ref: 75c92428225428c8fde2d015f010e608a0b12f1d
dir: purgatorio/man/2/sys-werrstr
.TH SYS-WERRSTR 2 .SH NAME werrstr \- set the system error string .SH SYNOPSIS .EX include "sys.m"; sys := load Sys Sys->PATH; werrstr(s: string): int; .EE .SH DESCRIPTION When a system call fails, it returns an error value (often -1) and records a string describing the error in a per-process location. The verb .B r in .IR sys-print (2) outputs the error string. .B Werrstr sets the process's error string to .IR s , to allow a function in a module to mimic the error reporting interface of a system call. .SH SEE ALSO .IR sys-intro (2), .IR sys-print (2)