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Check the presence of linkat() on Solaris (not available in version 10, available in version 11)

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This commit is contained in:
Daniel Laügt 2023-03-22 11:06:08 +01:00
parent 7e21b417d4
commit f0aa3c6354
1 changed files with 6 additions and 5 deletions
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11
library/std/src/sys/unix/fs.rs
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@ -33,7 +33,7 @@ use crate::sys_common::{AsInner, AsInnerMut, FromInner, IntoInner};
target_os = "watchos",
))]
use crate::sys::weak::syscall;
#[cfg(any(target_os = "android", target_os = "macos"))]
#[cfg(any(target_os = "android", target_os = "macos", target_os = "solaris"))]
use crate::sys::weak::weak;
use libc::{c_int, mode_t};
@ -42,6 +42,7 @@ use libc::{c_int, mode_t};
target_os = "macos",
target_os = "ios",
target_os = "watchos",
target_os = "solaris",
all(target_os = "linux", target_env = "gnu")
))]
use libc::c_char;
@ -1423,15 +1424,15 @@ pub fn link(original: &Path, link: &Path) -> io::Result<()> {
run_path_with_cstr(original, |original| {
run_path_with_cstr(link, |link| {
cfg_if::cfg_if! {
if #[cfg(any(target_os = "vxworks", target_os = "redox", target_os = "android", target_os = "espidf", target_os = "horizon", target_os = "solaris"))] {
// VxWorks, Redox, ESP-IDF and Solaris lack `linkat`, so use `link` instead. POSIX leaves
if #[cfg(any(target_os = "vxworks", target_os = "redox", target_os = "android", target_os = "espidf", target_os = "horizon"))] {
// VxWorks, Redox and ESP-IDF lack `linkat`, so use `link` instead. POSIX leaves
// it implementation-defined whether `link` follows symlinks, so rely on the
// `symlink_hard_link` test in library/std/src/fs/tests.rs to check the behavior.
// Android has `linkat` on newer versions, but we happen to know `link`
// always has the correct behavior, so it's here as well.
cvt(unsafe { libc::link(original.as_ptr(), link.as_ptr()) })?;
} else if #[cfg(target_os = "macos")] {
// On MacOS, older versions (<=10.9) lack support for linkat while newer
} else if #[cfg(any(target_os = "macos", target_os = "solaris"))] {
// MacOS (<=10.9) and Solaris 10 lack support for linkat while newer
// versions have it. We want to use linkat if it is available, so we use weak!
// to check. `linkat` is preferable to `link` because it gives us a flag to
// specify how symlinks should be handled. We pass 0 as the flags argument,