diff options
Diffstat (limited to 'src/libutil')
| -rw-r--r-- | src/libutil/util.cc | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/libutil/util.cc b/src/libutil/util.cc index dcdb438e0..879f9fb5f 100644 --- a/src/libutil/util.cc +++ b/src/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) + 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); } |