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-rw-r--r--compat/unsetenv.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/compat/unsetenv.c b/compat/unsetenv.c
new file mode 100644
index 0000000000..bf5fd7063b
--- /dev/null
+++ b/compat/unsetenv.c
@@ -0,0 +1,27 @@
+#include "../git-compat-util.h"
+
+void gitunsetenv (const char *name)
+{
+#if !defined(__MINGW32__)
+ extern char **environ;
+#endif
+ int src, dst;
+ size_t nmln;
+
+ nmln = strlen(name);
+
+ for (src = dst = 0; environ[src]; ++src) {
+ size_t enln;
+ enln = strlen(environ[src]);
+ if (enln > nmln) {
+ /* might match, and can test for '=' safely */
+ if (0 == strncmp (environ[src], name, nmln)
+ && '=' == environ[src][nmln])
+ /* matches, so skip */
+ continue;
+ }
+ environ[dst] = environ[src];
+ ++dst;
+ }
+ environ[dst] = NULL;
+}