ref: d4bd43e5d1cec8f0c498e4e344abeccab20f5ad5
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 .