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FileStream: Forbid seek(.) or truncate(.) when appending to a file

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Those functions do not work for files opened for appending. Make this clear.
This commit is contained in:
v1ne 2019-07-26 00:27:50 +02:00
parent 3ebb065509
commit ce9faec1c1
1 changed files with 3 additions and 0 deletions
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3
source/vibe/core/file.d
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@ -472,6 +472,7 @@ struct FileStream {
void seek(ulong offset) void seek(ulong offset)
{ {
enforce(ctx.mode != FileMode.append, "File opened for appending, not random access. Cannot seek.");
ctx.ptr = offset; ctx.ptr = offset;
} }
@ -479,6 +480,8 @@ struct FileStream {
void truncate(ulong size) void truncate(ulong size)
{ {
enforce(ctx.mode != FileMode.append, "File opened for appending, not random access. Cannot truncate.");
auto res = asyncAwaitUninterruptible!(FileIOCallback, auto res = asyncAwaitUninterruptible!(FileIOCallback,
cb => eventDriver.files.truncate(m_fd, size, cb) cb => eventDriver.files.truncate(m_fd, size, cb)
); );