embedaddon/libiconv/srclib/readlink.c - diff

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Diff for /embedaddon/libiconv/srclib/readlink.c between versions 1.1 and 1.1.1.3

version 1.1, 2012/02/21 22:57:48	version 1.1.1.3, 2021/03/17 13:38:46
Line 1	Line 1
/* Stub for readlink().	/* Stub for readlink().
Copyright (C) 2003-2007 Free Software Foundation, Inc.	Copyright (C) 2003-2007, 2009-2019 Free Software Foundation, Inc.

This program is free software: you can redistribute it and/or modify	This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by	it under the terms of the GNU General Public License as published by
Line 12	Line 12
GNU General Public License for more details.	GNU General Public License for more details.

You should have received a copy of the GNU General Public License	You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */	along with this program. If not, see <https://www.gnu.org/licenses/>. */

#include <config.h>	#include <config.h>

Line 20	Line 20
#include <unistd.h>	#include <unistd.h>

#include <errno.h>	#include <errno.h>
#include <sys/types.h>	#include <string.h>
#include <sys/stat.h>	#include <sys/stat.h>
#include <stddef.h>

#if !HAVE_READLINK	#if !HAVE_READLINK

/* readlink() substitute for systems that don't have a readlink() function,	/* readlink() substitute for systems that don't have a readlink() function,
such as DJGPP 2.03 and mingw32. */	such as DJGPP 2.03 and mingw32. */

/* The official POSIX return type of readlink() is ssize_t, but since here	ssize_t
we have no declaration in a public header file, we use 'int' as return	readlink (const char name, char buf _GL_UNUSED,
type. */	size_t bufsize _GL_UNUSED)

int
readlink (const char path, char buf, size_t bufsize)
{	{
struct stat statbuf;	struct stat statbuf;

/* In general we should use lstat() here, not stat(). But on platforms	/* In general we should use lstat() here, not stat(). But on platforms
without symbolic links lstat() - if it exists - would be equivalent to	without symbolic links, lstat() - if it exists - would be equivalent to
stat(), therefore we can use stat(). This saves us a configure check. */	stat(), therefore we can use stat(). This saves us a configure check. */
if (stat (path, &statbuf) >= 0)	if (stat (name, &statbuf) >= 0)
errno = EINVAL;	errno = EINVAL;
return -1;	return -1;
}	}

#endif	#else /* HAVE_READLINK */

	# undef readlink

	/* readlink() wrapper that uses correct types, for systems like cygwin
	1.5.x where readlink returns int, and which rejects trailing slash,
	for Solaris 9. */

	ssize_t
	rpl_readlink (const char name, char buf, size_t bufsize)
	{
	# if READLINK_TRAILING_SLASH_BUG
	size_t len = strlen (name);
	if (len && name[len - 1] == '/')
	{
	/* Even if name without the slash is a symlink to a directory,
	both lstat() and stat() must resolve the trailing slash to
	the directory rather than the symlink. We can therefore
	safely use stat() to distinguish between EINVAL and
	ENOTDIR/ENOENT, avoiding extra overhead of rpl_lstat(). */
	struct stat st;
	if (stat (name, &st) == 0)
	errno = EINVAL;
	return -1;
	}
	# endif /* READLINK_TRAILING_SLASH_BUG */
	return readlink (name, buf, bufsize);
	}

	#endif /* HAVE_READLINK */

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Removed from v.1.1
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	Added in v.1.1.1.3