Format errno.

man2/pciconfig_read.2

@@ -54,11 +54,15 @@ the IO base for PIO cycles, or the ISA holes if any.
 .TP
 .BR pciconfig_read ()
 On success zero is returned.
-On error, \-1 is returned and errno is set appropriately.
+On error, \-1 is returned and
+,I errno
+is set appropriately.
 .TP
 .BR pciconfig_write ()
 On success zero is returned.
-On error, \-1 is returned and errno is set appropriately.
+On error, \-1 is returned and
+.I errno
+is set appropriately.
 .TP
 .BR pciconfig_iobase ()
 Returns information on locations of various I/O

man2/recv.2

@@ -192,7 +192,9 @@ struct sockaddr *SO_EE_OFFENDER(struct sock_extended_err *);
 .in -0.25i
 .IP
 .B ee_errno
-contains the errno number of the queued error.
+contains the
+.I errno
+number of the queued error.
 .B ee_origin
 is the origin code of where the error originated.
 The other fields are protocol specific.

man3/errno.3

@@ -38,26 +38,26 @@ errno \- number of last error
 The
 .I <errno.h>
 header file defines the integer variable
-.BR errno ,
+.IR errno ,
 which is set by system calls and some library functions in the event
 of an error to indicate what went wrong.
 Its value is significant only when the call
 returned an error (usually \-1), and a function that does succeed
 is allowed to change
-.BR errno .
+.IR errno .
 
 Sometimes, when \-1 is also a valid successful return value
 one has to zero
-.B errno
+.I errno
 before the call in order to detect possible errors.
 
-\fBerrno\fR is defined by the ISO C standard to be a modifiable lvalue
-of type \fIint\fR, and must not be explicitly declared; \fBerrno\fR
+\fIerrno\fR is defined by the ISO C standard to be a modifiable lvalue
+of type \fIint\fR, and must not be explicitly declared; \fIerrno\fR
 may be a macro.
-\fBerrno\fR is thread-local; setting it in one thread
+\fIerrno\fR is thread-local; setting it in one thread
 does not affect its value in any other thread.
 
-Valid error numbers are all non-zero; \fBerrno\fR is never set to zero
+Valid error numbers are all non-zero; \fIerrno\fR is never set to zero
 by any library function.
 All the error names specified by POSIX.1
 must have distinct values, with the exception of

man3/mpool.3

@@ -126,13 +126,17 @@ If a new page can be allocated, a pointer to the page is returned and
 the page number is stored into the
 .I pgnoaddr
 address.
-Otherwise, NULL is returned and errno is set.
+Otherwise, NULL is returned and
+.I errno
+is set.
 .PP
 The function
 .BR mpool_get ()
 takes a MPOOL pointer and a page number as arguments.
 If the page exists, a pointer to the page is returned.
-Otherwise, NULL is returned and errno is set.
+Otherwise, NULL is returned and
+.I errno
+is set.
 The flags parameter is not currently used.
 .PP
 The function

man3/strtol.3

@@ -92,7 +92,8 @@ returns LONG_MIN.
 If an overflow occurs,
 .BR strtol ()
 returns LONG_MAX.
-In both cases, \fIerrno\fP is set to ERANGE.
+In both cases, \fIerrno\fP is set to
+.BR ERANGE .
 Precisely the same holds for
 .BR strtoll ()
 (with LLONG_MIN and LLONG_MAX instead of LONG_MIN and LONG_MAX).

man7/ip.7

@@ -421,7 +421,9 @@ struct sockaddr *SO_EE_OFFENDER(struct sock_extended_err *);
 .in -0.25i
 .IP
 .I ee_errno
-contains the errno number of the queued error.
+contains the
+.I errno
+number of the queued error.
 .I ee_origin
 is the origin code of where the error originated.
 The other fields are protocol specific.