3 * Copyright (c) 2016 Ted Unangst <tedu@openbsd.org>
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 #include <sys/types.h>
30 envcmp(struct envnode *a, struct envnode *b)
32 return strcmp(a->key, b->key);
34 RB_GENERATE(envtree, envnode, node, envcmp)
37 createenv(char **envp)
42 env = malloc(sizeof(*env));
48 for (i = 0; envp[i] != NULL; i++) {
54 if ((eq = strchr(e, '=')) == NULL || eq == e)
56 node = malloc(sizeof(*node));
59 node->key = strndup(envp[i], eq - e);
60 node->value = strdup(eq + 1);
61 if (!node->key || !node->value)
63 if (RB_FIND(envtree, &env->root, node)) {
64 free((char *)node->key);
65 free((char *)node->value);
68 RB_INSERT(envtree, &env->root, node);
76 flattenenv(struct env *env)
82 envp = reallocarray(NULL, env->count + 1, sizeof(char *));
86 RB_FOREACH(node, envtree, &env->root) {
87 if (asprintf(&envp[i], "%s=%s", node->key, node->value) == -1)
96 copyenv(struct env *orig, struct env *copy, const char **envlist)
98 struct envnode *node, key;
101 for (i = 0; envlist[i]; i++) {
102 key.key = envlist[i];
103 if ((node = RB_FIND(envtree, &orig->root, &key))) {
104 RB_REMOVE(envtree, &orig->root, node);
106 RB_INSERT(envtree, ©->root, node);
113 filterenv(struct env *orig, struct rule *rule)
115 const char *safeset[] = {
116 "DISPLAY", "HOME", "LOGNAME", "MAIL",
117 "PATH", "TERM", "USER", "USERNAME",
120 const char *badset[] = {
125 struct envnode *node, key;
128 if ((rule->options & KEEPENV) && !rule->envlist) {
129 for (i = 0; badset[i]; i++) {
131 if ((node = RB_FIND(envtree, &orig->root, &key))) {
132 RB_REMOVE(envtree, &orig->root, node);
133 free((char *)node->key);
134 free((char *)node->value);
142 copy = malloc(sizeof(*copy));
145 RB_INIT(©->root);
149 copyenv(orig, copy, rule->envlist);
150 copyenv(orig, copy, safeset);