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66 lines
1.3 KiB
C
66 lines
1.3 KiB
C
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/* Reentrant versions of open system call. */
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#include <reent.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <_syslist.h>
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/* Some targets provides their own versions of this 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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<<_open_r>>---Reentrant version of open
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INDEX
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_open_r
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ANSI_SYNOPSIS
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#include <reent.h>
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int _open_r(struct _reent *<[ptr]>,
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const char *<[file]>, int <[flags]>, int <[mode]>);
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TRAD_SYNOPSIS
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#include <reent.h>
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int _open_r(<[ptr]>, <[file]>, <[flags]>, <[mode]>)
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struct _reent *<[ptr]>;
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char *<[file]>;
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int <[flags]>;
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int <[mode]>;
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DESCRIPTION
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This is a reentrant version of <<open>>. 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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_DEFUN (_open_r, (ptr, file, flags, mode),
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struct _reent *ptr _AND
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_CONST char *file _AND
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int flags _AND
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int mode)
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{
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int ret;
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errno = 0;
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if ((ret = _open (file, flags, mode)) == -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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