mirror/zig
1
0
Fork 0
mirror of https://github.com/ziglang/zig.git synced 2025-12-29 09:33:18 +00:00
Code Issues Packages Projects Releases Wiki Activity

std.posix: untangle getRandomBytesDevURandom from Io.Reader

Browse Source
This commit is contained in:
Andrew Kelley 2025-10-19 22:31:52 -07:00
parent 97bde94e36
commit 894cb5a1fc
1 changed files with 9 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
lib/std/posix.zig
View File

@ -666,18 +666,22 @@ pub fn getrandom(buffer: []u8) GetRandomError!void {
return getRandomBytesDevURandom(buffer); return getRandomBytesDevURandom(buffer);
} }
fn getRandomBytesDevURandom(buf: []u8) !void { fn getRandomBytesDevURandom(buf: []u8) GetRandomError!void {
const fd = try openZ("/dev/urandom", .{ .ACCMODE = .RDONLY, .CLOEXEC = true }, 0); const fd = try openZ("/dev/urandom", .{ .ACCMODE = .RDONLY, .CLOEXEC = true }, 0);
defer close(fd); defer close(fd);
const st = try fstat(fd); const st = fstat(fd) catch |err| switch (err) {
error.Streaming => return error.NoDevice,
else => |e| return e,
};
if (!S.ISCHR(st.mode)) { if (!S.ISCHR(st.mode)) {
return error.NoDevice; return error.NoDevice;
} }
const file: fs.File = .{ .handle = fd }; var i: usize = 0;
var file_reader = file.readerStreaming(&.{}); while (i < buf.len) {
file_reader.interface.readSliceAll(buf) catch return error.Unexpected; i += read(fd, buf[i..]) catch return error.Unexpected;
}
} }
/// Causes abnormal process termination. /// Causes abnormal process termination.