diff options
Diffstat (limited to 'build2/depdb.cxx')
-rw-r--r-- | build2/depdb.cxx | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/build2/depdb.cxx b/build2/depdb.cxx index f89daba..c963387 100644 --- a/build2/depdb.cxx +++ b/build2/depdb.cxx @@ -117,7 +117,9 @@ namespace build2 if (trunc) fdtruncate (fd.get (), pos_); - // Note: seek is required to switch from reading to writing. + // Note: the file descriptor position can be beyond the pos_ value due to + // the ifdstream buffering. That's why we need to seek to switch from + // reading to writing. // fdseek (fd.get (), pos_, fdseek_mode::set); |