#include <mount.h>
#include <unistd.h>
+#include "nfsrpc.h"
+
#define TIMEOUT_UDP 3
-#define TIMEOUT_TCP 10
#define TOTAL_TIMEOUT 20
static char * version = "showmount for " VERSION;
exit(n);
}
+#ifdef HAVE_CLNT_CREATE
+
+static const char *nfs_sm_pgmtbl[] = {
+ "showmount",
+ "mount",
+ "mountd",
+ NULL,
+};
+
+/*
+ * Generate an RPC client handle connected to the mountd service
+ * at @hostname, or die trying.
+ *
+ * Supports both AF_INET and AF_INET6 server addresses.
+ */
+static CLIENT *nfs_get_mount_client(const char *hostname)
+{
+ rpcprog_t program = nfs_getrpcbyname(MOUNTPROG, nfs_sm_pgmtbl);
+ CLIENT *client;
+
+ client = clnt_create(hostname, program, MOUNTVERS, "tcp");
+ if (client)
+ return client;
+
+ client = clnt_create(hostname, program, MOUNTVERS, "udp");
+ if (client)
+ return client;
+
+ clnt_pcreateerror("clnt_create");
+ exit(1);
+}
+
+#else /* HAVE_CLNT_CREATE */
+
/*
* Perform a non-blocking connect on the socket fd.
*
* tout contains the timeout. It will be modified to contain the time
* remaining (i.e. time provided - time elasped).
+ *
+ * Returns zero on success; otherwise, -1 is returned and errno is set
+ * to reflect the nature of the error.
*/
static int connect_nb(int fd, struct sockaddr_in *addr, struct timeval *tout)
{
len = sizeof(struct sockaddr);
ret = connect(fd, (struct sockaddr *)addr, len);
if (ret < 0 && errno != EINPROGRESS) {
- ret = -errno;
+ ret = -1;
goto done;
}
ret = select(fd + 1, NULL, &rset, NULL, tout);
if (ret <= 0) {
if (ret == 0)
- ret = -ETIMEDOUT;
- else
- ret = -errno;
+ errno = ETIMEDOUT;
+ ret = -1;
goto done;
}
len = sizeof(ret);
status = getsockopt(fd, SOL_SOCKET, SO_ERROR, &ret, &len);
if (status < 0) {
- ret = -errno;
+ ret = -1;
goto done;
}
/* Oops - something wrong with connect */
- if (ret)
- ret = -ret;
+ if (ret != 0) {
+ errno = ret;
+ ret = -1;
+ }
}
done:
return ret;
}
-static unsigned short getport(struct sockaddr_in *addr,
- unsigned long prog, unsigned long vers, int prot)
+/*
+ * Generate an RPC client handle connected to the mountd service
+ * at @hostname, or die trying.
+ *
+ * Supports only AF_INET server addresses.
+ */
+static CLIENT *nfs_get_mount_client(const char *hostname)
{
- CLIENT *client;
- enum clnt_stat status;
- struct pmap parms;
- int ret, sock;
- struct sockaddr_in laddr, saddr;
- struct timeval tout = {0, 0};
- socklen_t len;
- unsigned int send_sz = 0;
- unsigned int recv_sz = 0;
- unsigned short port;
-
- memset(&laddr, 0, sizeof(laddr));
- memset(&saddr, 0, sizeof(saddr));
- memset(&parms, 0, sizeof(parms));
-
- memcpy(&saddr, addr, sizeof(saddr));
- saddr.sin_port = htons(PMAPPORT);
-
- if (prot == IPPROTO_TCP) {
- sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
- if (sock == -1) {
- rpc_createerr.cf_stat = RPC_SYSTEMERROR;
- rpc_createerr.cf_error.re_errno = errno;
- return 0;
- }
-
- tout.tv_sec = TIMEOUT_TCP;
-
- ret = connect_nb(sock, &saddr, &tout);
- if (ret == -1) {
- close(sock);
- rpc_createerr.cf_stat = RPC_SYSTEMERROR;
- rpc_createerr.cf_error.re_errno = errno;
- return 0;
- }
- client = clnttcp_create(&saddr,
- PMAPPROG, PMAPVERS, &sock,
- 0, 0);
- } else {
- /*
- * bind to any unused port. If we left this up to the rpc
- * layer, it would bind to a reserved port, which has been shown
- * to exhaust the reserved port range in some situations.
- */
- sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
- if (sock == -1) {
- rpc_createerr.cf_stat = RPC_SYSTEMERROR;
- rpc_createerr.cf_error.re_errno = errno;
- return 0;
- }
-
- laddr.sin_family = AF_INET;
- laddr.sin_port = 0;
- laddr.sin_addr.s_addr = htonl(INADDR_ANY);
-
- tout.tv_sec = TIMEOUT_UDP;
-
- send_sz = RPCSMALLMSGSIZE;
- recv_sz = RPCSMALLMSGSIZE;
+ struct hostent *hp;
+ struct sockaddr_in server_addr;
+ struct timeval pertry_timeout;
+ CLIENT *mclient = NULL;
+ int ret, msock;
- len = sizeof(struct sockaddr_in);
- if (bind(sock, (struct sockaddr *)&laddr, len) < 0) {
- close(sock);
- sock = RPC_ANYSOCK;
- /* FALLTHROUGH */
+ if (inet_aton(hostname, &server_addr.sin_addr)) {
+ server_addr.sin_family = AF_INET;
+ }
+ else {
+ if ((hp = gethostbyname(hostname)) == NULL) {
+ fprintf(stderr, "%s: can't get address for %s\n",
+ program_name, hostname);
+ exit(1);
}
- client = clntudp_bufcreate(&saddr, PMAPPROG, PMAPVERS,
- tout, &sock, send_sz, recv_sz);
+ server_addr.sin_family = AF_INET;
+ memcpy(&server_addr.sin_addr, hp->h_addr, hp->h_length);
}
- if (!client) {
- close(sock);
- rpc_createerr.cf_stat = RPC_RPCBFAILURE;
- return 0;
+ msock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
+ if (msock != -1) {
+ if (nfs_getport_ping((struct sockaddr *)&server_addr,
+ sizeof(server_addr), MOUNTPROG,
+ MOUNTVERS, IPPROTO_TCP)) {
+ ret = connect_nb(msock, &server_addr, 0);
+ if (ret == 0)
+ mclient = clnttcp_create(&server_addr,
+ MOUNTPROG, MOUNTVERS, &msock,
+ 0, 0);
+ else
+ close(msock);
+ } else
+ close(msock);
}
- clnt_control(client, CLSET_FD_CLOSE, NULL);
-
- parms.pm_prog = prog;
- parms.pm_vers = vers;
- parms.pm_prot = prot;
-
- status = clnt_call(client, PMAPPROC_GETPORT,
- (xdrproc_t) xdr_pmap, (caddr_t) &parms,
- (xdrproc_t) xdr_u_short, (caddr_t) &port,
- tout);
-
- if (status != RPC_SUCCESS) {
- clnt_geterr(client, &rpc_createerr.cf_error);
- rpc_createerr.cf_stat = status;
- clnt_destroy(client);
- return 0;
- } else if (port == 0) {
- rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
+ if (!mclient) {
+ if (nfs_getport_ping((struct sockaddr *)&server_addr,
+ sizeof(server_addr), MOUNTPROG,
+ MOUNTVERS, IPPROTO_UDP)) {
+ clnt_pcreateerror("showmount");
+ exit(1);
+ }
+ msock = RPC_ANYSOCK;
+ pertry_timeout.tv_sec = TIMEOUT_UDP;
+ pertry_timeout.tv_usec = 0;
+ if ((mclient = clntudp_create(&server_addr,
+ MOUNTPROG, MOUNTVERS, pertry_timeout, &msock)) == NULL) {
+ clnt_pcreateerror("mount clntudp_create");
+ exit(1);
+ }
}
- clnt_destroy(client);
-
- return htons(port);
+ return mclient;
}
+#endif /* HAVE_CLNT_CREATE */
+
int main(int argc, char **argv)
{
char hostname_buf[MAXHOSTLEN];
char *hostname;
enum clnt_stat clnt_stat;
- struct hostent *hp;
- struct sockaddr_in server_addr;
- int ret, msock;
struct timeval total_timeout;
- struct timeval pertry_timeout;
int c;
CLIENT *mclient;
groups grouplist;
break;
}
- if (inet_aton(hostname, &server_addr.sin_addr)) {
- server_addr.sin_family = AF_INET;
- }
- else {
- if ((hp = gethostbyname(hostname)) == NULL) {
- fprintf(stderr, "%s: can't get address for %s\n",
- program_name, hostname);
- exit(1);
- }
- server_addr.sin_family = AF_INET;
- memcpy(&server_addr.sin_addr, hp->h_addr, hp->h_length);
- }
-
- /* create mount deamon client */
-
- mclient = NULL;
- msock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
- if (msock != -1) {
- server_addr.sin_port = getport(&server_addr,
- MOUNTPROG, MOUNTVERS, IPPROTO_TCP);
- if (server_addr.sin_port) {
- ret = connect_nb(msock, &server_addr, 0);
- if (ret != -1)
- mclient = clnttcp_create(&server_addr,
- MOUNTPROG, MOUNTVERS, &msock,
- 0, 0);
- else
- close(msock);
- } else
- close(msock);
- }
-
- if (!mclient) {
- server_addr.sin_port = getport(&server_addr,
- MOUNTPROG, MOUNTVERS, IPPROTO_UDP);
- if (!server_addr.sin_port) {
- clnt_pcreateerror("showmount");
- exit(1);
- }
- msock = RPC_ANYSOCK;
- pertry_timeout.tv_sec = TIMEOUT_UDP;
- pertry_timeout.tv_usec = 0;
- if ((mclient = clntudp_create(&server_addr,
- MOUNTPROG, MOUNTVERS, pertry_timeout, &msock)) == NULL) {
- clnt_pcreateerror("mount clntudp_create");
- exit(1);
- }
- }
+ mclient = nfs_get_mount_client(hostname);
mclient->cl_auth = authunix_create_default();
total_timeout.tv_sec = TOTAL_TIMEOUT;
total_timeout.tv_usec = 0;
total_timeout);
if (clnt_stat != RPC_SUCCESS) {
clnt_perror(mclient, "rpc mount export");
+ clnt_destroy(mclient);
exit(1);
}
if (headers)
printf("\n");
exportlist = exportlist->ex_next;
}
+ clnt_destroy(mclient);
exit(0);
}
total_timeout);
if (clnt_stat != RPC_SUCCESS) {
clnt_perror(mclient, "rpc mount dump");
+ clnt_destroy(mclient);
exit(1);
}
+ clnt_destroy(mclient);
n = 0;
for (list = dumplist; list; list = list->ml_next)
projects / nfs-utils.git / blobdiff