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1.1 root 1: #include <sgtty.h>
2: #include <stdio.h>
3: #include <ipc.h>
4: #include "defs.h"
5: #include "libc.h"
6:
7: /* this better be larger than either login names or passwords */
8: #define PWDSIZE 16
9:
10: char *_ipcgetpass();
11:
12: /*
13: * log a user into a remote system in the v9 style
14: *
15: * First attempt at a valid userid came from ipcopen(),
16: * who sent it as part of the setup request. Remote
17: * system responds to that with either "OK" or "NO".
18: * If the latter, we must send a string containing
19: * "userid,password<newline>" until either we receive
20: * the OK response or our user here gives up.
21: */
22: ipclogin(fd)
23: {
24: # define BFS 2*PWDSIZE + 3 /* <log>,<pswd>\n\0 */
25: int cc;
26: struct sgttyb echo, noecho;
27: char buf[BFS];
28: char *rbuf;
29: FILE *tty;
30:
31: cc = read(fd, buf, 2) ;
32: if (cc <= 0) {
33: errstr = "ipclogin can't read remote system";
34: return(-1);
35: }
36: if (buf[0] == 'O' && buf[1] == 'K')
37: return fd ;
38: tty = fopen("/dev/tty", "r+");
39: if (tty == NULL) {
40: errstr = "ipclogin can't open /dev/tty";
41: return -1;
42: }
43: if (ioctl(fileno(tty), TIOCGETP, &echo) < 0) {
44: errstr = "ipclogin can't log in";
45: return(-1);
46: }
47: noecho = echo;
48: noecho.sg_flags &= ~ECHO;
49: write (fileno(tty), "please ", 7) ;
50: while (1) {
51: rbuf = _ipcgetpass (tty, "login: ");
52: if (rbuf == 0) {
53: cc = -1;
54: break;
55: }
56: strcpy (buf, rbuf);
57: strcat (buf, ",");
58:
59: ioctl(fileno(tty), TIOCSETP, &noecho) ;
60: rbuf = _ipcgetpass (tty, "Password:");
61: ioctl(fileno(tty), TIOCSETP, &echo) ;
62: write(fileno(tty), "\n", 1);
63: if (rbuf == 0) {
64: cc = -2;
65: break;
66: }
67: strcat (buf, rbuf);
68: strcat (buf, "\n");
69:
70: write(fd, buf, strlen (buf)) ;
71: cc = read(fd, buf, 2) ;
72: if (cc <= 0)
73: break ;
74: if (buf[0] == 'O' && buf[1] == 'K')
75: break ;
76: }
77: fclose(tty);
78: if (cc <= 0) {
79: close(fd);
80: errstr = "ipclogin can't log in";
81: return -1;
82: }
83: return fd;
84: }
85:
86: /*
87: * log a user into a remote system in the Berkeley style
88: *
89: * Send a string to the other side of the form
90: * "<NULL>local_user_name<NULL>remote_user_name<NULL>terminal_type<NULL>"
91: * The response is either
92: * "<NULL>" to indicate success or
93: * "<non_0_byte>string" where `string' is the error message
94: */
95: ipcrogin(fd, opt)
96: int fd;
97: char *opt;
98: {
99: char buf[32];
100: char *me=getlogin();
101: int len;
102:
103: len = me!=NULL ? strlen(me) : 0;
104: write(fd, "", 1);
105: write(fd, me, len+1);
106: write(fd, me, len+1);
107: write(fd, opt, strlen(opt)+1);
108: if(read(fd, buf, 1) != 1)
109: return -1;
110: if(buf[0] != 0){
111: while(read(fd, buf, 1) == 1){
112: write(2, buf, 1);
113: if(buf[0] == '\n')
114: break;
115: }
116: return -1;
117: }
118: return 0;
119: }
120:
121: char *
122: _ipcgetpass(tty, prompt)
123: FILE *tty;
124: char * prompt;
125: {
126: char c;
127: char *cp;
128: static char buf[PWDSIZE + 1];
129:
130: write (fileno(tty), prompt, strlen (prompt));
131:
132: cp = buf;
133: while ((c = getc(tty)) != '\n' && c != EOF && c != '\04') {
134: if (cp < &buf[PWDSIZE])
135: *cp++ = c;
136: }
137: *cp = '\0';
138:
139: if (buf[0] == '\0' && (c == EOF || c== '\04'))
140: return ((char *)0);
141: if (buf[0] == '~' && buf[1] == '.')
142: return ((char *)0);
143:
144: return (buf);
145: }
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