Commit c823199df2cc03b6bd70d0a2fef5999af82792fe
2010-10-05T16:39:32
memmem, strstr, strcasestr: fix bug with long periodic needle * lib/str-two-way.h (two_way_long_needle): Avoid bug with long periodic needle having false positive. * m4/memmem.m4 (gl_FUNC_MEMMEM_SIMPLE): Detect bug in glibc 2.12 and cygwin 1.7.7. (gl_FUNC_MEMMEM): Be more pessimistic when cross-compiling. * m4/strcasestr.m4 (gl_FUNC_STRCASESTR_SIMPLE) (gl_FUNC_STRCASESTR): Likewise. * m4/strstr.m4 (gl_FUNC_STRSTR_SIMPLE, gl_FUNC_STRSTR): Likewise. * tests/test-memmem.c (main): Expose the bug. * tests/test-strcasestr.c (main): Likewise. * tests/test-strstr.c (main): Likewise. * tests/test-c-strcasestr.c (main): Likewise. * doc/glibc-functions/memmem.texi (memmem): Document the bug. * doc/posix-functions/strstr.texi (strstr): Likewise. * doc/glibc-functions/strcasestr.texi (strcasestr): Likewise. Reported via http://sourceware.org/bugzilla/show_bug.cgi?id=12092 Signed-off-by: Eric Blake <eblake@redhat.com>