/* $OpenBSD: tty_subs.c,v 1.5 1997/07/25 18:58:39 mickey Exp $ */ /* $NetBSD: tty_subs.c,v 1.5 1995/03/21 09:07:52 cgd Exp $ */ /*- * Copyright (c) 1992 Keith Muller. * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Keith Muller of the University of California, San Diego. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint #if 0 static char sccsid[] = "@(#)tty_subs.c 8.2 (Berkeley) 4/18/94"; #else static char rcsid[] __attribute__((__unused__)) = "$OpenBSD: tty_subs.c,v 1.5 1997/07/25 18:58:39 mickey Exp $"; #endif #endif /* not lint */ #include <sys/types.h> #include <sys/time.h> #include <sys/stat.h> #include <sys/param.h> #include <fcntl.h> #include <stdio.h> #include <errno.h> #include <unistd.h> #include <stdlib.h> #include <string.h> #include "pax.h" #include "extern.h" #ifdef __STDC__ #include <stdarg.h> #else #include <varargs.h> #endif /* * routines that deal with I/O to and from the user */ #define DEVTTY "/dev/tty" /* device for interactive i/o */ static FILE *ttyoutf = NULL; /* output pointing at control tty */ static FILE *ttyinf = NULL; /* input pointing at control tty */ /* * tty_init() * try to open the controlling termina (if any) for this process. if the * open fails, future ops that require user input will get an EOF */ #ifdef __STDC__ int tty_init(void) #else int tty_init() #endif { int ttyfd; if ((ttyfd = open(DEVTTY, O_RDWR)) >= 0) { if ((ttyoutf = fdopen(ttyfd, "w")) != NULL) { if ((ttyinf = fdopen(ttyfd, "r")) != NULL) return(0); (void)fclose(ttyoutf); } (void)close(ttyfd); } if (iflag) { paxwarn(1, "Fatal error, cannot open %s", DEVTTY); return(-1); } return(0); } /* * tty_prnt() * print a message using the specified format to the controlling tty * if there is no controlling terminal, just return. */ #ifdef __STDC__ void tty_prnt(char *fmt, ...) #else void tty_prnt(fmt, va_alist) char *fmt; va_dcl #endif { va_list ap; # ifdef __STDC__ va_start(ap, fmt); # else va_start(ap); # endif if (ttyoutf == NULL) return; (void)vfprintf(ttyoutf, fmt, ap); va_end(ap); (void)fflush(ttyoutf); } /* * tty_read() * read a string from the controlling terminal if it is open into the * supplied buffer * Return: * 0 if data was read, -1 otherwise. */ #ifdef __STDC__ int tty_read(char *str, int len) #else int tty_read(str, len) char *str; int len; #endif { register char *pt; if ((--len <= 0) || (ttyinf == NULL) || (fgets(str,len,ttyinf) == NULL)) return(-1); *(str + len) = '\0'; /* * strip off that trailing newline */ if ((pt = strchr(str, '\n')) != NULL) *pt = '\0'; return(0); } /* * paxwarn() * write a warning message to stderr. if "set" the exit value of pax * will be non-zero. */ #ifdef __STDC__ void paxwarn(int set, char *fmt, ...) #else void paxwarn(set, fmt, va_alist) int set; char *fmt; va_dcl #endif { va_list ap; # ifdef __STDC__ va_start(ap, fmt); # else va_start(ap); # endif if (set) exit_val = 1; /* * when vflag we better ship out an extra \n to get this message on a * line by itself */ if (vflag && vfpart) { (void)fputc('\n', stderr); vfpart = 0; } (void)fprintf(stderr, "%s: ", argv0); (void)vfprintf(stderr, fmt, ap); va_end(ap); (void)fputc('\n', stderr); } /* * syswarn() * write a warning message to stderr. if "set" the exit value of pax * will be non-zero. */ #ifdef __STDC__ void syswarn(int set, int errnum, char *fmt, ...) #else void syswarn(set, errnum, fmt, va_alist) int set; int errnum; char *fmt; va_dcl #endif { va_list ap; # ifdef __STDC__ va_start(ap, fmt); # else va_start(ap); # endif if (set) exit_val = 1; /* * when vflag we better ship out an extra \n to get this message on a * line by itself */ if (vflag && vfpart) { (void)fputc('\n', stderr); vfpart = 0; } (void)fprintf(stderr, "%s: ", argv0); (void)vfprintf(stderr, fmt, ap); va_end(ap); /* * format and print the errno */ if (errnum > 0) (void)fprintf(stderr, " <%s>", strerror(errnum)); (void)fputc('\n', stderr); }