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/* Copyright (C) 2008 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by David Bartley <dtbartle@csclub.uwaterloo.ca>, 2008.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <stdlib.h>
#include <dirent.h>
#include <sys/resource.h>
/* Docs: http://docs.sun.com/app/docs/doc/816-5168/fdwalk-3c */
int fdwalk (int (*func)(void *, int), void *cd)
{
int res = 0;
DIR *dir;
dir = opendir ("/proc/self/fd");
if (dir)
{
/* Note that fdwalk is not required to be thread-safe so we don't need to
use the _r version. */
struct dirent *dirent;
while ((dirent = readdir (dir)))
{
int fd;
if (dirent->d_name[0] == '.')
continue;
fd = atoi (dirent->d_name);
if (fd == dirfd (dir))
continue;
res = (*func)(cd, fd);
if (res != 0)
break;
}
(void) closedir (dir);
}
else
{
struct rlimit rlim;
int fd;
if (getrlimit (RLIMIT_NOFILE, &rlim) != 0)
return -1;
for (fd = 0; fd < rlim.rlim_max; fd++)
{
res = (*func)(cd, fd);
if (res != 0)
break;
}
}
return res;
}
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