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Diffstat (limited to 'newlib/libc/argz/envz_get.c')
-rw-r--r--newlib/libc/argz/envz_get.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/newlib/libc/argz/envz_get.c b/newlib/libc/argz/envz_get.c
new file mode 100644
index 000000000..dae51bed7
--- /dev/null
+++ b/newlib/libc/argz/envz_get.c
@@ -0,0 +1,40 @@
+/* Copyright (C) 2002 by Red Hat, Incorporated. All rights reserved.
+ *
+ * Permission to use, copy, modify, and distribute this software
+ * is freely granted, provided that this notice is preserved.
+ */
+
+#include <errno.h>
+#include <sys/types.h>
+#include <string.h>
+#include <stdlib.h>
+#include <envz.h>
+
+extern int buf_findstr(const char *str, char **buf, size_t *buf_len);
+
+char *
+envz_get (const char *envz, size_t envz_len, const char *name)
+{
+ const char *buf_ptr = envz;
+ size_t buf_len = envz_len;
+
+ while(buf_len)
+ {
+ if (buf_findstr(name, &buf_ptr, &buf_len))
+ {
+ if (*buf_ptr == '=')
+ {
+ buf_ptr++;
+ return buf_ptr;
+ }
+ else
+ {
+ if (*buf_ptr == '\0')
+ /* NULL entry. */
+ return NULL;
+ }
+ }
+ }
+ /* No matching entries found. */
+ return NULL;
+}