codes.
You need to read the source to be sure how it will return errors.
Usually, it is the negative of a standard error code,
-for example, i
+for example,
.RI \- EPERM .
The _syscall() macros will return the result
.I r
.BR intro (2),
.BR syscall (2),
.BR errno (3)
+.SH COLOPHON
+This page is part of release 3.68 of the Linux
+.I man-pages
+project.
+A description of the project,
+information about reporting bugs,
+and the latest version of this page,
+can be found at
+\%http://www.kernel.org/doc/man\-pages/.