diff options
| -rw-r--r-- | nix/libutil/util.cc | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/nix/libutil/util.cc b/nix/libutil/util.cc index 7998664ed0..410d0f2830 100644 --- a/nix/libutil/util.cc +++ b/nix/libutil/util.cc @@ -193,8 +193,12 @@ Path readLink(const Path & path) if (!S_ISLNK(st.st_mode)) throw Error(format("`%1%' is not a symlink") % path); char buf[st.st_size]; - if (readlink(path.c_str(), buf, st.st_size) != st.st_size) - throw SysError(format("reading symbolic link `%1%'") % path); + ssize_t rlsize = readlink(path.c_str(), buf, st.st_size); + if (rlsize == -1) + throw SysError(format("reading symbolic link '%1%'") % path); + else if (rlsize != st.st_size) + throw Error(format("symbolic link '%1%' size mismatch %2% != %3%") + % path % rlsize % st.st_size); return string(buf, st.st_size); } |