ref: d6bb01da76a0b2ac2887e9b68f6d98126a5feb43
dir: /sys/man/2/postnote/
.TH POSTNOTE 2 .SH NAME postnote \- send a note to a process or process group .SH SYNOPSIS .B #include <u.h> .br .B #include <libc.h> .PP .nf .B int postnote(int who, int pid, char *note) .fi .SH DESCRIPTION .I Postnote sends a note to a process or process group. If .I who is .BR PNPROC , then .I note is written to .BI /proc/ pid /note\f1. If .I who is .BI PNGROUP , the note is delivered to the process group by writing .I note to .BI /proc/ pid /notepg\f1. For .B PNGROUP only, if the calling process is in the target group, the note is .I not delivered to that process. .PP If the write is successful, zero is returned. Otherwise \-1 is returned. .SH SOURCE .B /sys/src/libc/9sys/postnote.c .SH "SEE ALSO" .IR notify (2), .IR intro (2), .IR proc (3) .SH DIAGNOSTICS Sets .IR errstr .