66 lines
1.3 KiB
C
66 lines
1.3 KiB
C
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/* Reentrant versions of fcntl system call. This implementation just
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calls the fcntl system call. */
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#include <reent.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <_syslist.h>
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/* Some targets provides their own versions of these functions. Those
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targets should define REENTRANT_SYSCALLS_PROVIDED in TARGET_CFLAGS. */
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#ifdef _REENT_ONLY
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#ifndef REENTRANT_SYSCALLS_PROVIDED
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#define REENTRANT_SYSCALLS_PROVIDED
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#endif
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#endif
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#ifndef REENTRANT_SYSCALLS_PROVIDED
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/* We use the errno variable used by the system dependent layer. */
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#undef errno
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extern int errno;
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/*
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FUNCTION
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<<_fcntl_r>>---Reentrant version of fcntl
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INDEX
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_fcntl_r
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ANSI_SYNOPSIS
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#include <reent.h>
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int _fcntl_r(struct _reent *<[ptr]>,
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int <[fd]>, int <[cmd]>, <[arg]>);
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TRAD_SYNOPSIS
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#include <reent.h>
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int _fcntl_r(<[ptr]>, <[fd]>, <[cmd]>, <[arg]>)
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struct _reent *<[ptr]>;
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int <[fd]>;
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int <[cmd]>;
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int <[arg]>;
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DESCRIPTION
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This is a reentrant version of <<fcntl>>. It
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takes a pointer to the global data block, which holds
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<<errno>>.
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*/
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int
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_fcntl_r (ptr, fd, cmd, arg)
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struct _reent *ptr;
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int fd;
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int cmd;
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int arg;
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{
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int ret;
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errno = 0;
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if ((ret = _fcntl (fd, cmd, arg)) == -1 && errno != 0)
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ptr->_errno = errno;
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return ret;
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}
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#endif /* ! defined (REENTRANT_SYSCALLS_PROVIDED) */
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