135669Sbostic /* 235669Sbostic * Copyright (c) 1988 The Regents of the University of California. 335669Sbostic * All rights reserved. 435669Sbostic * 535669Sbostic * Redistribution and use in source and binary forms are permitted 635669Sbostic * provided that the above copyright notice and this paragraph are 735669Sbostic * duplicated in all such forms and that any documentation, 835669Sbostic * advertising materials, and other materials related to such 935669Sbostic * distribution and use acknowledge that the software was developed 1035669Sbostic * by the University of California, Berkeley. The name of the 1135669Sbostic * University may not be used to endorse or promote products derived 1235669Sbostic * from this software without specific prior written permission. 1335669Sbostic * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 1435669Sbostic * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 1535669Sbostic * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 1635669Sbostic */ 1735669Sbostic 1826559Sdonn #if defined(LIBC_SCCS) && !defined(lint) 19*37901Sbostic static char sccsid[] = "@(#)getpass.c 5.4 (Berkeley) 05/11/89"; 2035669Sbostic #endif /* LIBC_SCCS and not lint */ 2122094Smckusick 2235669Sbostic #include <sys/ioctl.h> 2335669Sbostic #include <sys/signal.h> 242017Swnj #include <stdio.h> 252017Swnj 262017Swnj char * 272017Swnj getpass(prompt) 2835669Sbostic char *prompt; 292017Swnj { 302017Swnj struct sgttyb ttyb; 3135669Sbostic register int ch; 322017Swnj register char *p; 3335669Sbostic FILE *fp, *outfp; 3435669Sbostic long omask; 3535669Sbostic int svflagval; 36*37901Sbostic #define PASSWD_LEN 128 3735669Sbostic static char buf[PASSWD_LEN + 1]; 382017Swnj 3935669Sbostic /* 4035669Sbostic * read and write to /dev/tty if possible; else read from 4135669Sbostic * stdin and write to stderr. 4235669Sbostic */ 4335669Sbostic if ((outfp = fp = fopen("/dev/tty", "w+")) == NULL) { 4435669Sbostic outfp = stderr; 4535669Sbostic fp = stdin; 4635669Sbostic } 4735669Sbostic 4835669Sbostic (void)ioctl(fileno(fp), TIOCGETP, &ttyb); 4935669Sbostic svflagval = ttyb.sg_flags; 502017Swnj ttyb.sg_flags &= ~ECHO; 5135669Sbostic omask = sigblock(sigmask(SIGINT)); 5235669Sbostic (void)ioctl(fileno(fp), TIOCSETP, &ttyb); 5335669Sbostic 54*37901Sbostic (void)fputs(prompt, outfp); 5535669Sbostic rewind(outfp); /* implied flush */ 5635669Sbostic for (p = buf; (ch = getc(fp)) != EOF && ch != '\n';) 5735669Sbostic if (p < buf + PASSWD_LEN) 5835669Sbostic *p++ = ch; 592017Swnj *p = '\0'; 6035669Sbostic (void)write(fileno(outfp), "\n", 1); 6135669Sbostic 6235669Sbostic ttyb.sg_flags = svflagval; 6335669Sbostic (void)ioctl(fileno(fp), TIOCSETP, &ttyb); 6435669Sbostic (void)sigsetmask(omask); 6535669Sbostic if (fp != stdin) 6635669Sbostic (void)fclose(fp); 6735669Sbostic return(buf); 682017Swnj } 69