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2000-03-29 Jes Sorensen <jes@pcatls01.cern.ch> * malloc/malloc.c: Declare bit flags UL so that they will not default to int size when being inverted. 2000-03-29 Andreas Jaeger <aj@suse.de> * sysdeps/unix/sysv/linux/arm/errlist.c: Use shlib-compat macros. * sysdeps/unix/sysv/linux/arm/siglist.c: Likewise. 2000-03-29 Andreas Jaeger <aj@suse.de>, Ralf Baechle <ralf@uni-koblenz.de> * Makeconfig: Introduce new variable SHARED to mark code used in the shared library. * elf/dl-close.c: Use it instead of PIC. * elf/dl-load.c: Likewise. * elf/dl-open.c: Likewise. * hurd/geteuids.c: Likewise. * include/libc-symbols.h: Likewise. * include/shlib-compat.h: Likewise. * libio/freopen.c: Likewise. * linuxthreads/cancel.c: Likewise. * linuxthreads/pthread.c: Likewise. * linuxthreads/wrapsyscall.c: Likewise. * nss/nsswitch.c: Likewise. * stdio-common/vfprintf.c: Likewise. * sysdeps/arm/init-first.c: Likewise. * sysdeps/i386/init-first.c: Likewise * sysdeps/generic/init-first.c: Likewise. * sysdeps/generic/libc-start.c: Likewise. * sysdeps/mips/init-first.c: Likewise. * sysdeps/powerpc/elf/libc-start.c: Likewise. * sysdeps/unix/sysv/linux/init-first.c: Likewise. * sysdeps/unix/sysv/linux/arm/siglist.c: Likewise. * sysdeps/unix/sysv/linux/arm/errlist.c: Likewise. * sysdeps/unix/sysv/linux/i386/chown.c: Likewise. * sysdeps/mips/machine-gmon.h (asm): Use __PIC__ as check.
129 lines
3.2 KiB
C
129 lines
3.2 KiB
C
/* chown() compatibility.
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Copyright (C) 1998, 2000 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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#include <limits.h>
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#include <sys/syscall.h>
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#include <stdlib.h>
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/*
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In Linux 2.1.x the chown functions have been changed. A new function lchown
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was introduced. The new chown now follows symlinks - the old chown and the
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new lchown do not follow symlinks.
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This file emulates chown() under the old kernels.
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*/
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extern int __syscall_chown (const char *__file,
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uid_t __owner, gid_t __group);
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int
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__chown (const char *file, uid_t owner, gid_t group)
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{
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int err;
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int old_errno;
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char link[PATH_MAX+2];
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char path[2*PATH_MAX+4];
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int loopct;
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int filelen;
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static int libc_old_chown = 0 /* -1=old linux, 1=new linux, 0=unknown */;
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if (libc_old_chown == 1)
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return __syscall_chown (file, owner, group);
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old_errno = errno;
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#ifdef __NR_lchown
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if (libc_old_chown == 0)
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{
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err = __syscall_chown (file, owner, group);
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if (err != -1 || errno != ENOSYS)
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{
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libc_old_chown = 1;
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return err;
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}
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libc_old_chown = -1;
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}
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#endif
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err = __readlink (file, link, PATH_MAX+1);
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if (err == -1)
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{
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errno = old_errno;
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return __lchown(file, owner, group);
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}
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filelen = strlen (file) + 1;
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if (filelen > sizeof(path))
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{
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errno = ENAMETOOLONG;
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return -1;
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}
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memcpy (path, file, filelen);
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/* 'The system has an arbitrary limit...' In practise, we'll hit
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ENAMETOOLONG before this, usually. */
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for (loopct = 0; loopct < 128; loopct++)
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{
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int linklen;
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if (err >= PATH_MAX+1)
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{
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errno = ENAMETOOLONG;
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return -1;
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}
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link[err] = 0; /* Null-terminate string, just-in-case. */
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linklen = strlen (link) + 1;
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if (link[0] == '/')
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memcpy (path, link, linklen);
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else
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{
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filelen = strlen (path);
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while (filelen > 1 && path[filelen-1] == '/')
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filelen--;
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while (filelen > 0 && path[filelen-1] != '/')
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filelen--;
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if (filelen + linklen > sizeof(path))
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{
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errno = ENAMETOOLONG;
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return -1;
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}
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memcpy (path+filelen, link, linklen);
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}
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err = __readlink(path, link, PATH_MAX+1);
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if (err == -1)
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{
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errno = old_errno;
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return __lchown(path, owner, group);
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}
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}
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errno = ELOOP;
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return -1;
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}
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#include <shlib-compat.h>
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versioned_symbol (libc, __chown, chown, GLIBC_2_1);
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