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author | Magnus Ahltorp <map@kth.se> | 2014-09-27 23:34:58 +0200 |
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committer | Magnus Ahltorp <map@kth.se> | 2014-09-27 23:34:58 +0200 |
commit | 54ce1162dc56e02f2e086e7bd34b97b57604e7a4 (patch) | |
tree | 3be1b442e896a39f894d639528bd494048061d6b /src/atomic.erl | |
parent | c3111912df87159d1c3bccac351f614a25a3c553 (diff) | |
parent | 9c0d01c3059a7f82ac9acd5574755feed2f351a8 (diff) |
Merge branch 'fsync3' into fsync4
Diffstat (limited to 'src/atomic.erl')
-rw-r--r-- | src/atomic.erl | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/atomic.erl b/src/atomic.erl new file mode 100644 index 0000000..5bf5670 --- /dev/null +++ b/src/atomic.erl @@ -0,0 +1,24 @@ +%% +%% Copyright (c) 2014 Kungliga Tekniska Högskolan +%% (KTH Royal Institute of Technology, Stockholm, Sweden). +%% + +-module(atomic). +-export([replacefile/2, readfile/1]). + +-spec replacefile(string(), binary()) -> ok. +replacefile(Path, Content) -> + TempName = util:tempfilename(Path), + util:write_tempfile_and_rename(Path, TempName, Content), + util:fsync([Path, filename:dirname(Path)]). + +-spec readfile(string()) -> binary(). +readfile(Path) -> + case file:read_file(Path) of + {ok, Contents} -> + Contents; + {error, enoent} -> + noentry; + {error, Error} -> + util:exit_with_error(readfile, Error, "Error reading file") + end. |