102 lines
2.3 KiB
C
102 lines
2.3 KiB
C
/* Copyright (c) 1999 SuSE GmbH Nuerenberg, Germany
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Author: Thorsten Kukuk <kukuk@suse.de> */
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#include <assert.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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/* Version number of the daemon interface */
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#define NSCD_VERSION 2
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/* Path for the Unix domain socket. */
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#define _PATH_NSCDSOCKET "/var/run/nscd/socket"
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#define _PATH_NSCDSOCKET_OLD "/var/run/.nscd_socket"
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/* Available services. */
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typedef enum {
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GETPWBYNAME,
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GETPWBYUID,
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GETGRBYNAME,
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GETGRBYGID,
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GETHOSTBYNAME,
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GETHOSTBYNAMEv6,
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GETHOSTBYADDR,
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GETHOSTBYADDRv6,
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LASTDBREQ = GETHOSTBYADDRv6,
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SHUTDOWN, /* Shut the server down. */
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GETSTAT, /* Get the server statistic. */
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INVALIDATE, /* Invalidate one special cache. */
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LASTREQ
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} request_type;
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/* Header common to all requests */
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typedef struct {
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int version; /* Version number of the daemon interface. */
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request_type type; /* Service requested. */
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#if defined(__alpha__)
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int64_t key_len; /* Key length is 64bit on Alpha. */
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#else
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int32_t key_len; /* Key length, 32bit on most plattforms. */
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#endif
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} request_header;
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/* Create a socket connected to a name. */
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static int nscd_open_socket (void)
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{
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struct sockaddr_un addr;
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int sock;
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sock = socket (PF_UNIX, SOCK_STREAM, 0);
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if (sock < 0)
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return -1;
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addr.sun_family = AF_UNIX;
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assert (sizeof (addr.sun_path) >= sizeof (_PATH_NSCDSOCKET));
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strcpy (addr.sun_path, _PATH_NSCDSOCKET);
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if (connect (sock, (struct sockaddr *) &addr, sizeof (addr)) < 0) {
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addr.sun_family = AF_UNIX;
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assert (sizeof (addr.sun_path) >=
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sizeof (_PATH_NSCDSOCKET_OLD));
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strcpy (addr.sun_path, _PATH_NSCDSOCKET_OLD);
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if (connect (sock, (struct sockaddr *) &addr, sizeof (addr)) <
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0) {
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close (sock);
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return -1;
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}
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}
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return sock;
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}
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/*
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* nscd_flush_cache - flush specyfied service bufor in nscd cache
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*/
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int nscd_flush_cache (char *service)
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{
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int sock = nscd_open_socket ();
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request_header req;
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struct iovec iov[2];
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ssize_t nbytes;
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if (sock == -1)
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return -1;
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req.version = NSCD_VERSION;
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req.type = INVALIDATE;
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req.key_len = strlen (service) + 1;
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iov[0].iov_base = &req;
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iov[0].iov_len = sizeof (req);
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iov[1].iov_base = service;
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iov[1].iov_len = req.key_len;
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nbytes = writev (sock, iov, 2);
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close (sock);
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return (nbytes != iov[0].iov_len + iov[1].iov_len ? (-1) : 0);
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}
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