+/*
+ * Walk the directories in the PATH environment variable to find the target
+ * binary passed as parameter.
+ *
+ * On success, the full path of the binary is copied in binary_full_path out
+ * parameter. This buffer is allocated by the caller and must be at least
+ * LTTNG_PATH_MAX bytes long.
+ * On failure, returns -1;
+ */
+static int walk_command_search_path(const char *binary, char *binary_full_path)
+{
+ char *tentative_binary_path = NULL;
+ char *command_search_path = NULL;
+ char *curr_search_dir_end = NULL;
+ char *curr_search_dir = NULL;
+ struct stat stat_output;
+ int ret = 0;
+
+ command_search_path = lttng_secure_getenv("PATH");
+ if (!command_search_path) {
+ ret = -1;
+ goto end;
+ }
+
+ /*
+ * Duplicate the $PATH string as the char pointer returned by getenv() should
+ * not be modified.
+ */
+ command_search_path = strdup(command_search_path);
+ if (!command_search_path) {
+ ret = -1;
+ goto end;
+ }
+
+ /*
+ * This char array is used to concatenate path to binary to look for
+ * the binary.
+ */
+ tentative_binary_path = zmalloc(LTTNG_PATH_MAX * sizeof(char));
+ if (!tentative_binary_path) {
+ ret = -1;
+ goto alloc_error;
+ }
+
+ curr_search_dir = command_search_path;
+ do {
+ /*
+ * Split on ':'. The return value of this call points to the
+ * matching character.
+ */
+ curr_search_dir_end = strchr(curr_search_dir, ':');
+ if (curr_search_dir_end != NULL) {
+ /*
+ * Add a NULL byte to the end of the first token so it
+ * can be used as a string.
+ */
+ curr_search_dir_end[0] = '\0';
+ }
+
+ /* Empty the tentative path */
+ memset(tentative_binary_path, 0, LTTNG_PATH_MAX * sizeof(char));
+
+ /*
+ * Build the tentative path to the binary using the current
+ * search directory and the name of the binary.
+ */
+ ret = snprintf(tentative_binary_path, LTTNG_PATH_MAX, "%s/%s",
+ curr_search_dir, binary);
+ if (ret < 0) {
+ goto free_binary_path;
+ }
+ if (ret < LTTNG_PATH_MAX) {
+ /*
+ * Use STAT(2) to see if the file exists.
+ */
+ ret = stat(tentative_binary_path, &stat_output);
+ if (ret == 0) {
+ /*
+ * Verify that it is a regular file or a
+ * symlink and not a special file (e.g.
+ * device).
+ */
+ if (S_ISREG(stat_output.st_mode)
+ || S_ISLNK(stat_output.st_mode)) {
+ /*
+ * Found a match, set the out parameter
+ * and return success.
+ */
+ ret = lttng_strncpy(binary_full_path,
+ tentative_binary_path,
+ LTTNG_PATH_MAX);
+ if (ret == -1) {
+ ERR("Source path does not fit "
+ "in destination buffer.");
+ }
+ goto free_binary_path;
+ }
+ }
+ }
+ /* Go to the next entry in the $PATH variable. */
+ curr_search_dir = curr_search_dir_end + 1;
+ } while (curr_search_dir_end != NULL);
+
+free_binary_path:
+ free(tentative_binary_path);
+alloc_error:
+ free(command_search_path);
+end:
+ return ret;
+}
+
+/*
+ * Maps LOG4j loglevel from string to value
+ */
+static int loglevel_log4j_str_to_value(const char *inputstr)
+{
+ int i = 0;
+ char str[LTTNG_SYMBOL_NAME_LEN];
+
+ if (!inputstr || strlen(inputstr) == 0) {
+ return -1;
+ }
+
+ /*
+ * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is
+ * added at the end of the loop so a the upper bound we avoid the overflow.
+ */
+ while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') {
+ str[i] = toupper(inputstr[i]);
+ i++;
+ }
+ str[i] = '\0';
+
+ if (!strcmp(str, "LOG4J_OFF") || !strcmp(str, "OFF")) {
+ return LTTNG_LOGLEVEL_LOG4J_OFF;
+ } else if (!strcmp(str, "LOG4J_FATAL") || !strcmp(str, "FATAL")) {
+ return LTTNG_LOGLEVEL_LOG4J_FATAL;
+ } else if (!strcmp(str, "LOG4J_ERROR") || !strcmp(str, "ERROR")) {
+ return LTTNG_LOGLEVEL_LOG4J_ERROR;
+ } else if (!strcmp(str, "LOG4J_WARN") || !strcmp(str, "WARN")) {
+ return LTTNG_LOGLEVEL_LOG4J_WARN;
+ } else if (!strcmp(str, "LOG4J_INFO") || !strcmp(str, "INFO")) {
+ return LTTNG_LOGLEVEL_LOG4J_INFO;
+ } else if (!strcmp(str, "LOG4J_DEBUG") || !strcmp(str, "DEBUG")) {
+ return LTTNG_LOGLEVEL_LOG4J_DEBUG;
+ } else if (!strcmp(str, "LOG4J_TRACE") || !strcmp(str, "TRACE")) {
+ return LTTNG_LOGLEVEL_LOG4J_TRACE;
+ } else if (!strcmp(str, "LOG4J_ALL") || !strcmp(str, "ALL")) {
+ return LTTNG_LOGLEVEL_LOG4J_ALL;
+ } else {
+ return -1;
+ }
+}
+
+/*
+ * Maps JUL loglevel from string to value
+ */
+static int loglevel_jul_str_to_value(const char *inputstr)
+{
+ int i = 0;
+ char str[LTTNG_SYMBOL_NAME_LEN];
+
+ if (!inputstr || strlen(inputstr) == 0) {
+ return -1;
+ }
+
+ /*
+ * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is
+ * added at the end of the loop so a the upper bound we avoid the overflow.
+ */
+ while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') {
+ str[i] = toupper(inputstr[i]);
+ i++;
+ }
+ str[i] = '\0';
+
+ if (!strcmp(str, "JUL_OFF") || !strcmp(str, "OFF")) {
+ return LTTNG_LOGLEVEL_JUL_OFF;
+ } else if (!strcmp(str, "JUL_SEVERE") || !strcmp(str, "SEVERE")) {
+ return LTTNG_LOGLEVEL_JUL_SEVERE;
+ } else if (!strcmp(str, "JUL_WARNING") || !strcmp(str, "WARNING")) {
+ return LTTNG_LOGLEVEL_JUL_WARNING;
+ } else if (!strcmp(str, "JUL_INFO") || !strcmp(str, "INFO")) {
+ return LTTNG_LOGLEVEL_JUL_INFO;
+ } else if (!strcmp(str, "JUL_CONFIG") || !strcmp(str, "CONFIG")) {
+ return LTTNG_LOGLEVEL_JUL_CONFIG;
+ } else if (!strcmp(str, "JUL_FINE") || !strcmp(str, "FINE")) {
+ return LTTNG_LOGLEVEL_JUL_FINE;
+ } else if (!strcmp(str, "JUL_FINER") || !strcmp(str, "FINER")) {
+ return LTTNG_LOGLEVEL_JUL_FINER;
+ } else if (!strcmp(str, "JUL_FINEST") || !strcmp(str, "FINEST")) {
+ return LTTNG_LOGLEVEL_JUL_FINEST;
+ } else if (!strcmp(str, "JUL_ALL") || !strcmp(str, "ALL")) {
+ return LTTNG_LOGLEVEL_JUL_ALL;
+ } else {
+ return -1;
+ }
+}
+
+/*
+ * Maps Python loglevel from string to value
+ */
+static int loglevel_python_str_to_value(const char *inputstr)
+{
+ int i = 0;
+ char str[LTTNG_SYMBOL_NAME_LEN];
+
+ if (!inputstr || strlen(inputstr) == 0) {
+ return -1;
+ }
+
+ /*
+ * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is
+ * added at the end of the loop so a the upper bound we avoid the overflow.
+ */
+ while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') {
+ str[i] = toupper(inputstr[i]);
+ i++;
+ }
+ str[i] = '\0';
+
+ if (!strcmp(str, "PYTHON_CRITICAL") || !strcmp(str, "CRITICAL")) {
+ return LTTNG_LOGLEVEL_PYTHON_CRITICAL;
+ } else if (!strcmp(str, "PYTHON_ERROR") || !strcmp(str, "ERROR")) {
+ return LTTNG_LOGLEVEL_PYTHON_ERROR;
+ } else if (!strcmp(str, "PYTHON_WARNING") || !strcmp(str, "WARNING")) {
+ return LTTNG_LOGLEVEL_PYTHON_WARNING;
+ } else if (!strcmp(str, "PYTHON_INFO") || !strcmp(str, "INFO")) {
+ return LTTNG_LOGLEVEL_PYTHON_INFO;
+ } else if (!strcmp(str, "PYTNON_DEBUG") || !strcmp(str, "DEBUG")) {
+ return LTTNG_LOGLEVEL_PYTHON_DEBUG;
+ } else if (!strcmp(str, "PYTHON_NOTSET") || !strcmp(str, "NOTSET")) {
+ return LTTNG_LOGLEVEL_PYTHON_NOTSET;
+ } else {
+ return -1;
+ }
+}
+