man.postnix Miscellaneous man pages of Plan 9 related material

     SYS-WERRSTR(2)                                     SYS-WERRSTR(2)

     NAME
          werrstr - set the system error string

     SYNOPSIS
          include "sys.m";
          sys := load Sys Sys->PATH;

          werrstr(s: string): int;

     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 r in sys-print(2) outputs the
          error string.  Werrstr sets the process's error string to s,
          to allow a function in a module to mimic the error reporting
          interface of a system call.

     SEE ALSO
          sys-intro(2), sys-print(2)

     Page 1                       Plan 9            (printed 10/26/25)