ref: 94e7de15311c12c6fba68cc3ccffdc16945eb9fb
dir: /sys/src/cmd/unix/drawterm/libc/getpid.c/
#include <u.h> #include <libc.h> int getpid(void) { char b[20]; int f; memset(b, 0, sizeof(b)); f = open("#c/pid", 0); if(f >= 0) { read(f, b, sizeof(b)); close(f); } return atol(b); }