1/*- 2 * Copyright (c) 1992 Keith Muller. 3 * Copyright (c) 1992, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * Keith Muller of the University of California, San Diego. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#ifndef lint 35#if 0 36static char sccsid[] = "@(#)tty_subs.c 8.2 (Berkeley) 4/18/94"; 37#endif 38#endif /* not lint */ 39#include <sys/cdefs.h> 40__FBSDID("$FreeBSD$"); 41 42#include <sys/types.h> 43#include <sys/stat.h> 44#include <fcntl.h> 45#include <stdio.h> 46#include <unistd.h> 47#include <string.h> 48#include "pax.h" 49#include "extern.h" 50#include <stdarg.h> 51 52/* 53 * routines that deal with I/O to and from the user 54 */ 55 56#define DEVTTY "/dev/tty" /* device for interactive i/o */ 57static FILE *ttyoutf = NULL; /* output pointing at control tty */ 58static FILE *ttyinf = NULL; /* input pointing at control tty */ 59 60/* 61 * tty_init() 62 * try to open the controlling terminal (if any) for this process. if the 63 * open fails, future ops that require user input will get an EOF 64 */ 65 66int 67tty_init(void) 68{ 69 int ttyfd; 70 71 if ((ttyfd = open(DEVTTY, O_RDWR)) >= 0) { 72 if ((ttyoutf = fdopen(ttyfd, "w")) != NULL) { 73 if ((ttyinf = fdopen(ttyfd, "r")) != NULL) 74 return(0); 75 (void)fclose(ttyoutf); 76 } 77 (void)close(ttyfd); 78 } 79 80 if (iflag) { 81 paxwarn(1, "Fatal error, cannot open %s", DEVTTY); 82 return(-1); 83 } 84 return(0); 85} 86 87/* 88 * tty_prnt() 89 * print a message using the specified format to the controlling tty 90 * if there is no controlling terminal, just return. 91 */ 92 93void 94tty_prnt(const char *fmt, ...) 95{ 96 va_list ap; 97 if (ttyoutf == NULL) 98 return; 99 va_start(ap, fmt); 100 (void)vfprintf(ttyoutf, fmt, ap); 101 va_end(ap); 102 (void)fflush(ttyoutf); 103} 104 105/* 106 * tty_read() 107 * read a string from the controlling terminal if it is open into the 108 * supplied buffer 109 * Return: 110 * 0 if data was read, -1 otherwise. 111 */ 112 113int 114tty_read(char *str, int len) 115{ 116 char *pt; 117 118 if ((--len <= 0) || (ttyinf == NULL) || (fgets(str,len,ttyinf) == NULL)) 119 return(-1); 120 *(str + len) = '\0'; 121 122 /* 123 * strip off that trailing newline 124 */ 125 if ((pt = strchr(str, '\n')) != NULL) 126 *pt = '\0'; 127 return(0); 128} 129 130/* 131 * paxwarn() 132 * write a warning message to stderr. if "set" the exit value of pax 133 * will be non-zero. 134 */ 135 136void 137paxwarn(int set, const char *fmt, ...) 138{ 139 va_list ap; 140 va_start(ap, fmt); 141 if (set) 142 exit_val = 1; 143 /* 144 * when vflag we better ship out an extra \n to get this message on a 145 * line by itself 146 */ 147 if (vflag && vfpart) { 148 (void)fflush(listf); 149 (void)fputc('\n', stderr); 150 vfpart = 0; 151 } 152 (void)fprintf(stderr, "%s: ", argv0); 153 (void)vfprintf(stderr, fmt, ap); 154 va_end(ap); 155 (void)fputc('\n', stderr); 156} 157 158/* 159 * syswarn() 160 * write a warning message to stderr. if "set" the exit value of pax 161 * will be non-zero. 162 */ 163 164void 165syswarn(int set, int errnum, const char *fmt, ...) 166{ 167 va_list ap; 168 va_start(ap, fmt); 169 if (set) 170 exit_val = 1; 171 /* 172 * when vflag we better ship out an extra \n to get this message on a 173 * line by itself 174 */ 175 if (vflag && vfpart) { 176 (void)fflush(listf); 177 (void)fputc('\n', stderr); 178 vfpart = 0; 179 } 180 (void)fprintf(stderr, "%s: ", argv0); 181 (void)vfprintf(stderr, fmt, ap); 182 va_end(ap); 183 184 /* 185 * format and print the errno 186 */ 187 if (errnum > 0) 188 (void)fprintf(stderr, " <%s>", strerror(errnum)); 189 (void)fputc('\n', stderr); 190} 191