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67 lines
1.3 KiB
C
67 lines
1.3 KiB
C
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/* Reentrant versions of file system calls. These implementations
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just call the usual system calls. */
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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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/* 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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#ifdef REENTRANT_SYSCALLS_PROVIDED
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int _dummy_link_syscalls = 1;
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#else
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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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<<_link_r>>---Reentrant version of link
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INDEX
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_link_r
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ANSI_SYNOPSIS
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#include <reent.h>
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int _link_r(struct _reent *<[ptr]>,
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const char *<[old]>, const char *<[new]>);
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TRAD_SYNOPSIS
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#include <reent.h>
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int _link_r(<[ptr]>, <[old]>, <[new]>)
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struct _reent *<[ptr]>;
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char *<[old]>;
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char *<[new]>;
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DESCRIPTION
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This is a reentrant version of <<link>>. 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 (_link_r, (ptr, old, new),
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struct _reent *ptr _AND
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_CONST char *old _AND
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_CONST char *new)
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{
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int ret;
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errno = 0;
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if ((ret = _link (old, new)) == -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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