5  * SPDX-License-Identifier:	GPL-2.0+
26  *	entry = name[:attributes]
27  *	list = entry[,list]
30 	int (*callback)(const char *name, const char *attributes, void *priv),  in env_attr_walk()  argument
33 	const char *entry, *entry_end;  in env_attr_walk()  local
34 	char *name, *attributes;  in env_attr_walk()  local
40 	entry = attr_list;  in env_attr_walk()
44 		entry_end = strchr(entry, ENV_ATTR_LIST_DELIM);  in env_attr_walk()
45 		/* check if this is the last entry in the list */  in env_attr_walk()
47 			int entry_len = strlen(entry);  in env_attr_walk()
51 				 * allocate memory to copy the entry into since  in env_attr_walk()
53 				 * white-space before calling the callback  in env_attr_walk()
58 					strcpy(entry_cpy, entry);  in env_attr_walk()
60 					return -ENOMEM;  in env_attr_walk()
63 			int entry_len = entry_end - entry;  in env_attr_walk()
67 				 * allocate memory to copy the entry into since  in env_attr_walk()
69 				 * white-space before calling the callback  in env_attr_walk()
73 					/* copy just this entry and null term */  in env_attr_walk()
74 					strncpy(entry_cpy, entry, entry_len);  in env_attr_walk()
77 					return -ENOMEM;  in env_attr_walk()
86 				/* replace the ':' with '\0' to term name */  in env_attr_walk()
88 				/* remove white-space from attributes */  in env_attr_walk()
91 			/* remove white-space from name */  in env_attr_walk()
92 			name = strim(entry_cpy);  in env_attr_walk()
94 			/* only call the callback if there is a name */  in env_attr_walk()
95 			if (strlen(name) != 0) {  in env_attr_walk()
98 				retval = callback(name, attributes, priv);  in env_attr_walk()
107 		entry = entry_end + 1;  in env_attr_walk()
120 static int regex_callback(const char *name, const char *attributes, void *priv)  in regex_callback()  argument
125 	char regex[strlen(name) + 3];  in regex_callback()
128 	sprintf(regex, "^%s$", name);  in regex_callback()
132 		if (slre_match(&slre, cbp->searched_for,  in regex_callback()
133 			       strlen(cbp->searched_for), caps)) {  in regex_callback()
134 			free(cbp->regex);  in regex_callback()
136 				retval = -EINVAL;  in regex_callback()
139 			cbp->regex = malloc(strlen(regex) + 1);  in regex_callback()
140 			if (cbp->regex) {  in regex_callback()
141 				strcpy(cbp->regex, regex);  in regex_callback()
143 				retval = -ENOMEM;  in regex_callback()
147 			free(cbp->attributes);  in regex_callback()
148 			cbp->attributes = malloc(strlen(attributes) + 1);  in regex_callback()
149 			if (cbp->attributes) {  in regex_callback()
150 				strcpy(cbp->attributes, attributes);  in regex_callback()
152 				retval = -ENOMEM;  in regex_callback()
153 				free(cbp->regex);  in regex_callback()
154 				cbp->regex = NULL;  in regex_callback()
160 		retval = -EINVAL;  in regex_callback()
167  * Retrieve the attributes string associated with a single name in the list
170 int env_attr_lookup(const char *attr_list, const char *name, char *attributes)  in env_attr_lookup()  argument
174 		return -EINVAL;  in env_attr_lookup()
177 		return -EINVAL;  in env_attr_lookup()
182 	priv.searched_for = name;  in env_attr_lookup()
196 	return -ENOENT; /* not found in list */  in env_attr_lookup()
201  * Search for the last exactly matching name in an attribute list
227 		prevch = match - 1;  in reverse_name_search()
232 			prevch--;  in reverse_name_search()
241 		    prevch != searched - 1)  in reverse_name_search()
257  * Retrieve the attributes string associated with a single name in the list
260 int env_attr_lookup(const char *attr_list, const char *name, char *attributes)  in env_attr_lookup()  argument
262 	const char *entry = NULL;  in env_attr_lookup()  local
267 		return -EINVAL;  in env_attr_lookup()
270 		return -EINVAL;  in env_attr_lookup()
272 	entry_len = reverse_name_search(attr_list, name, &entry);  in env_attr_lookup()
273 	if (entry != NULL) {  in env_attr_lookup()
276 		/* skip the name */  in env_attr_lookup()
277 		entry += entry_len;  in env_attr_lookup()
279 		while (*entry == ' ')  in env_attr_lookup()
280 			entry++;  in env_attr_lookup()
281 		if (*entry != ENV_ATTR_SEP)  in env_attr_lookup()
289 			entry += 1;  in env_attr_lookup()
291 			while (*entry == ' ')  in env_attr_lookup()
292 				entry++;  in env_attr_lookup()
294 			delim = strpbrk(entry, delims);  in env_attr_lookup()
296 				len = strlen(entry);  in env_attr_lookup()
298 				len = delim - entry;  in env_attr_lookup()
299 			memcpy(attributes, entry, len);  in env_attr_lookup()
308 	return -ENOENT;  in env_attr_lookup()