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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:22:09 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:22:09 +0000
commit43a97878ce14b72f0981164f87f2e35e14151312 (patch)
tree620249daf56c0258faa40cbdcf9cfba06de2a846 /third_party/rust/tempfile/src/util.rs
parentInitial commit. (diff)
downloadfirefox-43a97878ce14b72f0981164f87f2e35e14151312.tar.xz
firefox-43a97878ce14b72f0981164f87f2e35e14151312.zip
Adding upstream version 110.0.1.upstream/110.0.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'third_party/rust/tempfile/src/util.rs')
-rw-r--r--third_party/rust/tempfile/src/util.rs48
1 files changed, 48 insertions, 0 deletions
diff --git a/third_party/rust/tempfile/src/util.rs b/third_party/rust/tempfile/src/util.rs
new file mode 100644
index 0000000000..8c91b9c69f
--- /dev/null
+++ b/third_party/rust/tempfile/src/util.rs
@@ -0,0 +1,48 @@
+use fastrand;
+use std::ffi::{OsStr, OsString};
+use std::path::{Path, PathBuf};
+use std::{io, iter::repeat_with};
+
+use crate::error::IoResultExt;
+
+fn tmpname(prefix: &OsStr, suffix: &OsStr, rand_len: usize) -> OsString {
+ let mut buf = OsString::with_capacity(prefix.len() + suffix.len() + rand_len);
+ buf.push(prefix);
+ let mut char_buf = [0u8; 4];
+ for c in repeat_with(fastrand::alphanumeric).take(rand_len) {
+ buf.push(c.encode_utf8(&mut char_buf));
+ }
+ buf.push(suffix);
+ buf
+}
+
+pub fn create_helper<F, R>(
+ base: &Path,
+ prefix: &OsStr,
+ suffix: &OsStr,
+ random_len: usize,
+ f: F,
+) -> io::Result<R>
+where
+ F: Fn(PathBuf) -> io::Result<R>,
+{
+ let num_retries = if random_len != 0 {
+ crate::NUM_RETRIES
+ } else {
+ 1
+ };
+
+ for _ in 0..num_retries {
+ let path = base.join(tmpname(prefix, suffix, random_len));
+ return match f(path) {
+ Err(ref e) if e.kind() == io::ErrorKind::AlreadyExists => continue,
+ res => res,
+ };
+ }
+
+ Err(io::Error::new(
+ io::ErrorKind::AlreadyExists,
+ "too many temporary files exist",
+ ))
+ .with_err_path(|| base)
+}