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(__libc_argv, __libc_argc): Make extern. (__hurd_threadvar_max, __hurd_threadvar_stack_offset, __hurd_threadvar_stack_mask): New variables.

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This commit is contained in:
Miles Bader
1997-02-23 22:09:31 +00:00
parent 4dea6fa212
commit 6bac11d993
17 changed files with 82 additions and 68 deletions
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52
sysdeps/mach/hurd/readlink.c
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@@ -1,4 +1,4 @@
/* Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
/* Copyright (C) 1991, 1992, 1993, 1994, 1995, 1997 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
@@ -32,45 +32,33 @@ DEFUN(__readlink, (file_name, buf, len),
{
error_t err;
file_t file;
char mybuf[2048], *transp = mybuf;
mach_msg_type_number_t translen = sizeof (mybuf);
struct stat st;
file = __file_name_lookup (file_name, O_NOTRANS, 0);
file = __file_name_lookup (file_name, O_READ | O_NOLINK, 0);
if (file == MACH_PORT_NULL)
return -1;
err = __file_get_translator (file, &transp, &translen);
err = __io_stat (file, &st);
if (! err)
if (S_ISLNK (st.st_mode))
{
char *rbuf = buf;
err = __io_read (file, &rbuf, &len, 0, len);
if (!err && rbuf != buf)
{
memcpy (buf, rbuf, len);
__vm_deallocate (__mach_task_self (), (vm_address_t)rbuf, len);
}
}
else
err = EINVAL;
__mach_port_deallocate (__mach_task_self (), file);
if (err)
return __hurd_fail (err);
if (translen < sizeof (_HURD_SYMLINK) ||
memcmp (transp, _HURD_SYMLINK, sizeof (_HURD_SYMLINK)))
/* The file is not actually a symlink. */
err = EINVAL;
else
{
/* This is a symlink; its translator is "/hurd/symlink\0target\0". */
if (len >= translen - sizeof (_HURD_SYMLINK))
{
len = translen - sizeof (_HURD_SYMLINK);
if (transp[translen - 1] == '\0')
/* Remove the null terminator. */
--len;
}
if (buf == NULL)
/* This call is just to find out how large a buffer is required. */
len = translen - sizeof (_HURD_SYMLINK) - 1;
else
/* Copy into the user's buffer. */
memcpy (buf, transp + sizeof (_HURD_SYMLINK), len);
}
if (transp != mybuf)
__vm_deallocate (__mach_task_self (), (vm_address_t) transp, translen);
return err ? __hurd_fail (err) : len;
return len;
}
weak_alias (__readlink, readlink)