1*83d290c5STom Rini /* SPDX-License-Identifier: GPL-2.0+ */ 2170ab110SJoe Hershberger /* 3170ab110SJoe Hershberger * (C) Copyright 2012 4170ab110SJoe Hershberger * Joe Hershberger, National Instruments, joe.hershberger@ni.com 5170ab110SJoe Hershberger */ 6170ab110SJoe Hershberger 7170ab110SJoe Hershberger #ifndef __ENV_ATTR_H__ 8170ab110SJoe Hershberger #define __ENV_ATTR_H__ 9170ab110SJoe Hershberger 10170ab110SJoe Hershberger #define ENV_ATTR_LIST_DELIM ',' 11170ab110SJoe Hershberger #define ENV_ATTR_SEP ':' 12170ab110SJoe Hershberger 13170ab110SJoe Hershberger /* 14170ab110SJoe Hershberger * env_attr_walk takes as input an "attr_list" that takes the form: 15170ab110SJoe Hershberger * attributes = [^,:\s]* 16170ab110SJoe Hershberger * entry = name[:attributes] 17170ab110SJoe Hershberger * list = entry[,list] 18cca98fd6SJoe Hershberger * It will call the "callback" function with the "name" and "attributes" 19170ab110SJoe Hershberger * The callback may return a non-0 to abort the list walk. 20170ab110SJoe Hershberger * This return value will be passed through to the caller. 21170ab110SJoe Hershberger * 0 is returned on success. 22170ab110SJoe Hershberger */ 23cca98fd6SJoe Hershberger int env_attr_walk(const char *attr_list, 24cca98fd6SJoe Hershberger int (*callback)(const char *name, const char *attributes, void *priv), 25cca98fd6SJoe Hershberger void *priv); 26170ab110SJoe Hershberger 27170ab110SJoe Hershberger /* 28170ab110SJoe Hershberger * env_attr_lookup takes as input an "attr_list" with the same form as above. 29170ab110SJoe Hershberger * It also takes as input a "name" to look for. 30170ab110SJoe Hershberger * If the name is found in the list, it's value is copied into "attributes". 31170ab110SJoe Hershberger * There is no protection on attributes being too small for the value. 32170ab110SJoe Hershberger * It returns -1 if attributes is NULL, 1 if "name" is not found, 2 if 33170ab110SJoe Hershberger * "attr_list" is NULL. 34170ab110SJoe Hershberger * Returns 0 on success. 35170ab110SJoe Hershberger */ 36cca98fd6SJoe Hershberger int env_attr_lookup(const char *attr_list, const char *name, char *attributes); 37170ab110SJoe Hershberger 38170ab110SJoe Hershberger #endif /* __ENV_ATTR_H__ */ 39