paxmirabilis/src/tty_subs.c

/*      $OpenBSD: tty_subs.c,v 1.12 2003/06/02 23:32:09 millert 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/param.h>
#include <sys/time.h>
#include <sys/stat.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"
#include <stdarg.h>

__SCCSID("@(#)tty_subs.c        8.2 (Berkeley) 4/18/94");
__RCSID("$MirOS: src/bin/pax/tty_subs.c,v 1.2 2007/02/17 04:52:41 tg Exp $");

/*
 * 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;

        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)
{
        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);
}
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1	/* $OpenBSD: tty_subs.c,v 1.12 2003/06/02 23:32:09 millert Exp $ */
2	/* $NetBSD: tty_subs.c,v 1.5 1995/03/21 09:07:52 cgd Exp $ */
3
4	/*-
5	* Copyright (c) 1992 Keith Muller.
6	* Copyright (c) 1992, 1993
7	* The Regents of the University of California. All rights reserved.
8	*
9	* This code is derived from software contributed to Berkeley by
10	* Keith Muller of the University of California, San Diego.
11	*
12	* Redistribution and use in source and binary forms, with or without
13	* modification, are permitted provided that the following conditions
14	* are met:
15	* 1. Redistributions of source code must retain the above copyright
16	* notice, this list of conditions and the following disclaimer.
17	* 2. Redistributions in binary form must reproduce the above copyright
18	* notice, this list of conditions and the following disclaimer in the
19	* documentation and/or other materials provided with the distribution.
20	* 3. Neither the name of the University nor the names of its contributors
21	* may be used to endorse or promote products derived from this software
22	* without specific prior written permission.
23	*
24	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34	* SUCH DAMAGE.
35	*/
36
37	#include <sys/param.h>
38	#include <sys/time.h>
39	#include <sys/stat.h>
40	#include <fcntl.h>
41	#include <stdio.h>
42	#include <errno.h>
43	#include <unistd.h>
44	#include <stdlib.h>
45	#include <string.h>
46	#include "pax.h"
47	#include "extern.h"
48	#include <stdarg.h>
49
50	__SCCSID("@(#)tty_subs.c 8.2 (Berkeley) 4/18/94");
51	__RCSID("$MirOS: src/bin/pax/tty_subs.c,v 1.2 2007/02/17 04:52:41 tg Exp $");
52
53	/*
54	* routines that deal with I/O to and from the user
55	*/
56
57	#define DEVTTY "/dev/tty" /* device for interactive i/o */
58	static FILE ttyoutf = NULL; / output pointing at control tty */
59	static FILE ttyinf = NULL; / input pointing at control tty */
60
61	/*
62	* tty_init()
63	* try to open the controlling terminal (if any) for this process. if the
64	* open fails, future ops that require user input will get an EOF
65	*/
66
67	int
68	tty_init(void)
69	{
70	int ttyfd;
71
72	if ((ttyfd = open(DEVTTY, O_RDWR)) >= 0) {
73	if ((ttyoutf = fdopen(ttyfd, "w")) != NULL) {
74	if ((ttyinf = fdopen(ttyfd, "r")) != NULL)
75	return(0);
76	(void)fclose(ttyoutf);
77	}
78	(void)close(ttyfd);
79	}
80
81	if (iflag) {
82	paxwarn(1, "Fatal error, cannot open %s", DEVTTY);
83	return(-1);
84	}
85	return(0);
86	}
87
88	/*
89	* tty_prnt()
90	* print a message using the specified format to the controlling tty
91	* if there is no controlling terminal, just return.
92	*/
93
94	void
95	tty_prnt(const char *fmt, ...)
96	{
97	va_list ap;
98
99	va_start(ap, fmt);
100	if (ttyoutf == NULL) {
101	va_end(ap);
102	return;
103	}
104	(void)vfprintf(ttyoutf, fmt, ap);
105	va_end(ap);
106	(void)fflush(ttyoutf);
107	}
108
109	/*
110	* tty_read()
111	* read a string from the controlling terminal if it is open into the
112	* supplied buffer
113	* Return:
114	* 0 if data was read, -1 otherwise.
115	*/
116
117	int
118	tty_read(char *str, int len)
119	{
120	char *pt;
121
122	if ((--len <= 0) \|\| (ttyinf == NULL) \|\| (fgets(str,len,ttyinf) == NULL))
123	return(-1);
124	*(str + len) = '\0';
125
126	/*
127	* strip off that trailing newline
128	*/
129	if ((pt = strchr(str, '\n')) != NULL)
130	*pt = '\0';
131	return(0);
132	}
133
134	/*
135	* paxwarn()
136	* write a warning message to stderr. if "set" the exit value of pax
137	* will be non-zero.
138	*/
139
140	void
141	paxwarn(int set, const char *fmt, ...)
142	{
143	va_list ap;
144
145	va_start(ap, fmt);
146	if (set)
147	exit_val = 1;
148	/*
149	* when vflag we better ship out an extra \n to get this message on a
150	* line by itself
151	*/
152	if (vflag && vfpart) {
153	(void)fflush(listf);
154	(void)fputc('\n', stderr);
155	vfpart = 0;
156	}
157	(void)fprintf(stderr, "%s: ", argv0);
158	(void)vfprintf(stderr, fmt, ap);
159	va_end(ap);
160	(void)fputc('\n', stderr);
161	}
162
163	/*
164	* syswarn()
165	* write a warning message to stderr. if "set" the exit value of pax
166	* will be non-zero.
167	*/
168
169	void
170	syswarn(int set, int errnum, const char *fmt, ...)
171	{
172	va_list ap;
173
174	va_start(ap, fmt);
175	if (set)
176	exit_val = 1;
177	/*
178	* when vflag we better ship out an extra \n to get this message on a
179	* line by itself
180	*/
181	if (vflag && vfpart) {
182	(void)fflush(listf);
183	(void)fputc('\n', stderr);
184	vfpart = 0;
185	}
186	(void)fprintf(stderr, "%s: ", argv0);
187	(void)vfprintf(stderr, fmt, ap);
188	va_end(ap);
189
190	/*
191	* format and print the errno
192	*/
193	if (errnum > 0)
194	(void)fprintf(stderr, ": %s", strerror(errnum));
195	(void)fputc('\n', stderr);
196	}