Replace (il)legal by "permitted" or "valid"

man2/bdflush.2

@@ -72,7 +72,7 @@ and the kernel sets tuning parameter numbered
 .RI "(" "func" "\-3)/2"
 to that value.
 .PP
-The set of parameters, their values, and their legal ranges
+The set of parameters, their values, and their valid ranges
 are defined in the kernel source file
 .IR fs/buffer.c .
 .SH "RETURN VALUE"

man2/inotify_add_watch.2

@@ -97,7 +97,7 @@ The given file descriptor is not valid.
 points outside of the process's accessible address space.
 .TP
 .B EINVAL
-The given event mask contains no legal events; or
+The given event mask contains no valid events; or
 .I fd
 is not an inotify file descriptor.
 .TP

man2/mprotect.2

@@ -112,7 +112,7 @@ is unspecified if it is applied to a region of memory that
 was not obtained via
 .BR mmap (2).
 .SH NOTES
-On Linux it is always legal to call
+On Linux it is always permissible to call
 .BR mprotect ()
 on any address in a process's address space (except for the
 kernel vsyscall area).

man2/sigprocmask.2

@@ -48,7 +48,7 @@ argument.
 The signals in
 .I set
 are removed from the current set of blocked signals.
-It is legal to attempt to unblock a signal which is not blocked.
+It is permissible to attempt to unblock a signal which is not blocked.
 .TP
 .B SIG_SETMASK
 The set of blocked signals is set to the argument

man3/ctime.3

@@ -222,7 +222,7 @@ The function ignores
 the specified contents of the structure members \fItm_wday\fP and \fItm_yday\fP
 and recomputes them from the other information in the broken-down time
 structure.
-If structure members are outside their legal interval, they will be
+If structure members are outside their valid interval, they will be
 normalized (so that, for example, 40 October is changed into 9 November).
 Calling
 .BR mktime ()

man3/getusershell.3

@@ -27,7 +27,7 @@
 .\" Modified Sat Jul 24 19:17:53 1993 by Rik Faith (faith@cs.unc.edu)
 .TH GETUSERSHELL 3  2007-07-26 "GNU" "Linux Programmer's Manual"
 .SH NAME
-getusershell, setusershell, endusershell \- get legal user shells
+getusershell, setusershell, endusershell \- get permitted user shells
 .SH SYNOPSIS
 .nf
 .B #include <unistd.h>

man3/setbuf.3

@@ -181,7 +181,7 @@ points to still exists by the time
 .I stream
 is closed, which also happens at program termination.
 .P
-For example, the following is illegal:
+For example, the following is invalid:
 .nf
 .sp
 #include <stdio.h>

man4/st.4

@@ -839,7 +839,7 @@ process.
 .B EINVAL
 An
 .BR ioctl (2)
-had an illegal argument, or a requested block size was illegal.
+had an invalid argument, or a requested block size was invalid.
 .TP
 .B EIO
 The requested operation could not be completed.

man7/ip.7

@@ -493,7 +493,7 @@ causing the error is returned as normal payload.
 .\" conditions and breaks the protocol specification.
 Note that TCP has no error queue;
 .B MSG_ERRQUEUE
-is illegal on
+is not permitted on
 .B SOCK_STREAM
 sockets.
 .B IP_RECVERR

man7/packet.7

@@ -129,7 +129,7 @@ It defaults to the socket's protocol.
 is the interface index of the interface
 (see
 .BR netdevice (7));
-0 matches any interface (only legal for binding).
+0 matches any interface (only permitted for binding).
 .I sll_hatype
 is a ARP type as defined in the
 .I <linux/if_arp.h>
@@ -267,7 +267,7 @@ No packet received.
 No interface address passed.
 .TP
 .B ENXIO
-Interface address contained illegal interface index.
+Interface address contained an invalid interface index.
 .TP
 .B EPERM
 User has insufficient privileges to carry out this operation.