readlink: document portability issue with symlink length Per comments in areadlink, ERANGE on a too-small buffer is expected on some platforms; making the readlink module guarantee GNU behavior of truncated contents is counter-productive, since we would be duplicating areadlink to learn a-priori how large to make the buffer, and since truncated contents are not as useful. * doc/posix-functions/lstat.texi (lstat): Mention that some file systems have bogus st_size on symlinks, and mention the areadlink-with-size module. * doc/posix-functions/fstatat.texi (fstatat): Likewise. * doc/posix-functions/readlink.texi (readlink): Mention the areadlink module, and ERANGE failure. * doc/posix-functions/readlinkat.texi (readlinkat): Likewise. * tests/test-readlink.c (main): Relax test for AIX, HP-UX. Signed-off-by: Eric Blake <ebb9@byu.net>

#!/bin/sh

tmpfiles=""
trap 'rm -fr $tmpfiles' 1 2 3 15

# Test signal's default behaviour.
tmpfiles="$tmpfiles t-sigpipeA.tmp"
./test-sigpipe${EXEEXT} A 2> t-sigpipeA.tmp | head -1 > /dev/null
if test -s t-sigpipeA.tmp; then
  LC_ALL=C tr -d '\r' < t-sigpipeA.tmp
  rm -fr $tmpfiles; exit 1
fi

# Test signal's ignored behaviour.
tmpfiles="$tmpfiles t-sigpipeB.tmp"
./test-sigpipe${EXEEXT} B 2> t-sigpipeB.tmp | head -1 > /dev/null
if test -s t-sigpipeB.tmp; then
  LC_ALL=C tr -d '\r' < t-sigpipeB.tmp
  rm -fr $tmpfiles; exit 1
fi

# Test signal's behaviour when a handler is installed.
tmpfiles="$tmpfiles t-sigpipeC.tmp"
./test-sigpipe${EXEEXT} B 2> t-sigpipeC.tmp | head -1 > /dev/null
if test -s t-sigpipeC.tmp; then
  LC_ALL=C tr -d '\r' < t-sigpipeC.tmp
  rm -fr $tmpfiles; exit 1
fi

rm -fr $tmpfiles
exit 0