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Diffstat (limited to 'bin/pax/tty_subs.c')
| -rw-r--r-- | bin/pax/tty_subs.c | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/bin/pax/tty_subs.c b/bin/pax/tty_subs.c new file mode 100644 index 000000000000..ea524c451007 --- /dev/null +++ b/bin/pax/tty_subs.c @@ -0,0 +1,192 @@ +/*- + * SPDX-License-Identifier: BSD-3-Clause + * + * 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. 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"; +#endif +#endif /* not lint */ +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <stdio.h> +#include <unistd.h> +#include <string.h> +#include "pax.h" +#include "extern.h" +#include <stdarg.h> + +/* + * 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 terminal (if any) for this process. if the + * open fails, future ops that require user input will get an EOF + */ + +int +tty_init(void) +{ + 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. + */ + +void +tty_prnt(const char *fmt, ...) +{ + va_list ap; + if (ttyoutf == NULL) + return; + va_start(ap, fmt); + (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. + */ + +int +tty_read(char *str, int len) +{ + 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. + */ + +void +paxwarn(int set, const char *fmt, ...) +{ + va_list ap; + va_start(ap, fmt); + 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)fflush(listf); + (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. + */ + +void +syswarn(int set, int errnum, const char *fmt, ...) +{ + va_list ap; + va_start(ap, fmt); + 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)fflush(listf); + (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); +} |