NAME

postnote − send a note to a process or process group

SYNOPSIS

­#include <u.h>
­#include <libc.h>

intpostnote(int who, int pid, char ∗note)

DESCRIPTION

­Postnote sends a note to a process or process group.  If ­who is PNPROC, then ­note is written to /proc/pid/note.  If ­who is PNGROUP, the note is delivered to the process group by writing ­note to /proc/pid/notepg.  For ­PNGROUP only, if the calling process is in the target group, the note is ­not delivered to that process. 

If the write is successful, zero is returned.  Otherwise −1 is returned. 

SOURCE

­/sys/src/libc/9sys/postnote.c

SEE ALSO

notify(2), intro(2), proc(3)

DIAGNOSTICS

Sets errstr.

Plan 9  —  December 11, 1999