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88 lines
1.6 KiB
C
88 lines
1.6 KiB
C
/* Reentrant version of close system call. */
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#include <reent.h>
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#include <unistd.h>
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#include <_syslist.h>
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#include <errno.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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/*
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FUNCTION
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<<_close_r>>---Reentrant version of close
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INDEX
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_close_r
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ANSI_SYNOPSIS
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#include <reent.h>
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int _close_r(struct _reent *<[ptr]>, int <[fd]>);
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TRAD_SYNOPSIS
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#include <reent.h>
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int _close_r(<[ptr]>, <[fd]>)
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struct _reent *<[ptr]>;
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int <[fd]>;
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DESCRIPTION
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This is a reentrant version of <<close>>. 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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extern unsigned __NFiles;
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#define __handle_check( __h, __r ) \
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if( (__h) < 0 || (__h) > __NFiles ) { \
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ptr->_errno = EBADF ; \
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return( __r ); \
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}
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int
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_DEFUN(_close_r, (ptr, fd),
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struct _reent *ptr _AND
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int fd)
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{
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int ret;
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int h;
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__file_handle *fh;
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__handle_check( fd, -1 );
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fh = (__file_handle*) __getOSHandle( fd );
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if( fd > STDERR_FILENO )
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{
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_free_r(ptr, fh->name);
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_free_r(ptr, fh);
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__freePOSIXHandle( fd );
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__SetIOMode_nogrow( fd, 0 );
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}
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return 0;
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}
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int
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_DEFUN( close,(fd),
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int fd)
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{
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return _close_r(_REENT, fd);
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}
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#endif /* ! defined (REENTRANT_SYSCALLS_PROVIDED) */
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