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freebsd/lib/libc/rpc/bindresvport.c
Poul-Henning Kamp 4c3af266f6 Well, cvs commit core'ed on me, I belive I have got all the locks out,
but a commit mail got lost, it's the same as for this commit:

 lib/libc/gen  confstr.c crypt.c disklabel.c fstab.c getcap.c
          getgrent.c  getgrouplist.c getpass.c getpwent.c
          initgroups.c nlist.c  psignal.c pwcache.c setmode.c
          sleep.c sysconf.c sysctl.c  syslog.c usleep.c
 lib/libc/locale  none.c read_runemagi.c setlocale.c
 lib/libc/net  gethostbydns.c getnetbydns.c getnetbynis.c
 lib/libc/nls  msgcat.c
 lib/libc/quad  Makefile.inc
 lib/libc/regex  engine.c regcomp.c regerror.c

	Minor cleanup, mostly unused vars and missing #includes.
	Limit the number of quad functions we pull in for 'i386'.
	I still belive the quad stuff should go back into gcc.
	Add compile-time warnings about crypt functions.
1995-10-22 14:51:39 +00:00

87 lines
2.5 KiB
C

/*
* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
* unrestricted use provided that this legend is included on all tape
* media and as a part of the software program in whole or part. Users
* may copy or modify Sun RPC without charge, but are not authorized
* to license or distribute it to anyone else except as part of a product or
* program developed by the user.
*
* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
*
* Sun RPC is provided with no support and without any obligation on the
* part of Sun Microsystems, Inc. to assist in its use, correction,
* modification or enhancement.
*
* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
* OR ANY PART THEREOF.
*
* In no event will Sun Microsystems, Inc. be liable for any lost revenue
* or profits or other special, indirect and consequential damages, even if
* Sun has been advised of the possibility of such damages.
*
* Sun Microsystems, Inc.
* 2550 Garcia Avenue
* Mountain View, California 94043
*/
#if defined(LIBC_SCCS) && !defined(lint)
/*static char *sccsid = "from: @(#)bindresvport.c 1.8 88/02/08 SMI";*/
/*static char *sccsid = "from: @(#)bindresvport.c 2.2 88/07/29 4.0 RPCSRC";*/
static char *rcsid = "$Id: bindresvport.c,v 1.2 1995/05/30 05:41:13 rgrimes Exp $";
#endif
/*
* Copyright (c) 1987 by Sun Microsystems, Inc.
*/
#include <sys/types.h>
#include <sys/errno.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>
#include <string.h>
/*
* Bind a socket to a privileged IP port
*/
bindresvport(sd, sin)
int sd;
struct sockaddr_in *sin;
{
int res;
static short port;
struct sockaddr_in myaddr;
extern int errno;
int i;
#define STARTPORT 600
#define ENDPORT (IPPORT_RESERVED - 1)
#define NPORTS (ENDPORT - STARTPORT + 1)
if (sin == (struct sockaddr_in *)0) {
sin = &myaddr;
bzero(sin, sizeof (*sin));
sin->sin_family = AF_INET;
} else if (sin->sin_family != AF_INET) {
errno = EPFNOSUPPORT;
return (-1);
}
if (port == 0) {
port = (getpid() % NPORTS) + STARTPORT;
}
res = -1;
errno = EADDRINUSE;
for (i = 0; i < NPORTS && res < 0 && errno == EADDRINUSE; i++) {
sin->sin_port = htons(port++);
if (port > ENDPORT) {
port = STARTPORT;
}
res = bind(sd,
(struct sockaddr *)sin, sizeof(struct sockaddr_in));
}
return (res);
}