diff options
Diffstat (limited to 'lib/libc/stdio/fopen.3')
| -rw-r--r-- | lib/libc/stdio/fopen.3 | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/lib/libc/stdio/fopen.3 b/lib/libc/stdio/fopen.3 index eb39376..1508e59 100644 --- a/lib/libc/stdio/fopen.3 +++ b/lib/libc/stdio/fopen.3 @@ -36,7 +36,7 @@ .\" @(#)fopen.3 8.1 (Berkeley) 6/4/93 .\" $FreeBSD$ .\" -.Dd June 4, 1993 +.Dd January 26, 2003 .Dt FOPEN 3 .Os .Sh NAME @@ -158,6 +158,41 @@ The argument is used just as in the .Fn fopen function. +.Pp +If the +.Fa path +argument is +.Dv NULL , +.Fn freopen +attempts to re-open the file associated with +.Fa stream +with a new mode. +The new mode must be compatible with the mode that the stream was originally +opened with: +.Bl -bullet -offset indent +.It +Streams originally opened with mode +.Dq Li r +can only be reopened with that same mode. +.It +Streams originally opened with mode +.Dq Li a +can be reopened with the same mode, or mode +.Dq Li w . +.It +Streams originally opened with mode +.Dq Li w +can be reopened with the same mode, or mode +.Dq Li a . +.It +Streams originally opened with mode +.Dq Li r+ , +.Dq Li w+ , +or +.Dq Li a+ +can be reopened with any mode. +.El +.Pp The primary use of the .Fn freopen function |
