ref: 2c9e3861a54e22498fb2e3226defe4393b20b202
dir: /sys/src/libc/9sys/postnote.c/
#include <u.h> #include <libc.h> int postnote(int group, int pid, char *note) { char file[128]; int f, r; switch(group) { case PNPROC: sprint(file, "/proc/%d/note", pid); break; case PNGROUP: sprint(file, "/proc/%d/notepg", pid); break; default: return -1; } f = open(file, OWRITE); if(f < 0) return -1; r = strlen(note); if(write(f, note, r) != r) { close(f); return -1; } close(f); return 0; }