view modules/faccessat @ 37246:5cfb3a67238d

regex: avoid glibc deadlock during configure glibc has a known bug where certain corruptions of the heap can cause malloc to default to printing a debug message that includes a backtrace, but the act of getting the backtrace uses dlopen which in turn calls into malloc, causing a recursive lock ending in deadlock. Thus, when configure is probing for a known glibc heap corruption bug, the overall configure would hang. The solution suggested by glibc developers is to force malloc to quit printing debug messages, which avoids recursive malloc. * m4/regex.m4 (gl_REGEX): Avoid recursive malloc deadlock when glibc bug 15078 in turn triggers bug 16159. Reported by Michal Privoznik. Signed-off-by: Eric Blake <eblake@redhat.com>
author Eric Blake <eblake@redhat.com>
date Tue, 03 Dec 2013 10:34:13 -0700
parents f3bc58f169b7
children 23bf293630c0
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Description:
faccessat() function: check user's permissions for a file.

Files:
lib/faccessat.c
lib/at-func.c
m4/faccessat.m4

Depends-on:
unistd
extensions
at-internal     [test $HAVE_FACCESSAT = 0]
dosname         [test $HAVE_FACCESSAT = 0]
errno           [test $HAVE_FACCESSAT = 0]
fchdir          [test $HAVE_FACCESSAT = 0]
fcntl-h         [test $HAVE_FACCESSAT = 0]
openat-die      [test $HAVE_FACCESSAT = 0]
openat-h        [test $HAVE_FACCESSAT = 0]
save-cwd        [test $HAVE_FACCESSAT = 0]
euidaccess      [test $HAVE_FACCESSAT = 0]

configure.ac:
gl_FUNC_FACCESSAT
if test $HAVE_FACCESSAT = 0; then
  AC_LIBOBJ([faccessat])
  gl_PREREQ_FACCESSAT
fi
gl_MODULE_INDICATOR([faccessat])
gl_UNISTD_MODULE_INDICATOR([faccessat])

Makefile.am:

Include:
<fcntl.h>
<unistd.h>

Link:
$(LIB_EACCESS)

License:
GPL

Maintainer:
Jim Meyering, Eric Blake