lib/glibc
1
0
Fork 0
mirror of https://sourceware.org/git/glibc.git synced 2025-12-24 17:51:17 +03:00
Code Activity

Remove pre-2.2 Linux kernel support.

Browse Source
This commit is contained in:
Joseph Myers
2012-05-14 14:11:02 +00:00
parent 1bfb72913b
commit ffb7875d03
40 changed files with 333 additions and 1447 deletions
Download Patch File Download Diff File Expand all files Collapse all files

90
sysdeps/unix/sysv/linux/powerpc/chown.c
View File

@@ -1,5 +1,5 @@
/* chown() compatibility.
Copyright (C) 1998, 2000, 2002, 2003, 2005 Free Software Foundation, Inc.
Copyright (C) 1998-2012 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
@@ -35,95 +35,7 @@
int
__chown (const char *file, uid_t owner, gid_t group)
{
#if __ASSUME_LCHOWN_SYSCALL
return INLINE_SYSCALL (chown, 3, file, owner, group);
#else
int err;
int old_errno;
char link[PATH_MAX + 2];
char path[2 * PATH_MAX + 4];
int loopct;
size_t filelen;
static int libc_old_chown = 0 /* -1=old linux, 1=new linux, 0=unknown */;
if (libc_old_chown == 1)
return INLINE_SYSCALL (chown, 3, __ptrvalue (file), owner, group);
old_errno = errno;
# ifdef __NR_lchown
if (libc_old_chown == 0)
{
err = INLINE_SYSCALL (chown, 3, __ptrvalue (file), owner, group);
if (err != -1 || errno != ENOSYS)
{
libc_old_chown = 1;
return err;
}
libc_old_chown = -1;
}
# endif
err = __readlink (file, link, PATH_MAX + 1);
if (err == -1)
{
__set_errno (old_errno);
return __lchown (file, owner, group);
}
filelen = strlen (file) + 1;
if (filelen > sizeof (path))
{
__set_errno (ENAMETOOLONG);
return -1;
}
memcpy (path, file, filelen);
/* 'The system has an arbitrary limit...' In practise, we'll hit
ENAMETOOLONG before this, usually. */
for (loopct = 0; loopct < 128; ++loopct)
{
size_t linklen;
if (err >= PATH_MAX + 1)
{
__set_errno (ENAMETOOLONG);
return -1;
}
link[err] = 0; /* Null-terminate string, just-in-case. */
linklen = strlen (link) + 1;
if (link[0] == '/')
memcpy (path, link, linklen);
else
{
filelen = strlen (path);
while (filelen > 1 && path[filelen - 1] == '/')
--filelen;
while (filelen > 0 && path[filelen - 1] != '/')
--filelen;
if (filelen + linklen > sizeof (path))
{
errno = ENAMETOOLONG;
return -1;
}
memcpy (path + filelen, link, linklen);
}
err = __readlink (path, link, PATH_MAX + 1);
if (err == -1)
{
__set_errno (old_errno);
return __lchown (path, owner, group);
}
}
__set_errno (ELOOP);
return -1;
#endif
}
libc_hidden_def (__chown)