangle]
#[cfg(target_os = "android")]
pub extern fn pthread_atfork(_prefork: *mut u8,
_postfork_parent: *mut u8,
_postfork_child: *mut u8) -> i32 {
0
}

5
src/libstd/rtdeps.rs
View File

@ -12,11 +12,6 @@
//! the standard library This varies per-platform, but these libraries are
//! necessary for running libstd.
// A few small shims in C that haven't been translated to Rust yet
#[cfg(all(not(test), not(windows)))]
#[link(name = "rust_builtin", kind = "static")]
extern {}
// LLVM implements the `frem` instruction as a call to `fmod`, which lives in
// libm. Hence, we must explicitly link to it.
//

112
src/libstd/sys/unix/fs.rs
View File

@ -14,7 +14,8 @@ use os::unix::prelude::*;
use ffi::{CString, CStr, OsString, OsStr};
use fmt;
use io::{self, Error, ErrorKind, SeekFrom};
use libc::{self, c_int, off_t, c_char, mode_t};
use libc::{dirent, readdir_r};
use libc::{self, c_int, off_t, mode_t};
use mem;
use path::{Path, PathBuf};
use ptr;
@ -43,7 +44,7 @@ unsafe impl Send for Dir {}
unsafe impl Sync for Dir {}
pub struct DirEntry {
buf: Vec<u8>, // actually *mut libc::dirent
entry: dirent,
root: Arc<PathBuf>,
}
@ -126,32 +127,22 @@ impl Iterator for ReadDir {
type Item = io::Result<DirEntry>;
fn next(&mut self) -> Option<io::Result<DirEntry>> {
extern {
fn rust_dirent_t_size() -> libc::size_t;
}
let mut buf: Vec<u8> = Vec::with_capacity(unsafe {
rust_dirent_t_size()
});
let ptr = buf.as_mut_ptr() as *mut libc::dirent;
let mut entry_ptr = ptr::null_mut();
loop {
if unsafe { libc::readdir_r(self.dirp.0, ptr, &mut entry_ptr) != 0 } {
return Some(Err(Error::last_os_error()))
}
if entry_ptr.is_null() {
return None
}
let entry = DirEntry {
buf: buf,
unsafe {
let mut ret = DirEntry {
entry: mem::zeroed(),
root: self.root.clone()
};
if entry.name_bytes() == b"." || entry.name_bytes() == b".." {
buf = entry.buf;
} else {
return Some(Ok(entry))
let mut entry_ptr = ptr::null_mut();
loop {
if readdir_r(self.dirp.0, &mut ret.entry, &mut entry_ptr) != 0 {
return Some(Err(Error::last_os_error()))
}
if entry_ptr.is_null() {
return None
}
if ret.name_bytes() != b"." && ret.name_bytes() != b".." {
return Some(Ok(ret))
}
}
}
}
@ -166,7 +157,7 @@ impl Drop for Dir {
impl DirEntry {
pub fn path(&self) -> PathBuf {
self.root.join(<OsStr as OsStrExt>::from_bytes(self.name_bytes()))
self.root.join(OsStr::from_bytes(self.name_bytes()))
}
pub fn file_name(&self) -> OsString {
@ -178,35 +169,64 @@ impl DirEntry {
}
pub fn file_type(&self) -> io::Result<FileType> {
extern {
fn rust_dir_get_mode(ptr: *mut libc::dirent) -> c_int;
}
unsafe {
match rust_dir_get_mode(self.dirent()) {
-1 => lstat(&self.path()).map(|m| m.file_type()),
n => Ok(FileType { mode: n as mode_t }),
}
match self.entry.d_type {
libc::DT_CHR => Ok(FileType { mode: libc::S_IFCHR }),
libc::DT_FIFO => Ok(FileType { mode: libc::S_IFIFO }),
libc::DT_LNK => Ok(FileType { mode: libc::S_IFLNK }),
libc::DT_REG => Ok(FileType { mode: libc::S_IFREG }),
libc::DT_SOCK => Ok(FileType { mode: libc::S_IFSOCK }),
libc::DT_DIR => Ok(FileType { mode: libc::S_IFDIR }),
libc::DT_BLK => Ok(FileType { mode: libc::S_IFBLK }),
_ => lstat(&self.path()).map(|m| m.file_type()),
}
}
#[cfg(any(target_os = "macos",
target_os = "ios",
target_os = "linux"))]
pub fn ino(&self) -> raw::ino_t {
extern {
fn rust_dir_get_ino(ptr: *mut libc::dirent) -> raw::ino_t;
}
unsafe { rust_dir_get_ino(self.dirent()) }
self.entry.d_ino
}
#[cfg(target_os = "android")]
pub fn ino(&self) -> raw::ino_t {
self.entry.d_ino as raw::ino_t
}
#[cfg(any(target_os = "freebsd",
target_os = "openbsd",
target_os = "bitrig",
target_os = "netbsd",
target_os = "dragonfly"))]
pub fn ino(&self) -> raw::ino_t {
self.entry.d_fileno
}
#[cfg(any(target_os = "macos",
target_os = "ios",
target_os = "netbsd"))]
fn name_bytes(&self) -> &[u8] {
extern {
fn rust_list_dir_val(ptr: *mut libc::dirent) -> *const c_char;
}
unsafe {
CStr::from_ptr(rust_list_dir_val(self.dirent())).to_bytes()
::slice::from_raw_parts(self.entry.d_name.as_ptr() as *const u8,
self.entry.d_namlen as usize)
}
}
fn dirent(&self) -> *mut libc::dirent {
self.buf.as_ptr() as *mut _
#[cfg(any(target_os = "freebsd",
target_os = "dragonfly",
target_os = "bitrig",
target_os = "openbsd"))]
fn name_bytes(&self) -> &[u8] {
unsafe {
::slice::from_raw_parts(self.entry.d_name.as_ptr() as *const u8,
self.entry.d_namelen as usize)
}
}
#[cfg(any(target_os = "android",
target_os = "linux"))]
fn name_bytes(&self) -> &[u8] {
unsafe {
CStr::from_ptr(self.entry.d_name.as_ptr()).to_bytes()
}
}
}

67
src/libstd/sys/unix/os.rs
View File

@ -38,12 +38,17 @@ static ENV_LOCK: StaticMutex = StaticMutex::new();
/// Returns the platform-specific value of errno
pub fn errno() -> i32 {
extern {
#[cfg_attr(any(target_os = "linux", target_os = "android"), link_name = "__errno_location")]
#[cfg_attr(any(target_os = "bitrig", target_os = "netbsd", target_os = "openbsd",
#[cfg_attr(any(target_os = "linux"), link_name = "__errno_location")]
#[cfg_attr(any(target_os = "bitrig",
target_os = "netbsd",
target_os = "openbsd",
target_os = "android",
target_env = "newlib"),
link_name = "__errno")]
#[cfg_attr(target_os = "dragonfly", link_name = "__dfly_error")]
#[cfg_attr(any(target_os = "macos", target_os = "ios", target_os = "freebsd"),
#[cfg_attr(any(target_os = "macos",
target_os = "ios",
target_os = "freebsd"),
link_name = "__error")]
fn errno_location() -> *const c_int;
}
@ -173,17 +178,19 @@ pub fn current_exe() -> io::Result<PathBuf> {
libc::KERN_PROC_PATHNAME as c_int,
-1 as c_int];
let mut sz: libc::size_t = 0;
let err = libc::sysctl(mib.as_mut_ptr(), mib.len() as ::libc::c_uint,
ptr::null_mut(), &mut sz, ptr::null_mut(),
0 as libc::size_t);
if err != 0 { return Err(io::Error::last_os_error()); }
if sz == 0 { return Err(io::Error::last_os_error()); }
try!(cvt(libc::sysctl(mib.as_mut_ptr(), mib.len() as ::libc::c_uint,
ptr::null_mut(), &mut sz, ptr::null_mut(),
0 as libc::size_t)));
if sz == 0 {
return Err(io::Error::last_os_error())
}
let mut v: Vec<u8> = Vec::with_capacity(sz as usize);
let err = libc::sysctl(mib.as_mut_ptr(), mib.len() as ::libc::c_uint,
v.as_mut_ptr() as *mut libc::c_void, &mut sz,
ptr::null_mut(), 0 as libc::size_t);
if err != 0 { return Err(io::Error::last_os_error()); }
if sz == 0 { return Err(io::Error::last_os_error()); }
try!(cvt(libc::sysctl(mib.as_mut_ptr(), mib.len() as ::libc::c_uint,
v.as_mut_ptr() as *mut libc::c_void, &mut sz,
ptr::null_mut(), 0 as libc::size_t)));
if sz == 0 {
return Err(io::Error::last_os_error());
}
v.set_len(sz as usize - 1); // chop off trailing NUL
Ok(PathBuf::from(OsString::from_vec(v)))
}
@ -201,22 +208,28 @@ pub fn current_exe() -> io::Result<PathBuf> {
#[cfg(any(target_os = "bitrig", target_os = "openbsd"))]
pub fn current_exe() -> io::Result<PathBuf> {
use sync::StaticMutex;
static LOCK: StaticMutex = StaticMutex::new();
extern {
fn rust_current_exe() -> *const c_char;
}
let _guard = LOCK.lock();
unsafe {
let v = rust_current_exe();
if v.is_null() {
Err(io::Error::last_os_error())
let mut mib = [libc::CTL_KERN,
libc::KERN_PROC_ARGS,
libc::getpid(),
libc::KERN_PROC_ARGV];
let mib = mib.as_mut_ptr();
let mut argv_len = 0;
try!(cvt(libc::sysctl(mib, 4, 0 as *mut _, &mut argv_len,
0 as *mut _, 0)));
let mut argv = Vec::<*const libc::c_char>::with_capacity(argv_len as usize);
try!(cvt(libc::sysctl(mib, 4, argv.as_mut_ptr() as *mut _,
&mut argv_len, 0 as *mut _, 0)));
argv.set_len(argv_len as usize);
if argv[0].is_null() {
return Err(io::Error::new(io::ErrorKind::Other,
"no current exe available"))
}
let argv0 = CStr::from_ptr(argv[0]).to_bytes();
if argv0[0] == b'.' || argv0.iter().any(|b| *b == b'/') {
::fs::canonicalize(OsStr::from_bytes(argv0))
} else {
let vec = CStr::from_ptr(v).to_bytes().to_vec();
Ok(PathBuf::from(OsString::from_vec(vec)))
Ok(PathBuf::from(OsStr::from_bytes(argv0)))
}
}
}

41
src/libtest/lib.rs
View File

@ -906,10 +906,45 @@ fn get_concurrency() -> usize {
}
}
#[cfg(unix)]
#[cfg(any(target_os = "linux",
target_os = "macos",
target_os = "ios",
target_os = "android"))]
fn num_cpus() -> usize {
extern { fn rust_get_num_cpus() -> libc::uintptr_t; }
unsafe { rust_get_num_cpus() as usize }
unsafe {
libc::sysconf(libc::_SC_NPROCESSORS_ONLN) as usize
}
}
#[cfg(any(target_os = "freebsd",
target_os = "dragonfly",
target_os = "bitrig",
target_os = "openbsd",
target_os = "netbsd"))]
fn num_cpus() -> usize {
let mut cpus: libc::c_uint = 0;
let mut CPUS_SIZE = std::mem::size_of_val(&cpus);
let mut mib = [libc::CTL_HW, libc::HW_AVAILCPU, 0, 0];
unsafe {
libc::sysctl(mib.as_mut_ptr(), 2,
&mut cpus as *mut _ as *mut _,
&mut CPUS_SIZE as *mut _ as *mut _,
0 as *mut _, 0);
}
if cpus < 1 {
mib[1] = HW_NCPU;
unsafe {
libc::sysctl(mib.as_mut_ptr(), 2,
&mut cpus as *mut _ as *mut _,
&mut CPUS_SIZE as *mut _ as *mut _,
0 as *mut _, 0);
}
if cpus < 1 {
cpus = 1;
}
}
cpus as usize
}
}

112
src/rt/rust_android_dummy.c
View File

@ -1,112 +0,0 @@
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifdef __ANDROID__
#include "rust_android_dummy.h"
#include <math.h>
#include <errno.h>
int backtrace(void **array, int size) { return 0; }
char **backtrace_symbols(void *const *array, int size) { return 0; }
void backtrace_symbols_fd (void *const *array, int size, int fd) {}
volatile int* __errno_location() {
return &errno;
}
float log2f(float f)
{
return logf( f ) / logf( 2 );
}
double log2( double n )
{
return log( n ) / log( 2 );
}
double exp10( double x )
{
return pow( 10, x );
}
void telldir()
{
}
void seekdir()
{
}
void mkfifo()
{
}
void abs()
{
}
void labs()
{
}
void rand()
{
}
void srand()
{
}
void atof()
{
}
int glob(const char *pattern,
int flags,
int (*errfunc) (const char *epath, int eerrno),
glob_t *pglob)
{
return 0;
}
void globfree(glob_t *pglob)
{
}
int pthread_atfork(void (*prefork)(void),
void (*postfork_parent)(void),
void (*postfork_child)(void))
{
return 0;
}
int mlockall(int flags)
{
return 0;
}
int munlockall(void)
{
return 0;
}
int shm_open(const char *name, int oflag, mode_t mode)
{
return 0;
}
int shm_unlink(const char *name)
{
return 0;
}
int posix_madvise(void *addr, size_t len, int advice)
{
return 0;
}
#endif

470
src/rt/rust_builtin.c
View File

@ -1,470 +0,0 @@
// Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
#if !defined(_WIN32)
#include <stdint.h>
#include <time.h>
#include <string.h>
#include <assert.h>
#include <stdlib.h>
#include <dirent.h>
#include <pthread.h>
#include <signal.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#ifdef __APPLE__
#include <TargetConditionals.h>
#include <mach/mach_time.h>
#if !(TARGET_OS_IPHONE)
#include <crt_externs.h>
#endif
#endif
char*
rust_list_dir_val(struct dirent* entry_ptr) {
return entry_ptr->d_name;
}
// Android's struct dirent does have d_type from the very beginning
// (android-3). _DIRENT_HAVE_D_TYPE is not defined all the way to android-21
// though...
#if defined(__ANDROID__)
# define _DIRENT_HAVE_D_TYPE
#endif
int
rust_dir_get_mode(struct dirent* entry_ptr) {
#if defined(_DIRENT_HAVE_D_TYPE) || defined(__APPLE__)
switch (entry_ptr->d_type) {
case DT_BLK: return S_IFBLK;
case DT_CHR: return S_IFCHR;
case DT_FIFO: return S_IFIFO;
case DT_LNK: return S_IFLNK;
case DT_REG: return S_IFREG;
case DT_SOCK: return S_IFSOCK;
case DT_DIR: return S_IFDIR;
}
#endif
return -1;
}
ino_t
rust_dir_get_ino(struct dirent* entry_ptr) {
return entry_ptr->d_ino;
}
DIR*
rust_opendir(char *dirname) {
return opendir(dirname);
}
int
rust_readdir_r(DIR *dirp, struct dirent *entry, struct dirent **result) {
return readdir_r(dirp, entry, result);
}
size_t
rust_dirent_t_size() {
return sizeof(struct dirent);
}
#if defined(__BSD__)
static int
get_num_cpus() {
/* swiped from http://stackoverflow.com/questions/150355/
programmatically-find-the-number-of-cores-on-a-machine */
unsigned int numCPU;
int mib[4];
size_t len = sizeof(numCPU);
/* set the mib for hw.ncpu */
mib[0] = CTL_HW;
mib[1] = HW_AVAILCPU; // alternatively, try HW_NCPU;
/* get the number of CPUs from the system */
sysctl(mib, 2, &numCPU, &len, NULL, 0);
if( numCPU < 1 ) {
mib[1] = HW_NCPU;
sysctl( mib, 2, &numCPU, &len, NULL, 0 );
if( numCPU < 1 ) {
numCPU = 1;
}
}
return numCPU;
}
#elif defined(__GNUC__)
static int
get_num_cpus() {
return sysconf(_SC_NPROCESSORS_ONLN);
}
#endif
uintptr_t
rust_get_num_cpus() {
return get_num_cpus();
}
#if defined(__DragonFly__)
#include <errno.h>
// In DragonFly __error() is an inline function and as such
// no symbol exists for it.
int *__dfly_error(void) { return __error(); }
#endif
#if defined(__Bitrig__)
#include <stdio.h>
#include <sys/param.h>
#include <sys/sysctl.h>
#include <limits.h>
int rust_get_path(void *p, size_t* sz)
{
int mib[4];
char *eq = NULL;
char *key = NULL;
char *val = NULL;
char **menv = NULL;
size_t maxlen, len;
int nenv = 0;
int i;
if ((p == NULL) && (sz == NULL))
return -1;
/* get the argv array */
mib[0] = CTL_KERN;
mib[1] = KERN_PROC_ARGS;
mib[2] = getpid();
mib[3] = KERN_PROC_ENV;
/* get the number of bytes needed to get the env */
maxlen = 0;
if (sysctl(mib, 4, NULL, &maxlen, NULL, 0) == -1)
return -1;
/* allocate the buffer */
if ((menv = calloc(maxlen, sizeof(char))) == NULL)
return -1;
/* get the env array */
if (sysctl(mib, 4, menv, &maxlen, NULL, 0) == -1)
{
free(menv);
return -1;
}
mib[3] = KERN_PROC_NENV;
len = sizeof(int);
/* get the length of env array */
if (sysctl(mib, 4, &nenv, &len, NULL, 0) == -1)
{
free(menv);
return -1;
}
/* find _ key and resolve the value */
for (i = 0; i < nenv; i++)
{
if ((eq = strstr(menv[i], "=")) == NULL)
continue;
key = menv[i];
val = eq + 1;
*eq = '\0';
if (strncmp(key, "PATH", maxlen) != 0)
continue;
if (p == NULL)
{
/* return the length of the value + NUL */
*sz = strnlen(val, maxlen) + 1;
free(menv);
return 0;
}
else
{
/* copy *sz bytes to the output buffer */
memcpy(p, val, *sz);
free(menv);
return 0;
}
}
free(menv);
return -1;
}
int rust_get_path_array(void * p, size_t * sz)
{
char *path, *str;
char **buf;
int i, num;
size_t len;
if ((p == NULL) && (sz == NULL))
return -1;
/* get the length of the PATH value */
if (rust_get_path(NULL, &len) == -1)
return -1;
if (len == 0)
return -1;
/* allocate the buffer */
if ((path = calloc(len, sizeof(char))) == NULL)
return -1;
/* get the PATH value */
if (rust_get_path(path, &len) == -1)
{
free(path);
return -1;
}
/* count the number of parts in the PATH */
num = 1;
for(str = path; *str != '\0'; str++)
{
if (*str == ':')
num++;
}
/* calculate the size of the buffer for the 2D array */
len = (num * sizeof(char*) + 1) + strlen(path) + 1;
if (p == NULL)
{
free(path);
*sz = len;
return 0;
}
/* make sure we have enough buffer space */
if (*sz < len)
{
free(path);
return -1;
}
/* zero out the buffer */
buf = (char**)p;
memset(buf, 0, *sz);
/* copy the data into the right place */
str = p + ((num+1) * sizeof(char*));
memcpy(str, path, strlen(path));
/* parse the path into it's parts */
for (i = 0; i < num && (buf[i] = strsep(&str, ":")) != NULL; i++) {;}
buf[num] = NULL;
free(path);
return 0;
}
int rust_get_argv_zero(void* p, size_t* sz)
{
int mib[4];
char **argv = NULL;
size_t len;
if ((p == NULL) && (sz == NULL))
return -1;
/* get the argv array */
mib[0] = CTL_KERN;
mib[1] = KERN_PROC_ARGS;
mib[2] = getpid();
mib[3] = KERN_PROC_ARGV;
/* request KERN_PROC_ARGV size */
len = 0;
if (sysctl(mib, 4, NULL, &len, NULL, 0) == -1)
return -1;
/* allocate buffer to receive the values */
if ((argv = malloc(len)) == NULL)
return -1;
/* get the argv array */
if (sysctl(mib, 4, argv, &len, NULL, 0) == -1)
{
free(argv);
return -1;
}
/* get length of argv[0] */
len = strnlen(argv[0], len) + 1;
if (p == NULL)
{
*sz = len;
free(argv);
return 0;
}
if (*sz < len)
{
free(argv);
return -1;
}
memcpy(p, argv[0], len);
free(argv);
return 0;
}
const char * rust_current_exe()
{
static char *self = NULL;
char *argv0;
char **paths;
size_t sz;
int i;
/* If `PATH_MAX` is defined on the platform, `realpath` will truncate the
* resolved path up to `PATH_MAX`. While this can make the resolution fail if
* the executable is placed in a deep path, the usage of a buffer whose
* length depends on `PATH_MAX` is still memory safe. */
char buf[2*PATH_MAX], exe[PATH_MAX];
if (self != NULL)
return self;
if (rust_get_argv_zero(NULL, &sz) == -1)
return NULL;
if ((argv0 = calloc(sz, sizeof(char))) == NULL)
return NULL;
if (rust_get_argv_zero(argv0, &sz) == -1)
{
free(argv0);
return NULL;
}
/* if argv0 is a relative or absolute path, resolve it with realpath */
if ((*argv0 == '.') || (*argv0 == '/') || (strstr(argv0, "/") != NULL))
{
self = realpath(argv0, NULL);
free(argv0);
return self;
}
/* get the path array */
if (rust_get_path_array(NULL, &sz) == -1)
{
free(argv0);
return NULL;
}
if ((paths = calloc(sz, sizeof(char))) == NULL)
{
free(argv0);
return NULL;
}
if (rust_get_path_array(paths, &sz) == -1)
{
free(argv0);
free(paths);
return NULL;
}
for(i = 0; paths[i] != NULL; i++)
{
snprintf(buf, 2*PATH_MAX, "%s/%s", paths[i], argv0);
if (realpath(buf, exe) == NULL)
continue;
if (access(exe, F_OK | X_OK) == -1)
continue;
self = strdup(exe);
free(argv0);
free(paths);
return self;
}
free(argv0);
free(paths);
return NULL;
}
#elif defined(__OpenBSD__)
#include <sys/param.h>
#include <sys/sysctl.h>
#include <limits.h>
const char * rust_current_exe() {
static char *self = NULL;
if (self == NULL) {
int mib[4];
char **argv = NULL;
size_t argv_len;
/* initialize mib */
mib[0] = CTL_KERN;
mib[1] = KERN_PROC_ARGS;
mib[2] = getpid();
mib[3] = KERN_PROC_ARGV;
/* request KERN_PROC_ARGV size */
argv_len = 0;
if (sysctl(mib, 4, NULL, &argv_len, NULL, 0) == -1)
return (NULL);
/* allocate size */
if ((argv = malloc(argv_len)) == NULL)
return (NULL);
/* request KERN_PROC_ARGV */
if (sysctl(mib, 4, argv, &argv_len, NULL, 0) == -1) {
free(argv);
return (NULL);
}
/* get realpath if possible */
if ((argv[0] != NULL) && ((*argv[0] == '.') || (*argv[0] == '/')
|| (strstr(argv[0], "/") != NULL)))
self = realpath(argv[0], NULL);
else
self = NULL;
/* cleanup */
free(argv);
}
return (self);
}
#endif
#endif // !defined(_WIN32)
//
// Local Variables:
// mode: C++
// fill-column: 78;
// indent-tabs-mode: nil
// c-basic-offset: 4
// buffer-file-coding-system: utf-8-unix
// End:
//