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15 * This product includes software developed by the University of
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33 * $FreeBSD: src/lib/libcompat/4.3/rexec.c,v 1.5.8.3 2000/11/22 13:36:00 ben Exp $
34 * $DragonFly: src/lib/libcompat/4.3/rexec.c,v 1.6 2008/10/05 18:26:41 swildner Exp $
36 * @(#)rexec.c 8.1 (Berkeley) 6/4/93
39 #include <sys/types.h>
41 #include <sys/socket.h>
42 #include <sys/param.h>
45 #include <netinet/in.h>
58 char *getpass(), *getlogin();
61 * Options and other state info.
64 char mac_name[9]; /* macro name */
65 char *mac_start; /* start of macro in macbuf */
66 char *mac_end; /* end of macro in macbuf */
69 int macnum; /* number of defined macros */
70 struct macel macros[16];
83 static char tokval[100];
85 static struct toktab {
89 { "default", DEFAULT },
91 { "password", PASSWD },
93 { "account", ACCOUNT },
106 if (feof(cfile) || ferror(cfile))
108 while ((c = getc(cfile)) != EOF &&
109 (c == '\n' || c == '\t' || c == ' ' || c == ','))
115 while ((c = getc(cfile)) != EOF && c != '"') {
122 while ((c = getc(cfile)) != EOF
123 && c != '\n' && c != '\t' && c != ' ' && c != ',') {
132 for (t = toktab; t->tokstr; t++)
133 if (!strcmp(t->tokstr, tokval))
139 ruserpass(char *host, const char **aname, const char **apass, char **aacct)
141 char *hdir, buf[BUFSIZ], *tmp;
142 char myname[MAXHOSTNAMELEN], *mydomain;
143 int t, i, c, usedefault = 0;
146 hdir = getenv("HOME");
149 if (strlen(hdir) + 8 > sizeof(buf))
151 (void) sprintf(buf, "%s/.netrc", hdir);
152 cfile = fopen(buf, "r");
158 if (gethostname(myname, sizeof(myname)) < 0)
160 if ((mydomain = strchr(myname, '.')) == NULL)
163 while ((t = token())) switch(t) {
174 * Allow match either for user's input host name
175 * or official hostname. Also allow match of
176 * incompletely-specified host in local domain.
178 if (strcasecmp(host, tokval) == 0)
180 if ((tmp = strchr(host, '.')) != NULL &&
181 strcasecmp(tmp, mydomain) == 0 &&
182 strncasecmp(host, tokval, tmp - host) == 0 &&
183 tokval[tmp - host] == '\0')
188 while ((t = token()) && t != MACH && t != DEFAULT) switch(t) {
192 if (*aname == NULL) {
194 tmp = malloc(strlen(tokval) + 1);
198 if (strcmp(*aname, tokval))
203 if ((*aname == 0 || strcmp(*aname, "anonymous")) &&
204 fstat(fileno(cfile), &stb) >= 0 &&
205 (stb.st_mode & 077) != 0) {
206 warnx("Error: .netrc file is readable by others.");
207 warnx("Remove password or make file unreadable by others.");
210 if (token() && *apass == 0) {
212 tmp = malloc(strlen(tokval) + 1);
218 if (fstat(fileno(cfile), &stb) >= 0
219 && (stb.st_mode & 077) != 0) {
220 warnx("Error: .netrc file is readable by others.");
221 warnx("Remove account or make file unreadable by others.");
224 if (token() && *aacct == 0) {
225 *aacct = malloc((unsigned) strlen(tokval) + 1);
226 (void) strcpy(*aacct, tokval);
230 while ((c=getc(cfile)) != EOF &&
231 (c == ' ' || c == '\t'))
233 if (c == EOF || c == '\n') {
234 printf("Missing macdef name argument.\n");
238 printf("Limit of 16 macros have already been defined\n");
241 tmp = macros[macnum].mac_name;
243 for (i=0; i < 8 && (c=getc(cfile)) != EOF &&
248 printf("Macro definition missing null line terminator.\n");
253 while ((c=getc(cfile)) != EOF && c != '\n');
256 printf("Macro definition missing null line terminator.\n");
260 macros[macnum].mac_start = macbuf;
263 macros[macnum].mac_start = macros[macnum-1].mac_end + 1;
265 tmp = macros[macnum].mac_start;
266 while (tmp != macbuf + 4096) {
267 if ((c=getc(cfile)) == EOF) {
268 printf("Macro definition missing null line terminator.\n");
273 if (*(tmp-1) == '\0') {
274 macros[macnum++].mac_end = tmp - 1;
281 if (tmp == macbuf + 4096) {
282 printf("4K macro buffer exceeded\n");
287 warnx("Unknown .netrc keyword %s", tokval);
293 (void) fclose(cfile);
296 (void) fclose(cfile);
301 rexec_af(char **ahost, int rport, const char *name, const char *pass,
302 const char *cmd, int *fd2p, sa_family_t *af)
304 struct sockaddr_storage sa2, from;
305 struct addrinfo hints, *res0;
306 const char *orig_name = name;
307 const char *orig_pass = pass;
308 static char *ahostbuf;
313 char servbuff[NI_MAXSERV];
315 snprintf(servbuff, sizeof(servbuff), "%d", ntohs(rport));
316 servbuff[sizeof(servbuff) - 1] = '\0';
318 memset(&hints, '\0', sizeof(hints));
320 hints.ai_family = *af;
321 hints.ai_socktype = SOCK_STREAM;
322 hints.ai_flags = AI_CANONNAME;
323 gai = getaddrinfo(*ahost, servbuff, &hints, &res0);
325 /* XXX: set errno? */
329 if (res0->ai_canonname){
331 ahostbuf = strdup (res0->ai_canonname);
332 if (ahostbuf == NULL) {
333 perror ("rexec: strdup");
339 __set_errno (ENOENT);
342 ruserpass(res0->ai_canonname, &name, &pass, 0);
344 s = socket(res0->ai_family, res0->ai_socktype, 0);
346 perror("rexec: socket");
349 if (connect(s, res0->ai_addr, res0->ai_addrlen) < 0) {
350 if (errno == ECONNREFUSED && timo <= 16) {
356 perror(res0->ai_canonname);
360 (void) write(s, "", 1);
367 s2 = socket(res0->ai_family, res0->ai_socktype, 0);
373 sa2len = sizeof (sa2);
374 if (getsockname(s2, (struct sockaddr *)&sa2, &sa2len) < 0) {
375 perror("getsockname");
378 } else if (sa2len != SA_LEN((struct sockaddr *)&sa2)) {
384 if (!getnameinfo((struct sockaddr *)&sa2, sa2len,
385 NULL, 0, servbuff, sizeof(servbuff),
387 port = atoi(servbuff);
388 (void) sprintf(num, "%u", port);
389 (void) write(s, num, strlen(num)+1);
390 { socklen_t len = sizeof (from);
391 s3 = accept(s2, (struct sockaddr *)&from,
403 (void) write(s, name, strlen(name) + 1);
404 /* should public key encypt the password here */
405 (void) write(s, pass, strlen(pass) + 1);
406 (void) write(s, cmd, strlen(cmd) + 1);
408 /* We don't need the memory allocated for the name and the password
409 in ruserpass anymore. */
410 if (name != orig_name)
411 free ((char *) name);
412 if (pass != orig_pass)
413 free ((char *) pass);
415 if (read(s, &c, 1) != 1) {
420 while (read(s, &c, 1) == 1) {
421 (void) write(2, &c, 1);
439 rexec(char **ahost, int rport, const char *name, const char *pass, char *cmd, int *fd2p)
441 struct sockaddr_in sin, sin2, from;
448 hp = gethostbyname(*ahost);
454 ruserpass(hp->h_name, &name, &pass, &acct);
458 s = socket(AF_INET, SOCK_STREAM, 0);
460 perror("rexec: socket");
463 sin.sin_family = hp->h_addrtype;
464 sin.sin_port = rport;
465 bcopy(hp->h_addr, (caddr_t)&sin.sin_addr, hp->h_length);
466 if (connect(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
467 if (errno == ECONNREFUSED && timo <= 16) {
477 (void) write(s, "", 1);
483 s2 = socket(AF_INET, SOCK_STREAM, 0);
489 sin2len = sizeof (sin2);
490 if (getsockname(s2, (struct sockaddr *)&sin2, &sin2len) < 0 ||
491 sin2len != sizeof (sin2)) {
492 perror("getsockname");
496 port = ntohs((u_short)sin2.sin_port);
497 (void) sprintf(num, "%u", port);
498 (void) write(s, num, strlen(num)+1);
499 { int len = sizeof (from);
500 s3 = accept(s2, (struct sockaddr *)&from, &len);
510 (void) write(s, name, strlen(name) + 1);
511 /* should public key encypt the password here */
512 (void) write(s, pass, strlen(pass) + 1);
513 (void) write(s, cmd, strlen(cmd) + 1);
514 if (read(s, &c, 1) != 1) {
519 while (read(s, &c, 1) == 1) {
520 (void) write(2, &c, 1);