237 lines
5.7 KiB
C
237 lines
5.7 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 <sys/stat.h>
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#include <sys/types.h> /* Linux doesn't define mode_t, etc. in sys/stat.h. */
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#include <archive_entry.h>
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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(struct bsdtar *, int code,
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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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char *buff_heap;
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int buff_length;
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int length;
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va_list ap;
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char *p;
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unsigned i;
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char buff_stack[256];
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char copy_buff[256];
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/* Use a stack-allocated buffer if we can, for speed and safety. */
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buff_heap = NULL;
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buff_length = sizeof(buff_stack);
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buff = buff_stack;
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va_start(ap, fmt);
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length = vsnprintf(buff, buff_length, fmt, ap);
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va_end(ap);
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/* If the result is too large, allocate a buffer on the heap. */
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if (length >= buff_length) {
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buff_length = length+1;
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buff_heap = malloc(buff_length);
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/* Failsafe: use the truncated string if malloc fails. */
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if (buff_heap != NULL) {
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buff = buff_heap;
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va_start(ap, fmt);
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length = vsnprintf(buff, buff_length, fmt, ap);
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va_end(ap);
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}
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}
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/* Write data, expanding unprintable characters. */
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p = buff;
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i = 0;
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while (*p != '\0') {
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unsigned char c = *p++;
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if (isprint(c) && c != '\\')
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copy_buff[i++] = c;
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else {
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copy_buff[i++] = '\\';
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switch (c) {
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case '\a': copy_buff[i++] = 'a'; break;
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case '\b': copy_buff[i++] = 'b'; break;
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case '\f': copy_buff[i++] = 'f'; break;
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case '\n': copy_buff[i++] = 'n'; 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': copy_buff[i++] = 'r'; break;
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#endif
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case '\t': copy_buff[i++] = 't'; break;
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case '\v': copy_buff[i++] = 'v'; break;
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case '\\': copy_buff[i++] = '\\'; break;
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default:
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sprintf(copy_buff + i, "%03o", c);
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i += 3;
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}
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}
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/* If our temp buffer is full, dump it and keep going. */
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if (i > (sizeof(copy_buff) - 8)) {
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copy_buff[i++] = '\0';
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fprintf(f, "%s", copy_buff);
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i = 0;
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}
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}
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copy_buff[i++] = '\0';
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fprintf(f, "%s", copy_buff);
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/* If we allocated a heap-based buffer, free it now. */
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if (buff_heap != NULL)
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free(buff_heap);
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}
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static void
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bsdtar_vwarnc(struct bsdtar *bsdtar, int code, const char *fmt, va_list ap)
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{
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fprintf(stderr, "%s: ", bsdtar->progname);
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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(struct bsdtar *bsdtar, 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(bsdtar, 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(struct bsdtar *bsdtar, 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(bsdtar, 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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void
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bsdtar_strmode(struct archive_entry *entry, char *bp)
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{
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static const char *perms = "?rwxrwxrwx ";
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static const mode_t permbits[] =
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{ S_IRUSR, S_IWUSR, S_IXUSR, S_IRGRP, S_IWGRP, S_IXGRP,
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S_IROTH, S_IWOTH, S_IXOTH };
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mode_t mode;
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int i;
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/* Fill in a default string, then selectively override. */
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strcpy(bp, perms);
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mode = archive_entry_mode(entry);
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switch (mode & S_IFMT) {
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case S_IFREG: bp[0] = '-'; break;
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case S_IFBLK: bp[0] = 'b'; break;
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case S_IFCHR: bp[0] = 'c'; break;
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case S_IFDIR: bp[0] = 'd'; break;
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case S_IFLNK: bp[0] = 'l'; break;
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case S_IFSOCK: bp[0] = 's'; break;
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#ifdef S_IFIFO
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case S_IFIFO: bp[0] = 'p'; break;
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#endif
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#ifdef S_IFWHT
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case S_IFWHT: bp[0] = 'w'; break;
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#endif
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}
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for (i = 0; i < 9; i++)
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if (!(mode & permbits[i]))
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bp[i+1] = '-';
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if (mode & S_ISUID) {
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if (mode & S_IXUSR) bp[3] = 's';
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else bp[3] = 'S';
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}
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if (mode & S_ISGID) {
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if (mode & S_IXGRP) bp[6] = 's';
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else bp[6] = 'S';
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}
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if (mode & S_ISVTX) {
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if (mode & S_IXOTH) bp[9] = 't';
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else bp[9] = 'T';
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}
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if (archive_entry_acl_count(entry, ARCHIVE_ENTRY_ACL_TYPE_ACCESS))
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bp[10] = '+';
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}
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