diff options
Diffstat (limited to 'manual/errno.texi')
| -rw-r--r-- | manual/errno.texi | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/manual/errno.texi b/manual/errno.texi index c073deb7f8..86b4c74e7a 100644 --- a/manual/errno.texi +++ b/manual/errno.texi @@ -1231,8 +1231,10 @@ The function @code{strerror} is declared in @file{string.h}. @deftypefun {char *} strerror_r (int @var{errnum}, char *@var{buf}, size_t @var{n}) The @code{strerror_r} function works like @code{strerror} but instead of returning the error message in a statically allocated buffer shared by -all threads in the process, it writes the message string in the user -supplied buffer starting at @var{buf} with the length of @var{n} bytes. +all threads in the process, it returns a private copy for the +thread. This might be either some permanent global data or a message +string in the user supplied buffer starting at @var{buf} with the +length of @var{n} bytes. At most @var{n} characters are written (including the NUL byte) so it is up to the user to select the buffer large enough. |