[Bug 255] New: printf() field width limit is unacceptable

bugzilla at busybox.net bugzilla at busybox.net
Tue Mar 31 05:18:34 UTC 2009


https://bugs.busybox.net/show_bug.cgi?id=255

              Host: i386-pc-linux-uclibc
            Target: i386-pc-linux-uclibc
             Build: i386-pc-linux-uclibc
           Summary: printf() field width limit is unacceptable
           Product: uClibc
           Version: 0.9.30.1
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P5
         Component: stdio
        AssignedTo: unassigned at uclibc.org
        ReportedBy: michael at talamasca.ocis.net
                CC: uclibc-cvs at uclibc.org
   Estimated Hours: 0.0


Created an attachment (id=219)
 --> (https://bugs.busybox.net/attachment.cgi?id=219)
Patch to remove stdio field width cap

uClibc mishandles printf field width limits larger than 40959, as a result of
misguided overflow-protection code.  This causes spurious test failures with
GNU coreutils, which depends on "%65536s" and "%20000000f" working according to
spec.

I'm including a simple patch to fix the problem, extending the limit to
INT_MAX.

When I reported this earlier in the old bug-tracking system, I was asked for a
test program.  I've posted one on:

ftp://ftp.ocis.net/pub/users/ldeutsch/uCpatches/widthtest.c


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