static char *debug_env (const char *subcmd, int argc, char *const *const argv);
static char *debug_fds (const char *subcmd, int argc, char *const *const argv);
static char *debug_ls (const char *subcmd, int argc, char *const *const argv);
static char *debug_ll (const char *subcmd, int argc, char *const *const argv);
static char *debug_segv (const char *subcmd, int argc, char *const *const argv);
static char *debug_sh (const char *subcmd, int argc, char *const *const argv);
static char *debug_env (const char *subcmd, int argc, char *const *const argv);
static char *debug_fds (const char *subcmd, int argc, char *const *const argv);
static char *debug_ls (const char *subcmd, int argc, char *const *const argv);
static char *debug_ll (const char *subcmd, int argc, char *const *const argv);
static char *debug_segv (const char *subcmd, int argc, char *const *const argv);
static char *debug_sh (const char *subcmd, int argc, char *const *const argv);