161 lines
3.7 KiB
C
161 lines
3.7 KiB
C
/*-
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* Copyright (c) 2003-2004 Tim Kientzle
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer
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* in this position and unchanged.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "bsdtar_platform.h"
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__FBSDID("$FreeBSD$");
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#include <ctype.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "bsdtar.h"
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static void bsdtar_vwarnc(int code, const char *fmt, va_list ap);
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/*
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* Print a string, taking care with any non-printable characters.
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*/
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void
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safe_fprintf(FILE *f, const char *fmt, ...)
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{
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char *buff;
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int bufflength;
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int length;
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va_list ap;
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char *p;
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bufflength = 512;
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buff = malloc(bufflength);
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va_start(ap, fmt);
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length = vsnprintf(buff, bufflength, fmt, ap);
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if (length >= bufflength) {
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bufflength = length+1;
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buff = realloc(buff, bufflength);
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length = vsnprintf(buff, bufflength, fmt, ap);
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}
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va_end(ap);
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for (p=buff; *p != '\0'; p++) {
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unsigned char c = *p;
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if (isprint(c) && c != '\\')
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putc(c, f);
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else
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switch (c) {
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case '\a': putc('\\', f); putc('a', f); break;
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case '\b': putc('\\', f); putc('b', f); break;
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case '\f': putc('\\', f); putc('f', f); break;
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case '\n': putc('\\', f); putc('n', f); break;
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#if '\r' != '\n'
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/* On some platforms, \n and \r are the same. */
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case '\r': putc('\\', f); putc('r', f); break;
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#endif
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case '\t': putc('\\', f); putc('t', f); break;
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case '\v': putc('\\', f); putc('v', f); break;
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case '\\': putc('\\', f); putc('\\', f); break;
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default:
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fprintf(f, "\\%03o", c);
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}
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}
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free(buff);
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}
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static void
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bsdtar_vwarnc(int code, const char *fmt, va_list ap)
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{
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const char *p;
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p = strrchr(bsdtar_progname(), '/');
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if (p != NULL)
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p++;
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else
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p = bsdtar_progname();
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fprintf(stderr, "%s: ", p);
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vfprintf(stderr, fmt, ap);
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if (code != 0)
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fprintf(stderr, ": %s", strerror(code));
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fprintf(stderr, "\n");
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}
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void
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bsdtar_warnc(int code, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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bsdtar_vwarnc(code, fmt, ap);
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va_end(ap);
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}
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void
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bsdtar_errc(int eval, int code, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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bsdtar_vwarnc(code, fmt, ap);
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va_end(ap);
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exit(eval);
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}
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int
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yes(const char *fmt, ...)
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{
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char buff[32];
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char *p;
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ssize_t l;
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va_list ap;
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va_start(ap, fmt);
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vfprintf(stderr, fmt, ap);
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va_end(ap);
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fprintf(stderr, " (y/N)? ");
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fflush(stderr);
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l = read(2, buff, sizeof(buff));
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buff[l] = 0;
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for (p = buff; *p != '\0'; p++) {
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if (isspace(*p))
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continue;
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switch(*p) {
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case 'y': case 'Y':
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return (1);
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case 'n': case 'N':
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return (0);
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default:
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return (0);
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}
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}
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return (0);
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}
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