commit 4fd761a418558c05716b4a04a5306dc67ce53dfe Author: Nick Mathewson nickm@torproject.org Date: Mon Sep 17 11:36:59 2018 -0400
Make CacheDirectoryGroupReadable an autobool.
Since the default cache directory is the same as the default data directory, we don't want the default CacheDirectoryGroupReadable value (0) to override an explicitly set "DataDirectoryGroupReadable 1".
To fix this, I'm making CacheDirectoryGroupReadable into an autobool, and having the default (auto) value mean "Use the value of DataDirectoryGroupReadable if the directories are the same, and 0 otherwise."
Fixes bug 26913; bugfix on 0.3.3.1-alpha when the CacheDirectory option was introduced. --- changes/ticket26913 | 7 +++++++ doc/tor.1.txt | 6 ++++-- src/or/config.c | 21 +++++++++++++++++++-- 3 files changed, 30 insertions(+), 4 deletions(-)
diff --git a/changes/ticket26913 b/changes/ticket26913 new file mode 100644 index 000000000..d6555764e --- /dev/null +++ b/changes/ticket26913 @@ -0,0 +1,7 @@ + o Minor bugfixes (directory permissions): + - When a user requests a group-readable DataDirectory, give it to + them. Previously, when the DataDirectory and the CacheDirectory + were the same, the default setting (0) for + CacheDirectoryGroupReadable would always override the setting for + DataDirectoryGroupReadable. Fixes bug 26913; bugfix on + 0.3.3.1-alpha. diff --git a/doc/tor.1.txt b/doc/tor.1.txt index f89406180..c089bffbb 100644 --- a/doc/tor.1.txt +++ b/doc/tor.1.txt @@ -423,10 +423,12 @@ GENERAL OPTIONS running. (Default: uses the value of DataDirectory.)
-[[CacheDirectoryGroupReadable]] **CacheDirectoryGroupReadable** **0**|**1**:: +[[CacheDirectoryGroupReadable]] **CacheDirectoryGroupReadable** **0**|**1**|**auto**:: If this option is set to 0, don't allow the filesystem group to read the CacheDirectory. If the option is set to 1, make the CacheDirectory readable - by the default GID. (Default: 0) + by the default GID. If the option is "auto", then we use the + setting for DataDirectoryGroupReadable when the CacheDirectory is the + same as the DataDirectory, and 0 otherwise. (Default: auto)
[[FallbackDir]] **FallbackDir** __ipv4address__:__port__ orport=__port__ id=__fingerprint__ [weight=__num__] [ipv6=**[**__ipv6address__**]**:__orport__]:: When we're unable to connect to any directory cache for directory info diff --git a/src/or/config.c b/src/or/config.c index 58080c65e..e50e6efa2 100644 --- a/src/or/config.c +++ b/src/or/config.c @@ -259,7 +259,7 @@ static config_var_t option_vars_[] = { V(BridgeRelay, BOOL, "0"), V(BridgeDistribution, STRING, NULL), VAR("CacheDirectory", FILENAME, CacheDirectory_option, NULL), - V(CacheDirectoryGroupReadable, BOOL, "0"), + V(CacheDirectoryGroupReadable, AUTOBOOL, "auto"), V(CellStatistics, BOOL, "0"), V(PaddingStatistics, BOOL, "1"), V(LearnCircuitBuildTimeout, BOOL, "1"), @@ -1516,9 +1516,26 @@ options_act_reversible(const or_options_t *old_options, char **msg) msg) < 0) { goto done; } + + /* We need to handle the group-readable flag for the cache directory + * specially, since the directory defaults to being the same as the + * DataDirectory. */ + int cache_dir_group_readable; + if (options->CacheDirectoryGroupReadable != -1) { + /* If the user specified a value, use their setting */ + cache_dir_group_readable = options->CacheDirectoryGroupReadable; + } else if (!strcmp(options->CacheDirectory, options->DataDirectory)) { + /* If the user left the value as "auto", and the cache is the same as the + * datadirectory, use the datadirectory setting. + */ + cache_dir_group_readable = options->DataDirectoryGroupReadable; + } else { + /* Otherwise, "auto" means "not group readable". */ + cache_dir_group_readable = 0; + } if (check_and_create_data_directory(running_tor /* create */, options->CacheDirectory, - options->CacheDirectoryGroupReadable, + cache_dir_group_readable, options->User, msg) < 0) { goto done;