diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/i386/lockf64.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/lockf64.c | 135 |
1 files changed, 5 insertions, 130 deletions
diff --git a/sysdeps/unix/sysv/linux/i386/lockf64.c b/sysdeps/unix/sysv/linux/i386/lockf64.c index 6e7603e529..1caf9778e8 100644 --- a/sysdeps/unix/sysv/linux/i386/lockf64.c +++ b/sysdeps/unix/sysv/linux/i386/lockf64.c @@ -1,5 +1,4 @@ -/* Copyright (C) 1994,1996,1997,1998,1999,2000,2003,2006 - Free Software Foundation, Inc. +/* Copyright (C) 1994-2012 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 @@ -23,66 +22,24 @@ #include <string.h> #include <sysdep.h> -#include <kernel-features.h> - /* lockf is a simplified interface to fcntl's locking facilities. */ -#ifdef __NR_fcntl64 -# if __ASSUME_FCNTL64 == 0 -/* This variable is shared with all files that check for fcntl64. The - declaration is in fcntl.c. */ -extern int __have_no_fcntl64; -# endif -#endif - int lockf64 (int fd, int cmd, off64_t len64) { -#if __ASSUME_FCNTL64 == 0 - struct flock fl; - off_t len = (off_t) len64; -#endif -#ifdef __NR_fcntl64 struct flock64 fl64; int cmd64; -#endif - -#if __ASSUME_FCNTL64 == 0 - 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; -#endif -#ifdef __NR_fcntl64 -# if __ASSUME_FCNTL64 == 0 - if (!__have_no_fcntl64) - { -# endif - memset ((char *) &fl64, '\0', sizeof (fl64)); - fl64.l_whence = SEEK_CUR; - fl64.l_start = 0; - fl64.l_len = len64; -# if __ASSUME_FCNTL64 == 0 - } -# endif -#endif + memset ((char *) &fl64, '\0', sizeof (fl64)); + fl64.l_whence = SEEK_CUR; + fl64.l_start = 0; + fl64.l_len = len64; -#if __ASSUME_FCNTL64 == 0 && !defined __NR_fcntl64 - if (len64 != (off64_t) len) - { - /* We can't represent the length. */ - __set_errno (EOVERFLOW); - return -1; - } -#endif 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. */ -#if __ASSUME_FCNTL64 > 0 fl64.l_type = F_RDLCK; if (INLINE_SYSCALL (fcntl64, 3, fd, F_GETLK64, &fl64) < 0) return -1; @@ -90,104 +47,22 @@ lockf64 (int fd, int cmd, off64_t len64) return 0; __set_errno (EACCES); return -1; -#else -# ifdef __NR_fcntl64 - if (!__have_no_fcntl64) - { - int res; - - fl64.l_type = F_RDLCK; - res = INLINE_SYSCALL (fcntl64, 3, fd, F_GETLK64, &fl64); - /* If errno == ENOSYS try the 32bit interface if len64 can - be represented with 32 bits. */ - - if (res == 0) - { - if (fl64.l_type == F_UNLCK || fl64.l_pid == __getpid ()) - return 0; - __set_errno (EACCES); - return -1; - } - else if (errno == ENOSYS) - __have_no_fcntl64 = 1; - else - /* res < 0 && errno != ENOSYS. */ - return -1; - if (len64 != (off64_t) len) - { - /* We can't represent the length. */ - __set_errno (EOVERFLOW); - return -1; - } - } -# endif - 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; -#endif case F_ULOCK: -#if __ASSUME_FCNTL64 == 0 - fl.l_type = F_UNLCK; - cmd = F_SETLK; -#endif -#ifdef __NR_fcntl64 fl64.l_type = F_UNLCK; cmd64 = F_SETLK64; -#endif break; case F_LOCK: -#if __ASSUME_FCNTL64 == 0 - fl.l_type = F_WRLCK; - cmd = F_SETLKW; -#endif -#ifdef __NR_fcntl64 fl64.l_type = F_WRLCK; cmd64 = F_SETLKW64; -#endif break; case F_TLOCK: -#if __ASSUME_FCNTL64 == 0 - fl.l_type = F_WRLCK; - cmd = F_SETLK; -#endif -#ifdef __NR_fcntl64 fl64.l_type = F_WRLCK; cmd64 = F_SETLK64; -#endif break; default: __set_errno (EINVAL); return -1; } -#if __ASSUME_FCNTL64 > 0 return INLINE_SYSCALL (fcntl64, 3, fd, cmd64, &fl64); -#else -# ifdef __NR_fcntl64 - - if (!__have_no_fcntl64) - { - int res = INLINE_SYSCALL (fcntl64, 3, fd, cmd64, &fl64); - - /* If errno == ENOSYS try the 32bit interface if len64 can - be represented with 32 bits. */ - if (res == 0 || errno != ENOSYS) - return res; - - __have_no_fcntl64 = 1; - - if (len64 != (off64_t) len) - { - /* We can't represent the length. */ - __set_errno (EOVERFLOW); - return -1; - } - } -# endif - return __fcntl (fd, cmd, &fl); -#endif } |