mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-18 11:00:07 +00:00
9c3b1ceba8
* string/bits/string2.h (strspn): Evaluate first argument if second is "". (strpbrk): Likewise. * sysdeps/i386/i486/bits/string.h: Likewise. * string/Makefile (tests): Add bug-strspn1 and bug-strpbrk1. * string/bug-strspn1.c: New file. * string/bug-strpbrk1.c: New file. Test cases by Joseph S. Myers <jsm28@cam.ac.uk>. * string/bits/string2.h (strncat): Terminate string correctly. * sysdeps/i386/i486/bits/string.h (strncat): Likewise. * string/Makefile (tests): Add bug-strncat1. * string/bug-strncat1.c: New file. Test case by Joseph S. Myers <jsm28@cam.ac.uk>. 2000-10-27 Ben Collins <bcollins@debian.org> * sysdeps/generic/lockf.c (lockf): Set l_type to F_RDLCK before calling for F_GETLK. 2000-10-29 Ulrich Drepper <drepper@redhat.com>
72 lines
2.0 KiB
C
72 lines
2.0 KiB
C
/* Copyright (C) 1994, 1996, 1997, 1998, 2000 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
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 of the
|
|
License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include <sys/types.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
|
|
/* lockf is a simplified interface to fcntl's locking facilities. */
|
|
|
|
int
|
|
lockf (int fd, int cmd, off_t len)
|
|
{
|
|
struct flock fl;
|
|
|
|
memset ((char *) &fl, '\0', sizeof (fl));
|
|
|
|
/* lockf is always relative to the current file position. */
|
|
fl.l_whence = SEEK_CUR;
|
|
fl.l_start = 0;
|
|
fl.l_len = len;
|
|
|
|
switch (cmd)
|
|
{
|
|
case F_TEST:
|
|
/* Test the lock: return 0 if FD is unlocked or locked by this process;
|
|
return -1, set errno to EACCES, if another process holds the lock. */
|
|
fl.l_type = F_RDLCK;
|
|
if (__fcntl (fd, F_GETLK, &fl) < 0)
|
|
return -1;
|
|
if (fl.l_type == F_UNLCK || fl.l_pid == __getpid ())
|
|
return 0;
|
|
__set_errno (EACCES);
|
|
return -1;
|
|
|
|
case F_ULOCK:
|
|
fl.l_type = F_UNLCK;
|
|
cmd = F_SETLK;
|
|
break;
|
|
case F_LOCK:
|
|
fl.l_type = F_WRLCK;
|
|
cmd = F_SETLKW;
|
|
break;
|
|
case F_TLOCK:
|
|
fl.l_type = F_WRLCK;
|
|
cmd = F_SETLK;
|
|
break;
|
|
|
|
default:
|
|
__set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
|
|
return __fcntl (fd, cmd, &fl);
|
|
}
|