1 files changed, 34 insertions, 0 deletions

diff --git a/libbb/setenv.c b/libbb/setenv.c
new file mode 100644
index 000000000..3a22ea7b7
--- /dev/null
+++ b/libbb/setenv.c
@@ -0,0 +1,34 @@
+#include "../git-compat-util.h"
+
+int gitsetenv(const char *name, const char *value, int replace)
+{
+        int out;
+        size_t namelen, valuelen;
+        char *envstr;
+
+        if (!name || !value) return -1;
+        if (!replace) {
+                char *oldval = NULL;
+                oldval = getenv(name);
+                if (oldval) return 0;
+        }
+
+        namelen = strlen(name);
+        valuelen = strlen(value);
+        envstr = malloc((namelen + valuelen + 2));
+        if (!envstr) return -1;
+
+        memcpy(envstr, name, namelen);
+        envstr[namelen] = '=';
+        memcpy(envstr + namelen + 1, value, valuelen);
+        envstr[namelen + valuelen + 1] = 0;
+
+        out = putenv(envstr);
+        /* putenv(3) makes the argument string part of the environment,
+         * and changing that string modifies the environment --- which
+         * means we do not own that storage anymore.  Do not free
+         * envstr.
+         */
+
+        return out;
+}