diff options
Diffstat (limited to 'lib/libc/sys/lseek.c')
| -rw-r--r-- | lib/libc/sys/lseek.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/lib/libc/sys/lseek.c b/lib/libc/sys/lseek.c index 62f7d581b9e..12d2a98c86f 100644 --- a/lib/libc/sys/lseek.c +++ b/lib/libc/sys/lseek.c @@ -32,11 +32,12 @@ */ #if defined(SYSLIBC_SCCS) && !defined(lint) -static char rcsid[] = "$OpenBSD: lseek.c,v 1.5 1997/04/26 08:50:12 tholo Exp $"; +static char rcsid[] = "$OpenBSD: lseek.c,v 1.6 1998/11/20 11:18:53 d Exp $"; #endif /* SYSLIBC_SCCS and not lint */ #include <sys/types.h> #include <sys/syscall.h> +#include "thread_private.h" /* * This function provides 64-bit offset padding that @@ -49,6 +50,13 @@ lseek(fd, offset, whence) int whence; { extern off_t __syscall(); + off_t retval; - return(__syscall((quad_t)SYS_lseek, fd, 0, offset, whence)); + if (_FD_LOCK(fd, FD_RDWR, NULL) != 0) { + retval = -1; + } else { + retval = __syscall((quad_t)SYS_lseek, fd, 0, offset, whence); + _FD_UNLOCK(fd, FD_RDWR); + } + return retval; } |