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https://github.com/samba-team/samba.git
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5afd47147d
there is SYS_utimes syscall defined at compile time in glibc-kernheaders but
it is available on 2.6 kernels only. Therefore, we can't rely on syscall at
compile time but have to check that behaviour during program execution. An easy
workaround is to have replacement for utimes() implemented within our wrapper and
do not rely on syscall at all. Thus, if REPLACE_UTIME is defined already (by packager),
skip these syscall shortcuts.
(This used to be commit e278e2e6e0)
277 lines
8.6 KiB
C
277 lines
8.6 KiB
C
/*
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Unix SMB/CIFS implementation.
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defintions of syscall entries
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Copyright (C) Andrew Tridgell 1998
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#if HAVE_SYS_SYSCALL_H
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#include <sys/syscall.h>
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#elif HAVE_SYSCALL_H
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#include <syscall.h>
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#endif
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#ifdef IRIX
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/* amazingly, IRIX gets its own syscall numbers wrong! */
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#ifdef SYSVoffset
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#if (SYSVoffset == 1)
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#undef SYSVoffset
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#define SYSVoffset 1000
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#endif
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#endif
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#endif
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/* this file is partly derived from zlibc by Alain Knaff */
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#define real_access(fn, mode) (syscall(SYS_access, (fn), (mode)))
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#define real_chdir(fn) (syscall(SYS_chdir, (fn)))
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#define real_chmod(fn, mode) (syscall(SYS_chmod,(fn), (mode)))
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#define real_chown(fn, owner, group) (syscall(SYS_chown,(fn),(owner),(group)))
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#ifdef SYS_getdents
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#define real_getdents(fd, dirp, count) (syscall(SYS_getdents, (fd), (dirp), (count)))
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#endif
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#define real_link(fn1, fn2) (syscall(SYS_link, (fn1), (fn2)))
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#define real_open(fn,flags,mode) (syscall(SYS_open, (fn), (flags), (mode)))
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#ifdef SYS_open64
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#define real_open64(fn,flags,mode) (syscall(SYS_open64, (fn), (flags), (mode)))
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#elif HAVE__OPEN64
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#define real_open64(fn,flags,mode) (_open64(fn,flags,mode))
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#define NO_OPEN64_ALIAS
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#elif HAVE___OPEN64
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#define real_open64(fn,flags,mode) (__open64(fn,flags,mode))
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#define NO_OPEN64_ALIAS
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#endif
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#ifdef HAVE__FORK
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#define real_fork() (_fork())
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#elif HAVE___FORK
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#define real_fork() (__fork())
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#elif SYS_fork
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#define real_fork() (syscall(SYS_fork))
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#endif
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#ifdef HAVE__OPENDIR
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#define real_opendir(fn) (_opendir(fn))
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#elif SYS_opendir
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#define real_opendir(fn) (syscall(SYS_opendir,(fn)))
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#elif HAVE___OPENDIR
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#define real_opendir(fn) (__opendir(fn))
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#endif
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#ifdef HAVE__READDIR
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#define real_readdir(d) (_readdir(d))
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#elif HAVE___READDIR
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#define real_readdir(d) (__readdir(d))
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#elif SYS_readdir
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#define real_readdir(d) (syscall(SYS_readdir,(d)))
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#endif
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#ifdef HAVE__CLOSEDIR
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#define real_closedir(d) (_closedir(d))
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#elif SYS_closedir
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#define real_closedir(d) (syscall(SYS_closedir,(d)))
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#elif HAVE___CLOSEDIR
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#define real_closedir(d) (__closedir(d))
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#endif
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#ifdef HAVE__SEEKDIR
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#define real_seekdir(d,l) (_seekdir(d,l))
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#elif SYS_seekdir
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#define real_seekdir(d,l) (syscall(SYS_seekdir,(d),(l)))
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#elif HAVE___SEEKDIR
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#define real_seekdir(d,l) (__seekdir(d,l))
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#else
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#define NO_SEEKDIR_WRAPPER
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#endif
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#ifdef HAVE__TELLDIR
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#define real_telldir(d) (_telldir(d))
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#elif SYS_telldir
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#define real_telldir(d) (syscall(SYS_telldir,(d)))
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#elif HAVE___TELLDIR
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#define real_telldir(d) (__telldir(d))
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#endif
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#ifdef HAVE__DUP
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#define real_dup(d) (_dup(d))
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#elif SYS_dup
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#define real_dup(d) (syscall(SYS_dup,(d)))
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#elif HAVE___DUP
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#define real_dup(d) (__dup(d))
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#endif
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#ifdef HAVE__DUP2
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#define real_dup2(d1,d2) (_dup2(d1,d2))
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#elif SYS_dup2
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#define real_dup2(d1,d2) (syscall(SYS_dup2,(d1),(d2)))
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#elif HAVE___DUP2
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#define real_dup2(d1,d2) (__dup2(d1,d2))
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#endif
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#ifdef HAVE__GETCWD
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#define real_getcwd(b,s) ((char *)_getcwd(b,s))
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#elif SYS_getcwd
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#define real_getcwd(b,s) ((char *)syscall(SYS_getcwd,(b),(s)))
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#elif HAVE___GETCWD
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#define real_getcwd(b,s) ((char *)__getcwd(b,s))
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#endif
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#ifdef HAVE__STAT
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#define real_stat(fn,st) (_stat(fn,st))
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#elif SYS_stat
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#define real_stat(fn,st) (syscall(SYS_stat,(fn),(st)))
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#elif HAVE___STAT
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#define real_stat(fn,st) (__stat(fn,st))
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#endif
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#ifdef HAVE__LSTAT
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#define real_lstat(fn,st) (_lstat(fn,st))
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#elif SYS_lstat
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#define real_lstat(fn,st) (syscall(SYS_lstat,(fn),(st)))
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#elif HAVE___LSTAT
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#define real_lstat(fn,st) (__lstat(fn,st))
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#endif
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#ifdef HAVE__FSTAT
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#define real_fstat(fd,st) (_fstat(fd,st))
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#elif SYS_fstat
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#define real_fstat(fd,st) (syscall(SYS_fstat,(fd),(st)))
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#elif HAVE___FSTAT
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#define real_fstat(fd,st) (__fstat(fd,st))
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#endif
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#if defined(HAVE_SYS_ACL_H) && defined(HAVE__ACL)
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#define real_acl(fn,cmd,n,buf) (_acl(fn,cmd,n,buf))
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#elif SYS_acl
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#define real_acl(fn,cmd,n,buf) (syscall(SYS_acl,(fn),(cmd),(n),(buf)))
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#elif HAVE___ACL
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#define real_acl(fn,cmd,n,buf) (__acl(fn,cmd,n,buf))
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#else
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#define NO_ACL_WRAPPER
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#endif
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#ifdef HAVE__FACL
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#define real_facl(fd,cmd,n,buf) (_facl(fd,cmd,n,buf))
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#elif SYS_facl
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#define real_facl(fd,cmd,n,buf) (syscall(SYS_facl,(fd),(cmd),(n),(buf)))
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#elif HAVE___FACL
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#define real_facl(fd,cmd,n,buf) (__facl(fd,cmd,n,buf))
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#else
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#define NO_FACL_WRAPPER
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#endif
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#ifdef HAVE__STAT64
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#define real_stat64(fn,st) (_stat64(fn,st))
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#elif HAVE___STAT64
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#define real_stat64(fn,st) (__stat64(fn,st))
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#endif
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#ifdef HAVE__LSTAT64
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#define real_lstat64(fn,st) (_lstat64(fn,st))
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#elif HAVE___LSTAT64
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#define real_lstat64(fn,st) (__lstat64(fn,st))
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#endif
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#ifdef HAVE__FSTAT64
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#define real_fstat64(fd,st) (_fstat64(fd,st))
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#elif HAVE___FSTAT64
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#define real_fstat64(fd,st) (__fstat64(fd,st))
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#endif
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#ifdef HAVE__READDIR64
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#define real_readdir64(d) (_readdir64(d))
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#elif HAVE___READDIR64
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#define real_readdir64(d) (__readdir64(d))
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#endif
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#ifdef HAVE__LLSEEK
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#define real_llseek(fd,ofs,whence) (_llseek(fd,ofs,whence))
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#elif HAVE___LLSEEK
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#define real_llseek(fd,ofs,whence) (__llseek(fd,ofs,whence))
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#elif HAVE___SYS_LLSEEK
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#define real_llseek(fd,ofs,whence) (__sys_llseek(fd,ofs,whence))
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#endif
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#ifdef HAVE__PREAD
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#define real_pread(fd,buf,size,ofs) (_pread(fd,buf,size,ofs))
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#elif HAVE___PREAD
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#define real_pread(fd,buf,size,ofs) (__pread(fd,buf,size,ofs))
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#endif
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#ifdef HAVE__PREAD64
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#define real_pread64(fd,buf,size,ofs) (_pread64(fd,buf,size,ofs))
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#elif HAVE___PREAD64
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#define real_pread64(fd,buf,size,ofs) (__pread64(fd,buf,size,ofs))
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#endif
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#ifdef HAVE__PWRITE
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#define real_pwrite(fd,buf,size,ofs) (_pwrite(fd,buf,size,ofs))
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#elif HAVE___PWRITE
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#define real_pwrite(fd,buf,size,ofs) (__pwrite(fd,buf,size,ofs))
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#endif
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#ifdef HAVE__PWRITE64
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#define real_pwrite64(fd,buf,size,ofs) (_pwrite64(fd,buf,size,ofs))
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#elif HAVE___PWRITE64
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#define real_pwrite64(fd,buf,size,ofs) (__pwrite64(fd,buf,size,ofs))
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#endif
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#define real_readlink(fn,buf,len) (syscall(SYS_readlink, (fn), (buf), (len)))
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#define real_rename(fn1, fn2) (syscall(SYS_rename, (fn1), (fn2)))
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#define real_symlink(fn1, fn2) (syscall(SYS_symlink, (fn1), (fn2)))
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#define real_read(fd, buf, count ) (syscall(SYS_read, (fd), (buf), (count)))
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#define real_lseek(fd, offset, whence) (syscall(SYS_lseek, (fd), (offset), (whence)))
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#define real_write(fd, buf, count ) (syscall(SYS_write, (fd), (buf), (count)))
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#define real_close(fd) (syscall(SYS_close, (fd)))
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#define real_fchdir(fd) (syscall(SYS_fchdir, (fd)))
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#define real_fcntl(fd,cmd,arg) (syscall(SYS_fcntl, (fd), (cmd), (arg)))
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#define real_symlink(fn1, fn2) (syscall(SYS_symlink, (fn1), (fn2)))
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#define real_unlink(fn) (syscall(SYS_unlink, (fn)))
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#define real_rmdir(fn) (syscall(SYS_rmdir, (fn)))
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#define real_mkdir(fn, mode) (syscall(SYS_mkdir, (fn), (mode)))
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/*
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* On GNU/Linux distributions which allow to use both 2.4 and 2.6 kernels
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* there is SYS_utimes syscall defined at compile time in glibc-kernheaders but
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* it is available on 2.6 kernels only. Therefore, we can't rely on syscall at
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* compile time but have to check that behaviour during program execution. An easy
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* workaround is to have replacement for utimes() implemented within our wrapper and
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* do not rely on syscall at all. Thus, if REPLACE_UTIME is defined already (by packager),
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* skip these syscall shortcuts.
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*/
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#ifndef REPLACE_UTIME
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#ifdef SYS_utime
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#define real_utime(fn, buf) (syscall(SYS_utime, (fn), (buf)))
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#else
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#define REPLACE_UTIME 1
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#endif
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#endif
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#ifndef REPLACE_UTIMES
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#ifdef SYS_utimes
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#define real_utimes(fn, buf) (syscall(SYS_utimes, (fn), (buf)))
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#else
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#define REPLACE_UTIMES 1
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#endif
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#endif
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