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authorCem Keylan <cem@ckyln.com>2020-10-16 17:47:01 +0300
committerCem Keylan <cem@ckyln.com>2020-10-16 17:47:01 +0300
commit5d69c6a2661bba0a22f3ecfd517e2e9767a38346 (patch)
tree1f479b2714e127835db7f33a3bfed4c38c52f883 /bin/pax/tty_subs.c
parente2abcdca396661cbe0ae2ddb13d5c2b85682c13a (diff)
downloadotools-5d69c6a2661bba0a22f3ecfd517e2e9767a38346.tar.gz
add tools
Diffstat (limited to 'bin/pax/tty_subs.c')
-rw-r--r--bin/pax/tty_subs.c187
1 files changed, 187 insertions, 0 deletions
diff --git a/bin/pax/tty_subs.c b/bin/pax/tty_subs.c
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--- /dev/null
+++ b/bin/pax/tty_subs.c
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+/* $OpenBSD: tty_subs.c,v 1.17 2016/08/26 04:22:13 guenther 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. 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.
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "pax.h"
+#include "extern.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 | O_CLOEXEC)) >= 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;
+
+ va_start(ap, fmt);
+ if (ttyoutf == NULL) {
+ va_end(ap);
+ 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.
+ */
+
+int
+tty_read(char *str, int len)
+{
+ if (ttyinf == NULL || fgets(str, len, ttyinf) == NULL)
+ return(-1);
+
+ /*
+ * strip off that trailing newline
+ */
+ str[strcspn(str, "\n")] = '\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);
+}