diff --git a/lib/libc/sys/intro.2 b/lib/libc/sys/intro.2 index c9cb8b4b8490..200d08600712 100644 --- a/lib/libc/sys/intro.2 +++ b/lib/libc/sys/intro.2 @@ -48,7 +48,7 @@ their error returns, and other common definitions and concepts. .\".Pp .\".Sy System call restart .\".Pp -.\" +.\"(more later...) .Sh RETURN VALUES Nearly all of the system calls provide an error number referenced via the external identifier errno. @@ -76,8 +76,8 @@ indicating failure (usually -1) and sets the variable .Va errno accordingly. - +(This allows interpretation of the failure on receiving +a -1 and to take action accordingly.) Successful calls never set .Va errno ; once set, it remains until another error occurs. @@ -197,8 +197,8 @@ Maximum number of file descriptors allowable on the system has been reached and a requests for an open cannot be satisfied until at least one has been closed. .It Er 24 EMFILE Em "Too many open files" . - +(As released, the limit on the number of +open files per process is 64.) The .Xr getdtablesize 2 system call will obtain the current limit.