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Add RETURN VALUES and ERRORS sections.

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This commit is contained in:
Mike Pritchard 1997-01-11 23:20:29 +00:00
parent bf67a4237e
commit 5a547a7217
1 changed files with 28 additions and 3 deletions
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31
lib/libc/sys/mprotect.2
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@ -40,6 +40,7 @@
.Sh SYNOPSIS
.Fd #include <sys/types.h>
.Fd #include <sys/mman.h>
.Ft int
.Fn mprotect "caddr_t addr" "size_t len" "int prot"
.Sh DESCRIPTION
The
@ -49,11 +50,35 @@ changes the specified pages to have protection
.Fa prot .
Not all implementations will guarantee protection on a page basis;
the granularity of protection changes may be as large as an entire region.
.Sh RETURN VALUES
Upon successful completion,
.Fn mprotect
returns 0. Otherwise a value of -1 is returned
and
.Va errno
is set to indicate the error.
.Sh ERRORS
The
.Fn mprotect
function will fail if:
.Bl -tag -width Er
.It Bq Er EINVAL
The virtual address range specified by the
.Fa addr
and
.Fa len
arguments is not valid.
.It Bq Er EACCES
The calling process was not allowed to change
the protection to the value specified by
the
.Fa prot
argument.
.Sh SEE ALSO
.Xr msync 2 ,
.Xr munmap 2 ,
.Xr madvise 2 ,
.Xr mincore 2
.Xr mincore 2 ,
.Xr msync 2 ,
.Xr munmap 2
.Sh HISTORY
The
.Fn mprotect