2 * Copyright 2000, International Business Machines Corporation and others.
5 * This software has been released under the terms of the IBM Public
6 * License. For details, see the LICENSE file in the top-level source
7 * directory or online at http://www.openafs.org/dl/license10.html
11 * This module (residing in lib/afs/librmtsys.a) implements the client side of
12 * the rpc version (via rx) of non-standard system calls. Currently only rpc
13 * calls of setpag, and pioctl are supported.
15 #include <afsconfig.h>
16 #include <afs/param.h>
26 #include "sys_prototypes.h"
29 #define NOPAG 0xffffffff /* Also defined in afs/afs.h */
30 static afs_int32 hostAddr = 0;
31 static int hostAddrLookup = 0;
32 char *afs_server = 0, server_name[128];
33 static afs_int32 SetClientCreds(struct clientcred *creds, afs_uint32 * groups);
34 int afs_get_pag_from_groups(afs_uint32 g0, afs_uint32 g1);
35 void afs_get_groups_from_pag(afs_uint32 pag, afs_uint32 * g0p, afs_uint32 * g1p);
37 /* Picks up the name of the remote afs client host where the rmtsys
38 * daemon resides. Since the clients may be diskless and/or readonly
39 * ones we felt it's better to rely on an shell environment
40 * (AFSSERVER) for the host name first. If that is not set, the
41 * $HOME/.AFSSERVER file is checked, otherwise the "/.AFSSERVER" is
45 GetAfsServerAddr(char *syscall)
50 /* Take advantage of caching and assume that the remote host
51 * address won't change during a single program's invocation.
57 if (!(afs_server = getenv("AFSSERVER"))) {
62 if (!(home_dir = getenv("HOME"))) {
63 /* Our last chance is the "/.AFSSERVER" file */
64 fp = fopen("/.AFSSERVER", "r");
68 fgets(server_name, 128, fp);
73 asprintf(&pathname, "%s/%s", home_dir, ".AFSSERVER");
76 fp = fopen(pathname, "r");
80 /* Our last chance is the "/.AFSSERVER" file */
81 fp = fopen("/.AFSSERVER", "r");
86 fgets(server_name, 128, fp);
89 len = strlen(server_name);
93 if (server_name[len - 1] == '\n') {
94 server_name[len - 1] = 0;
96 afs_server = server_name;
98 th = gethostbyname(afs_server);
100 printf("host %s not found; %s call aborted\n", afs_server, syscall);
103 memcpy(&hostAddr, th->h_addr, sizeof(hostAddr));
108 /* Does the actual RX connection to the afs server */
109 struct rx_connection *
110 rx_connection(afs_int32 * errorcode, char *syscall)
112 struct rx_connection *conn;
113 struct rx_securityClass *null_securityObject;
116 if (!(host = GetAfsServerAddr(syscall))) {
118 return (struct rx_connection *)0;
120 *errorcode = rx_Init(0);
122 printf("Rx initialize failed \n");
123 return (struct rx_connection *)0;
125 null_securityObject = rxnull_NewClientSecurityObject();
127 rx_NewConnection(host, htons(AFSCONF_RMTSYSPORT), RMTSYS_SERVICEID,
128 null_securityObject, 0);
130 printf("Unable to make a new connection\n");
132 return (struct rx_connection *)0;
138 /* WARNING: The calling program (i.e. klog) MUST be suid-root since we need to
139 * do a setgroups(2) call with the new pag.... */
141 #pragma weak setpag = afs_setpag
149 struct rx_connection *conn;
151 afs_int32 errorcode, errornumber, newpag, ngroups, j;
152 afs_uint32 groups[NGROUPS_MAX];
154 if (!(conn = rx_connection(&errorcode, "setpag"))) {
155 /* Remote call can't be performed for some reason.
156 * Try the local 'setpag' system call ... */
157 errorcode = lsetpag();
160 ngroups = SetClientCreds(&creds, groups);
161 errorcode = RMTSYS_SetPag(conn, &creds, &newpag, &errornumber);
165 printf("Warning: Remote setpag to %s has failed (err=%d)...\n",
171 if (afs_get_pag_from_groups(groups[0], groups[1]) == NOPAG) {
172 /* we will have to shift grouplist to make room for pag */
173 if (ngroups + 2 > NGROUPS_MAX) {
174 /* this is what the real setpag returns */
178 for (j = ngroups - 1; j >= 0; j--) {
179 groups[j + 2] = groups[j];
183 afs_get_groups_from_pag(newpag, &groups[0], &groups[1]);
184 if (setgroups(ngroups, groups) == -1) {
188 errorcode = setuid(getuid());
190 errorcode = setreuid(-1, getuid());
191 #endif /* AFS_HPUX_ENV */
196 /* Remote pioctl(2) client routine */
198 #pragma weak pioctl = afs_pioctl
200 afs_pioctl(char *path, afs_int32 cmd, struct ViceIoctl *data,
204 pioctl(char *path, afs_int32 cmd, struct ViceIoctl *data, afs_int32 follow)
207 struct rx_connection *conn;
209 afs_int32 errorcode, errornumber, ins = data->in_size;
210 afs_uint32 groups[NGROUPS_MAX];
211 rmtbulk InData, OutData;
212 char pathname[256], *pathp = pathname, *inbuffer;
213 if (!(conn = rx_connection(&errorcode, "pioctl"))) {
214 /* Remote call can't be performed for some reason.
215 * Try the local 'pioctl' system call ... */
216 errorcode = lpioctl(path, cmd, data, follow);
219 (void)SetClientCreds(&creds, groups);
224 if (!(inbuffer = malloc(ins)))
225 return (-1); /* helpless here */
227 memcpy(inbuffer, data->in, data->in_size);
228 InData.rmtbulk_len = data->in_size;
229 InData.rmtbulk_val = inbuffer;
230 inparam_conversion(cmd, InData.rmtbulk_val, 0);
232 OutData.rmtbulk_len = MAXBUFFERLEN * sizeof(*OutData.rmtbulk_val);
233 OutData.rmtbulk_val = malloc(OutData.rmtbulk_len);
234 if (!OutData.rmtbulk_val) {
239 /* We always need to pass absolute pathnames to the remote pioctl since we
240 * lose the current directory value when doing an rpc call. Below we
241 * prepend the current absolute path directory, if the name is relative */
244 /* assuming relative path name */
245 if (getcwd(pathname, 256) == NULL) {
247 printf("getwd failed\n");
250 strcpy(pathname + strlen(pathname), "/");
251 strcat(pathname, path);
253 strcpy(pathname, path);
256 /* Special meaning for a "NULL" pathname since xdr_string hates nil
257 * pointers, at least on non-RTS; of course the proper solution would
258 * be to change the interface declartion. */
259 strcpy(pathname, NIL_PATHP);
262 RMTSYS_Pioctl(conn, &creds, pathp, cmd, follow, &InData, &OutData,
266 errorcode = -1; /* Necessary since errorcode is 0 on
267 * standard remote pioctl errors */
268 if (errno != EDOM && errno != EACCES)
269 printf("Warning: Remote pioctl to %s has failed (err=%d)...\n",
273 /* Do the conversions back to the host order; store the results back
274 * on the same buffer */
275 if (data->out_size < OutData.rmtbulk_len) {
279 memcpy(data->out, OutData.rmtbulk_val, data->out_size);
280 outparam_conversion(cmd, data->out, 1);
283 free(OutData.rmtbulk_val);
290 afs_get_pag_from_groups(afs_uint32 g0, afs_uint32 g1)
292 afs_uint32 h, l, result;
296 if (g0 < 0xc000 && g1 < 0xc000) {
297 l = ((g0 & 0x3fff) << 14) | (g1 & 0x3fff);
299 h = (g1 >> 14) + h + h + h;
300 result = ((h << 28) | l);
301 /* Additional testing */
302 if (((result >> 24) & 0xff) == 'A')
311 afs_get_groups_from_pag(afs_uint32 pag, afs_uint32 * g0p, afs_uint32 * g1p)
313 unsigned short g0, g1;
316 g0 = 0x3fff & (pag >> 14);
318 g0 |= ((pag >> 28) / 3) << 14;
319 g1 |= ((pag >> 28) % 3) << 14;
326 SetClientCreds(struct clientcred *creds, afs_uint32 * groups)
330 creds->uid = getuid();
331 groups[0] = groups[1] = 0;
332 ngroups = getgroups(NGROUPS_MAX, groups);
333 creds->group0 = groups[0];
334 creds->group1 = groups[1];