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Annotation of researchv10dc/ipc/libipc/ipclogin.c, revision 1.1

1.1     ! root        1: #include <ipc.h>
        !             2: #include <sys/ttyio.h>
        !             3: #include "defs.h"
        !             4: #include "libc.h"
        !             5: 
        !             6: /* this better be larger than either login names or passwords */
        !             7: #define PWDSIZE 16
        !             8: 
        !             9: char *_ipcgetpass();
        !            10: 
        !            11: /*
        !            12:  * log a user into a remote system in the v9 style
        !            13:  *
        !            14:  * First attempt at a valid userid came from ipcopen(),
        !            15:  * who sent it as part of the setup request.  Remote
        !            16:  * system responds to that with either "OK" or "NO".
        !            17:  * If the latter, we must send a string containing
        !            18:  * "userid,password<newline>" until either we receive
        !            19:  * the OK response or our user here gives up.
        !            20:  */
        !            21: ipclogin(fd)
        !            22: {
        !            23: #      define BFS 2*PWDSIZE + 3        /* <log>,<pswd>\n\0 */
        !            24:        int     cc;
        !            25:        struct sgttyb echo, noecho;
        !            26:        char    buf[BFS];
        !            27:        char    *rbuf;
        !            28:        int     tty;
        !            29: 
        !            30:        cc = read(fd, buf, 2) ;
        !            31:        if (cc <= 0) {
        !            32:                errstr = "ipclogin can't read remote system";
        !            33:                return(-1);
        !            34:        }
        !            35:        if (buf[0] == 'O' && buf[1] == 'K')
        !            36:                return fd ;
        !            37:        tty = open("/dev/tty", 2);
        !            38:        if (tty < 0){
        !            39:                errstr = "ipclogin can't open /dev/tty";
        !            40:                return -1;
        !            41:        }
        !            42:        if (ioctl(tty, TIOCGETP, &echo) < 0) {
        !            43:                errstr = "ipclogin can't log in";
        !            44:                return(-1);
        !            45:        }
        !            46:        noecho = echo;
        !            47:        noecho.sg_flags &= ~ECHO;
        !            48:        write (tty, "please ", 7) ;
        !            49:        while (1) {
        !            50:                rbuf = _ipcgetpass (tty, "login: ");
        !            51:                if (rbuf == 0) {
        !            52:                        cc = -1;
        !            53:                        break;
        !            54:                }
        !            55:                strcpy (buf, rbuf);
        !            56:                strcat (buf, ",");
        !            57: 
        !            58:                ioctl(tty, TIOCSETP, &noecho) ;
        !            59:                rbuf = _ipcgetpass (tty, "Password:");
        !            60:                ioctl(tty, TIOCSETP, &echo) ;
        !            61:                write(tty, "\n", 1);
        !            62:                if (rbuf == 0) {
        !            63:                        cc = -2;
        !            64:                        break;
        !            65:                }
        !            66:                strcat (buf, rbuf);
        !            67: 
        !            68:                write(fd, buf, strlen(buf)+1) ;
        !            69:                cc = read(fd, buf, 2) ;
        !            70:                if (cc <= 0)
        !            71:                        break ;
        !            72:                if (buf[0] == 'O' && buf[1] == 'K')
        !            73:                        break ;
        !            74:        }
        !            75:        close(tty);
        !            76:        if (cc <= 0) {
        !            77:                close(fd);
        !            78:                errstr = "ipclogin can't log in";
        !            79:                return -1;
        !            80:        }
        !            81:        return fd;
        !            82: }
        !            83: 
        !            84: /*
        !            85:  * log a user into a remote system in the Berkeley style
        !            86:  *
        !            87:  * Send a string to the other side of the form
        !            88:  *     "terminal_type<NULL>"
        !            89:  * The response is either
        !            90:  *     "<NULL>"                to indicate success or
        !            91:  *     "<non_0_byte>string"    where `string' is the error message
        !            92:  */
        !            93: ipcrogin(fd, opt)
        !            94:        int fd;
        !            95:        char *opt;
        !            96: {
        !            97:        char buf[32];
        !            98: 
        !            99:        write(fd, opt, strlen(opt)+1);
        !           100:        if(read(fd, buf, 1) != 1)
        !           101:                return -1;
        !           102:        if(buf[0] != 0){
        !           103:                while(read(fd, buf, 1) == 1){
        !           104:                        write(2, buf, 1);
        !           105:                        if(buf[0] == '\n')
        !           106:                                break;
        !           107:                }
        !           108:                return -1;
        !           109:        }
        !           110:        return 0;
        !           111: }
        !           112: 
        !           113: char *
        !           114: _ipcgetpass(tty, prompt)
        !           115: int tty;
        !           116: char * prompt;
        !           117: {
        !           118:        char c;
        !           119:        char *cp;
        !           120:        int n;
        !           121:        static char buf[PWDSIZE + 1];
        !           122: 
        !           123:        write (tty, prompt, strlen (prompt));
        !           124: 
        !           125:        cp = buf;
        !           126:        while((n=read(tty, &c, 1))==1 && c != '\n' && c != '\04') {
        !           127:                if (cp < &buf[PWDSIZE])
        !           128:                        *cp++ = c;
        !           129:        }
        !           130:        *cp = '\0';
        !           131: 
        !           132:        if (buf[0] == '\0' && (n != 1 || c== '\04'))
        !           133:                return ((char *)0);
        !           134:        if (buf[0] == '~' && buf[1] == '.')
        !           135:                return ((char *)0);
        !           136: 
        !           137:        return (buf);
        !           138: }

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