commit 0da40bba8858337c27b4ca0e40e0d9be00df9131 Author: Nick Mathewson nickm@torproject.org Date: Thu May 24 11:07:01 2012 -0400

Abort writing cached-microdescs if a failed write has occurred.

Bug 2954; fix on 0.2.2.6-alpha. --- changes/bug2954_more | 4 ++++ src/or/microdesc.c | 14 ++++++++++---- 2 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/changes/bug2954_more b/changes/bug2954_more new file mode 100644 index 0000000..68fdf13 --- /dev/null +++ b/changes/bug2954_more @@ -0,0 +1,4 @@ + o Minor bugfixes: + - If we fail to write a microdescriptor to disk, do not continue + replacing the old microdescriptor file. Fix for bug 2954; bugfix + on 0.2.2.6-alpha. diff --git a/src/or/microdesc.c b/src/or/microdesc.c index be9b997..59b7d7b 100644 --- a/src/or/microdesc.c +++ b/src/or/microdesc.c @@ -80,7 +80,12 @@ dump_microdescriptor(FILE *f, microdesc_t *md, size_t *annotation_len_out) char annotation[ISO_TIME_LEN+32]; format_iso_time(buf, md->last_listed); tor_snprintf(annotation, sizeof(annotation), "@last-listed %s\n", buf); - fputs(annotation, f); + if (fputs(annotation, f) < 0) { + log_warn(LD_DIR, + "Couldn't write microdescriptor annotation: %s", + strerror(ferror(f))); + return -1; + } r += strlen(annotation); *annotation_len_out = r; } else { @@ -226,9 +231,10 @@ microdescs_add_list_to_cache(microdesc_cache_t *cache, size_t annotation_len; size = dump_microdescriptor(f, md, &annotation_len); if (size < 0) { - /* XXX handle errors from dump_microdescriptor() */ - /* log? return -1? die? coredump the universe? */ - continue; + /* we already warned in dump_microdescriptor; */ + abort_writing_to_file(open_file); + smartlist_clear(added); + return added; } md->saved_location = SAVED_IN_JOURNAL; cache->journal_len += size;