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-rw-r--r--trace2/tr2_cfg.c58
-rw-r--r--trace2/tr2_cfg.h8
-rw-r--r--trace2/tr2_sysenv.c2
-rw-r--r--trace2/tr2_sysenv.h1
4 files changed, 69 insertions, 0 deletions
diff --git a/trace2/tr2_cfg.c b/trace2/tr2_cfg.c
index caa7f06948..ec9ac1a6ef 100644
--- a/trace2/tr2_cfg.c
+++ b/trace2/tr2_cfg.c
@@ -7,6 +7,10 @@ static struct strbuf **tr2_cfg_patterns;
static int tr2_cfg_count_patterns;
static int tr2_cfg_loaded;
+static struct strbuf **tr2_cfg_env_vars;
+static int tr2_cfg_env_vars_count;
+static int tr2_cfg_env_vars_loaded;
+
/*
* Parse a string containing a comma-delimited list of config keys
* or wildcard patterns into a list of strbufs.
@@ -46,6 +50,45 @@ void tr2_cfg_free_patterns(void)
tr2_cfg_loaded = 0;
}
+/*
+ * Parse a string containing a comma-delimited list of environment variable
+ * names into a list of strbufs.
+ */
+static int tr2_load_env_vars(void)
+{
+ struct strbuf **s;
+ const char *varlist;
+
+ if (tr2_cfg_env_vars_loaded)
+ return tr2_cfg_env_vars_count;
+ tr2_cfg_env_vars_loaded = 1;
+
+ varlist = tr2_sysenv_get(TR2_SYSENV_ENV_VARS);
+ if (!varlist || !*varlist)
+ return tr2_cfg_env_vars_count;
+
+ tr2_cfg_env_vars = strbuf_split_buf(varlist, strlen(varlist), ',', -1);
+ for (s = tr2_cfg_env_vars; *s; s++) {
+ struct strbuf *buf = *s;
+
+ if (buf->len && buf->buf[buf->len - 1] == ',')
+ strbuf_setlen(buf, buf->len - 1);
+ strbuf_trim_trailing_newline(*s);
+ strbuf_trim(*s);
+ }
+
+ tr2_cfg_env_vars_count = s - tr2_cfg_env_vars;
+ return tr2_cfg_env_vars_count;
+}
+
+void tr2_cfg_free_env_vars(void)
+{
+ if (tr2_cfg_env_vars)
+ strbuf_list_free(tr2_cfg_env_vars);
+ tr2_cfg_env_vars_count = 0;
+ tr2_cfg_env_vars_loaded = 0;
+}
+
struct tr2_cfg_data {
const char *file;
int line;
@@ -79,6 +122,21 @@ void tr2_cfg_list_config_fl(const char *file, int line)
read_early_config(tr2_cfg_cb, &data);
}
+void tr2_list_env_vars_fl(const char *file, int line)
+{
+ struct strbuf **s;
+
+ if (tr2_load_env_vars() <= 0)
+ return;
+
+ for (s = tr2_cfg_env_vars; *s; s++) {
+ struct strbuf *buf = *s;
+ const char *val = getenv(buf->buf);
+ if (val && *val)
+ trace2_def_param_fl(file, line, buf->buf, val);
+ }
+}
+
void tr2_cfg_set_fl(const char *file, int line, const char *key,
const char *value)
{
diff --git a/trace2/tr2_cfg.h b/trace2/tr2_cfg.h
index d9c98f64dd..a11d71feb5 100644
--- a/trace2/tr2_cfg.h
+++ b/trace2/tr2_cfg.h
@@ -8,6 +8,12 @@
void tr2_cfg_list_config_fl(const char *file, int line);
/*
+ * Iterate over all "interesting" environment variables and emit 'def_param'
+ * events for them to TRACE2.
+ */
+void tr2_list_env_vars_fl(const char *file, int line);
+
+/*
* Emit a "def_param" event for the given key/value pair IF we consider
* the key to be "interesting".
*/
@@ -16,4 +22,6 @@ void tr2_cfg_set_fl(const char *file, int line, const char *key,
void tr2_cfg_free_patterns(void);
+void tr2_cfg_free_env_vars(void);
+
#endif /* TR2_CFG_H */
diff --git a/trace2/tr2_sysenv.c b/trace2/tr2_sysenv.c
index 3c3792eca2..a380dcf910 100644
--- a/trace2/tr2_sysenv.c
+++ b/trace2/tr2_sysenv.c
@@ -29,6 +29,8 @@ struct tr2_sysenv_entry {
static struct tr2_sysenv_entry tr2_sysenv_settings[] = {
[TR2_SYSENV_CFG_PARAM] = { "GIT_TRACE2_CONFIG_PARAMS",
"trace2.configparams" },
+ [TR2_SYSENV_ENV_VARS] = { "GIT_TRACE2_ENV_VARS",
+ "trace2.envvars" },
[TR2_SYSENV_DST_DEBUG] = { "GIT_TRACE2_DST_DEBUG",
"trace2.destinationdebug" },
diff --git a/trace2/tr2_sysenv.h b/trace2/tr2_sysenv.h
index d4364a7b85..3292ee15bc 100644
--- a/trace2/tr2_sysenv.h
+++ b/trace2/tr2_sysenv.h
@@ -11,6 +11,7 @@
*/
enum tr2_sysenv_variable {
TR2_SYSENV_CFG_PARAM = 0,
+ TR2_SYSENV_ENV_VARS,
TR2_SYSENV_DST_DEBUG,