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Annotation of researchv9/libc/stdio/getpass.c, revision 1.1.1.1

1.1       root        1: /* @(#)getpass.c       4.2 (Berkeley) 7/1/81 */
                      2: #include <stdio.h>
                      3: #include <signal.h>
                      4: #include <sys/ttyio.h>
                      5: 
                      6: char *
                      7: getpass(prompt)
                      8: char *prompt;
                      9: {
                     10:        struct sgttyb ttyb;
                     11:        int flags;
                     12:        register char *p;
                     13:        register c;
                     14:        FILE *fi;
                     15:        static char pbuf[9];
                     16:        int (*signal())();
                     17:        int (*sig)();
                     18: 
                     19:        if ((fi = fopen("/dev/tty", "r")) == NULL)
                     20:                fi = stdin;
                     21:        else
                     22:                setbuf(fi, (char *)NULL);
                     23:        sig = signal(SIGINT, SIG_IGN);
                     24:        ioctl(fileno(fi), TIOCGETP, &ttyb);
                     25:        flags = ttyb.sg_flags;
                     26:        ttyb.sg_flags &= ~ECHO;
                     27:        ioctl(fileno(fi), TIOCSETP, &ttyb);
                     28:        fprintf(stderr, "%s", prompt); fflush(stderr);
                     29:        for (p=pbuf; (c = getc(fi))!='\n' && c!=EOF;) {
                     30:                if (p < &pbuf[8])
                     31:                        *p++ = c;
                     32:        }
                     33:        *p = '\0';
                     34:        fprintf(stderr, "\n"); fflush(stderr);
                     35:        ttyb.sg_flags = flags;
                     36:        ioctl(fileno(fi), TIOCSETP, &ttyb);
                     37:        signal(SIGINT, sig);
                     38:        if (fi != stdin)
                     39:                fclose(fi);
                     40:        return(pbuf);
                     41: }

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