lib/glibc
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This commit is contained in:
Jakub Jelinek
2007-07-31 13:33:18 +00:00
parent d6220e9ee3
commit 32c075e1f0
448 changed files with 13841 additions and 10982 deletions
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75
sysdeps/unix/sysv/linux/ifaddrs.c
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@ -1,5 +1,5 @@
/* getifaddrs -- get names and addresses of all network interfaces
Copyright (C) 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
Copyright (C) 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -122,36 +122,36 @@ int
__netlink_request (struct netlink_handle *h, int type)
{
struct netlink_res *nlm_next;
struct netlink_res **new_nlm_list;
static volatile size_t buf_size = 4096;
char *buf;
struct sockaddr_nl nladdr;
struct nlmsghdr *nlmh;
ssize_t read_len;
bool done = false;
#ifdef PAGE_SIZE
/* Help the compiler optimize out the malloc call if PAGE_SIZE
is constant and smaller or equal to PTHREAD_STACK_MIN/4. */
const size_t buf_size = PAGE_SIZE;
#else
const size_t buf_size = __getpagesize ();
#endif
bool use_malloc = false;
char *buf;
if (__netlink_sendreq (h, type) < 0)
return -1;
size_t this_buf_size = buf_size;
if (__libc_use_alloca (this_buf_size))
buf = alloca (this_buf_size);
if (__libc_use_alloca (buf_size))
buf = alloca (buf_size);
else
{
buf = malloc (this_buf_size);
buf = malloc (buf_size);
if (buf != NULL)
use_malloc = true;
else
goto out_fail;
}
struct iovec iov = { buf, this_buf_size };
struct iovec iov = { buf, buf_size };
if (h->nlm_list != NULL)
new_nlm_list = &h->end_ptr->next;
else
new_nlm_list = &h->nlm_list;
if (__netlink_sendreq (h, type) < 0)
goto out_fail;
while (! done)
{
@ -171,48 +171,7 @@ __netlink_request (struct netlink_handle *h, int type)
continue;
if (__builtin_expect (msg.msg_flags & MSG_TRUNC, 0))
{
if (this_buf_size >= SIZE_MAX / 2)
goto out_fail;
nlm_next = *new_nlm_list;
while (nlm_next != NULL)
{
struct netlink_res *tmpptr;
tmpptr = nlm_next->next;
free (nlm_next);
nlm_next = tmpptr;
}
*new_nlm_list = NULL;
if (__libc_use_alloca (2 * this_buf_size))
buf = extend_alloca (buf, this_buf_size, 2 * this_buf_size);
else
{
this_buf_size *= 2;
char *new_buf = realloc (use_malloc ? buf : NULL, this_buf_size);
if (new_buf == NULL)
goto out_fail;
new_buf = buf;
use_malloc = true;
}
buf_size = this_buf_size;
iov.iov_base = buf;
iov.iov_len = this_buf_size;
/* Increase sequence number, so that we can distinguish
between old and new request messages. */
h->seq++;
if (__netlink_sendreq (h, type) < 0)
goto out_fail;
continue;
}
goto out_fail;
size_t count = 0;
size_t remaining_len = read_len;