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29 * $FreeBSD: src/lib/libcompat/4.3/rexec.c,v 1.5.8.3 2000/11/22 13:36:00 ben Exp $
31 * @(#)rexec.c 8.1 (Berkeley) 6/4/93
34 #include <sys/types.h>
36 #include <sys/socket.h>
37 #include <sys/param.h>
40 #include <netinet/in.h>
51 #define SA_LEN(addr) ((addr)->sa_len)
52 #define __set_errno(val) errno = (val)
55 char *getpass(), *getlogin();
58 * Options and other state info.
61 char mac_name[9]; /* macro name */
62 char *mac_start; /* start of macro in macbuf */
63 char *mac_end; /* end of macro in macbuf */
66 int macnum; /* number of defined macros */
67 struct macel macros[16];
80 static char tokval[100];
82 static struct toktab {
86 { "default", DEFAULT },
88 { "password", PASSWD },
90 { "account", ACCOUNT },
103 if (feof(cfile) || ferror(cfile))
105 while ((c = getc(cfile)) != EOF &&
106 (c == '\n' || c == '\t' || c == ' ' || c == ','))
112 while ((c = getc(cfile)) != EOF && c != '"') {
119 while ((c = getc(cfile)) != EOF
120 && c != '\n' && c != '\t' && c != ' ' && c != ',') {
129 for (t = toktab; t->tokstr; t++)
130 if (!strcmp(t->tokstr, tokval))
136 ruserpass(char *host, const char **aname, const char **apass, char **aacct)
138 char *hdir, buf[BUFSIZ], *tmp;
139 char myname[MAXHOSTNAMELEN], *mydomain;
140 int t, i, c, usedefault = 0;
143 hdir = getenv("HOME");
146 if (strlen(hdir) + 8 > sizeof(buf))
148 (void) sprintf(buf, "%s/.netrc", hdir);
149 cfile = fopen(buf, "r");
155 if (gethostname(myname, sizeof(myname)) < 0)
157 if ((mydomain = strchr(myname, '.')) == NULL)
160 while ((t = token())) switch(t) {
171 * Allow match either for user's input host name
172 * or official hostname. Also allow match of
173 * incompletely-specified host in local domain.
175 if (strcasecmp(host, tokval) == 0)
177 if ((tmp = strchr(host, '.')) != NULL &&
178 strcasecmp(tmp, mydomain) == 0 &&
179 strncasecmp(host, tokval, tmp - host) == 0 &&
180 tokval[tmp - host] == '\0')
185 while ((t = token()) && t != MACH && t != DEFAULT) switch(t) {
189 if (*aname == NULL) {
191 tmp = malloc(strlen(tokval) + 1);
195 if (strcmp(*aname, tokval))
201 if ((*aname == NULL || strcmp(*aname, "anonymous")) &&
202 fstat(fileno(cfile), &stb) >= 0 &&
203 (stb.st_mode & 077) != 0) {
204 warnx("Error: .netrc file is readable by others.");
205 warnx("Remove password or make file unreadable by others.");
208 if (token() && *apass == NULL) {
210 tmp = malloc(strlen(tokval) + 1);
216 if (fstat(fileno(cfile), &stb) >= 0
217 && (stb.st_mode & 077) != 0) {
218 warnx("Error: .netrc file is readable by others.");
219 warnx("Remove account or make file unreadable by others.");
222 if (token() && *aacct == NULL) {
223 *aacct = malloc((unsigned) strlen(tokval) + 1);
224 (void) strcpy(*aacct, tokval);
228 while ((c=getc(cfile)) != EOF &&
229 (c == ' ' || c == '\t'))
231 if (c == EOF || c == '\n') {
232 printf("Missing macdef name argument.\n");
236 printf("Limit of 16 macros have already been defined\n");
239 tmp = macros[macnum].mac_name;
241 for (i=0; i < 8 && (c=getc(cfile)) != EOF &&
246 printf("Macro definition missing null line terminator.\n");
251 while ((c=getc(cfile)) != EOF && c != '\n');
254 printf("Macro definition missing null line terminator.\n");
258 macros[macnum].mac_start = macbuf;
261 macros[macnum].mac_start = macros[macnum-1].mac_end + 1;
263 tmp = macros[macnum].mac_start;
264 while (tmp != macbuf + 4096) {
265 if ((c=getc(cfile)) == EOF) {
266 printf("Macro definition missing null line terminator.\n");
271 if (*(tmp-1) == '\0') {
272 macros[macnum++].mac_end = tmp - 1;
279 if (tmp == macbuf + 4096) {
280 printf("4K macro buffer exceeded\n");
285 warnx("Unknown .netrc keyword %s", tokval);
291 (void) fclose(cfile);
294 (void) fclose(cfile);
299 rexec_af(char **ahost, int rport, const char *name, const char *pass,
300 const char *cmd, int *fd2p, sa_family_t *af)
302 struct sockaddr_storage sa2, from;
303 struct addrinfo hints, *res0;
304 const char *orig_name = name;
305 const char *orig_pass = pass;
306 static char *ahostbuf;
311 char servbuff[NI_MAXSERV];
313 snprintf(servbuff, sizeof(servbuff), "%d", ntohs(rport));
314 servbuff[sizeof(servbuff) - 1] = '\0';
316 memset(&hints, '\0', sizeof(hints));
318 hints.ai_family = *af;
319 hints.ai_socktype = SOCK_STREAM;
320 hints.ai_flags = AI_CANONNAME;
321 gai = getaddrinfo(*ahost, servbuff, &hints, &res0);
323 /* XXX: set errno? */
327 if (res0->ai_canonname){
329 ahostbuf = strdup (res0->ai_canonname);
330 if (ahostbuf == NULL) {
331 perror ("rexec: strdup");
337 __set_errno (ENOENT);
340 ruserpass(res0->ai_canonname, &name, &pass, 0);
342 s = socket(res0->ai_family, res0->ai_socktype, 0);
344 perror("rexec: socket");
347 if (connect(s, res0->ai_addr, res0->ai_addrlen) < 0) {
348 if (errno == ECONNREFUSED && timo <= 16) {
354 perror(res0->ai_canonname);
358 (void) write(s, "", 1);
365 s2 = socket(res0->ai_family, res0->ai_socktype, 0);
371 sa2len = sizeof (sa2);
372 if (getsockname(s2, (struct sockaddr *)&sa2, &sa2len) < 0) {
373 perror("getsockname");
376 } else if (sa2len != SA_LEN((struct sockaddr *)&sa2)) {
382 if (!getnameinfo((struct sockaddr *)&sa2, sa2len,
383 NULL, 0, servbuff, sizeof(servbuff),
385 port = atoi(servbuff);
386 (void) sprintf(num, "%u", port);
387 (void) write(s, num, strlen(num)+1);
388 { socklen_t len = sizeof (from);
389 s3 = accept(s2, (struct sockaddr *)&from,
401 (void) write(s, name, strlen(name) + 1);
402 /* should public key encypt the password here */
403 (void) write(s, pass, strlen(pass) + 1);
404 (void) write(s, cmd, strlen(cmd) + 1);
406 /* We don't need the memory allocated for the name and the password
407 in ruserpass anymore. */
408 if (name != orig_name)
409 free ((char *) name);
410 if (pass != orig_pass)
411 free ((char *) pass);
413 if (read(s, &c, 1) != 1) {
418 while (read(s, &c, 1) == 1) {
419 (void) write(2, &c, 1);
437 rexec(char **ahost, int rport, const char *name, const char *pass, char *cmd, int *fd2p)
439 struct sockaddr_in sin, sin2, from;
446 hp = gethostbyname(*ahost);
452 ruserpass(hp->h_name, &name, &pass, &acct);
456 s = socket(AF_INET, SOCK_STREAM, 0);
458 perror("rexec: socket");
461 sin.sin_family = hp->h_addrtype;
462 sin.sin_port = rport;
463 bcopy(hp->h_addr, (caddr_t)&sin.sin_addr, hp->h_length);
464 if (connect(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
465 if (errno == ECONNREFUSED && timo <= 16) {
475 (void) write(s, "", 1);
481 s2 = socket(AF_INET, SOCK_STREAM, 0);
487 sin2len = sizeof (sin2);
488 if (getsockname(s2, (struct sockaddr *)&sin2, &sin2len) < 0 ||
489 sin2len != sizeof (sin2)) {
490 perror("getsockname");
494 port = ntohs((u_short)sin2.sin_port);
495 (void) sprintf(num, "%hu", port);
496 (void) write(s, num, strlen(num)+1);
497 { int len = sizeof (from);
498 s3 = accept(s2, (struct sockaddr *)&from, &len);
508 (void) write(s, name, strlen(name) + 1);
509 /* should public key encypt the password here */
510 (void) write(s, pass, strlen(pass) + 1);
511 (void) write(s, cmd, strlen(cmd) + 1);
512 if (read(s, &c, 1) != 1) {
517 while (read(s, &c, 1) == 1) {
518 (void) write(2, &c, 1);