ref: e4e5de20c40bf949636413b9a63ca40975e5d1c2
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 .