.Sh SYNOPSIS
.In unistd.h
.Ft pid_t
-.Fn getsid "pid_t pid"
+.Fo getsid
+.Fa "pid_t pid"
+.Fc
.Sh DESCRIPTION
The session ID of the process identified by
.Fa pid
the specified process; otherwise, it returns a value of -1 and
sets errno to indicate an error.
.Sh ERRORS
+The
.Fn getsid
-will succeed unless:
+system call will fail if:
.Bl -tag -width Er
+.\" ==========
.It Bq Er ESRCH
-if there is no process with a process ID equal to
+There is no process with a process ID equal to
.Fa pid .
.El
.Pp