1 // SPDX-License-Identifier: GPL-2.0+
25  *	entry = name[:attributes]
26  *	list = entry[,list]
29 	int (*callback)(const char *name, const char *attributes, void *priv),  in env_attr_walk()  argument
32 	const char *entry, *entry_end;  in env_attr_walk()  local
33 	char *name, *attributes;  in env_attr_walk()  local
39 	entry = attr_list;  in env_attr_walk()
43 		entry_end = strchr(entry, ENV_ATTR_LIST_DELIM);  in env_attr_walk()
44 		/* check if this is the last entry in the list */  in env_attr_walk()
46 			int entry_len = strlen(entry);  in env_attr_walk()
50 				 * allocate memory to copy the entry into since  in env_attr_walk()
52 				 * white-space before calling the callback  in env_attr_walk()
57 					strcpy(entry_cpy, entry);  in env_attr_walk()
59 					return -ENOMEM;  in env_attr_walk()
62 			int entry_len = entry_end - entry;  in env_attr_walk()
66 				 * allocate memory to copy the entry into since  in env_attr_walk()
68 				 * white-space before calling the callback  in env_attr_walk()
72 					/* copy just this entry and null term */  in env_attr_walk()
73 					strncpy(entry_cpy, entry, entry_len);  in env_attr_walk()
76 					return -ENOMEM;  in env_attr_walk()
85 				/* replace the ':' with '\0' to term name */  in env_attr_walk()
87 				/* remove white-space from attributes */  in env_attr_walk()
90 			/* remove white-space from name */  in env_attr_walk()
91 			name = strim(entry_cpy);  in env_attr_walk()
93 			/* only call the callback if there is a name */  in env_attr_walk()
94 			if (strlen(name) != 0) {  in env_attr_walk()
97 				retval = callback(name, attributes, priv);  in env_attr_walk()
106 		entry = entry_end + 1;  in env_attr_walk()
119 static int regex_callback(const char *name, const char *attributes, void *priv)  in regex_callback()  argument
124 	char regex[strlen(name) + 3];  in regex_callback()
127 	sprintf(regex, "^%s$", name);  in regex_callback()
131 		if (slre_match(&slre, cbp->searched_for,  in regex_callback()
132 			       strlen(cbp->searched_for), caps)) {  in regex_callback()
133 			free(cbp->regex);  in regex_callback()
135 				retval = -EINVAL;  in regex_callback()
138 			cbp->regex = malloc(strlen(regex) + 1);  in regex_callback()
139 			if (cbp->regex) {  in regex_callback()
140 				strcpy(cbp->regex, regex);  in regex_callback()
142 				retval = -ENOMEM;  in regex_callback()
146 			free(cbp->attributes);  in regex_callback()
147 			cbp->attributes = malloc(strlen(attributes) + 1);  in regex_callback()
148 			if (cbp->attributes) {  in regex_callback()
149 				strcpy(cbp->attributes, attributes);  in regex_callback()
151 				retval = -ENOMEM;  in regex_callback()
152 				free(cbp->regex);  in regex_callback()
153 				cbp->regex = NULL;  in regex_callback()
159 		retval = -EINVAL;  in regex_callback()
166  * Retrieve the attributes string associated with a single name in the list
169 int env_attr_lookup(const char *attr_list, const char *name, char *attributes)  in env_attr_lookup()  argument
173 		return -EINVAL;  in env_attr_lookup()
176 		return -EINVAL;  in env_attr_lookup()
181 	priv.searched_for = name;  in env_attr_lookup()
195 	return -ENOENT; /* not found in list */  in env_attr_lookup()
200  * Search for the last exactly matching name in an attribute list
226 		prevch = match - 1;  in reverse_name_search()
231 			prevch--;  in reverse_name_search()
240 		    prevch != searched - 1)  in reverse_name_search()
256  * Retrieve the attributes string associated with a single name in the list
259 int env_attr_lookup(const char *attr_list, const char *name, char *attributes)  in env_attr_lookup()  argument
261 	const char *entry = NULL;  in env_attr_lookup()  local
266 		return -EINVAL;  in env_attr_lookup()
269 		return -EINVAL;  in env_attr_lookup()
271 	entry_len = reverse_name_search(attr_list, name, &entry);  in env_attr_lookup()
272 	if (entry != NULL) {  in env_attr_lookup()
275 		/* skip the name */  in env_attr_lookup()
276 		entry += entry_len;  in env_attr_lookup()
278 		while (*entry == ' ')  in env_attr_lookup()
279 			entry++;  in env_attr_lookup()
280 		if (*entry != ENV_ATTR_SEP)  in env_attr_lookup()
288 			entry += 1;  in env_attr_lookup()
290 			while (*entry == ' ')  in env_attr_lookup()
291 				entry++;  in env_attr_lookup()
293 			delim = strpbrk(entry, delims);  in env_attr_lookup()
295 				len = strlen(entry);  in env_attr_lookup()
297 				len = delim - entry;  in env_attr_lookup()
298 			memcpy(attributes, entry, len);  in env_attr_lookup()
307 	return -ENOENT;  in env_attr_lookup()