diff options
Diffstat (limited to 'newlib/libc/reent/fcntlr.c')
-rw-r--r-- | newlib/libc/reent/fcntlr.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/newlib/libc/reent/fcntlr.c b/newlib/libc/reent/fcntlr.c new file mode 100644 index 000000000..e64dfe28a --- /dev/null +++ b/newlib/libc/reent/fcntlr.c @@ -0,0 +1,65 @@ +/* Reentrant versions of fcntl system call. This implementation just + calls the fcntl system call. */ + +#include <reent.h> +#include <fcntl.h> +#include <sys/stat.h> +#include <_syslist.h> + +/* Some targets provides their own versions of these functions. Those + targets should define REENTRANT_SYSCALLS_PROVIDED in TARGET_CFLAGS. */ + +#ifdef _REENT_ONLY +#ifndef REENTRANT_SYSCALLS_PROVIDED +#define REENTRANT_SYSCALLS_PROVIDED +#endif +#endif + +#ifndef REENTRANT_SYSCALLS_PROVIDED + +/* We use the errno variable used by the system dependent layer. */ +#undef errno +extern int errno; + +/* +FUNCTION + <<_fcntl_r>>---Reentrant version of fcntl + +INDEX + _fcntl_r + +ANSI_SYNOPSIS + #include <reent.h> + int _fcntl_r(struct _reent *<[ptr]>, + int <[fd]>, int <[cmd]>, <[arg]>); + +TRAD_SYNOPSIS + #include <reent.h> + int _fcntl_r(<[ptr]>, <[fd]>, <[cmd]>, <[arg]>) + struct _reent *<[ptr]>; + int <[fd]>; + int <[cmd]>; + int <[arg]>; + +DESCRIPTION + This is a reentrant version of <<fcntl>>. It + takes a pointer to the global data block, which holds + <<errno>>. +*/ + +int +_fcntl_r (ptr, fd, cmd, arg) + struct _reent *ptr; + int fd; + int cmd; + int arg; +{ + int ret; + + errno = 0; + if ((ret = _fcntl (fd, cmd, arg)) == -1 && errno != 0) + ptr->_errno = errno; + return ret; +} + +#endif /* ! defined (REENTRANT_SYSCALLS_PROVIDED) */ |