use crate::os::unix::prelude::*;
+use crate::convert::TryFrom;
use crate::error::Error as StdError;
use crate::ffi::{CStr, CString, OsStr, OsString};
use crate::fmt;
use crate::slice;
use crate::str;
use crate::sync::{PoisonError, RwLock};
+use crate::sys::common::small_c_string::{run_path_with_cstr, run_with_cstr};
use crate::sys::cvt;
use crate::sys::fd;
use crate::sys::memchr;
#[cfg(not(target_os = "espidf"))]
pub fn chdir(p: &path::Path) -> io::Result<()> {
- let p: &OsStr = p.as_ref();
- let p = CString::new(p.as_bytes())?;
- if unsafe { libc::chdir(p.as_ptr()) } != 0 {
- return Err(io::Error::last_os_error());
- }
- Ok(())
+ let result = run_path_with_cstr(p, |p| unsafe { Ok(libc::chdir(p.as_ptr())) })?;
+ if result == 0 { Ok(()) } else { Err(io::Error::last_os_error()) }
}
pub struct SplitPaths<'a> {
pub fn getenv(k: &OsStr) -> Option<OsString> {
// environment variables with a nul byte can't be set, so their value is
// always None as well
- let k = CString::new(k.as_bytes()).ok()?;
- unsafe {
+ let s = run_with_cstr(k.as_bytes(), |k| {
let _guard = env_read_lock();
- let s = libc::getenv(k.as_ptr()) as *const libc::c_char;
- if s.is_null() {
- None
- } else {
- Some(OsStringExt::from_vec(CStr::from_ptr(s).to_bytes().to_vec()))
- }
+ Ok(unsafe { libc::getenv(k.as_ptr()) } as *const libc::c_char)
+ })
+ .ok()?;
+ if s.is_null() {
+ None
+ } else {
+ Some(OsStringExt::from_vec(unsafe { CStr::from_ptr(s) }.to_bytes().to_vec()))
}
}
pub fn setenv(k: &OsStr, v: &OsStr) -> io::Result<()> {
- let k = CString::new(k.as_bytes())?;
- let v = CString::new(v.as_bytes())?;
-
- unsafe {
- let _guard = ENV_LOCK.write();
- cvt(libc::setenv(k.as_ptr(), v.as_ptr(), 1)).map(drop)
- }
+ run_with_cstr(k.as_bytes(), |k| {
+ run_with_cstr(v.as_bytes(), |v| {
+ let _guard = ENV_LOCK.write();
+ cvt(unsafe { libc::setenv(k.as_ptr(), v.as_ptr(), 1) }).map(drop)
+ })
+ })
}
pub fn unsetenv(n: &OsStr) -> io::Result<()> {
- let nbuf = CString::new(n.as_bytes())?;
-
- unsafe {
+ run_with_cstr(n.as_bytes(), |nbuf| {
let _guard = ENV_LOCK.write();
- cvt(libc::unsetenv(nbuf.as_ptr())).map(drop)
- }
+ cvt(unsafe { libc::unsetenv(nbuf.as_ptr()) }).map(drop)
+ })
}
#[cfg(not(target_os = "espidf"))]