ref: f6bff3c0830c1fe63dc45cd84d0a0a3a67b0cdf0 dir: /sys/src/ape/lib/ap/plan9/execl.c/
#include <unistd.h> extern char **environ; int execl(const char *name, const char *arg0, ...) { return execve(name, &arg0, environ); }