view modules/fchownat @ 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 9e5c2fa56a94
children
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Description:
fchownat() function: Change the owner of a file at a directory.

Files:
lib/fchownat.c
lib/chownat.c
lib/at-func.c
m4/fchownat.m4

Depends-on:
unistd
extensions
at-internal     [test $HAVE_FCHOWNAT = 0 || test $REPLACE_FCHOWNAT = 1]
dosname         [test $HAVE_FCHOWNAT = 0 || test $REPLACE_FCHOWNAT = 1]
errno           [test $HAVE_FCHOWNAT = 0 || test $REPLACE_FCHOWNAT = 1]
extern-inline   [test $HAVE_FCHOWNAT = 0 || test $REPLACE_FCHOWNAT = 1]
fchdir          [test $HAVE_FCHOWNAT = 0 || test $REPLACE_FCHOWNAT = 1]
fcntl-h         [test $HAVE_FCHOWNAT = 0 || test $REPLACE_FCHOWNAT = 1]
lchown          [test $HAVE_FCHOWNAT = 0 || test $REPLACE_FCHOWNAT = 1]
openat-die      [test $HAVE_FCHOWNAT = 0 || test $REPLACE_FCHOWNAT = 1]
openat-h        [test $HAVE_FCHOWNAT = 0 || test $REPLACE_FCHOWNAT = 1]
save-cwd        [test $HAVE_FCHOWNAT = 0 || test $REPLACE_FCHOWNAT = 1]
statat          [test $REPLACE_FCHOWNAT = 1]

configure.ac:
gl_FUNC_FCHOWNAT
if test $HAVE_FCHOWNAT = 0 || test $REPLACE_FCHOWNAT = 1; then
  AC_LIBOBJ([fchownat])
fi
gl_MODULE_INDICATOR([fchownat]) dnl for lib/openat.h
gl_UNISTD_MODULE_INDICATOR([fchownat])

Makefile.am:
lib_SOURCES += chownat.c

Include:
<unistd.h>

License:
GPL

Maintainer:
Jim Meyering, Eric Blake