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os: fix off-by-one error in ShellEscapeWriter

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I am truly not sure why the tests never caught this, but I just fell for
the oldest trick in the book
This commit is contained in:
Leah Amelia Chen
2025-12-07 13:35:52 +08:00
parent 08c9661683
commit ed1d77d518
1 changed files with 1 additions and 3 deletions
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4
src/os/shell.zig
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@@ -5,8 +5,6 @@ const Writer = std.Io.Writer;
/// Writer that escapes characters that shells treat specially to reduce the
/// risk of injection attacks or other such weirdness. Specifically excludes
/// linefeeds so that they can be used to delineate lists of file paths.
///
/// T should be a Zig type that follows the `std.Io.Writer` interface.
pub const ShellEscapeWriter = struct {
writer: Writer,
child: *Writer,
@@ -33,7 +31,7 @@ pub const ShellEscapeWriter = struct {
var count: usize = 0;
for (data[0 .. data.len - 1]) |chunk| try self.writeEscaped(chunk, &count);
for (0..splat) |_| try self.writeEscaped(data[data.len], &count);
for (0..splat) |_| try self.writeEscaped(data[data.len - 1], &count);
return count;
}