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Annotation of researchv10no/cmd/descrypt/getpass.c, revision 1.1.1.1

1.1       root        1: #include <stdio.h>
                      2: #include <signal.h>
                      3: #include <sgtty.h>
                      4: 
                      5: char *
                      6: getpass(prompt)
                      7: char *prompt;
                      8: {
                      9:        struct sgttyb ttyb;
                     10:        int flags;
                     11:        register char *p;
                     12:        register c;
                     13:        FILE *fi;
                     14:        static char pbuf[128];
                     15:        int (*signal())();
                     16:        int (*sig)();
                     17: 
                     18:        if ((fi = fdopen(open("/dev/tty", 2), "r")) == NULL)
                     19:                fi = stdin;
                     20:        else
                     21:                setbuf(fi, (char *)NULL);
                     22:        sig = signal(SIGINT, SIG_IGN);
                     23:        gtty(fileno(fi), &ttyb);
                     24:        flags = ttyb.sg_flags;
                     25:        ttyb.sg_flags &= ~ECHO;
                     26:        stty(fileno(fi), &ttyb);
                     27:        fprintf(stderr, "%s", prompt); fflush(stderr);
                     28:        for (p=pbuf; (c = getc(fi))!='\n' && c!=EOF;) {
                     29:                if (p < &pbuf[127])
                     30:                        *p++ = c;
                     31:        }
                     32:        *p = '\0';
                     33:        fprintf(stderr, "\n"); fflush(stderr);
                     34:        ttyb.sg_flags = flags;
                     35:        stty(fileno(fi), &ttyb);
                     36:        signal(SIGINT, sig);
                     37:        if (fi != stdin)
                     38:                fclose(fi);
                     39:        return(pbuf);
                     40: }

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