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-rw-r--r--usr.bin/tmux/environ.c147
1 files changed, 147 insertions, 0 deletions
diff --git a/usr.bin/tmux/environ.c b/usr.bin/tmux/environ.c
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+++ b/usr.bin/tmux/environ.c
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+/* $OpenBSD: environ.c,v 1.1 2009/08/08 21:52:43 nicm Exp $ */
+
+/*
+ * Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
+ * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/types.h>
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "tmux.h"
+
+/*
+ * Environment - manipulate a set of environment variables.
+ */
+
+RB_GENERATE(environ, environ_entry, entry, environ_cmp);
+
+void environ_set1(struct environ *, char *, char *);
+
+int
+environ_cmp(struct environ_entry *envent1, struct environ_entry *envent2)
+{
+ return (strcmp(envent1->name, envent2->name));
+}
+
+void
+environ_init(struct environ *env)
+{
+ RB_INIT(env);
+}
+
+void
+environ_free(struct environ *env)
+{
+ struct environ_entry *envent;
+
+ while (!RB_EMPTY(env)) {
+ envent = RB_ROOT(env);
+ RB_REMOVE(environ, env, envent);
+ xfree(envent->name);
+ if (envent->value != NULL)
+ xfree(envent->value);
+ xfree(envent);
+ }
+}
+
+void
+environ_copy(struct environ *srcenv, struct environ *dstenv)
+{
+ struct environ_entry *envent;
+
+ RB_FOREACH(envent, environ, srcenv)
+ environ_set(dstenv, envent->name, envent->value);
+}
+
+struct environ_entry *
+environ_find(struct environ *env, const char *name)
+{
+ struct environ_entry envent;
+
+ envent.name = (char *) name;
+ return (RB_FIND(environ, env, &envent));
+}
+
+void
+environ_set(struct environ *env, const char *name, const char *value)
+{
+ struct environ_entry *envent;
+
+ if ((envent = environ_find(env, name)) != NULL) {
+ if (envent->value != NULL)
+ xfree(envent->value);
+ if (value != NULL)
+ envent->value = xstrdup(value);
+ else
+ envent->value = NULL;
+ } else {
+ envent = xmalloc(sizeof *envent);
+ envent->name = xstrdup(name);
+ if (value != NULL)
+ envent->value = xstrdup(value);
+ else
+ envent->value = NULL;
+ RB_INSERT(environ, env, envent);
+ }
+}
+
+void
+environ_put(struct environ *env, const char *var)
+{
+ char *name, *value;
+
+ value = strchr(var, '=');
+ if (value == NULL)
+ return;
+ value++;
+
+ name = xstrdup(var);
+ name[strcspn(name, "=")] = '\0';
+
+ environ_set(env, name, value);
+ xfree(name);
+}
+
+void
+environ_unset(struct environ *env, const char *name)
+{
+ struct environ_entry *envent;
+
+ if ((envent = environ_find(env, name)) == NULL)
+ return;
+ RB_REMOVE(environ, env, envent);
+ xfree(envent->name);
+ if (envent->value != NULL)
+ xfree(envent->value);
+ xfree(envent);
+}
+
+void
+environ_update(const char *vars, struct environ *srcenv, struct environ *dstenv)
+{
+ struct environ_entry *envent;
+ char *var, *next;
+
+ vars = next = xstrdup(vars);
+ while ((var = strsep(&next, " ")) != NULL) {
+ if ((envent = environ_find(srcenv, var)) == NULL)
+ environ_set(dstenv, var, NULL);
+ else
+ environ_set(dstenv, envent->name, envent->value);
+ }
+ xfree(vars);
+}