diff options
| author |   deraadt <deraadt@openbsd.org> | 2003-09-26 16:24:56 +0000 |
|---|---|---|
| committer | deraadt <deraadt@openbsd.org> | 2003-09-26 16:24:56 +0000 |
| commit | 78ded143e3c2296ff97055132519a8ad3c27df03 (patch) | |
| tree | d7aac98c464e2bfe0cd186e3b01c58ef670a96cc /lib/libc | |
| parent | Walking up to a firewall box which had the console logged in, to see (diff) | |
| download | wireguard-openbsd-78ded143e3c2296ff97055132519a8ad3c27df03.tar.xz wireguard-openbsd-78ded143e3c2296ff97055132519a8ad3c27df03.zip | |
for %#s, # is the amount of input string, not the amount of output string.
hence # must be 1 less than the size of the storage buffer. yes, we've known
this for a long time, but it is not clearly documented and half the code out
there does not use n-1! whoever designed this needs to be tortured.
Diffstat (limited to 'lib/libc')
| -rw-r--r-- | lib/libc/stdio/scanf.3 | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/lib/libc/stdio/scanf.3 b/lib/libc/stdio/scanf.3 index 39929f92810..e81b1cf409b 100644 --- a/lib/libc/stdio/scanf.3 +++ b/lib/libc/stdio/scanf.3 @@ -1,4 +1,4 @@ -.\" $OpenBSD: scanf.3,v 1.11 2003/06/02 20:18:37 millert Exp $ +.\" $OpenBSD: scanf.3,v 1.12 2003/09/26 16:24:56 deraadt Exp $ .\" .\" Copyright (c) 1990, 1991, 1993 .\" The Regents of the University of California. All rights reserved. @@ -250,12 +250,17 @@ Equivalent to Matches a sequence of non-whitespace characters; the next pointer must be a pointer to .Li char , -and the array must be large enough to accept all the sequence and the -terminating +and the provided array must be large enough to accept and store +all the sequence and the terminating .Tn NUL character. The input string stops at whitespace or at the maximum field width, whichever occurs first. +If specified, the maximum field length refers to the sequence +being scanned rather than the storage space, hence the provided +array must be 1 larger for the terminating +.Tn NUL +character. .It Cm c Matches a sequence of .Li width |