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1999-01-17  Ulrich Drepper  <drepper@cygnus.com>

	* stdlib/canonicalize.c (canonicalize): Update write pointer after
	realloc.  Minor optimizations.
This commit is contained in:
Ulrich Drepper 1999-01-17 01:08:32 +00:00
parent 6bfdad38b3
commit 2ac51313f0
2 changed files with 19 additions and 9 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
1999-01-17 Ulrich Drepper <drepper@cygnus.com>
* stdlib/canonicalize.c (canonicalize): Update write pointer after
realloc. Minor optimizations.
1999-01-16 Ulrich Drepper <drepper@cygnus.com>
* po/no.po: Update from norwegian translation team.

23
stdlib/canonicalize.c
View File

@ -1,5 +1,5 @@
/* Return the canonical absolute name of a given file.
Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -92,16 +92,18 @@ canonicalize (const char *name, char *resolved)
int n;
/* Skip sequence of multiple path-separators. */
while (*start == '/') ++start;
while (*start == '/')
++start;
/* Find end of path component. */
for (end = start; *end && *end != '/'; ++end);
for (end = start; *end && *end != '/'; ++end)
/* Nothing. */;
if (end - start == 0)
break;
else if (strncmp (start, ".", end - start) == 0)
else if (end - start == 1 && start[0] == '.')
/* nothing */;
else if (strncmp (start, "..", end - start) == 0)
else if (end - start == 2 && start[0] == '.' && start[1] == '.')
{
/* Back up to previous component, ignore if at root already. */
if (dest > rpath + 1)
@ -116,6 +118,8 @@ canonicalize (const char *name, char *resolved)
if (dest + (end - start) >= rpath_limit)
{
ptrdiff_t dest_offset = dest - rpath;
if (resolved)
{
__set_errno (ENAMETOOLONG);
@ -128,8 +132,10 @@ canonicalize (const char *name, char *resolved)
new_size += path_max;
rpath = realloc (rpath, new_size);
rpath_limit = rpath + new_size;
if (!rpath)
if (rpath == NULL)
return NULL;
dest = rpath + dest_offset;
}
dest = __mempcpy (dest, start, end - start);
@ -166,8 +172,7 @@ canonicalize (const char *name, char *resolved)
/* Careful here, end may be a pointer into extra_buf... */
memmove (&extra_buf[n], end, len + 1);
memcpy (extra_buf, buf, n);
name = end = extra_buf;
name = end = memcpy (extra_buf, buf, n);
if (buf[0] == '/')
dest = rpath + 1; /* It's an absolute symlink */
@ -182,7 +187,7 @@ canonicalize (const char *name, char *resolved)
--dest;
*dest = '\0';
return resolved ? strcpy (resolved, rpath) : rpath;
return resolved ? memcpy (resolved, rpath, dest - rpath + 1) : rpath;
error:
if (resolved)