6 extern char **environ;
16   for (ev = environ; *ev; ev++) bytes += sizeof(char *) + strlen(*ev) + 1;  in environ_bytes()
26   *environ = 0;  in xclearenv()
40     while (environ[toys.envc++]);  in xsetenv()
42       environ, toys.envc*sizeof(char *));  in xsetenv()
43     environ = (void *)new;  in xsetenv()
57   for (i = 0; environ[i]; i++) {  in xsetenv()
59     if (!memcmp(name, environ[i], len) && environ[i][len]=='=') {  in xsetenv()
60       if (i>=envc) free(environ[i]);  in xsetenv()
64         for (; new ? i<envc : !!environ[i]; i++) environ[i] = environ[i+1];  in xsetenv()
74   if (!environ[i]) {  in xsetenv()
76     if (!(len&255)) environ = xrealloc(environ, len*sizeof(char *));  in xsetenv()
77     environ[len] = 0;  in xsetenv()
79   environ[i] = new;  in xsetenv()
108     for (ev1 = ev2 = environ;;) {  in reset_env()