BINDRESVPORT(3) | Linux Programmer's Manual | BINDRESVPORT(3) |
NAME
bindresvport - bind a socket to a privileged IP portSYNOPSIS
#include<sys/types.h> #include
<netinet/in.h>
int bindresvport(int sockfd, struct sockaddr_in *sin);
DESCRIPTION
bindresvport() is used to bind a socket descriptor to a privileged anonymous IP port, that is, a port number arbitrarily selected from the range 512 to 1023.RETURN VALUE
bindresvport() returns 0 on success; otherwise -1 is returned and errno set to indicate the cause of the error.ERRORS
bindresvport() can fail for any of the same reasons as bind(2). In addition, the following errors may occur:- EACCES
- The caller did not have superuser privilege (to be precise: the CAP_NET_BIND_SERVICE capability is required).
- EADDRINUSE
- All privileged ports are in use.
- EAFNOSUPPORT ( EPFNOSUPPORT in glibc 2.7 and earlier)
- sin is not NULL and sin->sin_family is not AF_INET.
ATTRIBUTES
Multithreading (see pthreads(7))
Before glibc 2.17, the bindresvport() function uses a static variable that is not protected, so it is not thread-safe.CONFORMING TO
Not in POSIX.1-2001. Present on the BSDs, Solaris, and many other systems.NOTES
Unlike some bindresvport() implementations, the glibc implementation ignores any value that the caller supplies in sin->sin_port.SEE ALSO
bind(2), getsockname(2)COLOPHON
This page is part of release 3.53 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.2013-06-21 |