summaryrefslogtreecommitdiff
path: root/sysdeps/unix/sysv/linux/sendmsg.c
diff options
context:
space:
mode:
Diffstat (limited to 'sysdeps/unix/sysv/linux/sendmsg.c')
-rw-r--r--sysdeps/unix/sysv/linux/sendmsg.c124
1 files changed, 0 insertions, 124 deletions
diff --git a/sysdeps/unix/sysv/linux/sendmsg.c b/sysdeps/unix/sysv/linux/sendmsg.c
deleted file mode 100644
index 304aa6e2a1..0000000000
--- a/sysdeps/unix/sysv/linux/sendmsg.c
+++ /dev/null
@@ -1,124 +0,0 @@
-/* Copyright (C) 1998 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
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 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
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If not,
- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
-
-#include <sys/socket.h>
-#include <errno.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#include <asm/posix_types.h>
-
-/* The kernel expects this structure in SCM_CREDS messages.
- * Note: sizeof(struct __kernel_ucred) <= sizeof(struct cmsgcred) must hold.
- */
-struct kernel_ucred
- {
- __kernel_pid_t pid;
- __kernel_uid_t uid;
- __kernel_gid_t gid;
- };
-
-struct credmsg
- {
- struct cmsghdr cm;
- struct cmsgcred cc;
- };
-
-struct kcredmsg
- {
- struct cmsghdr cm;
- struct kernel_ucred cc;
- };
-
-extern int __syscall_sendmsg (int, const struct msghdr *, int);
-
-/* Send a message described by MESSAGE on socket FD.
- Returns the number of bytes sent, or -1 for errors. */
-int
-__libc_sendmsg (int fd, const struct msghdr *message, int flags)
-{
- struct msghdr m;
- char *buf, *a, *b;
- struct credmsg *cred = 0;
- struct kcredmsg *kcred;
- struct cmsghdr *cm;
- long int offset = 0;
- pid_t pid;
-
- /* Preprocess the message control block for SCM_CREDS. */
- if (message->msg_controllen)
- {
- cm = CMSG_FIRSTHDR (message);
- while (cm)
- {
- if (cm->cmsg_type == SCM_CREDS)
- {
- if (cred ||
- cm->cmsg_len < CMSG_LEN (sizeof (struct cmsgcred)))
- {
- __set_errno (EINVAL);
- return -1;
- }
- else
- {
- cred = (struct credmsg *) cm;
- offset = (char *) cm - (char *) message->msg_control;
- }
- }
- cm = CMSG_NXTHDR ((struct msghdr *) message, cm);
- }
-
- if (cred)
- {
- buf = alloca (message->msg_controllen);
- memcpy (buf, message->msg_control, message->msg_controllen);
- kcred = (struct kcredmsg *) (buf + offset);
- a = (char *) kcred + CMSG_LEN (sizeof (struct kernel_ucred));
- b = (char *) kcred + CMSG_LEN (sizeof (struct cmsgcred));
- memmove (a, b, message->msg_controllen - (b - buf));
-
- kcred->cm.cmsg_len = CMSG_LEN (sizeof (struct kernel_ucred));
-
- /* Linux expects the calling process to pass in
- its credentials, and sanity checks them.
- You can send real, effective, or set- uid and gid.
- If the user hasn't filled in the buffer, we default to
- real uid and gid. */
- pid = __getpid ();
- if (cred->cc.cmcred_pid != pid)
- {
- kcred->cc.pid = pid;
- kcred->cc.uid = __getuid ();
- kcred->cc.gid = __getgid ();
- }
- else
- {
- kcred->cc.uid = cred->cc.cmcred_uid;
- kcred->cc.gid = cred->cc.cmcred_gid;
- }
- memcpy (&m, message, sizeof (struct msghdr));
- m.msg_control = buf;
- m.msg_controllen -= b - a;
- return __syscall_sendmsg (fd, &m, flags);
- }
- }
- return __syscall_sendmsg (fd, message, flags);
-}
-
-weak_alias (__libc_sendmsg, sendmsg)