66c8431841
Windows support.
631 lines
17 KiB
C
631 lines
17 KiB
C
/*-
|
|
* Copyright (c) 2003-2007 Tim Kientzle
|
|
* All rights reserved.
|
|
*
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``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 AUTHOR(S) 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 "bsdtar_platform.h"
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#ifdef HAVE_SYS_STAT_H
|
|
#include <sys/stat.h>
|
|
#endif
|
|
#ifdef HAVE_SYS_TYPES_H
|
|
#include <sys/types.h> /* Linux doesn't define mode_t, etc. in sys/stat.h. */
|
|
#endif
|
|
#include <ctype.h>
|
|
#ifdef HAVE_ERRNO_H
|
|
#include <errno.h>
|
|
#endif
|
|
#ifdef HAVE_STDARG_H
|
|
#include <stdarg.h>
|
|
#endif
|
|
#include <stdio.h>
|
|
#ifdef HAVE_STDLIB_H
|
|
#include <stdlib.h>
|
|
#endif
|
|
#ifdef HAVE_STRING_H
|
|
#include <string.h>
|
|
#endif
|
|
#ifdef HAVE_WCTYPE_H
|
|
#include <wctype.h>
|
|
#else
|
|
/* If we don't have wctype, we need to hack up some version of iswprint(). */
|
|
#define iswprint isprint
|
|
#endif
|
|
|
|
#include "bsdtar.h"
|
|
|
|
static void bsdtar_vwarnc(struct bsdtar *, int code,
|
|
const char *fmt, va_list ap);
|
|
static size_t bsdtar_expand_char(char *, size_t, char);
|
|
static const char *strip_components(const char *path, int elements);
|
|
|
|
/* TODO: Hack up a version of mbtowc for platforms with no wide
|
|
* character support at all. I think the following might suffice,
|
|
* but it needs careful testing.
|
|
* #if !HAVE_MBTOWC
|
|
* #define mbtowc(wcp, p, n) ((*wcp = *p), 1)
|
|
* #endif
|
|
*/
|
|
|
|
/*
|
|
* Print a string, taking care with any non-printable characters.
|
|
*
|
|
* Note that we use a stack-allocated buffer to receive the formatted
|
|
* string if we can. This is partly performance (avoiding a call to
|
|
* malloc()), partly out of expedience (we have to call vsnprintf()
|
|
* before malloc() anyway to find out how big a buffer we need; we may
|
|
* as well point that first call at a small local buffer in case it
|
|
* works), but mostly for safety (so we can use this to print messages
|
|
* about out-of-memory conditions).
|
|
*/
|
|
|
|
void
|
|
safe_fprintf(FILE *f, const char *fmt, ...)
|
|
{
|
|
char fmtbuff_stack[256]; /* Place to format the printf() string. */
|
|
char outbuff[256]; /* Buffer for outgoing characters. */
|
|
char *fmtbuff_heap; /* If fmtbuff_stack is too small, we use malloc */
|
|
char *fmtbuff; /* Pointer to fmtbuff_stack or fmtbuff_heap. */
|
|
int fmtbuff_length;
|
|
int length;
|
|
va_list ap;
|
|
const char *p;
|
|
unsigned i;
|
|
wchar_t wc;
|
|
char try_wc;
|
|
|
|
/* Use a stack-allocated buffer if we can, for speed and safety. */
|
|
fmtbuff_heap = NULL;
|
|
fmtbuff_length = sizeof(fmtbuff_stack);
|
|
fmtbuff = fmtbuff_stack;
|
|
|
|
/* Try formatting into the stack buffer. */
|
|
va_start(ap, fmt);
|
|
length = vsnprintf(fmtbuff, fmtbuff_length, fmt, ap);
|
|
va_end(ap);
|
|
|
|
/* If the result was too large, allocate a buffer on the heap. */
|
|
if (length >= fmtbuff_length) {
|
|
fmtbuff_length = length+1;
|
|
fmtbuff_heap = malloc(fmtbuff_length);
|
|
|
|
/* Reformat the result into the heap buffer if we can. */
|
|
if (fmtbuff_heap != NULL) {
|
|
fmtbuff = fmtbuff_heap;
|
|
va_start(ap, fmt);
|
|
length = vsnprintf(fmtbuff, fmtbuff_length, fmt, ap);
|
|
va_end(ap);
|
|
} else {
|
|
/* Leave fmtbuff pointing to the truncated
|
|
* string in fmtbuff_stack. */
|
|
length = sizeof(fmtbuff_stack) - 1;
|
|
}
|
|
}
|
|
|
|
/* Note: mbrtowc() has a cleaner API, but mbtowc() seems a bit
|
|
* more portable, so we use that here instead. */
|
|
mbtowc(NULL, NULL, 0); /* Reset the shift state. */
|
|
|
|
/* Write data, expanding unprintable characters. */
|
|
p = fmtbuff;
|
|
i = 0;
|
|
try_wc = 1;
|
|
while (*p != '\0') {
|
|
int n;
|
|
|
|
/* Convert to wide char, test if the wide
|
|
* char is printable in the current locale. */
|
|
if (try_wc && (n = mbtowc(&wc, p, length)) != -1) {
|
|
length -= n;
|
|
if (iswprint(wc) && wc != L'\\') {
|
|
/* Printable, copy the bytes through. */
|
|
while (n-- > 0)
|
|
outbuff[i++] = *p++;
|
|
} else {
|
|
/* Not printable, format the bytes. */
|
|
while (n-- > 0)
|
|
i += bsdtar_expand_char(
|
|
outbuff, i, *p++);
|
|
}
|
|
} else {
|
|
/* After any conversion failure, don't bother
|
|
* trying to convert the rest. */
|
|
i += bsdtar_expand_char(outbuff, i, *p++);
|
|
try_wc = 0;
|
|
}
|
|
|
|
/* If our output buffer is full, dump it and keep going. */
|
|
if (i > (sizeof(outbuff) - 20)) {
|
|
outbuff[i++] = '\0';
|
|
fprintf(f, "%s", outbuff);
|
|
i = 0;
|
|
}
|
|
}
|
|
outbuff[i++] = '\0';
|
|
fprintf(f, "%s", outbuff);
|
|
|
|
/* If we allocated a heap-based formatting buffer, free it now. */
|
|
if (fmtbuff_heap != NULL)
|
|
free(fmtbuff_heap);
|
|
}
|
|
|
|
/*
|
|
* Render an arbitrary sequence of bytes into printable ASCII characters.
|
|
*/
|
|
static size_t
|
|
bsdtar_expand_char(char *buff, size_t offset, char c)
|
|
{
|
|
size_t i = offset;
|
|
|
|
if (isprint(c) && c != '\\')
|
|
buff[i++] = c;
|
|
else {
|
|
buff[i++] = '\\';
|
|
switch (c) {
|
|
case '\a': buff[i++] = 'a'; break;
|
|
case '\b': buff[i++] = 'b'; break;
|
|
case '\f': buff[i++] = 'f'; break;
|
|
case '\n': buff[i++] = 'n'; break;
|
|
#if '\r' != '\n'
|
|
/* On some platforms, \n and \r are the same. */
|
|
case '\r': buff[i++] = 'r'; break;
|
|
#endif
|
|
case '\t': buff[i++] = 't'; break;
|
|
case '\v': buff[i++] = 'v'; break;
|
|
case '\\': buff[i++] = '\\'; break;
|
|
default:
|
|
sprintf(buff + i, "%03o", 0xFF & (int)c);
|
|
i += 3;
|
|
}
|
|
}
|
|
|
|
return (i - offset);
|
|
}
|
|
|
|
static void
|
|
bsdtar_vwarnc(struct bsdtar *bsdtar, int code, const char *fmt, va_list ap)
|
|
{
|
|
fprintf(stderr, "%s: ", bsdtar->progname);
|
|
vfprintf(stderr, fmt, ap);
|
|
if (code != 0)
|
|
fprintf(stderr, ": %s", strerror(code));
|
|
fprintf(stderr, "\n");
|
|
}
|
|
|
|
void
|
|
bsdtar_warnc(struct bsdtar *bsdtar, int code, const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
bsdtar_vwarnc(bsdtar, code, fmt, ap);
|
|
va_end(ap);
|
|
}
|
|
|
|
void
|
|
bsdtar_errc(struct bsdtar *bsdtar, int eval, int code, const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
bsdtar_vwarnc(bsdtar, code, fmt, ap);
|
|
va_end(ap);
|
|
exit(eval);
|
|
}
|
|
|
|
int
|
|
yes(const char *fmt, ...)
|
|
{
|
|
char buff[32];
|
|
char *p;
|
|
ssize_t l;
|
|
|
|
va_list ap;
|
|
va_start(ap, fmt);
|
|
vfprintf(stderr, fmt, ap);
|
|
va_end(ap);
|
|
fprintf(stderr, " (y/N)? ");
|
|
fflush(stderr);
|
|
|
|
l = read(2, buff, sizeof(buff) - 1);
|
|
if (l <= 0)
|
|
return (0);
|
|
buff[l] = 0;
|
|
|
|
for (p = buff; *p != '\0'; p++) {
|
|
if (isspace(0xff & (int)*p))
|
|
continue;
|
|
switch(*p) {
|
|
case 'y': case 'Y':
|
|
return (1);
|
|
case 'n': case 'N':
|
|
return (0);
|
|
default:
|
|
return (0);
|
|
}
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Read lines from file and do something with each one. If option_null
|
|
* is set, lines are terminated with zero bytes; otherwise, they're
|
|
* terminated with newlines.
|
|
*
|
|
* This uses a self-sizing buffer to handle arbitrarily-long lines.
|
|
* If the "process" function returns non-zero for any line, this
|
|
* function will return non-zero after attempting to process all
|
|
* remaining lines.
|
|
*/
|
|
int
|
|
process_lines(struct bsdtar *bsdtar, const char *pathname,
|
|
int (*process)(struct bsdtar *, const char *))
|
|
{
|
|
FILE *f;
|
|
char *buff, *buff_end, *line_start, *line_end, *p;
|
|
size_t buff_length, new_buff_length, bytes_read, bytes_wanted;
|
|
int separator;
|
|
int ret;
|
|
|
|
separator = bsdtar->option_null ? '\0' : '\n';
|
|
ret = 0;
|
|
|
|
if (strcmp(pathname, "-") == 0)
|
|
f = stdin;
|
|
else
|
|
f = fopen(pathname, "r");
|
|
if (f == NULL)
|
|
bsdtar_errc(bsdtar, 1, errno, "Couldn't open %s", pathname);
|
|
buff_length = 8192;
|
|
buff = malloc(buff_length);
|
|
if (buff == NULL)
|
|
bsdtar_errc(bsdtar, 1, ENOMEM, "Can't read %s", pathname);
|
|
line_start = line_end = buff_end = buff;
|
|
for (;;) {
|
|
/* Get some more data into the buffer. */
|
|
bytes_wanted = buff + buff_length - buff_end;
|
|
bytes_read = fread(buff_end, 1, bytes_wanted, f);
|
|
buff_end += bytes_read;
|
|
/* Process all complete lines in the buffer. */
|
|
while (line_end < buff_end) {
|
|
if (*line_end == separator) {
|
|
*line_end = '\0';
|
|
if ((*process)(bsdtar, line_start) != 0)
|
|
ret = -1;
|
|
line_start = line_end + 1;
|
|
line_end = line_start;
|
|
} else
|
|
line_end++;
|
|
}
|
|
if (feof(f))
|
|
break;
|
|
if (ferror(f))
|
|
bsdtar_errc(bsdtar, 1, errno,
|
|
"Can't read %s", pathname);
|
|
if (line_start > buff) {
|
|
/* Move a leftover fractional line to the beginning. */
|
|
memmove(buff, line_start, buff_end - line_start);
|
|
buff_end -= line_start - buff;
|
|
line_end -= line_start - buff;
|
|
line_start = buff;
|
|
} else {
|
|
/* Line is too big; enlarge the buffer. */
|
|
new_buff_length = buff_length * 2;
|
|
if (new_buff_length <= buff_length)
|
|
bsdtar_errc(bsdtar, 1, ENOMEM,
|
|
"Line too long in %s", pathname);
|
|
buff_length = new_buff_length;
|
|
p = realloc(buff, buff_length);
|
|
if (p == NULL)
|
|
bsdtar_errc(bsdtar, 1, ENOMEM,
|
|
"Line too long in %s", pathname);
|
|
buff_end = p + (buff_end - buff);
|
|
line_end = p + (line_end - buff);
|
|
line_start = buff = p;
|
|
}
|
|
}
|
|
/* At end-of-file, handle the final line. */
|
|
if (line_end > line_start) {
|
|
*line_end = '\0';
|
|
if ((*process)(bsdtar, line_start) != 0)
|
|
ret = -1;
|
|
}
|
|
free(buff);
|
|
if (f != stdin)
|
|
fclose(f);
|
|
return (ret);
|
|
}
|
|
|
|
/*-
|
|
* The logic here for -C <dir> attempts to avoid
|
|
* chdir() as long as possible. For example:
|
|
* "-C /foo -C /bar file" needs chdir("/bar") but not chdir("/foo")
|
|
* "-C /foo -C bar file" needs chdir("/foo/bar")
|
|
* "-C /foo -C bar /file1" does not need chdir()
|
|
* "-C /foo -C bar /file1 file2" needs chdir("/foo/bar") before file2
|
|
*
|
|
* The only correct way to handle this is to record a "pending" chdir
|
|
* request and combine multiple requests intelligently until we
|
|
* need to process a non-absolute file. set_chdir() adds the new dir
|
|
* to the pending list; do_chdir() actually executes any pending chdir.
|
|
*
|
|
* This way, programs that build tar command lines don't have to worry
|
|
* about -C with non-existent directories; such requests will only
|
|
* fail if the directory must be accessed.
|
|
*/
|
|
void
|
|
set_chdir(struct bsdtar *bsdtar, const char *newdir)
|
|
{
|
|
if (newdir[0] == '/') {
|
|
/* The -C /foo -C /bar case; dump first one. */
|
|
free(bsdtar->pending_chdir);
|
|
bsdtar->pending_chdir = NULL;
|
|
}
|
|
if (bsdtar->pending_chdir == NULL)
|
|
/* Easy case: no previously-saved dir. */
|
|
bsdtar->pending_chdir = strdup(newdir);
|
|
else {
|
|
/* The -C /foo -C bar case; concatenate */
|
|
char *old_pending = bsdtar->pending_chdir;
|
|
size_t old_len = strlen(old_pending);
|
|
bsdtar->pending_chdir = malloc(old_len + strlen(newdir) + 2);
|
|
if (old_pending[old_len - 1] == '/')
|
|
old_pending[old_len - 1] = '\0';
|
|
if (bsdtar->pending_chdir != NULL)
|
|
sprintf(bsdtar->pending_chdir, "%s/%s",
|
|
old_pending, newdir);
|
|
free(old_pending);
|
|
}
|
|
if (bsdtar->pending_chdir == NULL)
|
|
bsdtar_errc(bsdtar, 1, errno, "No memory");
|
|
}
|
|
|
|
void
|
|
do_chdir(struct bsdtar *bsdtar)
|
|
{
|
|
if (bsdtar->pending_chdir == NULL)
|
|
return;
|
|
|
|
if (chdir(bsdtar->pending_chdir) != 0) {
|
|
bsdtar_errc(bsdtar, 1, 0, "could not chdir to '%s'\n",
|
|
bsdtar->pending_chdir);
|
|
}
|
|
free(bsdtar->pending_chdir);
|
|
bsdtar->pending_chdir = NULL;
|
|
}
|
|
|
|
const char *
|
|
strip_components(const char *path, int elements)
|
|
{
|
|
const char *p = path;
|
|
|
|
while (elements > 0) {
|
|
switch (*p++) {
|
|
case '/':
|
|
elements--;
|
|
path = p;
|
|
break;
|
|
case '\0':
|
|
/* Path is too short, skip it. */
|
|
return (NULL);
|
|
}
|
|
}
|
|
|
|
while (*path == '/')
|
|
++path;
|
|
if (*path == '\0')
|
|
return (NULL);
|
|
|
|
return (path);
|
|
}
|
|
|
|
/*
|
|
* Handle --strip-components and any future path-rewriting options.
|
|
* Returns non-zero if the pathname should not be extracted.
|
|
*
|
|
* TODO: Support pax-style regex path rewrites.
|
|
*/
|
|
int
|
|
edit_pathname(struct bsdtar *bsdtar, struct archive_entry *entry)
|
|
{
|
|
const char *name = archive_entry_pathname(entry);
|
|
#if HAVE_REGEX_H
|
|
char *subst_name;
|
|
int r;
|
|
#endif
|
|
|
|
#if HAVE_REGEX_H
|
|
r = apply_substitution(bsdtar, name, &subst_name, 0);
|
|
if (r == -1) {
|
|
bsdtar_warnc(bsdtar, 0, "Invalid substitution, skipping entry");
|
|
return 1;
|
|
}
|
|
if (r == 1) {
|
|
archive_entry_copy_pathname(entry, subst_name);
|
|
if (*subst_name == '\0') {
|
|
free(subst_name);
|
|
return -1;
|
|
} else
|
|
free(subst_name);
|
|
name = archive_entry_pathname(entry);
|
|
}
|
|
|
|
if (archive_entry_hardlink(entry)) {
|
|
r = apply_substitution(bsdtar, archive_entry_hardlink(entry), &subst_name, 1);
|
|
if (r == -1) {
|
|
bsdtar_warnc(bsdtar, 0, "Invalid substitution, skipping entry");
|
|
return 1;
|
|
}
|
|
if (r == 1) {
|
|
archive_entry_copy_hardlink(entry, subst_name);
|
|
free(subst_name);
|
|
}
|
|
}
|
|
if (archive_entry_symlink(entry) != NULL) {
|
|
r = apply_substitution(bsdtar, archive_entry_symlink(entry), &subst_name, 1);
|
|
if (r == -1) {
|
|
bsdtar_warnc(bsdtar, 0, "Invalid substitution, skipping entry");
|
|
return 1;
|
|
}
|
|
if (r == 1) {
|
|
archive_entry_copy_symlink(entry, subst_name);
|
|
free(subst_name);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* Strip leading dir names as per --strip-components option. */
|
|
if (bsdtar->strip_components > 0) {
|
|
const char *linkname = archive_entry_hardlink(entry);
|
|
|
|
name = strip_components(name, bsdtar->strip_components);
|
|
if (name == NULL)
|
|
return (1);
|
|
|
|
if (linkname != NULL) {
|
|
linkname = strip_components(linkname,
|
|
bsdtar->strip_components);
|
|
if (linkname == NULL)
|
|
return (1);
|
|
archive_entry_copy_hardlink(entry, linkname);
|
|
}
|
|
}
|
|
|
|
/* By default, don't write or restore absolute pathnames. */
|
|
if (!bsdtar->option_absolute_paths) {
|
|
const char *rp, *p = name;
|
|
int slashonly = 1;
|
|
|
|
/* Remove leading "//./" or "//?/" or "//?/UNC/"
|
|
* (absolute path prefixes used by Windows API) */
|
|
if ((p[0] == '/' || p[0] == '\\') &&
|
|
(p[1] == '/' || p[1] == '\\') &&
|
|
(p[2] == '.' || p[2] == '?') &&
|
|
(p[3] == '/' || p[3] == '\\'))
|
|
{
|
|
if (p[2] == '?' &&
|
|
(p[4] == 'U' || p[4] == 'u') &&
|
|
(p[5] == 'N' || p[5] == 'n') &&
|
|
(p[6] == 'C' || p[6] == 'c') &&
|
|
(p[7] == '/' || p[7] == '\\'))
|
|
p += 8;
|
|
else
|
|
p += 4;
|
|
slashonly = 0;
|
|
}
|
|
do {
|
|
rp = p;
|
|
/* Remove leading drive letter from archives created
|
|
* on Windows. */
|
|
if (((p[0] >= 'a' && p[0] <= 'z') ||
|
|
(p[0] >= 'A' && p[0] <= 'Z')) &&
|
|
p[1] == ':') {
|
|
p += 2;
|
|
slashonly = 0;
|
|
}
|
|
/* Remove leading "/../", "//", etc. */
|
|
while (p[0] == '/' || p[0] == '\\') {
|
|
if (p[1] == '.' && p[2] == '.' &&
|
|
(p[3] == '/' || p[3] == '\\')) {
|
|
p += 3; /* Remove "/..", leave "/"
|
|
* for next pass. */
|
|
slashonly = 0;
|
|
} else
|
|
p += 1; /* Remove "/". */
|
|
}
|
|
} while (rp != p);
|
|
|
|
if (p != name && !bsdtar->warned_lead_slash) {
|
|
/* Generate a warning the first time this happens. */
|
|
if (slashonly)
|
|
bsdtar_warnc(bsdtar, 0,
|
|
"Removing leading '%c' from member names",
|
|
name[0]);
|
|
else
|
|
bsdtar_warnc(bsdtar, 0,
|
|
"Removing leading drive letter from "
|
|
"member names");
|
|
bsdtar->warned_lead_slash = 1;
|
|
}
|
|
|
|
/* Special case: Stripping everything yields ".". */
|
|
if (*p == '\0')
|
|
name = ".";
|
|
else
|
|
name = p;
|
|
} else {
|
|
/* Strip redundant leading '/' characters. */
|
|
while (name[0] == '/' && name[1] == '/')
|
|
name++;
|
|
}
|
|
|
|
/* Safely replace name in archive_entry. */
|
|
if (name != archive_entry_pathname(entry)) {
|
|
char *q = strdup(name);
|
|
archive_entry_copy_pathname(entry, q);
|
|
free(q);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Like strcmp(), but try to be a little more aware of the fact that
|
|
* we're comparing two paths. Right now, it just handles leading
|
|
* "./" and trailing '/' specially, so that "a/b/" == "./a/b"
|
|
*
|
|
* TODO: Make this better, so that "./a//b/./c/" == "a/b/c"
|
|
* TODO: After this works, push it down into libarchive.
|
|
* TODO: Publish the path normalization routines in libarchive so
|
|
* that bsdtar can normalize paths and use fast strcmp() instead
|
|
* of this.
|
|
*/
|
|
|
|
int
|
|
pathcmp(const char *a, const char *b)
|
|
{
|
|
/* Skip leading './' */
|
|
if (a[0] == '.' && a[1] == '/' && a[2] != '\0')
|
|
a += 2;
|
|
if (b[0] == '.' && b[1] == '/' && b[2] != '\0')
|
|
b += 2;
|
|
/* Find the first difference, or return (0) if none. */
|
|
while (*a == *b) {
|
|
if (*a == '\0')
|
|
return (0);
|
|
a++;
|
|
b++;
|
|
}
|
|
/*
|
|
* If one ends in '/' and the other one doesn't,
|
|
* they're the same.
|
|
*/
|
|
if (a[0] == '/' && a[1] == '\0' && b[0] == '\0')
|
|
return (0);
|
|
if (a[0] == '\0' && b[0] == '/' && b[1] == '\0')
|
|
return (0);
|
|
/* They're really different, return the correct sign. */
|
|
return (*(const unsigned char *)a - *(const unsigned char *)b);
|
|
}
|