135669Sbostic /* 235669Sbostic * Copyright (c) 1988 The Regents of the University of California. 335669Sbostic * All rights reserved. 435669Sbostic * 542624Sbostic * %sccs.include.redist.c% 635669Sbostic */ 735669Sbostic 826559Sdonn #if defined(LIBC_SCCS) && !defined(lint) 9*60202Sbostic static char sccsid[] = "@(#)getpass.c 5.10 (Berkeley) 05/21/93"; 1035669Sbostic #endif /* LIBC_SCCS and not lint */ 1122094Smckusick 1240101Smarc #include <sys/termios.h> 1335669Sbostic #include <sys/signal.h> 14*60202Sbostic 15*60202Sbostic #include <paths.h> 16*60202Sbostic #include <pwd.h> 172017Swnj #include <stdio.h> 1846597Sdonn #include <unistd.h> 192017Swnj 202017Swnj char * 212017Swnj getpass(prompt) 2246597Sdonn const char *prompt; 232017Swnj { 2440101Smarc struct termios term; 2535669Sbostic register int ch; 262017Swnj register char *p; 2735669Sbostic FILE *fp, *outfp; 2835669Sbostic long omask; 2940101Smarc int echo; 3040101Smarc static char buf[_PASSWORD_LEN + 1]; 312017Swnj 3235669Sbostic /* 3335669Sbostic * read and write to /dev/tty if possible; else read from 3435669Sbostic * stdin and write to stderr. 3535669Sbostic */ 36*60202Sbostic if ((outfp = fp = fopen(_PATH_TTY, "w+")) == NULL) { 3735669Sbostic outfp = stderr; 3835669Sbostic fp = stdin; 3935669Sbostic } 4040101Smarc /* 4140101Smarc * note - blocking signals isn't necessarily the 4240101Smarc * right thing, but we leave it for now. 4340101Smarc */ 4440101Smarc omask = sigblock(sigmask(SIGINT)|sigmask(SIGTSTP)); 4540101Smarc (void)tcgetattr(fileno(fp), &term); 4640101Smarc if (echo = (term.c_lflag & ECHO)) { 4740101Smarc term.c_lflag &= ~ECHO; 4849225Sbostic (void)tcsetattr(fileno(fp), TCSAFLUSH|TCSASOFT, &term); 4940101Smarc } 5037901Sbostic (void)fputs(prompt, outfp); 5135669Sbostic rewind(outfp); /* implied flush */ 5235669Sbostic for (p = buf; (ch = getc(fp)) != EOF && ch != '\n';) 5340101Smarc if (p < buf + _PASSWORD_LEN) 5435669Sbostic *p++ = ch; 552017Swnj *p = '\0'; 5635669Sbostic (void)write(fileno(outfp), "\n", 1); 5740101Smarc if (echo) { 5840101Smarc term.c_lflag |= ECHO; 59*60202Sbostic (void)tcsetattr(fileno(fp), TCSAFLUSH|TCSASOFT, &term); 6040101Smarc } 6135669Sbostic (void)sigsetmask(omask); 6235669Sbostic if (fp != stdin) 6335669Sbostic (void)fclose(fp); 6435669Sbostic return(buf); 652017Swnj } 66