view modules/renameat @ 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 bcce92d916f7
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Description:
renameat() function: rename a file, relative to two directories

Files:
lib/at-func2.c
lib/renameat.c
m4/renameat.m4

Depends-on:
stdio
extensions
fcntl-h
filenamecat-lgpl [test $HAVE_RENAMEAT = 0 || test $REPLACE_RENAMEAT = 1]
openat-h         [test $HAVE_RENAMEAT = 0 || test $REPLACE_RENAMEAT = 1]
statat           [test $REPLACE_RENAMEAT = 1]
stdbool          [test $REPLACE_RENAMEAT = 1]
at-internal      [test $HAVE_RENAMEAT = 0]
dosname          [test $HAVE_RENAMEAT = 0]
getcwd-lgpl      [test $HAVE_RENAMEAT = 0]
openat-die       [test $HAVE_RENAMEAT = 0]
rename           [test $HAVE_RENAMEAT = 0]
same-inode       [test $HAVE_RENAMEAT = 0]
save-cwd         [test $HAVE_RENAMEAT = 0]

configure.ac:
gl_FUNC_RENAMEAT
if test $HAVE_RENAMEAT = 0 || test $REPLACE_RENAMEAT = 1; then
  AC_LIBOBJ([renameat])
fi
if test $HAVE_RENAMEAT = 0; then
  AC_LIBOBJ([at-func2])
fi
gl_STDIO_MODULE_INDICATOR([renameat])

Makefile.am:

Include:
<fcntl.h>
<stdio.h>

License:
GPL

Maintainer:
Jim Meyering, Eric Blake