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Annotation of 43BSDReno/lib/libcompat/4.3/rexec.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1980 Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms are permitted
                      6:  * provided that: (1) source distributions retain this entire copyright
                      7:  * notice and comment, and (2) distributions including binaries display
                      8:  * the following acknowledgement:  ``This product includes software
                      9:  * developed by the University of California, Berkeley and its contributors''
                     10:  * in the documentation or other materials provided with the distribution
                     11:  * and in all advertising materials mentioning features or use of this
                     12:  * software. Neither the name of the University nor the names of its
                     13:  * contributors may be used to endorse or promote products derived
                     14:  * from this software without specific prior written permission.
                     15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     16:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     18:  */
                     19: 
                     20: #if defined(LIBC_SCCS) && !defined(lint)
                     21: static char sccsid[] = "@(#)rexec.c    5.8 (Berkeley) 6/1/90";
                     22: #endif /* LIBC_SCCS and not lint */
                     23: 
                     24: #include <sys/types.h>
                     25: #include <sys/socket.h>
                     26: 
                     27: #include <netinet/in.h>
                     28: 
                     29: #include <stdio.h>
                     30: #include <netdb.h>
                     31: #include <errno.h>
                     32: 
                     33: extern errno;
                     34: char   *index();
                     35: int    rexecoptions;
                     36: char   *getpass(), *getlogin();
                     37: 
                     38: rexec(ahost, rport, name, pass, cmd, fd2p)
                     39:        char **ahost;
                     40:        int rport;
                     41:        char *name, *pass, *cmd;
                     42:        int *fd2p;
                     43: {
                     44:        struct sockaddr_in sin, sin2, from;
                     45:        struct hostent *hp;
                     46:        u_short port;
                     47:        int s, timo = 1, s3;
                     48:        char c;
                     49: 
                     50:        hp = gethostbyname(*ahost);
                     51:        if (hp == 0) {
                     52:                herror(*ahost);
                     53:                return (-1);
                     54:        }
                     55:        *ahost = hp->h_name;
                     56:        ruserpass(hp->h_name, &name, &pass);
                     57: retry:
                     58:        s = socket(AF_INET, SOCK_STREAM, 0);
                     59:        if (s < 0) {
                     60:                perror("rexec: socket");
                     61:                return (-1);
                     62:        }
                     63:        sin.sin_family = hp->h_addrtype;
                     64:        sin.sin_port = rport;
                     65:        bcopy(hp->h_addr, (caddr_t)&sin.sin_addr, hp->h_length);
                     66:        if (connect(s, &sin, sizeof(sin)) < 0) {
                     67:                if (errno == ECONNREFUSED && timo <= 16) {
                     68:                        (void) close(s);
                     69:                        sleep(timo);
                     70:                        timo *= 2;
                     71:                        goto retry;
                     72:                }
                     73:                perror(hp->h_name);
                     74:                return (-1);
                     75:        }
                     76:        if (fd2p == 0) {
                     77:                (void) write(s, "", 1);
                     78:                port = 0;
                     79:        } else {
                     80:                char num[8];
                     81:                int s2, sin2len;
                     82:                
                     83:                s2 = socket(AF_INET, SOCK_STREAM, 0);
                     84:                if (s2 < 0) {
                     85:                        (void) close(s);
                     86:                        return (-1);
                     87:                }
                     88:                listen(s2, 1);
                     89:                sin2len = sizeof (sin2);
                     90:                if (getsockname(s2, (char *)&sin2, &sin2len) < 0 ||
                     91:                  sin2len != sizeof (sin2)) {
                     92:                        perror("getsockname");
                     93:                        (void) close(s2);
                     94:                        goto bad;
                     95:                }
                     96:                port = ntohs((u_short)sin2.sin_port);
                     97:                (void) sprintf(num, "%u", port);
                     98:                (void) write(s, num, strlen(num)+1);
                     99:                { int len = sizeof (from);
                    100:                  s3 = accept(s2, &from, &len, 0);
                    101:                  close(s2);
                    102:                  if (s3 < 0) {
                    103:                        perror("accept");
                    104:                        port = 0;
                    105:                        goto bad;
                    106:                  }
                    107:                }
                    108:                *fd2p = s3;
                    109:        }
                    110:        (void) write(s, name, strlen(name) + 1);
                    111:        /* should public key encypt the password here */
                    112:        (void) write(s, pass, strlen(pass) + 1);
                    113:        (void) write(s, cmd, strlen(cmd) + 1);
                    114:        if (read(s, &c, 1) != 1) {
                    115:                perror(*ahost);
                    116:                goto bad;
                    117:        }
                    118:        if (c != 0) {
                    119:                while (read(s, &c, 1) == 1) {
                    120:                        (void) write(2, &c, 1);
                    121:                        if (c == '\n')
                    122:                                break;
                    123:                }
                    124:                goto bad;
                    125:        }
                    126:        return (s);
                    127: bad:
                    128:        if (port)
                    129:                (void) close(*fd2p);
                    130:        (void) close(s);
                    131:        return (-1);
                    132: }

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